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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Quantitative Assessment of Intelligent Transport Systems for Road Freight Transport

Mbiydzenyuy, Gideon January 2013 (has links)
In this thesis, methods for using computer-based models as support tools for assessing Transport Telematic Services (TTSs) are studied. Such assessments provide one way to understand how TTSs can address problems caused by transportation, such as accidents, emissions, and energy consumption. TTSs are services based on telematic systems which are Intelligent Transport Systems (ITS) involving the integrated use of information and communication technologies in transport. The focus is on TTSs that are relevant for road freight transport, even though the suggested methods can easily be adapted for TTSs in other areas. We characterize TTSs, e.g., in terms of their functionalities, and apply computer-based modeling for pre-deployment assessment of various TTSs (from an ex-ante perspective). By analyzing information provided by the suggested computer-based models, it is possible to make an informed decision whether to (or not to) deploy a given TTS. A review of previous studies reveals information about relevant TTSs for freight transport in areas such as driver support, administration, safety, traffic management, parking, and goods handling. A hierarchical clustering algorithm and a k-minimum spanning tree algorithm were employed to analyze synergies of TTSs. Synergies can enable identification of sets of TTSs that can lead to cost savings if deployed on a common platform (cf. Multi-Service Architectures). An analytical model inspired by the net present value concept is used to estimate quantified societal benefits of TTSs. An optimization model is formulated and solved using a branch and bound method to determine an optimal combination of TTSs taking into consideration societal benefits, costs, dependencies, and synergies. The optimization model also addresses possible system architectures for achieving multiple TTSs. Dominance rough set approach is used to assess and compare benefit areas for TTSs specific to truck parking. The benefit areas are suggested with the help of conceptual modeling, which describes functional models of a system in terms of states, transitions among states, and actions performed in states. The main scientific contributions of the thesis are in suggesting new quantitative models, extending and applying existing models in the assessments of TTSs, and obtaining results that can help decision-makers select TTSs for medium-to long-term investments. Researchers can employ and build on the proposed methods when addressing different scenarios (geographic or organizational) involving similar TTSs. By studying a range of TTSs and possible Multi-Service Architecture concepts for such TTSs, the thesis contributes to achieving convergence of TTSs in a Multi-Service Architecture environment that will improve cost efficiency, minimize redundancies, and encourage the establishment of standards in the deployment of TTSs in road freight transport. TTSs implemented in such an environment can contribute to optimizing available capacity, accuracy, speed, and efficiency of road freight transport systems.
12

Environmentálne zohľadnenia v dlhodobej logistickej zmluve / Environmental considerations in long-term transportation contract

Hanusková, Martina January 2010 (has links)
Final thesis focuses on a new trend in logistics -- environmental considerations in supply chain and innovations connected with cargo transportation. Nowadays, due to diminishing trade barriers, goods are transported across longer distances, which results into negative externalities. The main purpose of this thesis is to analyse the impact of transport of finished vehicles on the environment. The questionare was built to find out interest, measures and future visions of automotive companies in reducing the environmental impact which is a consequence of their outbound logistics.
13

Metodologia de avaliação de emissões de dióxido de carbono no transporte intermodal: um estudo de caso da soja de exportação brasileira. / Methodology for evaluation of carbon dioxide emissions in intermodal transpot: a case study of brazilian soybean exports.

Silva, Rachel Jardim Medeiros da 13 August 2015 (has links)
As emissões globais de dióxido de carbono cresceram em mais de 100% desde 1971 (IEA, 2013), sendo que o aumento foi mais acentuado no período entre 2000 e 2010 (IPCC, 2014). O Brasil ocupa o 13º lugar no ranking mundial dos principais países emissores de gases de efeito estufa (IEA, 2012) e, portanto, é indispensável que alternativas de redução das emissões nacionais sejam estudadas, entre elas, a adoção de modos de transporte mais sustentáveis. Apesar do modo ferroviário ser energeticamente mais eficiente que o rodoviário (ICF CONSULTING, 2009), a extensão da malha ferroviária brasileira é reduzida, sendo necessário associar o transporte ferroviário a etapas de coleta e distribuição da carga por rodovia, o que pode significar maiores gastos energéticos. Em vista disso, este trabalho teve por objetivo propor uma metodologia para estimativa da redução de emissões de dióxido de carbono por meio do transporte intermodal em comparação ao exclusivamente rodoviário. O modelo de emissões desenvolvido é versátil para aplicação em múltiplas situações, não restringindo a região brasileira de estudo e a carga ferroviária. Basicamente, é necessário conhecer o percurso utilizado, bem como o consumo de combustível em litros/tku por trecho ferroviário, além do fator de consumo de combustível médio na rodovia. A metodologia foi aplicada especificamente ao transporte de soja brasileira para exportação. O problema foi abordado em escala nacional, sendo que as origens da carga foram detalhadas por município e as distâncias rodoviárias foram calculadas com a ferramenta Google Maps. Para cada município produtor de soja foram estimadas as emissões associadas às duas alternativas de transporte, sendo a visualização dos resultados realizada por meio de heat map, elaborado em função do potencial de economia de emissões (%) de cada município. Com base nesse mapa, foram apontadas as regiões geográficas do país, onde o transporte intermodal apresenta maiores ganhos ambientais. Por fim, os resultados foram confrontados com o mapa de economias obtido por CRAIG et al. (2012) para os Estados Unidos, sendo o impacto da distância ao terminal de embarque e da distância total da rota na economia de emissões analisado. / Global carbon dioxide emissions have more than doubled since 1971 (IEA, 2013), increasing at a higher rate between 2000 and 2010 (IPCC, 2014). Brazil occupies the 13th position in the ranking of the worlds largest greenhouse gases emitters (IEA, 2012) and, therefore, it is essential to consider alternatives regarding emissions reduction at national level, including sustainable transport systems. Although rail is more fuel efficient than truck (ICF CONSULTING, 2009), the Brazilian rail network is concentrated in a few regions, requiring association of the rail transport to pre- and post-haulage by road, that might lead to higher energy consumption. Thus, this research aimed to develop a methodology to estimate the potential reduction of carbon dioxide emissions due to intermodal transportation when compared to trucking. The emissions model is versatile in terms of possible applications, since it is not restricted to a specific Brazilian region or any good type transported. Basically, it is necessary to know the general route, the fuel consumption in liter/tku for each rail stretch and the average fuel consumption factor of the truck. This method was applied specifically to the Brazilian soybean exportations. The approach of the problem was at the national level and the origins of the cargo corresponded to all the soybean producing towns. Furthermore, road distances were calculated using the Google Maps tool. For each town, emissions were estimated considering both transportation alternatives: intermodal and trucking. Then, the results were presented in a heat map, elaborated in function of the potential carbon savings (%) for each town. Based on this map, the regions where the intermodal route means environmental gains were indicated. Finally, the results were compared to the American carbon savings map created by CRAIG et al. (2012), addressing the impact of terminal distance and total distance travelled on emissions savings.
14

Logistika v ČR / Logistics in the Czech Republic

Štemberová, Kateřina January 2009 (has links)
The Master's Thesis analyzes a logistic background of the Czech Republic in the context of the recent economic crisis and its influence on the development of selected indicators of the logistic market. The objective of the Thesis is to evaluate the impact of these aspects on lo-gistic competitiveness of the Czech Republic in Central and Eastern Europe. The Thesis de-scribes the current situation of the European logistic market together with the main future development trends. The recent development on logistics and industrial property market is worked out in detail, including the changes in attractiveness of logistics locations and criteria influencing developers' activities. Subsequently the Thesis analyzes the situation in logistics and transport infrastructure, characterizes the freight transport and presents current options for their further development. The final part of the Thesis introduces options for education in logistics available in the Czech environment.
15

Des femmes conductrices de poids lourds : parcours de vie et rapport au métier d'une portion croissante de la main-d'œuvre dans un métier en mutation / Female lorry drivers

Rodrigues, Anne-Catherine 21 September 2010 (has links)
L'objet de la thèse consiste à interroger un phénomène : la présence croissante de femmes dans le métier de conducteur routier simultanément aux transformations importantes qui le traversent. La description des propriétés sociologiques et des conditions de travail des conductrices a été réalisée à partir de récits de vie, d'observations du travail et de données quantitatives obtenues par voie de questionnaire. Le développement de postes journaliers en même temps que se déployaient des stratégies pour faire venir de nouveaux candidats (appels de la profession en direction des femmes pour répondre à des difficultés de recrutement de personnels roulants), ont semble-t-il trouvé une résonance auprès de certaines femmes. Les unes déjà attirées par ce métier, les autres considérant que cela pouvait présenter quelque avantage. La thèse montre que le métier de conducteur routier peut offrir des potentialités d'ajustement aux temporalités spécifiques des femmes, tout en leur permettant d'expérimenter une activité professionnelle éloignée des caractéristiques des emplois ou fonctions qu'elles occupent le plus souvent dans un contexte où leur infériorité numérique leur confère un statut d'exception. On a pu établir que sur le plan de la stricte réalisation du travail, les hommes et les femmes qui exercent ce métier sont semblables. Pris dans les mêmes contraintes, ils agissent de manière similaire pour atteindre des objectifs de production qu'ils partagent. Sur d'autres plans, les conducteurs des deux sexes se distinguent. Ces différences tiennent principalement à la position particulière des femmes dans ce métier. Minoritaires parmi les hommes dans un métier construit autour de valeurs masculines, elles doivent adopter des comportements spécifiques pour se faire accepter comme des professionnelles à part entière d'une part, pour neutraliser les rapports de séduction et évacuer toute suspicion quand à leurs motivations à évoluer dans ce milieu, d'autre part / The subject of the thesis is to question a phenomenon : women's increasing presence among the lorry drivers simultaneously with the important transformations in the profession. The description of the sociological properties and the working conditions of the female lorry drivers was realized from interviews, observations of the work and quantitative data obtained by questionnaire.The development of daily posts at the same time as strategies towards the women to answer the difficulties of recruitment, seems to have found an echo with some women. Some of them were already attracted by this job, others considered that it could present some advantage.The research shows that the profession of lorry driver can offer potentialities of adjustment to the specific temporality of the women, while allowing them to experiment a professional activity remote from characteristics of jobs or functions which they occupy mostly in a context where their numerical inferiority confers them a status of exception. We were able to establish that from the point of view of the strict realization of the work, men and women who exercise this job are similar. They have the same constraints and they act in a similar way to reach objectives of production which they share. But the drivers of both sexes distinguish themselves. These differences come from the particular position of the women in this job. Members of a minority part among the men in a job built around male values, they have, on one hand, to adopt specific behaviour to be accepted as full professionals, on the other hand, to evacuate any suspicion about their motivations to evolve in this male environment
16

Strategie podniku v silniční nákladní dopravě / Business strategy in the road freight transport

MAXOVÁ, Gabriela January 2012 (has links)
The aim of the thesis is to evaluate the business economics, to assess the current company strategy and to find such a strategy which will result in the overall improvement and maintenance of the position in the market while rendering the given quality of the services not only in a short period of time but also in a long-term one. Another aim was to optimize costs for a longer time horizon.
17

Metodologia de avaliação de emissões de dióxido de carbono no transporte intermodal: um estudo de caso da soja de exportação brasileira. / Methodology for evaluation of carbon dioxide emissions in intermodal transpot: a case study of brazilian soybean exports.

Rachel Jardim Medeiros da Silva 13 August 2015 (has links)
As emissões globais de dióxido de carbono cresceram em mais de 100% desde 1971 (IEA, 2013), sendo que o aumento foi mais acentuado no período entre 2000 e 2010 (IPCC, 2014). O Brasil ocupa o 13º lugar no ranking mundial dos principais países emissores de gases de efeito estufa (IEA, 2012) e, portanto, é indispensável que alternativas de redução das emissões nacionais sejam estudadas, entre elas, a adoção de modos de transporte mais sustentáveis. Apesar do modo ferroviário ser energeticamente mais eficiente que o rodoviário (ICF CONSULTING, 2009), a extensão da malha ferroviária brasileira é reduzida, sendo necessário associar o transporte ferroviário a etapas de coleta e distribuição da carga por rodovia, o que pode significar maiores gastos energéticos. Em vista disso, este trabalho teve por objetivo propor uma metodologia para estimativa da redução de emissões de dióxido de carbono por meio do transporte intermodal em comparação ao exclusivamente rodoviário. O modelo de emissões desenvolvido é versátil para aplicação em múltiplas situações, não restringindo a região brasileira de estudo e a carga ferroviária. Basicamente, é necessário conhecer o percurso utilizado, bem como o consumo de combustível em litros/tku por trecho ferroviário, além do fator de consumo de combustível médio na rodovia. A metodologia foi aplicada especificamente ao transporte de soja brasileira para exportação. O problema foi abordado em escala nacional, sendo que as origens da carga foram detalhadas por município e as distâncias rodoviárias foram calculadas com a ferramenta Google Maps. Para cada município produtor de soja foram estimadas as emissões associadas às duas alternativas de transporte, sendo a visualização dos resultados realizada por meio de heat map, elaborado em função do potencial de economia de emissões (%) de cada município. Com base nesse mapa, foram apontadas as regiões geográficas do país, onde o transporte intermodal apresenta maiores ganhos ambientais. Por fim, os resultados foram confrontados com o mapa de economias obtido por CRAIG et al. (2012) para os Estados Unidos, sendo o impacto da distância ao terminal de embarque e da distância total da rota na economia de emissões analisado. / Global carbon dioxide emissions have more than doubled since 1971 (IEA, 2013), increasing at a higher rate between 2000 and 2010 (IPCC, 2014). Brazil occupies the 13th position in the ranking of the worlds largest greenhouse gases emitters (IEA, 2012) and, therefore, it is essential to consider alternatives regarding emissions reduction at national level, including sustainable transport systems. Although rail is more fuel efficient than truck (ICF CONSULTING, 2009), the Brazilian rail network is concentrated in a few regions, requiring association of the rail transport to pre- and post-haulage by road, that might lead to higher energy consumption. Thus, this research aimed to develop a methodology to estimate the potential reduction of carbon dioxide emissions due to intermodal transportation when compared to trucking. The emissions model is versatile in terms of possible applications, since it is not restricted to a specific Brazilian region or any good type transported. Basically, it is necessary to know the general route, the fuel consumption in liter/tku for each rail stretch and the average fuel consumption factor of the truck. This method was applied specifically to the Brazilian soybean exportations. The approach of the problem was at the national level and the origins of the cargo corresponded to all the soybean producing towns. Furthermore, road distances were calculated using the Google Maps tool. For each town, emissions were estimated considering both transportation alternatives: intermodal and trucking. Then, the results were presented in a heat map, elaborated in function of the potential carbon savings (%) for each town. Based on this map, the regions where the intermodal route means environmental gains were indicated. Finally, the results were compared to the American carbon savings map created by CRAIG et al. (2012), addressing the impact of terminal distance and total distance travelled on emissions savings.
18

Avaliação do desempenho de sistemas de embalagens nas atividades logísticas de carga urbana / Evaluation of performance of systems packaging in logistics activities of urban freight

Nolêtto, Ana Paula Reis, 1972- 11 January 2013 (has links)
Orientador: Orlando Fontes Lima Júnior / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo / Made available in DSpace on 2018-08-23T23:12:18Z (GMT). No. of bitstreams: 1 Noletto_AnaPaulaReis_M.pdf: 6745542 bytes, checksum: 4c74a4fd947964cd5f31038612c35dab (MD5) Previous issue date: 2013 / Resumo: A ocupação maciça das áreas urbanas gera um aumento no número de automóveis e caminhões que transitam nessas áreas, dificultando a circulação e comprometendo a eficiência da distribuição física de bens, criando congestionamentos e desperdício de tempo e dinheiro. A distribuição urbana é hoje um dos principais problemas logísticos ao longo da cadeia de abastecimento. Normalmente, os esforços para aumento da eficiência desta atividade estão voltados para estratégias de transportes e de armazenagem. Pouco se explora neste contexto a embalagem como elemento de racionalização e aumento de eficiência das operações logísticas de coleta e entrega. O objetivo desse trabalho é realizar um estudo exploratório para avaliar o desempenho de sistemas de embalagem sob a ótica da logística. Para essa avaliação foi utilizado o Packaperforma (PPF), metodologia de avaliação do desempenho de embalagens na qual os profissionais envolvidos na cadeia de suprimentos são entrevistados e julgam segundo critérios específicos. Foram estudados três sistemas de embalagens para acondicionamento de molho de tomate com distribuição final ocorrendo em pontos de venda com diferentes portes e localização (dentro ou fora da zona de máxima restrição de circulação). Os resultados obtidos mostraram que não houve diferença de desempenho global entre os sistemas de embalagens nas cadeias de suprimentos analisadas e indicam que, para alguns critérios específicos, pode haver uma correlação de desempenho das embalagens com o roteiro de distribuição e porte do ponto de venda / Abstract: The massive occupation of urban areas has led to increasing number of automobiles and trucks transiting these areas, hampering circulation and reducing the efficiency of physical distribution of goods, creating congestion and a waste of time and money. Presently, urban distribution is major logistical problem along the supply chain. Usually, efforts to increase the efficiency of this activity are focused on transport and storage strategies. In this context, packaging is rarely explored as a promoting element of rationalization and efficiency of the logistics operations of picking up and delivery. The aim of this work is to conduct an exploratory study to assess the performance of packaging systems from a logistics perspective. Packaperforma (PPF) was used for this evaluation. It is a methodology for assessing packaging performance in which professionals involved in the supply chain are interviewed and are asked to judge according to a specific criteria. Three tomato sauce packaging systems were analyzed in which the final distribution occurred at sale points of different size and location (inside or outside the zone of maximum restriction circulation). The results showed no difference in overall performance between packaging systems in supply chains analyzed and indicated that, for some specific criteria, there might be a correlation between the performance of the packaging, the distribution route and point of sale size / Mestrado / Transportes / Mestra em Engenharia Civil
19

Participation for Sustainable Urban Freight Transport Systems : A Case Study of Freight Receivers in the City of Gothenburg

Lindkvist, Hannes January 2017 (has links)
This thesis is a case study research that look into the difficulty in engaging freight receivers in initiatives related to urban freight transport. The aim of the paper is to investigate how participatory processes could be formed for more successful outcomes and how the freight receivers could become more engaged in the processes. By conducting a qualitative research where primarily interviews with freight receivers and other concerned stakeholder were made, it was possible to distinguish differences and similarities in views and attitudes toward participation in freight related initiatives. The interviewed freight receivers were located in two different areas in the central business district in the city of Gothenburg, Sweden. In one area, the freight receivers have been included in discussions with the traffic and public transport authority regarding a newly implemented restriction for heavy freight vehicles, and thus have experience with participatory processes. These results show that the freight receivers appreciate the possibility to be a part of the discussion even though they are sceptic towards their possibility to influence on decisions. In the other area, the authority is planning on potentially implement the same restrictions, but as they have not started this process, no stakeholders have yet been included in discussions. Thus, the expectations and attitude towards participation in such a process could be studied among freight receivers in this area. Results in this area show that medium sized business, based on turnover, are more enthusiastic in participating meanwhile smaller business and businesses that are part of a chain store or a franchise are less interested in participating. By comparing the views and opinions between these groups with the interview with the authorities, results show that freight receivers and the traffic and public transport authority in Gothenburg have similar views on the importance of participatory processes, but they differ in their views on what influence the freight receivers have in these processes. By analysing the results with the theoretic concepts of participation, engagement and communication it was possible to identify issues in the case that must be considered in order to establish more rewarding participatory processes. It is concluded that freight receivers must be involved already in the process of defining the problem with urban freight transport to close the gap between how the freight receivers and the authorities experience the participatory process. This would enable finding solutions that considerall interests and thus have higher chance of long-lasting implementation rather that creating conflicts on power relations. Further it is stated that with the help of a combination of a scalon plan, quality circle and representative participation is possible to create an altruistic value in participating which could increase the will to engage in participatory processes and creating more sustainable urban freight transport systems.
20

Mezinárodní kamionová doprava ve společnosti ICOM transport a.s. / International freight transport in company ICOM transport a.s.

Hausdor, Petr January 2015 (has links)
Abstract: This master thesis focuses on ICOM transport a.s. company, mainly on it´s international freight transport department. Goals of this master thesis are description of dispatcher´s daily work, indentifying problems and finding solutions that would lead to reducing costs or increasing company efficiency.

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