Publikace

Autoři:

Coloma-Salazar, M.-E.; Arzola-Ruiz, J.; Marrero-Fornaris, C.-E.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Umer Asgher, MSc., Ph.D.

Publikováno:

2024, Neural Network World, 34 (3), p. 135-168), ISSN 1210-0552

Anotace:

This study presents a comprehensive multi-objective transportation model aimed at optimizing complex vehicle routing problems, which are nondeterministic polynomial time NP-hard due to spatial, temporal, and capacity constraints. In this study, the multi-objective transportation model integrates decisionmaker preferences with hybrid optimization techniques, including the approximatecombinatorial method, ant colony optimization and evolutionary algorithms. it seeks to minimize transportation costs, time, and emissions while accounting for real-world constraints such as fleet composition, customer demand, and servicelevel agreements. The techniques like multi-criteria decision-making methods are employed to refine the solution set, balancing objectives like cost, time, environmental impact, and service level. The novel optimization model is applied to a fuel distribution case study involving 18 customers and a heterogeneous fleet, where it optimizes vehicle routes to meet delivery requirements efficiently. The multiobjective transportation framework generates multiple feasible solutions, which are further narrowed down using decision-making frameworks to ensure alignment with organizational goals and decision-maker preferences. The integration of quantitative optimization techniques with qualitative decision-making processes makes this model robust and scalable, offering a practical tool for enhancing operational efficiency in transportation systems. This approach effectively addresses real-world logistics challenges, demonstrating significant improvements in route efficiency, cost savings, and environmental sustainability.

DOI:

10.14311/NNW.2024.34.008

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Michal Matowicki, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Umer Asgher, MSc., Ph.D.; Ing. Denis Tagunkov

Publikováno:

2024, 2024 New Trends in Aviation Development (NTAD), IEEE (Institute of Electrical and Electronics Engineers)), p. 159-164), ISBN 979-8-3315-2774-7, ISSN 2836-2764

Anotace:

Fear of flying, or aviophobia, is a significant issue affecting a substantial portion of the population, with young adults being particularly vulnerable. Despite the high safety record of aviation, this irrational fear can severely impact an individual’s willingness or ability to travel by air, especially in the context of increasing global air traffic. This study investigates the factors contributing to fear of flying among young commuters aged 18-26 using a stated preference survey. The analysis highlights that fear is primarily driven by emotional responses to situational triggers rather than rational assessments of air travel safety. Key predictors of fear include concerns about terrorism, aviation accidents, and adverse weather conditions, with these factors exerting significant emotional influence despite their statistical rarity. The study also reveals a disconnect between objective safety perceptions and subjective fear, indicating that even passengers who acknowledge the general safety of air travel may still experience anxiety triggered by situational factors.

DOI:

10.1109/NTAD63796.2024.10850014

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Daniel Urban; Ing. Lenka Hanáková, Ph.D.; Křipský, F.; Walton, R.; Pecho, P.

Publikováno:

2024, Journal of Aerospace Engineering, 37 (4), ISSN 0893-1321

Anotace:

The conventional pitot-static tube's accuracy in measuring indicated airspeed is compromised by its longitudinal inclination during forward flight, causing errors when the angle surpasses a critical threshold. This study aimed to propose and assess new designs for pitot-static tube ports to mitigate the angle of attack. Modifications, such as enlarging the inlet cross section, altering the tube port's leading surface angle, and introducing new inlet openings, were implemented in five prototypes. After 2D CFD simulations, these prototypes were 3D printed, and experiments were conducted in a wind tunnel across angles from 0° to 55° at three airflow speeds. CFD results indicated increased error with larger inlet diameters and revealed an oscillating error phenomenon for multiple inlet openings. Experimental tests contradicted expected accuracy issues with extended diameters, suggesting superior characteristics at higher angles of attack. An oscillating error of pitot-static tubes with multiple holes was affirmed. The study targeted a pitot-static tube port design with a maximum 5% error in airspeed measurement within attack angles from 0° to 40°, showing promise for vertical takeoff and landing vehicle airspeed measurement during horizontal forward flight.

DOI:

10.1061/JAEEEZ.ASENG-5578

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Tomáš Malich; doc. Ing. Luboš Socha, Ph.D. et Ph.D.; Ing. Karel Hylmar; Ing. Lenka Hanáková, Ph.D.

Publikováno:

2024, IEEE Access, 12, p. 109806-109821), ISSN 2169-3536

Anotace:

The increasing diversity of multirotor unmanned aerial vehicles (UAV) designs poses significant challenges in evaluating their flight characteristics and performance parameters. This is particularly true for commercially available UAVs whose control units do not provide users with data that could be used, for example, to estimate the operational and flight limits of the flight device itself. This study introduces the concept of a mountable device designed to track and assess the flight parameters of quadcopters, independent of the UAV's systems. Specifically, it involves independent monitoring of rotations, flight speed, air pressure, temperature, and drone orientation in space. The device validation involved real flight tests with the IRIS+ quadcopter using the Pixhawk control system, whose data were taken as a benchmark for validation. To demonstrate the applicability and benefits of such a device, the study also created a concept of an operational envelope for the drone, i.e. dependence of thrust on weight, angle of attack and speed. This concept was created using robotic simulation in the Gazebo environment. In the simulations, the IRIS+ device was used to simulate flights with different payload weights (0.9-2.9 lb, approximately 0.4-1.3 kg) and twenty flight speeds (1-20 ms-1), while simultaneously monitoring the angle of attack and motor revolutions (subsequently converted to thrust). The created operational envelope was subsequently validated using data from real flights. The overall results demonstrated the successful validation of the designed device and the accuracy of the measurement of critical flight parameters, with rotation measurement errors ranging between 100-200 RPM, angle of attack error at 4.25°, and altitude measurement error based on pressure at 0.56 m. Additionally, within this concept, the measurement of indicated airspeed was introduced, reflecting the expected flight speed values. In the context of validating the operational envelope, the results showed that the parameters of real flights fell within the predicted area of the created operational envelope for the IRIS+ drone. Independent monitoring devices like this can benefit operational limit determination and other testing purposes, especially for UAVs lacking data-sharing control units.

DOI:

10.1109/ACCESS.2024.3441115

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Hussain, M.S.; Umer Asgher, MSc., Ph.D.; Nisar, S.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Shaukat, A.; Wang, Jinhui, J.; Feng, T.; Paracha, R.Z.; Khan, M.A.

Publikováno:

2024, Frontiers in Robotics and AI, 11, ISSN 2296-9144

Anotace:

Colonoscopy is a reliable diagnostic method to detect colorectal polyps early on and prevent colorectal cancer. The current examination techniques face a significant challenge of high missed rates, resulting in numerous undetected polyps and irregularities. Automated and real-time segmentation methods can help endoscopists to segment the shape and location of polyps from colonoscopy images in order to facilitate clinician’s timely diagnosis and interventions. Different parameters like shapes, small sizes of polyps, and their close resemblance to surrounding tissues make this task challenging. Furthermore, high-definition image quality and reliance on the operator make real-time and accurate endoscopic image segmentation more challenging. Deep learning models utilized for segmenting polyps, designed to capture diverse patterns, are becoming progressively complex. This complexity poses challenges for real-time medical operations. In clinical settings, utilizing automated methods requires the development of accurate, lightweight models with minimal latency, ensuring seamless integration with endoscopic hardware devices. To address these challenges, in this study a novel lightweight and more generalized Enhanced Nanonet model, an improved version of Nanonet using NanonetB for real-time and precise colonoscopy image segmentation, is proposed. The proposed model enhances the performance of Nanonet using Nanonet B on the overall prediction scheme by applying data augmentation, Conditional Random Field (CRF), and Test-Time Augmentation (TTA). Six publicly available datasets are utilized to perform thorough evaluations, assess generalizability, and validate the improvements: Kvasir-SEG, Endotect Challenge 2020, Kvasir-instrument, CVC-ClinicDB, CVC-ColonDB, and CVC-300. Through extensive experimentation, using the Kvasir-SEG dataset, our model achieves a mIoU score of 0.8188 and a Dice coefficient of 0.8060 with only 132,049 parameters and employing minimal computational resources. A thorough cross-dataset evaluation was performed to assess the generalization capability of the proposed Enhanced Nanonet model across various publicly available polyp datasets for potential real-world applications. The result of this study shows that using CRF (Conditional Random Fields) and TTA (Test-Time Augmentation) enhances performance within the same dataset and also across diverse datasets with a model size of just 132,049 parameters. Also, the proposed method indicates improved results in detecting smaller and sessile polyps (flats) that are significant contributors to the high miss rates.

DOI:

10.3389/frobt.2024.1387491

Typ:

Článek v periodiku excerpovaném databází Scopus

Autoři:

Ing. Karel Hylmar; Ing. Daniel Urban; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2024, New Trends in Civil Aviation: Proceedings of the 24th International Conference on New Trends in Civil Aviation 2024, Praha, České vysoké učení technické v Praze), p. 247-251), ISBN 978-80-01-07181-6, ISSN 2694-7854

Anotace:

The propulsion systems of unmanned aircraft such as multicopters are very vulnerable to any kind of damage. Thus, the presented study introduces the possibility of using vibration sensing to determine the condition of the rotating propeller to detect possible damage or contamination. For the purpose of this study, a test stand was designed and a total of 3 different propeller damages were tested. These included minor and major damage to the tip of the propeller blade as well as disruption of the leading edge profile geometry. Propeller vibration was captured within the operating range of propeller (from 3 500 to 6000 RPM) in the axial X-axis and radial Y-axis. The measured data were processed by spectral analysis, i.e., by calculating the amplitude spectrum using a Fourier Transform. The outputs in the form of spectograms for each damage type and individual RPM were further processed by Principal Component Analysis (PCA). From the PCA, it was possible to identify the vibration frequency spectrum of the tested propeller and the individual damaged states.

DOI:

10.23919/NTCA60572.2024.10517835

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

MUDr. Boris Oniščenko; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Tlapak, J.; doc. Ing. Michal Matowicki, Ph.D.

Publikováno:

2024, International Journal of Industrial Ergonomics, 104, ISSN 0169-8141

Anotace:

Mild hypoxia in aviation is a well-known phenomenon that affects flight safety, particularly in general aviation. Experimental research on its influence on performance and physiological response has been limited, often yielding contradictory results. This study aimed to deepen the understanding of mild hypoxia's effects on pilots' physiological responses and performance. A systematic review was conducted to synthesize existing knowledge and assess the consistency and generalizability of previous findings. Novel empirical data were then obtained through an experiment designed to focus on cardiac activity and performance under mild hypoxic conditions. Twelve male active military pilots participated in the experiment, which involved two simulated flights under controlled conditions. Unlike previous studies, which have varied significantly in methodology and outcomes, this study employed an approach to isolate the effects of mild hypoxia while simultaneously approximating real flight conditions by using a full flight simulator and a reduced oxygen breathing device. The experiment did not indicate significant performance degradation, while compensatory mechanisms in cardiac activity were observed, specifically in the form of increased heart rate and heart rate variability. These findings contribute to the existing body of knowledge by providing a more consistent methodological framework and highlighting the physiological adaptations to mild hypoxia, serving as a foundation for further investigation into the relationship between mild hypoxia, pilot performance, and physiological response.

DOI:

10.1016/j.ergon.2024.103650

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Ing. Karel Hylmar; Bc. Karolína Šobrová; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Umer Asgher, MSc., Ph.D.

Publikováno:

2024, Transportation Research Procedia, Amsterdam, Elsevier B.V.), p. 278-284), ISSN 2352-1465

Anotace:

Vertical take-off and landing unmanned aerial vehicles (VTOL UAVs) are becoming increasingly important in the modern aviation industry. With their growing use, it is essential to find solutions to newly emerging technical problems related to ensuring operational safety. One of these unresolved issues is the accumulation of ice on propeller blades during flight in adverse meteorological conditions. For VTOL UAVs, the propeller blades are the only lifting surfaces, and any disruption of their geometry by an ice layer can lead to the crash of the entire aircraft. A promising solution to this problem, currently being explored experimentally, is the use of hydrophobic coatings, which successfully delay or completely prevent the accumulation of ice. However, hydrophobic coatings currently lack sufficient durability and have a low ability to withstand normal operational wear and tear, causing them to lose their hydrophobic properties quickly. The primary goal of this work is to propose a concept and testing methodology that would allow propeller blades treated with hydrophobic coatings to be exposed to conditions as close as possible to operational wear and tear.

DOI:

10.1016/j.trpro.2024.11.029

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.

Publikováno:

2024, ISBN 978-80-01-07181-6, ISSN 2694-7854

DOI:

10.23919/NTCA60572.2024

Typ:

Sborník z mezinár. konf. cizojazyčně

Autoři:

Ing. Lenka Hanáková, Ph.D.; Ing. Michaela Kalivodová; Bc. Kateřina Vránová; Ing. Karel Hylmar; Ing. Daniel Urban; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2024, New Trends in Civil Aviation: Proceedings of the 24th International Conference on New Trends in Civil Aviation 2024, Praha, České vysoké učení technické v Praze), p. 147-152), ISBN 978-80-01-07181-6, ISSN 2694-7854

Anotace:

This study focuses on the influence of specific sound frequencies on pilot psychophysiological condition within a simulated cockpit environment. Conducted using a flight simulator, the study involved fifteen male pilots with an average of 175 flight hours. The experiment consisted of three key phases: a hearing test, a familiarization flight, and the experimental flight where specific sounds within the 498 Hz to 4000 Hz range were played at 64 dB. These sounds, typical of cockpit noise, were integrated into flight scenario to assess their physiological impact on pilots, monitored via electrocardiograms and focused on heart rate variability, respectively. Also, subjective data were collected using questionnaire. The results suggest, that the specific noise can negatively affect pilots' psychophysiological conditions, increase perceived workload and decrease comfort.

DOI:

10.23919/NTCA60572.2024.10517849

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Miroslav Špák, Ph.D.; doc. Ing. Michal Matowicki, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Luboš Socha, Ph.D. et Ph.D.; Umer Asgher, MSc., Ph.D.

Publikováno:

2024, Aerospace, 11 (12), ISSN 2226-4310

Anotace:

The rapid growth in air traffic has led to increasing congestion at airports, creating bottlenecks that disrupt ground operations and compromise the efficiency of air traffic management (ATM). Ensuring the predictability of ground operations is vital for maintaining the sustainability of the ATM sector. Flight efficiency is closely tied to adherence to assigned airport arrival and departure slots, which helps minimize primary delays and prevents cascading reactionary delays. Significant deviations from scheduled arrival times—whether early or late—negatively impact airport operations and air traffic flow, often requiring the imposition of Air Traffic Flow Management (ATFM) regulations to accommodate demand fluctuations. This study leverages a data-driven machine learning approach to enhance the predictability of in-block and landing times. A Bidirectional Long Short-Term Memory (BiLSTM) neural network was trained using a dataset that integrates flight trajectories, meteorological conditions, and airport operations data. The model demonstrated high accuracy in predicting landing time deviations, achieving a Root-Mean-Square Error (RMSE) of 8.71 min and showing consistent performance across various long-haul flight profiles. In contrast, in-block time predictions exhibited greater variability, influenced by limited data on ground-level factors such as taxi-in delays and gate availability. The results highlight the potential of deep learning models to optimize airport resource allocation and improve operational planning. By accurately predicting landing times, this approach supports enhanced runway management and the better alignment of ground handling resources, reducing delays and increasing efficiency in high-traffic airport environments. These findings provide a foundation for developing predictive systems that improve airport operations and air traffic management, with benefits extending to both short- and long-haul flight operations.

DOI:

10.3390/aerospace11120991

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Došel, P.; Ing. Lenka Hanáková, Ph.D.; Oniščenko, B.; Ing. Stanislav Kušmírek, Ph.D.; Petříček, J.

Publikováno:

2024

Anotace:

The document serves as a research report for project CK02000321, summarizing research activities and presenting the main findings within the context of the project's established goals. In addition, it includes a description of the methodological approaches, ensuring that this research is reproducible. The conducted research represents the largest study in this field worldwide in terms of measurements carried out and data collected. We consider the presented results to be generalizable.

Typ:

Oponovaná výzkumná zpráva cizojazyčně

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Bc. Muhammet Ali Kiraz; Umer Asgher, MSc., Ph.D.

Publikováno:

2024, 2024 New Trends in Aviation Development (NTAD), IEEE (Institute of Electrical and Electronics Engineers)), p. 150-158), ISBN 979-8-3315-2774-7, ISSN 2836-2764

Anotace:

Runway slope illusions, a significant challenge in aviation, can distort pilots’ perception during critical phases of flight, particularly approach and landing. This study explores the susceptibility of pilots to these illusions in a controlled simulator environment using virtual reality technology. A systematic review of existing literature was conducted using the PRISMA methodology, revealing a notable gap in experimental studies directly addressing runway slope illusions. Subsequently, an experimental investigation was designed where 15 pilots performed repeated approaches to runways with varying slopes. Key performance metrics such as mean deviation from the ideal glide slope, standard deviation, RMSE, and time spent below the glide slope were analyzed. Although no statistically significant differences were found across the different runway slopes, patterns emerged, highlighting performance variability, especially on upslope runways. The findings underscore the need for further research into the effects of runway slope illusions on pilot performance, particularly under varying flight conditions.

DOI:

10.1109/NTAD63796.2024.10850454

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Solc, M.; Blasko, P.; Petrik, J.; Girmanova, L.; Blašková, A.; Małysa, T.; Furman, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2024, Metals — Open Access Metallurgy Journal, 14 (4), ISSN 2075-4701

Anotace:

The goal of the fluidity test is to evaluate the ability of the melt to fill the cavity of the mold, which is one of the factors affecting the final quality of the castings. It is a technological test that is basically not standardized, therefore it is realized in different forms, for example using "horizontal" and "vertical" molds. The "horizontal" mold makes it easier to fulfill the condition of repeatability, therefore it was used to calculate the capability of the test by the Measurement Systems Analysis (MSA) method. The results of the tests in both molds were used to calculate regression equations that allow the fluidity to be determined with strong reliability based on variables such as melt temperature, casting speed, and mold temperature. In addition, the effects of input data variability (uncertainty) on the resulting fluidity value were analyzed using regression equations and the Monte Carlo simulation. The contribution of the article is the analysis of the capability of the measurement process of the fluidity and a prediction of the results of its tests using the Monte Carlo simulation method.

DOI:

10.3390/met14040456

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Luboš Socha, Ph.D. et Ph.D.; Ing. Lenka Hanáková, Ph.D.; Hanák, P.; Bc. Dmitriy Gobozov; Umer Asgher, MSc., Ph.D.

Publikováno:

2024, New Trends in Civil Aviation: Proceedings of the 24th International Conference on New Trends in Civil Aviation 2024, Praha, České vysoké učení technické v Praze), p. 53-58), ISBN 978-80-01-07181-6, ISSN 2694-7854

Anotace:

The approach to landing and the landing of an aircraft represent one of the most critical phases of flight. Under certain conditions, a pilot's activity in this phase can be influenced by the visual illusion of the runway aspect ratio. In this context, an experiment was designed to determine the impact of the runway aspect ratio illusion on pilot performance based on its objective evaluation. The experiment was conducted on a flight simulator using a virtual reality headset. Flight data, collected during visual flight rules approaches, were subsequently analyzed. The deviation of the descent angle during visual approaches from the optimal angle for visual aircraft landing was examined. Data analysis using the repeated measures ANOVA confirmed the influence of this illusion on pilots during flight in a simulated environment, as indicated by the root mean square error and maximum absolute error.

DOI:

10.23919/NTCA60572.2024.10517854

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Daniel Urban; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Karel Hylmar; Ing. Stanislav Kušmírek, Ph.D.

Publikováno:

2023, 2023 New Trends in Aviation Development (NTAD), Praha, IEEE Czechoslovakia Section), p. 262-269), ISBN 979-8-3503-7042-3, ISSN 2836-2756

Anotace:

Spatial orientation is very important during flight for the pilot and his ability to correctly perform several parallel tasks related to piloting, navigation and communication. In the event that the pilot loses his own spatial orientation, he must rely solely on the on-board instruments, increasing his workload and the likelihood that the pilot will make a mistake. Further, flight illusions are associated with the loss of spatial orientation and may cause the pilot to perceive inconsistent information about his or her position. Despite the fact that loss of spatial orientation may be commonly encountered by civilian pilots, they are not prepared for these situations as part of their practical training. Although full-flight simulators adapted to induce illusions can be utilized in this context, they are expensive and essentially unused in the training of civilian pilots. This has led to the proposal of a potentially usable and cost-effective technical solution that could be employed in inducing certain types of illusions. Therefore, the article specifically deals with the design of a rotary chair suitable for inducing vestibular nystagmus and the validation of this solution, along with an introduction to the practicality of this solution in the aviation training and research environment.

DOI:

10.1109/NTAD61230.2023.10380183

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Daniel Urban; Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Karel Hylmar; doc. Ing. Jakub Kraus, Ph.D.

Publikováno:

2023, Applied Sciences, 13 (5), ISSN 2076-3417

Anotace:

With the expanding electrification in all sectors of transport, it is necessary to look for new efficient solutions for propulsion systems for use in air transport. One of the approaches can be the use of electric ducted fans (EDFs), especially in, but not limited to, the case of unmanned aerial vehicles with vertical takeoff and landing. This concept has been known for several decades but has been used very little and therefore has been almost unexplored. This opens up opportunities for investigating the performance characteristics, electrical consumption or efficient thrust vectoring of EDFs with respect to their design and operational use. The presented study therefore deals with the influence of the EDF design change on its performance characteristics. These design changes mainly concerned the geometry of the cowling, i.e., reduction and increase of outlet cross section, and arrangement of fans, i.e., one- and two-rotor specification. The comparison was based on measuring of vertical thrust and power consumption during static testing. The results showed that the increasing outlet is the most suitable construction for the generation of vertical thrust during static testing, considering the specifically used EDF construction arrangement. Based on the findings, it can also be concluded that EDFs are a suitable option for use in unmanned aircraft as a competition to other propulsion systems.

DOI:

10.3390/app13052787

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Ing. Lenka Hanáková, Ph.D.; Ing. Viktor Valenta, Ph.D.; Bc. Aleš Řezníček; Ing. Roman Matyáš, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2023, Human Factors in Transportation, New York, Applied Human Factors and Ergonomics International), p. 530-538), ISBN 978-1-958651-71-1

Anotace:

Several strategies can be employed to combat a sudden onset of fatigue. Napping is widely used as one of these strategies. Commercial airlines allow one pilot on flight deck duty to avail of a short rest period in the pilot seat while the other pilot is responsible for the aircraft control – this technique is called controlled rest. Controlled rest is considered a tool to enhance flight safety; this is based on the premise that reducing fatigue leads to an improved pilot condition in the context of cognitive and motor functions. However, this assumption has not been explored on an experimental level and is not supported by objective data. The aim of this study is to evaluate the effect of control rest on pilot performance. Ten pilots participated in the study. The experiment consisted of four experimental flights in a simulator. Two flights were flown on the first night of the experiment without a controlled rest period and several days later another two night flights were flown with a controlled rest period. Deviations from the instrument landing system guidance during the final approach phase were evaluated in terms of precision and accuracy. The analysis of flight data revealed an improvement in horizontal path tracking for flight with controlled rest; this is further supported by the evaluation of excessive deviations in 3D space. On the other hand, significant performance degradation is observed in the vertical plane for flights with controlled rest.

DOI:

10.54941/ahfe1003838

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

Ing. Miroslav Špák, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Michal Matowicki, Ph.D.

Publikováno:

2023, 2023 New Trends in Aviation Development (NTAD), Praha, IEEE Czechoslovakia Section), p. 222-227), ISBN 979-8-3503-7042-3, ISSN 2836-2756

Anotace:

Efficient airport operations are vital for ensuring the seamless flow of aircraft and passengers. However, real-world airport operations often deviate from meticulously crafted plans, necessitating dynamic resource allocation. These challenges become particularly pronounced during peak operational periods when butter capacity is limited. To address these issues, we conducted an analysis utilizing operational data from the airport, along with Filed Tactical Flight Model and Current Tactical Flight Model data, as well as meteorological information. Our study primarily focuses on incoming flights at Prague Airport, where we employed regression analysis, forward parameter selection, and a brute-force approach to identify key parameters. These parameters significantly enhance the predictability of in-block time deviations and delay caused in individual phases of the flight. Our model successfully explains up to 96 % of the variability in the data. In summary, this research aims to optimize airport operations by bridging the gap between planned and actual in-block times, ultimately enhancing airport efficiency. The comprehensive analysis of various data elements offers valuable insights for airport management and decision-makers.

DOI:

10.1109/NTAD61230.2023.10380175

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Terézia Pilmannová, MBA; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Freigang, M.; Stanley Schmidt

Publikováno:

2023, Human Factors in Transportation, New York, Applied Human Factors and Ergonomics International), p. 539-548), ISBN 978-1-958651-71-1

Anotace:

The work of an Air Traffic Controller (ATCO) involves a constantly changing mental workload and the occurrence of stressful situations to which one must react adequately. Candidates for this profession are expected to demonstrate sufficient resilience and adaptability to such situations already in the selection procedure and during the training process. However, the complexity of Air Traffic Controllers' tasks has increased dramatically in the last decades. A transformation of the ATCO training syllabus was inevitable to ensure the ability of future ATCOs to cope with this changing environment. This change has mainly become apparent in the number of practical skills a trainee has to possess even before initiating the On the Job (OJT) training. Training Organizations are constantly optimizing training processes to prepare a candidate able to withstand challenging situations with varying workloads.To investigate trainees' reactions to increased workload in the context of conducted errors, an experiment was organized examining 30 subjects that participated in a simulator exercise with increasing intensity. The subjects of the experiment were Department of Air Transport students with no particular experience in ATC but considerable knowledge of standards and procedures in air traffic control and familiarity with the simulation environment. It is therefore supposed that the level of skills and knowledge of the subjects are equivalent to student Air Traffic Controllers conducting the basic training. The aim of the experiment was to assess the impact of increased workload, utilizing ECG measurement, on the trainees' performance and subsequent error analyses. The increased workload is achieved by continuously increasing the difficulty of the exercises on the ATC simulator. To analyze, the ECG measurement, data, including R-R intervals, were processed by a short Fourier transform(STFT), filtered and further processed by HRVAS (in Matlab) by time-frequency analysis. Data were processed for Low and High Frequency (individual sympathetic and parasympathetic values). A stress value could be obtained by dividing these two values, which were projectedand plotted against time. Further, error analysis has been conducted, observing 12 categories of errors, including wrong phraseology, application of wrong ATC procedures, separation infringement, and loss of situational awareness. The experiment has shown that the students are prone to conduct mainly errors associated with basic procedures while with time and increasing workload, also errors connected to aircraft separation, situational awareness, and flight efficiency. The results indicate that the most common errors include failure to report aircraft/target identification, failure to confirm ATIS and QNH information for a given airport, descending below the transfer level, failure to respect airspace within vertica

DOI:

10.54941/ahfe1003839

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

Ing. Daniel Urban; Ing. Karel Hylmar; Ing. Stanislav Kušmírek, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2023, 2023 International Conference on Military Technologies (ICMT), Vienna, IEEE Industrial Electronic Society), ISBN 979-8-3503-2568-3

Anotace:

The subject of this research is the development of ducted propulsion systems as replacements for traditional propeller propulsion systems intended for unmanned aircraft (UA). With the increasing number of operating UA and level of their automation, new possibilities for using UA in a number of applications are emerging. According to current legislation, one of the main limitations of the use of UA to date is the insufficient safety of UA operations over populated areas. Current UA equipped with propeller drive units do not achieve the required safety due to the rotating propeller blades. Ducted propulsion systems eliminate this shortcoming and provide other advantages that find their place mainly in conditions with space limitations. It is therefore necessary to find an optimal solution to these urban traffic problems. It is thus offered as a safety solution when operating in shared spaces near non-involved persons. The proposed specifications in this study are tested and the data subsequently compared with selected reference propeller drives from the point of view of energy consumption and generated thrust value. The aim of this study is to propose an optimal operational specification of the EDPS engine, suitable for UA operation from the point of view of better energy consumption and generated thrust compared to propellant systems. The results of the study prove that EDPS propulsion systems generate more thrust with lower total energy consumption than conventional propeller systems.

DOI:

10.1109/ICMT58149.2023.10171250

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Mach, O.; Bořil, J.; Řepka, J.; Gogh, L.; Oniščenko, B.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Blasch, E.

Publikováno:

2023, 2023 IEEE/AIAA 42nd Digital Avionics Systems Conference (DASC), Piscataway, Institute of Electrical and Electronics Engineers), ISBN 979-8-3503-3357-2, ISSN 2155-7209

Anotace:

Initial flight training is a new type of space movement for a future pilot. The pilot adapts to the new movement during the first flights, but this process may be accompanied by phenomena such as fatigue, performance degradation, or nausea. In the Czech Air Force environment, future pilots are prepared at the University of Defence, where they undergo flight training during their second year. Prior to this, they use a range of equipment for physical training on which it is possible to derive angular and linear accelerations similar to those experienced by a pilot in flight. The aim of this paper is to analyze and compare selected devices available at the University of Defence, Brno, based on a questionnaire survey on the manifestations of Motion Sickness. The Motion Sickness Assessment Questionnaire (MSAQ) was used for this investigation. 11 students performed three exercises in the first part: gymnastics obstacle course, human gyroscope, and 360° swing. The students self-assessed their manifestations in the form of the MSAQ. In the second part, the instructors assessed the manifestations of motion sickness during flight training in relation to the pilot’s performance decline. Questionnaire data were analyzed using Friedman’s test, and post-hoc multicompare analysis was performed in case of differences between exercises. The results showed that the significant differences between the three types of exercises lie mainly in their influence on factors such as sweating, feeling dizzy, fatigue, feeling of rotation, restlessness, blurred vision, and feeling weak. No significant differences were found in the other 11 items. Each of the tested exercises had its specifics; when appropriately combined, they have the potential to prepare future pilots also due to their availability before the start of flight training.

DOI:

10.1109/DASC58513.2023.10311300

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Kamila Rybenská; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Peter Vittek, Ph.D.

Publikováno:

2022, Transportation Research Procedia, Amsterdam, Elsevier B.V.), p. 172-179), ISSN 2352-1457

Anotace:

This article introduces an adaptation of Flow centrality connectivity measure to business aviation. It demonstrates its potential in the COVID-19 case study, where a significant drop in traffic was observed. Its Connectivity Indicator shows a connectivity paradox during 2020, when connectivity values slightly decreased at first and subsequently exceeded their 2019 values during summer, indicating that airports were connected more effectively compared to the previous year. It is demonstrated in more detail by the examples of airports with the best and worst connectivity during April 2020 and explains the difference in their connectivity value and the number of flights in the context of the pandemic. The results show the potential of this two-dimensional measure in the sector and provide a foundation for further research on business aviation connectivity as a valuable tool for business aviation charter companies to optimize their operations. The study also outlines the economic value of business aviation for Europe and presents different flight missions carried out in this sector, including its key role of conducting medical and repatriation flights during the pandemic.

DOI:

10.1016/j.trpro.2022.11.020

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Jankech, P.; Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Michaela Kalivodová

Publikováno:

2022, 2022 New Trends in Aviation Development (NTAD), Prague, Czechoslovakia Section IEEE), p. 76-80), ISBN 979-8-3503-2036-7

Anotace:

Negative factors affecting the flight safety need to be counteracted by measures based on an understanding of the nature of the problem. Due to the fact that visual illusions are considered a factor capable of endangering the safety of the crew and passengers, it is necessary to understand the mechanics of their creation. Therefore, this paper focuses on the device able to induce specific visual illusion by the means of moving perspective that could be used as a support during the efforts to understand the mechanism of such illusions. The mirror system with variable speed of movement is designed to induce a change of perspective and thus postural destabilization of the subject. Proposed device was tested in the experiment involving postural stability measurements in the form of centre of pressure monitoring using the balance board as the indicators of sucesfull illusion induction. The results does not confirm the ilussion induction. However, the effect of mirror movement direction is observed.

DOI:

10.1109/NTAD57912.2022.10013641

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Vídeňský, J.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Viktor Valenta, Ph.D.

Publikováno:

2022, 2022 New Trends in Civil Aviation (NTCA), Praha, České vysoké učení technické v Praze), p. 109-114), ISBN 978-1-6654-5190-1

Anotace:

Eye tracking is an effective method of observing human-machine interactions. There is a rapidly growing demand for lightweight eye trackers and live data analysis. In this project, a wearable device was designed by attaching existing eye tracking cameras to a new glasses frame. The device was tested in the cockpit of a Cessna 182 with the aim of automatically recognizing individual instruments and highlighting the point of gaze. Software for both real-time and post hoc areas of interest recognition was developed. A machine learning algorithm built a model based on one thousand randomly chosen frames with manually identified instruments. Additional five hundred frames were used to test the model. The system performed very well under well-lit static conditions. In flight, the average success rate of primary flight instruments detection dropped to 0.64. This is still considered acceptable performance, as the test profile included a portion of a flight into direct sunlight. The device is currently used for a pilot fatigue research project and for pilot training.

DOI:

10.23919/NTCA55899.2022.9934332

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Erik Ingeduld; Ing. Tomáš Malich; Ing. Lenka Hanáková, Ph.D.; Ing. Liana Karapetjan; doc. Ing. Luboš Socha, Ph.D. et Ph.D.

Publikováno:

2022, 2022 New Trends in Aviation Development (NTAD), Prague, Czechoslovakia Section IEEE), p. 206-212), ISBN 979-8-3503-2036-7

Anotace:

Ergonomically appropriate placement of flight instruments reduces the crew’s workload and reduces the likelihood of misinterpretation of displayed information. There are established instrument layout standards adapted by aircraft manufacturers that allow pilots to more easily transition from one aircraft to another. However, in certain phases of the flight, increased attention of the crew to the external environment is required. However, the instruments are located on the dashboard and the pilot must still switch between the instruments and the view from the cockpit. This problem is partially solved by the Head-mounted display located in front of the windshield. It is thus possible to follow the displayed information while looking ahead. In this respect, the existing Head-mounted display technology could be surpassed by technology implementing augmented reality into glasses (in some cases into a helmet) as a head/helmet-mounted display. The aim of this article is therefore to design an instrument layout for head-mounted devices. An important part is the conducted pilot testing and evaluation of feedback, which was evaluated using a questionnaire survey. The results point to the possibilities of flight information presentation, which could be configured within the possibilities of the available software and at the same time meet the ergonomic concepts and requirements of the pilots.

DOI:

10.1109/NTAD57912.2022.10013510

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Marek Šudoma; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.

Publikováno:

2022, 2022 New Trends in Civil Aviation (NTCA), Praha, České vysoké učení technické v Praze), p. 93-101), ISBN 978-1-6654-5190-1

Anotace:

Global air transport was experiencing a steady growth for decades despite various economic or political crises. However, the worldwide spread of Covid-19 and its associated travel restrictions led to an unprecedented 60 % drop in global air traffic volume according to the International Civil Aviation Organization (ICAO). This has had a dramatic impact on airline companies and their pilots who were suddenly unable to practice their profession. In order to return to service, they had to go through a simulator scenario aimed at restoring crucial pilot competencies. The following paper describes an experiment conducted with the goal to verify whether a simulator scenario proposed by IATA and adopted by airline companies can restore such competencies. The tailored experiment scenario involved specific flight maneuvers and precision approaches together with theoretical knowledge test. It was completed on a flight simulator with 34 pilots holding a valid type rating for Boeing 737NG. One of the results of the experiment show that the accuracy of a pilot's manual flight may not always correspond with the workload they are subjectively experiencing.

DOI:

10.23919/NTCA55899.2022.9934255

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Karel Hylmar; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Daniel Urban; Ing. Miroslav Špák, Ph.D.

Publikováno:

2022, 2022 New Trends in Civil Aviation (NTCA), Praha, České vysoké učení technické v Praze), p. 115-122), ISBN 978-1-6654-5190-1

Anotace:

Vertical Take-off and Landing Unmanned Aerial Vehicles (VTOL UAVs) are operated at low flight levels, close to the ground, where they are exposed to meteorological conditions, which are difficult to predict and can cause severe degradation of their aerodynamic, performance and flight characteristics. Of these meteorological conditions, icing is one of the most dangerous for the operation of VTOL UAVs. Although icing poses significant safety and operational risks, it has not yet been taken into account in their operation and there are no certified and verified anti-icing and de-icing solutions against it. The aim of this work is to propose a concept together with testing methodology, which would allow to determine the influence of individual meteorological conditions of icing on selected performance characteristics of propulsion systems of VTOLUAVs. Testing and exposure of propulsion systems to icing conditions took place in the climatic chamber. Several series of measurements were performed in the climatic chamber, in which the propulsion systems were exposed to a temperature of 15, of −5, of −10 and of −15°C and a flow of super-cooled water droplets of 1.43 g/s. The mutual comparison of the performed measurements made it possible to determine the influence of individual conditions on the decrease of the thrust, the increase of the consumed electric current and the occurrence of vibrations.

DOI:

10.23919/NTCA55899.2022.9934736

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Liana Karapetjan; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Roman Matyáš, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Petříček, J.; Oniščenko, B.; doc. Ing. Luboš Socha, Ph.D. et Ph.D.; Došel, P.

Publikováno:

2022, Transportation Research Procedia, Amsterdam, Elsevier B.V.), p. 222-229), ISSN 2352-1457

Anotace:

Although illusions may be very common and dangerous, they do not receive enough attention in civil pilots training in terms of identification and experience. In contrast to military aviation, there is not any aeromedical training focused on flight illusions concerning civil aviators to this day. Therefore, the aim of this research was to determine whether to implement vestibular illusion simulator training into IR (Instrument Rating) training. Subsequently, specific parts of IR training along with a particular flight profile were chosen. This was based on the design of a practical experiment, which included induction of specific illusions in various flight profiles and situations. Using spatial disorientation simulator, twenty-five instrument rating instructors were exposed to three flight profiles containing four vestibular illusions. Specifically, it was somatogravic, somatogyral, Coriolis and the leans illusion. After each flight profile, a questionnaire concerning subjective responses regarding specific illusions and flight profiles was filled. Twenty-four out of twenty-five instructors were in favour of implementing vestibular illusion simulator into IR training, either mandatory or on voluntarily basis. The potential integration phase was chosen to be the beginning part or the final part of the IR training. This could lead to an overall improvement for safety of aviation.

DOI:

10.1016/j.trpro.2022.11.026

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Korbelář, I.; Moravec, K.; Bala, M.; doc. Ing. Jakub Kraus, Ph.D.; Vašek, P.; doc. Ing. Peter Vittek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ptáček, B.; Chocholouš, I.; Háčik, Ľ.

Publikováno:

2022

Anotace:

Cílem koncepce národního výcvikového centra (NTC ARFF) je navrhnout a zhodnotit možnosti vytvoření NTC ARFF pro Českou republiku. Národní výcvikové centrum pro složky zajišťující hasičskou a záchrannou službu na letištích v České republice by umožnilo zajišťovat specifický výcvik pro personál, který by dostal specifický trénink zaměřený na leteckou dopravu, a tedy by dokázal řešit specifické situace, na které není prováděn všeobecný výcvik HZS. Vzhledem k tomu, že letiště a heliporty jsou klasifikovány v 10 + 4 kategoriích a pro výcvik je zvoleno 5 + 3 úrovně znalostí personálu, je nutné, aby NTC ARFF CZ odpovídalo těmto úrovním. Cílem návrhu NTC ARFF je zajistit potřebný výcvik vztažený k leteckému provozu, centrum nemá duplikovat výcvik poskytovaný HZS ČR.

Typ:

Výzkumná zpráva v češtině

Autoři:

Ing. Lenka Hanáková, Ph.D.; Snížková, K.; MUDr. Boris Oniščenko; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2022, 2022 New Trends in Civil Aviation (NTCA), Praha, České vysoké učení technické v Praze), p. 205-209), ISBN 978-80-01-06985-1, ISSN 2694-7854

Anotace:

Due to the characteristics of their professional environment, pilots can be exposed to hypoxia. In this case, hypoxia is caused by a low partial oxygen pressure, which results in inferior oxygen saturation and transport ability. Altitude, the amount of time spent under hypoxic conditions, physical activity, individual response, and health conditions influence the severity of hypoxia and her symptoms. Coronavirus disease (COVID-19) primarily affects the respiratory system and the disease itself causes hypoxia. Although COVID-19 influenced the entire population and caused a 2-year pandemic, all the consequences of experiencing the disease are not yet known. To find the possible impact of COVID-19 on the hypoxic state in pilots, an experiment was designed using simulated flights under simulated hypoxic conditions. Breathing activity and oxygen saturation were monitored. The results show that there is a significant difference in respiratory rate and saturation between the normoxic and hypoxic states, but the impact of the disease was not confirmed. The paper presents the concept of monitoring the effect of hypoxia on respiratory rate and oxygen saturation in both pilots who experienced and who have not experienced COVID-19 and can help expand the knowledge base for further research in this area.

DOI:

10.23919/NTCA55899.2022.9934579

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Korbelář, I.; Moravec, K.; Bala, M.; doc. Ing. Jakub Kraus, Ph.D.; Vašek, P.; doc. Ing. Peter Vittek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2022

Anotace:

Návrh a způsob ověření odborné přípravy ARFF je výsledek projektu TIRAMD905 a obsahuje navržený způsob jak ověřovat a hodnotit odbornou způsobilost členů ARFF v navržených oblastech teoretického přezkoušení, praktického přezkoušení a přezkoušení na pracovišti. Zároveň obsahuje checklisty pro zajištění souladu ARFF s legislativními požadavky a ukázky vhodné výzbroje pro ARFF na letištích od kategorie 3 výše.

Typ:

Výzkumná zpráva v češtině

Autoři:

Blasko, P.; Bulko, B.; Petrik, J.; Demeter, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Palfy, P.; Solc, M.; Vasilnakova, A.

Publikováno:

2022, Archives of Metallurgy and Materials, 67 (1), p. 97-104), ISSN 1733-3490

Anotace:

Whereas approximately 96.3% of the steel produced worldwide is made by continuous casting, great emphasis is put on the superior efficiency of this process. The water model of the tundish and mathematical modeling is often used for the simulation of the steel flow during continuous casting. The experiments were performed on a model of the tundish with two outlets, at two casting speeds (0.8 m.s–1 and 1.2 m.s–1). Eight setups of the tundish were evaluated, which differed in the design of the dams (with or without drainage holes), in their distance from the center of the tundish, and their height. The contribution of the work is the analysis of phenomena in the tundish water model in conditions of repeatability (ten repetitions). The goal is to find the setup providing the most symmetrical flow, with the minimum difference in the residence times Δτ on the two outlets. Taking into account the results obtained at both casting speeds, the most preferred is setup 2 with the 87 mm high dams placed 587 mm from the center of tundish (Δτ = 0.5). The setup 3 (Δτ = 8.25) appears to be the least appropriate. The higher the casting speed, the higher the number of unsuitable arrangements.

DOI:

10.24425/amm.2022.137477

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Weiss, J.; Ing. Roman Matyáš, Ph.D.; Ing. Liana Karapetjan; Ing. Terézia Pilmannová, MBA; Ing. Stanislav Kušmírek, Ph.D.

Publikováno:

2022, Transportation Research Procedia, Amsterdam, Elsevier B.V.), p. 275-282), ISSN 2352-1457

Anotace:

Proven by accident statistics, a tired pilot poses a threat to safe flight operations, especially in its critical phases, such as the approach to landing. In the context of the fatigue's impact on the accurate execution of the approach to landing, no research has yet been carried out to experimentally confirm/deny the impact of this factor on the pilot's performance. Therefore, this study examines the impact of fatigue on the final approach phase through a 24-hour flight simulator experiment. Eight subjects participated in the study, performing 15 instrument approaches over the time period defined above. In order to quantify the stabilised portion of the approach, a time-based approach was defined. The approach was based on identifying the portion of the approach executed in the prescribed descent region of pyramidal shape expressed in percent. The results show a link between the precision and accuracy of the instrument approach execution and the level of pilot fatigue, which can lead to unstabilised approaches that negatively affect overall safety. Therefore, the experimental setup, methodology, and results can serve as an evidence-based approach for a more concrete definition of fatigue risk management or as a knowledge base for further development of this issue.

DOI:

10.1016/j.trpro.2022.11.032

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Hrúz, M.; Pecho, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Bugaj, M.

Publikováno:

2022, Transportation Research Procedia, Linz, Elsevier BV), p. 166-173), ISSN 2352-1465

Anotace:

Safety and trouble-free operation are important factors that places aviation among the safest forms of transport. These parameters are achieved mainly by state-of-the-art diagnostic and maintenance programs and methods, which are constantly evolving and increasing their efficiency. The manuscript is focused on the use of a centrifugal blower, on which fault states were artificially simulated and subsequently analyzed by statistical methods not normally used in the field of vibrodiagnostics. The use of principal component analysis (PCA) method played a key role in evaluating the vibrodiagnostic signal of the measured device. The PCA method enabled the categorization of fault conditions and provided a unique view of diagnostic methods with reference to specific signals. The results of the presented research indicate the potential of the PCA method in practice and in the need to carry out further research for other fault conditions. The implementation of such a tool is a prerequisite for more effective determination of specific fault conditions and the use of the PCA method in vibrodiagnostics not only in aviation but also in general industry.

DOI:

10.1016/j.trpro.2021.11.108

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Dittel, D.; Ing. Roman Matyáš, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2022, 2022 New Trends in Civil Aviation (NTCA), Praha, České vysoké učení technické v Praze), p. 123-128), ISBN 978-1-6654-5190-1

Anotace:

This article deals with experimental assessment of whether SPL holders acquire the necessary competencies for the first solo flight in a powered aircraft using only virtual reality. The experiment was performed on a sample of 10 participants who were trained using a simulator based on virtual reality. All participants succeeded in the simulator training, although differences in the length of training required were observed. This training was followed by a flight in a real airplane that consisted of 3 traffic patterns. The participants also filled out questionnaires. This subjective self-assessment was then compared with an objective assessment (flight data, instructor's comments). The outcome was 5 successful and 5 unsuccessful participants of assessment flight in the real airplane. On a sample of 10 participants, areas that are suitable for training in a virtual reality environment were identified. Results indicate that virtual reality is a suitable complement to pilot training, but it is not suitable to use as the only means of flight training.

DOI:

10.23919/NTCA55899.2022.9934442

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Petruš, O.; Macko, J.; Oriňáková, R.; Oriňák, A.; Múdra, E.; Kupková, M.; Farka, Z.; Pastucha, M.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2021, Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 249, ISSN 1386-1425

Anotace:

This work presents the NiAg nanocavity film for the detection of organic dyes by surface-enhanced Raman spectroscopy (SERS). Nanocavity films were prepared by colloidal lithography using 518-nm polystyrene spheres combined with the electrochemical deposition of Ni supporting layer and Ag nanoparticles homogeneous SERS-active layer. The theoretical study was modelled by finite-difference time-domain (FDTD) simulation of electromagnetic field enhancement near the nanostructured surface and experimentally proven by SERS measurement of selected organic dyes (rhodamine 6G, crystal violet, methylene blue, and malachite green oxalate) in micromolar concentration. Furthermore, the concentration dependence was investigated to prove the suitability of NiAg nanocavity films to detect ultra-low concentrations of samples. The detection limit was 1.3 × 10−12, 1.5 × 10−10, 1.4 × 10−10, 7.5 × 10−11 mol·dm−3, and the standard deviation was 20.1%, 13.8%, 16.7%, and 19.3% for R6G, CV, MB, and MGO, respectively. The analytical enhancement factor was 3.4 × 105 using R6G as a probe molecule. The principal component analysis (PCA) was performed to extract the differences in complex spectra of the dyes where the first and second PCs carry 42.43% and 31.39% of the sample variation, respectively. The achieved results demonstrated the suitability of AgNi nanocavity films for the SERS-based detection of organic dyes, with a potential in other sensing applications.

DOI:

10.1016/j.saa.2020.119322

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Tomáš Malich; Gavura, T.; Ing. Viktor Valenta, Ph.D.; Ing. Martin Kavka; Piorecká, V.; doc. Ing. Andrej Lališ, Ph.D.

Publikováno:

2021, 2021 International Conference on Military Technologies (ICMT), Praha, IEEE Czechoslovakia Section), ISBN 978-1-6654-3724-0

Anotace:

Simulation technologies have significantly evolved in recent years. Devices providing high fidelity simulation are becoming widely available in many sectors. In transportation, simulators have proven successful in personnel training, modeling nonstandard situations and even in development and research. The primary use of simulation is still focused on educational purposes. The simulated environment provides grounds for monitoring and assessment of trainees' behavior. However, in addition to simulation technologies, other tools must be deployed. These tools record the physiological functions of the trainee and assess psychophysiological conditions. Specific events, such as a stressful situation, can be detected. Similar scientific-related activities may also lead to assessment of perception. This is a complex problem for both evaluation and data collection. Additionally, it puts specific demands on experimental equipment. The presented article describes the development of a flight simulation device that enables the evaluation of the pilots' perception. This solution is based on X-Plane flight simulation engine with virtual reality (VR) and employs eye-tracking, brain activity monitors and heart activity monitors. The cockpit has a modular design and can be adapted to several aircraft types. VR-Gloves are used to interact with actual aircraft controls such as control yoke, thrust levers and even overhead panel switches. This setup creates a real-feel concept when controlling the aircraft. The presented solution is a technology demonstrator and is being tested with aviation training scenarios.

DOI:

10.1109/ICMT52455.2021.9502823

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; Ing. Tomáš Malich; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Gavura, T.; Ing. Roman Matyáš, Ph.D.; Ing. Karel Hylmar

Publikováno:

2021, 2021 International Conference on Military Technologies (ICMT), Praha, IEEE Czechoslovakia Section), ISBN 978-1-6654-3724-0

Anotace:

New requirements for classifying unmanned aerial vehicles are forcing institutions as well as manufacturers to devise established procedures and methodologies for testing vehicles. A new possibility of dynamic testing of performance parameters of multicopters is offered in addition to conventional software modeling of flight characteristics and static tests in wind tunnels. This alternative is currently hampered by the problem of flight data collection. This work deals with the design of a complex measuring device specially designed for the testing of the flight characteristics of unmanned aerial vehicles. The proposed modular device provides the user with a flight record containing time-synchronized data showing the linear and angular accelerations achieved by the vehicle during flight, three-axis roll, flight altitude, magnetic course, multicopter speeds, and revolutions of each power unit separately. This work further defines the conditions imposed on the type of tested multicopter (load capacity) and the subsequent need for its balancing. The output of this work is to support the experimental research of dynamic quantification of multicopter performance properties during flight.

DOI:

10.1109/ICMT52455.2021.9502763

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Průcha, J.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Richter, A.

Publikováno:

2021, IEEE Access, 9, p. 47136-47143), ISSN 2169-3536

Anotace:

Therapeutic methods taking advantage of low-frequency electromagnetic fields, or in other words, electrical currents contactless-induced by time-variable magnetic fields, enjoy an ever-growing interest in rehabilitation medicine. A great interest is paid to the question of using non-conventional techniques, such as the High Induction Magnetic Stimulation (HIMS). Based on therapeutic principles, it is possible to expect positive effects of this therapy, but this problem has not yet been considered, and thus, there are no research results supporting the HIMS application. Due to this, the target of the article presented here is to study effects of the HIMS on viscoelastic properties of skeletal muscles, since this research has till been missing. Within the framework of the present study, the HIMS was applied to 15 subjects and viscoelastic properties of the muscle were measured before and after the application. The evaluation of hysteresis curves acquired show obvious effects of the HIMS on viscoelastic muscle characteristics. After the HIMS application, the muscle tone was decreased and the elasticity of the tissue exposed was increased in the sample studied.

DOI:

10.1109/ACCESS.2021.3062783

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Snížková, K.; Gavura, T.; Ing. Peter Olexa; Ing. Roman Matyáš, Ph.D.

Publikováno:

2021, Proceedings of the “Transport Means 2021”, Kaunas, Kaunas University of Technology), p. 609-615), ISSN 1822-296X

Anotace:

Due to the characteristics of their profession, pilots are often exposed to fatigue. Irregular shifts, night flights, prolonged wakefulness, crossing multiple time zones and associated circadian rhythm disruptions are just some of the factors contributing to pilot fatigue. As a result of fatigue, cognitive and motor functions are affected, which could lead to reduced performance. If an emergency situation occurs when the pilot is fatigued, it may limit its correct and successful resolution, as evidenced by the accidents to which fatigue was a contributing factor. For these reasons, attention is paid to fatigue in aviation. Many of the negative effects that fatigue has on aircraft crew performance are now known, but the overall impact of fatigue is often underestimated. This is due to a low knowledge of the complexity of the effects of fatigue, as data are collected in the form of individual testimonies of crew members, and therefore the application of this subjective data to the entire population is inaccurate and can lead to errors. One of the characteristics that are affected by fatigue is motor skills. The pilot's movement in the cockpit is severely limited. Most of the physical activity is performed by the upper limbs and head, more precisely the eyes. Compared to the upper limbs, the load on the lower limbs during standard flight is much lower, as the pilot operates not only the control element for deflecting the control surfaces with the upper limbs, but also other on-board instruments....

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Roman Matyáš, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Honzek, J.; Ing. Michaela Kalivodová

Publikováno:

2021, Proceedings of the “Transport Means 2021”, Kaunas, Kaunas University of Technology), p. 715-720), ISSN 1822-296X

Anotace:

Presented article deals with the problematics of operation on more than one type under air operator certificate operations. Multi-type operations have always been often discussed. It is a subject where two fundamental aspects of commercial aviation come into a clash. On one side, the financial requirements of operators always strive to lower operating costs. Thus, an increase in the flexibility of flight crew planning and the lowering of crew training costs can be a strategic win for the company. On the other side lie the safety requirements laid down by the controlling authorities, which play a significant role in protecting the passengers, people on the ground, and the crew. The text focuses on the legislative, operative, and safety problems tied with operations on more than one type. Basic operational restrictions and procedures are laid down according to the European regulations. This article considers the two types for multi-type operations: the Cessna Citation Model 680 Sovereign and Model 700 Longitude. These aircraft belong to the same category of mid-size business jets and remarkably similar in dimensions, performance, and cabin configuration. It is thanks to these similarities that these two types seem to be ideal candidates for multi-type operations. The differences of both aircraft will be examined and analyzed. The safety study is based on the differences observed between the two types. The safety study identifies and evaluates individual hazards and risks of multi-type operations on the C680 and C700. The methodology and process used for the safety study are based on the operator's safety management manual. Operational restrictions and procedures are defined. Among these restrictions, we can find crew planning restrictions, standard operating procedures for the flight crew, and a syllabus draft for additional differential training on both types. The text also suggests procedures for continual safety monitoring during operations on more than one type.

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Liana Karapetjan; doc. Ing. Andrej Lališ, Ph.D.; Ing. Kateřina Stuchlíková; Ing. Michaela Kalivodová; Ing. Tomáš Malich; Ing. Oldřich Štumbauer, Ph.D.

Publikováno:

2021

Anotace:

Cílem projektu bylo vytvoření konceptu měření, analýzy a vyhodnocení psychofyziologické kondice pilotů jako potenciálního indikátoru selhání v závěrečné fázi přiblížení a přistání na letišti, s hlavním ohledem na analýzu variability srdečního rytmu, kvantifikaci EEG a modelování vizuální percepce. Koncept cílil na zvyšování bezpečnosti letecké dopravy tím, že umožní vyhodnocení psychofyziologické kondice a kognitivních schopností posádky ve fázi letu, která patří mezi nejrizikovější a nejvíce náchylné na nedostatky leteckého personálu. Dosažení konceptu umožní další zlepšování úrovně provozní bezpečnosti v letectví pomocí snížení rizika souvisejícího s jednotlivými úkony při přistání na letišti. Pro tyto účely byl vytvořen simulátor, který je schopen prostřednictvím virtuální reality simulovat let se společným sledováním pohybu očí ve scéně a sběr fyziologických dat. Výzkumná zpráva ukazuje na aktivity spojené s realizací tohoto zařízení, předzpracování zaznamenaných dat/signálů, jejich význam, způsob interpretace těchto dat a v neposlední řadě nastavení experimentálních měření a jejich evaluaci. Projekt probíhal od 06/2019 do 05/2021. V rámci řešení projektu vzhledem k pandemii Covid-19 neměl řešitelský tým kontinuální přístup na pracoviště a nebylo tak možné realizovat některé aktivity v plném, zamýšleném rozsahu. Tato situace trvala od 03/2020 do 03/2021 a dopadla především na měření zahrnující lidské subjekty, jejichž realizace nebyla možná vůbec nebo za velmi omezených podmínek. I přes uvedené problémy, vynaložil řešitelský tým značné úsilí pro úspěšné ukončení projektu a splnění všech závazků s ním spojených.

Typ:

Oponovaná výzkumná zpráva v češtině

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Liana Karapetjan; Bořil, T.; Ing. Lenka Hanáková, Ph.D.; Socha, L.; Havel, T.

Publikováno:

2020, 2020 New Trends in Civil Aviation, Praha, IEEE Czechoslovakia Section), p. 117-121), ISBN 978-80-01-06726-0, ISSN 2694-7854

Anotace:

The article deals with the factors contributing to the emergence of a visual illusion, the so-called black hole approach. Among all the visual illusions that can jeopardize the course of a flight in its particular phases, this illusion is quite specific. This illusion arises in cases of visual approach at night. The risks of this illusion, such as hitting the terrain, are known. However, the causes of this illusion and other influencing factors that may result in this illusion are not sufficiently investigated. Therefore, a systematic review was performed in order to summarize the existing knowledge on this issue. The results show that in the case of black hole approach, only basic research is carried out worldwide and there is a lack of studies. However, the studies carried out partially confirm the well-known hypotheses about the origin of this illusion.

DOI:

10.23919/NTCA50409.2020.9290888

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Lenka Hanáková, Ph.D.; Průcha, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Stengl, M.; Ing. Sarah Van Den Bergh

Publikováno:

2020, Applied Sciences, 10 (2), ISSN 2076-3417

Anotace:

Modern approaches to physical therapy often use electric currents induced by time-varying magnetic fields. Although some of these methods are already commonly used, and only a few studies are looking at applying particular techniques on exposed tissue. In this study, a high-induction magnetic stimulation (HIMS) was applied to the chest area to affect the electrical conduction system of the heart. The animal model Sus scrofa domesticus was used for the study. Standard methods were used to make the subsequent analysis, i.e., heart rate variability in time and frequency domain. Concerning the nonlinear character of the electrocardiographic signal and evaluating complex variability (complexity), recurrent quantification analysis was used. The results show high resistance to a physiologically working heart, but there are also specific changes concerning complex variability. Thus, the results indicate that the HIMS application in the chest area may not pose a significant risk to healthy individuals in terms of the short-term effect of this technique on cardiac activity. However, cardiac activity is still, to some extent, affected by the HIMS application. In view of this and the fact that the study was conducted on an animal model, further research in this area would be appropriate.

DOI:

10.3390/app10020589

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Ing. Lenka Hanáková, Ph.D.; Ing. Liana Karapetjan; Ing. Viktor Valenta, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Terézia Pilmannová, MBA; Ing. Peter Olexa

Publikováno:

2020, Transportation Research Procedia, Linz, Elsevier BV), p. 252-260), ISSN 2352-1465

Anotace:

There is a great emphasis on safety in the field of aviation. Advanced technologies open new possibilities and allow objective measurements of specific safety factors. One of these factors is undoubtedly human performance which is already a significant element within a training of aviation personnel. The area of the highest interest is focused on pilot training. The aim of this study is to examine whether a specific psychological training can be considered as a positive performance influencing factor. Subjects underwent an experimental training schedule which was designed for the purpose of this study. Subjects were divided into control (n=20) and experimental (n=20) groups. The experimental group underwent Jacobson progressive relaxation psychological training. Both groups were evaluated during the experimental training schedule; accuracy and precision of piloting was measured during the second and eleventh hour of training. This study focused on basic flight maneuvers, i.e. straight and level flight, 360° horizontal turn with 30° bank and 180° climbing/descending turn with 15° bank and vertical speed of ± 500 ft/min. For the purpose of maneuver identification, Density-based spatial clustering of applications with noise algorithm was used. Each maneuver was evaluated for precision and accuracy and at the same time and used for a performance comparison between groups. Paired and between subject statistical testing were performed using appropriate statistical methods at the level of significance p<0.05. The results indicated that the implemented psychological training did not affect the performance of pilots in terms of precision and accuracy.

DOI:

10.1016/j.trpro.2020.11.028

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Průcha, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Hána, K.

Publikováno:

2020, Biomedical Engineering - Biomedizinische Technik, 65 (4), p. 469-476), ISSN 0013-5585

Anotace:

The present study aimed to evaluate the characteristic influence of physical therapeutic procedures of vacuum-compression therapy (VCT) on microvascular perfusion (MiP) and macrovascular perfusion (MaP) of the lower limb in diabetic patients. A sample of nine patients with a medical history of type 2 diabetes was used for the purpose of this study. Most of the subjects' medical conditions included venous and neurological complications of the lower limb, whereas the rest of the subjects entered the treatment due to injury recovery or their phlebological disease. The PeriFlux System 5000 (Perimed, Sweden) diagnostic device was used to measure MiP. The MaP was evaluated based on the perfusion index (PI) using the Extremiter monitoring device (Embitron, Czech Republic) designed to perform VCT procedures. The study found that MiP and MaP increase as an effect of VCT procedures and at the same time PI clearly reflects the effect of the applied vacuum and compression phases, verifying the method's vital influence on peripheral perfusion disorders.

DOI:

10.1515/bmt-2019-0066

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Luboš Socha, Ph.D. et Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Viktor Valenta, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.

Publikováno:

2020, Applied Sciences, 10 (15), ISSN 2076-3417

Anotace:

During their professional career, pilots often experience a change in workplace conditions in the form of an aircraft cockpit ergonomics change. Change of working conditions may impact their perception of flight data or the pilot's psychophysiological condition, especially in cases of inexperienced pilots. The presented study deals with the influence of cockpit ergonomics change on the performance and pilot workload during a training course. We divided 20 subjects with no previous practical flying experience into two training groups (Gr. A and Gr. B). The flight training was focused on acquisition of basic piloting skills where both groups experienced cockpit ergonomics change in different training phases. The performance (piloting precision) was assessed based on deviations from predetermined parameters of the monitored flight manoeuvres. Heart rate variability qualified the extent of workload. The study showed the influence of the cockpit arrangement on piloting precision, where the transition to other type of cockpit ergonomics did not influence pilots' subjective workload with statistical significance.

DOI:

10.3390/app10155211

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Peter Olexa; Ing. Jakub Šimerka

Publikováno:

2020, 2020 New Trends in Civil Aviation, Praha, IEEE Czechoslovakia Section), p. 135-138), ISBN 978-80-01-06726-0, ISSN 2694-7854

Anotace:

This paper is describing the prototype of a new patent of a Portable Reaction Time Measurement Device whose main assets in comparison to the conventional devices for the similar purposes are the portability, independence on the electrical power source, the absence of the personal computer and the immediate readiness for the usage once the device is turned on. The main contribution of this device is, that it allows to test the actual values of the reaction times at any given time and in any given situation without the necessity of the complicated hardware or software set-ups. It’s construction allows to be used in e.g. the pre-flight psycho-physiological assessment’s of the pilots directly short before the flight conduction or monitoring the daily fluctuation of the reactions readiness directly in the work environment of the concerned study subjects. The basic electrical scheme and the hardware and software components are presented. Furthermore, there was a successful experiment proposed and conducted to test the technical functionalities. Also the usability validation and comparison has been made with the positive outcomes.

DOI:

10.23919/NTCA50409.2020.9290873

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Tomáš Malich; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Roman Matyáš, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Kráčmar, V.

Publikováno:

2020, AIAA/IEEE Digital Avionics Systems Conference - Proceedings, Institute of Electrical and Electronics Engineers, Inc.), ISBN 9781728198255, ISSN 2155-7195

Anotace:

In this paper, we present a complex solution for flight data gathering, analyzation, and visualization. This solution can be used for the Competency-Based Training of pilots in general aviation. For the data gathering, we are introducing a concept of an embedded device. For data analyzation, we are introducing the approach for algorithmic detection of flight maneuvers based on the recorded flight data. There is a multiplatform software application for data visualization. We are also describing the reasons for creating such solutions and potential future uses of our hardware and software products. This paper is mostly describing the important requirements and their implementation regarding the future usage for Competency-Based Training of pilots in general aviation. We are not describing a lot of technical details to keep this paper straightforward and we are mostly focusing on passing the whole idea and benefits of our products.

DOI:

10.1109/DASC50938.2020.9256590

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Bořil, J.; Herman, L.; Štrobl, J.; Ing. Terézia Pilmannová, MBA

Publikováno:

2020, 2020 New Trends in Civil Aviation, Praha, IEEE Czechoslovakia Section), p. 111-116), ISBN 978-80-01-06726-0, ISSN 2694-7854

Anotace:

With developing efforts to increase aviation safety, the focus on human factors is being emphasized as well. One of the phenomena affecting the performance of the pilot or other aviation specialists is undoubtedly the fatigue. Dangerous situations can occur, especially when fatigue accumulates. Monitoring fatigue is therefore in the interest of all stakeholders as well as the aviation authorities, which have developed Fatigue Risk Management System. In spite of the fact that the system itself at its highest level also uses the objective data, to this day, the monitoring of fatigue in aviation has mainly been based on a questionnaire survey. Although, the standardized NASA Task Load Index (NASA TLX) is often applied, it remains questionable whether such a questionnaire realistically reflects the fatigue. Based on previously mentioned, the NASA TLX was modified to focus on pilot fatigue and then applied during 24-hour measurements for the purposes of this paper. Eight pilots took part in the measurement, each of them performed 8 simulated flights. From the results of the questionnaire survey, a window of circadian low can be observed, in accordance with the evaluated theta/alpha parameter obtained by spectral analysis of EEG records. The results therefore indicate that such a questionnaire is able to indicate fatigue.

DOI:

10.23919/NTCA50409.2020.9291239

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Karel Hylmar; Ing. Roman Matyáš, Ph.D.; Kubový, P.

Publikováno:

2020, 2020 New Trends in Civil Aviation, Praha, IEEE Czechoslovakia Section), p. 129-133), ISBN 978-80-01-06726-0, ISSN 2694-7854

Anotace:

In recent years, drones have experienced rapid technological development. The new EU regulations, therefore, apply to both users as well as manufacturers of unmanned aerial vehicles. The mentioned legislation does not yet precisely define the testing methodology and methods of required parameters of each individual category of unmanned aerial vehicles. This study pays special attention to the possibility of dynamic indoor testing of multicopters. It raises the research question of the possibility of experimental determination of the pitch angle as a partial characterisation of a vehicle in flight with manual control of a multicopter against continuous airflow. A simplified wind tunnel generated the airflow with a lamella regulator. Three 10 minute experimental flights were performed against an airflow rate of 1.45 / 2.43 / 3.42 m/s. The task of an experienced pilot was to keep the multicopter in the middle of the airflow during hover manoeuvre. The flight data of the multicopter were recorded by an inertial motion capture (MoCap) system Inertia ProMove in the form of a quaternion and linear accelerations. The results of the study do not show an increase in the median value of the pitch angle of the quadcopter when manually maintaining the hover against the airflow rate in the wind tunnels. On the contrary, as expected, the correlation of the pitch quadcopter and forward linear acceleration was demonstrated. This pilot study presents a possible methodology for indoor testing of a partial aspect of the flight characteristics while drawing attention to the problem of such dynamic testing.

DOI:

10.23919/NTCA50409.2020.9291204

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Viktor Valenta, Ph.D.; Socha, L.; Ábela, R.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Terézia Pilmannová, MBA; Tecl, J.

Publikováno:

2020, Transportation Research Procedia, Linz, Elsevier BV), p. 243-251), ISSN 2352-1465

Anotace:

Air traffic controllers (ATCOs) are exposed to high workload even during routine operations. Their job carries a lot of responsibility and consists of complex tasks. In order to enhance high safety standards, a systematic evaluation of workload levels is required. This study explores an objective measurement of workload. Heart activity of ATCOs was monitored in order to indicate psychological status of ATCOs while being exposed to different levels of workload - in terms of changing traffic loads and airspace complexity. A standard method was used for the evaluation of heart activity. This method includes the frequency analysis in context of heart rate variability; time intervals of consecutive R waves in the heart activity record are assessed. The evaluation of the ratio of power in the low-frequency and high-frequency bands (indicator of sympathovagal balance) as well as parameters derived from fluctuation analysis were used. The results indicated that parameters of heart rate variability based on spectral analysis were significant in case of workload evaluation.

DOI:

10.1016/j.trpro.2020.11.027

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Jakub Nosek, Ph.D.; Ing. Stanislav Pleninger, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2019, SAMI 2019 IEEE 17th World Symposium on Applied Machine Intelligence and Informatics - PROCEEDINGS, Prague, Czechoslovakia Section IEEE), p. 17-22), ISBN 978-1-7281-0250-4

Anotace:

Airborne Collision Avoidance System (ACAS) has become an essential part of civil aircraft’s avionics. The surveillance function of this system provides each aircraft with the position information of other aircraft in vicinity. In order to acquire the position data, the system sends standardized messages on 1030 MHz radio frequency and receives replies on 1090 MHz. Since this frequency band is shared among all surveillance systems used in aviation, it is becoming saturated with the constantly rising air traffic volume. As a result of this saturation the air traffic controllers may not receive all messages transmitted by an aircraft which would lead to inaccurate indication on the radar screens. In order to determine how much ACAS contributes to the overall frequency saturation, it is necessary to observe its behaviour in real environment. This paper should analyze a few selected parameters, such as ACAS surveillance range, nominal surveillance rate or ADS-B version and find out their real values. For this purpose real messages received at 1090 MHz receivers were used and evaluated. The results showed the real value of ACAS surveillance range is much higher than the value stated in technical standards. Other results helped to define the nominal surveillance rate and show that the version of ADS-B which is mostly used in real environment is ADS-B ICAO version 0. These findings can be used as inputs to the tool for RF channels 1030/1090 MHz loading analysis.

DOI:

10.1109/SAMI.2019.8782728

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Freigang, M.; doc. Ing. Jakub Kraus, Ph.D.; Ing. Slobodan Stojić, Ph.D.; Socha, L.; Hanák, P.

Publikováno:

2019, TRANSPORT PROBLEMS, 14 (2), p. 55-67), ISSN 1896-0596

Anotace:

Presented work is primarily oriented on the experimental verification of the influence of fatigue on the psychological condition of the flying personnel, using psychological and performance tests. For the evaluation of a pilot performance, the 24 hours experiment was conducted. In total, eight subjects participated in the experimental measurements. Eight participants went through several tests, including simulator flights, to investigate the effects of the fatigue on the results of psychological measurements. Measurements included workload evaluation, using NASA task load evaluation concept and performance testing, using the so-called OR-test. Significant statistical differences between measurements performed during 24 hours were not found in the case of NASA task load Scores. In the case of OR-test, Friedman ANOVA and subsequent post-hoc analysis show that the greatest decrease in performance was observed in approximately 22 hours of wakefulness, i.e. approximately in half of the measuring process. The concept of 24-hour measurements for the quantification of fatigue is not commonly used yet as well as objectivization using performance testing. As the apparent effect of fatigue is mainly on performance testing results, it can be argued that this work could serve as a basis for further studies on fatigue. Also, it could serve as a support for introducing new pilots' psychological testing procedures in the future, which could contribute to current efforts to improve aviation safety.

DOI:

10.20858/tp.2019.14.2.5

Typ:

Článek v periodiku excerpovaném databází Scopus

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Michaela Kalivodová; Ing. Sarah Van Den Bergh

Publikováno:

2019, 2019 Konference - 25 let Fakulty dopravní, Praha, České vysoké učení technické v Praze), p. 72-74), ISBN 978-80-01-06545-7

Anotace:

Předložený článek představuje Laboratoř lidského faktoru a automatizace v letectví, která je jedním z vědeckých pracovišť na Ústavu letecké dopravy, FD ČVUT v Praze. Studium lidského faktoru v letectví je ve vědecké komunitě známé již několik dekád. Neustálý technický pokrok a výzkum v této oblasti však stále přináší nové otázky a výzvy. Laboratoř má snahu monitorovat nové trendy v diskutované oblasti a zapojovat se do výzkumných aktivit reflektujících současné požadavky ne jen na letecký personál. Článek stručně popisuje nejvýznamnější výzkumné aktivity laboratoře spolu s navázanými spolupracemi.

Typ:

Stať ve sborníku z fakultní konference česky

Autoři:

Ing. Michaela Kalivodová; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Socha, L.; Ing. Roman Matyáš, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.

Publikováno:

2019, TRANSPORT MEANS 2019 - PROCEEDINGS OF THE 23rd INTERNATIONAL SCIENTIFIC CONFERENCE, Kaunas, Kaunas University of Technology), p. 835-840), ISSN 1822-296X

Anotace:

During the flight, pilots are influenced by surrounding stimuli such as environment, gravity, mental state, et cetera, which may affect (in a negative way) the safety of flight. Standard evaluation methods of physiological parameters are used to monitor the pilot's state. The most commonly monitored and evaluated parameter is heart rate because it reflects the regulation of the autonomic nervous system. Based on the knowledge of evaluation of time series consisting of time intervals between two consecutive heartbeats, the spectrum analysis is used in specific frequency bands. Inter alia, such time series are evaluated in a time domain, or by nonlinear methods. Standard spectrum analysis or other nonlinear methods, however, do not contain time information. In other words, it is necessary to apply these analyses on time windows gradually scanning received signal which limits using these methods for real-time evaluation of the psychophysiological condition. This paper discusses the Wavelet Transform being it a method for processing the heart rate variability as it is/seems a perspective method for online monitoring of pilots' psychophysiological state. Measurement of subjects was conducted on a flight simulator and in the aircraft as well. Obtained knowledge might positively affect monitoring pilots in training by adjusting the training according to their specific needs.

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Ing. Roman Matyáš, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Sarah Van Den Bergh; Ing. Michaela Kalivodová; doc. Ing. Andrej Lališ, Ph.D.

Publikováno:

2019, Proceedings of 7th International Conference on Military Technologies, Prague, Czechoslovakia Section IEEE), ISBN 978-1-7281-4593-8

Anotace:

Presented article focuses on support and creating of supporting indicators for Evidence-Based Training, Specific orientation lays on assessment of pilot’s performance and heart rate assessment that may indicate psychophysiological condition of pilot. Method of experimental measurements included two groups (Gr. A and Gr. B) of ten subjects that completed simulator training and flight training on real airplane. Influencing factor for transition from analogue to glass cockpit layout was implemented for both groups where one group completed preparation for the transition (Gr. B) and the other did not (Gr. A). Results demonstrate that precision of piloting technique during final phase of training raised within Gr. B compare to Gr. A, however, rANOVA tests revealed that mean heart rate was almost same for both groups across the training phases. In addition to these facts, significant correlation was detected between subjective and exact assessment of pilot precision which together with other presented results represents the fact that pilot performance assessment could be done mainly by monitoring of pilot precision and correctness of performed lessons and manoeuvres. Presented research brings another possibilities for development of pilot training as well as to data-driven training.

DOI:

10.1109/MILTECHS.2019.8870130

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Průcha, J.; Dylevský, I.; Navrátil, L.; Vlachová, V.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2019, Rehabilitace a Fyzikalni Lekarstvi, 26 (4), p. 174-190), ISSN 1211-2658

Anotace:

Aplikace indukovaných elektrických proudů se v současné rehabilitaci a fyzikální medicíně uplatňují ve stále rostoucí míře. Indukované elektrické proudy jsou vytvářeny časově proměnným magnetickým polem a jsou zřejmě jediným nebo alespoň hlavním biologicky účinným faktorem působení nízkofrekvenčních elektromagnetických polí. Kromě již „klasické“ pulzní magnetoterapie, která poskytuje nejmenší hustoty indukovaných elektrických proudů (obvykle tisíciny až setiny A/m2), se stále více prosazuje i tzv. distanční, čili bezkontaktní elektroterapie, v cizině známá spíše pod názvy contactless electrotherapy, electrodeless therapy, inductively coupled electromagnetic field therapy, high-induction electromagnetic field therapy apod., která obvykle pracuje s vyššími proudovými hustotami amplitud impulzů indukovaných elektrických proudů v řádech minimálně desetin až jednotek A/m2. Významný rozvoj zaznamenává i tzv. vysokoindukční magnetická stimulace (high-induction magnetic stimulation) s percepčními i svalově motorickými účinky, která poskytuje v léčených tkáních proudové hustoty řádově desítek až stovek A/m2. V této práci jsme se nejprve zabývali výzkumem vlivu indukovaných elektrických proudů na senzorické neurony zodpovědné za převod podnětů různých modalit, včetně podnětů souvisejících s nocicepcí. U těchto buněk jsme bradykininem modelovali zánět provázený zvýšením koncentrace kalciových iontů v intracelulárním prostoru. Prokázali jsme vliv distanční elektroterapie i vysokoindukční magnetické stimulace na snížení koncentrace kalcia v buňce i na pomalejší nástup a pokles bradykininem indukované kalciové vlny. Indukované elektrické proudové impulzy. produkované vysokoindukční magnetickou stimulací, spontánní neuronální aktivitu primárních aferentních senzorických buněk bez přítomnosti mediátoru zánětu bradykininu však zvyšovaly. Další výzkum byl zaměřen na studium chování endoteliálních buněk, významných z hlediska angiogeneze, pod vlivem indukovaných elektrických proudů. Zde byl prokázán vliv nízkofrekvenčních impulzních indukovaných elektrických proudů na viabilitu těchto buněk a na jejich metabolickou aktivitu. Naopak na mezenchymální stromální buňky neměly impulzní indukované proudy vliv, ale zato se projevil vliv amplitudově modulovaných indukovaných harmonických proudů kiloherzových frekvencí, kdy byla signifikantně zvýšena migrační schopnost těchto kmenových buněk, podílejících se na regenerativních procesech, jakož i jejich schopnost produkovat ve zvýšené míře matrix-metaloproteinázy. V rámci předložené publikace je referováno též o animální studii, kde byla u sus scrofa aplikována vysokoindukční magnetická stimulace na oblast hrudníku. Přes mohutné svalové kontrakce prsních svalů nebyl z analýzy EKG zjištěn jiný vliv nežli mírné změny HRV (heart rate variability). Na zdravých probandech byl studován vliv vysokoindukční magnetické stimulace na elas

Typ:

Článek v periodiku excerpovaném databází Scopus česky

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Ing. Lenka Hanáková, Ph.D.; Ing. Roman Matyáš, Ph.D.; Rózenberg, R.; Vagner, J.; Kalavský, P.

Publikováno:

2019, TRANSPORT MEANS 2019 - PROCEEDINGS OF THE 23rd INTERNATIONAL SCIENTIFIC CONFERENCE, Kaunas, Kaunas University of Technology), p. 696-701), ISSN 1822-296X

Anotace:

A key to achieving a high and stable level of aviation safety is keeping the required performance of aviation personnel on the highest possible level. It's commonly known that an intense amount of stress characterizes aviation professions which eventually results in affecting the employee's performance. The objectification and optimization of a workload concerning the environmental and ergonomic factors are being subjected to research. Some of the approaches take into account also psychological training of which actual effectivity hasn't yet been proven and thus, is not much supported. In this context, this paper examines so-called relaxation techniques as a form of increasing mental resilience in pilots. Myriad of relaxation techniques are used to release the tension and lower the workload. A selected combination of psychotherapeutic and physiological methods, specifically autosuggestion and affirmation techniques, Jacobson's progressive muscle relaxation method and intentional breathing exercises, was selected for the purpose of this study. A change in the physiological parameters record and a level of error rate in the piloting technique was compared within subject groups in flight training, one without a previous practice of selected relaxation technique and two that underwent the relaxation training.

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Kalavsky, P.; Rozenberg, R.; Petricek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Luboš Socha, Ph.D. et Ph.D.

Publikováno:

2019, 13th Research and Education in Aircraft Design: Conference proceedings, Brno, VUT v Brně, Fakulta strojního inženýrství), p. 76-84), ISBN 978-80-214-5696-9

Anotace:

The article deals with the issue of alternative ways of extraction and insertion of persons by helicopters using rope and non-rope procedures. The article provides a current general overview of rope and non-rope procedures for insertion of persons in places where a helicopter cannot touch down, as well as an overview of techniques used for extraction/transport of persons from places not permitting helicopter touchdown. The article lists advantages and disadvantages of individual methods and their applicability in the helicopter emergency medical service. The main contribution of the article is the comparison of time indicators when inserting and transporting persons by helicopters with the use of rope procedures during typical model situations. For the purposes of comparing rope procedures have been created three typical model situations for inserting two persons from a hovering helicopter and two typical model situations for extracting four persons and their transportation on board. During creating these model situations, we have taken into consideration the most frequently used rope procedures within HEMS in civil, military and police sectors of the Slovak Republic. Total insertion/extraction time was considered the basic piece of data for the comparison. Time data were obtained from flight tests, actual training, technical documentation data and on the basis of the expert estimate. Rope procedures were compared among each other and among three types of helicopters most used for these purposes in the Slovak Republic: Mi-17 LPZS, Bell-429 and AGUSTA A109K2. Processed conclusions from the comparison of each model situation within the considered alternative rope ways of extraction and insertion of persons by helicopters and the conclusions drawn from the performance comparison of HEMS helicopters in the Slovak Republic within these model situations are a significant contribution to the determination of procedures in the framework of rescue missions.

DOI:

10.13164/conf.read.2018.8

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2019, ISBN 978-80-907724-0-3

Typ:

Sborník z mezinár. konf. cizojazyčně

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Sarah Van Den Bergh; Ing. Michaela Kalivodová; doc. Ing. Jakub Kraus, Ph.D.; Petruš, O.

Publikováno:

2019, TRANSPORT MEANS 2019 - PROCEEDINGS OF THE 23rd INTERNATIONAL SCIENTIFIC CONFERENCE, Kaunas, Kaunas University of Technology), p. 1197-1202), ISSN 1822-296X

Anotace:

Since the beginning, aviation has been exposed to the risk of threats of unlawful acts, such as attacks, hijacks, or bomb attacks. The priority of current safety systems is to eliminate the risk of possible unlawful acts to critical infrastructure. However, tightening the net of security checks has a downside - individuals or organizations execute the act of violence even before the baggage security check done by mainstream spectroscopic methods. Thus, airport terminals with large crowd concentration are becoming a perfect target for terrorists to attack. A factor contributing to forming a crowd is a thorough, time-consuming security check. In a short time, the crowd concentration rapidly increases in an unsecured perimeter and as such, is an easy target. Man-made explosives, as well as several military, industry or difficult to access, have a common component - ammonia. Bombs could be made by various forms of ammonia, like ammonium nitrate, chloraminȩ or a compound of ammonia and aluminum oxide. For that reason, the detection of ammonia present in airports becomes a frequently discussed topic among aviation security experts. The paper aims to create a concept of the sensory network able to monitor in 2D or localize a source of ammonia trace elements. The proposed idea is intended to use in airports, but the concept is also applicable in places where a noninvasive and contact-less passenger or baggage security check is needed.

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; doc. Ing. Andrej Lališ, Ph.D.; doc. Ing. Jakub Kraus, Ph.D.; Ing. Tomáš Malich

Publikováno:

2019, SAMI 2019 IEEE 17th World Symposium on Applied Machine Intelligence and Informatics - PROCEEDINGS, Prague, Czechoslovakia Section IEEE), p. 181-186), ISBN 978-1-7281-0250-4

Anotace:

This study presents the issue of fatigue and its quantification by the means of psychophysiological indicators. For the purpose of the study, 24 hours experiment was proposed consisting of eight about an hour long simulated IFR flights. Eight students of the Department of Air Transport, Faculty of Transportation Sciences, Czech Technical University in Prague participated in the study, all with comparable theoretical and practical skills. During individual flights, ECG curve was recorded as a heart activity signal. From the ECG signal, individual RR intervals were extracted and subsequently an analysis in three areas was performed: time and frequency analysis and analysis by the means of Pointcaré plot. The acquired data were statistically evaluated and compared. Based on Friedman ANOVA and subsequent post-hoc analysis, statistically significant differences between first and sixth measurement were identified, which corresponded to the circadian low. It is also possible to claim that Pointcaré plot appears as a suitable means for fatigue quantification.

DOI:

10.1109/SAMI.2019.8782724

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Lenka Hanáková, Ph.D.; Průcha, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Štengl, M.; Ing. Sarah Van Den Bergh

Publikováno:

2019, 42nd International Conference on Telecommunications and Signal Processing, Brno, VUT v Brně, Fakulta elektrotechniky a komunikačních technologií), p. 332-337), ISBN 978-1-7281-1864-2

Anotace:

Modern physical therapy could be conducted in many ways. Some of them are based on methods using the biophysical stimulation with a time-varying magnetic field. Although there are many devices functioning on this principle, the effect of the magnetic field remains arguable. Nowadays, the trend is to use low-frequency electromagnetic fields which allow an induced electric current to form in the exposed tissue. However, the use of such magnetic fields is associated with certain risks. It is questionable whether the application of such magnetic fields in certain locations might affect physiological electrical activity concerning the fact that the electrical current is generated in the tissue. For this reason, this paper aimed to monitor the effect of high-induction magnetic stimulation in an area where the electrical conduction system of the heart could be affected. Although no pathological signs in the ECG record were observed by the supervising physician, the results show that after the application of high-induction magnetic stimulation, the variability of the heart rhythm is affected since statistically significant differences were observed in the values of parameters describing the variability, i.e. SDNN (p = 0.040) and stdHR (p = 0.004), pre and post the HIMS application.

DOI:

10.1109/TSP.2019.8769080

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Průcha, J.; Skopalik, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Knopflová, L.; Hána, K.

Publikováno:

2019, Physiological Research, 68 (4), p. 611-622), ISSN 0862-8408

Anotace:

Effects of low-frequency electromagnetic fields (LF EMF) on the activation of different tissue recovery processes have not yet been fully understood. The detailed quantification of LF EMF effects on the angiogenesis were analysed in our experiments by using cultured human and mouse endothelial cells. Two types of fields were used in the tests as follows: the LF EMF with rectangular pulses, 340-microsecond mode at a frequency of 72 Hz and peak intensity 4 mT, and the LF EMF with sinusoidal alternating waveform 5 000 Hz, amplitude-modulated by means of a special interference spectrum mode set to a frequency linear sweep from 1 to 100 Hz for 6 s and from 100 Hz to 1 Hz return also for 6 s, swing period of 12 second. Basic parameters of cultured cells measured after the LF EMF stimulus were viability and proliferation acceleration. Both types of endothelial cells (mouse and human ones) displayed significant changes in the proliferation after the application of the LF EMF under conditions of a rectangular pulse mode. Based on the results, another test of the stimulation on a more complex endothelial-fibroblast coculture model will be the future step of the investigation.

DOI:

10.33549/physiolres.933998

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Ing. Tomáš Malich; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Sarah Van Den Bergh; Ing. Michaela Kalivodová; Socha, L.; Ing. Slobodan Stojić, Ph.D.; doc. Ing. Jakub Kraus, Ph.D.

Publikováno:

2019, Proceedings of 7th International Conference on Military Technologies, Prague, Czechoslovakia Section IEEE), ISBN 978-1-7281-4593-8

Anotace:

The aim of the article is to present a software design for the design and adaptation of flight routes and spaces, or respectively, of the Air Traffic Control sectors. Presented system uses the means of virtual and augmented reality. The functional and non-functional requirements that led to the software design of the introduced system were defined. Functionality has been verified by a partial implementation in C# language. With regard to real visualization in 3D, the future use of the system in air traffic control training is intended. There are also several visions of the future that could fairly change the air traffic control rules. Therefore, it is also intended to make the system flexible enough to be expanded for further applications.

DOI:

10.1109/MILTECHS.2019.8870030

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Ing. Slobodan Stojić, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Socha, L.; Antoško, M.

Publikováno:

2018, New Trends in Civil Aviation, Leiden, CRC Press/Balkema), p. 15-19), ISBN 978-0-8153-7602-6

Anotace:

Currently, the most erroneous element during the flight operation is a human. Regarding to continuous efforts spent on increase of the air transport safety level, a greater attention is now focused on human factors and comprehension of the factors having a negative impact on pilots and other crew members. The main goal of this study is to evaluate the fatigue effect on pilot performance during at least 24-hour measurements. The whole measurement consisted of two-hour time blocks, during which the pilot was flying, then the reaction time was measured and at the end psychological tests were conducted. The reaction time was chosen as an indicator of short-term performance. The study involved 4 pilots (men aged 21–27 years) with a given pre-flight regime. The results show that even though the pilots experienced a gradual fatigue during the measurements, it did not manifest in reaction times measurements. It can be stated, that despite the fatigue, the pilots are able to maintain short-term attention and maintain constant performance.

DOI:

10.1201/9781351238649-3

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Ing. Michaela Kalivodová; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Jakub Kraus, Ph.D.; doc. Ing. Jakub Hospodka, Ph.D.; Ing. Sarah Van Den Bergh; Ing. Roman Matyáš, Ph.D.

Publikováno:

2018, Young Transportation Engineers Conference 2018, Praha, Fakulta dopravní), ISBN 978-80-01-06464-1

Anotace:

Advisory procedures are meant to be simple operation procedures based on the use of GNSS when flying under VFR, without degrading flight safety. To prove that procedural steps or predetermined manoeuvres are beneficial for pilots, it´s done underwent a series of testing. It was used observation of physiology parameters to obtain quantitative values of the level of psychical condition on testing subjects during VFR flight on simulator with and without GNSS in use, to determine if proper usage of GNSS decreases workload of pilots. The study was attended by 9 students of the Department of Air Transport, CTU in Prague, Faculty of Transportation Sciences. The measured data was collected in the form of bio signals using the VLV-LAB system. For the purposes of evaluating the psychophysiological status of the pilots, a heart rate record was chosen as the main indicator – heart rate variability (HRV), i.e. duration of each R-R interval. Measured data was evaluated by standard methods in the time domain. All measured subjects had a decrease (meanHR), respectively increase (meanRR) of given parameters in with-GPS measurements compared to without-GPS measurements.

Typ:

Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Socha, L.; Ing. Sarah Van Den Bergh; doc. Ing. Andrej Lališ, Ph.D.; doc. Ing. Jakub Kraus, Ph.D.

Publikováno:

2018, Proceedings of New Trends in Aviation Development 2018. The XIII. International Scientific Conference, Prague, Czechoslovakia Section IEEE), p. 82-86), ISBN 978-1-5386-7918-0

Anotace:

Ever-changing situation in the aviation demands a change in flight training programs that would reflect present needs and threats in contrary to the traditional training that didn’t changed much for decades. Therefore, new alternative training concepts have been developed that cover these needs. However, these concepts do not apply to initial training which seem to be a crucial phase of a pilot training. Thus, the aim was to create a software solution that would identify individual flight maneuvers and evaluate them so that the overall evaluation would be done by considering objective evaluation and flight instructors’ subjective expertise. A study was done with strictly given flight schedules. For the purpose of automatic maneuver detection, density-based spatial clustering of applications with noise – DBSCAN clustering algorithm was used, which could determine maneuvers and thus exclude the noise from clusters of maneuvers. The results indicate that the proposed solution was able to identify the prescribed maneuvers with high sensitivity. The solution could be extended in the future to identify all flight maneuvers considering as many parameters from flight data recorder as possible and thus carry out complete objectively based pilot performance evaluation.

DOI:

10.1109/NTAD.2018.8551680

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Andrej Lališ, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Jakub Kraus, Ph.D.; doc. Ing. Ivan Nagy, CSc.; Licu, A.

Publikováno:

2018, IEEE Aerospace Conference Proceedings, IEEE Xplore), p. 1-8), ISBN 978-1-5386-2014-4, ISSN 1095-323X

Anotace:

This paper deals with safety performance predictions in the aviation, which address the long-term global efforts to achieve predictive risk management by the year 2028. Predictive risk management regards timely and accurate detection of risk, well before some incident or accident takes place so that effective control actions can be provided. To assure achieving such diagnosis, it is necessary that mathematically well-founded predictions will become part of existing safety management systems with the capability to predict key performance indicators. From current safety metrics and with respect to the data available in the aviation, overall safety performance was selected as suitable candidate for predictions. To obtain the performance signal, Aerospace Performance Factor methodology was utilized. Due to confidentiality restrictions with regard to aviation safety data, this study relies on public data sets from the domain of European Air Traffic Management. Dedicated resampling method was used to fill in the gaps of real data sets by transforming expert knowledge into mathematical functions. This enabled the possibility to build and test mathematical models for predicting safety performance. Because the identified data sources included some data, which are not necessary for computing safety performance but relevant in its context, conditional forecasts were made possible. With respect to this, the goal of this paper was to research and evaluate possibilities for both conditional and unconditional forecasts in the context of future risk management. Time-series analysis of the computed safety performance was conducted using ordinary least squares and maximum likelihood estimation. Each of the methodology led to different mathematical model and different predictions. Specific aspects of each methodology were identified.

DOI:

10.1109/AERO.2018.8396648

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Socha, L.; Kaľavský, P.; Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2018, New Trends in Process Control and Production management, London, CRC Press), p. 471-476), ISBN 978-1-138-05885-9

Anotace:

Study of aviation accidents in general came to conclusion that aviation accidents are always caused by more than just a single factor. They are often caused by the combination of mistakes, which singe failure itself doesn't have to neccesarly cause the critical situation. As long as the crew is not able to break the chain of smaller mistakes by correct procedure, it can lead to exhaustion of physical resources able to solve more complicated mistakes, which in a long term can lead to a cathastrophe, human as well as financial losses. In these cases we talk about the failure of crew – incorrect management of human resources on board of a plane. Listed facts certainly show the decrease in number of incidents and increase in safety of flights could be achieved by better training of pilots. There are many areas which could lead to the improvement of this. They mainly include the increase in the technical knowledge among the crew, improvement of trained processes and procedures and in gaining more experience during the practical training of pilots. The improvement of practical training of pilots could be the key factor to the overall improvement in safety on board. In a relation to this it is very necessary to specify basic critical elements of the practical training. For this purpose we created a survey presented to the target group. The result of this survey shows over 66% of participants haven't noticed any effort from authorities to improve training processes of pilots (60 respondents) At the same time all participants of this survey agreed on the fact that its of essence to pay a lot of attention to this issue. Based on results its easy to say that introduction of new technologies and new processes during training of pilots and personal on board would increase the effectivnes of the training and the safety of flights, leading to the decrease in number of aviation incidents, meaning less financial and especially human losses.

DOI:

10.1201/9781315163963-86

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Stanislav Kušmírek, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Pereverzeva, A.; Průcha, J.; Socha, L.; Hanák, P.

Publikováno:

2018, TRANSPORT MEANS 2018 - PROCEEDINGS OF THE 22nd INTERNATIONAL SCIENTIFIC CONFERENCE, Kaunas, Kaunas University of Technology), p. 580-584), ISSN 1822-296X

Anotace:

At present, the concept of reaction time measurement is used as one of the methods of psychological testing. Its usage spectrum, however, covers rehabilitation medicine, neurosciences and similar. Available systems used to measure reaction time deal with complex reaction time, i.e. the time between generating the stimuli and respective reaction via effector. Typical limitation is the design of these devices, which usually fits specific application, but it is not reusable for other applications. The goal of this paper is to introduce concept of device measuring reaction time of both upper and lower limbs, to visual or acoustic stimuli. Design of the device allows for application independence, i.e. it is reusable for wide range of different applications. This independence is supported by open software platform, including base set of testing tasks. In case of measurement of upper limb reaction time, the device allows measurement of individual components of the reaction time, opening new capabilities for deeper understanding of human sensory systems with respect to the speed of reaction to external stimuli.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Zelinka, T.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2018, Vzdušný priestor pre všetkých a letecké navigačné služby 2018: Zborník z vedeckej konferencie, Košice, Letecká fakulta Technickej univerzity v Košiciach), p. 43-55), ISBN 978-80-553-2962-8

Anotace:

Článok sa zaoberá problematikou vedenia dokumentácie v údržbe. Poukazuje na požiadavky predpisov vo vedení riadenej dokumentácie a záznamov pri vykonávaní údržby leteckej techniky. Taktiež rozoberá problematiku zlyhania ľudského faktora v leteckej údržbe, čo môže byť príčinou alebo spolupôsobiacou príčinou vzniku leteckej nehody.

Typ:

Stať ve sborníku z lokální konf. česky

Autoři:

Průcha, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Sochová, V.; Ing. Lenka Hanáková, Ph.D.; Ing. Slobodan Stojić, Ph.D.

Publikováno:

2018, Journal of Healthcare Engineering, 2018, p. 1-8), ISSN 2040-2295

Anotace:

Nowadays, a high-induction magnetic stimulation is starting to be increasingly applied as a biophysical stimulation in the conservative treatment of the degenerative locomotor system diseases. These are mainly in correlation with the changes in soft tissue elasticity, which should be positively influenced by the flow-induced electrical currents of high current density during high-induction magnetic stimulation. This assumption was verified within the interventional and prospective study using the ultrasound elastography. The group consisted of 6 volunteers, whose elasticity of the patellar tendons was measured using the 2D shear-wave ultrasound elastography. The volunteers were then exposed to a 20-minute high-induction magnetic stimulation session with a frequency of 20 Hz, in 2 s package intervals, with a 5 s pause, and a induced electric current density of 100Am^-2 in the tendons area. A tendon tension was measured five times for all volunteers, where mean tension at the marked area of the tendon, as well as the highest point tension indicated by the Q-Box, was monitored. The measurement results show that high-induction magnetic stimulation has an influence on the patellar tendon tension change, which occurred in the case of all involved volunteers when the patellar tension was decreased.

DOI:

10.1155/2018/7172034

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Socha, L.; Vlček, Š.

Publikováno:

2018, New Trends in Process Control and Production management, London, CRC Press), p. 463-469), ISBN 978-1-138-05885-9

Anotace:

Flight simulators are recently becoming an important part of pilot training. The integration of flight simulators into aviators’ trainings marked a significant shift in pilot training methods. Nevertheless, flight simulators are still rarely used in initial pilot trainings, e.g. when obtaining personal pilot licence or ultralight pilot licence. The incorporation of simulation technologies into this kind of trainings has the potential of enhancing the acquisition of correct skills and procedures while increasing the number of flight hours, and potentially reducing training costs when compared to real flights. The major part of the submitted article therefore aims at the evaluation of efficiency of the use of flight simulators in practicing basic piloting techniques. Training progress of a sample of pilots undergoing a training at a flight simulator was examined in order to set an optimum training duration. The examined parameters were piloting precision and psychophysiological condition of pilots. In regard to the estimation of the optimum training duration, financial efficiency of the use of flight simulators was evaluated with the main emphasis on the so called 3E principle. The results show that an effective duration of pilot trainings using flight simulators is 11 training hours, with the major objective of acquiring basic piloting techniques. The results also suggest that increasing the requirements for initial pilot training by a mandatory flight simulator exercises as a part of the training would create business opportunity of operating such training devices. Based on the performed calculations it was concluded that pursuit of business of operating flight simulators may prove beneficial considering the economy, safety as well as the actual education.

DOI:

10.1201/9781315163963-85

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

Socha, L.; Hrivňáková, L.; Čekan, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Priganc, F.

Publikováno:

2018, Społeczeństwo i edukacja, 29 (2), p. 37-42), ISSN 1898-0171

Anotace:

The purpose of this research is to identify stress factors in flying personnel. The introduction of the article deals with the theoretical basis of the problem researched. In the following part the authors, using a questionnaire with a selected sample of pilots, investigate and identify stressors that affect their work and lives as well as stressors affecting their flight. Then they discuss the individual stress response factors and compare the results of the questionnaire with what is reported in the professional literature.

Typ:

Článek v odborném recenzovaném periodiku

Autoři:

doc. Ing. Andrej Lališ, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Křemen, P.; doc. Ing. Peter Vittek, Ph.D.; Socha, L.; doc. Ing. Jakub Kraus, Ph.D.

Publikováno:

2018, Safety Science, 106 (106), p. 154-161), ISSN 0925-7535

Anotace:

Aviation safety data are limited in availability due to their confidential nature. Some aggregated overviews already exist but in order to effectively use the data, it is important to fill the gaps of their existing limitations. For some data, there are not enough data points in order to process them through advanced analysis. For other, only expert assumptions can be obtained. In both cases, these shortcomings can be addressed via proper data resampling or simulation where little effort can make the data suitable for various research and development initiatives. Examples of real aviation safety data made public are demonstrated together with key principles of how to perform their resampling. Then, for cases where only expert assumptions are available, general solution to the transformation of the assumptions into simulated data is introduced. The goal is to demonstrate how to transform accessible data or knowledge about aviation safety into data samples with sufficient granularity. The results provide general solution suitable not only for aviation safety data and knowledge, but also for similar transportation or high-risk industries related data issues, indicating that both the data resampling and simulation provide an option for generating datasets, which can be used for statistical inferential methods, linear regression modelling, recurrent analysis etc. Example of data resampling application is included in Aerospace Performance Factor calculation for years 2008 up to 2015.

DOI:

10.1016/j.ssci.2018.03.013

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Kaľavský, P.; Rozenberg, R.; Petríček, P.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2018, Proceedings of New Trends in Aviation Development 2018. The XIII. International Scientific Conference, Prague, Czechoslovakia Section IEEE), p. 64-67), ISBN 978-1-5386-7918-0

Anotace:

This article deals with helicopter emergency medical services in Slovak Republic, Czech Republic, Poland and Hungary. The article analyses and gives a comparison of effectiveness of the helicopter emergency medical services (HEMS) in different countries in terms of the services response time. Some ideal allocation of the helicopter emergency medical services in Slovak Republic was proposed in the conclusion of the article.

DOI:

10.1109/NTAD.2018.8551634

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Mačej, M.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Hanák, P.; Ing. Lenka Hanáková, Ph.D.

Publikováno:

2018, TRANSPORT MEANS 2018 - PROCEEDINGS OF THE 22nd INTERNATIONAL SCIENTIFIC CONFERENCE, Kaunas, Kaunas University of Technology), p. 1379-1382), ISSN 1822-296X

Anotace:

The purpose of this article is to explain and evaluate the issue of Cost Index, a useful tool used by air carriers aiming to reduce fuel cost and reach effective time management. Individual chapters explain the essence of the abovementioned term, its mathematical expression and factors which have a direct impact and also an influence of the parameters on air operators' economy.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Falisová, T.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.

Publikováno:

2018, Vzdušný priestor pre všetkých a letecké navigačné služby 2018: Zborník z vedeckej konferencie, Košice, Letecká fakulta Technickej univerzity v Košiciach), p. 63-73), ISBN 978-80-553-2962-8

Anotace:

Článok zaoberá charakteristikou a popisom modelov excelentnosti využívaných nielen v Európe, ale aj vo svete (Malcolm Baldrige Award Mode, Singapore Quality Award Model, TQMEX model, Canadian Framework for Business Excellence, Australian Business Excellence Framework a European Foundation for Quality Management). Ďalej článok približuje možné využitie modelu EFQM v leteckom podniku.

Typ:

Stať ve sborníku z lokální konf. česky

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2018, ISBN 978-0-8153-7602-6

Typ:

Sborník z mezinár. konf.

Autoři:

Ing. Michaela Kalivodová; Ing. Sarah Van Den Bergh; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.

Publikováno:

2018, MAD - Magazine of Aviation Development, 6 (4), p. 12-18), ISSN 1805-7578

Anotace:

Due to increasing safety standards in air transport, the emphasis is put on human factors in this domain. This regards especially the improvement of piloting precision during flight training and the elimination of internal and external influences with negative effect on pilots. This paper is focused on evaluation of pilot’s psychophysiological state during flight training on a simulator and in an aircraft and also on pilot’s reaction on transfer from analogue to digital visual presentation of avionic data. The best indicator for evaluating human’s psychophysiological condition could be a heart rate because of its descriptive activity of human heart and its psychophysiological character based on sympathovagal balance of autonomic nervous system. In this paper heart rate frequency is measured by FlexiGuard biotelemetry mobile device and by a Garmin c chest belt. This paper is oriented towards description and comparison of the most common methods for physiological parameters assessment, i.e. time and frequency domain analysis and non-parametric methods analysis. The paper also describes a wavelet transform. The results show that not every parameter resulting from each analysis could be a good indicator describing pilot’s stress. Results also show which parameters might work as good indicators of pilot’s stress – those are LF/HF ratio and parameters measured by wavelet transform. Best way to define pilot’s stress on simulators in real time indicates to be wavelet.

Typ:

Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Socha, L.; Antoško, M.; Kozuba, J.

Publikováno:

2018, New Trends in Civil Aviation, Leiden, CRC Press/Balkema), p. 21-24), ISBN 978-0-8153-7602-6

Anotace:

Reaction time monitoring is currently routine in medicine and psychological practice. Monitoring of human reflexes concerning rapidly changing external visual stimuli in means of transport is one of the basic research activities in transportation sciences. These activities allow transfer of knowledge and innovations into practice. Human factors, especially in the aviation, can lead to significant fatalities. Selection of suitable candidates to perform such psychologically demanding occupation requires utilization of new testing tools and procedures. The basic idea to develop a device to measure reaction time was to offer suitable tool to physicians and research workers to explore human sensomotorics. The paper describes development of a new device to measure reaction time.

DOI:

10.1201/9781351238649-4

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Vaško, B.; Čekanová, A.; Ing. Lenka Hanáková, Ph.D.; Hanák, P.; doc. Ing. Jakub Kraus, Ph.D.

Publikováno:

2018, Proceedings of New Trends in Aviation Development 2018. The XIII. International Scientific Conference, Prague, Czechoslovakia Section IEEE), p. 137-143), ISBN 978-1-5386-7918-0

Anotace:

The article deals with the issue of risk management and opportunities in the context of the ISO 31000 standard. The methodology of applying the requirements of the standard in question is applied to the aircraft handling process. As a result, on the basis of the defined process, the creation of a register of stakeholders, a register of internal and external impacts, and a register of risks and opportunities. This process applied to the aircraft clearance process can be devoted to any process in accordance with the organization's requirements for applying risk management and opportunities.

DOI:

10.1109/NTAD.2018.8551753

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Vladimír Plos, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.

Publikováno:

2018, ISBN 978-80-904317-5-1

Typ:

Sborník z mezinár. konf. cizojazyčně

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Jakub Kraus, Ph.D.; Ing. Sarah Van Den Bergh; Hůlek, D.

Publikováno:

2018, Young Transportation Engineers Conference 2018, Praha, Fakulta dopravní), ISBN 978-80-01-06464-1

Anotace:

One of the priority tasks of contemporary security systems is to eliminate risks of unlawful acts related to terrorist attacks on critical infrastructure. Airports, among other things, are part of this infrastructure. Pre-screening of passenger’s baggage chemical composition during entrance into an airport hall, with no need for slowing down of passenger flow or raising suspicion in potential perpetrator of unlawful act during the check process, could eliminate number of casualties of such attacks. Traces of ammonia present in almost every type of explosives provide one of the possibilities to separate suspicious baggage and persons from the rest of passengers. The goal of this work is thus creation of a sensory network concept capable of 2D monitoring or localization of the ammonia traces source in space. Such system could find its application also in rail or bus transportation.

Typ:

Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:

Hanak, P.; Socha, L.; Tobisová, A.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Mako, S.

Publikováno:

2018, TRANSPORT MEANS 2018 - PROCEEDINGS OF THE 22nd INTERNATIONAL SCIENTIFIC CONFERENCE, Kaunas, Kaunas University of Technology), p. 347-350), ISSN 1822-296X

Anotace:

Pricing is one of the key areas of business activity that helps survive companies with the best profit or with the lowest possible losses. From the customer's point of view, the development of prices affects his shopping habits. The price of the product is considered to be the most important factor that affects sales. The aim of the article “The analysis of the price trend of low-cost carriers in Slovakia” is to find out the time impact on the prices of selected low-cost airlines Wizzair and Ryanair operating on the Slovak market.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Duman, D.; Socha, L.

Publikováno:

2018, New Trends in Civil Aviation, Leiden, CRC Press/Balkema), p. 261-266), ISBN 978-0-8153-7602-6

Anotace:

In practice, inexperienced pilots tend to excessively manipulate the aircraft control stick when attempting to direct an aircraft into a desired attitude. This causes piloting inaccuracies, which may lead to undesired flight situations. The objective of this paper was to identify the relationship between accuracy, or more precisely piloting error rate, and the physical activity of the pilot’s upper limb. Effort was also made to prove the fact that inaccurate upper limb input can be detected by means of values measured by an accelerometer. The evaluation was performed with 10 subjects during flight training with the main focus on evaluating the error rate during execution of climbing and descent 180° turn. The measurements were made on TRD40 flight simulator, evaluated by the proposed methodology of processing accelerometer data, and subsequently compared with real error rates calculated from flight data. The results confirmed a correlation between error rates inferred from flight data and error rates determined based on the accelerometer data. Because the research conducted in the domain is a pilot study, the results provide opportunities for discussion and possibilities of further research.

DOI:

10.1201/9781351238649-44

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Fábry, L.; Rozenberg, R.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2018, New Trends in Process Control and Production management, London, CRC Press), p. 125-129), ISBN 978-1-138-05885-9

Anotace:

The article discusses an environment and lifestyle impact on activities of air traffic controllers (ATC), the possibilities to observe their performance and focuses on their verbal expressions during work activities. The results of air traffic controllers' verbal communication gained and evaluated, recorded in air traffic procedural and radar control training, point to a possible relationship between stress, fatigue, limited ability to perform a controlling activity on one side and verbal expression characterized by variations in the rare, volume, color or delay responses to impulses on the other. The discovery of this dependence opens up the possibilities to look at the hypothetical solution of non-invasive, non-contact observing their skills and limitations in direct activities by monitoring their main working tool - own voice.

DOI:

10.1201/9781315163963-26

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

Milistenferová, E.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Tobisová, A.

Publikováno:

2017, MAD - Magazine of Aviation Development, 5 (3), p. 18-23), ISSN 1805-7578

Anotace:

The article deals with the issue of educating managers. The first part of the article discusses the requirements for managers skills, managerial competencies, a successful manager profile, and the importance of manager training. The second part of the article evaluates the questionnaire survey conducted at VSE Holding a.s. Focused on the effectiveness of the education of company managers. Based on the survey, individual areas of company manager education are proposed within the programs.

DOI:

10.14311/MAD.2017.03.03

Typ:

Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:

Středová, M.; Sorfova, M.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.

Publikováno:

2017, Lékař a technika, 47 (1), p. 19-22), ISSN 0301-5491

Anotace:

The aim of the work is to elucidate if there is a significant difference between the ability to maintain balance with or without the biofeedback while standing and identify specific segments that takes place of motion solutions of postural problems. We measured postural parameters using 6 tri-axial accelerometers placed in 6 places: 2× lower leg, 2× thigh, processus spinosus vertebrae L5 and C7. Probands absolved 3 postural tasks and 3 dynamic tasks. Postural: quiet standing with feet apart with eyes open, quiet standing with feet together with eye closed, quiet standing with feet apart with eyes open and with visual biofeedback. We used system Homebalance-interactive system for providing of balance training with visual biofeedback. Results show no significant difference between C7 and L5 for task without VBF (visual biofeedback) and with VBF, but SD VPG (sum of scatter of the acceleration) for thigh and ankle show significant difference between each task on every level. We detected that in open eyes majority of probands used anklestrategy for maintaining balance. In eyes closed they preferred knee and hip strategy. The biggest accelerations were detected in C7 in eyes closed. Due to visual biofeedback patients are more motivated and they improve their skills faster than without visual biofeedback exercise. Strategy of maintaining balance during tasks with open eyes and eyes closed is different.

Typ:

Článek v periodiku excerpovaném databází Scopus cizojaz.

Autoři:

Socha, L.; Horňák, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Čekanová, A.; Hanák, P.

Publikováno:

2017, Proceedings of International Scientific Conference Modern Safety Technologies in Transportation, Košice, Faculty of Aeronautics Technical University Kosice), p. 159-167), ISBN 978-80-553-2864-5

Anotace:

The article deals with the issue of obtaining biometric data to identify individuals who may pose a risk and potential threat to air transport. It characterizes individual methods of obtaining biometric data, using biometric systems, evaluates their advantages and disadvantages. At the same time, based on a questionnaire survey, it analyzes and assesses passengers' attitudes towards the use of biometric data within security screening in a passenger handling process.

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Szabo, S.; Kozuba, J.; doc. Ing. Andrej Lališ, Ph.D.; doc. Ing. Peter Vittek, Ph.D.; doc. Ing. Jakub Kraus, Ph.D.; Rozenberg, R.; Kalavský, P.; Ing. Martin Novák, Ph.D.; Schlenker, J.; Ing. Stanislav Kušmírek, Ph.D.

Publikováno:

2017, Proceedings of the 2017 International Conference on Military Technologies (ICMT), Brno, Ministerstvo obrany, Univerzita obrany), p. 500-506), ISBN 978-1-5386-1988-9

Anotace:

At present, several studies exist describing the relevance of human factor in air transport with main focus on pilots and flight safety. Within such studies, monitoring of physiological functions is used. There are lot of physiological parameters and methods of their assessment; however, they are mostly based on principles originating from clinical practice. Yet, sensitivity and specificity of these methods with regard to assessment of aviation professionals - pilots is unknown. Therefore, this paper is oriented towards description of the most common methods for physiological parameters assessment. The paper also describes evaluation methods, which are on experimental level in terms of physiological data evaluation, namely recurrent quantification analysis. Within the research carried out, sample group of pilots was subjected to measurement for evaluation of their psychophysiological condition and performance. Selected evaluation methods were applied on the collected data and importance of those parameters and methods, which provided best classification for level of psychophysiological stress, was evaluated by means of statistical analyses. The results indicate that the most important physiological parameter for psychophysiological condition assessment of pilots is heart electrical activity where the possibility to perform signal processing whilst preserving its importance is provided by linear methods in the time and frequency domain, or alternatively by non-linear methods utilizing recurrent quantification analysis.

DOI:

10.1109/MILTECHS.2017.7988810

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Čapek, F.; Průcha, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Hart, V.; Burda, H.

Publikováno:

2017, Folia Zoologica, 66 (3), p. 175-182), ISSN 0139-7893

Anotace:

Magnetoreception has been widely studied in birds mainly through the paradigm of homing or seasonally appropriate migratory direction. It was found that in total darkness or under selected light regimes (differing in colour and/or intensities), migratory birds display orientation towards certain “fixed” directions which do not correspond to the migratory or homing direction. This “fixedorientation” might correspond to the so-called magnetic alignment recorded in animals of different non-avian taxa. Here we demonstrate that also “common”, non-migratory birds, pheasants, adopt a preferred position and body orientation when drinking at a circular dish. We recorded these parameters by means of camera traps in a pheasantry under control conditions and under experimental exposure to bright blue light. We identified three types of orientation at the edge of drinking dish: standing radially or tangentially with left or right eye to the dish. The position of tangentially drinking chicks was significantly non-random. While the position of radially drinking chicks was random under control conditions, it became significantly non-random, concentrated at about the north and south pole of the dish, under bright blue light. Our results show that this alignment has some similarities with the “fixed orientation”. We suggest that the preference towards a “fixed” direction serves to calibration, organization and reading of the mental (cognitive) map of the space and as a direction indicator. We discuss heuristic potential of the presented research (experimental and evaluation) design for further study on magnetoreception.

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Hajdu, P.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.

Publikováno:

2017, Acta Avionica, 19 (1), ISSN 1335-9479

Anotace:

The article deals with the issue of communication types, their knowledge and their importance in aviation as well as in other parts of life. All people react to outer circumstances in a different way. At the same time, we all do not communicate in the same way, because our inner life is different too. Based on that, at the Faculty of Aviation we were investigating the dominance of communication types by means of a questionnaire survey, in the scope of the study programmes Professional pilot, Air traffic controller and Air traffic management. The questionnaire was designed to identify the dominant communication type of the studied individual. Four types of dominant communication types were compared across selected study fields, i.e. emotional, rational, acoustic and visual. The results show that a rational communication type prevails in the group of students of professional pilot and air traffic control field.

Typ:

Článek v odborném recenzovaném periodiku

Autoři:

Kalavský, P.; Rozenberg, R.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Gazda, J.; Kimličková, M.

Publikováno:

2017, MAD - Magazine of Aviation Development, 5 (2), p. 25-30), ISSN 1805-7578

Anotace:

The article is devoted to the development of the methodology of measuring pilot performance under real flight conditions. It provides the basic information on a research project realized to obtain new information regarding training and education of pilots. The introduction is focused on the analytical part of the project and the outputs in terms of the current state of the art. Detailed view is cast on the issue of measuring pilot performance under specific conditions of the cockpit or the flight simulator. The article is zooming in on the two selected and developed methods of pilot performance in terms of the defined indicators evaluated, conditions of compliance for conducting research and procedures of the methodology of pilot performance measurements.

DOI:

10.14311/MAD.2017.02.04

Typ:

Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:

Kutílek, P.; Mareš, J.; Hýbl, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Schlenker, J.; Štefek, A.

Publikováno:

2017, Neural Computing and Applications, 28 (2), p. 419-427), ISSN 0941-0643

Anotace:

Today’s multiple degree-of-freedom myoelectric prosthesis relies only on direct control by the processed electromyographic signal. However, it is difficult for the wearer to learn unnatural muscle contractions in order to wield more than three DoFs of the arm. This makes it almost impossible to use more complex prostheses with a larger number of actuators. Methods based on sensor–actuator loop and artificial intelligence may reduce cognitive load of the user by removing low level control, and an intelligent control system would make it needless to micromanage every action. For this purpose, sensor system for body segments motion capture was developed, as well as sensor system for prosthetic limb’s environment motion capture. Neural networks were designed to process data from the sensor systems. For the identification of the knee angle, orientation trackers were used. Neural network predictor of arm positions predicts the shoulder angle using the information about movement of the lower limb. In the case of the periodic/cyclic movements of the legs, such as walking, the control unit uses typical movement patterns of the healthy upper limb. Ultrasonic range sensors are used to create 3D map of objects in the environment around the arm. Neural network predictor of object positions predicts collisions. If the potential collisions are identified, the control unit stops arm movement. The new methods were verified by MATLAB and are designed as a part of assistive technology for disabled people and are to be understood as an original contribution to the investigation of new prosthesis control units and international debate on the design of new myoelectric prostheses.

DOI:

10.1007/s00521-015-2074-x

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Čekan, P.; Čekanová, D.; Ing. Lenka Hanáková, Ph.D.; Puškáš, T.

Publikováno:

2017, MAD - Magazine of Aviation Development, 5 (1), p. 12-16), ISSN 1805-7578

Anotace:

The problem of environmental load is also reflected in air transport. Usage of fossil fuels, which are dominant nowadays, has a negative impact on the environment and also its resources are limited. Therefore, the article focuses on the prospective of use of other energy sources in aviation, such as alternative fuels (synthetic fuels, biofuels, alcohol, methane, hydrogen), solar energy and the use of fuel cells. Also, the paper briefly summarizes the approach of aircraft manufacturers to the use alternative sources.

DOI:

10.14311/MAD.2017.01.02

Typ:

Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:

Zgodavová, Z.; Rózenberg, R.; Szabo, S.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Němec, V.

Publikováno:

2017, Central European Conference in Finance and Economics (CEFE2017), Košice, Technická univerzita v Košiciach, Ekonomická fakulta), p. 882-887), ISBN 978-80-553-2906-2

Anotace:

The aim of the article is to highlight the issue of human factor and topicality of risks arising from the analysis of aviation accidents and recently conducted surveys. Despite the fact that human being is the most important, most adaptable and most effective element of the system, contributes to a high proportion of air accident. The average significantly exceeds the pilot‘s profession, as the most error-prone component. Fatigue that occurs in crews has recently become major factor endangering the safety of flight operation. Effects of fatigue not only disturb the functions of the human body, but they greatly influence pilot’s performance during the flight, as confirmed by measurement results.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Andrej Lališ, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Peter Vittek, Ph.D.; Ing. Slobodan Stojić, Ph.D.

Publikováno:

2017, Proceedings of the 2017 International Conference on Military Technologies (ICMT), Brno, Ministerstvo obrany, Univerzita obrany), p. 392-396), ISBN 978-1-5386-1988-9

Anotace:

This paper deals with research of safety performance predictions to allow improved risk control in military. Safety performance is identified as appropriate tool to establish system-wide information on safety which can serve the decision making process on how to manage safety. The information contributes to better understanding of behavioural patterns in the controlled system and the ability to foresee short-term future can provide key elements for justification of remedial measures. Aviation safety data served the research due to confidentiality restrictions in military. Data deficiencies were addressed by the means of developed simulator. Suitable mathematical models were identified and autoregressive model was selected and applied to predict computed safety performance. At the end, it was possible to validate the model. Remarks on its potential application into real military environment conclude this work.

DOI:

10.1109/MILTECHS.2017.7988791

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Kaľavský, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Socha, L.; Rozenberg, R.

Publikováno:

2017, Proceedings of the 2017 International Conference on Military Technologies (ICMT), Brno, Ministerstvo obrany, Univerzita obrany), p. 625-631), ISBN 978-1-5386-1988-9

Anotace:

This paper deals with functionality verification of satellite navigation system GPS-150 before its application for air traffic. The goal of this project was to verify GPS-150 properties with regard to its fundamental functionality – provision of navigation information during flight. Within the research, the main focused was placed on GPS-150 operation during specific flight conditions with acrobatic elements. Another goal of the project was to obtain complementary operational information, which were not included in user’s handbook. For this purpose, ground-based verification methodologies were developed. The project was concluded by flight tests.

DOI:

10.1109/MILTECHS.2017.7988833

Typ:

Stať ve sborníku z prestižní konf. (Scopus)

Autoři:

Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Vajdová, I.; Jambor, L.; Kimličková, M.

Publikováno:

2017, Aeronautica XVII, Lublin, University College of Enterprise and Administration in Lublin), p. 163-169), ISBN 978-83-60617-49-6

Anotace:

The article deals with measures that are adopted in air transport to eliminate the commission of unlawful acts. On the basis of incidents in individual time periods, it is shown what measures have been taken on a timely basis to reduce potential risks and threats. There are also trends in the application of new technologies and their prospective introduction to security controls in aviation to eliminate the commission of an illegal act. At the end of the article, the results of the questionnaire survey of passenger satisfaction with the measures taken in the field of aviation safety are analyzed.

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

Holubová, A.; Schlenker, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Mužík, J.; Gillar, D.; Doksanský, M.; Poláček, M.; Hána, K.; Kašpar, J.; Smrčka, P.

Publikováno:

2017, 2017 IEEE 15th International Symposium on Applied Machine Intelligence and Informatics (SAMI), Prague, Czechoslovakia Section IEEE), p. 235-240), ISBN 978-1-5090-5655-2

Anotace:

Mental disorders, such as schizophrenia, are accompanied by increased morbidity and mortality rates, potentially reducing the lifespan of patients by up to 10 years. Premature deaths in schizophrenia sufferers are caused mainly by cardiovascular diseases and complications related to excessive weight gain and type 2 diabetes mellitus. Gaining weight is, furthermore, often a side effect of medicine prescribed for the treatment of schizophrenia. This is why treatment protocols are putting a greater emphasis on healthy lifestyle and exercise for patients, which may support both weight loss and suppress feelings of anxiety. It is, therefore, important for a doctor to monitor the exercise habits of their patients. This article focuses on telemonitoring of physical activity and other biological parameters in patients with mental disorders, such as schizophrenia, using the recent m-Health technology in the form of a Fitbit Flex activity tracker. The Soma web portal has been created to continuously monitor, visualize and analyse the data measured on patients within the scope of research activities.

DOI:

10.1109/SAMI.2017.7880310

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Kliment, R.; Smrčka, P.; Hána, K.; Schlenker, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Luboš Socha, Ph.D. et Ph.D.; Kutílek, P.

Publikováno:

2017, Journal of Sensors, 2017, ISSN 1687-725X

Anotace:

The article summarizes the development of the FlexiGuard modular telemetry system designed for enhancing safety of the Integrated Rescue System team members in solving crisis situations and for improving training processes. Further framework solutions, which lead to the development of automaticmodular telemetry systemallowing for real timemonitoring of physiological parameters, are provided as well. The system provides for the signalization of critical states such as exhaustion, mental stress, and overheating. It further provides differentiation between the nature and intensity of movement, including actual and overall energy output, monitoring environmental parameters, and analysis of an intervention or training. The system has been tested in laboratories as well as in the terrain under real circumstances, and the eventual end users participated in its optimization process. Following the theory of games, amodel of a transmission systemwas also createdwhich demonstrates higher transmission efficiency when using higher number of nodes.

DOI:

10.1155/2017/9034253

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Koblen, I.; Ing. Stanislav Kušmírek, Ph.D.; Mrázek, P.; Soušek, R.; Schlenker, J.

Publikováno:

2016, International Review of Aerospace Engineering, 9 (5), p. 162-172), ISSN 1973-7459

Anotace:

Flight simulator utilization for basic types of pilot training is restricted by regulations. Flight simulators could contribute to improvements of training quality, especially for initial training to obtain pilot license and, last but not least, to increase flight safety. The goal of this study was to evaluate flight simulator usability for basic piloting technique training. For this purpose, piloting error rate for 35 subjects was evaluated. Within prescribed, continuous flight simulator training consisting of 11 flight hours, progress in piloting precision was monitored during four different manoeuvers. The paper further evaluates influence of the transition between simulated and real flights with regard to progress or regress of executed manoeuvers precision. The results indicate, that during basic pilot techniques training on flight simulator, continuous and statistically significant decrease of error rate during standard manoeuvers execution is achieved. For acquisition of the habits related to mastering basic piloting techniques, the current possibility to use 5 training hours on flight simulator is insufficient. Habits acquisition is noticeable first during 11th flight simulator hour. The study also indicates that the acquired flight simulator habits related to piloting precision applying basic piloting techniques are not observable during the transition to real flights.

DOI:

10.15866/irease.v9i5.10749

Typ:

Článek v periodiku excerpovaném databází Scopus

Autoři:

Rozenberg, R.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Szabo, S.; Němec, V.

Publikováno:

2016, Proceedings of 20th International Conference Transport Means 2016, Kaunas, Kauno technologijos universitetas), p. 444-449), ISSN 1822-296X

Anotace:

Human factor is the most important factor in aviation. Interaction between the pilot, flying equipment and the environment in acrobatic groups is exactly where human factor plays key role. In group flying experience, piloting skills are crucial for creating new combinations of acrobatic elements, which then are the main aspect of safe performance of the acrobatic group as a whole. The articles examines flight accidents of selected acrobatic groups from the point of view of pilots` errors, flying equipment malfunction and other causes of flight accidents. It then analyses aspects of piloting techniques in acrobatic groups’ experience considering their difficulty and demands on pilots. The work describes the cooperation among the acrobatic group members to manage the most demanding elements of piloting technique in the display team. It sets the most difficult aspects of piloting technique of group experience which acrobatic group`s performance have to focus on.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Štefek, A.; Socha, L.; Schlenker, J.; Hána, K.

Publikováno:

2016, Acta Polytechnica Hungarica, 13 (4), p. 141-157), ISSN 1785-8860

Anotace:

The paper describes behavior of a cognitive control system model, which enables a hexapod to walk in an obstacle-free terrain as well as in a complex terrain including obstacles. This cognitive system model is based on reinforcement learning and assumes the concept of static-stable walking. The decision making process was tested using three different types of terrain models. The results of decision making process trigger actions in the form of changes in the state of six-legged body to maintain stable walking forward. New method have been developed to describe a group of obstacles of different sizes in a complex terrain. The results suggest a relationship between the predefined number of actions and the maximum total walked distance in terrain. In case of the terrain without obstacles, the optimized actions are the same. Thus, the way of moving the trunk and legs in the terrain is always the same and cyclic. The results also indicate that the maximum total walked distance is reduced due to a growing number of obstacles to overcome. The maximum total walked distance is reduced more significantly in the case of overcoming a greater number of small obstacles compared the case of smaller number of large obstacles. The way of moving the trunk and legs in the terrain with large obstacles is acyclic. The methods proposed for the study of the cognitive system and the sensory system of a hexapod, for the simulation of six-legged walking, as well as for the characterization of terrain with obstacles may find application in bioengineering, robotics, military system and other fields. © 2016, Budapest Tech Polytechnical Institution.

DOI:

10.12700/APH.13.4.2016.4.9

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Schlenker, J.; Hána, K.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Mihalcova, B.; Smrčka, P.; Hůlek, D.

Publikováno:

2016, Proceedings of 20th International Conference Transport Means 2016, Kaunas, Kauno technologijos universitetas), p. 428-434), ISSN 1822-296X

Anotace:

Psychological discomfort or increased stress can negatively influence performing specific activities mainly concerning professions which are responsible for human lives. Such group of professionals includes aviation specialists, especially pilots. Psychophysiological state is indicated by certain physiological parameters by means of which it is possible to describe it. There is a wide range of methods for signal processing of measured physiological parameters which are, however, based on linear methods. This paper deals with application of non-linear method, the so-called recurrence quantification analysis for evaluation of psychophysiological state of pilots. For this purpose, R-R interval recording of pilots in training was conducted by the means of wearable telemetric system. Research sample consisted of 35 beginner pilots and measurements were performed during both simulated and real flights. Measured signal processing was done using standard time-series analysis (Mean R-R and SDNN) and also using recurrence quantification analysis. The results indicate that both standard and recurrence quantification analysis parameters were able to distinguish between two groups of measurements (simulated vs. real flights) at the significance level of p<0.05. Apart from that, the results indicate considerable increase of heart rate frequency and decrease in its variability during real flights.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Mihalčová, B.; Socha, L.; Gontkovičová, B.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2016, ISBN 978-83-946020-0-0

Anotace:

This scientific monograph deals with actual trends in marketing management. It contains 10 consistent chapters comprising global market trends, marketing mix up to multi-level marketing. The publication is an output from VEGA 1/0708/14 project and it is intended for marketing management students, related subjects, scientific community as well as professionals engaged with marketing management issues in practice.

Typ:

Vědecká kniha

Autoři:

Vajdová, I.; Szabo, S.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2016, New Trends in Civil Aviation 2016, Žilina, Žilinská univerzita v Žilině Fakulta prevádzky a ekonomiky dopravy a spojov), p. 108-111), ISBN 978-80-554-1252-8

Anotace:

The article deals with the evaluation of the average heart rate of pilots - students as an indicator of psychophysiological stress. The article in its first part deals with theoretical basis psychophysiological evaluation factors and subsequent attention is devoted to the methodology and evaluation to measurement of the average heart rate. Based on the results of measurement has been optimized time horizon for initial pilot training to obtain license PPL(A), which is currently authorized number of hours of flight simulator in the range of five hours.

Typ:

Stať ve sborníku z mezinár. konf. česky

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Szabo, S.

Publikováno:

2016

Anotace:

Predkladaná dizertačná práca sa zaoberá teoretickými východiskami hodnotenia výkonnosti a záťaže u leteckých špecialistov. Práca popisuje význam ľudského faktora v leteckej doprave a sumarizuje jeho vplyv na bezpečnosť letovej prevádzky. Analýza súčasného stavu problematiky merania a hodnotenia výkonnosti ukázala, že hodnotenie výkonnosti leteckých špecialistov sa primárne zakladá na sledovaní ich fyziologických funkcií. Analýza taktiež preukázala, že existuje veľké množstvo metód hodnotenia fyziologických parametrov, ktoré sú väčšinou založené na princípoch pochádzajúcich z klinickej praxe. Doposiaľ však nie je známa senzitivita a špecificita týchto metód vzhľadom k hodnoteniu výkonnosti u leteckých špecialistov. Na základe vyššie uvedeného sa práca orientovala na popis najbežnejších metód hodnotenia fyziologických parametrov. Predkladaná práca taktiež popisuje hodnotiace metódy, ktoré sú pre hodnotenie fyziologických dát v súčasnosti na experimentálnej úrovni, konkrétne sa jedná o rekurentnú analýzu. V rámci realizácie výskumu boli vykonané merania u skupiny pilotov, za účelom hodnotenia ich psychofyziologickej záťaže a výkonnosti. Na zozbierané dáta boli aplikované vybrané metódy hodnotenia a pomocou štatistických analýz bola vyhodnotená importancia tých parametrov a metód, ktoré najlepšie klasifikujú úroveň psychofyziologickej záťaže.

Typ:

Disertační práce (PhD)

Autoři:

Ing. Stanislav Kušmírek, Ph.D.; Hána, K.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Průcha, J.; Kutílek, P.; Svoboda, Z.

Publikováno:

2016, European Journal of Physiotherapy, 18 (4), p. 237-244), ISSN 2167-9169

Anotace:

The main tools for measuring postural instability of the body during quiet stance are stabilometric platforms. Frequency domain analysis of center of pressure excursions is used for detecting and quantifying specific diseases. The disadvantage of such platforms is their higher price and large dimensions. The main aim of this work was to identify the applicability of the frequency domain analysis of the trunk acceleration measured by one-axis accelerometer. In order to test the new technique, 10 patients with degenerative cerebellar ataxia and 11 healthy subjects were chosen to participate. The trunk acceleration of each subject with opened/closed eyes was measured during quiet stance on a firm/foam surface. The distribution of the power spectral density in the frequency spectrum of acceleration in the anterior–posterior direction is a suitable tool for quantifying postural instability. The percentages of the area under the power spectral density curve of middle frequency range (2.4–3.5 Hz) of acceleration in patients and healthy subjects were compared, and significant differences were found. The finding of our research is that a single cheap one-axis accelerometer placed on trunk to measure the acceleration in AP direction, together with the method based on the power spectral density of acceleration, could be a new tool for examinations of body instability.

DOI:

10.1080/21679169.2016.1211174

Typ:

Článek v periodiku excerpovaném databází Scopus

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Schlenker, J.; Hána, K.; Smrčka, P.; Ing. Lenka Hanáková, Ph.D.; Průcha, J.; Szabo, S.; Riedlbauchova, L.; Vojtová, V.

Publikováno:

2016, Proceedings on 39th International Conference on Telecommunications and Signal Processing, Brno, Brno University of Technology), p. 365-369), ISBN 978-1-5090-1288-6, ISSN 1805-5435

Anotace:

Atrial fibrillation ranks among the most common heart rhythm disorders. Considering the lack of any trusted method capable of foreseeing possible recurrence of atrial fibrillation after it has been terminated, nonlinear analyses of beat-tobeat heart rate variability demonstrate promising potential. This work focuses on verifying the capability of the nonlinear methods to differentiate patients with early recurrence of atrial fibrillation from those with stable normal sinus rhythm after cardioversion. Both patients groups underwent the active-standing test involving ECG measurement. Recurrence quantification analysis was used to evaluate sequences of intervals between two consecutive heart beats. The data were derived from body surface ECG signal. The results selected those parameters capable of identification of patient groups during the initial phase of the active-standing test prior to cardioversion.

DOI:

10.1109/TSP.2016.7760898

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Melecký, R.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Ing. Lenka Hanáková, Ph.D.; Takáč, P.; Schlenker, J.; Svoboda, Z.

Publikováno:

2016, Journal of Healthcare Engineering, 2016, ISSN 2040-2295

Anotace:

Techniques to quantify postural stability usually rely on the evaluation of only two variables, that is, two coordinates of COP. However, by using three variables, that is, three components of acceleration vector, it is possible to describe human movement more precisely. For this purpose, a single three-axis accelerometer was used, making it possible to evaluate 3D movement by use of a novel method, convex polyhedron (CP), together with a traditional method, based on area of the confidence ellipse (ACE). Ten patients (Pts) with cerebellar ataxia and eleven healthy individuals of control group (CG) participated in the study. The results show a significant increase of volume of the CP (CPV) in Pts or CG standing on foam surface with eyes open (EO) and eyes closed (EC) after the EC phase. Significant difference between Pts and CG was found in all cases as well. Correlation coefficient indicates strong correlation between the CPV and ACE in most cases of patient examinations, thus confirming the possibility of quantification of postural instability by the introduced method of CPV.

DOI:

10.1155/2016/1621562

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Schlenker, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Riedlbauchová, L.; Nedělka, T.; Schlenker, A.; Potočková, V.; Malá, Š.; Kutílek, P.

Publikováno:

2016, Biomedical Signal Processing and Control, 25, p. 1-11), ISSN 1746-8094

Anotace:

Currently, heart rate variability (HRV) is commonly evaluated using time and frequency domain analysis in the clinical practice. Due to the fact that cardiovascular system is regulated by the autonomic nervous system (ANS) that also influences HRV, however exhibits rather non-linear behaviour, it appears more appropriate to apply non-linear methods to evaluate functioning of ANS. This study presents recurrence analysis as a tool to test the presence of ANS dysfunction that is responsible i.e. for orthostatic (vasovagal) syncope by which abnormal HRV has been demonstrated in the past. Study included 18 patients that experienced vasovagal syncope (mean age 23.7 ± 5.2 years) and 18 healthy subjects (mean age 24.5 ± 3.2, p = 0.85). In all tested subjects, ECG recording was performed during active orthostatic test that comprised two phases (5 minutes of resting in a supine position and 5 minutes of active standing). Sequence of R-R intervals (time intervals between two consecutive heart beats derived from ECG) was analysed using standard time (mean RR, mean HR, SDNN, SDHR, RMSSD, NN50 and pNN50) and frequency domain (LF, HF and LF/HF ratio) analysis. Moreover, recurrence analysis was performed (RATIO, DIV, AVDL, MAXV, DET, ENTR, LMAX, TT and LAM). Frequency domain analysis did not demonstrate significant difference between the two groups in any of the parameters during both phases of the test. On the contrary, both time domain analysis and recurrence analysisshowed comparable findings in both groups during resting phase of the orthostatic test with a significant change of most tested parameters after stand-up. As the use of time domain HRV may be perceived as problematic regarding their interpretation in short ECG recordings, recurrence analysis appears to be a sensitive tool for detecting ANS dysfunction in patients with vasovagal syncope.

DOI:

10.1016/j.bspc.2015.10.007

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Socha, L.; Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; doc. Ing. Andrej Lališ, Ph.D.; Rozenberg, R.; Hána, K.

Publikováno:

2016, MAD - Magazine of Aviation Development, 4 (20), p. 33-37), ISSN 1805-7578

Anotace:

Air transport development brings an increased focus on the safety of piloting. The safety conditions can be assessed by mental workload. Psychic discomfort or excessive stress on pilots can negatively influence the course of flights. Therefore it appears convenient to monitor such parameters, which represent the mental wellbeing, or discomfort of a pilot. Since physiological measurements can provide a good information about mental workload or stress, this work primarily focuses on the observation of the change in heart rate, as it is an indicator of stress during the training of pilots, using the designed modular telemetry system. Another aim of this study is to evaluate the influence of a change in the avionic data visualization. This can have an unfavorable effect on the piloting of an airplane. This work, based on the evaluation of heart rate shows, that the switch from analog visualization to glass cockpit creates increased levels of stress in pilots, which was proved for all examined subjects except one. Significant level of correlation in the heart beat rate change in subjects in the course of training was also discovered.

DOI:

10.14311/MAD.2016.20.06

Typ:

Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:

Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Mihalčová, B.

Publikováno:

2016, Conference Proceedings of the 4th International Scientific Conference „Marketing Management, Trade, Financial and Social Aspects of Business“, Košice, Podnikovohospodráska fakulta so sídlom v Košiciach, EU v Bratislave), p. 218-226), ISBN 978-80-225-4293-7

Anotace:

The paper deals with the issue of network marketing. It discusses the historical aspects of its origin and briefly characterizes its development. Article refers to systems, e.g. Ponzi scheme that exploited the idea of network marketing and negatively affected its expansion. The examples shown how network marketing could be used in business. Article also discuss the ethical level of the use of network marketing in business.

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Szabo, S.; Hána, K.; Gazda, J.; Kimličková, M.; Vajdová, I.; Maďorán, A.; Ing. Lenka Hanáková, Ph.D.; Němec, V.; Puškáš, T.; Schlenker, J.; Rozenberg, R.

Publikováno:

2016, Proceedings of 20th International Conference Transport Means 2016, Kaunas, Kauno technologijos universitetas), p. 374-379), ISSN 1822-296X

Anotace:

One of the basic requirements to obtain pilot license is to demonstrate flying skills as to perform maneuvers and procedures with a required level of expertise. Considering the involvement of flight simulators in basic pilot trainings, one may ask how this impacts the extent of real flights necessary to acquire the required flying proficiency. This article focuses on the evaluation of precision (or error rate) of flight maneuvers performed over the course training of pilots. A sample of 35 student pilots was chosen for the study. Flight schedules and the training itself was adjusted for the purposes of this study, while the emphasis was put on the uniformity of flights and their conditions. Participants completed 11 flight hours on a flight simulator and one flight hour on the Diamond DA40 aircraft, followed by further three hours on a simulator and two flight hours in real traffic. The performed maneuvers included 180° climbing and descending turns with 30° bank at vertical velocity of 500 ft/min. During the flight hours, deviations from the requested flight parameters were recorded by the instructor. The results show that maneuver performance error ratio gradually decreases, however then significantly increases with the switch to the real aircraft compared to flight simulator, and again decreases during flights in air traffic. The findings suggest that the use of flight simulators as a tool for practicing flying skills appears reasonable, as well as that monitoring of performance precision may prove as a useful basis for adjusting the pilot training process.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Kutílek, P.; Čakrt, O.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Hána, K.

Publikováno:

2016, Journal of Mechanics in Medicine and Biology, 16 (2), p. 1-13), ISSN 0219-5194

Anotace:

Many disorders, such as nervous system disorders, can affect orientation of the body segments in 3D space negatively. Patients with these disorders often show body segments instability during stance tasks. Nowadays, 3-axis gyroscopes are about to be used to measure postural stability. The main objective of the paper is to describe a method which would be suitable for quantifying postural stability and 3D movement as a whole using a cheap 3-axis gyroscope. New method based on the volume of a 3D convex hull (CH) obtained by plotting pitch, roll and yaw angles versus each other was proposed for quantitative evaluation of 3D trunk sway. The sway was measured while patients with degenerative cerebellar disorder (Pts) and eleven healthy subjects (HSs) performed quiet stance on a firm surface (FiS) and foam surface (FoS) with open eyes (OE) and closed eyes (CE). The CH was used to identify differences in balance control, and there were significant differences found between the two groups. The median (Mdn) of the volume of Pts with OE on FiS is four times larger than the Mdn of the volume of HS with OE on FiS. The Mdn of the volume of Pts with CE on FoS is 80 times larger than the Mdn of the volume of HS with CE on FoS. It was therefore found that the volume of CH is suitable for quantifying postural sway and identifying differences in balance control.

DOI:

10.1142/S0219519416500135

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Heralová, D.; Kimličková, M.

Publikováno:

2015, ACTA SCIENTIFICA ACADEMIAE OSTROVIENSIS.SECTIO A, 2015 (5), p. 238-248), ISSN 2300-1739

Anotace:

The contribution is dealing with the issue of alternative fuels. It characterizes, alternative fuels and potentials of its use in air transportation with the aim reduce transportation signature on the living invironment. Further analysis is focuesed on using solar energy, fuel cells and the approaches of Airbus and Boeing and Airbus to the use of alternatice fuels and sources of energy in air transportation.

Typ:

Článek v odborném recenzovaném periodiku česky

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Schlenker, J.; Socha, L.; Szabo, S.; Cerny, R.; Begera, V.

Publikováno:

2015, 2015 International Conference on Applied Electronics, Plzeň, Západočeská univerzita), p. 215-220), ISBN 978-80-261-0385-1, ISSN 1803-7232

Anotace:

The work introduces a new means for quantification of dynamic stability and upper limb movement as a whole during gait. Swinging arms during gait performed by the experiment volunteers, as a cyclic motion, was quantified using two parameters AH (the convex hull area) and already known to the medical community - ROM (range of motion) revealed a potential use of the former in the scientific community. Looking at the results of the two parameters, even though ROM has shown to seem to be comparably instrumental as it yielded surprisingly rather identical results to the AH parameter (which yielded values of subjects walking at 5 km/h about twofold larger than those in volunteers walking at 3 km/h), it still fails to examine the pair of angles at the same time due to a strong interrelation of the observed joints in volunteers. As complex upper limb movement appears to be rather uniform for both arms, no significant differences between the dominant and non-dominant arm were found. It appears that the novel method using inexpensive gyroscopes is capable of quantifying dynamic stability and periodic movement pattern of the upper limb, therefore a pair of two common gyroscopes or goniometers placed on the patients body may find their place among standard equipment for clinical examinations or in the field of biomechanical measurements. The presented method might possibly also become a part of MoCap systems or in the area of prosthetics in which dynamic stability or movement patterns are key parameters.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Lenka Hanáková, Ph.D.; Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Škoda, D.; Takáč, P.; Schlenker, J.; Svoboda, Z.

Publikováno:

2015, 38th International Conference on Telecommunications and Signal Processing, Piscataway, IEEE), p. 397-402), ISBN 978-1-4799-8498-5, ISSN 1805-5435

Anotace:

The article focuses on a technique of gyroscope data processing and quantifying movement patterns of upper limb during walking. Four cheap gyroscopes were used. Using a novel method based on the trajectory length obtained by plotting shoulder and elbow joint angle vs. each other, provides information for a quantification of the complex arm movement as a whole in the sagittal plane. Two parameters for the evaluation of motion, the trajectory length (TL) and traditional range of motion (ROM), were used to analyze a simple rhythmical movement and identified application possibilities of the new parameter. The Pearsons correlation coefficient indicates very strong correlation between the TL and ROM (r>0.8) for both dominant and non-dominant upper limb. Also, the correlation between the body height and TL or ROM was studied. The correlation between the body height and TL or ROM was a negligible (r<0.2). This shows the versatility of the proposed parameter.

DOI:

10.1109/TSP.2015.7296291

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Schlenker, J.; Čakrt, O.; Kutílek, P.

Publikováno:

2015, Acta Polytechnica, 55 (4), p. 229-236), ISSN 1210-2709

Anotace:

Current techniques for quantifying human postural stability during quiet standing have several limitations. The main problem is that only two movement variables are evaluated, though a better description of complex three-dimensional (3-D) movements can be provided with the use of three variables. A single tri-axial accelerometer placed on the trunk was used to measure 3-D data. We are able to evaluate 3-D movements using a method based on the volume of confidence ellipsoid (VE) of the set of points obtained by plotting three accelerations against each other. Our method was used to identify and evaluate pathological balance control. In this study, measurements were made of patients with progressive cerebellar ataxia, and also control measurements of healthy subjects, and a statistical analysis was performed. The results show that the VEs of the neurological disorder patients are significantly larger than the VEs of the healthy subjects. It can be seen that the quantitative method based on VE is very sensitive for identifying changes in stability, and that it is able to distinguish between neurological disorder patients and healthy subjects.

DOI:

10.14311/AP.2015.55.0229

Typ:

Článek v periodiku excerpovaném databází Scopus cizojaz.

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Čakrt, O.; Svoboda, Z.

Publikováno:

2015, Journal of Bodywork and Movement Therapies, 19 (3), p. 421-428), ISSN 1360-8592

Anotace:

This study examines a relatively new method of studying and quantifying human postural stability in patients with degenerative cerebellar disease. Trunk sway and feet sway were measured during quiet stance. To test the method, ten patients and eleven healthy subjects performed two different stance tasks: standing with eyes open on a firm surface and standing with eyes closed on a foam support surface. Data were recorded using three body-worn gyroscopes (Xsens Technologies B.V.) to measure roll and pitch angular movements of the lower trunk, and left and right foot. The pitch versus roll plots of the trunk and feet were created, and the areas of the convex hull shapes were calculated. It was found that the area of the convex hull of the pitch versus roll plots is suitable for the identification of postural instability disorders caused by degenerative cerebellar disease.

DOI:

10.1016/j.jbmt.2014.09.005

Typ:

Článek v periodiku excerpovaném databází Scopus

Autoři:

Kaľavský, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Kutílek, P.; Gazda, J.; Kimlickova, M.

Publikováno:

2015, 2015 International Conference on Military Technologies (ICMT), Praha, IEEE Czechoslovakia Section), p. 467-471), ISBN 978-80-7231-976-3

Anotace:

The article deals with the issue of rescuing people in aviation using rescue parachutes, while providing basic information on rescue parachute systems for an aircraft and on emergency ejection seats. The success of an emergency abandonment using rescue parachutes is affected by the actual flight conditions as well as the way of emergency abandonment the aircraft as well. Defining suitable conditions for a succesful emergency abandonment is inevitable when designing a flight manual for a particular aircraft. In case of a flight accident and failure to carry out the emergency abandonment, flight conditions are investigated as for their suitability for bailing out.

DOI:

10.1109/MILTECHS.2015.7153708

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Schlenker, J.; Kalavksý, P.; Kutílek, P.; Socha, L.; Szabo, S.; Smrčka, P.

Publikováno:

2015, SAMI 2015 - IEEE 13th International Symposium on Applied Machine Intelligence and Informatics, Proceedings, Budapešť, Institute of Electrical and Electronics Engineers Inc.), p. 339-344), ISBN 978-1-4799-8221-9

Anotace:

Psychological discomfort and stress may negatively affect various work activities especially in professions that are directly responsible for the lives and health of human beings. We can find these kinds of professions mainly in civil aviation, specifically the profession of a pilot. Analysis showed, that the legislative requirements for the qualifications of a pilot, require only the competence for a particular aircraft but they don't take in account the ergonomics of the cabin and the visualization of the basic flight data (analog, glass-cockpit). That's the reason why this paper assesses the influence of flight, navigation and engine data visualization on psychophysiological state of the pilot. In this paper we used the measuring of the heart rate as the main indicator of stress. Spectral analysis was used for the assessment of stress levels with main focus on the activity of the autonomic nervous system. The evaluation was based on twenty subjects in flight training, which were divided into two groups. Each group had different methods of training based on flight data visualization. The results show that the group with the more extensive glass-cockpit training exhibit lower values of psychophysiological stress. These findings may contribute to the increase of aviation safety and the description of human-machine interface in aviation.

DOI:

10.1109/SAMI.2015.7061900

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Schlenker, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Smrčka, P.; Hána, K.; Begera, V.; Kutílek, P.; Hon, Z.; Kašpar, J.; Kučera, L.; Mužík, J.; Veselý, T.; Vítězník, M.

Publikováno:

2015, 2015 International Conference on Military Technologies (ICMT), Praha, IEEE Czechoslovakia Section), p. 399-404), ISBN 978-80-7231-976-3

Anotace:

The article presents a FlexiGuard modular biotelemetric system for real-time monitoring of special military units. The main focus of the system is on automated monitoring of special forces via parallel monitoring of each member of the special team individually, witch includes collecting sets of physiologic (or environmental) parameters. The systems consists of a set of sensors (for monitoring temperature, heart rate, acceleration, humidity etc.) and modular sensing unit, which records the measured data and sends them to the visualization unit. The measured values (i.e. heart rate, surface temperature of the body and so on) are then visualized in the graphic user interface of the visualization unit. Testing of the functionality of the system took place in both laboratory and real environment. In the case of carrying out the measurements on 34 soldiers at series of 4 probands at the same time, the sensor networks worked without any loss of signal. During the data transfer to the visualization unit, a loss of approx 0.2% of packets occurred. The system thus can offer information to the commander, which may prove essential for the optimalization of operational strategies, taking the state of wellbeing of the team members into account.

DOI:

10.1109/MILTECHS.2015.7153712

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Čakrt, O.; Černý, R.

Publikováno:

2015, Journal of Medical and Biological Engineering, 35 (3), p. 348-356), ISSN 1609-0985

Anotace:

This paper proposes two methods that are potentially suitable for the analysis of movements and quantitative assessment of the postural stability of the head. A camera system and a gyroscope system are used to measure the roll and pitch of the subject's head. The pitch versus roll plots of the head are created, and the areas of the shape of a convex hull and those of a confidence ellipse are calculated. The pitch is the rotational motion of the head around the medial-lateral axis, and the roll is the rotational motion around the anterior-posterior axis. In the case of the convex hull, its shape is defined by the pitch and roll excursions when these variables are plotted on an x-y plot. The confidence ellipse is a two-dimensional interval in which lie the points in the x-y plot. In the case of the 95 % confidence ellipse, its shape bounds 95 % of the plotted points of the pitch and roll excursions. The expected values of these excursions are determined via a statistical analysis of data obtained from ten healthy subjects measured with eyes open and closed. The results show a strong correlation between the areas of convex hulls and areas of confidence ellipses. Also, the results show a strong correlation between the areas measured by each system separately. Statistical analysis of the participants with eyes open and closed does not show a significant difference in the areas. The proposed quantitative approaches, based on the data measured by the camera system or the gyroscope system, are suitable for the study of the postural stability. Although the results differ when using different motion capture systems to measure the angular movements of the head, the motion capture systems identified the same subject behaviors.

DOI:

10.1007/s40846-015-0034-7

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Rozenberg, R.; Ing. Lenka Hanáková, Ph.D.

Publikováno:

2015, Air Transport 2015: Zborník príspevkov pri príležitosti Týždňa vedy a techniky, Košice, Technická univerzita v Košiciach, Letecká fakulta), p. 94-100), ISBN 978-80-553-2352-7

Anotace:

Príspevok sa zaoberá problematikou komplexného riadenia kvality. Pojednáva o povahe konceptu TQM a jeho potenciálnej implementácii v organizácii. Článok stanovuje zásady uplatňované v organizácií pri zavádzaní TQM a jeho ďalšom udržiavaní a zlepšovaní. Okrem toho, je pojem TQM a jeho presadzovanie aplikovaný na vzdelávacie inštitúcie čo je náplňou v druhej časti článku.

Typ:

Stať ve sborníku z mezinár. konf. česky

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Szabo, S.; Soušek, R.

Publikováno:

2015, ISBN 978-80-971877-1-2

Anotace:

V období globalizácie, kedy sa stierajú hranice v rámci dostupnosti informácií, pohybu tovaru, vyvíjaní akýchkoľvek obchodných aktivít a prakticky celosvetovo sú uplatňované požiadavky na systémy riadenia (a to nielen v oblasti kvality) uznávanými medzinárodnými štandardmi, ktorých implementáciou a prípadnou certifikáciou organizácie deklarujú, že majú vytvorené podmienky na dosahovanie požadovanej kvality trhom. Zavedenie, udržiavanie a zlepšovanie týchto systémov riadenia umožňuje vytvoriť a rozvíjať modernú, prosperujúcu a úspešnú organizáciu. Pri tom je dôležité udržiavať neustály kontakt so zákazníkom, mať spätnú väzbu a flexibilne reagovať na aktuálne potreby trhu. Predkladané dielo sa zaoberá nielen modernými systémami riadenia, ktoré je možné implementovať v organizáciách v súlade s platnými štandardami a vytvárať tak plne funkčný integrovaný systém riadenia, ale rozoberá aj nástroje riadenia kvality, ktoré je možné využiť ako nástroje zlepšovania a prijímania rozhodnutí vrcholových manažérov na základe faktov. V publikácii je stručne načrtnutá aj história prístupov v oblasti kvality a vyzdvihnuté prínosy významných osobností, ktoré sa výraznou mierou pričinili o zmenu vnímania kvality v minulom období a ktorých myšlienky mali rozhodujúci dopad na vývoj v tejto oblasti. Ďalej sú tu charakterizované domáce a zahraničné organizácie, ktoré v oblasti kvality pôsobia, vysvetlené dôležité pojmy a uvedené niektoré definície, prístupy v oblasti kvality apod.

Typ:

Vysokoškolská učebnice v češtině, aspoň 100 výtisků

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Ing. Lenka Hanáková, Ph.D.; Kutílek, P.; Socha, L.; Cehlár, M.; Petruš, O.

Publikováno:

2015, Progressive Biomedical Materials and Technologies 2015 Conference proceeding, Kladno, FBMI ČVUT), p. 87-90), ISBN 978-80-01-05818-3

Anotace:

In the biomedical industry, nano/micro thin layers are a popular choice due to their biocompatibility. The scratch test is a widely used adhesion strength measurement method. The image analysis software for the evaluation of data obtained by various scratch systems was designed for identification of the failure points and calculation of the critical forces. To determine the distances of the coating-failure events from the beginning of the scratch, the software primarily uses a picture with scale standard and a scratch picture. The computational algorithm is based on the ratio of the real size of an object and the object size in the image. Scratching was performed by Revetest Xpress Scratch system and Dino-Lite Digital Microscope with its own software (DinoCapture) was used to take two pictures, i.e. picture of the scratch and picture of the Dino-Lite calibration sample. Both pictures must be taken using the same magnification, resolution, physical image sizes and contrast. Both images are then analyzed by our own designed software. In the case of a long scratch, the images of the scratch are captured and loaded one after another and the mouse cursor is used to mark out the relevant distances of the failure events. The calculated values of the critical forces and failure events distances of the scratch are then displayed in the own designed graphical user interface.

Typ:

Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Schlenker, J.; Škoda, D.; Hybl, J.; Frynta, D.; Landova, E.; Haskova, T.; Cerny, R.; Kurali, A.

Publikováno:

2015, 2015 International Conference on Applied Electronics, Plzeň, Západočeská univerzita), p. 139-144), ISBN 978-80-261-0385-1, ISSN 1803-7232

Anotace:

The article introduces a novel system for measuring locomotive response of small animals (specifically amphibians and reptiles) to change in their body orientation based on a camera system located on mechanical platform powered by a set of three actuators. The camera system consists of three cameras providing a record three anatomical angles of body segment movements in space. A gyro accelerometer system allowing for measuring angles of the platform orientation in space is also a part of the mechanical platform, together with a computer providing for a precise measuring of body segment angles in anatomical as well as the earth’s coordinate systems. We tested this novel method by measuring head rotation of a small reptile via monitoring reflective markers on the animal’s body. A part of the work’s results is thus a presentation of a method for monitoring animal’s head compensatory movements. The assumption for the future is expanding the use of the system for more complex 3D movements, and adding the possibility to measure not exclusively just momentary values, but also angular velocity and segment acceleration for veterinary and medical use.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Škoda, D.; Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Schlenker, J.; Štefek, A.; Kalina, J.

Publikováno:

2015, Proceedings of IEEE 13th International Symposium on Applied Machine Intelligence and Informatics, Budapest, IEEE Hungary Section, University Obuda), p. 267-272), ISBN 978-1-4799-8220-2

Anotace:

The objects of the study including determining the relationships between movements of upper extremities identifying joint angles using a fuzzy logic system (FS). The authors analyzed ranges of joint angles and simple rhythmical movement: swinging segments of walking subjects´ arms moving in-phase (synchronously) or antiphase (reciprocally), and designed fuzzy expert system which has never been described before. The set of data to create and study fuzzy logic for identifying upper extremity angles was measured in ten volunteers. An Xbus Kit system was used to measure upper limb movements. The joint angles in the sagittal plane and angle in the frontal plane were determined and relation maps of the in-phase and antiphase movements in the contralateral and ipsilateral joints were designed. The if-then rules were derived from experimental findings and knowledge about ranges of angles and relations between angles of upper limbs during walking. The estimated values of joint angles were compared with the observed values of joint angles. Spearman’s correlation coefficients were calculated for this purpose, and strong correlations for the walking speed of 3 km/h and 5 km/h were observed. The FS based on relation maps of the inphase and anti-phase movements in the contralateral and ipsilateral joints have shown to be suitable for the estimation of joint angles of upper limb during walking. The concept of the FS offers a wide range of application in rehabilitation and prostheses design.

DOI:

10.1109/SAMI.2015.7061888

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Ing. Lenka Hanáková, Ph.D.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Petruš, O.; Cehlár, M.; Socha, L.

Publikováno:

2015, Progressive Biomedical Materials and Technologies 2015 Conference proceeding, Kladno, FBMI ČVUT), p. 91-94), ISBN 978-80-01-05818-3

Anotace:

The new developed nano and micro thin films in biomedicine are intensively studied at the present time. Many research institutions are looking for ways to evaluate mechanical properties of these films. One of the most important characteristic is practical adhesion. Very important method to evaluate the practical adhesion strength is scratch test. Often, however, the research teams use a method uses disunity evaluation of adhesion of biocompatible surface layer. This fact leads to the inability to quantitatively compare research results. However, there are international standards for Europe, USA and other nations describing scratch tests, for example: ISO 1071-3, ISO 20502, ISO 1518, ASTM C1624-05, ASTM D7187-05, which apply mostly for macro-scratch testers, however can be utilized also for measuring nano- and micro-layers. We tested new evaluation methods and procedures based on international standards and expert system in order to eliminate the problem of disunited measurement of practical adhesion of the layers. This article aims to show the new possibility of using established standards to evaluation of adhesion of nano and micro thin biocompatible films and to show application of the standards.

Typ:

Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Čakrt, O.; Schlenker, J.; Bizovská, L.

Publikováno:

2015, Acta Gymnica, 45 (2), p. 85-92), ISSN 1212-1185

Anotace:

Background: Patients with disorders of nervous or musculoskeletal system often show instability of the body segments during the stance tasks. Traditionally, stabilometric platforms are used to measure body sway. However, these devices are expensive and do not allow the evaluation of the individual movements of body segments. At present, accelerometers or gyroscopes are used to measure the movements of the body segments. For these new motion capture (MoCap) systems, methods for quantitative evaluation of a body segment movement are being developed. Objective: The main objective of this paper is to describe a new method which would be suitable for quantifying postural stability and identifying differences in balance control using data recorded by an inexpensive 2-DoF gyroscope. Methods: Method based on total length of trajectory (TL) in a 2-D plot of angles was proposed for quantitative evaluation of the trunk and feet sway. The sway was measured during quiet stance of ten middle-aged patients (Pts) with degenerative cerebellar disorder and eleven young healthy subjects (HS) standing with eyes open (EO) on a firm surface (FiS) and eyes closed (EC) on a foam surface (FoS). Data were obtained using three gyroscopes (Xsens) to measure roll and pitch angular movements of the trunk, and left and right foot. The pitch versus roll plots of the trunk and feet were created and the trajectory lengths of the pitch vs. roll angle were calculated. Results: Although the results vary while measuring different segments of the body, the method showed significant differences between the two different groups. Significant differences between the HS and Pts were found in EO standing on a FiS for TLs of the trunk (p = .02) and TLs of the feet (p < .01). Similarly in EC standing on a FoS significant differences (p < .01) between groups were found for TLs of both the trunk and the feet (p < .01). Conclusions: It was found that the TL of pitch vs. roll is suitable for quantifying postural swa

DOI:

10.5507/ag.2015.008

Typ:

Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:

Kutílek, P.; Čakrt, O.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Hána, K.

Publikováno:

2015, Biomedical Engineering - Biomedizinische Technik, 60 (2), p. 171-176), ISSN 0013-5585

Anotace:

The position of the trunk can be negatively affected by many diseases. This work focuses on a noninvasive method of quantifying human postural stability and identifying defects in balance and coordination as a result of the nervous system pathology. We used a three-degree-of-freedom orientation tracker (Xsens MTx unit) placed on a patient's trunk and measured three-dimensional (3-D) data (pitch, roll, and yaw) during quiet stance. The principal component analysis was used to analyze the data and to determine the volume of 3-D 95% confidence ellipsoid. Using this method, we were able to model the distribution of the measured 3-D data (pitch, roll, and yaw). Eight patients with degenerative cerebellar disease and eight healthy subjects in this study were measured during stance, with eyes open and eyes closed, and statistical analysis was performed. The results of the new method based on the 3-D confidence ellipsoid show that the volumes related to the patients are significantly larger than the volumes related to the healthy subjects. The concept of confidence ellipsoid volume, although known to the biomechanics community, has not been used before to study the postural balance problems. The method can also be used to study, for example, head and pelvis movements or alignments during stance. © 2015 by De Gruyter.

DOI:

10.1515/bmt-2014-0012

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Hejda, J.; Čakrt, O.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Schlenker, J.; Kutílek, P.

Publikováno:

2015, Biocybernetics and Biomedical Engineering, 35 (3), p. 185-191), ISSN 0208-5216

Anotace:

The article focuses on a non-invasive method of quantifying human postural stability. Recent alternatives to quantify human postural stability have several limitations – the major one being the evaluation of only two physical quantities of body movement in 3D space – however, a complex movement pattern can be described better using three physical quantities. A cheap 3DOF orientation tracker (Xsens MTx unit) placed on patient's trunk was used to measure roll, pitch and yaw. Using a novel method based on the total length of the 3-D trajectory of body sway angles, we are able to evaluate 3-D movements of the trunk. The trajectory length obtained by plotting roll, yaw and pitch vs. each other (i.e. curve in the 3-D plot) was used to identify a pathological balance control. In this study, ten patients with progressive cerebellar ataxia and eleven healthy subjects were measured and a statistical analysis was performed. The results yielded by new method show that the total trajectory lengths of patients with cerebellar disease are significantly larger than the total trajectory lengths of healthy subjects. It is evident from the median of the total trajectory lengths that the method based on the data obtained by an inexpensive orientation tracker may be used to quantify human postural stability and enables for studying body sway in 3-D space. For example, the 3-D deviations of the trunk angles in a time period that are caused by a tremor in 3-dimensional space can be studied accordingly by the method.

DOI:

10.1016/j.bbe.2015.02.001

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Smrčka, P.; Socha, L.

Publikováno:

2014, Acta Polytechnica, 54 (5), p. 352-357), ISSN 1210-2709

Anotace:

A comparison is made between two methods for monitoring small movements made by a patient in a horizontal position on a hospital bed. The methods use sensors based on strain gauge bridges configured to measure torsion deformation and sensors based on strain gauge bridges configured to measure the bending deformation of two two-arm brackets. Both methods provide information about the patient’s physiological movements. The methods were tested and compared in order to decide which may be most appropriate for use in clinical practice. The two methods have never been compared before, and the results can be used in developing new methods for monitoring patients.

DOI:

10.14311/AP.2014.54.0352

Typ:

Článek v periodiku excerpovaném databází Scopus cizojaz.

Autoři:

Kutílek, P.; Hýbl, J.; Mareš, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Smrčka, P.

Publikováno:

2014, Acta Polytechnica, 54 (3), p. 197-204), ISSN 1210-2709

Anotace:

This paper describes new methods and systems designed for application in upper extremity prostheses. An artificial upper limb with this system is a robot arm controlled by EMG signals and a set of sensors. The new multi-sensor system is based on ultrasonic sensors, infrared sensors, Hall-effect sensors, a CO2 sensor and a relative humidity sensor. The multi-sensor system is used to update a 3D map of objects in the robot's environment, or it directly sends information about the environment to the control system of the myoelectric arm. Occupancy grid mapping is used to build a 3D map of the robot's environment. The multi-sensor system can identify the distance of objects in 3D space, and the information from the system is used in a 3D map to identify potential collisions or a potentially dangerous environment, which could damage the prosthesis or the user. Information from the sensors and from the 3D map is evaluated using a fuzzy expert system. The control system of the myoelectric prosthetic arm can choose an adequate reaction on the basis of information from the fuzzy expert system. The systems and methods were designed and verified using MatLab/Simulink. They are aimed for use as assistive technology for disabled people.

DOI:

10.14311/AP.2014.54.0197

Typ:

Článek v periodiku excerpovaném databází Scopus cizojaz.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Szabo, S.; Němec, V.

Publikováno:

2014, eXclusive e-JOURNAL (4), ISSN 1339-4509

Anotace:

The contribution is dealing with the issue of air transportation safety in view of the potential causes resulting in air accidents and their prevention. It classifies the causes of the accidents by the separate phases of flight. Further it focuses on air accidents investigation and possible prevention. The conclusion characterizes some international organizations dealing with the issue of safety in civil aviation.

Typ:

Článek v odborném recenzovaném periodiku

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Hána, K.

Publikováno:

2014, Central European Journal of Medicine, 9 (6), p. 814-820), ISSN 1895-1058

Anotace:

Quantification of upper extremity movement is a common objective in both research and clinical practice. Currently, methods based on angle-angle diagrams, also called cyclograms, seem to be promising. Nevertheless, compared to the study of lower limbs, the concept of angle-angle diagrams has not been systematically used to study upper limb movements during walking. The paper describes two examples of new methods based on angle-angle diagrams for application in rehabilitation and assistive robotics. The cyclograms represent information about the relationship between the angles and their changes over time. We used cyclograms as patterns for learning artificial neural networks and predicting the movement of upper-limb. Together with artificial intelligence, cyclograms offer wide scope of application in prosthesis control systems. Using bilateral cyclogram, the information about the relationship between the right and left arm joint angles is used to evaluate the symmetry of movements. The method based on the orientation of the bilateral cyclogram can be used as an additional method for determining the symmetry of movements of the upper limbs or exo-prosthesis.

DOI:

10.2478/s11536-013-0322-y

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Línek, M.; Szabo, S.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2014, ACTA SCIENTIFICA ACADEMIAE OSTROVIENSIS.SECTIO A, 2 (4), p. 86-94), ISSN 2300-1739

Anotace:

Recently two phrases " Cloud Computing " and " List of ICT services " resonate in the field of architecture and building data centers. The two terms terms are the most inflected ones and therefore they deserve due attention. The notion of cloud computing has changed in the world of information technology-based practices and business models,with the defence sector as no exception. It can be characterized as sharing hardware and software resources through a network infrastructure. Cloud Computing as a new model of IT resources can significantly reduce spending on IT resources and complexity while improving optimization workloads and increase service levels. Its platform Cloud is strongly scalable, providing a superior user experience and can be characterized by new Internet management practices. The list of ICT fills the main idea of the ITSM - ICT transformation of the branch to a new model of its management activities - through supply management defined ICT services. The catalogue of ICT is a list of the various services provided by the ICT and ICT services supplier, usually representing a branch of securing ICT operation in the organization . It should contain characteristics defined by the ICT services , as well as details about the customer and the person responsible for their maintenance. This document is very important for the successful deployment of the SLM process but also for the entire ITSM . In fact, it helps customers and users understand the potentials of the ICT Department.

Typ:

Článek v odborném recenzovaném periodiku

Autoři:

Molnárová, D.; Poprenda, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2014, AIR TRANSPORT 2014, Košice, Technická Univerzita), p. 93-97), ISBN 978-80-553-1867-7

Anotace:

Article aims to increase the prosperity of elfa, sro, based on corporate image, the main carriers are particularly satisfied employees and customers. The aim is to process theoretical knowledge of the company's image and analyze the current state of image building in the company Elf, Ltd.. To find the necessary information on the company's image was used questionnaire. According to the survey results, we can conclude what you took shape public opinion about the company and whether the prevailing general satisfaction among employees. On the basis of dissatisfaction will be designed solutions that will lead to a positive corporate image and prosperity of the company.

Typ:

Stať ve sborníku z lokální konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Čakrt, O.; Černý, R.

Publikováno:

2014, Acta Polytechnica, 54 (4), p. 295-300), ISSN 1210-2709

Anotace:

Assessments of body-segment angular movements are very important in the rehabilitation process. Head angular movements are measured and analyzed for use in studies of stability and posture. However, there is no methodology for assessing angular movements of the head, and it has not been verified whether data measured by fundamentally different MoCap systems will lead to the same results. In this study, we used a camera system and a 3DOF orientation tracker placed on the subject's head, and measured inclination (roll) and flexion (pitch) during quiet stance. The total length and the mean velocity of the traces of the pitch versus roll plots were used to measure and analyze head orientation. Using these methods, we are able to model the distribution of the measured 2D data, and to evaluate stability and posture. The results show that the total lengths and the mean velocities related to the 3DOF orientation tracker do not differ significantly from the total lengths and the mean velocities of traces related to the IR medical camera. We also found that the systems are not interchangeable, and that the same type of system must be used each time. The designed methods can be used for studies not only of head movements but also of movements of other segments of the human body, and can be used to compare other types of MoCap systems, depending on the requirements for a specific rehabilitation examination.

DOI:

10.14311/AP.2014.54.0295

Typ:

Článek v periodiku excerpovaném databází Scopus cizojaz.

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Čakrt, O.; Svoboda, Z.

Publikováno:

2014, Acta of Bioengineering and Biomechanics, 16 (2), p. 85-94), ISSN 1509-409X

Anotace:

The position of the trunk can be negatively influenced by many diseases. Several methods can be used for identifying defects in balance and coordination as a result of pathology of the musculoskeletal or nervous system. The aim of this article is to examine the relationship between the three methods used for analysis of trunk sway and compare two fundamentally different MoCap systems. We used a camera system and a 3DOF orientation tracker placed on subject's trunk, and measured inclination (roll) and flexion (pitch) during quiet stance. Ten healthy participants in the study were measured with eyes open and closed. The pitch versus roll plots of trunk were formed, and the area of the convex hull, area of confidence ellipse and total length of the trajectory of the pitch versus roll plot were calculated. The statistical analysis was performed and strong correlation between the area of the convex hull and area of the confidence ellipse was found. Also, the results show moderate correlation between the area of the confidence ellipse and total length of the trace, and moderate correlation between the area of the convex hull and total length of the trace. In general, the different MoCap systems show different areas and lengths but lead to the same conclusions. Statistical analysis of the participants with eyes open and eye closed did not show significant difference in the areas and total lengths of the pitch versus roll plots.

DOI:

10.5277/abb140210

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Szabo, S.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Kutílek, P.; Schlenker, J.

Publikováno:

2014, Proceedings of the International Scientific Conference Quality and Leading Innovation´2014, Košice, Technical University of Kosice), p. 190-207), ISBN 978-80-553-1815-8

Anotace:

Purpose: The contribution is a treatise on the issue of quality of the telecommunication services, assessing services of mobile phone operators active in the Slovak market. Based on a survey, it presents evaluation of customer satisfaction with the services provided by the Telefónica Slovakia, Ltd. operating under the trademark of O2. Methodology: In this article, we have shown the possibilities for evaluating customer satisfaction in the telecommunications field. For assessing satisfaction of hundred respondents included in this study, we used a questionnaire in accordance with the Likert’s format. Findings: The results shows, although O2 is the shortest time in the Slovak market compared to other providers, that the customers are globally satisfied with the services provided. The questionnaire-based survey has clearly also shown the areas where the Telefónica Slovakia, Ltd. still has to improve and focus its marketing strategy. Value of paper: The main contribution of the article is pointing out to the ways to approach the evaluation of customer satisfaction in the field of customer services, which may yield innovative marketing strategies of a companies.

DOI:

10.12776/QALI.V1.15

Typ:

Stať ve sborníku z mezinár. konf.

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Svoboda, Z.; Smrčka, P.

Publikováno:

2014, 16th Mechatronika 2014, Brno, Brno University of Technology), p. 399-401), ISBN 978-80-214-4817-9

Anotace:

Knowledge of bilateral asymmetry of moments of muscle forces is important because a “weak” muscle that is not fully ready to create the required moment can be identified and restored to provide symmetric gait. However, there is currently no method to determine the symmetry of muscular moments of the left and right sides of body during walking. Recently, new technique based on the geometric properties of symmetric diagrams, also called bilateral cyclograms, was introduced. In order to quantify the symmetry of muscular moments, a bilateral synchronized cyclogram which represents the same gait variables, i.e. moments, and two sides of the body was used. For symmetric gait, cyclogram should lie on a symmetry line passing through the origin inclined at an angle 45º. To study the gait variables, gait measurement was performed using a MoCap system (VICON MX; Oxford Metrics) and four force plates (AMTI, Advanced Mechanical Technology). Calculations of parameters of gait were performed using the OpenSim (NIH Center for Biomedical Computation). A three-dimensional lower extremity musculoskeletal model was used to estimate the moments of muscle forces of a subject during walking. The data from the OpenSim software were normalized, and then the bilateral cyclograms of two synchronized moments (of the left and right side of the body) are created and evaluated. The synchronized bilateral cyclograms of healthy subjects are considerably symmetrical in almost all cases (i.e. 86%). Shapes of the synchronized bilateral cyclograms of the moments of muscles of the subjects with cerebral palsy are significantly asymmetric in all cases. Based on the experiments, we found that the bilateral cyclograms can be used to study asymmetry of the moments of muscle forces. The technique could find applications in rehabilitation and clinical examinations.

DOI:

10.1109/MECHATRONIKA.2014.7018291

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Štefek, A.; Socha, L.; Schlenker, J.; Hána, K.; Szabo, S.

Publikováno:

2014, 16th Mechatronika 2014, Brno, Brno University of Technology), p. 405-410), ISBN 978-80-214-4817-9

Anotace:

Flying an aircraft requires a significant degree of coordination of upper and lower limbs. Such movements tend to be rather uncoordinated in the case of inexperienced pilots which results in inaccurate piloting. The aim of this study is to prove or disprove the dependence of the upper limb activity in relation to the aircraft steering during various actions which are required for precise maneuvering. We also deal with the design of a method to determine the degree of correlation between the movement of the hand and the airplane. The study was conducted on 8 subjects with the same level of experience during 11 hours of flight training on the simulator of type TRD40 and aircraft of type DA40. Subjects performed 14 maneuvers in total. Between takeoff and landing a recurring cycle of four maneuvers has been carried out by the subjects. Repeated maneuvers were in the order from the straight-and-level flight, horizontal turn by 360°, ascend turn by 180°, and descent turn by 180°. Recorded data except for basic flight data (magnetic course, banked and altitude) have been variables depicting the activity of the pilot’s upper limb. The activity was measured using triaxial accelerometer located on the dorsal side of the distal end of the forearm. The correlation coefficient proved relationship between the upper limb movement and aircraft steering both at bank and altitude. It testifies that change of bank and altitude of aircraft is directly connected with upper limb movements. Resultant activity standard deviation relation correlation coefficient is 0.7.

DOI:

10.1109/MECHATRONIKA.2014.7018292

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Fitl, P.; Smrčka, P.

Publikováno:

2014, 16th Mechatronika 2014, Brno, Brno University of Technology), p. 519-525), ISBN 978-80-214-4817-9

Anotace:

The most frequently used method for scratch test in the international standards is progressive loading scratch test mode. Although the mentioned standards to measure practical adhesion of nano and micro thin films require optical microscope with magnifications between 100x and 500x, not only the optical microscopes, but even the international standards are not usually and largely used to study new biocompatible thin films. The authors designed a method and a custom-written program for the measurement and evaluation of scratches using digital microscope and digital microscope image analysis, which is based on the requirements of international standards for the determination of critical normal forces and capabilities of existing scratch testers. The proposed procedure and software were tested on the samples of TiN, Au, Pt and Pd biocompatible nano-thin layers. Delamination or loss of adhesion was observed in all cases, and two types of critical normal forces were determined. It was found that the calculated critical normal forces are largely similar in the three operations of the measurement of a sample. Thus, evaluation using critical scratch loads measured by three test operations seems to be sufficient. The new software and procedures allow us to evaluate the practical adhesions of a wide range of substrate and thin film materials, and gave us credible results.

DOI:

10.1109/MECHATRONIKA.2014.7018313

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

Kutílek, P.; Hejda, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Vlčková, K.; Černý, R.

Publikováno:

2014, 19th International Conference on Applied Electronics 2014, Pilsen, University of West Bohemia), p. 169-172), ISBN 978-80-261-0276-2, ISSN 1803-7232

Anotace:

The article is dealing with the study of stability and posture by measuring and analyzing the angular movements of the head and shoulders. In neurological practice, however, this method of evaluating the relative angular movements of the head and shoulders is not a common practice. The objective of this study was to develop a method of precise measurement of relative angular movements of the head and shoulders, in other words, measuring the relative position of the head and shoulders in a 3-D space with the accuracy up to 1°. The camera system of our design provides direct information for physicians about the relative position of the patient's head and shoulders, is described by the angles. The inclination and rotation of the head and shoulders were measured with the accuracy to 1°. Then, a 2-D plot of the relative rotation of the head and shoulders versus the relative inclination of the head and shoulders was obtained. The total length and mean velocity of the trajectory, in the plot, were used to measure and analyze head and shoulder movements. The plots helped in modeling the distribution of the measured 2-D data and evaluate stability and posture of the patient's body. The new method offers quantitative assessment of head and shoulder postures. Consequently, they can also be used for specific rehabilitation tests and applications.

DOI:

10.1109/AE.2014.7011693

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Szabo, S.; Socha, L.; Kutílek, P.; Němec, V.

Publikováno:

2014, TRANSPORT MEANS 2014, Kaunas, Kauno technologijos universitetas), p. 339-342), ISSN 1822-296X

Anotace:

Psychic discomfort or pilot's stress can negatively influence the course of flight. Therefore it appears reasonable to monitor those parameters, which directly reflect the psychic and physical state of the pilot. This work focuses on the analysis of respiratory rate as a marker of stress changes. The measured sample consisted of 17 pilots - beginners in carrying out flight tasks with a variable degree of dificulty. Interquartile range as a marker of variability was primarily used for evaluation of respiratory rate. The results show, that by this type of evaluation, the respiratory rate is a suitable marker of stress change.

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Kaľavský, P.; Šebeščáková, I.

Publikováno:

2014, eXclusive e-JOURNAL (4), ISSN 1339-4509

Anotace:

The article focuses on the issue of globalization and its impact on aviation. Respective globalization elements which take place in the field of aviation are studied. Also, the issue of terrorism and the elimination of possible risks resulting from this issue are paid attention to. The work further focuses the issue of safety, information technologies, systems of quality management in aviation and pays attention to the field of environment.

Typ:

Článek v odborném recenzovaném periodiku

Autoři:

Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Hudáková, V.

Publikováno:

2014, New Trends in Civil Aviation 2014, Brno, Akademické nakladatelství CERM), p. 61-63), ISBN 978-80-7204-891-5

Anotace:

The contribution is aimed to indentify the actual status of management systems as implemented by airports in the Slovak republic and prospects of their implementation. It analyses quality management systems and their applications in air transportation in the Central-European region. Further analysis is concerned the Slovak airports in terms of adopting management systems in the various areas of management in compliance with the corresponding standards. Based on the controlled interview, the assessment is focused on the potential of implementing such management systems at Slovak airports.

Typ:

Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:

Kutílek, P.; Vítečková, S.; Svoboda, Z.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Smrčka, P.

Publikováno:

2014, Acta Polytechnica Hungarica, 11 (5), p. 25-38), ISSN 1785-8860

Anotace:

Our work focuses on studying gait symmetry with the use of bilateral angle-angle diagrams. The geometric characteristics of angle-angle diagrams can be used to characterize gait, as well as, identify and quantify the associated gait asymmetry. The angle-angle diagrams were created for ten patients with leg length inequality (LLI), to quantify gait symmetry before and after an application of the heel lift. In order to quantify the symmetry of human walking, we have invented and used the characteristics of an angle-angle diagram, which represent the evolution of the two joint angles, i.e. left and right knee angles or left and right hip angles. The novel methods are based on the area of the convex hull of the hip-hip diagram or knee-knee diagram, and can be used as an additional method for the determination of gait symmetry of the bipedal walking of human subjects or robots. Our method is not limited to gait studies, it can also be used to study arm swing symmetry.

DOI:

10.12700/APH.11.05.2014.05.2

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Begera, V.

Publikováno:

2014, ISBN 978-80-971877-0-5

Anotace:

Vedecká monografia sa zaoberá problematikou kvality poskytovaných sociálnych služieb vo vybraných zariadeniach sociálnych služieb v územnom obvode mesta Košice v súlade s novelou zákona o sociálnych službách, ktorý vstupuje do platnosti od 1.1.2014. V úvodnej časti monografie sú rozpracované teoretické východiská, ďalej metodológia a analýza vykonaného výskumu a v závere zhodnotenie výsledkov výskumu a navrhnuté potenciály zlepšovania.

Typ:

Jiná kniha česky

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.

Publikováno:

2014, Bezpečnost a doprava, Pardubice, Institut Jana Pernera), p. 117-122), ISBN 978-80-86530-92-5

Anotace:

Príspevok sa zaoberá problematikou ľudského faktora a jeho vplyvu na vznik leteckých nehôd. Rozoberá rizikové faktory vzniku chýb a charakterizujte modely posudzovania ľudského faktora SHELL a Reasnov model. V príspevku sú taktiež rozoberané predpoklady vzniku leteckej nehody vo vzťahu k jednotlivým leteckým profesiám.

Typ:

Stať ve sborníku z mezinár. konf. česky

Autoři:

Bujková, N.; Poprenda, J.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2014, AIR TRANSPORT 2014, Košice, Technická Univerzita), p. 22-28), ISBN 978-80-553-1867-7

Anotace:

This article identifies and analyzes the current marketing plan of Košice Airport. In the first part are defined marketing, marketing plan, SWOT analysis and the impact of effective planning for the marketing goals of the company. In the second part already specifically analyze the current marketing situation at Košice Airport. Service, which provides airport for passengers and carriers and competition. The SWOT analysis characterize the strengths and weaknesses of the airport. Also its opportunities and threats. Define the objectives of the airport and a strategy to achieve these objectives.

Typ:

Stať ve sborníku z lokální konf.

Autoři:

Kaľavský, P.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2014, New Trends in Civil Aviation 2014, Brno, Akademické nakladatelství CERM), p. 74-78), ISBN 978-80-7204-891-5

Anotace:

The article is devoted to the methodology of measuring pilot performance under the conditions of real flight. It provides the basics information on a research project realised to obtain new information regarding training and education of pilots. The introduction is focused on the analytical part of the project and the outputs in terms of the current state of the art. detailed view is cast on the issue of measuring pilot performance under specific conditions of the cockpit or the flight simulator. The article is zooming-in on the two selected and developed methods of pilot performance in terms of the defined indicators evaluated, conditions of compliance for conducting research and procedures of the methodology of pilot performance measurements.

Typ:

Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:

Vysoká, M.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Szabo, S.

Publikováno:

2014, AIR TRANSPORT 2014, Košice, Technická Univerzita), p. 188-193), ISBN 978-80-553-1867-7

Typ:

Stať ve sborníku z lokální konf.

Autoři:

Socha, L.; Kaľavský, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Gazda, J.

Publikováno:

2014, Acta Avionica, 16 (29), p. 53-56), ISSN 1335-9479

Anotace:

The contribution is a presentation of a project focused on research of pilot training methods using flight simulators while bringing us closer to the methodology of measuring pilot performance applied during the research. The article is centered on the fundamental hyphoteses and the research activities in the field of investigating how changes in the presentation of flight an navigation information affect pilot performance. Also, analysed procedures of pilot performance measurements and methods of studying workload are specified.

Typ:

Článek v odborném recenzovaném periodiku

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Socha, L.; Socha, Ľ.

Publikováno:

2014, Zborník recenzovaných príspevkov z 2. ročníka medzinárodnej vedeckej konferencie, Košice, Podnikovohospodráska fakulta so sídlom v Košiciach, EU v Bratislave), p. 155-162), ISBN 978-80-225-3982-1

Anotace:

Príspevok sa zaoberá problematikou ľudského faktora v leteckej doprave a jeho významom z hľadiska udržiavania a zvyšovania jej vysokej bezpečnosti. Rozoberá základné zdroje vzniku chýb v súlade s jednotlivými modelmi posudzovania ľudského faktora. Zároveň sú v príspevku charakterizované jednotlivé druhy záťaže a záťažové situácie, ktoré môžu negatívne vplývať na pracovný výkon človeka. Havným cieľom tejto štúdie bolo popísať možnosti znižovania záťaže a tým vytváranie podmienok pre lepšie zvládanie záťažových situácií.

Typ:

Stať ve sborníku z mezinár. konf. česky

Autoři:

Kutílek, P.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Vítečková, S.; Svoboda, Z.

Publikováno:

2014, Biocybernetics and Biomedical Engineering, 34 (1), p. 46-52), ISSN 0208-5216

Anotace:

Our work focuses on a new approach of studying asymmetry in walking based on the orientation of the synchronized bilateral hip–hip cyclograms. Patients with foot drop were included in the study and were asked to walk without an orthosis, and with foot-up splint, calf mounted support strap and ankle wrap. The hip–hip cyclograms were created to quantify gait asymmetry before and immediately after the application of ankle foot orthoses. This approach has never been applied before to study the gait asymmetry in patients with ankle foot orthoses. In order to quantify the gait asymmetry, we have tested the application of the approach based on the inclination angle of the synchronized hip–hip cyclograms. The symmetry index was used as a comparative method to evaluate the symmetry of bipedal walking. The results indicate the correlation between the symmetry index and inclination angle of the synchronized hip–hip cyclograms. The methods based on the inclination angle and symmetry index show slightly different results because the symmetry index depends on discrete variables and is unable to reflect the asymmetry as it evolves over a complete gait cycle. The inclination angle of the hip–hip cyclogram depends on the complete gait cycle. Except for the inclination angles of patients with the support strap, the results show that the new approach did not identify significant improvement in the gait symmetry after the application of the orthoses. The approach based on the orientation of the hip–hip cyclograms can be used as an additional approach for determining the gait asymmetry.

DOI:

10.1016/j.bbe.2013.10.001

Typ:

Článek v periodiku excerpovaném SCI Expanded

Autoři:

Schlenker, J.; Nedělka, T.; Riedlbauchová, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Hána, K.; Kutílek, P.

Publikováno:

2014, European Journal for Biomedical Informatics, 10 (1), p. 35-40), ISSN 1801-5603

Anotace:

Introduction: This paper describes principles of a promising method for medical data analysis called recurrence analysis, which is based on the chaos theory that better describes processes in the living organisms. Methods: Phase space reconstruction and recurrence analysis are explained in brief. The main part of the work focuses on recurrence plot, which is a basic tool for recurrence analysis. Conclusion: Possible clinical applications of recurrence analysis in the eld of medicine are discussed and a short overview of pilot projects performed by our team on this topic is given.

Typ:

Článek v odborném recenzovaném periodiku cizojazyčně

Autoři:

Kaľavský, P.; Kimličková, M.; Socha, L.; doc. Ing. Bc. Vladimír Socha, Ph.D.

Publikováno:

2014, Acta Avionica, 16 (29), p. 37-40), ISSN 1335-9479

Anotace:

The article addresses the basic outputs of the anaysis conducted within the project of "Research of pilot training methods using flight simulators". It offers the results of the analysis regarding the statute of the art in the field adding hypotheses developed for the research part of the project. Focus is on identifying the key processes labelled as insufficient by current pilot training requirements in terms of their negative impact on air transport safety.

Typ:

Článek v odborném recenzovaném periodiku

Autoři:

Regula, M.; doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Socha, L.; Hána, K.; Ing. Lenka Hanáková, Ph.D.; Szabo, S.

Publikováno:

2014, 16th Mechatronika 2014, Brno, Brno University of Technology), p. 639-643), ISBN 978-80-214-4817-9

Anotace:

Heart rate is a parameter describing activity of human heart and its psycho-physiological character based on sympathovagal balance of autonomic nervous system, which could be instrumental for indicating stress in aircraft pilots. The assessment focuses on transition from the airplane´s analog presentation of flight data to digital visualization (glass cockpit). The main objective was to examine heart rate of pilots according to the change of flight data imaging during proposed training program, using flight simulator (TRD40 type) and aircraft (DA40 type). Another aim is to interpret stress during different flight tasks and define its influence on pilots’ performance. A group of ten healthy pilots with the same level of experience participated in a seven week training program. A custom designed system consisting of non-complex units was used for measuring procedures during every recorded flight. Heart rate was recorded using a commercial chest belt made by GarminÒ. Spectral analysis of the measured signal has provided the status of sympathovagal balance based on Lomb normalized periodogram. Variation of mental stress according to the values of low to high frequency ratio LF/HF was proven according to the course of training. Results show that the transit from analog to digital visual presentation of avionic data induces stress among pilots and heart rate could be an appropriate parameter defining the actual stress condition.

DOI:

10.1109/MECHATRONIKA.2014.7018334

Typ:

Stať ve sborníku z prestižní konf.

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Socha, L.

Publikováno:

2013, Zborník recenzovaných príspevkov z 1. Medzinárodnej vedeckej konferencie „Marketing manažment, obchod a sociálne aspekty podnikania“, Košice, Podnikovohospodráska fakulta so sídlom v Košiciach, EU v Bratislave), p. 427-436), ISBN 978-80-225-3730-8

Anotace:

V súčasnosti zavedenie, dôsledné udržiavanie a neustále zlepšovanie manažérskych systémov v riadení organizácie je účinným prostriedkom jej úspešnosti a zároveň aj silným nástrojom jej konkurencieschopnosti v domácom ako aj medzinárodnom trhovom prostredí. Uplatňovanie jednotlivých alebo integrovaných manažérskych systémov v organizácii sa stalo v dnešnej dobe základným štandardom, ktorý dáva základný predpoklad pre jej úspešný rozvoj. Dôkazom o tom, že v organizácii sú vytvorené podmienky na dosahovanie kvality v oblasti dodávaného produktu alebo poskytovanej služby sú certifikáty zavedených systémov riadenia vydaných na základe úspešných auditov vykonanými akreditovanými certifikačnými spoločnosťami. Pretože súčasné trhové prostredie vyvíja na organizácie tlak z hľadiska preukazovania zavedenia systémov riadenia kvality podľa rôznych štandardov, vrcholové vedenie mnohých spoločností toto vníma ako ďalšiu zbytočnú administratívu a odčerpávanie finančných prostriedkov. Aj cez to tieto systémy vo svojich spoločnostiach zavádzajú a certifikujú, ale ich potenciál k rozvoji spoločnosti, efektívnejšiemu riadeniu a zvyšovaniu ekonomických výnosov využívajú minimálne alebo vôbec. Je potrebné si ale uvedomiť, že uplatňovanie manažérskych systémov riadenia má zásadný vplyv na ekonomické výsledky organizácie. V príspevku chceme na základe analýzy, syntézy, analógie a ďalších metód využitých pri hodnotení dopravnej spoločnosti C&B Trans, s. r. o., ktorej činnosťou je medzinárodná a vnútroštátne nákladná a osobná doprava prezentovať zistenia súvisiace s ekonomickými dopadmi uplatňovaných certifikovaných systémov riadenia v organizácii.

Typ:

Stať ve sborníku z mezinár. konf. česky

Autoři:

doc. Ing. Bc. Vladimír Socha, Ph.D.; Kutílek, P.; Vítečková, S.

Publikováno:

2013, Journal of Electrical Engineering, 64 (6), p. 354-360), ISSN 1335-3632

Anotace:

This work focuses on describing an evaluation method used in nano- and micro-thin ﬁlms based on fuzzy logic expert systems. The aim is the elimination of comparison complications with mechanical properties of tin ﬁlms, practical adhesion being one of the most important characteristic of tin ﬁlms. The basic method for evaluating the practical adhesion strength is scratch test method, while the issue is that research teams use measurement methods based on the non-uniform measurement conditions of adhesion of biocompatible thin ﬁlms. The authors tested new evaluation method and procedure based on international standards and fuzzy rule based expert system in order to eliminate the problem of comparison of practical adhesion of the ﬁlms. The article concentrates on testing and using the fuzzy logic expert system designed based on international standards for evaluating adhesion of thin ﬁlms in nano and micro dimensions. The materials used for tests of the fuzzy expert system were DLC biocompatible layers and substrate a titanium alloy Ti6Al4V.

DOI:

10.2478/jee-2013-0053

Typ:

Článek v periodiku excerpovaném SCI Expanded

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Lidé na fakultědoc. Ing. Bc. Vladimír Socha, Ph.D.

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Research Report on the Integration of Vestibular Illusion Simulators into Ab-Initio Training

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Simulation Models in a Fluidity Test of the Al-Si Alloy

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Effect of Electric Ducted Fans Structural Arrangement on Their Performance Characteristics

Effects of Napping on Pilot Performance: An Experimental Study

Predictability of In-block Time Deviations: An Analysis of Operational Data, Tactical Flight Models and Meteorogical Information

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Unmanned aircraft propulsion system suitable for operations within spatially limited areas

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Design of Mirror System for Visual Illusion Induction

Design of Wearable Eye Tracker with Automatic Cockpit Areas of Interest Recognition

Displaying Additive Information in the Pilot’s Visual Field Using Augmented Reality Glasses

Effect of a Break in Flying on the Piloting Precision in Airline Pilots

Effect of Icing on the Unmanned Aerial Vehicle Propulsion Systems

Implementation of a vestibular illusion simulator into IR training

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Masks up: In-Flight Mild Hypoxia, Respiration and COVID-19

Návrh a způsob ověření Odborné přípravy ARFF

The adjustment of the tundish water model of continuous casting

The Influence of Fatigue on an Instrument Approach

Use of the Principal Component Analysis for Classification of Aircraft Components Failure Conditions Using Vibrodiagnostics

Utilization of Virtual Reality Into Sailplane to Airplane Transition Training

Detection of organic dyes by surface-enhanced Raman spectroscopy using plasmonic NiAg nanocavity films

Development of Flight Simulation Device for Perception Assessment

Device for Measuring Multicopters Performance Parameters

Effects of the High-Induction Magnetic Stimulation on Viscoelastic Properties of the Biceps Brachii

Influence of Fatigue on Pilot’s Physical Activity During 24-hour Experiments

Safety Study of Operation on More than One Type Under Air Operator Certificate

Souhrnná zpráva o výzkumu psychofyziologické kondice u pilotů a jejího vlivu na provedení závěrečné fáze přistání na letišti

Black Hole Approach: A Systematic Review

Effect of High-Induction Magnetic Stimulation on Complex Heart Rate Variability of Sus Scrofa Domesticus under General Anesthesia

Effect of Psychological Training on Pilot’s Performance

Objectivization of vacuum-compression therapy effects on micro- and macrovascular perfusion in type 2 diabetic patients

Pilots' performance and workload assessment: Transition from analogue to glass-cockpit

Portable Reaction Time Measurement Device: Prototype Proposal and Validation

Software solution for visualization and evaluation of flight data in terms of competency-based training

Subjective Evaluation of Fatigue in Pilots During 24-hour Testing

Validation of the Manual Indoor UAV Flying Characteristics Methodology

Lidé na fakultě
doc. Ing. Bc. Vladimír Socha, Ph.D.