High Speed Networks
Mostrando 13-24 de 31 artigos, teses e dissertações.
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13. Design of high-speed networks considering monofractal and multifractal traffic models.
Fractal traffic models capture uniquely statistical scaling characteristics and the burstiness of the real network traffic. The impact of such traffic models on existing networks has been studied extensively in the related literature and the relevance of such analysis to dimension the necessary resources and evaluate correctly the performance of these system
Publicado em: 2007
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14. AvaliaÃÃo da Qualidade de Voz do ServiÃo VoIP em Sistemas HSDPA / Evaluation of the quality of voice of the VoIP service in systems HDSPA
In recent years, we can observe the development and fast dissemination of VoIP services, being integrated by the present market, beside conventional telephony and cellular networks. For being a technological alternative that contributes to minimize costs, we see an increasing preference for voice transmission through IP networks. HSDPA, as a cellular system,
Publicado em: 2007
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15. Alocação de banda passante em redes auto-ajustaveis / Bandwidth allocation in self-sizing networks
Nesta dissertação, apresenta-se o framework de Redes Auto-Ajustáveis, como sendo um conjunto de técnicas capazes de prover Qualidade de Serviço (QoS), em redes multiserviço de alta velocidade. A implantação deste framework permitirá a introdução de novas aplicações multimídia com Qualidade de Serviço, nas redes backbone existentes. Para se gar
Publicado em: 2005
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16. Comunicação e sociabilidade comunitária:no ritmo dos fotologs
This dissertation has as main goal the comprehension of contemporary sociability, how it presents itself and which are the influences of the communication technologies in the social environments through the Internet, especially in photologs. Starting from the concept of contemporary sociability, strutctured in networks, it is hightlighted by the tension betw
Publicado em: 2005
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17. Um cripto-processador reconfiguravel baseado em algoritmos de curvas elipticas e AES
Information Security is a key factor for de development ofmodern society. Every day, massive amounts of data flow through high speed networks without proper cryptographic security support. Cryptography services belong to the computational infTastructure and as such they are migrating into computer s hardware. In this context, the design of a parameterized cr
Publicado em: 2004
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18. Modeling and computing of equivalent bandwidth of multifractal flows / Modelagem e computação de banda passante equivalente de fluxos multifractais
Scaling in network traffic can be identified as the absence of a typical time scale at which traffic burstiness can be characterized. Internet Protocol (IP) traffic presents both scaling and long-range dependence. Moreover, at small time scales, IP traffic shows non-uniform scaling and high variability. Moreover, the marginal distribution of counting process
Publicado em: 2004
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19. Self-similar LAN/WAN traffic issues on high-speed QoS networks.
During the last decade, the enormous commercial explosion of the Internet has brought up the exhaustive use of Public Telephone Switched Network (PTSN) communication lines by computers (end-users) from all over the world. As a direct consequence of this explosion, a brand new research field, inside the context of the so-called Queuing Theory, has emerged. In
Publicado em: 2004
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20. O uso da internet por docentes da área de Saúde Pública no Brasil / Internet use by professors of the public health area in Brazil
Objective. The main objective of this study is to investigate the influence of the Internet on the academic-scientific activities of Brazilian professors of the public health area. Method. Transversal study centered on the user view about influences of the internet on the academic teaching and research. The studys core was constituted by 237 professors fro
Publicado em: 2004
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21. MULTICAST COMMUNICATION IN OPTICAL IP INTERNETWORKS / DIFUSÃO SELETIVA EM INTER-REDES IP BASEADAS EM REDES ÓPTICAS
Multicast communication and recent advances in optical technology, most specifically in Wavelength Division Multiplexing (WDM), allied with the consolidation of IP as the dominant protocol of convergent networks, offer new perspectives for the next generation Internet. This thesis utilises these technologies to propose a set of adaptations, called MIRROR, to
Publicado em: 2003
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22. Estrategias evolutivas para a rede optica a partir de aneis WDM
When evolving from SDH/SONET synchronous network infrastructures, WDM networks tend to be initially configured in the same physical topology as their client networks: the ring. The fast growth of high-speed traffic volumes that characterize modern networks, however, is expected to drive the evolution of this topology. Growing the fiber plant by adding up mor
Publicado em: 2002
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23. CATV / GIGABIT ETHERNET / DWDM : NEW TECHNICAL AND ECONOMIC ALTERMATIVES TO THE LAST MILE / CATV/GIGABIT ETHERNET/DWDM: NOVAS ALTERNATIVAS TÉCNICAS E ECONÔMICAS PARA A ÚLTIMA MILHA
CATV / Gigabit Ethernet / DWDM : New Technical and Economic Altermatives to the Last Mile is aiming at describing the activation of a new family of functionalities applicable to a CATV distribution network together with a delivery of broadband data. Optical domain DWDM technology is used, associated with new coaxial cable distribution topologies and the Giga
Publicado em: 2002
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24. WorkToDo : um sistema de gerenciamento de Workflows para ambientes de comunicação sem fio
Traditional Workflow Management Systems (WFMS) may only be used from permanent, high-speed, trustworthy connections. This is a restriction that becomes even more severe with the increasing use of mobile computing and wireless networks, where connections are unstable and non-permanent. In this dissertation we propose the WorkToDo system, a WFMS for wireless c
Publicado em: 2002