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At present, companies should definitely be able to adapt to their environment. It entails being able to successfully predict and eliminate flaws and undesirable steps which may result in negative consequences. It can only be executed by careful consideration of three basic enterprise’s components which comprise the following: material resources, financial resources and human resources. An effective corporate coordination and human resource management is a cornerstone of the enterprise’s success while these components are of the same importance to this success. To this end, the aim of this manuscript is to design innovative recruitment procedures when using age management approach for a specific transport company; in particular, its human resource management is taken into consideration. In the initial parts of the manuscript, an analysis of quantitative and qualitative data is performed, wherein introduction into the addressed subject, relevant literature review, as well as description of utilized data and methods within the conducted research are elaborated. Consequently, in a case study section, the Work Ability Index (WAI) method is used to focus on the chosen group of employees in order to profoundly investigate their work abilities. The very examination of employees’ life cycle encompasses multiple age categories and measures a decrease in their work ability level. As for the ensuing (final) parts of the manuscript, a thorough evaluation of results obtained, appropriate discussion and, last but not least, conclusion section are compiled, in which the most imperative findings of the performed investigation are comprehensively summarized. Following the above, the purpose of this study is to compile a novel methodological procedure in terms of using the principles of age management in human resource management; specifically, in an opted transport company, and thus helping towards more effective and sustainable corporate recruitment strategy.
Martina Hlatká; Ondrej Stopka; Ladislav Bartuška; Mária Stopková; Daniela Yordanova; Patrik Gross; Petr Sádlo. Draft Methodology of the Age Management Implementation in Human Resource Management in a Transport Company. Journal of Risk and Financial Management 2021, 14, 183 .
AMA StyleMartina Hlatká, Ondrej Stopka, Ladislav Bartuška, Mária Stopková, Daniela Yordanova, Patrik Gross, Petr Sádlo. Draft Methodology of the Age Management Implementation in Human Resource Management in a Transport Company. Journal of Risk and Financial Management. 2021; 14 (4):183.
Chicago/Turabian StyleMartina Hlatká; Ondrej Stopka; Ladislav Bartuška; Mária Stopková; Daniela Yordanova; Patrik Gross; Petr Sádlo. 2021. "Draft Methodology of the Age Management Implementation in Human Resource Management in a Transport Company." Journal of Risk and Financial Management 14, no. 4: 183.
The presented manuscript discusses a specific research study examining several variants of liquefied natural gas (LNG) carriage from chosen seaports to the port of Bratislava using the Danube waterway, assessing them using chosen multi-criteria analysis techniques. Two ports in Turkey and one port in Georgia are deemed export terminals. A total of twelve variants are compared, whereby the comparison is carried out based on multiple evaluation criteria defined by a panel of experts who laid particular stress on their importance. An economic calculation is performed in the first phase to assess LNG carriage in all the variants. This represents the very foundation for the multi-criteria evaluation, which is conducted using Multi-Criteria Decision Analysis (MCDA) and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). The evaluated variants differ not only in terms of export port location, but also in relation to transport technology. As for the second phase, four distinct technologies in three different scenarios are assessed—specifically, Small-Scale (SS) LNG-C tankers—while two modes of operation (i.e., time-charter, own tanker) and a river-sea LNG tanker with an LNG barge in two versions are considered. The first version considers the use of Marine Gasoil (MGO) fuel, while the second one considers LNG use. The results obtained provide interesting findings, wherein two out of three applied methods prefer the same transport option. Thus, it can be stated that our study presents a unique approach by comparing different scenarios of LNG distribution as a commodity inland along the river Danube, specifically to Central Europe, from a variety of standpoints. The manuscript evaluates carriage using traditional MGO fuels as well as alternative LNG fuels, and also brings a comparison from a technological point of view.
Martin Jurkovič; Tomáš Kalina; Ondrej Stopka; Piotr Gorzelanczyk; Borna Abramović. Economic Calculation and Operations Research in Terms of LNG Carriage by Water Transport: A Case Study of the Port of Bratislava. Sustainability 2021, 13, 3414 .
AMA StyleMartin Jurkovič, Tomáš Kalina, Ondrej Stopka, Piotr Gorzelanczyk, Borna Abramović. Economic Calculation and Operations Research in Terms of LNG Carriage by Water Transport: A Case Study of the Port of Bratislava. Sustainability. 2021; 13 (6):3414.
Chicago/Turabian StyleMartin Jurkovič; Tomáš Kalina; Ondrej Stopka; Piotr Gorzelanczyk; Borna Abramović. 2021. "Economic Calculation and Operations Research in Terms of LNG Carriage by Water Transport: A Case Study of the Port of Bratislava." Sustainability 13, no. 6: 3414.
The manuscript discusses the investigation of vehicle flow in a predesignated junction by an appropriate traffic flow management with an effort to minimize fuel consumption, the production of CO2, an essential greenhouse gas (hereinafter referred to as GHG), and related transport costs. The particular research study was undertaken in a frequented junction in the city of Celje, located in the eastern part of Slovenia. The results obtained summarize data on consumed fuel and produced CO2 amounts depending on the type of vehicle, traffic flow mixture, traffic light signal plan, and actual vehicle velocity. These values were calculated separately for three different conditions of traffic flow management. Amounts of fuel consumed were experimentally investigated in real traffic situations, whereas CO2 production was calculated by applying the actual European standard entitled EN 16258:2012 associated with a guideline for measuring emission values, as well as by examining specific traffic flow parameters. The key objective of the manuscript is to present multiple scenarios towards striving to minimize environmental impacts and improve transport operation’s economic consequences when implementing proper traffic flow management. As for crucial findings, we quantified fuel consumption and CO2 emissions based on real data on the number and type of vehicles crossing the examined intersection and traffic light switching intervals. The results show that most of the CO2 was produced while waiting and in the accelerating phase in front of traffic lights, whereby in the running phase through the intersection, significantly less fuel was used. This study represents a mosaic fragment of research addressing endeavors to reduce CO2 production in urban transport. Following the experiments conducted, we can see a notable contribution towards reducing CO2 production with known and tested interventions in the existing transport infrastructure. A procedure embracing individual research steps may be deemed as an approach methodology dealing with traffic flow management with an aim to decrease the environmental and economic impacts of traffic and transport operation; this is where the novelty of the research lies.
Borut Jereb; Ondrej Stopka; Tomáš Skrúcaný. Methodology for Estimating the Effect of Traffic Flow Management on Fuel Consumption and CO2 Production: A Case Study of Celje, Slovenia. Energies 2021, 14, 1673 .
AMA StyleBorut Jereb, Ondrej Stopka, Tomáš Skrúcaný. Methodology for Estimating the Effect of Traffic Flow Management on Fuel Consumption and CO2 Production: A Case Study of Celje, Slovenia. Energies. 2021; 14 (6):1673.
Chicago/Turabian StyleBorut Jereb; Ondrej Stopka; Tomáš Skrúcaný. 2021. "Methodology for Estimating the Effect of Traffic Flow Management on Fuel Consumption and CO2 Production: A Case Study of Celje, Slovenia." Energies 14, no. 6: 1673.
This paper deals with fatal traffic accidents in the period 2017-2019, caused by drivers who have held driving licenses for less than five years. Specifically, it examines an interconnection between these accidents and the driving schools being completed by these drivers. Furthermore, it analyses whether the perpetrators of traffic accidents with short driving experience are graduates of the same driving schools, and thus, whether the occurrence of serious traffic accidents is directly related to the quality of training in specific driving schools.
Juraj Hudec; Barnislav Šarkan; Jacek Caban; Ondrej Stopka. The impact of driving schools' training on fatal traffic accidents in the Slovak Republic. Scientific Journal of Silesian University of Technology. Series Transport 2021, 110, 45 -57.
AMA StyleJuraj Hudec, Barnislav Šarkan, Jacek Caban, Ondrej Stopka. The impact of driving schools' training on fatal traffic accidents in the Slovak Republic. Scientific Journal of Silesian University of Technology. Series Transport. 2021; 110 ():45-57.
Chicago/Turabian StyleJuraj Hudec; Barnislav Šarkan; Jacek Caban; Ondrej Stopka. 2021. "The impact of driving schools' training on fatal traffic accidents in the Slovak Republic." Scientific Journal of Silesian University of Technology. Series Transport 110, no. : 45-57.
The subject of this article is to model and streamline processes in the area of the transport-supply logistics in a specific enterprise. The topic of the manuscript was implemented in a particular enterprise with the residence in the city of České Budějovice (South Bohemia region). The aim of the article is to step by step analyze the current state of the supply logistics of the specific subject and propose appropriate measures contributing to optimize the entire process using selected techniques of the Operations Research. By applying the methods of multi-criteria decision analysis (such as Weighted Sum Approach and Technique for Order Preference by Similarity to Ideal Solution), the most attractive option is chosen; i.e. the optimal supplier for the implementation of the transport-supply process that will enhance the effectiveness of specific logistics activities in the operation being examined. The conclusion in detail discusses individual contributions in terms of the suggested ways of modeling and improving the current state with respect to supply processes in the selected enterprise.
Ondrej Stopka; Vladimír Ľupták; Mária Stopková; Martin Jurkovič; Karel Jeřábek. Streamlining possibility of transport-supply logistics when using chosen Operations Research techniques. Open Engineering 2020, 11, 195 -204.
AMA StyleOndrej Stopka, Vladimír Ľupták, Mária Stopková, Martin Jurkovič, Karel Jeřábek. Streamlining possibility of transport-supply logistics when using chosen Operations Research techniques. Open Engineering. 2020; 11 (1):195-204.
Chicago/Turabian StyleOndrej Stopka; Vladimír Ľupták; Mária Stopková; Martin Jurkovič; Karel Jeřábek. 2020. "Streamlining possibility of transport-supply logistics when using chosen Operations Research techniques." Open Engineering 11, no. 1: 195-204.
The present research concerns itself with measuring and evaluating fuel consumption of compression ignition engine in passenger cars by a variety of methods and in different operating modes. The main objective is to compare different procedures for the cars’ fuel consumption experimental investigation in the point of view of their accuracy. The measurements were carried out on Citroen Berlingo motor vehicle. The very research is focused on implementing and evaluating the discussed consumption by three different methods, namely calculation from consumed fuel volume measured on fuel station flowmeter (pump stand), recording the data from an on-board computer and obtaining data from a specific application. Given that a certain driving style has a significant impact on fuel consumption, particular examinations were conducted in three operating modes, where the very journeys were made in order to measure the consumption in relation to an economic, a regular and a dynamic driving style. The vehicle being tested was driven on four specified routes that varied in their length, maximum permitted velocity on individual sections and number of intersections, or a citymotorway ratio. To this end, the experimental research resulted in putting toward recommendations and procedures, including appropriate methods, to ensure reliability of fuel consumption measurements with respect to the diverse operating modes of passenger cars.
Tomáš Skrúcaný; Mária Stopková; Ondrej Stopka; Alica Kalašová; Peter Ovčiarik. User’s determination of a proper method for quantifying fuel consumption of a passenger car with compression ignition engine in specific operation conditions. Open Engineering 2020, 11, 151 -160.
AMA StyleTomáš Skrúcaný, Mária Stopková, Ondrej Stopka, Alica Kalašová, Peter Ovčiarik. User’s determination of a proper method for quantifying fuel consumption of a passenger car with compression ignition engine in specific operation conditions. Open Engineering. 2020; 11 (1):151-160.
Chicago/Turabian StyleTomáš Skrúcaný; Mária Stopková; Ondrej Stopka; Alica Kalašová; Peter Ovčiarik. 2020. "User’s determination of a proper method for quantifying fuel consumption of a passenger car with compression ignition engine in specific operation conditions." Open Engineering 11, no. 1: 151-160.
Transport plays a crucial role in economy bringing goods and services to customers and in life of people – transporting passengers to work, school or touristic travel. Unfortunately, the dynamic development of motoring observed in the last 2 decades, contributes to many negative phenomena occurring in road transport. Traffic congestion and high risk of accidents result in disappointment of many drivers and public transport users, causing psychological tension and increasing the traffic accident rate. The article presents a comparative analysis of the state of road traffic safety in Poland, Slovakia and Czech Republic, on the basis of reports and statements of the relevant state bodies. The traffic accident rate is one of key indicators that helps measuring processes of the transport system and its development. In this study we presents the differences on road traffic safety in three countries, also demonstrated traffic accidents caused by technical malfunction of the vehicle and selected aspects of improvement of traffic safety.
Jacek Caban; Pawel Drozdziel; Monika Stoma; Agnieszka Dudziak; Jan Vrabel; Ondrej Stopka. Road Traffic Safety in Poland, Slovakia and Czech Republic – Statistic Analysis. 2020 XII International Science-Technical Conference AUTOMOTIVE SAFETY 2020, 1 -7.
AMA StyleJacek Caban, Pawel Drozdziel, Monika Stoma, Agnieszka Dudziak, Jan Vrabel, Ondrej Stopka. Road Traffic Safety in Poland, Slovakia and Czech Republic – Statistic Analysis. 2020 XII International Science-Technical Conference AUTOMOTIVE SAFETY. 2020; ():1-7.
Chicago/Turabian StyleJacek Caban; Pawel Drozdziel; Monika Stoma; Agnieszka Dudziak; Jan Vrabel; Ondrej Stopka. 2020. "Road Traffic Safety in Poland, Slovakia and Czech Republic – Statistic Analysis." 2020 XII International Science-Technical Conference AUTOMOTIVE SAFETY , no. : 1-7.
The manuscript discusses the current development trends related to electric vehicles and very concept of electromobility in the context of road passenger as well as road freight transport. The introductory section of the manuscript presents the most relevant information and characteristics associated with electromobility, such as breakdown of types of electric vehicles, basic competences of the electromobility system actors, potential options for its application in the field of transport, and the most significant advantages and disadvantages of such vehicles. The second chapter elaborates a brief overview of existing literature sources, such as research studies, electronic scientific papers, conference papers and other publications, regarding the concept of electromobility in terms of road passenger and freight transport. The third and fourth chapter, as the most important manuscript part, describes and processes the data in relation to prediction of electromobility development in both investigated modes of transport, as well as partial results in regard to electromobility and relevant discussion.
Ondrej Stopka; Maria Stopkova; Jan Lizbetin; Jakub Soviar; Jacek Caban. Development Trends of Electric Vehicles in the Context of Road Passenger and Freight Transport. 2020 XII International Science-Technical Conference AUTOMOTIVE SAFETY 2020, 1 -8.
AMA StyleOndrej Stopka, Maria Stopkova, Jan Lizbetin, Jakub Soviar, Jacek Caban. Development Trends of Electric Vehicles in the Context of Road Passenger and Freight Transport. 2020 XII International Science-Technical Conference AUTOMOTIVE SAFETY. 2020; ():1-8.
Chicago/Turabian StyleOndrej Stopka; Maria Stopkova; Jan Lizbetin; Jakub Soviar; Jacek Caban. 2020. "Development Trends of Electric Vehicles in the Context of Road Passenger and Freight Transport." 2020 XII International Science-Technical Conference AUTOMOTIVE SAFETY , no. : 1-8.
In today’s increasingly globalizing world, the demand for the transport of more and more specific kinds of goods is constantly growing. Greater diversity of the objects of transport extends the range of consignees and consignors, which implies the reduction of the number and volume of consignments. Modern enterprises are no longer interested in mass supplies of large quantities of the same material but strive for flexible supplies of smaller quantities of specific materials out of more suppliers. This manuscript deals with the streamlining of specific transport-logistics processes, including a detailed analysis of the existing pick-up system in relation to transport serviceability of the certain territory starting in the city of České Budějovice (Czech Republic) and a determination of more effective variants for supply. The primary objective will be to find and analyze specific options for streamlining the processes being optimized using the selected method of the graph theory, namely the location problem. In the context of optimization, a specific case study is elaborated with the aim to increase the efficiency of the current pickup system, i.e. serviceability of a particular territory.
Ondrej Stopka; Vladimír Ľupták; Pawel Droździel; Iwona Rybicka. Modeling transportation routes of the pick-up system using location problem: a case study. Open Engineering 2020, 10, 784 -792.
AMA StyleOndrej Stopka, Vladimír Ľupták, Pawel Droździel, Iwona Rybicka. Modeling transportation routes of the pick-up system using location problem: a case study. Open Engineering. 2020; 10 (1):784-792.
Chicago/Turabian StyleOndrej Stopka; Vladimír Ľupták; Pawel Droździel; Iwona Rybicka. 2020. "Modeling transportation routes of the pick-up system using location problem: a case study." Open Engineering 10, no. 1: 784-792.
Ondrej Stopka; Mária Stopková; Vladimír Ľupták; Srećko Krile. APPLICATION OF THE CHOSEN MULTI-CRITERIA DECISION-MAKING METHODS TO IDENTIFY THE AUTONOMOUS TRAIN SYSTEM SUPPLIER. Transport Problems 2020, 15, 45 -57.
AMA StyleOndrej Stopka, Mária Stopková, Vladimír Ľupták, Srećko Krile. APPLICATION OF THE CHOSEN MULTI-CRITERIA DECISION-MAKING METHODS TO IDENTIFY THE AUTONOMOUS TRAIN SYSTEM SUPPLIER. Transport Problems. 2020; 15 (2):45-57.
Chicago/Turabian StyleOndrej Stopka; Mária Stopková; Vladimír Ľupták; Srećko Krile. 2020. "APPLICATION OF THE CHOSEN MULTI-CRITERIA DECISION-MAKING METHODS TO IDENTIFY THE AUTONOMOUS TRAIN SYSTEM SUPPLIER." Transport Problems 15, no. 2: 45-57.
The manuscript discusses the overview and specification of the existing Operations Research methods for their implementation in terms of addressing distribution tasks, in particular to optimize delivery routes at a City logistics scale. First of all, a detailed literature review in a given context is elaborated, while the description of potentially relevant techniques to be applied is presented. The manuscript objective is to identify the most appropriate and benefit methods for their implementation to solve vehicle routing problem (hereinafter as VRP) at a City logistics scale and related optimization operations; i.e. to seek the shortest possible routes during the customer’s delivery activities. In this matter, it is important to state that relevant distribution (pick-up and delivery) tasks can be expressed in a form of graphs on specified transport networks, and thereby use the individual techniques of graph theory. The particular transport network, as the basic concept of transport theory, is defined as a finite set of vertices and edges representing the infrastructure of roads of a network. Each network must be coherent, i.e. there must be at least one path for each vertex pair connecting these two vertices. Each network edge as well as vertex is defined by a certain value or set of values, for example, the edge length, the time it takes to pass, the amount of work that needs to be done on the edge, etc.
Ondrej Stopka; Karel Jeřábek; Mária Stopková. Using the Operations Research Methods to Address Distribution Tasks at a City Logistics Scale. Transportation Research Procedia 2020, 44, 348 -355.
AMA StyleOndrej Stopka, Karel Jeřábek, Mária Stopková. Using the Operations Research Methods to Address Distribution Tasks at a City Logistics Scale. Transportation Research Procedia. 2020; 44 ():348-355.
Chicago/Turabian StyleOndrej Stopka; Karel Jeřábek; Mária Stopková. 2020. "Using the Operations Research Methods to Address Distribution Tasks at a City Logistics Scale." Transportation Research Procedia 44, no. : 348-355.
The article deals with a specific research study discussing the possibility to revitalize a specific non-functional intermodal transport terminal. The structure of the manuscript consists of five sections. The first part is focused on the analysis of the subject being investigated in important scientific publications. The second part of the article presents a brief analysis of the current situation concerning intermodal transport in the Czech Republic and emphasizes the need to build an intermodal transport terminal in the South Bohemia region. The third section describes the contemporary state of the Nemanice transshipment station, provides a calculation of the terminal transport potential, which is thereafter used in the next paper section in order to design individual terminal elements. The objective of this study is to propose an approach methodology regarding the terminal connection to railway and road infrastructure, necessary quantification of the transport potential, which subsequently defines the operational need for handling equipment, and other parameters of the terminal fundamental elements. This methodological guideline is based on variant recommendations to equip the terminal with various handling devices, which are then evaluated, applying the exact decision making methods. Such an evaluation is included in the fourth part of the article. Here, the authors try to find out which terminal equipment is the most appropriate in terms of overall terminal efficiency. The last part of the manuscript is devoted to the final discussion of the key findings and conclusion containing an insight into potential future projects or studies to be addressed.
Ján Ližbetin; Ondrej Stopka. Application of Specific Mathematical Methods in the Context of Revitalization of Defunct Intermodal Transport Terminal: A Case Study. Sustainability 2020, 12, 2295 .
AMA StyleJán Ližbetin, Ondrej Stopka. Application of Specific Mathematical Methods in the Context of Revitalization of Defunct Intermodal Transport Terminal: A Case Study. Sustainability. 2020; 12 (6):2295.
Chicago/Turabian StyleJán Ližbetin; Ondrej Stopka. 2020. "Application of Specific Mathematical Methods in the Context of Revitalization of Defunct Intermodal Transport Terminal: A Case Study." Sustainability 12, no. 6: 2295.
Distribution tasks or transportation problems when using Operations Research methods are mostly addressed by vehicle routing problem methods dealing with an issue of supplying to several nodes, wherein the route begins in a point of origin and, after accomplishing deliveries to individual nodes, vehicle returns to an initial point. Each node can be operated only once, the order of nodes is not determined; however, the major objective is to find the shortest route possible. The aim of this research study is to formulate options to model delivery routes executed by automated guided vehicles in an extensive logistics areal by applying the specific mathematical optimization method. After description of several fundamental aspects and attributes related to automated guided vehicles, distribution tasks and vehicle routing problems which are discussed in introductory chapters, the most important parts containing the specification of Greedy algorithm, as a very useful optimization method for the given purpose, as well as the very models of cargo delivery by automated guided vehicles without / with initial distance optimization are presented.
Ondrej Stopka. Modeling the Delivery Routes Carried out by Automated Guided Vehicles when Using the Specific Mathematical Optimization Method. Open Engineering 2020, 10, 166 -174.
AMA StyleOndrej Stopka. Modeling the Delivery Routes Carried out by Automated Guided Vehicles when Using the Specific Mathematical Optimization Method. Open Engineering. 2020; 10 (1):166-174.
Chicago/Turabian StyleOndrej Stopka. 2020. "Modeling the Delivery Routes Carried out by Automated Guided Vehicles when Using the Specific Mathematical Optimization Method." Open Engineering 10, no. 1: 166-174.
DoiFil - Repository of Digital Object Identifiers (DOIs) Issued by Faculty of Philology, University of Belgrade
Tomas Skrucany; Maria Stopkova; Ondrej Stopka; Saša Milojević. Design of a Daily-User Methodology to Detect Fuel Consumption in Cars with Spark Ignition Engine. Applied Engineering Letters : Journal of Engineering and Applied Sciences 2020, 5, 80 -86.
AMA StyleTomas Skrucany, Maria Stopkova, Ondrej Stopka, Saša Milojević. Design of a Daily-User Methodology to Detect Fuel Consumption in Cars with Spark Ignition Engine. Applied Engineering Letters : Journal of Engineering and Applied Sciences. 2020; 5 (3):80-86.
Chicago/Turabian StyleTomas Skrucany; Maria Stopkova; Ondrej Stopka; Saša Milojević. 2020. "Design of a Daily-User Methodology to Detect Fuel Consumption in Cars with Spark Ignition Engine." Applied Engineering Letters : Journal of Engineering and Applied Sciences 5, no. 3: 80-86.
Intelligent conveyors include a large number of sensors and also signalling devices. So-called digital twin presents an advantage that creates a virtual image of a real conveyor. Simulation of the conveyor by simulation language can be an example of a tool of a conveyor virtual image. Simulation allows to test the proposed changes and in the case of functionality, to use the changes in the real operation of pipe conveyor. The paper presents the description of the simulated regression model of conveyor and realized simulation experiments within the regression model of pipe conveyor.
Nikoleta Mikušová; Ondrej Stopka; Mária Stopková; Erika Opettová. Use of simulation by modelling of conveyor belt contact forces. Open Engineering 2019, 9, 709 -715.
AMA StyleNikoleta Mikušová, Ondrej Stopka, Mária Stopková, Erika Opettová. Use of simulation by modelling of conveyor belt contact forces. Open Engineering. 2019; 9 (1):709-715.
Chicago/Turabian StyleNikoleta Mikušová; Ondrej Stopka; Mária Stopková; Erika Opettová. 2019. "Use of simulation by modelling of conveyor belt contact forces." Open Engineering 9, no. 1: 709-715.
The preference and the development of electromobility are included among the priorities of transport policies in many European countries. This article deals with the issue of electric vehicle operation from the point of view of the environmental impact of electric power production, specifically the energy effectiveness of its production by utilizing primary power production sources. Differences in the effectiveness of the conversion of mixed forms of energy into electricity and their share in the process directly affect the final level of greenhouse gases (GHG) production, and thus the ecological footprint of electric vehicle operations. The specification of energy consumption and GHG production is based on the principles of the EN 16 258: 2012 standard, which considers legislative-regulated power plant effectiveness values, statistical values of GHG emissions from electricity production, and real energy consumption values of an electric vehicle fleet. The calculation takes into account the share of primary sources and the efficiency of electricity production and effectiveness of electricity distribution in each of the evaluated countries. The specific research study is performed by comparing measured parameters for individual countries chosen from the Central Europe region. The results of the study show that the quantification of the positive environmental consequences of increasing electromobility varies greatly in different countries, which means full-scale deployment of electromobility does necessarily deliver the sustainability of transport that was expected from it.
Tomáš Skrúcaný; Martin Kendra; Ondrej Stopka; Saša Milojević; Tomasz Figlus; Csaba Csiszár. Impact of the Electric Mobility Implementation on the Greenhouse Gases Production in Central European Countries. Sustainability 2019, 11, 4948 .
AMA StyleTomáš Skrúcaný, Martin Kendra, Ondrej Stopka, Saša Milojević, Tomasz Figlus, Csaba Csiszár. Impact of the Electric Mobility Implementation on the Greenhouse Gases Production in Central European Countries. Sustainability. 2019; 11 (18):4948.
Chicago/Turabian StyleTomáš Skrúcaný; Martin Kendra; Ondrej Stopka; Saša Milojević; Tomasz Figlus; Csaba Csiszár. 2019. "Impact of the Electric Mobility Implementation on the Greenhouse Gases Production in Central European Countries." Sustainability 11, no. 18: 4948.
The effect of logistics has increased steadily in recent years. In regard to the concept of logistics, it is not only referred to as transportation of goods from place A to place B, as many people believe. Logistics covers a wide range of enterprise (supply chain) processes. It is a whole value-creation chain including not only material flows, but also energy, human resources and valuable information. The objective of this research study is to find issues and risks in the current state of supply, inventory management and warehousing process in the given enterprise. In the study, proposals to streamline the current state in terms of inventory management identification system in particular manufacturing enterprise, which is the primary purpose of the submitted paper, are outlined. The specific result is to develop the proposal to increase efficiency and reduce risk regarding the current situation of inventory management identification system applying suitable techniques of the multi-criteria analysis, in particular by the TOPSIS method and by the WSA method.
Ondrej Stopka; Mária Stopková; Vladimír Ľupták. Proposal of the Inventory Management Automatic Identification System in the Manufacturing Enterprise Applying the Multi-criteria Analysis Methods. Open Engineering 2019, 9, 397 -403.
AMA StyleOndrej Stopka, Mária Stopková, Vladimír Ľupták. Proposal of the Inventory Management Automatic Identification System in the Manufacturing Enterprise Applying the Multi-criteria Analysis Methods. Open Engineering. 2019; 9 (1):397-403.
Chicago/Turabian StyleOndrej Stopka; Mária Stopková; Vladimír Ľupták. 2019. "Proposal of the Inventory Management Automatic Identification System in the Manufacturing Enterprise Applying the Multi-criteria Analysis Methods." Open Engineering 9, no. 1: 397-403.
The aim of this article is to modify the parameters and thus the objective function of the deterministic model of inventory theory so that other important aspects, which influence inventory management, can be taken into consideration. These aspects include the nature of inventory consumption, the share of inventories in sales, the capacity of means of transport and, above all, the reliability of suppliers. This goal is achieved by performing sophisticated and specific calculations for the individual parameters in the modified model. The modification of the objective function of the deterministic model has created a new multi-criteria model. The outcome of this model sought to optimize the supply process in a way that minimizes the risks associated with a lack of inventories while maintaining the economic effectiveness thereof. The model effectiveness is examined by comparing the application of the deterministic model and the proposed model with modified objective function. The results of applying these individual models have been produced based on calculations of indicators showing inventory management effectiveness—the speed of inventory turnover and the average number of inventories in storage.
Mária Stopková; Ondrej Stopka; Vladimír Ľupták. Inventory Model Design by Implementing New Parameters into the Deterministic Model Objective Function to Streamline Effectiveness Indicators of the Inventory Management. Sustainability 2019, 11, 4175 .
AMA StyleMária Stopková, Ondrej Stopka, Vladimír Ľupták. Inventory Model Design by Implementing New Parameters into the Deterministic Model Objective Function to Streamline Effectiveness Indicators of the Inventory Management. Sustainability. 2019; 11 (15):4175.
Chicago/Turabian StyleMária Stopková; Ondrej Stopka; Vladimír Ľupták. 2019. "Inventory Model Design by Implementing New Parameters into the Deterministic Model Objective Function to Streamline Effectiveness Indicators of the Inventory Management." Sustainability 11, no. 15: 4175.
The paper is focused on the issue of assessing the quality of transport connectivity on a predesignated transport network in regular public passenger transport at a regional scale. Comprehensively, using the defined key qualitative indicators, it assesses the performance of passenger transport timetables, in both ways of ex ante, as well as ex post. Existing methodologies in a given issue have only dealt with a partial assessment of the transport connectivity quality on specific transport network. However, unlike them, the objective of this manuscript was to propose a new unified methodology to assess the passenger transport timetables in terms of transport connectivity, and subsequently to complexly evaluate the whole predesignated regional transport network from a qualitative point of view. In this paper, the proposed methodology is demonstrated on a particular regional transport network, specifically an existing railway network in the Slovak Republic, whereby the data related to regional passenger transport timetables for a certain day is an input factor. The purpose of this study was to design and verify a draft methodological procedure to assess the quality of transport connectivity on a certain transport network, thus moving towards more effective evaluation of integrated transport systems. Its practical applicability consists in comparison of existing and proposed timetables, which is considered one of the crucial factors in terms of public passenger transport quality.
Vladimír Ľupták; Paweł Droździel; Ondrej Stopka; Mária Stopková; Iwona Rybicka. Approach Methodology for Comprehensive Assessing the Public Passenger Transport Timetable Performances at a Regional Scale. Sustainability 2019, 11, 3532 .
AMA StyleVladimír Ľupták, Paweł Droździel, Ondrej Stopka, Mária Stopková, Iwona Rybicka. Approach Methodology for Comprehensive Assessing the Public Passenger Transport Timetable Performances at a Regional Scale. Sustainability. 2019; 11 (13):3532.
Chicago/Turabian StyleVladimír Ľupták; Paweł Droździel; Ondrej Stopka; Mária Stopková; Iwona Rybicka. 2019. "Approach Methodology for Comprehensive Assessing the Public Passenger Transport Timetable Performances at a Regional Scale." Sustainability 11, no. 13: 3532.
Ondrej Stopka; Vladislav Zitricky; Borna Abramovic; Marin Marinov; Stefano Ricci. Innovative Technologies for Sustainable Passenger Transport. Journal of Advanced Transportation 2019, 2019, 1 -2.
AMA StyleOndrej Stopka, Vladislav Zitricky, Borna Abramovic, Marin Marinov, Stefano Ricci. Innovative Technologies for Sustainable Passenger Transport. Journal of Advanced Transportation. 2019; 2019 ():1-2.
Chicago/Turabian StyleOndrej Stopka; Vladislav Zitricky; Borna Abramovic; Marin Marinov; Stefano Ricci. 2019. "Innovative Technologies for Sustainable Passenger Transport." Journal of Advanced Transportation 2019, no. : 1-2.