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The main aim of the paper is to present the role of stakeholders in developing reference model of city logistics versus quality of life. Authors discussed different expectations of stakeholders in relation to the city logistics and introduced assumptions for a referential model of city logistics versus quality of life. The study covered selected results of survey conducted among 1600 residents of...
Integration of environmental aspects and taking into account all aspects of sustainable development is one of the new trends in supply chain management (sustainable supply network). In this paper a new method, which is a comprehensive approach to determining the sustainable supply chain from raw material acquisition to the end of life is presented. Applications of the exergy concept in the field of...
The paper presents the methodology of evaluating diversified mass transit systems (MTS-s), operating in different European cities. The evaluation of MTS-s is formulated as a multiple criteria ranking problem and the methodology of Multiple Criteria Decision Making / Aiding (MCDM/A) is applied to solve it. The authors carry out and present all phases of the solution procedure of the multiple criteria...
The main goal of this article is to consider potential problems and impact of the National Stadium located in the centre metropolitan area, on public transport in Warsaw. This choice of location is not utterly consistent with the urban logistics concept, according to which all of traffic generators should be located outside the city center and even better on its outskirts. Public transport problems...
In this paper the structure of the genetic algorithm utilised for solving an integer programming model of lot-sizing and scheduling problem is introduced. Presented genetic algorithm was employed for solving a lot-sizing and scheduling problem formulated as Capacitated Lot Sizing Problem. The method of chromosome encoding, utilised crossover operators and mutation operators employed in this genetic...
This article examines, describes and compares new trends in strategic supply chain management of industrial companies. The increasing globalization and increased uncertainty and risks in the business environment gave birth to new approaches intended to protect the supply chain and to exploit new market opportunities. The basic trends include agile and resilient supply chains. Both of these concepts...
Transportation is just one part of complex international supply chains. However, today, with growing challenges in our European transportation system, we must avoid that transportation becomes the weakest link in the chain, and threatens the efficiency of conception, production, and distribution of our products. This is the reason why people responsible for logistics and supply chains have a keen...
The continuous increase in human activity and development of technology result in a systematic increase in the occurrence of various hazards. One of the major problems in this respect, that may be observed in Poland is a very low level of road safety. This is due to many factors and conditions. Therefore, many activities are carried out aimed at improving safety in the transportation of people. One...
The paper concerns an application of engineering regulation theory concepts to modelling and effective control of logistic systems. Nowadays an achievement of inventory keeping cost vs. benefit trade-off becomes extremely important. This is, however, a complex task with respect to uncertain demand and lead times. These uncertainties result in such problems as high storage costs, varying inventory...
This contribution compares the composite organic brake blocks of type K with cast iron brake block, which is currently used most often. In the article is processed analyze of friction materials used for railway brakes. There are also processed the materials microscopic analysis of individual types of brake blocks using the light microscopy as well as their friction characteristics during braking on...
Numerical simulations of flexible pavement (KR4 category) were carried out in the paper. The special attention was put on modelling of a friction behaviour between structural layers. Three types of models were prepared: no possibility of slide, contact with a friction factor 0,65, contact with a friction factor 0,8. In the models in which the slip was made possible the fatigue strength was one order...
In the work one presented the example of the modelling of the period of the maintenance of elements of the construction steel S235JR of subjects of the atmospheric corrosion and the chemical corrosion. One accepted the idealized linear dependence between the speed of the corrosion and times the exposition. The model was built on the basis data from the literature and results of own corrosive research...
The paper deals with power electronic two-phase propulsion system with IM/SMPMmotors for electric vehicle drives applications. The proposed system consists of two-stage converter comprises: resonant LLC converter with AC output, two-phase matrix converter commutated by HF AC input voltage, and two-phase induction/synchronous motors. Such a system with AC interlink, in comparison with currently used...
Risk assessment and management is actual topic in all fields of life. Railway transport as an important sub-sector of critical infrastructure has very evident particularities. This paper is dealing with application of various methods adopted from other fields (especially chemical industry) and using these methods in railway transport. The aim of the risk assessment methods implementation is increasing...
Railway domain is a safety critical domain, where safety is given utmost importance. The most important part of the railways to carry out operations like safe movement of trains and communications between different entities is “signalling”. The railway signalling is governed by a concept called “interlocking”. Interlocking systems are implemented in different technology, one of them are information...
Transport is a key factor in the development of nowadays society, which in itself is not an end but a means of economic development and a prerequisite to achieving social and regional cohesion. Rapid development of road transport is increasing the risks arising from the specific area of activity. Comprehensive improve safety at the beginning of the 21st century one of the most important tasks of any...
This paper provides information about principles of measurement with device for overhead contact line height and stagger measurement. The device is determined for overhead contact line continuous measurement. The based measured parameters are overhead contact line height and stagger. The other measured parameters are evolved from optional GPS module. The data can be copied to MMC/SD card and they...
The purpose of the paper is to propose a new method for checking the positivity and asymptotic stability of descriptor continuous-time and discrete-time linear systems. The proposed method is based on the elementary operations applied to descriptor linear systems with regular pencils. The descriptor systems with regular pencils are transformed to equivalent standard systems which are used for checking...
This paper investigates the issue of diffusion research focused on diffusion and adoption models at firm level. Diffusion theories are aimed at exploring issues as how, why and with what intensity there are new knowledge, innovations, skills and technological changes spread. The purpose of this article is to analyse diffusion processes and describe inter-firm and intra-firm diffusion and differences...
The aim of the internal environment analysis is to identify the strengths and weaknesses in the internal business environment. The analysis of strengths and weaknesses in the company must be unconditionally prepared to determine what position can be taken by the company, in foreign markets. It includes the identification of the strengths and weaknesses of the company as well as the analysis of the...
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