Typically a wireless LAN infrastructure is designed and installed by Networking professionals. These individuals are extremely familiar with wired networks, but are often unfamiliar with wireless networks. Thus, Wireless LAN installations are currently handicapped by the lack of an accurate, performance prediction model that is intuitive for use by non-wireless professionals. To provide a solution to this problem, this thesis presents a method of predicting the expected wireless LAN throughput using a site-specific model of an indoor environment. In order to develop this throughput prediction model, two wireless LAN throughput measurement products, LANFielder and SiteSpy, were created. These two products, which are patent pending, allow site-specific network performance measurements to be made. These two software packages were used to conduct an extensive measurement campaign to evaluate the performance of two IEEE 802.11b access points (APs) under ideal, multiuser, and interference scenarios. The data from this measurement campaign was then used to create empirically based throughput prediction models. The resulting models were first developed using RSSI measurements and then confirmed using predicted signal strength parameters. / Master of Science

A wireless local area network (LAN) system is proposed to provide mobility for existing data communication services. This thesis presents a physical layer design for a direct sequence spread spectrum ISM band radio LAN system. This radio system employs spread spectrum communication technology and a differential binary phase shift keying/quadrature phase shift keying (BPSK/QPSK) non-coherent receiver to overcome the adverse indoor wireless environment. Moreover, a variable data rate transmission technique is used to dynamically configure the spread spectrum system according to channel performance. This physical layer incorporates the Zilog Z2000 Evaluation Board performing direct sequence spread spectrum processing, a Grayson 900 MHz radio receiver and a transmitter module which was designed and built at Virginia Tech. The transmitted spectrum occupies a 4 MHz bandwidth in the 900 MHz ISM band and this system supports a data rate of up to 363 Kbits/sec. The spread spectrum system design along with detailed descriptions of hardware and control software development are presented. / Master of Science

[pt] O trabalho visa a especificação e implementação de um servidor de arquivos de voz em tempo real, compatível com arquiteturas de rede local. Visou-se também desenvolver um protótipo, em C, para ambiente OS/ 2 combinado com LAN MANAGER, sobre uma plataforma constituída de microcomputadores tipo PC, baseados em processadores INTEL 286 e 386. O servidor permite a centralização de arquivos de voz, tornando possível que vários programas em execução na rede local compartilhem desses arquivos. O trabalho faz parte do projeto LANBRETAS. / [en] This work aims at the specification and implementation of a real-time voice file server, compartible with local area network architectures. A complementary objective was to develop a prototype, in C, for OS/ 2 – LAN MANAGER, running on a platform consisting of PC-type microcomputers, based on INTEL 286 and 386 processors. The server permits the centralization of voice files, allowing several programs executing on a local area network to share these files. The work is part of the LANBRETAS project.

ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California / The Central Test and Evaluation Investment Program (CTEIP) Integrated Network Enhanced Telemetry (iNET) program is currently testing a wireless local area networking (WLAN) in an L-band telemetry (TM) channel to evaluate the feasibility and capabilities of enhancing traditional TM methods in a seamless wide area network (WAN). Several advantages of networking are real-time command and control of instrumentation formats, quick-look acquisition, data retransmission and recovery (gapless TM) and test point real-time verification. These networking functions, and all others, need to be tested and evaluated. The iNET team is developing a WLAN based on 802.x technologies to test the feasibility of the enhanced telemetry implementation for flight testing.

Made available in DSpace on 2016-07-27T13:52:30Z (GMT). No. of bitstreams: 1 LYANDRA DE AZEVEDO PEREIRA.pdf: 559099 bytes, checksum: 3ba3059ae54769b09a07fb0cf5a5546c (MD5) Previous issue date: 2010-09-28 / This study was conducted within the research line Theories and Processes of Education, Educational Program Graduate Education at the Pontifical Catholic University of Goias. The objective of this thesis was to investigate the digital culture of young people, identifying the educational aspects of their forms of appropriation of the Internet outside school. The starting point is the concerning about the preconceived idea that the uses which young people make of the Internet outside school are sufficient to prepare them for use demanded by the school. The study of the cultural issue, of school culture and digital culture took as a reference the contributions of Belloni (2008), Bourdieu (1998, 1999), Fourquin (1993), Peixoto (2008, 2009, 2010), among others. To investigate the relationships between technologies and the social, cultural and educational processes, we rely especially on the debate of Buckingham (2000), Castells (1999), Kenski (2007), Sacristán (2007), Sancho, Hernandez (2006) and Santaella (2004). The qualitative type of research consists in the observation of young people using the internet in lan-house situated in the eastern part of the city of Goiania. To accommodate the research objectives, we adopted the daily observation as a tool for data collection. The discussion and analysis of the results led us to identify four types of use that can be taken as evidence to characterize the forms of Internet use by young people in lanhouse: 1) use of diverse forms, 2) communication limited to the social group, 3) Virtual Communications in a complementary (not substitutive) to the presential communication process, 4) Setting up a player marked by the electronic media. / Este estudo foi realizado dentro da linha de pesquisa Teorias da Educação e Processos Educacionais, do Programa de Pós-Graduação em Educação da Pontifícia Universidade Católica de Goiás. O objetivo desta dissertação foi investigar a cultura digital dos jovens, visando identificar os aspectos educativos de suas formas de apropriação da internet fora do contexto escolar. O ponto de partida é a preocupação com a idéia preconcebida de que os usos que os jovens fazem da internet fora do contexto escolar são suficientes para prepará-los para o uso demandado pela escola. O estudo da questão cultural, da cultura escolar e da cultura digital tomou como referência as contribuições de Belloni (2008), Bourdieu (1998, 1999), Fourquin (1993), Peixoto (2008, 2009, 2010), dentre outros. Para a investigação das relações entre as tecnologias e os processos sociais, culturais e educativos, apoiamo-nos especialmente nas reflexões de Buckingham (2000), Castells (1999), Kenski (2007), Sacristán (2007), Sancho e Hernandez (2006) e Santaella (2004). A pesquisa de tipo qualitativa consistiu na observação de jovens utilizando a internet em lan-house situadas na região leste do município de Goiânia. Para contemplar os objetivos da pesquisa, foi adotado o diário de observação como instrumento para a coleta de dados. A discussão e análise dos resultados levaramnos a identificar quatro modalidades de uso que podem ser tomadas como elementos para caracterizar as formas de uso da internet pelos jovens em lanhouse: 1) Formas diversificadas de uso; 2) Comunicação limitada ao grupo social de convivência; 3) Comunicação virtual de forma complementar (e não substitutiva) ao processo de comunicação presencial; 4) A configuração de um leitor marcado pelos meios de comunicação eletrônicos.

Cette étude, conçue comme un état des lieux des peintures murales dans les monastères de six districts de la province de Chiang Mai, a permis d’une part d’étudier les différents acteurs de la commande artistique [commanditaires, donateurs, artistes] et d’autre part de définir ces peintures en quatre groupes selon une classification à la fois chronologique et stylistique. Les multiples facteurs susceptibles d’influencer la présence ou l’absence de peintures dans les temples ont été également examinés. Une comparaison de l’iconographie présentée dans ces temples entre les quatre groupes retrouvés a été également entreprise afin d’affiner les caractéristiques de ces derniers. En parallèle, une attention toute particulière a été portée aux artistes travaillant dans les temples afin de mieux connaître ces individus méconnus et ignorés. Formations, milieux sociaux, place de la femme artiste, inspirations et influences, autant de thèmes évoqués au sein de cette étude. / This study, designed as an inventory of murals in the monasteries of six districts of the province of Chiang Mai made it possible on the one hand to study the various actors involved in an art order [sponsors, donors, artists] and on the other hand to classify these paintings into four groups according to their chronological and stylistic description. The multiple factors likely to influence the presence or the absence of paintings in the temples were also examined. A comparison of the iconography between the four groups found in these temples was also undertaken in order to refine their characteristics. In parallel, special attention was paid to the artists working in the temples in order to learn more about these unsung and ignored individuals. Training, social environments, place of the woman artist, inspirations and influences are topics discussed in this study.

Made available in DSpace on 2016-04-28T20:39:15Z (GMT). No. of bitstreams: 1 Tese Claudia Guimaraes Goncalves Freitas Stress em Jogadores de Lan House Maio2006.pdf: 451590 bytes, checksum: 2a98ee7f5caa65dd596c18b993c02560 (MD5) Previous issue date: 2006-05-24 / This dissertation intends to analyze the stress in players from the prolonged use of the network games in LAN HOUSES. It dedicated to trace a revision of the literature about this subject, noticing the bibliographical shortage in relation of the studied object, as well as the references that give support to the concept of Pathological Game. This concept, in general related with the bet among pathological players to define the loss, was enlarged here. The psychosomatic loss transposes the limits that relate it directly with the act of the bet, to detain more specifically in the obstinate and immoderate use of the pleasure object--use that can take Lan House player to suffer himself, in certain measure, the effects of one pathology, such as loss of the time of notion, of the social responsibilities, of their own physiological till financial limits. The objective proposed was to evaluate if the excessive use of the games in Lan Houses can take the player to such losses. For such evaluation, this research adopted the quantitative method by interviewing the visitors of a Lan House, as well as the application of stress tests ESST/VAS and CASIFS/VAS respectively, besides the characterization of the physical space where the network games happen. The evaluation of the results of this study ransomed that the game is before all, a method of socialization by excellence, constituted of the human development and can contain in its unfolded aspects that can promote pathologies resulted from its interaction with the human and the environment it is inserted in / Esta dissertação buscou analisar o stress em jogadores a partir do uso prolongado dos jogos em rede nas Lan Houses. Dedicou-se a traçar uma revisão da literatura sobre o assunto, percebendo a escassez bibliográfica em relação ao objeto estudado, bem como das referências que dão suporte ao conceito de jogo patológico. Este conceito, em geral relacionado com a aposta em dinheiro entre os jogadores, para caracterizar a perda, foi aqui ampliado. O dano psicossomático transpõe os limites que o relacionam diretamente ao ato da aposta, para se deter mais especificamente no uso contínuo e imoderado do objeto de prazer -- uso este que pode levar o jogador da Lan House a sofrer, ele também, em certa medida, os efeitos de uma patologia, tais como perda da noção de tempo, das responsabilidades sociais, dos seus próprios limites fisiológicos e até financeiros. O objetivo proposto foi avaliar se o uso excessivo dos jogos em Lan Houses pode levar a esses danos. Para tanto, esta pesquisa adotou o método quantitativo, com entrevista aos freqüentadores de uma Lan House, bem como a aplicação de testes de stress ESST/VAS e CASIFS/VAS respectivamente, além da caracterização do espaço físico onde acontecem os jogos em rede. A análise dos resultados deste estudo resgatou que o jogo é antes de tudo, um método de socialização por excelência, constitutivo do desenvolvimento do humano e pode conter em seus desdobramentos aspectos patologizantes, resultantes de sua interação com o homem e o meio no qual está inserido

published_or_final_version / Architecture / Master / Master of Architecture

published_or_final_version / Architecture / Master / Master of Architecture

Made available in DSpace on 2016-12-08T16:35:11Z (GMT). No. of bitstreams: 1 PATRICIA.pdf: 2893625 bytes, checksum: 9662d7a39df05d29f77e5be36dfde695 (MD5) Previous issue date: 2010-03-02 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / In this research we look at how you present sociality among young people in Internet cafes and Internet in Florianópolis - SC. To perform such an observation at an Internet café in the capital of Santa Catarina to know a little everyday this trade. We also apply a questionnaire to young students about the use of digital technologies and conducted semi-structured interviews with young people to deepen some questions regarding the use of Internet cafes and the Internet. Emphasize that sociality is present in these environments through the will to be together sharing common interests in interpersonal communicative actions, creating an identification between the users of cyberspace. Emphasize that public schools can play a critical role with respect to digital education based on youthful experiences related to the use of cyberspace. Finally, we suggest that the computer room of the school is also a place to use self-directed and 'free' digital technologies, fostering interaction between the experiences of Internet cafes and school. What can be called LanEscola / Nesta pesquisa buscamos analisar como se apresenta a socialidade entre jovens em lan houses e suas implicações para a escola. Para tal realizamos uma observação em uma lan house na capital catarinense a fim de conhecer um pouco do cotidiano deste tipo de comércio, aplicamos um questionário com jovens estudantes a respeito do uso das tecnologias digitais e realizamos entrevistas semi-estruturadas com alguns jovens para aprofundarmos questões atinentes ao uso das lan houses e da Internet. Destacamos que a socialidade está presente nestes ambientes através da vontade de estar junto compartilhando interesses em comum, nas ações comunicativas interpessoais, criando uma identificação entre os usuários do ciberespaço. Ressaltamos que a escola pública pode ter papel fundamental no que tange a educação digital com base nas experiências juvenis relacionadas ao uso do ciberespaço. Por fim, sugerimos que a sala de informática da escola seja também um local voltado ao uso autônomo e livre das tecnologias digitais, promovendo uma interação entre as vivências das lan houses e da escola, o qual pode ser chamado de LanEscola