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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.
141

Sur le passage à l'échelle des systèmes de gestion des grandes masses de données

Tran, Viet-Trung 21 January 2013 (has links) (PDF)
La problématique "Big Data" peut être caractérisée par trois "V": * "Big Volume" se rapporte à l'augmentation sans précédent du volume des données. * "Big Velocity" se réfère à la croissance de la vitesse à laquelle ces données sont déplacées entre les systèmes qui les gèrent. * "Big Variety" correspond à la diversification des formats de ces données. Ces caractéristiques imposent des changements fondamentaux dans l'architecture des systèmes de gestion de données. Les systèmes de stockage doivent être adaptés à la croissance des données, et se doivent de passer à l'échelle tout en maintenant un accès à hautes performances. Cette thèse se concentre sur la construction des systèmes de gestion de grandes masses de données passant à l'échelle. Les deux premières contributions ont pour objectif de fournir un support efficace des "Big Volumes" pour les applications data-intensives dans les environnements de calcul à hautes performances (HPC). Nous abordons en particulier les limitations des approches existantes dans leur gestion des opérations d'entrées/sorties (E/S) non-contiguës atomiques à large échelle. Un mécanisme basé sur les versions est alors proposé, et qui peut être utilisé pour l'isolation des E/S non-contiguës sans le fardeau de synchronisations coûteuses. Dans le contexte du traitement parallèle de tableaux multi-dimensionels en HPC, nous présentons Pyramid, un système de stockage large-échelle optimisé pour ce type de données. Pyramid revoit l'organisation physique des données dans les systèmes de stockage distribués en vue d'un passage à l'échelle des performances. Pyramid favorise un partitionnement multi-dimensionel de données correspondant le plus possible aux accès générés par les applications. Il se base également sur une gestion distribuée des métadonnées et un mécanisme de versioning pour la résolution des accès concurrents, ce afin d'éliminer tout besoin de synchronisation. Notre troisième contribution aborde le problème "Big Volume" à l'échelle d'un environnement géographiquement distribué. Nous considérons BlobSeer, un service distribué de gestion de données orienté "versioning", et nous proposons BlobSeer-WAN, une extension de BlobSeer optimisée pour un tel environnement. BlobSeer-WAN prend en compte la hiérarchie de latence et favorise les accès aux méta-données locales. BlobSeer-WAN inclut la réplication asynchrone des méta-données et une résolution des collisions basée sur des "vector-clock". Afin de traîter le caractère "Big Velocity" de la problématique "Big Data", notre dernière contribution consiste en DStore, un système de stockage en mémoire orienté "documents" qui passe à l'échelle verticalement en exploitant les capacités mémoires des machines multi-coeurs. Nous montrons l'efficacité de DStore dans le cadre du traitement de requêtes d'écritures atomiques complexes tout en maintenant un haut débit d'accès en lecture. DStore suit un modèle d'exécution mono-thread qui met à jour les transactions séquentiellement, tout en se basant sur une gestion de la concurrence basée sur le versioning afin de permettre un grand nombre d'accès simultanés en lecture.
142

Reconstruction of holocene environmental changes in northern British Columbia using fossil midges

Fleming, Erin Mattea 11 1900 (has links)
Lake sediments contain the remains of midge communities that may be used as biological proxies for inferring past environmental changes. Freshwater midges, including Chironomidae and Chaoboridae, from two alpine tarns (Pyramid Lake and Bullwinkle Lake) in the Cassiar Mountains of northern British Columbia were used to estimate Holocene palaeotemperature changes, and more specifically, to test for the presence of the Milankovitch thermal maximum, an early Holocene warm interval coinciding with peak Holocene summer solar insolation. Mean July air temperatures were reconstructed using midge-inference models developed via weighted averaging-partial least squares (WA-PLS) regression. Cold-tolerant midge taxa dominate the stratigraphies from both Pyramid and Bullwinkle Lakes; however, warm-adapted species are more common in Bullwinkle Lake. Early Holocene warming is apparent at both lakes, however it is unclear whether this is indicative of the Milankovitch thermal maximum. A decrease in temperature occurs from 8,700-7,900 cal. yr BP at Pyramid Lake, around the same time that the 8,200 cal. yr BP cooling event occurred in the northern hemisphere. During the middle Holocene, records from Pyramid Lake indicate an overall decrease in temperature, with a short period of warmer temperatures that peak at 5,100 cal. yr BP. Temperatures fluctuate little during this time at Bullwinkle Lake. A short warming phase is apparent at both lakes during the late Holocene. July temperatures are highest at 2,000 cal. yr BP (10.5°C) in Pyramid Lake and at 1,200 cal. yr BP (13°C) in Bullwinkle Lake. Thereafter, temperatures return to what they were before the warming occurred, and at Bullwinkle Lake, vary little throughout the remainder of the Holocene.
143

Corporate Social Responsibility : En studie om hur Mälarenergi kan utveckla sitt sociala ansvarstagande

Saha, Robin, Jörgensen, Niklas, Safarova, Julia January 2013 (has links)
Datum: 2013-01-18 Nivå: Kandidatuppsats i företagsekonomi 15 HP Institution: Akademi för hållbar-, samhälls- och teknikutveckling, HST Författare: Niklas Jörgensen Julia Safarova Robin Saha Titel: Corporate Social Responsibility - En studie om hur Mälarenergi kan utveckla sitt sociala ansvarstagande Handledare: Birgitta Schwartz Nyckelord: CSR, Corporate Social Responsibility, Legitimitet, särkoppling, Carrolls CSR pyramid, CR innovation, CR filantropi, CR integration, kommunikation, intressenter Frågeställning: Hur kan Mälarenergi utveckla sitt CSR arbete? Syfte: Syftet med denna kandidatuppsats är att undersöka Mälarenergis arbete inom CSR, samt ta fram förslag på hur Mälarenergi kan utveckla sitt CSR-arbete utifrån deras nuvarande arbete. Metod: Uppsatsen är en kvalitativ studie som tillämpat forskningsansatsen abduktion för att studera Mälarenergis CSR arbete. Studien innehåller två personintervjuer med Miljöchefen på Mälarenergi, vilket är vår primärkälla. Slutsats: Företag bör följa samhällets normer om ett ökat CSR ansvar. Filantropiska insatser som går i linje med ett företags kärnverksamhet eller varumärke skapar trovärdighet. Ett företag som samhället är beroende av bör inte satsa på allt för riskfyllda innovationer. Företag bör satsa på både envägs- och flervägskommunikation av sitt ansvarstagande.
144

Large scale audience interaction with a Kinect sensor

Samini, Ali January 2012 (has links)
We present investigation and designing of a system that interacts with big audience, sitting in a dimmed theater environment. The goal is to automatically detect audiences and some of their actions. Test results indicate that because of low light condition we can’t rely on RGB camera footage in a dimmed environment. We use Microsoft Kinect Sensor to collect data from environment. Kinect is designed to be used with Microsoft Xbox 360 for gaming purposes. It has both RGB and Infrared depth camera. Change in amount of visible light doesn’t affect data from depth camera. Kinect is not a strong camera so it has limitations that we should deal with. Viewing angles of both cameras and depth range of Infrared camera are limited. Viewing angles of depth camera are 43° vertical and 57° horizontal. Most accurate range of depth camera is 1 meter to 4 meters from camera. Non-infrared reflective surfaces cause gaps in depth data. We evaluate possibility of using Kinect camera in a large environment with big audience. “Dome 3D theater” in Norrkoping Visualization Center C, is selected as environment to investigate and test the system. We ran some tests to find the best place and best height for camera to have most coverage. Our system works with optimized image processing algorithms that use 3D depth data instead of regular RGB or Grayscale image. We use “libfreenect”, Open Kinect library to get Kinect sensor up and running. C++ and OpenGL are used as programing languages and graphics interface, respectively. Open GLUT (OpenGL Utility Toolkit) is used for system’s user interface. It was not possible to use Dome environment for every test during the programming period so we recorded some depth footage and used for later tests. While evaluating the possibility of using Kinect in Dome environment, we realized that implementing a voting system would make a good demonstration and test application. Our system counts votes after audiences raise their hands to vote for something.
145

Political Relations Between Turkey And Albania In The Post Cold War Period

Sulku, Mehmed 01 March 2010 (has links) (PDF)
This thesis analyzes the political relations between Turkey and Albania in the post Cold War period. Political and diplomatic relations between Turkey and Albania based on mutual respect for territorial integrity and independence. This study analyzes the continuities and changes in the Turkish foreign policy towards Albania in the post Cold War era. Also changes and continuities in the Albanian foreign policy in the post Cold War period are scrutinized. This work examines the main Turkish foreign policy approaches towards Albania. Patterns of Turkish Balkan policy are examined to find out how Turkey constructed its foreign policy towards Albania after the end of Cold War. Turkey continued its traditional foreign policy according to realist and national interest-based foreign policy formulation. After 1990, Albania was in a period of a transition from its sui generis communist dictatorship regime under Enver Hoxha to an emerging democracy. Albania considered Turkey as a reliable ally in the Balkans. Turkey attached strong importance to stability and security in the Balkan region. Albania has significant role to play in Balkan region. Thus Turkey welcomed the Albanian decision on membership application to NATO and EU. Turkey tried to strength its bilateral relations with Albania and supported lbania&rsquo / s participation in regional and international organizations. This study focuses on the relations of Turkey and Albania within the framework of international and regional organizations.
146

Reconstruction of holocene environmental changes in northern British Columbia using fossil midges

Fleming, Erin Mattea 11 1900 (has links)
Lake sediments contain the remains of midge communities that may be used as biological proxies for inferring past environmental changes. Freshwater midges, including Chironomidae and Chaoboridae, from two alpine tarns (Pyramid Lake and Bullwinkle Lake) in the Cassiar Mountains of northern British Columbia were used to estimate Holocene palaeotemperature changes, and more specifically, to test for the presence of the Milankovitch thermal maximum, an early Holocene warm interval coinciding with peak Holocene summer solar insolation. Mean July air temperatures were reconstructed using midge-inference models developed via weighted averaging-partial least squares (WA-PLS) regression. Cold-tolerant midge taxa dominate the stratigraphies from both Pyramid and Bullwinkle Lakes; however, warm-adapted species are more common in Bullwinkle Lake. Early Holocene warming is apparent at both lakes, however it is unclear whether this is indicative of the Milankovitch thermal maximum. A decrease in temperature occurs from 8,700-7,900 cal. yr BP at Pyramid Lake, around the same time that the 8,200 cal. yr BP cooling event occurred in the northern hemisphere. During the middle Holocene, records from Pyramid Lake indicate an overall decrease in temperature, with a short period of warmer temperatures that peak at 5,100 cal. yr BP. Temperatures fluctuate little during this time at Bullwinkle Lake. A short warming phase is apparent at both lakes during the late Holocene. July temperatures are highest at 2,000 cal. yr BP (10.5°C) in Pyramid Lake and at 1,200 cal. yr BP (13°C) in Bullwinkle Lake. Thereafter, temperatures return to what they were before the warming occurred, and at Bullwinkle Lake, vary little throughout the remainder of the Holocene.
147

Selective Area Growth of AlGaN pyramid with GaN Multiple Quantum Wells

Chen, Hsin-Yu January 2018 (has links)
Since Shuji Nakamura, Hiroshi Amano, and Isamu Akasaki won the 2014 Nobel prize in Physics owing to theircontributions on the invention of efficient blue GaN light emitting diodes, GaN became an even more appealingmaterial system in the research field of optoelectronics. On the other hand, quantum structures or low-dimensionalstructures with properties derived from quantum physics demonstrate superior and unique electrical and opticalproperties, providing a significant potential on novel optoelectronic applications based on the employment of quantumconfinement.   In 2012, our research team at Linköping University utilized pyramid templates, which is an established approach toform quantum structures, to successfully grow GaN pyramids with InGaN hybrid quantum structures, includingquantum wells, quantum wires, and quantum dots. This growth enabled site-controlled pyramids based on selectivearea growth (SAG). After numerous studies on the photoluminescence properties, the mature and controlled growthtechnique was proposed to be adapted for fabrication of AlGaN pyramids on which GaN hybrid quantum structurescan be hosted.   This thesis is dedicated to the subsequent problems of the growth of AlGaN pyramids. It was found that there wasan undesired deposition of a considerable thickness on top the desired AlGaN pyramid with GaN multiple quantumwells. In this thesis, two different directions are explored to find the key solution with a potential of furtheroptimization. On one hand, the growth parameters such as precursors cut-off, carrier gas during cooling, temperatureholding, cooling pressure, III/V ratio, and the possible effect of GaN surfaces are investigated. However, due to theactual inherent properties of the metal-organic chemical vapor deposition reactor used, no promising parameter tuningcan been identified. On the other hand, from post-growth point of view, a KOH aqueous etching solution exhibits apositive result toward removing the undesired deposition. This etching process is suggested to be further optimized toachieve the final goal of eliminating the undesired deposition.
148

Inovação em produtos para a base da pirâmide: Evidências em empresas brasileiras.

Lacerda, Katarina Chaves 29 February 2016 (has links)
Submitted by Morgana Silva (morgana_linhares@yahoo.com.br) on 2016-06-16T17:14:40Z No. of bitstreams: 1 arquivototal.pdf: 1690623 bytes, checksum: c7cb28cf1d38181bfa0249d59fab05be (MD5) / Approved for entry into archive by Viviane Lima da Cunha (viviane@biblioteca.ufpb.br) on 2016-06-20T11:29:54Z (GMT) No. of bitstreams: 1 arquivototal.pdf: 1690623 bytes, checksum: c7cb28cf1d38181bfa0249d59fab05be (MD5) / Approved for entry into archive by Viviane Lima da Cunha (viviane@biblioteca.ufpb.br) on 2016-06-20T11:30:21Z (GMT) No. of bitstreams: 1 arquivototal.pdf: 1690623 bytes, checksum: c7cb28cf1d38181bfa0249d59fab05be (MD5) / Made available in DSpace on 2016-06-20T11:31:18Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1690623 bytes, checksum: c7cb28cf1d38181bfa0249d59fab05be (MD5) Previous issue date: 2016-02-29 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / The bottom of the pyramid market has attracted the attention of companies looking to expand their profit margins and gain competitive advantage. As this is a market with specific characteristics and needs, to innovate and meet these consumers it is necessary for companies to establish innovative strategies favorable to achieve success in this market. Moreover, the internal and external environment organizations has elements that can enable the innovation process, and consequently, the implementation of innovative strategies. In this sense, the objective of this research was to analyze how Brazilian companies have developed innovations in products for the base of the pyramid. Specifically, we sought to investigate the innovations introduced in the market to meet the bottom of the pyramid, describe the innovation strategies used and identify enablers of innovation to the base of the pyramid. A multiple case study as a methodological strategy was used, approaching three companies that direct products to this public. Data were collected by means of semi-structured interviews, direct observations and information obtained on the website for businesses, and others related to them and their innovations. Each case was held at first individually then crosses, based on the relevant categories to specific research objectives. The results showed that, to meet the bottom of the pyramid of consumers, enterprises have developed innovations in products, innovation processes and innovation in marketing, where such innovations are considered as new market disruptive. Multiple innovative strategies have been used for the implementation of innovations in the bottom of the pyramid market by the three companies, including the principal were like: market-based and exploitative. Among the enablers of innovation, the economy, the creation of knowledge and learning, and the recognition of the value and need for innovation were the most prevalent to facilitate the success of innovation for companies. It was concluded that the reality of the Brazilian market, to have a product innovation to the base of the pyramid it is necessary to perform other innovations, is to create this new product in the case of process innovation, is to support the implementation of this product on the market, by means of a marketing innovation; that innovation strategies used together contribute to organizations to achieve their innovative goals; and even acting in different sectors there is correspondence between the enablers of innovation of the companies analyzed. / O mercado da base da pirâmide tem atraído a atenção de empresas que buscam ampliar suas margens de lucro e obter vantagens competitivas. Como se trata de um mercado com características e necessidades específicas, para inovar e atender aos seus consumidores é necessário que as empresas estabeleçam estratégias de inovação propícias a alcançar sucesso neste mercado. Além disso, o contexto interno e externo as organizações apresenta elementos que podem habilitar o processo de inovação e, consequentemente, a implementação das estratégias de inovação. Nesse sentido, o objetivo desta pesquisa consistiu em analisar como empresas brasileiras têm desenvolvido inovações em produtos para a base da pirâmide. Especificamente, buscou-se investigar as inovações introduzidas no mercado para atender à base da pirâmide, descrever as estratégias de inovação utilizadas e identificar os habilitadores da inovação para a base da pirâmide. Foi utilizado um estudo de caso múltiplo como estratégia metodológica, abordando três empresas que direcionam produtos a tal público. Os dados foram coletados por meio de entrevistas semiestruturadas, observação direta, e informações obtidas nos sites das empresas e em outros relacionados a elas e suas inovações. Cada caso foi analisado de forma individual e cruzada, com base nas categorias pertinentes aos objetivos específicos da pesquisa. Os resultados evidenciaram que, para atender aos consumidores da base da pirâmide, as empresas têm desenvolvido inovações em produtos, inovação em processos e inovação em marketing, e que tais inovações são consideradas como disruptivas de novo mercado. Múltiplas estratégias de inovação foram utilizadas para a implementação das inovações no mercado da base da pirâmide pelas três empresas, entre as quais as principais foram as do tipo: baseada no mercado e exploitative. Entre os habilitadores da inovação, a economia, a criação de conhecimento e aprendizagem, e o reconhecimento do valor e da necessidade da inovação foram os mais preponderantes para facilitar o sucesso das inovações das empresas. Conclui-se que, na realidade do mercado brasileiro, para se ter uma inovação em produto para a base da pirâmide faz-se necessário realizar outras inovações, seja para gerar esse novo produto, no caso da inovação em processos, seja para apoiar a implementação desse produto no mercado, por meio de uma inovação de marketing; que as estratégias de inovação utilizadas em conjunto contribuem para que as organizações alcancem seus objetivos inovativos; e que mesmo atuando em setores diferentes há correspondência entre os habilitadores da inovação das empresas analisadas.
149

Área e Volume de Prisma e Pirâmide / Area and Volume of Prism and Pyramid

Reis, Mônica de Paula Tolentino 15 April 2013 (has links)
Made available in DSpace on 2015-03-26T14:00:06Z (GMT). No. of bitstreams: 1 texto completo.pdf: 3409808 bytes, checksum: 686182ebc97d583ffbff6107c6079126 (MD5) Previous issue date: 2013-04-15 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This paper presents strategies for teaching polyhedra in high school, focusing on the calculation of arca and volume, with applications of new technologies as free software and easily accessible in the day to day activities. Here we describe also workshops with activities related to polyhedra, with students and teachers of the school, where it was found that most teachers did not use softwares and activities contained in the textbook adopted. / Este trabalho apresenta estratégias para o ensino de poliedros no ensino médio, enfocando o cálculo de área e volume, com aplicações das novas tecnologias como softwares gratuitos e de fácil acesso em atividades do dia a dia. Aqui também descrevemos oficinas com atividades relacionadas aos poliedros, com alunos e professores do ensino médio, onde constatou-se que a maioria dos professores não faziam uso de softwares e atividades contidas no livro didático adotado.
150

Vyznavač buddhismu na ošetřovací jednotce / Follower of Buddhism on unit care

ČOUDKOVÁ, Lenka January 2007 (has links)
The problems of buddhism on a care ward has been theme of our works, which we{\crq}ve devided in theoretical and practical part. In theoretical part, nurses and also wider public can acquiant with basic informations of buddhism. Theoretical part is devided into eight main chapters. In theoretical part we{\crq}ve reached for {\clqq}List dissimilarities in satisfying needs of buddhism confessors to health and diseases.`` In practical part we discuss reults of our research. To get data, we used technique of questionary. Content of third aim was {\clqq}Compare sister knowledge of Southbohemian and Centralbohemian region in specifications of buddhism confessor care.`` We set two hypotheses for this aim. Hypothesis no.1 considered, that nurses are able to satisfy needs of buddhist with their professionality and hypothesis no.2 considered, that nurses knowledge about care probleme in Southbohemian region is lower than in Centralbohemian region. Both hypotheses were confirmed after data processing. Pieces of knowledge from theoretical and practical part are included in the end of this work. There is also mentioned usage of work in practice {--} motivate nurses in attractive form, so they have interest to learn new informations about new cultures and ethnic communities. Nurses also to get wider general view, necessary at this time. In the end in separate chapter the {\clqq}Care specifications of buddhism confessors in sanitations`` is described, which was subject of second aim. For completion of this aim the standard of nursing care was elaborated: {\clqq}Principles of implementation on nursing care, confessing by buddhists in sanitations.``

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