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Ing. Jan Krčál, Ph.D.

rozklikni NABÍDKU

Publikace

informace pocházejí z univerzitní databáze V3S

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Jana Kaliková, Ph.D.; Sterba, R.
Publikováno:
2021, 2021 Smart Cities Symposium Prague (SCSP), New York, IEEE Press), ISBN 978-1-6654-1524-8, ISSN 2691-3666
Anotace:
The authors present the results of their practical research on the navigation of people with disabilities inside buildings using iBeacon technology. This technology's navigation potential lies in indoor use and everywhere, where GPS-like systems fail due to lack of coverage. Even though iBeacon technology is simple (it only broadcasts a signal), its potential is high if paired with suitable software. In such a case, it may not only serve as a navigation system, but also generate information. The authors used multi-criteria analysis to find out what type of iBeacon is the most suitable one for indoor navigation of people with disabilities. Their analysis also resulted into a set of recommendations for distribution and settings of iBeacon with respect of the topology of the building.
DOI:
10.1109/SCSP52043.2021.9447392
Typ:
Stať ve sborníku z prestižní konf. (Scopus)

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2019, PARIPEX - Indian Journal of Research, 8 (12), p. 50-53), ISSN 2250-1991
Anotace:
In this article,the authors write about passengers' mobility in complex transport terminals.The issue is usually dealt with within the scope of information systems that inform the passengers on the optimal route and the time needed to complete the transfer.The authors developed a methodology to calculate the time needed for the transfer with various transport infrastructure components on the transfer route.The methodology accounts for various groups of passengers (i.g.wheelchair users,passengers with a pram,elderly passengers).Based on this methodology,the authors developed an algorithm to calculate transfer times.The algorithm accounts for combinations of transport infrastructure components for various groups of passengers. Accurate knowledge of the total time needed to complete a transfer can help to optimise making bus/train connections or it can be used in Smart Cities applications.
DOI:
10.36106/paripex/8008725
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Jana Kaliková, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2018, PARIPEX - Indian Journal of Research, 11 (7), p. 438-440), ISSN 2250-1991
Anotace:
The authors tested the influence of neural network settings and the input data format on the success rate of biometric identification. Human ear was chosen as the biometric identifier, and its image was captured with a thermographic camera. The authors employed various scenarios to test the following. Firstly, various numbers of hidden layer neurons were tested. Secondly, various subpixel size of the input image, which directly affects the number of input layer neuron, was tested.
DOI:
10.15373/22501991
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2018, 2018 7th International Symposium on Next-Generation Electronics (ISNE), Piscataway, IEEE), ISBN 978-1-5386-1445-7, ISSN 2378-8607
Anotace:
The project deals with the implementation of new security elements to an access system designated for sites and premises that have to be protected against unauthorised entry or where access to certain parts of the site should be restricted. The electronic access system can substitute single key systems. The system offers a wide range of applications (registration and signalling of non-standard entries, forced entries, failure to close) and combination with external security systems. The access control system can be deployed separately or as a part of an attendance control system registering arrivals or adherence to prescribed working hours.
DOI:
10.1109/ISNE.2018.8394659
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2018, 2018 5th International Conference on Systems and Informatics (ICSAI), Piscataway, IEEE), ISBN 978-1-7281-0120-0
Anotace:
The article deals with the biometric identification of drivers, using an ear thermogram. Samples are acquired using an IR camera and then further evaluated by an artificial neural network. Input image data is acquired from a standardized distance at 5 different angles and the effect of the settings of the artificial neural network on the result of successful driver identification is studied.
DOI:
10.1109/ICSAI.2018.8599457
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Jana Kaliková, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2018, 2018 3rd International Conference on Intelligent Green Building and Smart Grid (IGBSG), Piscataway, IEEE), ISBN 978-1-5386-0661-2
Anotace:
Today almost everyone carries a mobile device. The authors test whether these devices may be used to ascertain the number of people in a building. The number of mobile devices present (number of persons) is determined using methods that capture network packets sent by mobile devices using the 802.11 protocol. The packets are captured using a Wi-Fi scanner, a hardware device that allows information to be gathered from 802.11/a/b/g/n/ac networks. The number of people in a building with an adequate count of Wi-Fi scanners may be determined with a definite probability which, aside from its statistical importance, might also be key in emergency situations in which it is imperative to determine how many people are inside a particular building.
DOI:
10.1109/IGBSG.2018.8393517
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Jana Kaliková, Ph.D.; Ing. Jan Krčál, Ph.D.; Kalivoda, K.
Publikováno:
2017
Anotace:
The F2P project aims for better security of indoor and outdoor areas using integration of mobile devices localization systems, CCTV systems and access control and identification systems. The aim of the project is development of SW module for ID system enhancing premises security by combining data from ID and localization systems.
Typ:
Výzkumná zpráva

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2017, 2017 Smart Cities Symposium Prague (SCSP) - IEEE PROCEEDINGS, New York, IEEE Press), p. 1-3), ISBN 978-1-5386-3825-5
Anotace:
People counting (detection) in public transport setting provides highly valuable information for transport lines planning in respect of their density, routes, timetables and vehicle occupancy. The real-time information on current number of passengers at given point enables the city councils together with the carriers to make significant improvements in line planning and resource use efficiency. Thus it allows lowering of their costs.
DOI:
10.1109/SCSP.2017.7973857
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2017, PARIPEX - Indian Journal of Research, 6 (2), p. 397-398), ISSN 2250-1991
Anotace:
The air traffic at non-towered airports has grown considerably in recent years. This increase in air traffic puts greater demands on both: the pilots and the dispatchers of the flight information service. The AFIS dispatchers, when gathering information on aircraft position, depend on voice communication with the pilots. Such a communication leaves room for error and inaccuracy. There are eighty-six non-towered airports in the Czech Republic at present. None of them operates a radar information based air traffic surveillance system. This paper describes a new system that increases safety in the Aerodrome Traffic Zone (ATZ) of non-towered airports. The authors of this paper are currently developing an A2A (Aircraft to Airport) system which will make possible an exchange of information between the person who provides AFIS and an aircraft through a mobile data network.
DOI:
10.15373/22501991
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Milan Koukol, Ph.D.; Ing. Marek Kalika, Ph.D.; Ing. Jan Krčál, Ph.D.; Ing. Radek Holý, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2016, 5th International Symposium on Next-Generation Electronics, ISNE 2016, Piscataway, IEEE Operations Center), p. 112-113), ISBN 978-1-5090-2439-1
Anotace:
The project deals with the implementation of new security elements to an access system designated for sites and premises that have to be protected against unauthorised entry or where access to certain parts of the site should be restricted. The electronic access system can substitute single key systems. The system offers a wide range of applications (registration and signalling of non-standard entries, forced entries, failure to close) and combination with external security systems. The access control system can be deployed separately or as a part of an attendance control system registering arrivals or adherence to prescribed working hours.
DOI:
10.1109/ISNE.2016.7543333
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2016, PARIPEX - Indian Journal of Research, 5 (12), p. 463-465), ISSN 2250-1991
Anotace:
This article deals with the transfer of persons with reduced mobility and orientation between different modes of transport. For these people, the transfer time depends on their mobility and their type of disability, and in most cases their need to choose a different transfer route than the majority of the population. This results in very different transfer times compared to the general population, creating greater time, orientation and physical demands on the persons. Given that this group includes elderly people and mothers with strollers, this issue is very topical. Knowledge of the total transfer time for a particular group can be used to optimize connections, or in Smart Cities applications.
DOI:
10.15373/22501991
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Jan Krčál, Ph.D.; Krčálová, L.; Heindl, M.; Sodomková, A.
Publikováno:
2016, Sborník příspěvků konference Young Transportation Engineers Conference 2016, Praha, České vysoké učení technické v Praze), ISBN 978-80-01-06016-2
Anotace:
The article treats determination of transfer times between different modes of public transportation for persons with reduced mobility and orientation. This group of persons often cannot use the same transfer route as the majority population and its transfer times therefore often significantly differ. Detailed knowledge of loss times of individual groups of persons on specific elements of transportation infrastructure, which constituted a route, allows determination of total transfer time required for a given group of persons. This information is essential for example when optimalising combination of various modes of public transportation or in applications Smart Cities.
Typ:
Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Milan Koukol, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2015, Smart Cities Symposium Prague 2015 Proceedings - Czech Technical University in Prague, Praha, České vysoké učení technické v Praze, Fakulta dopravní), p. 18-18), ISBN 978-80-01-05742-1
Anotace:
A goal of this article consists in demonstrating the eCall system enhancement. We propose to enhance the system by next relevant information for emergency services - exact number of persons in a vehicle including recognising adults and children, number of disabled persons and their disability kind. Further, the system will enable to identify a driver.
Typ:
Abstrakt ve sborníku z mezinár. konf. cizojazyčně

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Milan Koukol, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2015, 2015 Smart Cities Symposium Prague (SCSP), New York, IEEE Press), ISBN 978-1-4673-6727-1
Anotace:
A goal of this article consists in demonstrating the eCall system enhancement. We propose to enhance the system by next relevant information for emergency services – exact number of persons in a vehicle including recognising adults and children, number of disabled persons and their disability kind. Further, the system will enable to identify a driver.
DOI:
10.1109/SCSP.2015.7181563
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Krčálová, L.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2015, PARIPEX - Indian Journal of Research, 4 (11), p. 178-180), ISSN 2250-1991
Anotace:
Pedestrian crossings constitute an essential part of traffic infrastructure. This article deals with velocity of persons on pedestrian crossings. The pedestrians are divided into several groups in order to capture their different velocities. To define a group of persons with limited movement and orientation abilities we use the applicable legislation of the Czech Republic. We further describe in detail technical parameters of the pedestrian crossings and other factors influencing in a significant way velocity of persons on pedestrian crossings. A throughout understanding of velocity of persons on pedestrian crossings can influence the duration of the green light and as such play a role in designing light signal plans or in Smart Cities applications.
DOI:
10.15373/22501991
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Milan Koukol, Ph.D.; Ing. Jana Kaliková, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2015, Future Energy Electronics Conference (IFEEC), 2015 IEEE 2nd International, Piscataway, IEEE Operations Center), p. 1-4), ISBN 978-1-4799-7655-3
Anotace:
Concurrently, depending on increasing number of vehicles in cities, importance of incentive car-parks on peripheries, parking houses within shopping centres, airports, etc. constantly arises. At the same time, also demands on intelligent control such of these car-parks arise by reason of effective use of every parking spot. The proposed Parking Management Control System (PMCS) provides overview not only from the point of number of free spots but also number of spots intended for parents with children, handicapped persons, or XXL vehicles. In case, the vehicle is identified as one with permanently disabled persons, parents with children, or XXL vehicle then PMCS purposefully navigates this vehicle to a dedicated spot. During the certain time, the system knows actual positions of every vehicle, time spent on a car-parks, and its type.
DOI:
10.1109/IFEEC.2015.7361540
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Milan Koukol, Ph.D.; Ing. Jana Kaliková, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2015, PARIPEX - Indian Journal of Research, 4 (12), p. 26-28), ISSN 2250-1991
Anotace:
The objective of the article is to describe the equipment of a state–of–art vehicle with a passive people detection system. The detection is based on IR cameras installed in the vehicle interior. The system can identify the exact number of people in the car, distinguish adult persons from children and identify the driver. Moreover, the system goes with a RFID card reader that requires an active cooperation of passengers but it makes it possible to report to the system some other information such as passengers handicap, serious sickness or blood group. The system may be integrated to Smart Cities applications or eCall system.
DOI:
10.15373/22501991
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Jakl, F.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2015, 2015 Smart Cities Symposium Prague (SCSP), New York, IEEE Press), ISBN 978-1-4673-6727-1
Anotace:
An integral part of the concept of “smart cities” are information and orientation systems for visually impaired persons. This paper presents the results of the research of functionality trains system for visually impaired passengers in the Prague.
DOI:
10.1109/SCSP.2015.7181558
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Jakl, F.; Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2015, Smart Cities Symposium Prague 2015 Proceedings - Czech Technical University in Prague, Praha, České vysoké učení technické v Praze, Fakulta dopravní), p. 34-34), ISBN 978-80-01-05742-1
Anotace:
An integral part of the concept of "smart cities" are information and orientation systems for visually impaired persons. This paper presents the results of the research of functionality trains system for visually impaired passengers in the Prague.
Typ:
Abstrakt ve sborníku z mezinár. konf. cizojazyčně

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2015, ISBN 978-80-01-05742-1
Typ:
Sborník z mezinár. konf. cizojazyčně

Autoři:
Ing. Milan Koukol, Ph.D.; Ing. Radek Holý, Ph.D.; Ing. Jana Kaliková, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2015
Anotace:
Projekt se zabývá implementací nových bezpečnostních prvků do přístupového systému, který je určen pro objekty a prostory, kde je třeba zamezit vstupu neoprávněných osob, případně omezit vstup do určitých částí objektu. Elektronický přístupový systém slouží jako náhrada systémů jednotného klíče. Systém poskytuje široké možnosti využití (evidence a signalizace nestandartních vstupů-násilné vniknutí, nezavření) a napojení na externí bezpečností systémy. Přístupový systém může být nasazen samostatně nebo jako součást docházkového systému, který umožní vstup při evidenci příchodu nebo podle předepsané pracovní doby.
Typ:
Výzkumná zpráva v češtině

Autoři:
Ing. Milan Koukol, Ph.D.; Ing. Jan Krčál, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2015, Proceedings of The 4th International Symposium on Next-Generation Electronics, Piscataway, IEEE Operations Center), ISBN 978-1-4799-4208-4
Anotace:
At CTU FTS we are currently developing BioTest, an authentication system for testing students using state-of-the-art information technology and unambiguous Biometric authentication for each user. We use this system for identification during exams and testing. The BioTest software operates on the basis of a student's face recognition comparing the pattern with data on the student's ID card, while informing the relevant teacher about the student's identity.
DOI:
10.1109/ISNE.2015.7131948
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
doc. Ing. Martin Leso, Ph.D.; Konopáč, T.; Ing. Bc. Dušan Kamenický, Ph.D.; Ing. Milan Marvan; Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2014
Anotace:
Studie pro SŽDC provádějící analýzu dopadů změn norem a dalších návrhovaných technických opatření.
Typ:
Výzkumná zpráva v češtině

Autoři:
Krčálová, L.; Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2014, Mezinárodní Masarykova konference pro doktorandy a mladé vědecké pracovníky 2014, Hradec Králové, MAGNANIMITAS), p. 3117-3121), ISBN 978-80-87952-07-8
Anotace:
The paper discusses the data collection for route mapping for persons with limited mobility and sense of orientation. It defines the term of persons with limited mobility and sense of orientation and legislative framework of the issue. The article focuses on the issue of route mapping, its markings using semaphore's convention and of problems of parameters measurement of the elements of transport infrastructure and of data collection.
Typ:
Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.; prof. Ing. Tomáš Zelinka, CSc.
Publikováno:
2014, Proceedings of the 18th Word Multi-Conference on Systemics, Cybernetics and Informatics, Orlando, Florida, International Institute of Informatics and Systemics), p. 95-99), ISBN 978-1-941763-04-9
Anotace:
Electronic information systems are an integral part of transportation arrangements in every city. They are built with the aim to offer to its constituents various services and to facilitate their orientation in a complex transportation network. These systems, however, do not necessarily take into consideration the needs of the handicapped, for example the visually impaired, although precisely this group needs correct and aptly transmitted information more than any other segment of the population. This article highlights the basic concept of the expansion of the current transportation information system in the Czech Republic by employing the Near Field Communication technology for the visually impaired passengers.
Typ:
Vyzvaná předn. uvedená ve sborníku z mezinárodní konf.

Autoři:
Ing. Jana Kaliková, Ph.D.; Ing. Milan Koukol, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2014, Proceedings of 2014 International Conference on Intelligent Green Building and Smart Grid, Piscataway, IEEE Operations Center), p. 1-3), ISBN 978-1-4673-6123-1
Anotace:
Safety in public buildings is obtained by technical means employed in hazardous situations (accident, fire etc.). In case of an emergency, endangered premises can be evacuated by emergency exits, while the monitoring center monitors the situation and activates the pre-prepared contingency plans to enable safe (managed) evacuation. Special attention needs to be paid to the handicapped persons. Their impediments (blindness, restricted movement etc.) pose extra challenge, when in the ensuing chaos or panic they try to find emergency or barrier-free exits. This article describes a proposal for expansion of the existing evacuation systems by elements of localization of the handicapped persons in buildings. The aim is to provide this information to the rescue teams and thus improve the evacuation capacities for the handicapped.
DOI:
10.1109/IGBSG.2014.6835240
Typ:
Stať ve sborníku z prestižní konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Milan Koukol, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2014, PARIPEX - Indian Journal of Research, 3 (XI), p. 127-129), ISSN 2250-1991
Anotace:
In road tunnels, safety is ensured by technical means (sensors, emergency exits), whose purpose is to help resolve dangerous situations. In case of emergency, people can escape from the dangerous areas through emergency exits, while the Tunnel Control Center (TCC) monitors the situation and triggers previously developed emergency scenarios to carry out controlled evacuation of all persons. This paper describes a proposal of extension of the existing evacuation systems with vehicle localization elements including monitoring the number of persons in given tunnel section with the aim of providing this information to the emergency services and enhancing the possibility of escaping from the tunnel safely.
DOI:
10.15373/22501991
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.; prof. Ing. Tomáš Zelinka, CSc.
Publikováno:
2014, Journal of Systemics, Cybernetics and Informatics, 12 (4), p. 59-63), ISSN 1690-4524
Anotace:
This article highlights the basic concept of the expansion of the current transportation information system in the Czech Republic by employing the Near Field Communication technology for the visually impaired passengers. Nowadays are electronic information systems an integral part of transportation arrangements in every city. They are built with the aim to offer to its constituents various services and to facilitate their orientation in a complex transportation network. These systems, however, do not necessarily take into consideration the needs of the handicapped, for example the visually impaired, although precisely this group needs correct and aptly transmitted information more than any other segment of the population.
Typ:
Článek v odborném recenzovaném periodiku

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2014, Proceedings of the International Conference on Information and Communication Technology for Education, Singapore, International Association of Computer Science and Information Technology Press), p. 25-32), ISSN 1743-3517
Anotace:
Every developed society features an elaborated transportation information system to facilitate orientation. Such information system must offer real-time data (information) with high degree of reliability and security, taking into consideration its constituents. This article focuses on visually impaired persons, a chief group among these constituents and highlights the possibilities of a superstructure to the existing transportation information systems in the Czech Republic.
DOI:
10.2495/ICTE130041
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.; Krčálová, L.
Publikováno:
2013, 4th International Conference on New Horizons in Education, Oxford, Elsevier Science), p. 543-550), ISSN 1877-0428
Anotace:
Modern society should make higher education accessible to all gifted students, regardless of their economic situation, religion, or health. The society should strive to fulfill the right to freedom of movement of its citizens by removing barriers, in order to integrate the handicapped citizens. This article deals with accessibility to the Czech Technical University in Prague by the handicapped students and their options for successful studies.
DOI:
10.1016/j.sbspro.2013.12.062
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2013, Proceedings of the Second International Conference on Informatics & Applications, Lodz, Lodz University of Technology), p. 306-310), ISBN 978-1-4673-5255-0
Anotace:
The visually impaired persons are a significant group among the users of public transportation. They should therefore be allowed to travel as independently and safely as possible. Particularly independence is crucial for psychological wellbeing of persons with any handicap. This paper provides an overview of regulations currently in force in the Czech Republic dealing with movement of persons with limited movement and orientation capability and of applied solutions for the visually impaired persons. The core of the paper is a proposal for expansion of the current transportation information system at the bus terminal for an independent and safe movement of the visually impaired persons. The paper also proposes performance indicators for the expanded transportation information system.
DOI:
10.1109/ICoIA.2013.6650274
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2013, 20th Anniversary of the Faculty of Transportation Sciences, Czech Technical University in Prague - Selected Papers, Praha, České vysoké učení technické v Praze, Fakulta dopravní), p. 192-197), ISBN 978-80-01-05320-1
Anotace:
Departure of vehicles from a light-controlled intersection is one of the characteristics which allows us describe behavior of a traffic flow. In order to manage traffic on light-controlled intersections or in the entire traffic networks, it is imperative to describe this behavior with the most accurate mathematical apparatus. Computation of traffic management is determined by a model, according to which vehicles on an intersection set into motion upon the green signal, although in order to reflect today‘s traffic conditions, I prefer to propose using the red-yellow signal. This model is called the departure model. It is defined by the time necessary for a vehicle standing in a queue to cross a reference point after the onset of the green signal. One of the aims of this article is to describe and verify a new mathematical apparatus for departure of vehicles from an intersection – departure model, which would take into account both the preceding vehicles and other parameters influencing departure of vehicles from an intersection. This model is called the basic model. It focuses on simple situations, when a vehicle departs from an intersection without being detained by other vehicles or pedestrians. Additional aim of in this article is to create and describe the methodology for a departure model, which could be used for any intersection, i.e. a set of models from which the most suitable one would be chosen for a given intersection. This model is called the expanded departure model. In order to arrive at such a complex solution, it is suitable to create a model based on a mathematical apparatus of mixture distribution.
Typ:
Stať ve sborníku z fakultní konference cizojazyčně

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2013, ISBN 978-80-01-05416-1
Typ:
Sborník z fakultní konference cizojazyčně

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2013, Proceedings of the 11th European Transport Congress, Praha, České vysoké učení technické v Praze, Fakulta dopravní), p. 111-114), ISBN 978-80-01-05321-8
Anotace:
This article provides an overview of acoustic adjustments for visually impaired persons in the Czech Republic. The core of the article is a proposal for expansion of the current transportation information system at the bus terminal for an independent and safe movement of the visually impaired persons. The article also proposes performance indicators for the expanded transportation information system.
Typ:
Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2013, ISBN 978-80-01-05415-4
Typ:
Sborník z fakultní konference cizojazyčně

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2013, PROCEEDINGS OF THE INTERNATIONAL SCIENTIFIC CONFERENCE MODERN SAFETY TECHNOLOGIES IN TRANSPORTATION, Košice, PERPETIS S.R.O.), p. 95-100), ISBN 978-80-971432-1-3, ISSN 1338-5240
Anotace:
Traveling can pose a particular challenge to the handicapped. Persons with disabilities, including the visually impaired, must overcome a series of barriers. This needs to be taken into consideration when designing transportation information systems. This article outlines the use of the NFC technology, commonly used in the banking industry, in the information systems, with the aim to increase th accessibility of these systems.
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Krčálová, L.; Ing. Mgr. Michal Jeřábek, Ph.D.; prof. Ing. Zdeněk Votruba, CSc.
Publikováno:
2012, 3rd International Conference on New Horizons in Education, Amsterdam, Elsevier Science), p. 963-970), ISSN 1877-0428
Anotace:
The article discusses project-oriented study at the Czech Technical University in Prague, Faculty of Transportation Sciences. Study with project-oriented component prepares students of bachelor and master study programmes for their careers by exposing them to concrete problem-solving already during the course of their studies. Work on a project, i.e. on a real task commissioned by an external entity, requires students to apply acquired practical knowledge. Inseparable part of the practical problem-solving is team work with other students, academics and scientists. Project study reinforces preparation of students for solving expert problems in their future jobs and thus significantly increases their employment potential. The article further discusses advantages and disadvantages of project-oriented study and statistical data from the last three project recruitments.
DOI:
10.1016/j.sbspro.2012.09.586
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2011, Workshop 2011, Praha, České vysoké učení technické v Praze), p. 1-5)
Anotace:
Departure models deal with departure of vehicles from the entrance space. They help us determine what time a particular vehicle in a queue needs to cross the STOP line. The models hitherto used are not very accurate. The author tries to fill this gap by creating a significantly more accurate model, which could be used to manage traffic on a light-controlled intersection. On the following pages, the author introduces a new approach to a departure model. It should be universally applicable on any intersection or for any traffic situation, eliminating the need to create a specific model for each individual intersection. The author proposes a set of models, from which the most suitable model would be chosen for a given situation. In order to find such a complex solution, it will be necessary to create a mathematical model, proceeding from a special type of multidimensional regression model. It would be further expanded to a model of mixture distribution and its estimation, where each component of the model would reflect specific characteristics of a location where the intersection lies. This approach could be applied not only in simple cases, when the departing vehicle is not detained by any external factor, such as other vehicles, pedestrians etc., but also in more complicated cases, when the departing vehicle, for example, gives way to pedestrians upon turning. This has a significant impact on departure of all vehicles queuing behind it. Such a departure model should have a higher accuracy of prediction of departure times, compared to the hitherto used models, and would be adaptable to time and location of its application.
Typ:
Stať ve sborníku Workshop ČVUT

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2011, Proceedings of the International Scientific Conference Modern Safety Technologies in Transportation, Košice, SUPREMA Ltd.), p. 261-264), ISBN 978-80-970772-0-4, ISSN 1338-5232
Anotace:
The article describes the various issues departure models in terms of their use on real data and comes with a custom design solution based on the mathematical apparatus of mixture distributions.
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.; doc. Ing. Ivan Nagy, CSc.
Publikováno:
2010, Latest Trends on Communication & Information Technology, New York, WSEAS Press), p. 101-104), ISBN 978-960-474-207-3, ISSN 1792-4316
Anotace:
Computation of traffic management is dependent upon a model, which determines the headway of vehicles in the intersection upon a green signal "go" - this is called a departure model. Hitherto used models have been based solely on individual observations and quest for an appropriate artificial function, which would respect these observations. However, such models turn out to be inaccurate and their application in transportation management is problematic - they are only applicable for those intersections, on which the data was collected at a given time, without relationship to other variables impacting departure of vehicles (such as geometrical order, departure direction, road angle etc.). The article describes a lay out of a departure model by creating a new complex mathematical apparatus.
Typ:
Stať ve sborníku z lokální konf.

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jana Kaliková, Ph.D.; Ing. Marek Kalika, Ph.D.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2010, ISBN 978-80-01-04606-7
Anotace:
Skripta vznikla na základě přednášek a cvičení autorů na Fakultě dopravní ČVUT v Praze v letech 2006 až 2010. Jsou v prvé řadě určena studentům bakalářského studia všech studijních oborů a obou forem studia. Slouží jako výchozí studijní materiál pro předmět Databázové a prezentační systémy, resp. Databázové systémy (reakreditovaný bakalářský program na 3 roky).
Typ:
Vysokoškolské skriptum v češtině

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.; Ing. Lukáš Svoboda; Krčálová, L.
Publikováno:
2010, Workshop 2010, Praha, České vysoké učení technické v Praze), p. 52-53), ISBN 978-80-01-04513-8
Anotace:
Information is very valuable and strategic element. Information is more valuable sooner the recipient receives it. So it is important deliver information punctually to right person. We lack for information system at Faculty of Transportation Science by which it could be possible to send information by message quickly and simply. The idea to make such information system comes into existence.
Typ:
Stať ve sborníku Workshop ČVUT

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2010
Anotace:
Tato práce souhrnně zpracovává problematiku odjezdového modelu, včetně studií mnoha autorů, kteří se odjezdovým modelem resp. odjezdovými intervaly či vstupními časy, zabývali. Použití známých odjezdových modelů se ukázalo v praxi jako nevyhovující, proto byl vytvořen nový matematický aparát pro odjezdový model. Ten je postaven nejen na znalosti odjezdu předchozího vozidla, ale hlavně na parametrech, které ovlivňují odjezdy jednotlivých vozidel a které jsou např. specifické pro danou křižovatku. Takovýto odjezdový model vykazuje vyšší přesnost predikce než dosud používané modely. Dále byla vytvořena a ověřena metodologie odjezdového modelu postavená na matematickém aparátu směsi distribucí. Cílem bylo navrhnout takové komplexní řešení odjezdového modelu, které by bylo možné aplikovat na libovolnou křižovatku a bylo tak adaptabilní vůči času a lokalitě jeho aplikace.
Typ:
Disertační práce (PhD)

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2010, Mezinárodní Baťova konference, Zlín, Universita Tomáše Bati ve Zlíně), p. 109-114), ISBN 978-80-7318-922-8
Anotace:
Pro řízení dopravy na světelně řízených křižovatkách je velmi důležité mít co nejpřesnější matematický aparát, který nám umožní popsat, jak se na nich dopravní proud chová. Dosavadní modely byly konstruovány výhradně na jednotlivých pozorováních a hledání vhodné umělé funkce, která by tato pozorování respektovala. Takové modely se v praxi ukazují jako velmi nepřesné a jejich použití pro řízení dopravy je velmi problematické. V tomto článku je porovnán nově vytvořený odjezdový model s již známými odjezdovými modely.
Typ:
Stať ve sborníku z lokální konf. česky

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2009, CD s recenzovanými příspěvky z Mezinárodní Baťovy konference pro doktorandy a mladé vědecké pracovníky 2009, Zlín, Univerzita Tomáše Bati ve Zlíně, Fakulta managementu a ekonomiky), p. 1564-1570), ISBN 978-80-7318-812-2
Anotace:
Ukládání a práce se znalostmi jsou fundamentálním požadavkem ve znalostních systémech. Pro ukládání jsou používány databázové systémy a pro práci se znalostmi lze využít logické programování. Obojí v sobě kombinuje deduktivní databáze, která umožňuje odvozování faktů na základě pravidel a znalostní báze. Článek se zabývá deduktivními databázemi a nastiňuje jejich princip.
Typ:
Stať ve sborníku z lokální konf. česky

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2009, Proceedings of First International Conference on Modelling and Development of Intelligent Systems, Sibiu, Lucian Blaga University of Sibiu), p. 115-120), ISSN 2067-3965
Anotace:
For control the traffic on traffic lights controlled intersections is very important to understand the behavior of the traffic flow. Just today it can be very difficult regulate the transport network, without this knowledge, which are very complicated. Movement of vehicles on traffic lights controlled intersections is determined by many characteristics, which are for regulate or modeling of the traffic flow essential. Departure model is just one of these characteristics. It is about finding the time, they need vehicles to leave the space ahead from stop line after the appearance of the green light. The resulting time is affected many factors that are more or less relevant. Our aim is to create a new mathematical model, that can take into account these factors, found by between dependence and thus was more accurate for the specific intersections.
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.; doc. Ing. Ivan Nagy, CSc.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2009, Proceedings of the 2009 Euro American Conference on Telematics and Information Systems: New Opportunities to increase Digital Citizenship, New York, ACM), p. 198-201), ISBN 978-1-60558-398-3
Anotace:
In the light of today´s high traffic volume, it is crucial to anticipate the traffic flow on traffic lights controlled intersections. Without this knowledge, it would be impossible to control the traffic in complicated hubs, such as, for instance, those in Prague. One of the characteristics, through which we can describe dynamics of vehicle movement on traffic lights controlled intersections, is the interval between departure of a vehicle from the space in front of the stop line and the arrival to the actual stop line. This is called a departure model. Our aim is, first, to create an appropriate mathematical application, which would take into account individual variables influencing departure of individual vehicles and determine the dependence among these variables. Second to create such a departure model, which would, on one hand, correspond as much as possible to the contemporary traffic situations, but on the other hand, be more exact for specific intersections.
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2009, CD s recenzovanými příspěvky z Mezinárodní Baťovy konference pro doktorandy a mladé vědecké pracovníky 2009, Zlín, Univerzita Tomáše Bati ve Zlíně, Fakulta managementu a ekonomiky), p. 1559-1563), ISBN 978-80-7318-812-2
Anotace:
Znát chování dopravního proudu na světelně řízených křižovatkách je v dnešní době, vysoké motorizace, velmi důležité. Bez těchto znalostí není možné správně řídit dopravu v takových složitých dopravních sítích jako je třeba Praha. Jednou z charakteristik, kterou můžeme popsat dynamiku pohybu vozidla na světelně řízené křižovatce, je odjezd vozidla z předřazovacího prostoru až ke STOP čáře. Této charakteristice říkáme odjezdový model. Naší snahou je identifikovat jednotlivé parametry, které ho ovlivňují, zjistit mezi nimi závislosti a vytvořit matematický model, který bude co nejvíce odpovídat současné dopravní situaci.
Typ:
Stať ve sborníku z lokální konf. česky

Autoři:
Ing. Jan Krčál, Ph.D.
Publikováno:
2009, Proceedings of the 8th WSEAS International Conference on DATA NETWORKS, COMMUNICATIONS, COMPUTERS (DNCOCO '09), New York, WSEAS Press), p. 195-198), ISBN 978-960-474-134-2, ISSN 1790-5109
Anotace:
Departure model is one of the characteristics, through which we can describe traffic flow on signalized intersections. Management of such intersections or of entire traffic networks requires a highly accurate mathematical model, through which the traffic behavior can be described. There is a direct relationship between the accuracy of such a mathematical model and the accuracy of subsequent simulations of behavior of a traffic intersection. Based on these, we can subsequently control the traffic. The departure model expresses the time necessary for an individual vehicle (standing in a queue) to leave the pre-shifting area after the green light has been signaled. In this article, a new mathematical model is compared with a hitherto model, which is, based on experience and simulations, not fully relevant today. The new model attempts to consider parameters, which influence the resulting departure times. This should render the model more accurate.
Typ:
Stať ve sborníku z lokální konf.

Autoři:
Ing. Martin Jacura, Ph.D.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2009, Pražská technika, 2009 (3), p. 20-20), ISSN 1213-5348
Typ:
Článek v populárně vědeckém periodiku česky

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2008, Pedagogický software 2008, České Budějovice, Scientific Pedagogical Publishing), p. 395-397), ISBN 80-85645-59-9
Anotace:
Příspěvek popisuje výsledek projektu Prakticky orientovaná inovace výuky předmětů "Návrh a programování databází" a "Tvorba interaktivních internetových aplikací" na FD.
Typ:
Stať ve sborníku z lokální konf. česky

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jan Krčál, Ph.D.
Publikováno:
2008, Proceedings of the Junior Scientist Conference 2008, Vienna, Vienna University of Technology), p. 43-44), ISBN 978-3-200-01612-5
Anotace:
This article contains part of the results of a research which focused on finding the best way to manage a traffic lights controlled crossing. A simulation model, which includes the crossing and the traffic on it, has been created to achieve this. The simulation model has been created in a mathematical program "Matlab", which currently tests static, dynamic and fuzzy control. To assess the expediency of these types of control, tests under different levels of traffic intensity have been carried out.
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2008, Proceedings of Workshop 2008, Praha, Czech Technical University in Prague), p. 160-161), ISBN 978-80-01-04016-4
Anotace:
The aim of this contribution is to report on the results of the project Practically Oriented Innovation in Subjects "Design and Programming of Database" and "Creation of Interactive Web Applications" at the Faculty of Transportation Sciences of the CTU, supported by the Universities Development Fund of the Czech Republic in 2007.
Typ:
Stať ve sborníku Workshop ČVUT

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.; Ing. Jana Kaliková, Ph.D.
Publikováno:
2008, The Present and Future of Modern Transport, Praha, Czech Technical University in Prague), p. 151-152), ISBN 978-80-01-04056-0
Anotace:
The aim of this paper is to present a search module for traffic knowledge system (TKS). The commonly used full-text search returns only those documents, which contain the queried term, without the knowledge of its relationship or its meaning vis-à-vis this term. The resulting list of documents returned by the full-text search is ordered by the level of occurrence of the searched term in a particular document. Nevertheless, such a list can also contain irrelevant documents or more relevant documents can appear only behind those less relevant ones. This problem is addressed in the proposed search module by using domain ontology, fuzzy set, and logic to capture the semantics in searched terms.
Typ:
Stať ve sborníku z mezinár. konf. cizojazyčně

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2008, Computers and Simulation in Modern Science, Athens, WSEAS Press), p. 231-233), ISBN 978-960-474-032-1
Anotace:
These days, probably nobody is able to conceive of transportation without information systems ensuring itssafety, facility, working-load optimization, economic savings in transportation, etc. Transport knowledge systems resolutely finding their exercise in transportation and complementing transport information systems represent other information technologies. However, these systems do not provide "only" information - nevertheless substantial for decision making - but outright knowledge. Every knowledge system should be able to answer its users´ queries and, therefore, capability to search only relevant answers among plenty of all possible ones should be its integral part. Introduction of a searching module for the transport knowledge system with which the authors has dealt represents this contribution goal.
Typ:
Kapitola v jiné knize

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2008, 6th Conference of European Students of Traffic and Transportation Sciences, Žilina, Žilinská univerzita), p. 52-55), ISBN 978-80-8070-870-2
Anotace:
The paper focuses on the simulation program, which has been created for the modelling of the traffic intersection controlling system. This simulation program has been created in terms of research purpose and it is able to simulate not only the static, but also the dynamic and fuzzy controlling systems of a crossing. The functionality of the program has been verified with real data from the field survey; this approach also enabled to compare the practically used departure models and to design our own departure model.
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2008, 6th Conference of European Students of Traffic and Transportation Sciences, Žilina, Žilinská univerzita), p. 52-55), ISBN 978-80-8070-869-6
Anotace:
The paper focuses on the simulation program, which has been created for the modelling of the traffic intersection controlling system. This simulation program has been created in terms of research purpose and it is able to simulate not only the static, but also the dynamic and fuzzy controlling systems of a crossing. The functionality of the program has been verified with real data from the field survey; this approach also enabled to compare the practically used departure models and to design our own departure model.
Typ:
Stať ve sborníku z mezinár. konf.

Autoři:
Ing. Mgr. Michal Jeřábek, Ph.D.; Krčálová, L.; Ing. Jan Krčál, Ph.D.
Publikováno:
2007, Proceedings of Workshop 2007, Praha, České vysoké učení technické v Praze), p. 140-141), ISBN 978-80-01-03667-9
Anotace:
The goal of this article is provide a result of the CTU internal grant regarding to method of construction scheme of object database to using in data mining and to available methods of data mining for object databases.
Typ:
Stať ve sborníku Workshop ČVUT

Autoři:
Ing. Martin Jacura, Ph.D.; Ing. Jan Krčál, Ph.D.; Krčálová, L.
Publikováno:
2006, Pražská technika, - (3), p. 17-17), ISSN 1213-5348
Anotace:
Příspěvek popisuje konferenci "Prezentace projektů", její průběh a význam. Na konferenci studenti představují jednotlivé projekty, na kterých pracují v rámci výuky na ČVUT v Praze Fakultě dopravní, svým spolužákům z nižších ročníků.
Typ:
Článek v populárně vědeckém periodiku česky

Autoři:
Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2006, Pedagogický software 2006, České Budějovice, Scientific Pedagogical Publishing), p. 43-45), ISBN 80-85645-56-4
Anotace:
Příspěvek se zabývá problematikou visuálníhi návrhu databázových struktur pomocí programu CASE Studio.
Typ:
Stať ve sborníku z lokální konf. česky

Autoři:
Krčálová, L.; Ing. Jan Krčál, Ph.D.; Ing. Mgr. Michal Jeřábek, Ph.D.
Publikováno:
2006, Pedagogický software 2006, České Budějovice, Scientific Pedagogical Publishing), p. 51-53), ISBN 80-85645-56-4
Anotace:
Stať rozebírá problematiku zkvalitnění výuky předmětu Databázové systémy na FD ČVUT
Typ:
Stať ve sborníku z lokální konf. česky