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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.
21

Proposta de um modelo de avaliação da sustentabilidade ambiental em cadeia de suprimentos: um estudo de caso / Proposal for an environmental sustainability assessment model in the supply chain: a case study

Magacho, Carolina Sales 30 January 2017 (has links)
A cadeia de suprimentos abrange todas as atividades relacionadas com o fluxo e a transformação de produtos desde a matéria-prima na etapa de extração, até chegar ao consumidor final. Envolve, ainda, os fluxos de informações e transformações para cima e para baixo da cadeia de suprimentos. A pesquisa apresenta como objetivo geral avaliar a gestão da cadeia de suprimentos ambiental em uma indústria alimentícia e, como objetivos específicos: desenvolver e aplicar uma metodologia própria para selecionar artigos de relevância científica na área da cadeia de suprimentos sustentável; desenvolver e aplicar uma metodologia específica para conhecer os métodos de avaliação da gestão da cadeia de suprimentos sustentável em periódicos de alto fator de impacto; e, mediante um estudo de caso, desenvolver uma metodologia de pesquisa estruturada, para que se possa avaliar a gestão da cadeia de suprimentos ambiental em uma indústria do ramo alimentício, localizada no estado de Santa Catarina. Com relação à metodologia de pesquisa, foi realizada uma revisão da literatura de forma estruturada em doze passos principais, além do estudo de caso que ocorreu mediante a aplicação de uma metodologia composta por sete constructos, a saber: estágio da gestão ambiental, seleção de fornecedores, colaboração com fornecedores, avaliação de fornecedores, seleção de cientes, colaboração com os clientes e avaliação de clientes. No que se refere aos resultados da pesquisa, o estudo possibilitou testar e aprimorar a metodologia de pesquisa própria, bem como permitiu apresentar um panorama da situação da empresa estudada, onde foi diagnosticado que, em relação ao constructo denominado estágio da gestão ambiental, a empresa apresentou média satisfatória, isso se deve a questões legais e procedimentos internos praticados pela empresa. No entanto, no que se refere aos constructos ‘seleção de fornecedores, colaboração com os fornecedores, avaliação de fornecedores, seleção de clientes, colaboração com os clientes, avaliação de clientes’, a empresa apresentou média insatisfatória. Percebe-se que a empresa realiza ações ambientais, objetivando não sofrer as sanções cabíveis, mas se preocupando de fato, com a sustentabilidade ambiental da cadeia de suprimentos. / The supply chain covers all activities related to the flow and transformation of products from the raw material in the extraction stage, to the final consumer. It also involves downstream and upstream information and transformation flows in the supply chain. The objective of this study is to evaluate the management of the environmental supply chain in the food industry and, as specific objectives: to develop and apply a specific methodology to select articles of scientific relevance in the field of sustainable supply chain; to develop and apply a specific methodology to know the methods of evaluation of sustainable supply chain management in high impact factor journals; and, through a case study, to develop a structured research methodology to evaluate the management of environmental supply chain in the food industry located in the state of Santa Catarina. With regard to the research methodology, a literature review was carried out in a structured form in twelve main steps, in addition to the case study, which occurred through the application of a methodology composed of seven constructs, namely: environmental management stage, supplier selection, supplier collaboration, supplier assessment, customer selection, customer collaboration, and customer assessment. With regard to the research results, the study made it possible to test and improve a specific research methodology, as well as to present an overview of the situation of the company studied, where it was diagnosed that, in relation to the construct denominated environmental management stage, the company presented a satisfactory average, which is due to legal issues and internal procedures it possesses. However, with respect to the constructs selection of suppliers, collaboration with suppliers, supplier evaluation, client selection, collaboration with customers, and customer evaluation, the company presented an unsatisfactory average. One may notice that the company performs environmental actions, aiming not to suffer the applicable sanctions, but actually due to a true concern with the environmental sustainability of the supply chain.
22

Logistické zabezpečení mimořádných událostí jednotkami integrovaného záchranného systému. / The logistic safeguard of extreme situations by the integrated emergency services system.

KULHANOVÁ, Zuzana January 2010 (has links)
Logistical support is an essential part of the activities of all components of the IRS. Currently, the emphasis is on current need to improve and streamline the intervention of the IRS. It can be clearly seen that the success of interventions of IRS components is in their own logistic support. Without the logistic support would not be any possible way to remove the effects of incidents in the required quality and speed. Concerned parts of IRS should be provided with the necessary amenities for a quality performance of professional activities, usually conducted in very difficult circumstances intervention. It can be clearly admission that the whole area of logistics support under the IRS should be in the spotlight of all competent authorities, even in times of relative peace in any case would not be essential logistic support and other components of IRS underestimated. The main object and purpose of this thesis is to map the basic Logistics Support of the Integrated Rescue System of South Bohemia. A partial object is the SWOT analysis, which specifies internal and external factors that are used when creating a project application, its proposal is part of this work, which can be used to purchase special equipment. Mapping is done in two levels. The first level represent standard security technical and substantive resources, which are collected in each financial year of the basic components of the budget. The second level is an advanced security. For the premium, necessary for aims of this work, is considered the acquisition of property by the European Union. Property acquired from the resources of the European Union has a clear positive impact on improving the logistics of such an intervention. The results of this work is the data that was obtained by secondary analysis and building on it in a standardized interview. Data will be used as background material for the processing of sub-project applications.
23

Projektering av en järnvägsanläggning ur ett livscykelperspektiv : En fallstudie om hur infrastrukturförvaltare kan förbättra projektering av stora tekniska system med fokus på livscykelperspektivet / Design a railway infrastructure from a lifecycle perspective : A case study on how infrastructure administrator can improve large technical systems by focusing on life cycle perspective during the planning phase

Kirilmaz, Elias, Quach, Jennifer January 2018 (has links)
Sammanfattning Datum: 2018-05-31 Nivå: Examensarbete i Industriell ekonomi, 30 ECTS Institution: Akademin för Ekonomi, Samhälle och Teknik, EST, Mälardalens Högskola Författare: Elias Kirilmaz & Jennifer Quach Titel: Projektering av en järnvägsanläggning ur ett livscykelperspektiv: En fallstudie om hur infrastrukturförvaltare kan förbättra projektering av stora tekniska system med fokus på livscykelperspektivet Nyckelord: Project, Life Cycle Cost, Railway, Reliability, Availability, Maintainability, Integrated logistic support, ILS, Asset Management, Long-termLarge technical systems, LTS Handledare: Pär Blomkvist & Christian Johansson Norbäck Syfte: Syftet med studien är att undersöka vilka faktorer som påverkar projektering av en järnvägsanläggning ur ett livscykelperspektiv. Målet är att tydliggöra vad Trafikverket behöver ta hänsyn till vid projektering av en järnvägsanläggning Syftet med studien är att undersöka vilka faktorer som påverkar projekteringen av järnvägsanläggningar utifrån ett Life Cycle Managementlångsiktigt hållbarhetsperspektiv perspektiv med fokus en centralpunkt inom på Integrated Logistic Support. Med detta avser studien att ge förslag på för atthur organisationen kunnakan uppnå långsiktiga lönsamhetsmål de krav som ställs på järnvägsanläggningen samt öka förutsägbarheten för livscykelkostnaden. Frågeställningar: Hur kan projektering av järnvägsanläggningar förbättras ur ett långsiktigtlivscykel perspektiv? Vilka faktorer behöver Trafikverket ta hänsyn till vid projekteringsfasen för att säkerställa tillförlitliga och kostnadseffektiva järnvägsanläggningar? Hur kan en arbetsmetodik formas för att främja en kostnadseffektiv järnvägsanläggning? Metod: Följande studie är baserad på en kvalitativ fallstudie av Trafikverket. Metoden är baserad på semistrukturerade intervjuer och dokumentationsmetodik för att erhålla empiriska data. Litteraturstudien och det teoretiska ramverket är baserade på expertgranskade tidskrifter, vetenskapliga artiklar och böcker som täcker studieområdena. Slutsats: Studien har visat att projektering av järnvägsanläggningar ur ett livscykelperspektiv kan förbättras genom att ta fram konkreta underlag för stödja de besluts som ska tas. Beslutsunderlag för järnvägsanläggningen bör baseras på olika analyser för att kunna värdera vilket alternativ som ger den mest kostnadseffektiva anläggningen samtidigt som det återspeglar de efterfrågade målen och kraven. Analyser ska inte enbart baseras på tekniska konstruktion utan även driften samt underhållet behöver beaktas eftersom de har en stor inverkan på utfallet av kapaciteten, prestandan samt kostnaderna över hela anläggningens livscykel. Vidare har studien visat vikten av att ha tillförlitliga system som kan ge information om anläggningen och även all data som krävs för att utföra analyser. / ABSTRACT Date: 2018-05-31 Level: Degree Project in Industrial Engineering and Management, 30 ECTS Institution: School of Business, Society and Engineering, Mälardalen University Authors: Elias Kirilmaz & Jennifer Quach Title: Design a railway infrastructure from a lifecycle perspective: A case study on how infrastructure administrator can improve large technical systems by focusing on life cycle perspective during the planning phase. Keywords: Project, Life Cycle Cost, Railway, Reliability, Availability, Maintainability, Integrated logistic support, ILS, Asset Management, Long-termLarge technical systems, LTS Tutor: Pär Blomkvist & Christian Johansson Norbäck Purpose: The purpose of the study is to investigate which factors affect the longlife cycle-term planning of a railway infrastructure. The aim is to clarify what the Swedish Transport Administration needs to take into account when planning a railway infrastructure in the future in order to meet the requirements and increase the predictability of life cycle costs. Research questions: How can railway infrastructure planning phase be improved based on a life cycle long-term perspective? What factors do the Swedish Transport Administration need to take into account during the planning phase to ensure reliable and cost-effective railway infrastructure? How can a working methodology be designed to promote a cost-effective railway facility? Method: The following study is based on a qualitative case study of Swedish Transport Administration. The literature study and the theoretical framework are based on peer-previewed journals, scientific articles and books that covers the areas of the study. The empirical data collection is based on semi-structured interviews and reports from different administrative authority. Conclusion: This study has shown that planning of railway infrastructure from a life cycle perspective can be improved by concrete evidence to support the decisions to be taken. The decisions basis for the railway infrastructure should be based on various analysis in order to evaluate the most cost-effective option while reflecting the desired goals and requirements. However, analysis should not only be based on the technical design. It should also consider operation and maintenance, since they have a major impact on the outcome of capacity, performance and cost throughout the life cycle of the railway infrastructure. Furthermore, the study has demonstrated the importance of having reliable systems that can provide information about the railway infrastructure and all data required for carrying out analysis.
24

Critérios para análise de limites e potencialidades da sustentabilidade de fontes de energia: um estudo da cadeia produtiva das pequenas centrais hidrelétricas no Brasil

Nowakowski, Geórgia Alana Andréas 11 March 2015 (has links)
Esta pesquisa apresenta como tema de estudo as Pequenas Centrais Hidrelétricas (PCHs). O seu objetivo geral é identificar os principais limites e potencialidades da sustentabilidade da cadeia produtiva de PCHs no Brasil, ao contexto das dimensões ambiental, social, econômica e institucional. O referencial teórico contempla conceitos e questões referentes: a cadeia produtiva; a Teoria do Ator-rede; as fontes de energia renováveis, mais especificamente a hidroeletricidade; e aos fatores determinantes da competitividade. Para a identificação dos gargalos e potencialidades, foi realizado um mapeamento da estrutura da cadeia de produção das PCHs, assim como a descrição do panorama atual das PCHs no país. Em seguida, foram estudadas, de forma mais aprofundada, cinco etapas que compõem a cadeia: recurso natural; geração; transmissão; distribuição; e comercialização. Na sequência, foram utilizados cinco critérios (importância, probabilidade, temporalidade, efeito e abrangência) para classificar os fatores identificados em cada etapa. Por fim, através da multiplicação dos índices numéricos atribuídos aos critérios, foi obtido o Índice de Significância (IS. No que tange à metodologia da pesquisa, ela pode ser classificada como aplicada e exploratória. Os dados empregados são secundários e foi utilizada a técnica de análise qualitativa. Como resultado, foram identificados 20 limites e 17 potencialidades relacionadas com a cadeia produtiva das PCHs no Brasil, sendo que destes 37 itens, 8 foram enquadrados como muito significativos, segundo os critérios estabelecidos para o IS. No que se refere ao resultado principal da pesquisa, verifica-se que, apesar de existirem potencialidades significativas para o desenvolvimento das PCHs na matriz energética nacional (o potencial hidrelétrico das bacias hidrográficas, a sua capacidade de atuar como vetor de desenvolvimento regional, a consolidação dos fabricantes de turbinas e geradores, e o livre acesso), alguns gargalos existentes na sua cadeia de produção devem ser trabalhados, tais como a interferência na migração e reprodução da ictiofauna continental, a desigualdade na distribuição de energia elétrica, e os aspectos legais e técnicos relacionados com o meio ambiente e a comercialização de energia. / This research study has as a theme: Small Hydro Power Plants (SHP). Its overall objective is to identify the main limits and potential sustainabilities of the productive chain of power plants in Brazil to the context of environmental, social, economic and institutional dimensions. The theoretical framework includes concepts that concern: the production chain, the Actor-Network Theory, renewable energy sources (specifically hydroelectricity) and the determinants of competitiveness. For the identification of limits and potential, mapping of the production of SHP chain structure was carried out; as well as the description of the current landscape of the SHP in the country. They were then studied in more depth. The five steps that make up the chain being: natural resource, generation, transmission, distribution and commercialization. Next, five criteria were used: importance, likelihood, timeliness, effect and scope; in order to classify the factors identified in each step. Finally, by multiplying the numerical index assigned to the criteria; the significance index (SI) was obtained, which was used to frame the final significance of the aspects by: less significant, significant and very significant. Regarding research methodology; it can be classified as: exploratory and applied. The data used was secondary and was used as qualitative analysis. As a result, we identified 20 potential limits and 17 related to the production chain of power plants in Brazil, and of these 37 items, 8 were classified as very significant, according to the criteria established for the IS. With regard to the main search result, it appears that, although there are significant potential for the development of SHP in the national energy matrix (hydropower potential of river basins, their ability to act as regional development vector, consolidation of turbines and generators manufacturers, and free access), some hurdles in the production chain must be worked out, such as interference in the migration and reproduction of continental fish fauna, inequality in the distribution of electricity, and the legal and technical aspects related to the environment and the commercialization of energy.
25

Performance Optimisation of Discrete-Event Simulation Software on Multi-Core Computers / Prestandaoptimering av händelsestyrd simuleringsmjukvara på flerkärniga datorer

Kaeslin, Alain E. January 2016 (has links)
SIMLOX is a discrete-event simulation software developed by Systecon AB for analysing logistic support solution scenarios. To cope with ever larger problems, SIMLOX's simulation engine was recently enhanced with a parallel execution mechanism in order to take advantage of multi-core processors. However, this extension did not result in the desired reduction in runtime for all simulation scenarios even though the parallelisation strategy applied had promised linear speedup. Therefore, an in-depth analysis of the limiting scalability bottlenecks became necessary and has been carried out in this project. Through the use of a low-overhead profiler and microarchitecture analysis, the root causes were identified: atomic operations causing a high communication overhead, poor locality leading to translation lookaside buffer thrashing, and hot spots that consume significant amounts of CPU time. Subsequently, appropriate optimisations to overcome the limiting factors were implemented: eliminating the expensive operations, more efficient handling of heap memory through the use of a scalable memory allocator, and data structures that make better use of caches. Experimental evaluation using real world test cases demonstrated a speedup of at least 6.75x on an eight-core processor. Most cases even achieve a speedup of more than 7.2x. The various optimisations implemented further helped to lower run times for sequential execution by 1.5x or more. It can be concluded that achieving nearly linear speedup on a multi-core processor is possible in practice for discrete-event simulation. / SIMLOX är en kommersiell mjukvara utvecklad av Systecon AB, vars huvudsakliga funktion är en händelsestyrd simuleringskärna för analys av underhållslösningar för komplexa tekniska system. För hantering av stora problem så används parallellexekvering för simuleringen, vilket i teorin borde ge en nästan linjär skalning med antal trådar. Prestandaförbättringen som observerats i praktiken var dock ytterst begränsad, varför en ordentlig analys av skalbarheten har gjorts i detta projekt. Genom användandet av ett profileringsverktyg med liten overhead och mikroarkitektur-analys, så kunde orsakerna hittas: atomiska operationer som skapar mycket overhead för kommunikation, dålig lokalitet ger fragmentering vid översättning till fysiska adresser och dåligt utnyttjande av TLB-cachen, och vissa flaskhalsar som kräver mycket CPU-kraft. Därefter implementerades och testade optimeringar för att undvika de identifierade problem. Testade lösningar inkluderar eliminering av dyra operationer, ökad effektivitet i minneshantering genom skalbara minneshanteringsalgoritmer och implementation av datastrukturer som ger bättre lokalitet och därmed bättre användande av cache-strukturen. Verifiering på verkliga testfall visade på uppsnabbningar på åtminstone 6.75 gånger på en processor med 8 kärnor. De flesta fall visade på en uppsnabbning med en faktor större än 7.2. Optimeringarna gav även en uppsnabbning med en faktor på åtminstone 1.5 vid sekventiell exekvering i en tråd. Slutsatsen är därmed att det är möjligt att uppnå nästan linjär skalning med antalet kärnor för denna typ av händelsestyrd simulering.
26

[en] ANALYSIS OF THE CURRENT BRAZILIAN NAVY LOGISTIC STRUCTURE, RELATED THE SPARE PARTS, DUE THE CHALLENGES ARISING FROM THE INCORPORATION OF THE NEW SUBMARINES / [pt] ANÁLISE DA ATUAL ESTRUTURA LOGÍSTICA DA MARINHA DO BRASIL, RELACIONADA AOS SOBRESSALENTES, FRENTE AOS DESAFIOS DECORRENTES DA INCORPORAÇÃO DOS NOVOS SUBMARINOS

MARCELO REIS BEZERRA 11 February 2016 (has links)
[pt] A Marinha do Brasil presta o seu apoio logístico em cenários, por vezes, inóspitos, a partir de uma rede logística que, na sua origem, formou-se com base em conceitos e necessidades operativas, podendo também conviver com ineficiências e acomodações pela falta de concorrentes. Em 2008, fruto de uma decisão política e estratégica, dentro do contexto das relações internacionais no qual o Brasil está inserido, iniciou-se o processo de aquisição de novos submarinos convencionais (S-BR) e o apoio à elaboração do projeto e construção de um submarino nuclear (SN-BR), que se constitui no mais complexo e significativo projeto conduzido pela Marinha nos últimos tempos. Não obstante a importância desse projeto, estaria a cadeia de suprimento de sobressalentes (CSS) da Marinha pronta para prestar o devido apoio logístico ao novo meio operativo? O atual desenho de rede da Marinha atende as necessidades deste apoio? Qual o atual estágio de desenvolvimento da CSS e como promover uma maior integração dessa rede, com vistas a um melhor gerenciamento? Em meio a poucos estudos sobre o assunto e uma significativa carência de informações, o presente trabalho apresenta respostas a essas e outras questões correlatas, que se mostram cada vez mais prementes, diante da previsão de início dos testes de mar do primeiro submarino já 2017. Indubitavelmente, a Marinha é reconhecida pela sua grande capacidade de organização e pelo comprometimento de seus profissionais, mas serão necessárias algumas ações a mais para vencer este enorme desafio logístico. / [en] The Brazilian Navy provides logistics support in areas, sometimes inhospitable, using a logistics network that, in its origin, was formed on the basis of military concepts and needs, and, sometimes coexisting with inefficiencies and without competitors. In 2008, the result of a political and strategic decision, in a context of international relations in which Brazil is inserted, began the process of acquiring new Brazilian hunter-killer Submarine (SSK) and the support for design and construction of the Brazilian Nuclear-Powered Attack Submarine (SSN), which constitutes the most complex and significant Navy project in recent times. Despite the importance of this project, the Navy spare parts supply chain (SSC) would able to provide the appropriate logistics support for the new submarines? The current Navy network design meets the needs of this support? What is the current development stage of SSC and how to upgrade the integration of this network for improve the SCM? Few studies about this subject exist and a significant lack of information, therefore, this presents answers to these and other related issues that are becoming increasingly pressing, given the early prediction of sea tests of the first SSK submarine in 2017. Undoubtedly, the Navy is known to be a great organizational due to her organizational skills and the commitment of its seamen, but this project will require a little more to overcome this huge logistical challenge.
27

The development of a framework for an integrated logistics support system within a high technology industry in a developing country

Lambert, Keith Richard 31 March 2008 (has links)
Competitive and high-risk environments require complex high technology systems, which need to be supported and maintained over their respective life cycles. These systems often have a significant consequence of failure, and require complex management systems to achieve their operational objectives. Significant leadership and management challenges exist, not only in South Africa, but also in other developing countries, where systems may be utilised beyond the lifespan they were designed for and are susceptible to obsolescence. This study was conducted by following a structured process; the research consisted of three stages. The first stage dealt with the research problem, including the delimitations of the study. The second stage was further divided into three phases. The first phase deconstructed the appropriate literature, which included the interpretation of numerous definitions of logistics, integrated logistics support, and the integrated logistics support elements. In addition, the research was grounded in the fields of operations management, supply chain management and integrated logistics support. The second phase focused on the deconstruction of six case studies from four different high technology complex systems. From the analysis of the first two phases followed the third phase of research, which focused on the identification of areas requiring further research. Further research was conducted by means of a questionnaire, the results of which were analysed for variable dependency and variable association. The third stage of the research included the collation and analysis of the findings of the first two stages of research. The analysis utilised the principles of Mode 2 research and design science research, whereby an ILS framework and associated grounded technological rules have been recommended. These recommendations are robust in nature, as they can be applied in the most challenging environment and circumstances as identified. Furthermore, by grounding the theory in the disciplines of operations management, supply chain management and integrated logistics support, the reliability, validity, relevance, and applicability of the study could be substantiated. This implied that the generated theoretical knowledge could be transferred to and applied in practice, and as such, an organisation can reap substantial value added benefits, and gain considerable competitive advantage in the market place by applying this developed ILS framework and associated ILS grounded technological rules. / Business Leadership / D. BL.
28

The development of a framework for an integrated logistics support system within a high technology industry in a developing country

Lambert, Keith Richard 31 March 2008 (has links)
Competitive and high-risk environments require complex high technology systems, which need to be supported and maintained over their respective life cycles. These systems often have a significant consequence of failure, and require complex management systems to achieve their operational objectives. Significant leadership and management challenges exist, not only in South Africa, but also in other developing countries, where systems may be utilised beyond the lifespan they were designed for and are susceptible to obsolescence. This study was conducted by following a structured process; the research consisted of three stages. The first stage dealt with the research problem, including the delimitations of the study. The second stage was further divided into three phases. The first phase deconstructed the appropriate literature, which included the interpretation of numerous definitions of logistics, integrated logistics support, and the integrated logistics support elements. In addition, the research was grounded in the fields of operations management, supply chain management and integrated logistics support. The second phase focused on the deconstruction of six case studies from four different high technology complex systems. From the analysis of the first two phases followed the third phase of research, which focused on the identification of areas requiring further research. Further research was conducted by means of a questionnaire, the results of which were analysed for variable dependency and variable association. The third stage of the research included the collation and analysis of the findings of the first two stages of research. The analysis utilised the principles of Mode 2 research and design science research, whereby an ILS framework and associated grounded technological rules have been recommended. These recommendations are robust in nature, as they can be applied in the most challenging environment and circumstances as identified. Furthermore, by grounding the theory in the disciplines of operations management, supply chain management and integrated logistics support, the reliability, validity, relevance, and applicability of the study could be substantiated. This implied that the generated theoretical knowledge could be transferred to and applied in practice, and as such, an organisation can reap substantial value added benefits, and gain considerable competitive advantage in the market place by applying this developed ILS framework and associated ILS grounded technological rules. / Business Leadership / D. BL.

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