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Dive into the research topics where Piotr Bojar is active.

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Featured researches published by Piotr Bojar.


Journal of Konbin | 2008

Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments.

Maciej Woropay; Piotr Bojar; Mirosław Szubartowski

Assessment of the Level of Undesirable Actions of People Involved in Road Transport Systems and their Environments. Road transport systems are socio-technical systems of the type Human - Technical object- Environment . In these systems hazards can be caused by: the man C, the technical object OT, and influence of the environment on the technical object and people who are present in the system and its environment. The authors of the paper make an attempt to evaluate the level of threats resulting from intended or not intended actions of people situated in this environment. Ocena Poziomu Niepożądanych Oddziaływań Ludzi Usytuowanych W Systemach Transportu Drogowego I Ich Otoczeniu. Systemy transportu drogowego są systemami socjotechnicznymi typu Człowiek — Obiekt Techniczny — Otoczenie . W systemach tych zagrożenia mogą być stwarzane przez: człowieka C, obiekt techniczny OT oraz przez oddziaływanie otoczenia O na obiekt techniczny i ludzi znajdujących się w systemie oraz w jego otoczeniu. W pracy podjęto próbę oceny poziomu zagrożeń wynikających z zamierzonych lub niezamierzonych działań ludzi usytuowanych systemach transportu drogowego oraz ich otoczeniu.


Journal of KONES | 2015

Road transport systems safety criteria

Piotr Bojar; Maciej Woropay

Identification of boundary values and features which describe a system operation safety is a crucial problem for assessment of the system operation safety. In this article, an attempt to match features necessary for a description of a given system operation safety and determine their boundary values, has been made. Determination of boundary values of safety features will allow to evaluate the system safety level. The following variables have been accepted as safety features: the number of accidents, the number of fatalities, and the number of people injured in those accidents. According to these values, probability values of the numbers of people who were killed and who were injured in those accidents have been established. Probability value equal to zero has been accepted as the intentional state, the interval between 0 and the mean value of a given feature determines the acceptable state, the interval between the mean value of a given feature probability and value 0.1 determines the boundary state, whereas all features assuming values higher than 0.1 refer to the system critical state. The presented research results are considered as directives for development of safety criteria for road transport systems and determination of their critical values. The proposed method of boundary values determination can be used for assessment of safety for different transport systems.


Journal of Konbin | 2010

Use of Analtic Hierarchy Process for Assessment of Transport System Operation Safety

Maciej Woropay; Piotr Bojar; Michał Pająk

Transport systems are socio-technical systems in which accomplishment of a direct task is the responsibility of an executive subsystem made up of elementary subsystems of the type—technical object (operator–transport means) carrying out tasks within the system surroundings. Due to the presence of people in the transport system, the most significant criterion for the assessment of carried out rides is their safety. The safety level of carried out transport tasks is affected by threats posed by forcing factors which have an influence on the elementary executive system. These factors can be divided into: (1) operational; (2) external; and (3) antropotechnical. Due to the complex nature of the analyzed systems, the authors of the paper have made an attempt to evaluate the influence of these factors on the system operational safety.Transport systems are socio-technical systems in which accomplishment of a direct task is the responsibility of an executive subsystem made up of elementary subsystems of the type—technical object (operator–transport means) carrying out tasks within the system surroundings. Due to the presence of people in the transport system, the most significant criterion for the assessment of carried out rides is their safety. The safety level of carried out transport tasks is affected by threats posed by forcing factors which have an influence on the elementary executive system. These factors can be divided into: (1) operational; (2) external; and (3) antropotechnical. Due to the complex nature of the analyzed systems, the authors of the paper have made an attempt to evaluate the influence of these factors on the system operational safety.


Journal of Konbin | 2016

Influence of Malfunctions of Selected Bus Subsystems on Bus Transportation Safety

Piotr Bojar; Maciej Woropay; Klaudiusz Migawa

Abstract This article introduces division of transport systems into land transport systems (road and rail) as well as land and water transport systems (inland and sea), depending on the type of environment in which these systems carry out their tasks. Such systems comprise the class of social engineering systems of the Man – Technological Object – Environment (M – TO – E) type. Such systems are influenced by forcing factors, leading to changes in their condition. Such factors may be divided into operational, external and anthropotechnical and they cause the degradation of the system on various levels, including a decrease of the degree of its safety. The article attempts to evaluate the safety of the operation of transport systems on the basis of the evaluation of the safety of the transport process carried out over a defined time interval Δt. The evaluation of the safety of the implemented transport process was prepared on the basis of a set of calculated index values determined depending on the type of transport.


Journal of Konbin | 2015

The Analysis and Evaluation Assessment of Safety of Selected Types of Exploitation Systems Means of Transport / Analiza i Ocena Porównawcza Bezpieczeństwa Działania Wybranych Typów Systemów Eksploatacji Środków Transportowych

Łukasz Muślewski; Piotr Bojar; Łukasz Muciok; Michał Lewalski

Abstract In a situation of increasing the supply of means of individual transport and not capable of following the development of infrastructure, an important issue is the issue of ensuring adequate levels of efficiency, safety and the competitiveness of the operation of the exploitation of public transport services. Factors affecting the safe operation pending exploitation systems of vehicles, in a differentiated way affect the level of safety provided services in smaller cities - up to 100 thousand inhabitants, with respect to the cities which are agglomerations of more complex structure, which are cities the number to 500 thousand inhabitants. This paper attempts to analyze and evaluate the safety of the operation of the public transport services exploitation, on the basis of the same assessment criteria, comparing two different sized urban areas. Streszczenie W sytuacji wzrastającej podaży środków transportu indywidualnego i nie nadążającym za nim rozwojem infrastruktury, istotnym zagadnieniem staje problematyka zapewnienia odpowiedniego poziomu efektywności, bezpieczeństwa oraz konkurencyjności działania systemów eksploatacji środków transportu miejskiego. Czynniki wpływające na bezpieczeństwo działania rozpatrywanych systemów eksploatacji środków transportowych, w zróżnicowany sposób wpływają na poziom bezpieczeństwa realizowanych usług w mniejszych miastach - do 100 tyś. mieszkańców, względem miast stanowiących aglomeracje, o bardziej skomplikowanej strukturze, jakimi są miasta o liczbie do 500 tyś. mieszkańców. W pracy podjęto próbę analizy i oceny bezpieczeństwa działania systemów eksploatacji środków transportu miejskiego, na podstawie tych samych kryteriów ocenowych, porównując dwa różnej wielkości obszary miejskie.


Journal of Konbin | 2013

Assessment of the Influence of the Human Factor on Safety of the Transportation Process / Ocena Wpływu Czynnika Ludzkiego Na Bezpieczeństwo Procesu Transportowego

Piotr Bojar; Maciej Woropay; Mirosław Szubartowski; Michał Bacior

Abstract Safety of the transport process is a criterion of top priority for a transportation system operation and maintenance. It is of special importance in case of public municipal transportation. Systems of this type operate in specific road conditions: increased intensity of traffic during a day and night, a big number of pedestrians as well as drivers of other vehicles. In such conditions the human factor and its impact on the transport system operation is of key importance. A human can be involved in the transportation system as a driver, passenger, pedestrian, or in another way (cyclist, motorcyclist). Improper behavior of people account for 36% - 46% of road accident causes defined as undesirable events occurred within the space of the road. In this paper there has been mad an attempt to evaluate the transportation system from the point of view of people present in the transportation system and its environment. Streszczenie Bezpieczeństwo realizowanego procesu transportowego jest priorytetowym kryterium działania systemów transportowych. Szczególnie ważne jest to w przypadku systemów zbiorowego transportu miejskiego. Systemy tego typu podlegają szczególnym warunkom ruchu: wzmożone natężenie ruchu w ciągu doby, duża liczba pieszych uczestników ruchu drogowego jak również kierowców pojazdów obcych. W takich warunkach szczególnie istotnym jest czynnik ludzki i jego oddziaływania na system transportowy. Człowiek w systemie transportowym usytuowany może być jako kierowca pojazdu, jego pasażer, pieszy w otoczeniu lub inny uczestnik ruchu (rowerzysta, motocyklista). Niewłaściwe oddziaływania ludzi stanowią 36% a 46% przyczynę powstawania zdarzeń drogowych definiowanych jako zdarzenia niepożądane zaistniałe w obszarze przestrzeni drogowej. W pracy podjęto próbę oceny systemu transportowego z punktu widzenia działań ludzi usytuowanych w systemie i jego otoczeniu.


Journal of Konbin | 2012

The Method of Assessment of Transport Safety / Metoda Oceny Bezpieczeństwa Procesu Transportowego

Piotr Bojar; Maciej Woropay; Mirosław Szubartowski; Michał Bacior

Abstract This article introduces classification of transport systems into land transport systems (road and rail) as well as land and water transport systems (inland and sea), depending on the type of environment in which these systems carry out their tasks. Such systems fall under the class of social engineering systems of the Man - Technological Object - Environment (M - TO - E) type. Such systems are influenced by forcing factors, leading to changes in their states. Such factors may be divided into operational, outside and anthropotechnical and they influence the system on various levels, including degradation of the degree of its safety. The article attempts to evaluate the safety of the operation of transport systems on the basis of the evaluation of the safety of the transport process carried out over a defined time interval Δt. Streszczenie W pracy dokonano klasyfikacji systemów transportowych na systemy: transportu lądowego (drogowego i kolejowego), transportu powietrznego i wodnego (śródlądowego i morskiego), w zależności od rodzaju otoczenia, w którym systemy te realizują swoje zadania.Systemy te należą do klasy systemów socjotechnicznych typu Człowiek - Obiekt Techniczny - Otoczenie, . Na systemy te oddziaływają czynniki wymuszające powodujące zmiany ich stanów. Czynniki te można podzielić na: robocze, zewnętrzne i antropotechniczne, które w różnym stopniu oddziaływają na system i w różny sposób wpływają na jego degradację, powodującą obniżenie poziomu bezpieczeństwa jego działania. W pracy podjęto próbę oceny bezpieczeństwa działania systemów transportowych na podstawie oceny bezpieczeństwa zrealizowanego procesu transportowego w ustalonym przedziale czasu Δt.


Journal of Konbin | 2010

Identification of Undesirable Events in the Municipal Transport System

Maciej Woropay; Piotr Bojar; Klaudiusz Migawa

Identification of Undesirable Events in the Municipal Transport System Road transport systems are socio-technical systems of the type Human - Technical object- Environment . In these systems hazards can be caused by: the human H, the technical object TO, and influence of the environment on the technical object and people who are present in the system and its environment. The authors of the paper make an attempt to evaluate the level of threats resulting from intended or not intended actions of people situated in this environment. Identyfikacja Zdarzeń Niepożądanych W Systemie Transportu Miejskiego Systemy transportu drogowego są systemami socjotechnicznymi typu Człowiek - Obiekt Techniczny - Otoczenie . W systemach tych zagrożenia mogą być stwarzane przez: człowieka C, obiekt techniczny OT oraz przez oddziaływanie otoczenia O na obiekt techniczny i ludzi znajdujących się w systemie oraz w jego otoczeniu. W pracy podjęto próbę oceny poziomu zagrożeń wynikających z zamierzonych lub niezamierzonych działań ludzi usytuowanych systemach transportu drogowego oraz ich otoczeniu.


Journal of Konbin | 2008

Proposal of a Method to Evaluate Safety of the Road Transport Systems Operation

Maciej Woropay; Piotr Bojar; Grzegorz Hoppe

Proposal of a Method to Evaluate Safety of the Road Transport Systems Operation The transport system are sociotechnical systems in which the direct realization of the tasks is dealt with by an executive subsystem consisting of the elementary subsystems of a human - a technical object (an operator - a means of transport) type realizing the tasks within the system environment. In respect of a human located within a transport system the most significant criterion in the evaluation of the transports being realized is their safety. Due to the complexity of the systems being analysed in the paper, it has been attempted to evaluate the influence of the forcing factors on the safety of this system operation. Propozycja Metody Oceny Bezpieczeństwa Działania Systemów Transportu Drogowego Systemy transportowe są systemami socjotechnicznymi, w których bezpośrednią realizacją zadań zajmuje się podsystem wykonawczy złożony z podsystemów elementarnych typu człowiek - obiekt techniczny (operator - środek transportu) realizujących zadania w otoczeniu systemu. Ze względu na człowieka umiejscowionego w systemie transportowym najistotniejszym kryterium w ocenie realizowanych przewozów jest ich bezpieczeństwo. Ze względu na złożoność analizowanych systemów w pracy podjęto próbę oceny wpływu oddziaływań czynników wymuszających na bezpieczeństwo działania tego systemu.


international conference on applied mathematics | 2010

Influence of human factor on transport system safety

Piotr Bojar; Łukasz Muślewski; Maciej Woropay; Janusz Szpytko

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Maciej Woropay

University of Technology and Life Sciences in Bydgoszcz

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Klaudiusz Migawa

University of Science and Technology

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Łukasz Muślewski

University of Science and Technology

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Janusz Szpytko

AGH University of Science and Technology

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Maciej Woropay

University of Technology and Life Sciences in Bydgoszcz

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Bogdan Landowski

University of Technology and Life Sciences in Bydgoszcz

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Leszek Knopik

University of Technology and Life Sciences in Bydgoszcz

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Michał Lewalski

University of Science and Technology

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