Access Layer
Mostrando 1-12 de 75 artigos, teses e dissertações.
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1. Cirurgia híbrida na exérese de tumor glômico Shamblin II
Resumo O tumor glômico é uma neoplasia benigna rara originada de células paraganglionares da crista neural que se desenvolve na camada adventícia do vaso. São tumores não encapsulados e altamente vascularizados. Paciente feminina, 64 anos, foi diagnosticada com tumor glômico hipervascularizado com 5 cm posteriormente à bifurcação carotídea esquer
J. vasc. bras.. Publicado em: 21/02/2019
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2. Proposal for a New Histological Scoring System for Cartilage Repair
OBJECTIVE: This study aimed to develop a new histological scoring system for use in a partial-thickness cartilage repair animal model. Although previous papers have investigated the regeneration of articular cartilage, the good results achieved in small animals have not been replicated in large animal models or humans, possibly because of the frequent use o
Clinics. Publicado em: 29/11/2018
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3. Laparoscopic repair for vesicouterine fistulae
ABSTRACT Objective: The purpose of this video is to present the laparoscopic repair of a VUF in a 42-year-old woman, with gross hematuria, in the immediate postoperative phase following a cesarean delivery. The obstetric team implemented conservative management, including Foley catheter insertion, for 2 weeks. She subsequently developed intermittent hematur
Int. braz j urol.. Publicado em: 2015-10
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4. Particle swarm optimization in WDM/OCDM networks with physical impairments
In this paper, optimization procedures based on particle swarm optimization (PSO) are investigated, aiming to efficiently solve the optimal resource allocation for signal-to-noise plus interference ratio (SNIR) optimization of optical code paths (OCPs) from wavelength division multiplexing/optical code division multiplexing (WDM/OCDM) considering imperfectio
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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5. New strategies for planning and performance evaluation of wireless networks: case studies based on the cross-layer approach
The use of wireless local area networks, called WLANs, as well as the proliferation of the use of multimedia applications have grown rapidly in recent years. Some factors affect the quality of service (QoS) received by the user and interference is one of them. This work presents strategies for planning and performance evaluation through an empirical study of
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-06
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6. MÃtodo para avaliaÃÃo de aspectos de camada fÃsica e MAC de redes 802.11. / Method to evaluate physical and MAC layer aspects of 802.11 networks.
The present dissertation proposes a 802.11 network evaluation sequence which can be adopted, independently of the equipment used at the network. The log-distance path loss model is used for the environment characterization (by the model β parameter) where the network is evaluated. The specific objectives of each evaluation stage are presented and contex
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2012
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7. Proposal of a new approach for BER evaluation of multirate, multiservice OCDMA systems / Proposta de uma nova abordagem para o cálculo da BER de sistemas OCDMA de múltiplas taxas e multiserviços
The continuous evolution of the optical communication technology in the last few years has allowed the growing users demand for higher bandwidth to be satisfactorily attended. This new demand is mainly attributed to the growing popularity of bandwidth-intensive networking applications, such as Internet protocol television (IPTV), high-definition television (
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/08/2012
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8. Catalisadores de Pd metálico modificados por líquidos iônicos para a hidrogenação seletiva de compostos poli-insaturados
In this work, heterogeneous catalysts immobilized on supported ionic liquid (IL) were prepared, characterized and investigated in hydrogenation reactions of the substrates 1,5-cyclooctadiene (1,5-COD), trans-cinnamaldehyde (CALD) and nitrobenzene (NB). Two methods were used to prepare the catalysts. In the first, commercial Pd/C catalyst was coated with diff
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/08/2012
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9. Planejamento e gerenciamento de recursos para redes IEEE 802.16 baseadas em rádio sobre fibra / Resource planning and management for IEEE 802.16 networks based on radio over fiber
The Radio over Fiber technology allows the reduction of the cost of installation and maintenance of wireless access networks, since it can allow an optimized use of radio frequency (RF). Moreover, it employs simplified and inexpensive antennas. The IEEE 802.16 wireless networks, known as WiMAX, are low cost solutions for the last mile access to the Internet.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/06/2011
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10. Implementação de processador banda base ofdma para downlink lte em fpga
This work treats of an implementation OFDMA baseband processor in hardware for LTE Downlink. The LTE or Long Term Evolution consist the last stage of development of the technology called 3G (Mobile System Third Generation) which offers an increasing in data rate and more efficiency and flexibility in transmission with application of advanced antennas and mul
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/03/2011
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11. New ex-vivo organ model for percutaneous renal surgery
OBJECTIVES: Percutaneous Renal Surgery (PRS) is a demanding procedure and success is mostly hampered by the lacking of training facilities. Thus, the purpose of the study was to evaluate a significantly improved pre-existing porcine kidney-training model for percutaneous renal access and PRS. MATERIALS AND METHODS: A biologic training model using porcine kid
International braz j urol. Publicado em: 2011-06
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12. A new cross-layer adaptive architecture to guarantee quality of service in WiMAX networks / Uma nova arquitetura adaptativa entre camadas para garantir qualidade de serviço em redes WiMAX
Redes sem fio devem prover qualidade de serviço para aplicações de voz, video e dados. Um padrão definido para oferecer qualidade de serviço nessas redes é o documento IEEE 802.16. Com o objetivo de melhorar a qualidade de transmissão, este padrão utiliza dois principais mecanismos físicos: (i) Orthogonal Frequency Division Multiple Access como inte
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011