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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.
31

Análise das dinâmicas econômica, social e ambiental da carcinicultura no Estado do Rio Grande do Norte

Mattos, Paloma de January 2007 (has links)
A carcinicultura potiguar está sob forte pressão das organizações governamentais e principalmente não governamentais, que associam a destruição de ambientes naturais à expansão das áreas de produção de camarão. Este trabalho visa caracterizar e avaliar o setor de carcinicultura no Rio Grande do Norte, identificando a dinâmica econômica, social e ambiental do setor, a partir da análise da conduta econômica, social e ambiental, frente às pressões da estrutura de mercado em que operam. Para isso, utiliza o modelo ECP-Triplo de estrutura, conduta e performance, onde as empresas submetidas a pressões econômicas, sociais e ambientais em sua estrutura industrial adotam uma conduta econômica, social e ambiental para obter resultados também tríplices na performance econômica, ambiental e social. Foi realizada uma pesquisa quali-quantitativa, por meio da aplicação de um questionário estruturado e entrevistas. O questionário foi aplicado em 21 empresas nas zonas homogêneas das regiões Agreste, Mossoroense, Litoral Norte e Litoral Oriental do estado do Rio Grande do Norte. A pesquisa coletou dados junto a proprietários, diretores, gerentes e responsáveis por unidades de laboratório de pós-larva, fazendas de engorda e processamento / beneficiamento que compõem os principais elos da cadeia produtiva do camarão cultivado. A análise dos resultados demonstra que a indústria de cultivo de camarões no Rio Grande do Norte apresenta a maior produção no Brasil, porém, ainda falta a aplicação de condutas econômicas, sociais e ambientais adequadas para suportar as pressões da estrutura da indústria. Conclui-se que a descapitalização do setor, a demora na concessão das licenças necessárias para a implantação e ampliação das fazendas, a falta de incentivos governamentais, a pressão por parte das organizações não governamentais, a falta de ambiente cooperativo entre as empresas, a ausência de políticas públicas de incentivo à produção, os juros altos e a elevada carga tributária são alguns dos fatores que vêm prejudicando o desenvolvimento da carcinicultura no estado do Rio Grande do Norte. As instituições de pesquisa, juntamente com a Associação Brasileira de Criadores de Camarão (ABCC) e os governos federal, estadual e municipal precisam definir uma forma de exploração sustentável do ecossistema manguezal e elaborar políticas ambientais específicas para a carcinicultura. Enfim, é necessária, a implantação e utilização de uma conduta ambiental e socialmente responsável como estratégia para que a carcinicultura potiguar alcance níveis de excelência e prosperidade, mantendo uma vantagem competitiva permanente. / The shrimp aquaculture produced from Rio Grande do Norte have been under pressure by governmental and non-governmental organizations, which associate the natural environment destruction to the expansion of shrimps’productive areas. This work aims to characterizer and evaluate the aquaculture shrimp sector in Rio Grande do Norte, identifying the economic, social and environmental dynamic of this sector, based on the analysis of the economic, social and environmental conduct, front to the pressures of the market’s structure in which it operates. To do this analysis, this work used the Triple-SCP model of structure, conduct and performance, in which companies under economic, environmental and social pressure in its industrial structure follow an economic, environmental and social conducts to obtain triple results in the economic, environmental and social performance. In this research a qualitative and quantitative methodologies have been done and it applied structural questionnaires and did some interviews. The questionnaire was applied to 21 companies in homogeneous zones from the region of Agreste, Mossoroense, Litoral Norte and Litoral Oriental from Rio Grande do Norte State. The corpus was collected and the participants were owners, directors and managers responsible for the worm laboratory, fattening farming and processing which set the link of the preserved shrimp productive chain. The analysis shows that the shrimp aquaculture industry in Rio Grande do Norte has the major production in Brazil, however, it’s missing the adequated application of economic, social and environmental conducts to support the structure of the industry’s pressure. To conclude, we suggest that the sector’s descapitalization, the licenses’delay necessary to the farming implementation and expansion, the missing of governmental incentive and the pressure of non-governmental organizations, the missing of cooperative environment among companies, and the absence of public politics to motivate the production, the high interest and raised tributive are some of the reasons that have damaged the development of shrimp aquaculture in the Rio Grande do Norte State. Researches Institutions as well as Brazilian Shrimp Farmers Association (ABCC) and the Federal, State and Municipal Governments should define a way for a sustainable exploration of the mangrove systems and elaborate a specific environmental politic to shrimp aquaculture. It´s necessary to implement the environmental utilization and social conducts as strategies to the shrimp aquaculture in the Rio Grande do Norte to reach levels of excellence and prosperity, as well as to sustain a permanent competitive advantage.
32

Chladová odolnost hladinatky Velia caprai: vliv aklimace a věkové třídy na bod podchlazení / Cold resistance of the water cricket Velia caprai: the influence of acclimation age class and food availability on the supercooling point

NOVOTNÁ, Iveta January 2012 (has links)
Recently, the cold resistance becomes a common topic in scientific articles. If we focus on order Heteroptera, we can find a lot of studies dealing with the cold resistance or with the supercooling point (SCP) and also with the factors that influence them. According to the general rule, the acclimation at low temperatures increases the cold resistance. Therefore, the main goal of this thesis is to find out, whether the acclimation also increases the cold resistance of the water cricket Velia caprai Tamanini, 1947 (Veliidae), with the intention to measure SCP of the water crickets depending on the acclimation temperature and the length of exposure. Due to the high mortality (the 284 individuals remained alive of total 1300) and due to the technical difficulties in measuring of SCP (measured only 36 individuals) it was necessary to modify the original goal of the thesis. The new goal was to test the influence of acclimation (during one month vs. one week) and the influence of different temperatures (0°C, 5°C, 10°C) on SCP of V. caprai. The individuals used for this measurement were collected during the year 2010 and in March 2011. The results of this thesis did not confirm the hypothesis that the acclimation at low temperatures increases the cold resistance. The individuals who were acclimated at a higher temperature have the values of SCP demonstrably lower than the individuals who were acclimated at low temperatures. The individuals who overwinter for the first time have arguably higher cold resistance than the individuals who overwinter for the second time. Probable cause of these results is the fact that the water cricket V. caprai does not start with diapause in the fall but it overwinters in quiescence.
33

Análise das dinâmicas econômica, social e ambiental da carcinicultura no Estado do Rio Grande do Norte

Mattos, Paloma de January 2007 (has links)
A carcinicultura potiguar está sob forte pressão das organizações governamentais e principalmente não governamentais, que associam a destruição de ambientes naturais à expansão das áreas de produção de camarão. Este trabalho visa caracterizar e avaliar o setor de carcinicultura no Rio Grande do Norte, identificando a dinâmica econômica, social e ambiental do setor, a partir da análise da conduta econômica, social e ambiental, frente às pressões da estrutura de mercado em que operam. Para isso, utiliza o modelo ECP-Triplo de estrutura, conduta e performance, onde as empresas submetidas a pressões econômicas, sociais e ambientais em sua estrutura industrial adotam uma conduta econômica, social e ambiental para obter resultados também tríplices na performance econômica, ambiental e social. Foi realizada uma pesquisa quali-quantitativa, por meio da aplicação de um questionário estruturado e entrevistas. O questionário foi aplicado em 21 empresas nas zonas homogêneas das regiões Agreste, Mossoroense, Litoral Norte e Litoral Oriental do estado do Rio Grande do Norte. A pesquisa coletou dados junto a proprietários, diretores, gerentes e responsáveis por unidades de laboratório de pós-larva, fazendas de engorda e processamento / beneficiamento que compõem os principais elos da cadeia produtiva do camarão cultivado. A análise dos resultados demonstra que a indústria de cultivo de camarões no Rio Grande do Norte apresenta a maior produção no Brasil, porém, ainda falta a aplicação de condutas econômicas, sociais e ambientais adequadas para suportar as pressões da estrutura da indústria. Conclui-se que a descapitalização do setor, a demora na concessão das licenças necessárias para a implantação e ampliação das fazendas, a falta de incentivos governamentais, a pressão por parte das organizações não governamentais, a falta de ambiente cooperativo entre as empresas, a ausência de políticas públicas de incentivo à produção, os juros altos e a elevada carga tributária são alguns dos fatores que vêm prejudicando o desenvolvimento da carcinicultura no estado do Rio Grande do Norte. As instituições de pesquisa, juntamente com a Associação Brasileira de Criadores de Camarão (ABCC) e os governos federal, estadual e municipal precisam definir uma forma de exploração sustentável do ecossistema manguezal e elaborar políticas ambientais específicas para a carcinicultura. Enfim, é necessária, a implantação e utilização de uma conduta ambiental e socialmente responsável como estratégia para que a carcinicultura potiguar alcance níveis de excelência e prosperidade, mantendo uma vantagem competitiva permanente. / The shrimp aquaculture produced from Rio Grande do Norte have been under pressure by governmental and non-governmental organizations, which associate the natural environment destruction to the expansion of shrimps’productive areas. This work aims to characterizer and evaluate the aquaculture shrimp sector in Rio Grande do Norte, identifying the economic, social and environmental dynamic of this sector, based on the analysis of the economic, social and environmental conduct, front to the pressures of the market’s structure in which it operates. To do this analysis, this work used the Triple-SCP model of structure, conduct and performance, in which companies under economic, environmental and social pressure in its industrial structure follow an economic, environmental and social conducts to obtain triple results in the economic, environmental and social performance. In this research a qualitative and quantitative methodologies have been done and it applied structural questionnaires and did some interviews. The questionnaire was applied to 21 companies in homogeneous zones from the region of Agreste, Mossoroense, Litoral Norte and Litoral Oriental from Rio Grande do Norte State. The corpus was collected and the participants were owners, directors and managers responsible for the worm laboratory, fattening farming and processing which set the link of the preserved shrimp productive chain. The analysis shows that the shrimp aquaculture industry in Rio Grande do Norte has the major production in Brazil, however, it’s missing the adequated application of economic, social and environmental conducts to support the structure of the industry’s pressure. To conclude, we suggest that the sector’s descapitalization, the licenses’delay necessary to the farming implementation and expansion, the missing of governmental incentive and the pressure of non-governmental organizations, the missing of cooperative environment among companies, and the absence of public politics to motivate the production, the high interest and raised tributive are some of the reasons that have damaged the development of shrimp aquaculture in the Rio Grande do Norte State. Researches Institutions as well as Brazilian Shrimp Farmers Association (ABCC) and the Federal, State and Municipal Governments should define a way for a sustainable exploration of the mangrove systems and elaborate a specific environmental politic to shrimp aquaculture. It´s necessary to implement the environmental utilization and social conducts as strategies to the shrimp aquaculture in the Rio Grande do Norte to reach levels of excellence and prosperity, as well as to sustain a permanent competitive advantage.
34

Análise das dinâmicas econômica, social e ambiental da carcinicultura no Estado do Rio Grande do Norte

Mattos, Paloma de January 2007 (has links)
A carcinicultura potiguar está sob forte pressão das organizações governamentais e principalmente não governamentais, que associam a destruição de ambientes naturais à expansão das áreas de produção de camarão. Este trabalho visa caracterizar e avaliar o setor de carcinicultura no Rio Grande do Norte, identificando a dinâmica econômica, social e ambiental do setor, a partir da análise da conduta econômica, social e ambiental, frente às pressões da estrutura de mercado em que operam. Para isso, utiliza o modelo ECP-Triplo de estrutura, conduta e performance, onde as empresas submetidas a pressões econômicas, sociais e ambientais em sua estrutura industrial adotam uma conduta econômica, social e ambiental para obter resultados também tríplices na performance econômica, ambiental e social. Foi realizada uma pesquisa quali-quantitativa, por meio da aplicação de um questionário estruturado e entrevistas. O questionário foi aplicado em 21 empresas nas zonas homogêneas das regiões Agreste, Mossoroense, Litoral Norte e Litoral Oriental do estado do Rio Grande do Norte. A pesquisa coletou dados junto a proprietários, diretores, gerentes e responsáveis por unidades de laboratório de pós-larva, fazendas de engorda e processamento / beneficiamento que compõem os principais elos da cadeia produtiva do camarão cultivado. A análise dos resultados demonstra que a indústria de cultivo de camarões no Rio Grande do Norte apresenta a maior produção no Brasil, porém, ainda falta a aplicação de condutas econômicas, sociais e ambientais adequadas para suportar as pressões da estrutura da indústria. Conclui-se que a descapitalização do setor, a demora na concessão das licenças necessárias para a implantação e ampliação das fazendas, a falta de incentivos governamentais, a pressão por parte das organizações não governamentais, a falta de ambiente cooperativo entre as empresas, a ausência de políticas públicas de incentivo à produção, os juros altos e a elevada carga tributária são alguns dos fatores que vêm prejudicando o desenvolvimento da carcinicultura no estado do Rio Grande do Norte. As instituições de pesquisa, juntamente com a Associação Brasileira de Criadores de Camarão (ABCC) e os governos federal, estadual e municipal precisam definir uma forma de exploração sustentável do ecossistema manguezal e elaborar políticas ambientais específicas para a carcinicultura. Enfim, é necessária, a implantação e utilização de uma conduta ambiental e socialmente responsável como estratégia para que a carcinicultura potiguar alcance níveis de excelência e prosperidade, mantendo uma vantagem competitiva permanente. / The shrimp aquaculture produced from Rio Grande do Norte have been under pressure by governmental and non-governmental organizations, which associate the natural environment destruction to the expansion of shrimps’productive areas. This work aims to characterizer and evaluate the aquaculture shrimp sector in Rio Grande do Norte, identifying the economic, social and environmental dynamic of this sector, based on the analysis of the economic, social and environmental conduct, front to the pressures of the market’s structure in which it operates. To do this analysis, this work used the Triple-SCP model of structure, conduct and performance, in which companies under economic, environmental and social pressure in its industrial structure follow an economic, environmental and social conducts to obtain triple results in the economic, environmental and social performance. In this research a qualitative and quantitative methodologies have been done and it applied structural questionnaires and did some interviews. The questionnaire was applied to 21 companies in homogeneous zones from the region of Agreste, Mossoroense, Litoral Norte and Litoral Oriental from Rio Grande do Norte State. The corpus was collected and the participants were owners, directors and managers responsible for the worm laboratory, fattening farming and processing which set the link of the preserved shrimp productive chain. The analysis shows that the shrimp aquaculture industry in Rio Grande do Norte has the major production in Brazil, however, it’s missing the adequated application of economic, social and environmental conducts to support the structure of the industry’s pressure. To conclude, we suggest that the sector’s descapitalization, the licenses’delay necessary to the farming implementation and expansion, the missing of governmental incentive and the pressure of non-governmental organizations, the missing of cooperative environment among companies, and the absence of public politics to motivate the production, the high interest and raised tributive are some of the reasons that have damaged the development of shrimp aquaculture in the Rio Grande do Norte State. Researches Institutions as well as Brazilian Shrimp Farmers Association (ABCC) and the Federal, State and Municipal Governments should define a way for a sustainable exploration of the mangrove systems and elaborate a specific environmental politic to shrimp aquaculture. It´s necessary to implement the environmental utilization and social conducts as strategies to the shrimp aquaculture in the Rio Grande do Norte to reach levels of excellence and prosperity, as well as to sustain a permanent competitive advantage.
35

Akviziční systém na platformě STEMLab / STEMLab based data acquisition system

Pavlík, Radim January 2019 (has links)
Thesis deals with design of acquisition system, working on developing platform STEMLab (Red Pitaya). Goal is possibility of monitoring analog signals with adjustable sampling frequency and length of acquisition. Software was created for both controlling part (Python application) and for platform itself (embedded C, Python) using the appropriate FPGA-HW design (HDL). Thesis describe how to work with platform ecosystem, control and behaviour of aplications created during the proces of getting acquainted with the platform and options how aplications could be created.
36

Supply Chain Performance Measurement Tool : Ett verktyg utvecklat för mätning av logistisk prestanda / Supply Chain Performance Measurement Tool : A tool developed to measure supply chain performance

Karlflo, Nils, Knutsson, Simon January 2020 (has links)
Under de senaste decennierna har världen genomgått en stadig ökning av konsumtion av varor. Medan konkurrensen mellan företag ständigt ökar är det viktigare än någonsin att förse konsumenter med rätt produkt, vid rätt tidpunkt och till rätt pris. På grund av detta har supply chain management blivit en nyckelfunktion i de flesta företag, inte minst eftersom det har en stor inverkan på viktiga aspekter som kundtjänst, lönsamhet och företags generella prestanda. För att som företag uppnå förbättringar och uppnå mål såsom ökad konkurrenskraft är det fördelaktigt att mäta och analysera sin prestanda kontinuerligt. Rapporten syftar till att undersöka vilka mätvärden som representerar försörjningskedjans prestanda och hur dessa kan kombineras till en modell. En litteraturstudie genomfördes där data samlades in från ett stort antal vetenskapliga artiklar. För att få ytterligare kunskap och expertis från e-handelsbranschen samlades data in genom intervjuer och dokument från företaget Jollyroom, som sedan jämfördes med tidigare studier inom forskningsområdet. Den presenterade litteraturen indikerar att det finns ett befintligt utbud av modeller för att mäta prestanda inom försörjningskedjor, men få av dem tar hänsyn till aspekter som tillämpning, benchmarking eller lokalisering av förbättringar. Med hänsyn till detta har en föreslagen modell med namnet Supply Chain Performance Measurement Tool (SCPMT) utformats för att mäta supply chain performance med hjälp av en uppsättning av 61 mätvärden. Den föreslagna modellen använder en hierarkisk struktur vilket möjliggör konsolidering av mätetalen utefter både processer och attribut. Modellens processer är uppdelade i kategorierna anskaffning, intern affärsprocess, distribution, retur och stöd- & ledningsprocess. Modellen använder även de tre finansiella attributen intäkter, kostnader och tillgångar. Mätvärdena som används i modellen bör fördelaktigt jämföras mot ett måltal som sätts av modellens användare vilket kommer att generera en grad av måluppfyllelse. / During the last decades the world has seen a steady increase in the consumption of goods. While the competition among companies is constantly increasing it is more important than ever to provide customers with the right product, at the right time and at the right price. Due to this, supply chain management has become a key function in most companies as it has a large impact on important aspects such as customer service, profitability and the overall performance of a business. In order to achieve improvements and accomplish goals such as increased competitiveness, it is preferable to measure and analyze its performance constantly. This paper aims to investigate which metrics that represent supply chain performance and how these can be combined into a model. A literature study was conducted where data was collected from a large number of scientific papers. In order to gain further knowledge and expertise from the industry of e-commerce, data was collected through interviews and documents at the company Jollyroom, and then compared to previous studies. The literature presented indicates that a range of models exist to measure supply chain performance, however, only some of them take application, benchmarking or localization of improvements into consideration. With this taken into consideration, a proposed model named Supply Chain Performance Measurement Tool (SCPMT) has been designed in order measure supply chain performance using a set of 61 metrics. The proposed model uses a hierarchical structure and consists of metrics that can be consolidated to processes and attributes. The processes used in the model are categorized as source, internal business process, distribution, return and supportive/management process. The model uses the three financial attributes revenues, costs and assets. The metrics used in the model should preferably be compared against an objective or target set by the user of the model, which will generate a rate of fulfillment.
37

The Perceptions, Beliefs, and Practices of Cancer Center Program Administrators Regarding Cancer Survivorship Care Plans

Everhart, Frances Jeannine 19 October 2017 (has links)
No description available.
38

台灣公關產業經營策略研究

黎明珍 Unknown Date (has links)
台灣公關產業蓬勃發展,在數十年的時間內,全台約有兩百家的公關公司,筆者恭逢其盛,在實務上身體力行,亦期待透過學術研究對產業做出更多的貢獻。然近年來因台灣整體經濟下滑,企業廣告預算銳減,反而對於公關行銷的操作有更進一步的採用,網際網路的發達亦對企業與公關產生了不同的影響。 本研究試圖以SCP與五力分析為經,深度訪談為緯,架構出公關產業的具體相貌。挑選出國內具有代表性的公關公司,透過創辦人或高階經理人的觀點,以商業的觀點進一步的剖析此一產業。 研究結果發現,目前的公關公司分為三種型態:專業公關顧問、整合行銷公關以及活動公關。目前專業公關顧問扮演公司的策略夥伴,長期建構公司的形象,以外商公司為主要的服務對象;整合行銷公關則以豐富、全方位、最少預算達到最大效果為其利基;活動公關則是以新鮮、大量客製化的活動來吸引顧客。此三者都受到媒體、媒體採購公司以及Event公司的強大競爭。
39

Methods for optimizing large scale thermal imaging camera placement problems / Optimeringsmetoder för utformning av storskalig brandövervakning med värmekameror

Lindell, Hugo January 2019 (has links)
The objective of this thesis is to model and solve the problem of placing thermal imaging camera for monitoring piles of combustible bio-fuels. The cameras, of different models, can be mounted at discrete heights on poles at fixed positions and at discrete angles, and one seeks camera model and mounting combinations that monitor as much of the piles as possible to as low cost as possible. Since monitoring all piles may not be possible or desired, due to budget or customer constrains, the solution to the problem is a set of compromises between coverage and cost. We denote such a set of compromises a frontier. In the first part of the thesis a way of modelling the problem is presented. The model uses a discrete formulation where the area to monitor is partitioned into a grid of cells. Further, a pool of candidate camera placements is formed, containing all combinations of camera models and mounting positions. For each camera in this pool, all cells monitored are deduced using ray-casting. Finally, an optimization model is formulated, based on the pool of candidate cameras and their monitoring of the grid. The optimization model has the two objectives of minimizing the cost while maximizing the number of covered cells. In the second part, a number of heuristic optimization algorithms to solve the problem is presented: Greedy Search, Random Greedy Search, Fear Search, Unique Search, Meta-RaPS and Weighted Linear Neighbourhood Search. The performance of these heuristics is evaluated on a couple of test cases from existing real world depots and a few artificial test instances. Evaluation is made by comparing the solution frontiers using various result metrics and graphs. Whenever practically possible, frontiers containing all optimal cost and coverage combinations are calculated using a state-of-the-art solver. Our findings indicate that for the artificial test instances, the state-of-the-art solver is unmatched in solution quality and uses similar execution time as the heuristics. Among the heuristics, Fear Search and Greedy Search were the strongest performing. For the smaller real world instances, the state-of-the-art solver was still unmatched in terms of solution quality, but generating the frontiers in this way was fairly time consuming. By generating the frontiers using Greedy Search or Random Greedy Search we obtained solutions of similar quality as the state-of-the-art solver up to 70-80% coverage using one hundredth and one tenth of the time, respectively. For the larger real world problem instances, generating the frontier using the state-of-the-art solver was extremely time consuming and thus sometimes impracticable. Hence the use of heuristics is often necessary. As for the smaller instances, Greedy Search and Random Greedy Search generated the frontiers with the best quality. Often even better full coverage solutions could be found by the more time consuming Fear Search or Unique Search. / Syftet med detta examensarbete är att modellera och lösa kameraplaceringsproblemet då IR-kameror ska användas för brandövervakning av fastbränslehögar. Problemet består i att givet ett antal kamera modeller och monteringsstolpar bestämma de kombinationer av placeringar och modeller sådana att övervakningen av högarna är maximal, för alla möjliga kostnadsnivåer. I den första delen av examensarbetet presenteras en modell för detta kameraplaceringsproblem. Modellen använder sig av en diskret formulering, där området om ska övervaras är representerad av ett rutnät. De möjliga kameravalen beskrivas med en diskret mängd av möjliga kameraplaceringar. För att utröna vilka celler inom rutnätet som en kameraplacering övervakar används metoden ray-casting. Utifrån mängden av möjliga kameraplaceringar kan en optimeringsmodell med två målfunktioner formuleras. Målet i den första målfunktionen är att minimera kostnaden för övervakningen och i den andra att maximera storleken på det övervakade området. Utgående från denna modell presenteras därefter ett antal algoritmer för att lösa modellen. Dessa är: Greedy Search, Random Greedy Search, Fear Search, Unique Search, Meta-RaPS och Weighted Linear Neighbourhood Search. Algoritmerna utvärderas på två konstgjorda testproblem och ett antal problem från verkliga fastbränslelager. Utvärderingen baseras på lösningsfronter (grafer över de icke-dominerade lösningarna med de bästa kombinationerna av kostnad och täckning) samt ett antal resultatmått som tid, lägsta kostnad för lösning med full täckning, etc... Vid utvärderingen av resultaten framkom att för de konstgjorda testinstanserna presterade ingen av heuristikerna jämförbart med en standardlösare, varken i termer av kvalitén på lösningarna eller med hänsyn tagen till tidsåtgången. De heuristiker som presterade bäst på dessa problem var framförallt Fear Search och Greedy Search. Även på de mindre probleminstanserna från existerande fastbränslelager hittade standardlösaren optimala lösningsfronter och en lösning med full täckning, men tidsåtgången var här flera gånger större jämfört med vissa av heuristikerna. På en hundra- respektive en tiondel av tiden kan Greedy Search eller Random Greedy Search heuristikerna finna en lösningsfront som är jämförbar med standardlösare, upp till 70-80% täckning. För de största probleminstanserna är tidsåtgången vid användning av standardlösare så pass stor att det i många fall är praktiskt svårt att lösa problemen, både för att generera fronten och att hitta en lösning med full täckning. I dessa fall är heuristiker oftast de enda möjliga alternativen. Vi fann att Greedy Search och Random Greedy Search var de heuristiker som, liksom för de mindre probleminstanserna, genererade de bästa lösningsfronterna. Ofta kunde dock en bättre lösning för full täckning hittas med hjälp av Fear Search eller Unique Search.
40

高科技產業分析架構研究-以LCD產業為例

洪崑欽 Unknown Date (has links)
高科技產業的特性為資本密集、技術密集與人才密集,產品生命週期較為短。在面臨全球化的競爭挑戰時,面對的壓力遠高於傳統產業。因此如何提昇台灣高科技產業得的水準和強化產業競爭力,實為當今台灣廠商與政府應面對的重要問題。 LCD產業相關技術發展已近成熟,加上台灣為全球筆記型電腦及PC監視器的生產重鎮,具有不得不進入LCD產業的壓力。此外,液晶顯示技術的發展也帶動其他電子產品的創新,範圍涵蓋了資訊、通訊及消費性電子商品等。LCD具有輕薄、省電、無輻射、不佔空間及可攜性等優勢,隨著多元化應用的推廣及技術的發展,產業整體市場規模將急遽成長。 高科技產業如LCD產業,對於國內相關產業的關鍵零組件自主性與促進產業升級都有重大的影響。在面對日本及韓國強烈的競爭下,台灣廠商如何在LCD產業的全世界市場領域中建立競爭優勢,找到適當定位,是一個值得討論的重要課題。 本研究以產業經濟學的產業結構-廠商行為-績效(Structure—Conduct—Performance, S-C-P)理論,為主要的分析架構,再配合Porter的五力分析架構,價值鏈分析和國家優勢競爭之鑽石模型概念分析台灣的LCD產業。希望透過研究的過程,找出一套適用於LCD產業的產業分析架構。在實務上希望能夠作為業者擬定企業競爭策略及政府擬定產業政策的參考。由於本研究有其研究的限制,本文也開列出後續研究的建議,希望提供後者更進一步的研究方向。

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