- Belgrade, Central Serbia, Serbia
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Transportation is an important factor to the development of economy and competitiveness of business. It influences customer’s satisfaction with a particular company. Aside from its importance as an indispensable service of supply chain,... more
Transportation is an important factor to the development of economy and competitiveness of business. It influences customer’s satisfaction with a particular company. Aside from its importance as an indispensable service of supply chain, transportation represents a substantial cost for the business and makes essential influence to environmental performances. To make transport more efficient and to reduce its costs it is necessary to obtain data about different activities and factors of importance for transport. Having this in mind creation and use of goods flow data base must be a platform to analyze transport activities, give conclusions and recommend and implement changes. There is a need to define limited data set which will reflect significant transport indicators of the current state and realized changes during time. Such data will enable correction measures corresponding to the requests of strategic goals defined on national and international level. Database should be available...
Research Interests:
The problem of human error is one of the most significant factors in accidents on the railway. Outlined within this document are the studies of such incidents, as reported by the workers of the railway such as reaction times, safety... more
The problem of human error is one of the most significant factors in accidents on the railway. Outlined within this document are the studies of such incidents, as reported by the workers of the railway such as reaction times, safety measures which seem to indicate error. Sampled are 65 train operators from Locomotive Section from Ruma, and 208 railway workers, in order to identify risk factors caused by human error using statistical methods. In the study, a simulation was used to calculate reaction times and the number of errors, on the basis of which, the reliability of the operators involved in accidents was assessed. Looking at other accidents, such as road and air, what was studied was the reaction times and the amount of errors caused by participants. What has been shown is that there is a certain delay between the perception and motor reaction times which can greatly affect the traffic safety. In this study, participants have been classified according to reaction times and job performance, and an analysis has been made on the impact of reaction times relative to the number of incidents. This allows for an average number of incidents to be extrapolated based on the reaction times and job performance. To process the collected statistical data and data obtained through computer simulated tests on subjects, methods and models were used, which are based on statistical analysis of the reaction times and job performance of the sample taken in relation to the median values from the sample.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Umnozeno za odbranu. - Univerzitet u Beogradu, Saobracajni fakultet, odbranjeno 08.02.2013. - Bibliografija: listovi 147-151. - Rezime ; Abstract. - - Razvoj i izbor modela zeleznickog regulatornog tela [Elektronski izvor] : magistarski... more
Umnozeno za odbranu. - Univerzitet u Beogradu, Saobracajni fakultet, odbranjeno 08.02.2013. - Bibliografija: listovi 147-151. - Rezime ; Abstract. - - Razvoj i izbor modela zeleznickog regulatornog tela [Elektronski izvor] : magistarski rad. - 1 elektronski opticki disk (CD-ROM) ; 12 cm
Research Interests:
... Utvrđivanje zavisnosti otpora krivine od mase i brzine voza. Tepić Jovan a , Stojić Gordan a , Tanackov Ilija a , Vesković Slavko b. a Univerzitet u Novom Sadu, Fakultet tehničkih nauka b Univerzitet u Beogradu, Saobraćajni fakultet.... more
... Utvrđivanje zavisnosti otpora krivine od mase i brzine voza. Tepić Jovan a , Stojić Gordan a , Tanackov Ilija a , Vesković Slavko b. a Univerzitet u Novom Sadu, Fakultet tehničkih nauka b Univerzitet u Beogradu, Saobraćajni fakultet. Saetak. ...
Research Interests:
Na spor. nasl. str.: Methodology to determine a railway junction optimal design. - Biografski podaci o kandidatu: list 158. - Umnozeno za odbranu. - Univerzitet u Beogradu, Saobracajni fakultet, odbranjeno 14.06.2013. - Bibliografija:... more
Na spor. nasl. str.: Methodology to determine a railway junction optimal design. - Biografski podaci o kandidatu: list 158. - Umnozeno za odbranu. - Univerzitet u Beogradu, Saobracajni fakultet, odbranjeno 14.06.2013. - Bibliografija: listovi 142-145. - Sazetak ; Abstract.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
U radu je detaljno izložena i posebno projektovana baza podataka BAZARANZIRNA koja omogucava celokupno racunarsko pracenje i upravljanje tokovima i utvrđivanje lokacije kola u tehnickim teretnim stanicama i predstavlja najvažniji (glavni)... more
U radu je detaljno izložena i posebno projektovana baza podataka BAZARANZIRNA koja omogucava celokupno racunarsko pracenje i upravljanje tokovima i utvrđivanje lokacije kola u tehnickim teretnim stanicama i predstavlja najvažniji (glavni) deo informacione tehnologije za pracenje i upravljanje teretnim kolima. Time je omoguceno donosenje pravih i pravovremenih odluka koje se odnose na pripreme za rasformiranje i formiranje vozova, nakupljanje kola, formiranje i otpremanje vozova da bi se ubrzao proces prevoza robe.
Research Interests:
Research Interests:
U radu je predložena nova, savremena tehnologija rada u tehnickim teretnim stanicama i razvijeni su modeli za postojece i nove tehnologije njihovog rada. Ti modeli omogucavaju simulaciju odvijanja saobracaja, manevarskog rada, kao i... more
U radu je predložena nova, savremena tehnologija rada u tehnickim teretnim stanicama i razvijeni su modeli za postojece i nove tehnologije njihovog rada. Ti modeli omogucavaju simulaciju odvijanja saobracaja, manevarskog rada, kao i procesa u prethodnim, glavnim i zavrsnim operacijama. Modeli su implementirani na primeru stanice Trubarevo ranžirna. U radu su prikazani rezultati testiranja modela za razlicite tehnologije i obime rada tehnickih teretnih stanica. Utvrđen je uticaj primene odgovarajucih tehnologija rada na opterecenost ulazno-izlaznih i kolosecnih kapaciteta, opterecenost osoblja i lokomotiva koje rade u stanicama.
Research Interests: Physics and Humanities
Research Interests:
Umnozeno za odbranu. - Univerzitet u Beogradu, Saobracajni fakultet, odbranjeno 20.06.2003. - Bibliografija: listovi 140-142. - Abstrakt ; Abstract: Optimization of the Work of Technical Freight Stations with a Special Review to the... more
Umnozeno za odbranu. - Univerzitet u Beogradu, Saobracajni fakultet, odbranjeno 20.06.2003. - Bibliografija: listovi 140-142. - Abstrakt ; Abstract: Optimization of the Work of Technical Freight Stations with a Special Review to the Introduction of New Technologies and Modulation of Technological Processes ; L'abstrait: Optimisation du travail des stations techniques de chargement et l'importance d'introduire des nouvelles technologies et formation des modeles du processus technologique.
Research Interests:
Research Interests:
–The paper presents a methodology for predicting the number of passengers on a line that is being modernized by increasing the existing speed to 160 km / h. The forecast was made for two scenarios: without project and with project. The... more
–The paper presents a methodology for predicting the number of passengers on a line that is being modernized by increasing the existing speed to 160 km / h. The forecast was made for two scenarios: without project and with project. The process is complex and involves the application of correlation methods, growth rates, surveys, and heuristic forecasting models. Keywords –forecast, railway, heuristics, surveys.
Research Interests:
The capital work "Logistics Systems" [1] synthesized all human activities and demonstrated that each was a separate logistic sub-system. Furthermore, the origin of the word "logistics" is based on the view that its... more
The capital work "Logistics Systems" [1] synthesized all human activities and demonstrated that each was a separate logistic sub-system. Furthermore, the origin of the word "logistics" is based on the view that its genesis temporally correlates with the invention of steam engine in the eighteenth century (1764). Thus, the genesis of the concept of logistics is directly related to industrial revolution, although the phenomenon of production and trade dates back to much earlier times. Presently, the prevalent view is that the term logistics was first used by the Swiss General Baron de Jomini (1779 − 1869). There are two versions of the genesis of the word logistics, both of French origin. The first, , is derived from military rank and refers to the organization of the military support troops. The other, refers to a spatial military organization − camping. At the end of the nineteenth century, the term logistics "arrived" to the United States, and their mi...
Research Interests:
Research Interests:
The analysis of operations of the passenger traffic operator in the Republic of Srpska (RS) showed that the volume of passenger transport has, for the last fifteen years, been in constant decline. It is of particular importance that the... more
The analysis of operations of the passenger traffic operator in the Republic of Srpska (RS) showed that the volume of passenger transport has, for the last fifteen years, been in constant decline. It is of particular importance that the operator has, year after year, recorded a negative balance of business. The way out of the current unfavorable situation in the sector of passenger traffic is based on the application of Public Service Obligation (PSO) based on the Regulation 1370/2007. In order to solve the problems, seven realistically possible variants have been identified. This paper defines the criteria for selecting the best variant, as well as a new integrated fuzzy model for the selection of the best variant that will enable the operator to make a profit. To define the weights of criteria in this paper, we have used the fuzzy PIvot Pairwise RElative Criteria Importance Assessment (F-PIPRECIA) method, while for ranking and selection of the best variant, we have used the Fuzzy ...
Research Interests:
The paper deals with the queueing system for customers with Poisson’s input current intensity l and two service modes: in the regular service regime of intensity control m, customers are served with probability p»1 and in the special... more
The paper deals with the queueing system for customers with Poisson’s input current intensity l and two service modes: in the regular service regime of intensity control m, customers are served with probability p»1 and in the special regime of servicing the special customers with intensity x. The special customers access the REQS with complementary probability (1-p)»0. The special customer service is analogous to a rare event. The standard methodology has developed analytical patterns for the stationary of REQS with one service channel and an infinite number of positions in the queue. The analysis of the work of REQS indicates that it is for favorable metering parameters r=l/m>2, queueing system is resistant to collapse when a occurrence occurs. However, the regular time losses of the regular customers in the REQS are extremely high. For this reason, it is the first time that the period of stabilization of the system is promoted which represents the time interval service the completion of the special customers until the REQS. The analytical apparatus of the queueing system has shown excellent adaptability to the heterogeneous demands of services m and special customers with low service intensity x, where m>x. The system can be applied to checkpoint calculations, the traffic cuts due to accidents, incidents to industrial systems, ie, the rare events due to anthropogenic and technical factors in intervals of 10-4 do 10-6. The model is not intended for natural hazards.
Research Interests:
Research Interests:
In free market conditions, if public passenger transport services are commercially unprofitable, there will be no interest for transport companies to perform them. However, directly because of the citizens’ interests, on the one hand, and... more
In free market conditions, if public passenger transport services are commercially unprofitable, there will be no interest for transport companies to perform them. However, directly because of the citizens’ interests, on the one hand, and indirectly because of the economy, passenger public transport services have become of a general public interest. The authorities must prepare appropriate legal fair market conditions, based on which public transport will be subsidized and conducted. In order to achieve that, for the mutual benefit of the public, users and transport companies, it is necessary that the right Public Service Obligation Model (PSO model or in some literature PCS—Public Service Compensation) be defined. Within this study, the optimal approach to assigning a PSC contract to transport companies for performing the PSO in integrated and regular public passenger transport systems is determined. A novel model, presented in this paper, can help national, regional and local auth...
Research Interests:
Research Interests:
Research Interests:
The paper is focused on the analysis of contemporary trends of the marketing research of passenger's satisfaction in transportation, with particular emphasis on rail transport, in order to increase its quality, and therefore increase... more
The paper is focused on the analysis of contemporary trends of the marketing research of passenger's satisfaction in transportation, with particular emphasis on rail transport, in order to increase its quality, and therefore increase the efficiency and effectiveness of the system. For analyzing the quality of services in railway passenger transport GAP analysis and SERVQUAL the method that will be used, and their assistance will be determined by the dimensions of service quality in railway transport.
This manuscript starts with a detailed analysis of the current solution for the queueing system M/Er/1/∞. In the existing solution, Erlang’s service is caused by Poisson’s arrival process of groups, but not individual clients. The service... more
This manuscript starts with a detailed analysis of the current solution for the queueing system M/Er/1/∞. In the existing solution, Erlang’s service is caused by Poisson’s arrival process of groups, but not individual clients. The service of individual clients is still exponentially distributed, contrary to the declaration in Kendall’s notation. From the related theory of the Hidden Markov Model (HMM), for the advancement of queueing theory, the idea of “hidden Markov states” (HMS) was taken. In this paper, the basic principles of application of HMS have first been established. The abstract HMS states have a catalytic role in the standard procedure of solving the non-Markovian queueing systems. The proposed solution based on HMS exceeds the problem of accessing identical client groups in the current solution of the M/Er/r queueing system. A detailed procedure for the new solution of the queueing system M/Er/1/∞ is implemented. Additionally, a new solution to the queueing system M/N/...
Research Interests:
Research Interests:
... Page 8. The Spatial Pheromone Signal for Ant Colony Optimisation 407 3. Stepankova, K., Pastalkova, E., Kalova, E., Kalina, M., Bures, J.: A battery of test quanti-tative examination of idiothetic and allothetic place navigation modes... more
... Page 8. The Spatial Pheromone Signal for Ant Colony Optimisation 407 3. Stepankova, K., Pastalkova, E., Kalova, E., Kalina, M., Bures, J.: A battery of test quanti-tative examination of idiothetic and allothetic place navigation modes in humans. ...
Research Interests:
There are several divisions of countries and regions in the world. Besides geo-political divisions, there also are economic divisions. The most common economic division is the that on developed countries and the poor ones. These divisions... more
There are several divisions of countries and regions in the world. Besides geo-political divisions, there also are economic divisions. The most common economic division is the that on developed countries and the poor ones. These divisions are a consequence of the level of: GDP, GDP per capita, unemployment rate, industrial growth, and so on. The question is how to define a mathematical model based on which the following will be assessed: who is rich and who is poor, or who is economically developed and who is not? How the boundaries of transition from one category to another can be defined? This paper presents a model for evaluating the level of economic development of countries and regions using "fuzzy" logic. The model was tested on a sample of 19 EU member countries and aspirants for membership.
Research Interests:
Carrying out the railway reforms in and out of the EU is conducted by different dynamics causing different levels of national reforms. The different levels of reforms have an influence on the railway market establishment and its... more
Carrying out the railway reforms in and out of the EU is conducted by different dynamics causing different levels of national reforms. The different levels of reforms have an influence on the railway market establishment and its liberalisation. The EU institutions’ tendency is to synchronise the process of railway reforms. The initial point of synchronisation is the railway reform evaluation.
Research Interests:
The European standard on transport logistics and services in public passenger transport EN 13816 is based on a relationship between the perception of users and transport carriers throughout the groups of criteria taken as a basis for... more
The European standard on transport logistics and services in public passenger transport EN 13816 is based on a relationship between the perception of users and transport carriers throughout the groups of criteria taken as a basis for observation in this paper. The constant development and improvement of services in order to achieve sustainability of passenger transport is an imperative on the one hand and a challenge on the other. This is highly evident in persons with disabilities who are faced with many physical and social barriers related to access to rail transport. In this paper, a new model for the selection of criteria for the quality of passenger service in rail transport, from the perspective of persons with disabilities as the main category of passengers, has been created. The survey has covered 168 criteria classified in several groups and the entire territory of Serbia. In order to select the most important criteria, a new model that implies the integration of Full Consi...
Research Interests:
There is not a single country in the world that is so rich that it can remove all level crossings or provide their denivelation in order to absolutely avoid the possibility of accidents at the intersections of railways and road traffic.... more
There is not a single country in the world that is so rich that it can remove all level crossings or provide their denivelation in order to absolutely avoid the possibility of accidents at the intersections of railways and road traffic. In the Republic of Serbia alone, the largest number of accidents occur at passive crossings, which make up three-quarters of the total number of crossings. Therefore, it is necessary to constantly find solutions to the problem of priorities when choosing level crossings where it is necessary to raise the level of security, primarily by analyzing the risk and reliability at all level crossings. This paper presents a model that enables this. The calculation of the maximal risk of a level crossing is achieved under the conditions of generating the maximum entropy in the virtual operating mode. The basis of the model is a heterogeneous queuing system. Maximum entropy is based on the mandatory application of an exponential distribution. The system is Mark...
Research Interests:
In a Dynamic Vehicle Routing Problem (DVRP) new customer orders and changes of existing orders continually arrive and thus disrupt the optimal routing plan. This paper presents a survey of some of the recent hybrid artificial intelligence... more
In a Dynamic Vehicle Routing Problem (DVRP) new customer orders and changes of existing orders continually arrive and thus disrupt the optimal routing plan. This paper presents a survey of some of the recent hybrid artificial intelligence algorithms suitable for efficient optimization and re-optimization of different DVRPs. An artificial ant colony 2-OPT hybrid algorithm, a hybrid neighborhood search algorithm, and a hybrid heuristic algorithm are explained in detail. Particular interest is focused towards local improvement heuristic algorithms, such as 2-OPT algorithm and OR’s algorithm, which are regularly used in hybrid approaches for intra-route and inter-route improvements.
Research Interests:
Research Interests:
Research Interests:
Research Interests:
In a process of people’s moving performed on a daily basis a passenger transport is of vital importance. A growing number of people who are over 65, families with young children and people with disabilities require solving some specific... more
In a process of people’s moving performed on a daily basis a passenger transport is of vital importance. A growing number of people who are over 65, families with young children and people with disabilities require solving some specific problems in terms of accessibility. This number of transport users is connected with both domestic and international traffic and transport. The application of universal design concept enables solving accessibility to all objects and public transport. Its basic principle, designed on solving barriers, can be applied to railway transport and railway stations. This paper deals with the basic principle and the plans related to using universal design as a tool for solving accessibility at railway passenger stations.