Univerzitná knižnica - Vedecké odborné časopisy

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Measurement of the braking distance in dependence on the momentary vehicle weight
(University of Zilina, 2013) Šarkan, Branislav; Holeša, Lukáš; Ivánek, Peter
The braking distance is one of the most important features of the braking system of a vehicle during its operation. The distance depends on many factors related to technical part of the vehicle, road surface or the driver. This paper focuses on the examination of the impact of the momentary weight of the vehicle on its braking distance. It aims at explaining the issue through practical tests and drawing conclusions for further research and practical application in expert activities.
Efficient Transport System in Urban Environment
(University of Zilina, 2013) Gogola, Marian
Many cities are currently facing to problems with the functioning of their transport infrastructure resulting mainly from congestions and the increasing trend of individual car usage. The call for solving and proposing the efficient transport systems occurs due the fact of need to improve the mobility condition in the urban environment. Therefore, this paper deals with the topic of efficient transport system with accent to evaluation of single transport modes and their impact on the urban environment. The two parameters are proposed: the Capacity Index (CI) and the Vehicle Emission Pollutant Index (VEPI) that present how efficient the transport systems are in first case in the sense of transport infrastructure capacity, second in the sense of environmental issue.
Optimization of Fuel Costs Using the Information System
(University of Zilina, 2013) Halaj, Dušan
The paper deals with optimizing fuel consumption through the use of information system in road freight transport. The aim is to calculate and compare the costs for an operation with the information system as well as without it.
Increasing the Safety of Railway Crossings
(University of Zilina, 2013) Nedeliaková, Eva; Nedeliak, Ivan; Búda, Martin
This article is focused on improving safety at railway crossings and points of active and passive safety features. Following these general safety rules we can reduce or eliminate the risks that increasingly affect the right of railway crossings. The article describes redundant lock crossing time which unfavorably affects the rail crossing accidents and the solution which eliminates this factor. The paper is supported by the VEGA Agency by the Project 1/0188/13 ”Quality factors of integrated transport system in the effective provision of public transport services in the context of globalisation“ that is solved at the Faculty of Operation and Economics of Transport and Communications, University of Žilina.
The Risk Analysis in Public Passenger Transport
(University of Zilina, 2013) Poliak, Miloš; Semanová, Štefánia; Kilianová, Katarína
The paper deals with the risks related to providing public passenger transport. The risks are divided into two groups: cost and revenue risks. The paper describes possibilities of risk allocation among contracting parties when providing transport services.
The measurement of contact surface of dunnage bag used for cargo securing in different gaps between cargo
(University of Zilina, 2013) Jagelčák, Juraj; Vrábel, Ján; Pauliak, Matej
This article provides comparison between the measured values of dunnage bag restraining forces and calculated values of restraining forces according to the draft version of Guidelines for Packing of Cargo Transport Units (CTU Code) for the dunnage bag of dimensions 60x120 cm and maximum filling pressure 0.2 bar.
SWOT analysis of the Slovak inland waterway transport
(University of Zilina, 2013) Hricová, Romana
The paper deals with SWOT analysis of Slovak rivers. Although Slovak Republic is situated in the Central Europe, waterways are relatively short and not branched. Inland waterway includes commercial, sporting and tourist navigations. Commercial navigation is limited by flow volume and length of floating period. For commercial navigation have Danube, Váh and Bodrog the best conditions. All three navigable rivers do not allow maximum stable immergence use of actual vessels during the whole year. Navigable conditions (curve radiuses, fairway width, navigable depth, flow rate, flowage) are changeable during the year.
Transport and Communications - celé číslo 1/2013
(University of Zilina, 2013)
The Application of Automatic Identification Technologies by the Czech Post
(University of Zilina, 2013) Zeman, Daniel; Juránková, Petra; Švadlenka, Libor
This article deals with the question of practical use of automatic identification technologies in postal sector, with special focus on using barcode technologies and radio frequency identification in Czech Post. After introductory section, which is aimed at description of current situation and analysis of crucial factors of choosing automatic identification technologies, there are subchapters discussing the theoretical base of both technologies, as well as their practical use in postal sector. In the part of practical application of both identification technologies is specified the basic structure of barcodes used by Czech Post and also the description of international project UNEX, which deals with the measurement of the quality aspects of selected postal products and services. Concluding part contains a brief outline of possible radio frequency identification technology application.
Transport and Communications - celé číslo 2/2013
(University of Zilina, 2013)
The analysis of safety on Polish roads between 2000 - 2010
(University of Zilina, 2013) Jaśkiewicz, Marek; Jurecki, Rafał S.
This article provides an assessment of the security situation on Polish roads. Statistical data on road accidents that occurred in different provinces in late 2000 - 2010 were analysed and the attention was drawn to the differences in the number of road accidents recorded between them. The analysis of accident statistics and the effects they had on particular provinces was made. They were presented for Świętokrzyskie province and compared to other provinces.
The Genesis and Metamorphoses of Risk
(University of Zilina, 2013) Klieštik, Tomáš; Birtus, Miloš
Each business activity and also an individual person face risk every day. But what is risk? People have different attitudes to risk. Natural survival instincts make some people use all possible means to avoid injury or loss. These decisions are not decisions but more of inner instincts of survival. If we move from an individual to an organization, standards and rules become more complex and more formal. When activities become more complex, instinctive and institutional patterns of behaviour forming the basis of personal risk management become inadequate and decisions become more complicated. The theory of risk has been a subject dealt with in many available books by domestic and foreign authors and risk management as such has been a subject of detailed research. We can even claim it constitutes an independent part of the theory of economy.
Evaluation of Effectiveness of Regional Airports in Central Europe by Data Envelope Analysis
(University of Zilina, 2013) Stryčeková, Ivana; Tomová, Anna
In the paper we evaluate economic efficiency of 20 regional airports in Central Europe (Bratislava capital airport including) within 2004 – 2010 using input oriented data envelope analysis (DEA) with constant return on scale to identify super efficiency score. The paper results contribute to airport economic benchmarking literature which is still insufficient just for airports of regional nature. Covering 12 economic inputs and outputs parameters our research revealed Bratislava airport as efficient all the period within the sample analyzed which may be subsequently used as a supportive argument when stating development strategy for Bratislava airport.
Possible repair methods of concrete retaining wall
(University of Zilina, 2013) Saliba, Nicolass; Bartuška, Ladislav
This document gives instruction and information about remediation of transport retaining walls. Concrete and reinforced concrete retaining walls in terms of proposal and workmanship in comparison with many other structures can be considered less demanding. Unfortunately, this fact does not apply every time and we have to solve compromise proposals for remediation. Calculation of load would also not be problematic even for a less ambitious structural engineer. Also, design principles, and most simple form should not bother anyone. The ways of remediation described in this article can be applied to other concrete structures, whether they are retaining walls and noise barriers along roads or railways.
Non Directional Beacons Checking
(University of Zilina, 2014) Pitor, Ján; Škultéty, Filip; Götz, Karol
This paper aims to familiarize experts from other fields with issues of flight check of Non Directional Beacon (NDB) and its assessment. The AT-940 Automatic Flight Inspection System and the aircraft PIPER SENECA are described followed by flight check specifications and procedures. Evaluated were the coverage of NDB Z, NDB ZLA located at Žilina airport and Standard Instrument Approach Procedure for runway 06. The results of evaluation are in paragraph 4. The paper is based on project “Centre of excellence for Air Transport” focused on the impact of air transport on environment photogrammetry, surveillance of electromagnetic compatibility of radio navigation aids and radio communication equipment.
Effect of Injection Advance Angle on Auto-Ignition Delay and Response of Ad3.152 Ur Engine
(University of Zilina, 2014) Ambrozik, Andrzej; Ambrozik, Tomasz; Kurczyński, Dariusz; Łagowski, Piotr
The paper presents the results of experimental investigations into the effect of injection advance angle in the AD3.152UR engine on auto-ignition delay time and engine response coefficient value. In the tests, the engine operated under the full load characteristics and was fuelled by commercial diesel oil. The injection advance angle ranged αww<13, 21> CA deg. The tests aimed to assess the engine ability to adapt to variable load conditions.
Fuel Impact on the Response of AD3.152 UR Engine
(University of Zilina, 2014) Ambrozik, Andrzej; Ambrozik, Tomasz; Kurczyński, Dariusz; Łagowski, Piotr
The paper presents results of investigations into the AD3.152 UR engine running on five fuels: commercial diesel oil DO, rapeseed oil fatty acid methyl esters FAME and their blends B10 (90% DO + 10% FAME), B20 (80% DO + 20% FAME), B30 (70% DO + 30% FAME). During the tests, the engine operated in accordance with the full load characteristics. Those characteristics were used to determine the engine response. The paper provides an assessment of the impact of the type of plant-derived fuel on the engine response.
Transport and Communications - celé číslo 2/2014
(University of Zilina, 2014)
Software Architecture of an Information System for Aviation Broker Center
(University of Zilina, 2014) Krajčovič, Gregor; Horňáková, Silvia
This article describes an information system concept designed to provide large amounts of geospatial data to the public. It addresses specific software design challenges, including wide computational power and storage scalability and unclear definition of stakeholders. It defines functional, security and performance requirements and provides a conceptual system design proposal.
Different Allocation Systems
(University of Zilina, 2014) Letanovská, Mária
Based on the London´s airports example it is obvious that there are differences between 3rd level airports. If the same coordination system would be introduced within various coordinated airports it could lead to various results. The results of analysis of intra-EU route data indicate that larger aircraft have been used at the 3rd level airports and there is no strong evidence of inefficient slot hoarding at these airports, not only before but also after the EC’s recognition of secondary slot trading. In contrast, the analysis of slot trading at Heathrow and Gatwick show that slot trading has taken place more likely within alliance and the chances have been very small for carriers to obtain slots from their actual or potential competitors. For the time being, there may be no need for additional regulatory interventions into secondary slot trading as there is little evidence of inefficient slot hoarding. However, the scarce opportunity of slot trading may lead to less intense competition and then to less efficient use of slots in the long run.