Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2008. / Submitted by Luis Felipe Souza (luis_felas@globo.com) on 2009-03-12T18:23:54Z No. of bitstreams: 1 2008_Dssertacao_LorizaAndrade.pdf: 1776899 bytes, checksum: 832f8a8d637c472d86fab948bf77744f (MD5) / Approved for entry into archive by Guimaraes Jacqueline(jacqueline.guimaraes@bce.unb.br) on 2009-03-19T13:18:19Z (GMT) No. of bitstreams: 1 2008_Dssertacao_LorizaAndrade.pdf: 1776899 bytes, checksum: 832f8a8d637c472d86fab948bf77744f (MD5) / Made available in DSpace on 2009-03-19T13:18:19Z (GMT). No. of bitstreams: 1 2008_Dssertacao_LorizaAndrade.pdf: 1776899 bytes, checksum: 832f8a8d637c472d86fab948bf77744f (MD5) / A tecnologia Voice over IP (VoIP) permite a transmissão de pacotes de voz em uma rede IP. Uma rede convergente para voz e dados resulta em redução de custos e de redes a serem gerenciadas. Entretanto, a adição de protocolos VoIP aumenta a complexidade da configuração de do gerenciamento dos dispositivos. Voz utiliza mais recursos de rede, impactando o tráfego de dados. Adicionalmente, voz exige um alto nível de performance que está diretamente relacionada com a satisfação do usuário final. Uma rede convergente ideal deve atender as necessidades do tráfego de voz com o mínimo impacto no tráfego restante. Este trabalho fornece um estudo, através de simulações realizadas com o software da OPNET, sobre o impacto da migração do tráfego de voz da RTPC para a rede IP de um provedor de serviço de telecomunicações, utilizando dados reais obtidos por meio das redes em produção. Sugere ainda a configuração de políticas de qualidade de serviço para ajudar a manter um nível de satisfação semelhante ao obtido pela RTPC. ______________________________________________________________________________________ ABSTRACT / Voice over IP (VoIP) technology allows transmission of voice packets on an IP network. A converged network for voice and data results in cost savings as well as fewer networks to manage. However, the addition of VoIP protocols increases the complexity of device conFiguration and management. Voice takes up network resources and impacts data traffic. Additionally, voice has stringent end-to-end performance requirements that translate directly to end-user satisfaction. An ideal network design should meet the voice performance requirements with minimal impact on the remaining traffic. This paper provides guidance, based on simulations performed by OPNET software using real data imported from production networks, on how you can audit VoIP conFigurations and conduct a voice readiness assessment. Based on the simulations conducted, this paper also suggests quality of service policies in order to help maintain a satisfaction level similar to the level obtained by the PSTN.

The main objective of this thesis is to perform a study of and optimize the most direct and practical gas mixture composition inside the Radial Time Projection Chamber for the Barely-Offshell Nucleon Structure (BONuS 12) detector for use in the CLAS 12 detector in Experimental Hall B at Thomas Jefferson National Accelerator Facility (JLab). The optimization of these conditions will enhance the performance and resolution of the detector. The original BONuS 6 experiment utilized a gas composition of 80 % He and 20% Dimethyl Ether (DME). With the extensive 12 GeV energy upgrade constructed at JLab and the new BONuS 12 detector established , it is imperative that the gas composition utilized, is best suited to facilitate the experimental needs and demands. BONuS 12 is an experiment designed to measure the momentum of recoiling spectator protons down to 70 MeV/c. This technique will extract the structure function Fn 2 at large x from 0.1 up to 0.8 over a significant range in Q2 and W from the nucleon mass, with a beam energy of 11 GeV, enabling us to essentially select free neutrons.