Telephony
Mostrando 13-24 de 73 artigos, teses e dissertações.
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13. Projeto de sistemas de comunicação microondas : rádio ponto a ponto
Hoje em dia as pessoas necessitam serviços de comunicação móveis, seguros e confiáveis. Quase todo mundo tem um telefone celular e não pode viver sem ele sem ter de reorganizar não só a vida profissional, mas também a pessoal. Neste mundo em que ninguém pode parar ou esperar para receber uma resposta, onde tudo tem de ser em tempo real, onde tempo
Publicado em: 2010
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14. Digital convergence in broadcasting TV, pay TV and telephony services : companies resources in competitive strategies / Convergência digital nos serviços de televisão e telefonia no Brasil : recursos empregados pelas empresas em suas estratégias competitivas
Esta tese busca analisar e entender como as empresas que prestam serviços de televisão (aberta e paga) e de telefonia (fixa e móvel) no Brasil estão utilizando os recursos por elas acumulados, bem como adquirindo novos recursos, tendo em vista tornarem-se competitivas na exploração de novos modelos de negócio possibilitados pelo fenômeno em curso da
Publicado em: 2010
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15. A responsabilidade socio-ambiental: legitimação por meio do relatório da administração das empresas de telecomunicações listadas na BOVESPA / Social-environmental responsibility: legitimacy by administration reporting of telephony companies related in BOVESPA
This research aimed to analyze the practices of corporate social and environmental responsibility identified in there administration reporting of the telecommunications companies listed on BOVESPA, published between 1998 and 2008, its trying to identify a strategy that involves the disclosure of such practices to the organizations legitimacy. To this gool, t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/12/2009
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16. Privatização e processo decisório
This article examines the political determinants of privatization of the fixed telephony sector in four countries, based on a neo-institutionalist approach. These countries faced similar pressures by telephone companies in favor of privatization, suggesting an apparent convergence in the sector's reorganization. However, although all four adopted some degree
Dados. Publicado em: 2009-06
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17. Gestão da satisfação e fidelidade do cliente : um estudo dos fatores que influenciam na satisfação e fidelidade dos clientes corporativos de telefonia celular / Management of customes satisfaction and loyalty: a study of factors influencing the satisfaction and loyalty to corporate customer of mobile service telephony
The competition in the telecommunications industry has grown in Brazil since the privatization, forcing companies that are active in the market to a growing commitment to quality products and services in order to survive. In this context, this work aims to understand the main factors that influence the degree of satisfaction exists in respect of a mobile ope
Publicado em: 2009
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18. Gateway de voz para integração IP-PSTN aderente à arquitetura das redes de nova geração / Gateway de Voz para Integração IP-PSTN Aderebte à Arquitetura das Redes de Nova Geração
The work presented validates the deployment of a voice gateway for integration between IP networks and the universe of public networks to traditional telephony. The differentiated nature of this Gateway is related to adherence to the functional architecture of next generation networks, through the use of libraries and open platforms, as well as the developme
Publicado em: 2009
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19. A separação de poderes e o processo de institucionalização das agências reguladoras de telecomunicações nos EUA e no Brasil
This dissertation analyses the way in which separation of powers and checks and balances have influenced the process of institutionalization of telecommunication regulation in the USA and in Brazil, leading to the creation of the American Federal Communications Commission (FCC) and the Brazilian Agência Nacional de Telecomunicações (Anatel). As the experi
Publicado em: 2009
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20. DISTRIBUTED RECOGNITION FOR CONTINUOUS SPEECH IN LARGE VOCABULARY BRAZILIAN PORTUGUESE / RECONHECIMENTO DISTRIBUÍDO DE VOZ CONTÍNUA COM AMPLO VOCABULÁRIO PARA O PORTUGUÊS BRASILEIRO
This Thesis aims at exploring several approaches for performance improvement of the Automatic Speech Recognition System with large vocabulary for the Brazilian Portuguese when applied in a distributed scenario (Distributed Speech Recognition). With this purpose, a speech database for continuous speech recognition for the Brazilian Portuguese with 100 speaker
Publicado em: 2009
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21. Analysis of non-ionizing radiation emitted by radiobase stations with losses evaluated by modelwalfisch Ikegami / Análise de radiação não-ionizante emitida por estações rádio-base com perdas calculadas pelo modelo de Ikegami-Walfisch
With the increase in the use of cellular telephony, an explosive growth in the number of radio-base stations installed in populated localities is observed. In this context, this work aims to show how the radio-base stations of cellular system spread its energy in the surrounding environment, and analyze the propagation of this energy, using computer simulati
Publicado em: 2009
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22. Compression of electromygraphic signals using adaptive predictive multi-rate codec / Compressão de sinais eletromiográficos usando codificador multitaxa preditivo adaptativo
The development of highly efficient speech codecs has raised the interest in their use in other types of signal, such as electrophysiological ones. This study evaluates the AMRACELP codec, developed for third generation mobile telephony, and proposes changes to improve its performance in compression of electromyographical signals, considering the objective q
Publicado em: 2009
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23. A Influência da Regulamentação na Formação do Mercado de Telecom no Brasil.
In the late two decades, the telecommunications sector passed through great transformations. On the one hand, the advent of the microelectronics base has provoked a technological revolution in the telecommunications industry, which resulted in new services, new transmission and switching equipment and the convergence with others segments of the electronic co
Publicado em: 2009
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24. IPTV architecture with time-shift support based on peer-to-peer distribution. / Arquitetura de IPTV com suporte à apresentação deslocada no tempo baseada em distribuição peer-to-peer.
Telecommunication companies are suffering from the increasing offer of cheap and reliable voice over IP services, being forced to diversify their services looking for new revenue possibilities. Since these companies have a vast infrastructure, they are now providing TV services through the same telephony and data infrastructure, using their IP networks to of
Publicado em: 2009