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Detalles de la revista
Formato
Revista
eISSN
1407-6179
Publicado por primera vez
20 Mar 2000
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

Volumen 18 (2017): Edición 1 (March 2017)

Detalles de la revista
Formato
Revista
eISSN
1407-6179
Publicado por primera vez
20 Mar 2000
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

8 Artículos
Acceso abierto

Strategy for Research Development in the University. Case Study of Transport and Telecommunication Institute

Publicado en línea: 25 Feb 2017
Páginas: 1 - 14

Resumen

Abstract

The paper represents Transport and Telecommunication Institute research programme for period of time 2016-2020. Developed research programme should insure sustainable development of TTI as research institution and should raise research capabilities of the organization by planning and further implementation of the collaboration activities with national and international partners. The analyses of main technology development in the area of TTI research activities, framework for development of research programme, the structure of key TTI strategies and main directions of TTI research activities are described in the paper sides.

Palabras clave

  • Research strategy
  • University
  • research activities
  • outputs
Acceso abierto

Development Potentials and Strategic Objectives of Intelligent Transport Systems Improving Road Safety

Publicado en línea: 25 Feb 2017
Páginas: 15 - 24

Resumen

Abstract

Reducing the number of road accident victims is a declared purpose of the European Union. Intelligent Transport Systems (ITS) are able to contribute to this by warning and supporting the drivers, therefore improving road safety. The aim of our research was to analyze the safety aspects of ITS systems, structuring the solutions, analyzing and exploring the opportunities for development. Strategic objectives have been evaluated and relevant processes for achieving them have been summarized. The research efficiently contributes to the utilization of development potentials of ITS systems.

Palabras clave

  • Intelligent Transport System
  • road safety
  • strategy
Acceso abierto

Road Traffic Congestion Management Based on a Search-Allocation Approach

Publicado en línea: 25 Feb 2017
Páginas: 25 - 33

Resumen

Abstract

This paper introduces a new scheme for road traffic management in smart cities, aimed at reducing road traffic congestion. The scheme is based on a combination of searching, updating, and allocation techniques (SUA). An SUA approach is proposed to reduce the processing time for forecasting the conditions of all road sections in real-time, which is typically considerable and complex. It searches for the shortest route based on historical observations, then computes travel time forecasts based on vehicular location in real-time. Using updated information, which includes travel time forecasts and accident forecasts, the vehicle is allocated the appropriate section. The novelty of the SUA scheme lies in its updating of vehicles in every time to reduce traffic congestion. Furthermore, the SUA approach supports autonomy and management by self-regulation, which recommends its use in smart cities that support internet of things (IoT) technologies.

Palabras clave

  • ITS
  • forecast scheme
  • road traffic management
  • location detection
Acceso abierto

Modelling an Interactive Road Signs System, Using Petri Nets

Publicado en línea: 25 Feb 2017
Páginas: 34 - 44

Resumen

Abstract

This paper is a contribution to the problems of road insecurity in Africa. Due to non-respect of road sign and to the lack of signing, roads have become places of all dangers. It becomes imperative to establish an interaction between the authorities and the offending drivers. To reach this goal, we modelled an interactive road-vehicle-signage system, who locally informs the driver on the requirements of traffic signs. This model having interest only in the event of driving by bad weather or deterioration of panels, we are amending by inserting functions aimed to warn and punish the driver in the event of maintenance of an offense. Indeed, when the driver is about to commit a fault, firstly the system issues a warming (visual, audible or mechanical). Then, a message (SMS) is sent to the authorities. We include the concept of floating process engaged by devices other than the signage. We show that, with a few considerations, from the functional point of view, they are identical to the process engaged by the signage. Furthermore, in terms of performance, the model renewed warnings that occurred just before the end panel of prohibitions. It stores messages of offenses occurred without the network, then notifies them when a network is detected. We propose algorithms for incremental design and analysis of the model, whose processes are activated and / or are extinguished, according to the type of sign or tag encountered. We show by simulation and by linear algebra that, the model retains its properties of absence of blocking and boundedness during the evolution of the system, hence its validation.

Palabras clave

  • Petri nets
  • interactive road signs
  • process
  • incremental design and analysis
  • linear algebra
  • floating process
Acceso abierto

Car Ownership Models in Iran: A Review of Methods and Determinants

Publicado en línea: 25 Feb 2017
Páginas: 45 - 59

Resumen

Abstract

The achievement of sustainable transportation and the desire to reduce car ownership are important aspects of urban planning, especially in developing countries. This paper presents an overview of researches and studies conducted on car ownership to find the knowledge gap and neglected modelling methods that should be employed in the further researches in Iran as one of the Middle East countries. It is found that car ownership models have under gone modification and improvement from regression models towards discrete choice models, although more improvement is necessary and underway. Lack of reliable aggregate and disaggregate data regarding public transport, land use, behavioural and socioeconomic variables particularly for small cities is prominent. To fill the gap, more descriptive and analytical researches and more complex modelling methods and variables need be delved.

Palabras clave

  • Urban transportation planning
  • car ownership models
  • The Middle East
  • Iran
Acceso abierto

Evaluation of Stock Management Strategies Reliability at Dependent Demand

Publicado en línea: 25 Feb 2017
Páginas: 60 - 69

Resumen

Abstract

For efficiently increasing the logistic systems, the core specialists’ attention has to be directed to reducing costs and increasing supply chains reliability. A decent attention to costs reduction has already been paid, so it can be stated that in this way there is a significant progress. But the problem of reliability evaluation is still insufficiently explored, particularly, in such an important sphere as inventory management at the dependent demand.

In the article there is a suggested methodical approach that allows calculating the safety stock quantity at the dependent demand in view of supply chains reliability requirements; the variants for different inventory management strategies at the dependent demand are examined; optimal strategy choice algorithm and results of total costs calculation in view of the reliability are given.

Palabras clave

  • supply chains reliability
  • inventory management
  • dependent demand
  • perfect order
Acceso abierto

Efficiency Estimation of Specialized Multifunctional Ships at Optimal Designing

Publicado en línea: 25 Feb 2017
Páginas: 70 - 78

Resumen

Abstract

The effectiveness assessment of specialized ships was discussed. Three groups of criteria such as financially-economic, technical and operational were analyzed. As an integrated criterion, “cost-effectiveness” ratio was proposed to be used. Selection of the optimum design characteristics of specialized ships were offered to carried out by solving the optimization problem. The description of the optimization problem formulation and the method of its solution were presented.

Palabras clave

  • criteria
  • specialized ship
  • optimization
  • effectiveness
Acceso abierto

Using the Min/Max Method for Replenishment of Picking Locations

Publicado en línea: 25 Feb 2017
Páginas: 79 - 87

Resumen

Abstract

The irregularity of removing quantities from a definite picking location in a warehouse very often results in the stock out in the particular picking address. In practice, the Red Card principle is used to determine a critical level for each picking location when it is necessary to start the replenishment of stock in the picking address. The question is how to calculate an adequate critical level. The guidelines in this paper explain in detail the solution of the problem using the Min/Max stock control method and mathematical algorithms adjusted by authors. In order to check the validity of these mathematical algorithms of the Min/Max method, the simulation modelling has been also done and presented.

Palabras clave

  • Min/Max method
  • replenishment of items
  • red card principle
  • picking process
  • picking locations
8 Artículos
Acceso abierto

Strategy for Research Development in the University. Case Study of Transport and Telecommunication Institute

Publicado en línea: 25 Feb 2017
Páginas: 1 - 14

Resumen

Abstract

The paper represents Transport and Telecommunication Institute research programme for period of time 2016-2020. Developed research programme should insure sustainable development of TTI as research institution and should raise research capabilities of the organization by planning and further implementation of the collaboration activities with national and international partners. The analyses of main technology development in the area of TTI research activities, framework for development of research programme, the structure of key TTI strategies and main directions of TTI research activities are described in the paper sides.

Palabras clave

  • Research strategy
  • University
  • research activities
  • outputs
Acceso abierto

Development Potentials and Strategic Objectives of Intelligent Transport Systems Improving Road Safety

Publicado en línea: 25 Feb 2017
Páginas: 15 - 24

Resumen

Abstract

Reducing the number of road accident victims is a declared purpose of the European Union. Intelligent Transport Systems (ITS) are able to contribute to this by warning and supporting the drivers, therefore improving road safety. The aim of our research was to analyze the safety aspects of ITS systems, structuring the solutions, analyzing and exploring the opportunities for development. Strategic objectives have been evaluated and relevant processes for achieving them have been summarized. The research efficiently contributes to the utilization of development potentials of ITS systems.

Palabras clave

  • Intelligent Transport System
  • road safety
  • strategy
Acceso abierto

Road Traffic Congestion Management Based on a Search-Allocation Approach

Publicado en línea: 25 Feb 2017
Páginas: 25 - 33

Resumen

Abstract

This paper introduces a new scheme for road traffic management in smart cities, aimed at reducing road traffic congestion. The scheme is based on a combination of searching, updating, and allocation techniques (SUA). An SUA approach is proposed to reduce the processing time for forecasting the conditions of all road sections in real-time, which is typically considerable and complex. It searches for the shortest route based on historical observations, then computes travel time forecasts based on vehicular location in real-time. Using updated information, which includes travel time forecasts and accident forecasts, the vehicle is allocated the appropriate section. The novelty of the SUA scheme lies in its updating of vehicles in every time to reduce traffic congestion. Furthermore, the SUA approach supports autonomy and management by self-regulation, which recommends its use in smart cities that support internet of things (IoT) technologies.

Palabras clave

  • ITS
  • forecast scheme
  • road traffic management
  • location detection
Acceso abierto

Modelling an Interactive Road Signs System, Using Petri Nets

Publicado en línea: 25 Feb 2017
Páginas: 34 - 44

Resumen

Abstract

This paper is a contribution to the problems of road insecurity in Africa. Due to non-respect of road sign and to the lack of signing, roads have become places of all dangers. It becomes imperative to establish an interaction between the authorities and the offending drivers. To reach this goal, we modelled an interactive road-vehicle-signage system, who locally informs the driver on the requirements of traffic signs. This model having interest only in the event of driving by bad weather or deterioration of panels, we are amending by inserting functions aimed to warn and punish the driver in the event of maintenance of an offense. Indeed, when the driver is about to commit a fault, firstly the system issues a warming (visual, audible or mechanical). Then, a message (SMS) is sent to the authorities. We include the concept of floating process engaged by devices other than the signage. We show that, with a few considerations, from the functional point of view, they are identical to the process engaged by the signage. Furthermore, in terms of performance, the model renewed warnings that occurred just before the end panel of prohibitions. It stores messages of offenses occurred without the network, then notifies them when a network is detected. We propose algorithms for incremental design and analysis of the model, whose processes are activated and / or are extinguished, according to the type of sign or tag encountered. We show by simulation and by linear algebra that, the model retains its properties of absence of blocking and boundedness during the evolution of the system, hence its validation.

Palabras clave

  • Petri nets
  • interactive road signs
  • process
  • incremental design and analysis
  • linear algebra
  • floating process
Acceso abierto

Car Ownership Models in Iran: A Review of Methods and Determinants

Publicado en línea: 25 Feb 2017
Páginas: 45 - 59

Resumen

Abstract

The achievement of sustainable transportation and the desire to reduce car ownership are important aspects of urban planning, especially in developing countries. This paper presents an overview of researches and studies conducted on car ownership to find the knowledge gap and neglected modelling methods that should be employed in the further researches in Iran as one of the Middle East countries. It is found that car ownership models have under gone modification and improvement from regression models towards discrete choice models, although more improvement is necessary and underway. Lack of reliable aggregate and disaggregate data regarding public transport, land use, behavioural and socioeconomic variables particularly for small cities is prominent. To fill the gap, more descriptive and analytical researches and more complex modelling methods and variables need be delved.

Palabras clave

  • Urban transportation planning
  • car ownership models
  • The Middle East
  • Iran
Acceso abierto

Evaluation of Stock Management Strategies Reliability at Dependent Demand

Publicado en línea: 25 Feb 2017
Páginas: 60 - 69

Resumen

Abstract

For efficiently increasing the logistic systems, the core specialists’ attention has to be directed to reducing costs and increasing supply chains reliability. A decent attention to costs reduction has already been paid, so it can be stated that in this way there is a significant progress. But the problem of reliability evaluation is still insufficiently explored, particularly, in such an important sphere as inventory management at the dependent demand.

In the article there is a suggested methodical approach that allows calculating the safety stock quantity at the dependent demand in view of supply chains reliability requirements; the variants for different inventory management strategies at the dependent demand are examined; optimal strategy choice algorithm and results of total costs calculation in view of the reliability are given.

Palabras clave

  • supply chains reliability
  • inventory management
  • dependent demand
  • perfect order
Acceso abierto

Efficiency Estimation of Specialized Multifunctional Ships at Optimal Designing

Publicado en línea: 25 Feb 2017
Páginas: 70 - 78

Resumen

Abstract

The effectiveness assessment of specialized ships was discussed. Three groups of criteria such as financially-economic, technical and operational were analyzed. As an integrated criterion, “cost-effectiveness” ratio was proposed to be used. Selection of the optimum design characteristics of specialized ships were offered to carried out by solving the optimization problem. The description of the optimization problem formulation and the method of its solution were presented.

Palabras clave

  • criteria
  • specialized ship
  • optimization
  • effectiveness
Acceso abierto

Using the Min/Max Method for Replenishment of Picking Locations

Publicado en línea: 25 Feb 2017
Páginas: 79 - 87

Resumen

Abstract

The irregularity of removing quantities from a definite picking location in a warehouse very often results in the stock out in the particular picking address. In practice, the Red Card principle is used to determine a critical level for each picking location when it is necessary to start the replenishment of stock in the picking address. The question is how to calculate an adequate critical level. The guidelines in this paper explain in detail the solution of the problem using the Min/Max stock control method and mathematical algorithms adjusted by authors. In order to check the validity of these mathematical algorithms of the Min/Max method, the simulation modelling has been also done and presented.

Palabras clave

  • Min/Max method
  • replenishment of items
  • red card principle
  • picking process
  • picking locations

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