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Electric automobil - wishes and reality
Duchoň, Bedřich; Opava, Jaroslav
2010 - English
The demands on cars energy resources are given by the following items: power, speed, acceleration, operation range. All these factors are under balance: future wishes and contemporary reality.
The proposal is dedicated to the analysis of demands related to the electric automobiles.
As a hopefulness solution of these transport means can be seen for city transport (forwarding, shopping, postal services etc). The technical and economic approaches are discussed, too.
Keywords:
power; energy; operating range; electric drive; application; economics
Available in digital repository of UPCE.
Electric automobil - wishes and reality
The demands on cars energy resources are given by the following items: power, speed, acceleration, operation range. All these factors are under balance: future wishes and contemporary reality. The ...
Transport as a factor of sustainability of national economy
Duchoň, Bedřich
2010 - English
Microeconomic level can study of entrepreneurial subject and his/her decisions. Economic subject
takes location decision and final choice as a function of transport possibilities and availability. Macroeconomic point of view involves structure and level of economic activities in geographical areas, cities, regions and countries, especially as a function of quality, safety and other factors. The proposal is aimed at microeconomics and macroeconomics problem of transport.
Keywords:
economic growth; competition; industry; transport; microeconomics; national economy
Available in digital repository of UPCE.
Transport as a factor of sustainability of national economy
Microeconomic level can study of entrepreneurial subject and his/her decisions. Economic subject takes location decision and final choice as a function of transport possibilities and availability. ...
Economic aspects of purchasing logistics
Hruška, Roman
2010 - English
The article deals with economic aspects of purchasing logistics. Purchasing department
in the company must manage and reduce costs if it is possible. The purchaser can use a number
of methods to reduce administrative costs, purchase prices and inventory carrying costs. From a point of view of economics is the main aim of purchase to reduce costs related to purchasing activities. Purchasing focused on getting the right product or service to the right place at the right time, in the right quantity, in the required condition or quality, and from the right supplier at the right price. The management of purchasing activities can lead to increased profitability.
Keywords:
purchasing; logistics; costs; inventory
Available in digital repository of UPCE.
Economic aspects of purchasing logistics
The article deals with economic aspects of purchasing logistics. Purchasing department in the company must manage and reduce costs if it is possible. The purchaser can use a number of methods to ...
Evaluating and ranking infrastructure manager strategies using the combined AHP/DEA method
Kecman, Pavle; Jovanović, Predrag; Bugarinovic, Mirjana
2010 - English
Restructuring of European Railway companies has resulted in creating new subjects within railway
systems - infrastructure managers (IM) on the one hand and railway operators on the other. Each of these subjects strives for efficient operation within the boundaries dictated by regulatory bodies or government directly. In this paper we examine the efficiency and rank different business strategies of railway infrastructure managers using combined AHP/DEA method. Different strategies include different number of paths allocated (diferent capacity utilization index), different ratio of paths allocated to passenger
and freight trains in case of demand for paths being higher than the capacity of the line and infrastructure access charges based on different principles. Each strategy examined is subjected to constrains such as the maximum capacity of the line and public service obligation considering the obligatory number of passenger trains in the timetable defined by the public authorities. The method applied for evaluating and ranking different strategies is a combined AHP/DEA method. Each strategy of the IM is regarded as a decision making unit (DMU) and as such, in the first stage of the model, paired with each of the remaining DMU’s. The Data Envelopment Analysis (DEA) is run for each pair of units separately. In the second stage, the pair wise evaluation matrix generated in the first stage is utilized to rank scale
the units via the Analytical Hierarchical Process (AHP). The results can be used for evaluation of efficient use of infrastructure capacity and financial efficiency of IM simultaneously.
Keywords:
infrastructure manager; evaluating; ranking; AHP/DEA
Available in digital repository of UPCE.
Evaluating and ranking infrastructure manager strategies using the combined AHP/DEA method
Restructuring of European Railway companies has resulted in creating new subjects within railway systems - infrastructure managers (IM) on the one hand and railway operators on the other. Each of ...
Application of tribodiagnostics in the maintenance of vehicles
Machalíková, Jaroslava; Sejkorová, Marie; Chýlková, Jaromíra; Schmidová, Eva
2010 - English
Tribotechnical diagnostics use lubricants as media that help obtain information about processes and changes in the systems that they lubricate. If tribodiagnostics are applied properly and thoroughly, they result in significant savings in many areas; for example, they contribute to an increase of the lifetime of vehicles as well as other machines and devices, to a decrease of consumption of energy, to limiting the idle time due to failures and subsequent repairs, to a decrease of investment as well as operational costs (especially the machine maintenance and repair costs), to an increase of the safety of operation and to a reduction of negative influences of transport on the environment. They are based on monitoring the course of progressive wear of lubricants as well as mechanical parts.
The paper deals with possibilities of using modern instrumental methods in particular: infrared
spectrometry with Fourier transformation, analytical ferrography with consequential image analysis, scanning electron microscopy, local electron microanalysis and voltametry in the area of vehicle lubricant analysis. The first part of the paper presents the results of a study of the course of wear of engine, gear and hydraulic oils and plastic lubricants used for lubricating the vehicle parts. The second part of the paper deals with the abrasion particles isolated from oil filters in different types of vehicles. The evaluation of their number, size, shape, colour, surface characteristics and other morphological attributes helps obtain information about the part they come from and about the mechanism of their creation. This knowledge can thereafter contribute (especially in connection to the knowledge of the chemical structure of the particles) to an elimination of the hazard of a damage or a
breakdown of the machine. The combination of the methods presented above helps monitor the evaluation of the course of processes related to the wear of particles of vehicles as well as steady mechanisms and obtain its complex evaluation.
Keywords:
tribodiagnostics; transport; vehicles; infrared spectrometry
Available in digital repository of UPCE.
Application of tribodiagnostics in the maintenance of vehicles
Tribotechnical diagnostics use lubricants as media that help obtain information about processes and changes in the systems that they lubricate. If tribodiagnostics are applied properly and thoroughly, ...
The user of rubber materials to reduce noise tramlines
Ožanová, Eva; Řezáč, Miloslav; Hudeček, Leopold
2010 - English
VŠB-TU Ostrava, Faculty of Civil Engineering, in cooperation with the Dopravní podnik Ostrava, a.s., ODS - Ostrava, a.s. a company Intertech Ltd. proposed a new type cover plates with the absorption properties of the surface, allowing ride the vehicles. The panels were laid on the test section of length 50 m in Ostrava tram line Zábřeh using security features. The aim of the training is to acquaint the public with knowledge of the technology proposal for the production and laying of the panels, but also with the results measured on the test area in terms of noise reduction and overall contribution to traffic safety.
Keywords:
cover plates; abstract format; template; abstract structure
Available in digital repository of UPCE.
The user of rubber materials to reduce noise tramlines
VŠB-TU Ostrava, Faculty of Civil Engineering, in cooperation with the Dopravní podnik Ostrava, a.s., ODS - Ostrava, a.s. a company Intertech Ltd. proposed a new type cover plates with the absorption ...
Vehicle scheduling with heterogeneous bus fleet
Palúch, Stanislav; Peško, Štefan
2010 - English
The paper studies vehicle scheduling problem formulated as to minimize the number of vehicles with several types of buses. A general mathematical model is presented using graph coloring and bivalent linear programming formulation. A suboptimal algorithm is designed and the way is proposed how to exploit its result to reduce the corresponding bivalent linear programming model.
Keywords:
vehicle scheduling; heterogeneous bus fleet
Available in digital repository of UPCE.
Vehicle scheduling with heterogeneous bus fleet
The paper studies vehicle scheduling problem formulated as to minimize the number of vehicles with several types of buses. A general mathematical model is presented using graph coloring and bivalent ...
The relationship of economy, transport and social development – presence and history
Říha, Zdeněk
2010 - English
The paper observes the mutual relationships of the economy – i.e. the natural need of people to
barter goods - and the transport and the following impacts of these linkages on the development of society
and area complexes. This is shown partly by the historical contexts of the development of medieval
Prague to the present form along with the analyses of present statistical data concerning particularly the national economy, environment and life quality. The economy with high level of division of labour would not be productive enough without efficient transport systems. However, they require increasing transport capacity and have impact on the environment and power supply. It is a proved fact, that countries with more liberal economy are economically stronger (the relation between the index of economic freedom and the gross domestic product). But the question is, what are the consequences for other human activities and whether in the transportation we can use the so called Kuznets curve, which predicates that the environmental impacts decrease with the increasing wealth.
Keywords:
economy; environment; energy; relation; transportation; history
Available in digital repository of UPCE.
The relationship of economy, transport and social development – presence and history
The paper observes the mutual relationships of the economy – i.e. the natural need of people to barter goods - and the transport and the following impacts of these linkages on the development of ...
Human – machine interface research for traffic effectivity and safety
Schmeidler, Karel
2010 - English
Human factors and cognitive engineering competencies exist in Europe but are scattered.
For addressing this fragmentation of research capacities, HUMANIST gathers the most relevant European
research institutes involved in Road Safety and Transport to contribute to the eSafety initiative
and to improve road safety by promoting human centred design for IVIS and ADAS.
Keywords:
human-machine interface; ITS; traffic safety; IVIS; ADAS
Available in digital repository of UPCE.
Human – machine interface research for traffic effectivity and safety
Human factors and cognitive engineering competencies exist in Europe but are scattered. For addressing this fragmentation of research capacities, HUMANIST gathers the most relevant European research ...
Wheel set run profile renewing method effectiveness estimation
Somov, Dmitrij; Bazaras, Žilvinas; Žukauskaite, Orinta
2010 - English
At all the repair enterprises, despite decreased rim wear-off resistance, after every grinding only
geometry wheel profile parameters are renewed. Exploit wheel rim work edge decrease tendency
is noticed what induces acquiring new wheels. This is related to considerable axle load and train speed increase and also because of wheel work edge repair method imperfection.
Keywords:
wheel rim; wheel rim metal; thermal wheel profile processing; restoration
Available in digital repository of UPCE.
Wheel set run profile renewing method effectiveness estimation
At all the repair enterprises, despite decreased rim wear-off resistance, after every grinding only geometry wheel profile parameters are renewed. Exploit wheel rim work edge decrease tendency is ...
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