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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.
181

Ein Beitrag zur Problematik der Integration virtueller Maschinen / A contribution to the problem of integrating virtual machines

Kugel, Rudolf January 2005 (has links)
Moderne Softwaresysteme sind komplexe Gebilde, welche häufig im Verbund mit anderen technischen und betriebswirtschaftlichen Systemen eingesetzt werden. Für die Hersteller solcher Systeme stellt es oft eine große Herausforderung dar, den oft weit reichenden Anforderungen bezüglich der Anpassbarkeit solcher Systeme gerecht zu werden. Zur Erfüllung dieser Anforderungen hat es sich vielfach bewährt, eine virtuelle Maschine in das betreffende System zu integrieren. <br><br> Die Dissertation richtet sich insbesondere an Personen, die vor der Aufgabe der Integration virtueller Maschinen in bestehende Systeme stehen und zielt darauf ab, solche für die Entscheidung über Integrationsfragen wichtigen Zusammenhänge klar darzustellen. <br><br> Typischerweise treten bei der Integration einer virtuellen Maschine in ein System eine Reihe unterschiedlicher Problemstellungen auf. Da diese Problemstellungen oft eng miteinander verzahnt sind, ist eine isolierte Betrachtung meist nicht sinnvoll. Daher werden die Problemstellungen anhand eines zentral gewählten, sehr umfangreichen Beispiels aus der industriellen Praxis eingeführt. Dieses Beispiel hat die Integration der "Java Virtual Machine" in den SAP R/3 Application Server zum Gegenstand. Im Anschluss an dieses Praxisbeispiel wird die Diskussion der Integrationsproblematik unter Bezug auf eine Auswahl weiterer, in der Literatur beschriebener Integrationsbeispiele vertieft. <br><br> Das Hauptproblem bei der Behandlung der Integrationsproblematik bestand darin, dass die vorgefundenen Beschreibungen, der als Beispiel herangezogenen Systeme, nur bedingt als Basis für die Auseinandersetzung mit der Integrationsproblematik geeignet waren. Zur Schaffung einer verwertbaren Diskussionsgrundlage war es daher erforderlich, eine homogene, durchgängige Modellierung dieser Systeme vorzunehmen. Die Modellierung der Systeme erfolgte dabei unter Verwendung der "Fundamental Modeling Concepts (FMC)". Die erstellten Modelle sowie die auf Basis dieser Modelle durchgeführte Gegenüberstellung der unterschiedlichen Ansätze zur LÖsung typischer Integrationsprobleme bilden den Hauptbeitrag der Dissertation. <br><br> Im Zusammenhang mit der Integration virtueller Maschinen in bestehende Systeme besteht häufig der Bedarf, zeitgleich mehrere "Programme" durch die integrierte virtuelle Maschine ausführen zu lassen. Angesichts der Konstruktionsmerkmale vieler heute verbreiteter virtueller Maschinen stellt die Realisierung eines "betriebsmittelschonenden Mehrprogrammbetriebs" eine große Herausforderung dar. Die Darstellung des Spektrums an Maßnahmen zur Realisierung eines "betriebsmittelschonenden Mehrprogrammbetriebs" bildet einen zweiten wesentlichen Beitrag der Dissertation. / Modern software systems are complex entities which are frequently linked to other technical and economic systems. For the manufacturers of such systems it often represents a big challenge to fulfill the demanding requirements concerning the adaptability of such systems. One possible way to meet the demands is to integrate a virtual machine into the system concerned. <br><br> This thesis is primarily intended to be used by persons who intend to integrate a virtual machine into an existing system. The primary goal is to pinpoint those dependencies which are important for decisions about integration questions. <br><br> The integration of a virtual machine into an existing system is typically accompanied by many different problems. Since these problems are often closely interconnected, it often makes no sense to treat them individually. Therefore, the problems are introduced along with an adequately chosen, complex real life example. This example deals with the integration of the "Java Virtual Machine" into the "SAP R/3" application server. Following this practical example, the discussion of integration problems is deepened by presenting an assortment of additional examples taken from the literature. <br><br> The main problem encountered during the treatment of the integration process was caused by inadequate and incomparable descriptions of the samples used. The existing descriptions were therefore unsuitable as a basis of discussion for the integration topic. For a useful discussion, it was necessary to prepare a uniform and sound modeling of these systems. This was done by adopting the "Fundamental Modeling Concepts (FMC)" technique. The created models as well as the comparison of the different approaches that can be used to solve typical integration problems form the main contribution of the thesis. <br><br> The integration of virtual machines into existing systems is frequently accompanied by the requirement to have the integrated virtual machine process several "programs" simultaneously. In view of the design features of many common virtual machines, the realization of a virtual machine integration that allows the integrated virtual machine to be operated in "multiprogram" mode is still challenging. The most challenging task in this context is the problem of keeping the resource usage of the system at a tolerable level. A comparison of measures that can be taken to reduce the resource usage of an integrated virtual machine that can be operated in "multiprogram" mode forms a second essential contribution of the thesis.
182

Exploiting parallelism of irregular problems and performance evaluation on heterogeneous multi-core architectures

Xu, Meilian 04 October 2012 (has links)
In this thesis, we design, develop and implement parallel algorithms for irregular problems on heterogeneous multi-core architectures. Irregular problems exhibit random and unpredictable memory access patterns, poor spatial locality and input dependent control flow. Heterogeneous multi-core processors vary in: clock frequency, power dissipation, programming model (MIMD vs. SIMD), memory design and computing units, scalar versus vector units. The heterogeneity of the processors makes designing efficient parallel algorithms for irregular problems on heterogeneous multicore processors challenging. Techniques of mapping tasks or data on traditional parallel computers can not be used as is on heterogeneous multi-core processors due to the varying hardware. In an attempt to understand the efficiency of futuristic heterogeneous multi-core architectures on applications we study several computation and bandwidth oriented irregular problems on one heterogeneous multi-core architecture, the IBM Cell Broadband Engine (Cell BE). The Cell BE consists of a general processor and eight specialized processors and addresses vector/data-level parallelism and instruction-level parallelism simultaneously. Through these studies on the Cell BE, we provide some discussions and insight on the performance of the applications on heterogeneous multi-core architectures. Verifying these experimental results require some performance modeling. Due to the diversity of heterogeneous multi-core architectures, theoretical performance models used for homogeneous multi-core architectures do not provide accurate results. Therefore, in this thesis we propose an analytical performance prediction model that considers the multitude architectural features of heterogeneous multi-cores (such as DMA transfers, number of instructions and operations, the processor frequency and DMA bandwidth). We show that the execution time from our prediction model is comparable to the execution time of the experimental results for a complex medical imaging application.
183

Simulation numérique directe d'écoulements à l'aide d'une méthode de frontière immergée

Noël, Emeline 19 November 2012 (has links) (PDF)
Les travaux menés, depuis plusieurs années, au CORIA ont abouti à la construction d'un outil numérique (ARCHER) permettant la simulation numérique directe d'écoulements diphasiques et notamment l'atomisation d'un jet liquide à haute vitesse. Ce type de simulation permet de capturer les phénomènes d'atomisation au voisinage de l'injecteur difficilement caractérisables par les outils expérimentaux actuels. Ces simulations requièrent des conditions d'injection délicates à évaluer a priori car elles dépendent des caractéristiques de l'écoulement au sein de l'injecteur. Or, certains jets présentent une grande sensibilité à ces conditions d'injection. Dès lors, il est nécessaire de simuler l'écoulement au sein de l'injecteur afin d'appréhender la nature de cette sensibilité. L'utilisation d'un maillage cartésien par le code ARCHER conjuguée à la volonté de simuler le système d'atomisation dans son ensemble ont orienté ces travaux vers l'utilisation d'une méthode de frontière immergée. Ces travaux ont ainsi permis de reproduire des écoulements au sein d'injecteurs de forme quelconque tout en conservant le maillage cartésien d'origine, précieux tant pour l'efficacité du solveur que pour sa précision. Dans un premier temps, l'implantation dans le code ARCHER d'une méthode de frontière immergée a été réalisée et testée sur des configurations de canal et de conduite et de l'écoulement autour d'un cylindre. L'application de cette méthode a porté sur la simulation de l'écoulement au sein d'un injecteur triple disque mono-trou et a notamment permis de caractériser l'origine de l'écoulement secondaire formé dans l'orifice de décharge. Afin d'évoluer vers la construction d'un outil numérique capable de simuler le système d'atomisation dans son ensemble, un couplage entre la méthode de frontière immergée et la méthode Ghost fluid a été nécessaire. La version bi-dimensionnelle développée a été testée sur la relaxation d'une goutte posée sur une paroi. Cette version a permis de simuler des écoulements au sein de canaux à différents rapports de longueur sur diamètre et l'écoulement au sein d'une buse convergente. La simulation simultanée de l'écoulement interne et externe a permis de lier les fluctuations de vitesses des écoulements internes à la création de surface engendrée sur les écoulements externes.
184

Exploiting parallelism of irregular problems and performance evaluation on heterogeneous multi-core architectures

Xu, Meilian 04 October 2012 (has links)
In this thesis, we design, develop and implement parallel algorithms for irregular problems on heterogeneous multi-core architectures. Irregular problems exhibit random and unpredictable memory access patterns, poor spatial locality and input dependent control flow. Heterogeneous multi-core processors vary in: clock frequency, power dissipation, programming model (MIMD vs. SIMD), memory design and computing units, scalar versus vector units. The heterogeneity of the processors makes designing efficient parallel algorithms for irregular problems on heterogeneous multicore processors challenging. Techniques of mapping tasks or data on traditional parallel computers can not be used as is on heterogeneous multi-core processors due to the varying hardware. In an attempt to understand the efficiency of futuristic heterogeneous multi-core architectures on applications we study several computation and bandwidth oriented irregular problems on one heterogeneous multi-core architecture, the IBM Cell Broadband Engine (Cell BE). The Cell BE consists of a general processor and eight specialized processors and addresses vector/data-level parallelism and instruction-level parallelism simultaneously. Through these studies on the Cell BE, we provide some discussions and insight on the performance of the applications on heterogeneous multi-core architectures. Verifying these experimental results require some performance modeling. Due to the diversity of heterogeneous multi-core architectures, theoretical performance models used for homogeneous multi-core architectures do not provide accurate results. Therefore, in this thesis we propose an analytical performance prediction model that considers the multitude architectural features of heterogeneous multi-cores (such as DMA transfers, number of instructions and operations, the processor frequency and DMA bandwidth). We show that the execution time from our prediction model is comparable to the execution time of the experimental results for a complex medical imaging application.
185

Gerência de produto: casos de sucesso no Brasil

Gioia, Ricardo Marcelo 03 June 1996 (has links)
Made available in DSpace on 2010-04-20T20:14:46Z (GMT). No. of bitstreams: 0 Previous issue date: 1996-06-03T00:00:00Z / O texto aborda o processo de gestão de produto em empresas produtoras de bens de consumo. Conceitos gerais de marketing são revistos, buscando-se sua integração com as estratégias competitivas apresentadas por Porter. Novas abordagens teóricas que preconizam a reengenharia de processos também são discutidas, com ênfase na sua necessidade e aplicabilidade. São apresentados, como ilustração, casos de produtos que obtiveram sucesso em seus mercados, no Brasil. / The text approaches the product management process, focusing on consumer goods. Marketing key concepts are reviewed and integrated to competitive strategies described by Michael Porter. New management issues, due to competitive pressures and economic globalization are. discussed too, like process reengineering and teamwork, emphasizing its business fitness and applicability. Cases of successful products in Brazil were presented.
186

Vývoj partnerských forem v České republice: trendy a kontexty / Development of partner forms in the Czech Republic: trends and patterns

Vyplel, Dan January 2018 (has links)
The objective of this study is to create comprehensive overview of the development of partner forms in the Czech republic from 1961 to 2016 and their own analysis. This thesis is divided into two parts, where the first part deals with analyzes of individual partner forms, namely in the form of analysis of primo-nuptiality, especially from generation perspective, analysis of divorce rate, analysis of marriages of divorced and analysis of cohabitation. This diploma thesis is so independently connected to my bachelor thesis, using the same primo-nuptiality life tables which had been calculated by a uniform methodology for absolute mutual comparability. These life tables, supplemented by another two years, were also used here to calculate the indicators in the already mentioned generational view of primo-nuptiality. The second part of this thesis is then devoted to the analysis of the International Social Survey Programme for the Czech Republic, focusing only on the part of the Family for 1994 and 2012 and their mutual comparison and transitions. Keywords: primo-nuptiality life tables, cohort, nuptial, marriage, divorce, cohabitation, ISSP, Czech Republic, IBM SPS
187

Développement d'une méthode de pénalisation pour la simulation d'écoulements liquide-bulles / A penalization method for the simulation of bubbly flows

Morente, Antoine 31 October 2017 (has links)
Ce travail est dédié au développement d'une méthode numérique pour la simulation des écoulements liquide-bulles. La présence des bulles dans l'écoulement visqueux et incompressible est prise en compte via une méthode de pénalisation. Dans cette représentation Euler-Lagrange, les bulles supposées indéformables et parfaitement sphériques sont assimilées à des objets pénalisés interagissant avec le fluide. Une méthode VOF (Volume Of Fluid) est employée pour le suivi de la fonction de phase. Une adaptation de la discrétisation des équations de Navier-Stokes est proposée afin d'imposer la condition de glissement à l'interface entre le liquide et les bulles. Une méthode de couplage entre le mouvement des bulles et l'action du liquide est proposée. La stratégie de validation est la suivante. Dans un premier temps, une série de cas-tests est proposée; les objets pénalisés sont supposés en non-interaction avec le fluide. L'étude permet d'exhiber la convergence et la précision de la méthode numérique. Dans un second temps le couplage est testé via deux types de configurations de validation. Le couplage est d'abord testé en configuration de bulle isolée, pour une bulle en ascension dans un liquide au repos pour les Reynolds Re=17 and Re=71. Les résultats sont comparés avec la théorie établie par la corrélation de Mei pour les bulles sphériques propres décrivant intégralement la dynamique de la bulle. Enfin, des simulations en configurations de nuage de bulles sont présentées, pour des populations mono- et bidisperses dans un domaine entièrement périodique pour des taux de vide s'établissant entre 1% et 15%. Les statistiques fournies par les simulations caractérisant l'agitation induite par les bulles sont comparées à des résultats expérimentaux. Pour les simulations de nuages de bulles bidisperses, de nouveaux résultats sont présentés. / This work is devoted to the development of a numerical method for the simulation of two-phase liquid-bubble flows. We use a volume penalization method to take into account bubbles in viscous incompressible flows. The chosen Euler-Lagrange framework involves spherical and nondeformable bubbles represented as moving penalized obstacles interacting with the fluid. A VOF (Volume Of Fluid) method is used to track the phase function while a discretization of the penalized conservation equations is realized to impose slip conditions at the liquid-bubble interface. A coupling method devised from the penalized momentum equations is proposed. The validation process is set as following. First, the fluid is supposed non-acting on the bubbles; several test-cases are presented; we consider configurations with different penalized obstacles shapes (curved channel, inclined channel), the obstacles are either static or dynamic; in each configuration an analytical solution is known. The results show the compliance and the quality of our numerical closures by exposing the convergence order of the method. In order to verify the accuracy of the coupling method, numerical simulations of a 1mm diameter single bubble rising in a quiescent liquid are performed for Re=17 and Re=71. Results are compared with theory established by using Mei correlation for clean spherical bubbles describing the whole dynamics of the rising bubble. Finally, simulations of bubble swarms, in mono- and bidisperse configurations have been carried out in a fully periodic box with moderate void fractions ranging from 1% to 15%. The statistics provided by the simulations characterizing the bubble-induced agitation are compared to experimental results. For the bidisperse bubble swarm configuration, new results are presented.
188

Sistema COPPE-FORTRAN: um compilador Fortran Residente para o computador IBM-1130

Salenbauch, Pedro 09 1900 (has links)
Submitted by Algacilda Conceição (algacilda@sibi.ufrj.br) on 2018-03-20T14:41:56Z No. of bitstreams: 1 130289.pdf: 2950159 bytes, checksum: 87f4f1586740edcb38c74bc241927da7 (MD5) / Made available in DSpace on 2018-03-20T14:41:56Z (GMT). No. of bitstreams: 1 130289.pdf: 2950159 bytes, checksum: 87f4f1586740edcb38c74bc241927da7 (MD5) Previous issue date: 1972-09 / É apresentado o problema da sobrecarga dos centros de computação de Universidades, causado pela quantidade enorme de novos usuários que surgiram com o ensino do Fortran aos alunos. O Sistema "COPPE-FORTRAN", um compilador Fortran residente para o computador IBM-1130 é apresentado como solução. Este sistema é descrito em seus vários aspectos, como os objetivos, componentes, técnicas de implementação e os resultados obtidos. / The overload of the universities' computing centers, due to the large number of new users that appeared with the Fortran teaching, is presented. The "COPPE-FORTRAN" System, a residente load and go Fortran compiler for the IBM-1130 computer is introduced as a solution. Various aspects of this system, as its objectives, components, implementation techniques and results are discussed.
189

Moderní podpora prodeje pomocí mobilních technologií / Modern sales promotion using mobile technologies

Žabka, Michael January 2013 (has links)
The diploma thesis deals to design and develop mobile application for sales promotion in retail chains. Mobile application is created on base of designed service for sales support, that subject and design is written in thesis too. Mobile application uses the most modern technologies, which are now available in mobile devices. This technologies ensuring identification of customer in store, share marketing information to customer and other possibilities gaining detailed information about shopping behavior of customer. Thanks to those data is possible analyze customer by different methods which are in thesis described too. Based on this analyses it can be streamlined sales, shopping and other retail processes. Main aim of thesis is make usable mobile application which promote sales in retail chain. Theoretical part of thesis deals to describe general marketing on which is based analytical marketing resp. Data-Driven Marketing. Next part of this chapters is defining of retail, explaining its specifics and showing interleave to modern technologies. Concrete possibilities of modern technologies is presented in last chapter of theoretical part which is primary focused on mobile application developing in IBM Worklight environment. Practical part of thesis is divided to two chapters where first chapter deals to description designing service for sales promotion. Description is built by architecture, data flows and design of communication interfaces. In second chapter is described design of mobile application based on the service, from user interface to technological architecture. In this part of thesis the mobile application is developed, provided as a OpenSource with all source codes and available online as a demo version. The main output of thesis is mentioned mobile application, which is detailed described in end of practical part. There is specified link to online available version of this application. Mobile application contains diverse functionality for customer and its aims to test usability of modern possibilities in real-life.
190

IBM Cognos Report Studio as an Effective Tool for Human Capital Reporting / IBM Cognos Report Studio jako efektivní nástroj reportingu v oblasti lidského kapitálu

Zinchenko, Yulia January 2013 (has links)
Main topic discussed in this diploma thesis is corporate reporting in terms of Human Capital using Business Intelligence tools, specifically IBM Cognos Report Studio. One of the objectives is to show step-by-step methodology of creating complex dynamic report, which includes data structure modeling, layout design and quality check. Another objective is to conduct Cost-Benefit Analysis for a real-life project, which is focused on recreating of Excel-based report in Cognos-based environment in order to automate information flows. Essential part of the diploma thesis is theoretical background of Business Intelligence aspects of data quality and visualization as well as purposes of human capital reporting and description of appropriate KPIs. Objectives are addressed by conducting analysis and research of resources related to topics described above as well as using IBM Cognos Report Studio provided by one of the major companies in financial advisory field. This diploma thesis represents relevant reading for those, who are interested in real-life application of data quality improvement and information flow automation using Business Intelligence reporting tools.

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