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Journal Details
Format
Journal
eISSN
1407-6179
ISSN
1407-6160
First Published
20 Mar 2000
Publication timeframe
4 times per year
Languages
English

Search

Volume 13 (2012): Issue 4 (December 2012)

Journal Details
Format
Journal
eISSN
1407-6179
ISSN
1407-6160
First Published
20 Mar 2000
Publication timeframe
4 times per year
Languages
English

Search

8 Articles
Open Access

Failure Development in a System of Two Connected Networks

Published Online: 04 Dec 2012
Page range: 255 - 260

Abstract

We consider a pair of networks A and B which are subject to failures of their components. In A, edges are subject to failure, and A fails when it disintegrates into several isolated clusters each containing a single terminal. Edges of A fail in random order and their failure moments follow Poisson process. After A has failed, terminal α of A causes a failure (”attacks”) on Rα randomly chosen non terminal nodes of network B. All edges incident to an attacked node are erased. The ”attacks” take negligible time. Network B failure takes place if it loses its terminal connectivity. We study the probability that B will be in failure state at moment t as a function of t and R = ∑ Rα The main formal tools which we use are the D-spectra (signatures) of networks A and B and de Moivre’s combinatorial formula.

Keywords

  • Network terminal connectivity
  • signature
  • D-spectrum
  • Poisson process
  • Monte Carlo
  • random allocation
  • de Moivre formula
Open Access

Warehousing in Finnish and Swedish Companies: State of Operating Environment During Period of 2006–2012

Published Online: 04 Dec 2012
Page range: 261 - 270

Abstract

Despite all the efforts of Just in Time philosophy, companies are still required to run numerous warehouses to accomplish distribution management objectives, and match supply network to this activity. In this research is being reported state of the warehousing practices in the largest Finnish and Swedish companies relying on longitudinal data gained through five different surveys. Research findings show that together these two countries are still on the cost pressure with respect of transportation. Also companies in these two northern countries are still using mostly semi-trailers on their distribution transportation. However, some evidence is on place that containers are taking higher role. Interestingly, most of the warehouses of these two countries report to be located in the countries of the Baltic Sea Region, finding which is rather striking as we have given so much effort on economical integration of this region in the recent decades. Finnish companies seem to hold much larger interest on Central and Eastern European Countries warehousing. Size of warehouses is likely to increase a little bit, and units located in other continents are much smaller.

Keywords

  • warehousing
  • transportation
  • Finland
  • Sweden
  • Geographical Coverage
  • CEEC
Open Access

Lithuania Transport Service Providers’ Position in the Baltic Sea Region Transport Market

Published Online: 04 Dec 2012
Page range: 271 - 274

Abstract

Assessment of Lithuanian road transport service providers’ position in the Baltic Sea region identified, that the Lithuanian road transportation market has the tendency of recovery after the economic and financial crisis. Lithuanian transport companies operating in the BSR and EU market are small - average 7 HGV in the company but they remain competitive in the area of quality service offered. It is defined significant renewal of HGVs fleet - more than thirty percent’s of vehicles have EURO-4 and EURO-5. Big transport companies are extending their service package and in the parallel with the transportation are proposing to the customers’ logistics service package or dedicated services.

Keywords

  • transport
  • service quality
  • security
Open Access

Passenger Car as Complex Experience

Published Online: 04 Dec 2012
Page range: 275 - 283

Abstract

Passenger cars are complex products that consist of millions of parts. Cars have different shapes and colours giving persons different emotional feelings. Therefore the car as a complex product is suitable for marketing specialist for comparing other products through cars. Authors are describing the mathematical background of the theoretical investigation and the practical results of such examination.

Keywords

  • cars
  • emotions
  • experience
Open Access

Transportation of Liquefied Gases: Assessing the Risk of Thermal Damage to Roadside Infrastructure from a Road Tank “Bleve”

Published Online: 04 Dec 2012
Page range: 284 - 293

Abstract

An assessment of risk posed by a road transportation of liquefied gases to roadside property is considered. The attention is focussed on an estimation of the probability of thermal damage to a roadside object. Such damage can be caused by a boiling-liquid expanding-vapour explosion (BLEVE) of a road tank. It is suggested to estimate this probability by a combined application of stochastic simulation and deterministic models used to predict a thermal effect of a BLEVE fireball. A development of a fragility function expressing the probability of ignition of the roadside object is discussed. The fragility function is integrated into the simulation-based procedure of an estimation of the thermal damage probability. The approach proposed in this study is illustrated by an example which considers an assessment of thermal damage to a reservoir built in the vicinity of a road used for transportation of liquefied gases.

Keywords

  • hazmat transportation
  • road tank
  • liquefied gas
  • BLEVE
  • thermal damage
  • risk
Open Access

Does the Theme of a Road Safety Communication Campaign Affect its Success?

Published Online: 04 Dec 2012
Page range: 294 - 302

Abstract

Road safety communication campaigns are considered as an efficient strategy to approach the wide audience and influence road users towards a safe behavior, with main aim to lead to the reduction of the number and the severity of road accidents. When designing the implementation of a campaign, it is important to plan at the same time its evaluation, so that to enable the assessment of its effectiveness. For the achievement of high reliability and the development of “clear” conclusions, the campaign evaluation should be carefully organized, following a feasible scientific design.

Towards this direction, three road safety campaigns, two local campaigns addressing drink driving and seat belt usage, and one national campaign addressing driving fatigue, were implemented and evaluated. Presenting the design components of the three campaigns and the evaluation results, this paper aims at revealing the similarities and differences of the effectiveness of road safety communication campaigns on driving behavior.

Keywords

  • road safety communication campaigns
  • fatigue
  • drink-driving
  • seat belt usage
  • measurement variables
  • experimental design
Open Access

Calculation of Optimal Path for Parallel Car Parking

Published Online: 04 Dec 2012
Page range: 303 - 309

Abstract

The problem of calculation of optimal path for reverse parallel parking is examined. Elementary mathematical model of car movement on plane is described. Optimality criterion and restriction on a possible path for parallel parking are formulated. It is offered a way of choice of a quasi-optimal path for reverse parallel parking. Corresponding numerical calculations and graphic example are presented.

Keywords

  • parking a car
  • mathematical model
  • system of differential equations
  • Cauchy problem
  • conditional optimisation
Open Access

Using Principle of Complementarity when Diagnosing Complex Logistic Activities by Applying Alternative Approach

Published Online: 04 Dec 2012
Page range: 310 - 321

Abstract

The paper considers the problem of obtaining new data in process of diagnostics of a recognized transportation company. Such knowledge should not contradict to existing theories and objective means, but should be aimed instead at improving the diagnoses issued. By investigating the methodological problem by virtue of the principle of complementarity, the goals of making fundamental changes are achieved without disturbing the efficiency of the enterprise activities.

Keywords

  • uniformity
  • integrity
  • value-based management
  • ratio analysis
  • object domain
  • compensatory measures
8 Articles
Open Access

Failure Development in a System of Two Connected Networks

Published Online: 04 Dec 2012
Page range: 255 - 260

Abstract

We consider a pair of networks A and B which are subject to failures of their components. In A, edges are subject to failure, and A fails when it disintegrates into several isolated clusters each containing a single terminal. Edges of A fail in random order and their failure moments follow Poisson process. After A has failed, terminal α of A causes a failure (”attacks”) on Rα randomly chosen non terminal nodes of network B. All edges incident to an attacked node are erased. The ”attacks” take negligible time. Network B failure takes place if it loses its terminal connectivity. We study the probability that B will be in failure state at moment t as a function of t and R = ∑ Rα The main formal tools which we use are the D-spectra (signatures) of networks A and B and de Moivre’s combinatorial formula.

Keywords

  • Network terminal connectivity
  • signature
  • D-spectrum
  • Poisson process
  • Monte Carlo
  • random allocation
  • de Moivre formula
Open Access

Warehousing in Finnish and Swedish Companies: State of Operating Environment During Period of 2006–2012

Published Online: 04 Dec 2012
Page range: 261 - 270

Abstract

Despite all the efforts of Just in Time philosophy, companies are still required to run numerous warehouses to accomplish distribution management objectives, and match supply network to this activity. In this research is being reported state of the warehousing practices in the largest Finnish and Swedish companies relying on longitudinal data gained through five different surveys. Research findings show that together these two countries are still on the cost pressure with respect of transportation. Also companies in these two northern countries are still using mostly semi-trailers on their distribution transportation. However, some evidence is on place that containers are taking higher role. Interestingly, most of the warehouses of these two countries report to be located in the countries of the Baltic Sea Region, finding which is rather striking as we have given so much effort on economical integration of this region in the recent decades. Finnish companies seem to hold much larger interest on Central and Eastern European Countries warehousing. Size of warehouses is likely to increase a little bit, and units located in other continents are much smaller.

Keywords

  • warehousing
  • transportation
  • Finland
  • Sweden
  • Geographical Coverage
  • CEEC
Open Access

Lithuania Transport Service Providers’ Position in the Baltic Sea Region Transport Market

Published Online: 04 Dec 2012
Page range: 271 - 274

Abstract

Assessment of Lithuanian road transport service providers’ position in the Baltic Sea region identified, that the Lithuanian road transportation market has the tendency of recovery after the economic and financial crisis. Lithuanian transport companies operating in the BSR and EU market are small - average 7 HGV in the company but they remain competitive in the area of quality service offered. It is defined significant renewal of HGVs fleet - more than thirty percent’s of vehicles have EURO-4 and EURO-5. Big transport companies are extending their service package and in the parallel with the transportation are proposing to the customers’ logistics service package or dedicated services.

Keywords

  • transport
  • service quality
  • security
Open Access

Passenger Car as Complex Experience

Published Online: 04 Dec 2012
Page range: 275 - 283

Abstract

Passenger cars are complex products that consist of millions of parts. Cars have different shapes and colours giving persons different emotional feelings. Therefore the car as a complex product is suitable for marketing specialist for comparing other products through cars. Authors are describing the mathematical background of the theoretical investigation and the practical results of such examination.

Keywords

  • cars
  • emotions
  • experience
Open Access

Transportation of Liquefied Gases: Assessing the Risk of Thermal Damage to Roadside Infrastructure from a Road Tank “Bleve”

Published Online: 04 Dec 2012
Page range: 284 - 293

Abstract

An assessment of risk posed by a road transportation of liquefied gases to roadside property is considered. The attention is focussed on an estimation of the probability of thermal damage to a roadside object. Such damage can be caused by a boiling-liquid expanding-vapour explosion (BLEVE) of a road tank. It is suggested to estimate this probability by a combined application of stochastic simulation and deterministic models used to predict a thermal effect of a BLEVE fireball. A development of a fragility function expressing the probability of ignition of the roadside object is discussed. The fragility function is integrated into the simulation-based procedure of an estimation of the thermal damage probability. The approach proposed in this study is illustrated by an example which considers an assessment of thermal damage to a reservoir built in the vicinity of a road used for transportation of liquefied gases.

Keywords

  • hazmat transportation
  • road tank
  • liquefied gas
  • BLEVE
  • thermal damage
  • risk
Open Access

Does the Theme of a Road Safety Communication Campaign Affect its Success?

Published Online: 04 Dec 2012
Page range: 294 - 302

Abstract

Road safety communication campaigns are considered as an efficient strategy to approach the wide audience and influence road users towards a safe behavior, with main aim to lead to the reduction of the number and the severity of road accidents. When designing the implementation of a campaign, it is important to plan at the same time its evaluation, so that to enable the assessment of its effectiveness. For the achievement of high reliability and the development of “clear” conclusions, the campaign evaluation should be carefully organized, following a feasible scientific design.

Towards this direction, three road safety campaigns, two local campaigns addressing drink driving and seat belt usage, and one national campaign addressing driving fatigue, were implemented and evaluated. Presenting the design components of the three campaigns and the evaluation results, this paper aims at revealing the similarities and differences of the effectiveness of road safety communication campaigns on driving behavior.

Keywords

  • road safety communication campaigns
  • fatigue
  • drink-driving
  • seat belt usage
  • measurement variables
  • experimental design
Open Access

Calculation of Optimal Path for Parallel Car Parking

Published Online: 04 Dec 2012
Page range: 303 - 309

Abstract

The problem of calculation of optimal path for reverse parallel parking is examined. Elementary mathematical model of car movement on plane is described. Optimality criterion and restriction on a possible path for parallel parking are formulated. It is offered a way of choice of a quasi-optimal path for reverse parallel parking. Corresponding numerical calculations and graphic example are presented.

Keywords

  • parking a car
  • mathematical model
  • system of differential equations
  • Cauchy problem
  • conditional optimisation
Open Access

Using Principle of Complementarity when Diagnosing Complex Logistic Activities by Applying Alternative Approach

Published Online: 04 Dec 2012
Page range: 310 - 321

Abstract

The paper considers the problem of obtaining new data in process of diagnostics of a recognized transportation company. Such knowledge should not contradict to existing theories and objective means, but should be aimed instead at improving the diagnoses issued. By investigating the methodological problem by virtue of the principle of complementarity, the goals of making fundamental changes are achieved without disturbing the efficiency of the enterprise activities.

Keywords

  • uniformity
  • integrity
  • value-based management
  • ratio analysis
  • object domain
  • compensatory measures

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