2009, VOLUME 10 #4. "TRANSPORT AND TELECOMMUNICATION". ЖУРНАЛ ИЗДАТЕЛЬСТВА TSI, ISSN 1407-6160, ISSN 1407-6179 | TSI

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2009, VOLUME 10 #4. "TRANSPORT AND TELECOMMUNICATION". ЖУРНАЛ ИЗДАТЕЛЬСТВА TSI, ISSN 1407-6160, ISSN 1407-6179

PRESENT SITUATION OF HEAVY GOODS TRAFFIC IN LITHUANIA 

Ramūnas Palšaitis1, Artūras Petraška2

Vilnius Gediminas Technical University
Plytines 27, Vilnius, LT-10105 Lithuania
E-mails: 1trvadyba@ti.vgtu.lt, 2arturas@transvelas.lt

The article describes the heavy goods transportation situation in Lithuania. The emphasis is placed to determine the reasons which cause the problems of heavy goods transportation. Shippers and the transport companies which are organizing heavy goods transportation confront with the shortage of especial vehicles and handling equipment, high cost of transportation, high charges, imperfect legal base and awkward behaviour and bureaucracy of governmental institutions.

Keywords: heavy goods, transportation, costs, transportation environment

SPATIAL COMPETITION PRESSURE AS A FACTOR OF EUROPEAN AIRPORTS’ EFFICIENCY 

Dmitry Pavlyuk

Transport and Telecommunication Institute
Lomonosova Str. 1, Riga, LV-1019, Latvia
Ph.: +371 29958338.
E-mail: Dmitry.Pavlyuk@tsi.lv

This study deals with estimation of European airports’ efficiency values and their interrelation with a level of competition pressure for passengers among airports. In this paper a new adaptive definition of airport’s catchment area is presented. Using this definition we develop an indicator of a level of competition pressure, based on overlapping of airport’s potential catchment areas. A stochastic frontier model to estimate efficiencies of airports is applied. The method includes the construction of a production frontier for a sample of airports and estimation of individual airports’ efficiency values as distances from this frontier. A classic production approach to airport activities where an airport enterprise uses labour resources (a number of employees) and infrastructure (a number of runways, gates, check-ins and parking spaces) for transportation of passengers is discussed. A re-sampling jack-knife technique to test the reliability of airports’ efficiencies estimates is used as well. A relationship between a level of competition pressure and airports’ operation efficiencies in case of imperfect spatial competition for passengers has been investigated.

Keywords: stochastic frontier, efficiency, airport, spatial competition

USING T.SAATY METHOD IN TRANSPORT SYSTEMS PLANNING 

Viktors Siperkovskis

Transport and Telecommunication Institute
Lomonosova Str.1, LV-1019, Latvia
Ph.: +371 29234603.
E-mail: viktors.siperkovskis@tsi.lv

A transport system of a country meets the needs of individuals and enterprises located in its territory in transportation and related services. On the one hand it depends on the level of the development of state economy; on the other hand the transport system’s development itself influences the GDP of the specific regions and the whole country. Transport system’s development planning requires the systematic approach and the use of the indicators, which take into account its influence on the society’s welfare. The pairwise comparison method introduced by Thomas L. Saaty meets the requirement of the systematic approach. The procedure of the analytic hierarchy process used in this method allows a group of people to co-operate on the particular problem, to modify the individual judgments and as a result to combine the group judgments according to the basic criterion. Two objectives are followed when working on the given subject: the demonstration of the opportunity of analytic hierarchy process’ (AHP) use in estimation of the transport systems’ investment influence on the Latvian society’s welfare and assessing the opportunity of implementation of AHP algorithm using a standard Microsoft Office package and applying it to 5-6 level hierarchies and matrices that have up to 15 columns and lines.

Keywords: transport system, decision support methods, analytic hierarchy process, analytical planning

INVESTIGATION OF MATHEMATICAL MODEL OF COMMUNICATION NETWORK WITH UNSTEADY FLOW OF REQUESTS 

A.N. Tuenbaeva1, A.A. Nazarov2

1Kaliningrad State Technical University
Sovietsky prospect 1, Kaliningrad, 236000, Russia
e-mail: tuenbaeva_aiya@mail.ru

2Tomsk State University
Lenin prospect 36, Tomsk, 634050, Russia
e-mail: aanazarov@sibmail.com

When choosing structures and characteristics of computer networks in practice, frequently priority is given to the classical techniques and decisions. However, a closer research and disclosure of potential opportunities of networks of data transmission, is promoted by carrying out mathematical modeling. In this work, mathematical models of computer networks of casual access in the form of mass service systems with a source of repeated calls and the notification about the conflict are constructed. A modified method of asymptotic analysis to investigate mathematical models of casual access network was developed. The practical value of the work consists in the results of scientific research to promote carrying out a complex analysis, an optimization and a disclosing of potential opportunities of telecommunication systems of data transmission.

Keywords: random access, unsteady flow, asymptotic analysis

ALGORITHM TO FIND THE SHORTEST PATH ON A HIGH-DIMENSIONAL GRAPH AND ITS APPLICATION FOR TIMETABLE INFORMATION SYSTEMS 

Vladimir Vishnevsky, Roman Zhelezov

ZAO Research & Development Company “Information and Networking Technologies” Staroalekseevskaja Str., 5-215, Moscow, 129626, Russia e-mail: vishn@inbox.ru, ironromeo@mail.ru

We present architecture of a developed timetable information system and describe an original algorithm to find an optimal travel route on public transport.

Keywords: timetable information system, public transport, optimal travel route

DECISION-MAKING IN CLOSED SYSTEM ENVIRONMENT ON THE BASE OF RISK DETERMINATION, LIKE A PART OF LOGISTICAL LEADERSHIP 

Vladimirs Dreimanis

Latvian National Defence Academy
Ezermalas Str. 8, Riga, LV-1014, Latvia
Ph.: +371 67076881.
E-mail: Vladimirs.Dreimanis@mil.lv;

One of the most typical representatives of closed systems is the military system. Furthermore, the military decision-making process is based on standard procedures that from the one side make the process more simple and achievable, bet from the other side – dogmatic and too structured, so necessity of changing it to more flexible and based on considerable achievements in logistic, leadership, telematics and computing sciences – became obvious. The historic fact is, that logistic as such is the result and consequence of ancient development of the theory of war or in other words – military science. Thus, looking at development of logistic up to scientific acknowledgment, it is the time to recognize that the modern logistic is not only some transportation and delivering services providing system, which need to be managed, but it is also separate self-regulating management, development, information and analyses system, that can be again obtained like the “Art of manoeuvring of troops” (Theoretist of French military science Jominie, XIX century, CE). The idea is to introduce Logistical Leadership (not equal to Logistical or Logistics management) like an administration system based on logistical science achievements that cross-integrates self-management, self-development, information analysis and decision-making processes and provides the profit of the most qualitative decisions in any applying area.

The main component of any management system is the decision-maker. More explicitly – his/her ability to understand the interaction of all three components of decision-making triangle is situation, resources (available tools), and human’s/decision-maker’s potentials. The hypothesis that the first two elements have no influence from the decision maker’s side before a decision is made and a relative action taken concentrates our attention on the third one – a human. That approach has to be based not only on a creatively thinking individual, but also on scientifically approved methods of situation evaluation and risk analysis that have to be taken in use. Subsequently, we are finding ourselves in front of the task to create and optimise necessary tools and mathematic models that will allow to make correct choice of experts and to conduct qualitative analysis of information and risks, resulting with the most profitable, effective and faultless decisions – the target and the main product of an administration’s system – Logistical Leadership.

Keywords: logistic management, decision-making, standard procedures, risk management

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