Ondrej Stopka

Prof. Dr. Ondrej Stopka

Department of Transport nad Logistics, Institute of Technology and Business, České Budějovice, Jihočeský Kraj, Czech Republic
orcid

Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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10 September 2019 in Sustainability
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Journal Article
Open access
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Tomas SkrucanyTomas Skrucany
Tomas Skrucany
MKMartin Kendra
Martin Kendra
OSOndrej Stopka
Ondrej Stopka
Saša T. MilojevićSaša T. Milojević
Saša T. Milojević
Tomasz FiglusTomasz Figlus
Tomasz Figlus
CCCsaba Csiszár
Csaba Csiszár
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.

27 June 2019 in Sustainability
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Journal Article
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VĽVladimír Ľupták
Vladimír Ľupták
Paweł DroździelPaweł Droździel
Paweł Droździel
OSOndrej Stopka
Ondrej Stopka
MSMária Stopková
Mária Stopková
IRIwona Rybicka
Iwona Rybicka
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.

15 August 2022 in Tehnicki vjesnik - Technical Gazette
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SMSaša Milojević
Saša Milojević
SSSlobodan Savić
Slobodan Savić
DMDejan Marić
Dejan Marić
OSOndrej Stopka
Ondrej Stopka
BKBožidar Krstić
Božidar Krstić
Blaza StojanovićBlaza Stojanović
Blaza Stojanović
Diesel engines are economical thanks to their combustion process characteristics, which is why they have a high noise emission level as well as exhaust emissions of nitrogen oxide and particulate matters. By continuously changing the value of compres...

4 September 2017 in Sustainability
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Journal Article
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RKRudolf Kampf
Rudolf Kampf
SLSilvia Lorincová
Silvia Lorincová
MHMiloš Hitka
Miloš Hitka
OSOndrej Stopka
Ondrej Stopka
The workforce of an enterprise consists of employees of various ages with different personality types. Members of each generation differ not only in their behaviour, but also in their attitudes and opinions. A manager should identify generational differences. Subsequently, the management style, leadership and employee motivation should be adapted forasmuch as well-motivated employees are able to affect the efficiency of enterprise processes in right way. The objective of the paper is to identify differences in perception of the preferred level of corporate culture in terms of various generations. Preferred level of corporate culture in six areas is evaluated using a questionnaire consisting of 24 questions. Sixty-four European transport enterprises are engaged in the survey. Following the outcomes, we find that all generations of respondents working in the European transport enterprises prefer clan corporate culture in the course of five years. This culture puts emphasis on employees, customers and traditions. Loyalty and teamwork are considered to be the essential tools for business success. Following the statistical verification using the ANOVA test, we can state that the hypothesis regarding the existence of generational differences in the perception of corporate culture was not confirmed.

1 January 2017 in Procedia Engineering
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Journal Article
Open access
BŠBranislav Šarkan
Branislav Šarkan
OSOndrej Stopka
Ondrej Stopka
Jozef GnapJozef Gnap
Jozef Gnap
Jacek CabanJacek Caban
Jacek Caban

11 April 2016 in Transport
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Journal Article
Open access
OSOndrej Stopka
Ondrej Stopka
RKRudolf Kampf
Rudolf Kampf
The main advantages of maritime transport are (1) lowest costs, (2) large-scale carriage capacity, (3) carriage of different goods over long distances and (4) the most acceptable mode of transport in the context of the environment. This mode of transport is considered more profitable and more cost-effective than all other transport modes. Modern maritime ports have become the essential nodal components of freight transport networks. This paper is focused on determining the most suitable layout of space for the loading units warehousing and handling in the maritime port using the particular method. In the paper, four types of layout and five criteria were taken into account. Layout of warehousing and handling space can affect the entire transport process and can have a great effect on the economics of enterprises.