Cell Phone
Mostrando 37-48 de 57 artigos, teses e dissertações.
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37. Reducing the rate of fall call GSM mobile network by means of adjustment of parameters of coverage / Redução da taxa de queda de chamada em rede celular GSM por meio de ajustes dos parâmetros de cobertura
A study about the main causes of dropped calls in mobile network cell GSM is made by means of statistical traffic analysis. The aim is to minimize the effect of these causes through coverage parameters changes, such as dynamical potency control, coverage border between cells, correct definition of neighboring cells. The reduction of dropped call rate by mean
Publicado em: 2008
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38. Identity-based cryptography environment. / Um ambiente criptográfico baseado na identidade.
The accelerated growth of Internet-based business increase significantly the need for mechanisms that can guarantee the data confidentiality, providing tools for authenticity and non-repudiation users in any medium of communication, even with computer resources becoming increasingly scarce, eg into a cell phone. This paper describes an encryption scheme that
Publicado em: 2008
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39. MÃtodos justos de alocaÃÃo dinÃmica de recursos em sistemas de transmissÃo baseados em OFDM com modulaÃÃo adaptativa
The growth of the telecommunications systems utilization and the introduction of the Third Generation Cell-Phone technologies motivate the industry to search for new alternatives to manage the traditional radio infrastructure, allowing so the offering of new business models and applications. In order to satisfactorily supply the demand generated this growth,
Publicado em: 2008
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40. Consumo de telefone celular: significados e influências na vida cotidiana dos adolescentes / Consumption of cell phone: meanings and influences in the adolescents daily life.
Neste trabalho, objetivou-se analisar o comportamento de consumo de telefone celular entre os adolescentes estudantes, com idade entre 12 a 17 anos, da cidade de Viçosa, bem como os significados desse produto na vida cotidiana destes e os impactos desse tipo de consumo nas relações familiares, extrafamiliares e no orçamento familiar. O estudo foi realiza
Publicado em: 2008
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41. THE PROFESSIONAL USAGE OF THE CELL PHONE: HOW ARE PEOPLE´S LIFE AND WORK AFTER THE ARRIVAL OF THIS TECHNOLOGY? / O USO PROFISSIONAL DO TELEFONE CELULAR: COMO ESTÃO A VIDA E O TRABALHO APÓS A CHEGADA DESSA NOVA TECNOLOGIA?
Technological revolutions have brought about dramatic changes in the world and in the ways people live, think, behave and feel. The purpose of the present study is to understand how the arrival of cell phones has affected the ways employees in the contemporary labor market live their private and professional lives. For this purpose, professionals who have ch
Publicado em: 2007
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42. A Comunicação Mediada por Interfaces Digitais: a interação humana com os jogos digitais em celulares.
This work is an exploratory study on entertainment messages processing. The objective of this work was to test a model of message processing dedicated to understand digital games. In order to accomplish the objective an extensive research on the observational techniques was conducted in order to analyze the final users reaction upon software and different ki
Publicado em: 2007
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43. EstratÃgias de estudo deliberado e percepÃÃes sobre o ensino de matemÃtica em contexto universitÃrio
This research aimed to investigate, among mathematics graduates, deliberate study strategies and perceptions about teaching and learning in terms of metacognition and self-regulation. The guideline questions for this research were the following: (i) identify studentsâ perceptions about the teaching context in Math degree concerning the environment, the syll
Publicado em: 2007
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44. Desenvolvimento Symbian na plataforma serie 60 / Development Symbian in serie 60 platform
The fast development of the cell phones and the integration of features of handhelds in them created new opportunities for mobile applications. The main development languages are: Symbian C++ BREW Java 2 Micro Edition The main focus in this work is the development cycle of Symbian C++ applied to location based services. The first step is to understand the or
Publicado em: 2006
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45. UMA PROPOSTA PARA RENDERING BASEADO EM IMAGENS EM CELULARES / A PROPOSAL FOR IMAGE BASED RENDERING IN CELL PHONES
Rendering Baseado em Imagens (IBR - Image-Based Rendering) é um a tendência forte em visualização devido à alta qualidade da imagem. Um dos problemas mais complexos é a composição de objetos (3D ou não) na imagem do panorama. O uso de IBR em plataformas restritas, como os celulares, encontra inúmeras dificuldades e não conta com muitos trabalhos n
Publicado em: 2006
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46. Duble forward converter with two main and auxiliary switches and soft switching / Conversor duplo Forward PWM a duas chaves principais e duas chaves auxiliares com comutação suave
Converting a constant voltage in another constant voltage is necessary in many technological applications, starting from charging a cell phone battery to feed a DC motor in industrial plants. This work presents one more way to convert a Constant voltage based on a new circuit topology. This topology has its embryo in the simplest step-down configuration, the
Publicado em: 2006
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47. Duble forward converter with two main and auxiliary switches and soft switching / Conversor duplo Forward PWM a duas chaves principais e duas chaves auxiliares com comutaÃÃo suave
Converting a constant voltage in another constant voltage is necessary in many technological applications, starting from charging a cell phone battery to feed a DC motor in industrial plants. This work presents one more way to convert a Constant voltage based on a new circuit topology. This topology has its embryo in the simplest step-down configuration, the
Publicado em: 2006
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48. ANÁLISE DE TRANSMISSÃO DE VOZ EM MODO PACOTE NAS REDES CELULARES EGPRS / ANALYSIS OF THE VOICE TRANSMISSION ON PACKET MODE OVER EGPRS NETWORKS
Atualmente, há uma demanda crescente por serviços que exploram a integração entre as tradicionais redes de pacotes (como a Internet) e as redes celulares de última geração. Além das aplicações que visam ao transporte de dados em si, há linhas de pesquisa no sentido de oferecer serviços de voz sobre IP em redes celulares, ou seja, explorando o par
Publicado em: 2006