Telecommunications
Mostrando 1-12 de 312 artigos, teses e dissertações.
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1. A Design of a Compact Microwave Diplexer in Microstrip Technology Based on Bandpass Filters Using Stepped Impedance Resonator
Abstract This paper describes the design of a compact microstrip microwave diplexer based on bandpass filters and a stepped impedance resonator for 4G applications. The diplexer is composed of two band-pass filters (BPF) that operate at 1.8 and 2.5 GHz. Both bandpass filters for the receiver at 1.705-1.895 GHZ and the transmitter at 2.41-2.6 GHZ have a -3dB
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Non-Ionizing Radiation Analysis in Close Proximity to Antenna Tower: A Case Study in Northeast Brazil
Abstract While the amount of telecommunications services grows rapidly in the whole world, humans get potentially more exposed to Non-Ionizing Radiation (NIR) from a number of different sources. Measurements of NIR levels are relevant in order to compare the results with national and international standards, aiming at the preservation of human health. Thus,
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-03
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3. Efficiency of electricity distribution companies
Abstract Purpose After assessing papers on efficiency, most of the studies available are focused on the analysis of efficiency measures, without providing a deep discussion of the factors that determine efficiency. This study aims to evaluate the efficiency of Brazilian electricity distribution companies based on a structural model that enables the identifi
RAUSP Manag. J.. Publicado em: 2020-06
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4. A compatibilidade da prática de zero-rating com a previsão de neutralidade de rede
Resumo Este artigo aborda a definição do conceito jurídico de neutralidade de rede conferida pela legislação brasileira, conforme interpretação dada ao art. 9º do Marco Civil da Internet, pela qual a neutralidade de rede refere-se ao tratamento isonômico dos pacotes de dados que transitam na rede, de modo a resguardar seu caráter aberto. A partir d
Rev. direito GV. Publicado em: 05/08/2019
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5. Smart Grid na América Latina: Caso Ampla de Inovação no Setor Elétrico
Resumo Este caso apresenta o dilema vivido por Ramon Gonzales, engenheiro de telecomunicações do setor de Pesquisa e Desenvolvimento da AMPLA, uma das maiores distribuidoras de energia elétrica do Rio de Janeiro. O caso se passa no ano de 2010 quando os executivos da empresa enfrentavam diversos desafios relacionados à distribuição de energia ao mesmo
Rev. adm. contemp.. Publicado em: 27/06/2019
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6. A glimpse of the future in animal nutrition science. 2. Current and future solutions
ABSTRACT Despite tremendous advancements in the livestock sector, additional opportunities exist to improve even further livestock production around the globe. Forecasting is not an exact science and it relies heavily on past and current knowledge. Improvements in the nutritional sciences (both human and animal) include a better understanding of agents that
R. Bras. Zootec.. Publicado em: 2017-05
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7. REGULATION MISUNDERSTANDING: CONVERGENCE COMPLEXITY PROVIDING FAILURES IN TELECOMMUNICATION SERVICES COSTS
ABSTRACT This manuscript discusses a theoretical competitive scenario for telecommunications services, in particular voice over Internet protocol (VoIP), and finds that the economic benefits of the current technological convergence are based on three main factors: technological advances and updates; regulation failures related to technological complexity; an
JISTEM J.Inf.Syst. Technol. Manag.. Publicado em: 2017-04
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8. High-Altitude Platforms — Present Situation and Technology Trends
ABSTRACT High-altitude platforms (HAPs) are aircraft, usually unmanned airships or airplanes positioned above 20 km, in the stratosphere, in order to compose a telecommunications network or perform remote sensing. In the 1990 and 2000 decades, several projects were launched, but very few had continued. In 2014, 2 major Internet companies (Google and Facebook
J. Aerosp. Technol. Manag.. Publicado em: 2016-09
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9. Reliable Energy-Efficient Multilayer Mechanism with Realistic Battery Model and QoE Support in Wireless MANETs
Abstract Evolution in the telecommunications networks and the rapid advances made in wireless mobile communication networks, have taken computer networks to a new communication level. They now provide support for new mobile multimedia applications and are thus fostering the development of new network types and configurations. MANET is an important configurat
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-03
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10. State of the art: integrating services for mega events
This paper describes the state of the art of a simplified model for integration of services in mega events. The project context, which was financed by the National Research Council – CNPq, is divided into six major areas or functional groups: Urban Mobility, Tourism, Airports, Security, Energy and Telecommunications. The proposal is described in layers, as
JISTEM J.Inf.Syst. Technol. Manag.. Publicado em: 2014-05
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11. Two-dimensional packing problems in telecommunications
We present the transcript of the IFORS distinguished lecture delivered by the author on invitation of SOBRAPO and IFORS. The lecture concerned the development of an interdisciplinary research motivated by an application in mobile telecommunication systems, a project jointly developed by four research teams. The presentation follows the typical steps of a cla
Pesqui. Oper.. Publicado em: 2014-04
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12. Optimal design of an IP/MPLS over DWDM network
Different approaches for deploying resilient optical networks of low cost constitute a traditional group of NP-Hard problems that have been widely studied. Most of them are based on the construction of low cost networks that fulfill connectivity constraints. However, recent trends to virtualize optical networks over the legacy fiber infrastructure, modified
Pesqui. Oper.. Publicado em: 2014-04