Wi Technique
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Design and Fabrication of a Novel Compact Low-loss Microstrip Diplexer for WCDMA and WiMAX Applications
Abstract In this paper, a novel miniaturized microstrip diplexer using two bandpass filters (BPFs) is designed and fabricated. The filters consist of stub loaded coupled lines. Additional stubs and T-shape feeding structures are added to miniaturize the size of the presented diplexer. With the adopted special structure, low insertion losses and compact size
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 11/11/2019
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2. The study of the ground plane effect on a Multiband PIFA Antenna by using Genetic Algorithm and Particle Swarm Optimization
Abstract The ground plane plays an important role on the performance of a planar inverted-F antenna (PIFA). In this regard, the ground plane modification using slots is proposed in this research to obtain a dual band antenna for WiMAX application. Popular optimization techniques, as genetic algorithm (GA) and particle swarm optimization (PSO), were used to d
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-12
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3. Catalytic Capture of CO2 with Template-Containing Zn/MCM-41 and Its Transformation to Solid Carbonate
Mesoporous MCM-41 materials modified by zinc have been prepared by non hydrothermal procedure. Zinc has been introduced by the direct synthesis (DS), template ion-exchange (TIE) and wet impregnation (WI) methods. The catalysts were characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy-scanning electron microscopy (EDX-SEM), thermogra
J. Braz. Chem. Soc.. Publicado em: 2016-12
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4. Arquitetura da Informação aplicada a leitores de e-book: avaliando a interface do Kindle III Wi-Fi
This research analyzed the Information Architecture (IA) for reading interface of ebooks provided by the Kindle III WiFi software, from the perspective of the four fundamental principles of IA for Web, defined by Peter Morville e Louis Rosenfeld, identified as: organization system, navigation system, labeling system and search system. The research was made b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/03/2012
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5. Renal oxygen content is increased in healthy subjects after angiotensin-converting enzyme inhibition
OBJECTIVE: The association between renal hypoxia and the development of renal injury is well established. However, no adequate method currently exists to non-invasively measure functional changes in renal oxygenation in normal and injured patients. METHOD: R2* quantification was performed using renal blood oxygen level-dependent properties. Five healthy norm
Clinics. Publicado em: 2012-07
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6. Estimativa do número de estações de rádio base para a implantação do WIMAX no Distrito Federal
During the past years, the video, voice and data services available in the fixed communications networks have been requested by users in mobility. This fact has motivated the development of technologies that allow traffic of a lot of information in cellular telephone networks. WiMAX e UMTS are technologies that can help the traffic flow. The WiMAX, known as
Publicado em: 2009
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7. Análise e síntese da fala por interpolação de ondas
This doctoral dissertation addresses to study of waveform interpolation (WI) for speech coding, and the description, visualization and implementation of an algorithm to simulate a conventional WI system of analysis synthesis of speech signal, like portion of a WI system for coding - decoding that operates on the outer layer which is called of WI analysis syn
Publicado em: 2005
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8. Padrões de fluxo e perda de carga em escoamento trifasico horizontal de oleo pesado, agua e ar
Considered to be of great importance to the oil industry, heavy oils represent a significant part of national, and worldwide, unexploited reserves. Do to the difficulties associated with the unfavorable characteristics ofthis type of oil, such as viscosity and density, heavy oil economic production and transportation techniques are being studied. One of thes
Publicado em: 2003
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9. Some phenotypic and genotypic characteristics of prevailing gonococcal strains in northern Norway.
Ninety two non-penicillinase producing Neisseria gonorrhoeae (non-PPNG) strains were investigated by the restriction enzyme technique with Hind III enzyme. Serogrouping by coenzyme. A with monoclonal antibodies and testing susceptibility to doxycycline were also performed by an agar dilution method. Fifteen different restriction enzyme patterns were shown, o
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10. Genotypes and phenotypes of beta lactamase producing strains of Neisseria gonorrhoeae from African countries.
The phenotypes and genotypes of 26 beta lactamase (penicillinase) producing strains of Neisseria gonorrhoeae (PPNG) from African countries were investigated. Using the restriction enzyme technique nine different restriction enzyme patterns were found, two of them in 15 strains. Of the 26 strains, 16 belonged to serogroup WI (containing protein type IA) and 1
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11. Demonstration of a Herpes Group Virus in Cultures of Peripheral Leukocytes from Patients with Infectious Mononucleosis
Cultures were initiated with peripheral leukocytes from individuals: (i) in the acute stage of infectious mononucleosis (IM); (ii) with past histories of IM; and (iii) without histories of IM and without antibodies to EB virus (EBV). In confirmation of other reports, the first group of cultures developed readily and rapidly into lines of blastoid cells. Cell
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12. Evaluation of cellular substrates for antinuclear antibody determinations.
The immunofluorescent technique was employed to evaluate the sensitivity of 10 human and animal cell monolayers and tissue sections as substrates for titering the antinuclear antibody content of serum samples. The highest mean ranks of sensitivity, the relative ability of each substrate to maintain its sensitivity rank when 21 selected positive sera were tes