Orientador: Orlando Lee / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Computação / Made available in DSpace on 2018-08-16T05:20:45Z (GMT). No. of bitstreams: 1 SanFelice_MarioCesar_M.pdf: 1592906 bytes, checksum: 7d6d43104cbdeb2ad46a93e6ef11ae23 (MD5) Previous issue date: 2010 / Resumo: Nesta dissertação consideramos o problema do k-Servidor. Neste problema temos k servidores em um espaço métrico e nosso objetivo e atender a uma seqüência de requisições, de modo a minimizar a distancia total percorrida pelos servidores. Dedicamos especial atenção a conjectura do k-Servidor: qualquer espaço métrico admite um algoritmo k-competitivo para o problema do k-Servidor. Este e um dos problemas mais importantes em aberto da area de computação online. O algoritmo da função trabalho, proposto por Chrobak e Larmore, e especialmente relevante para a conjectura. Isto porque foi provado que este algoritmo e k-competitivo para diversos casos particulares do problema do k-Servidor. Alem disso, acredita-se que este algoritmo e de fato k-competitivo para todo espaço métrico. Por isto, o entendimento deste algoritmo e central neste trabalho. Para analisar o algoritmo da função trabalho são utilizados diversos resultados auxiliares desenvolvidos por vários autores. Neste trabalho tentamos apresentar de forma coesa uma coletânea destes resultados. A partir desta mostramos uma prova do teorema de Koutsoupias e Papadimitriou: o algoritmo da função trabalho e (2k - 1)-competitivo para todo espaço métrico. Este e o resultado mais importante relacionado ao problema do k-Servidor. Alem disso, mostramos que a conjectura do k-Servidor vale para alguns casos particulares do problema / Abstract: In this work we study the k-server problem. In this problem, we have k servers on a metric space that must attend a sequence of requests with the goal of minimizing the total distance moved by the servers. We dedicate special attention to the k-server conjecture: any metric space allows for a k-competitive k-server algorithm. This is one of the most important open problems in online computing. The work function algorithm, proposed by Chrobak and Larmore, is very relevant to the conjecture. It has been proved that this algorithm is k-competitive for several special cases of the k-server problem. Furthermore, most researchers believe that the algorithm is indeed k-competitive for any metric space. Thus, a deeper understanding of this algorithm plays a special role in this work. To analyze the work function algorithm, we use many auxiliary results developed by several authors. In this work we tried to present a collection of these results in a concise way. From this, we present a proof of Koutsoupias and Papadimitriou's theorem: the work function algorithm is (2k - 1)-competitive for any metric space. This is the most important result related to the k-server problem. Moreover, we show that the k-server conjecture holds in some special cases / Mestrado / Otimização Combinatoria / Mestre em Ciência da Computação

Submitted by Marcela Carvalho (marcelaalfaia@hotmail.com) on 2016-08-19T15:17:48Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação - Rizelda de Souza Ribeiro.pdf: 1195307 bytes, checksum: b265889fb628d3798b69d3dad49d6eb8 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-08-22T13:02:12Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação - Rizelda de Souza Ribeiro.pdf: 1195307 bytes, checksum: b265889fb628d3798b69d3dad49d6eb8 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-08-22T13:05:28Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação - Rizelda de Souza Ribeiro.pdf: 1195307 bytes, checksum: b265889fb628d3798b69d3dad49d6eb8 (MD5) / Made available in DSpace on 2016-08-22T13:05:28Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertação - Rizelda de Souza Ribeiro.pdf: 1195307 bytes, checksum: b265889fb628d3798b69d3dad49d6eb8 (MD5) Previous issue date: 2016-05-13 / With so much access to information, the concerns of the managers take a new focus: enable, retain and sustain the highest number of possible intellectual capital. In this regard, the State must go through a period of adaptation, adopt a new design management to prepare the technical and administrative and managerial staff to carry out their responsibilities. It is known that the training process for civil servants allows the development of managerial skills and effective change in the server profile, so the overall objective of this work is to evaluate the effectiveness of top-level training in the formation of organizational skills civil servants in the period 2010 to 2014. for this highlights three specific objectives: (1) identify the areas of knowledge, responsible for developing the skills of the public servant; (2) catalog the world of higher education courses offered by the program; and (3) raise the awareness of public servants before the grants awarded this same period cited. The methodology used was an exploratory and descriptive case study with application of the questionnaire survey method, characterized nature applied in a circumstantial reality is the inductive method from the observation of a particular universe of the sample to represent the whole. Data validation was made through statistical analysis using the Chi-square Person. The results were consistent and evaluating the effectiveness of the process was confirmed as being a tool for the development of knowledge, skills and managerial attitudes, but it was concluded that despite the satisfactory results in most indicators, there is the possibility to insert process improvements, particularly regarding the intensification of performance evaluation program in time to correct any possible failures in performing the tasks / Com tanto acesso à informação, a preocupação dos gestores toma um novo foco: viabilizar, reter e sustentar o maior número de capital intelectual possível. Nesse sentido, o Estado deve passar por um momento de adaptação, adotar uma nova concepção de gestão que prepare o pessoal técnico-administrativo e gerencial para o exercício de suas responsabilidades. Sabe-se que o processo de capacitação dos servidores públicos permite o desenvolvimento de competências gerenciais e a mudança efetiva no perfil do servidor, por isso, o objetivo geral desta dissertação é o de avaliação da capacitação de nível superior na formação das competências organizacionais dos servidores públicos no período de 2010 a 2014. Para isso destacam-se três objetivos específicos: (1) identificar as áreas do conhecimento, responsáveis pelo desenvolvimento das competências do agente público; (2) catalogar o universo dos cursos de nível superior oferecidos pelo programa; e, (3) levantar a percepção dos servidores públicos ante as bolsas concedidas neste mesmo período citado. A metodologia utilizada foi um estudo de caso exploratório e descritivo com aplicação de questionário pelo método survey, caracteriza-se de natureza aplicada em uma realidade circunstancial sendo do método indutivo por partir da observação de um universo particular da amostra para que representasse o todo. A validação dos dados se deu através de tratamento estatístico com a utilização do Teste Qui-Quadrado de Person. Os resultados foram coerentes e a avaliação do processo de capacitação dos servidores de nível superior confirmou-se como sendo uma ferramenta que permite o desenvolvimento de conhecimentos, habilidades e atitudes gerenciais, mas, concluiu-se que apesar dos resultados satisfatórios na maioria dos indicadores, há a possibilidade de inserir melhorias no processo, principalmente quanto à intensificação do programa de avaliação de desempenho a tempo de corrigir possíveis falhas na execução das tarefas.

Supercomputer in Betrieb Chemnitzer Studentennetz eingeweiht Neue Compute-Server Neuer Dienst: PC-Integration TeX -Service des URZ Software-News Advent, Advent - Geschichtenzeit

Das Campusnetz - neue Strukturen und Funktionen Neues vom WWW-Server Umstellung der HOME-Verzeichnisse vom NFS ins AFS AFS löst NFS ab! Neue Rechnersysteme - zur allgemeinen Nutzung Superskalarrechner - Inbetriebnahme und Nutzungsmöglichkeiten PC-Integration via SAMBA-Server CD-ROM im Netz Die Programmpakete MATHEMATICA und ANSYS Ueberblick ueber /uni/global-Software Ein weihnachtliches Problem?

Linux auf dem Vormarsch KDE unter Linux in den PC-Pools Womit schreibt man denn nun Studien- oder Diplomarbeiten? (Textsatz-Software im Campusnetz) Windows 98 - Umstieg erforderlich? Neues vom WWW-Server Serveranbindung via Level-4 Switch Webzugriffe ermitteln Maximale Größe und Zustellzeit einer E-Mail

Informationen des Universitätsrechenzentrums

Distributed Denial of Service attacks are an ever prevalent challenge for system administra-tors today to overcome. The attack, which is all about restricting legitimate users access to a service, such as a web-page. Can cost companies and governments millions of dollars if not properly managed. This study aims to explore if there is any difference in performance between some of the most modern iterations of popular server operating systems today. Those server operating systems are: Windows Server 2016, Ubuntu 16 and FreeBSD 11. And submitting them to one of the most popular DDoS attacks at the time of writing, a so called HTTP-Get request. The webservers used are some of the most widely used today, Apache and Microsoft IIS. Each server will be submitted to attacks, and compared between one another. Different de-fence methods will also be tested and examined. Tests include shorter tests that is repeated multiple times for data validity, and one longer test for every condition in order to control if the results are similar. During these tests, the operating systems will measure CPU/RAM utilization, and a control computer will measure Round Trip Time. Windows Server 2016 using IIS and FreeBSD 11 perform similarly resource wise, but Win-dows Server 2016 with IIS had a better Round Trip Time performance. Windows Server 2016 with Apache performs worst in all measurements, while Ubuntu 16 performs in the middle, but has the most stable performance.

Konsultbolag har behov av att kunna kommunicera sina konsulters kompetenser. Viktigt i dettaarbete blir konsultprofilsdokument som på ett enkelt och effektivt sätt ska kunna marknadsförabolaget. Målet med detta examensarbete var att skapa ett system för att effektivisera ochunderlätta hanteringen av konsultprofilsdokument för konsultbolaget 27M.Kravinsamling och behovsanalys genomfördes genom intervjuer samt en designworkshop medpersonal från bolaget. Ett webbaserat prototypsystem utvecklades från grunden i Python,HTML, CSS, Javascript med en MySQL databas. Systemet hanterar en mängd fördefinieradekonsultmallar och gör det möjligt att förändra dokumentens layout. Arbetet demonstrerar attdet är möjligt att skapa ett system för att hantera konsultprofiler.

Next generation heterogeneous wireless networks are expected to interwork with Internet Protocol (IP)-based infrastructures. Conventional network services operate like silos in that a specific set of services are offered over a specific type of access network. As access networks evolve to provide IP-based packet access, it becomes attractive to break these “service silos” by offering a converged set of IP-based services to users who may access these services using a number of alternative access networks. This trend has started with third generation cellular mobile networks, which have standardized on the use of the IP Multimedia Subsystem (IMS) to manage user access to a wide variety of multimedia services over the mobile Internet, while facilitating interworking of heterogeneous wireless and landline access networks. The future users of communication systems will subscribe to both IP-based and Circuit Switched (CS) based services and in the foreseeable future a single database that handles user profiles across all domains will be required. Home Subscriber Server (HSS) as an evolved version of Home Location Register (HLR) is one of the key components of IMS. In deploying HSS as a central repository database, in a fully overlapped heterogeneous network setting, changes of access mode are very frequent and conveying this information to HSS imposes excessive signaling load and delay. In our proposed scheme we introduce an Interface Agent (IA) for each location area that caches the location and information about the access mode through which a user can be reached. This method results in significant amount of savings in signaling cost and better delay performance. The existing call delivery approaches in cellular networks may not be well suited for future communication systems because they suffer from unnecessary usage of network resources for call attempts that may fail which adds to excessive signaling delays and queuing costs. Reducing the number of queries and retrievals from the database will have a significant impact on the network performance. We present a new scheme based on Reverse Virtual Call setup (RVC) as a solution to the call delivery problem in heterogeneous wireless networks and evaluate the performance of this framework. / Applied Science, Faculty of / Electrical and Computer Engineering, Department of / Graduate

Report writers (sv rapporteringsverktyg) används för att skapa och hantera databasbaserade rapporter. Detta examensarbete handlar om Reporting Services, ett helt nytt rapporteringsverktyg från Microsoft. Syftet med examensarbetet var att utvärdera Reporting Services för att se vad verktyget har att erbjuda i förhållande till rapporteringsverktyg från andra tillverkare. En jämförelse mellan Reporting Services och rapporteringsverktyg från tre andra betydande tillverkare har gjorts. En djupare utvärdering av Reporting Services, där arkitektur, funktionalitet och andra egenskaper gåtts igenom grundligt, har också genomförts. Arbetet har visat att problemet att jämföra olika rapporteringsverktyg med varandra är ganska komplext och att olika verktyg lämpar sig olika bra i olika situationer och kontexter. Verktygens arkitektur skiljer sig åt och de erbjuder olika funktionalitet. Arbetet har också visat att Reporting Services definitivt är ett bra alternativ för företag som använder SQL Server, inte minst ur ekonomisk synvinkel. Verktyget ger användarna en god kontroll över utformningen av rapporter, det är lätt att exportera rapporter till olika format och det finns flera bra möjligheter att distribuera rapporter till läsare.