Waves Generation
Mostrando 13-24 de 73 artigos, teses e dissertações.
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13. Previsão de ondas oceânicas por ensemble : uma revisão e estudo de caso
The ensemble numerical prediction of ocean waves is considered and all published works on this new topic in Geosciences are reviewed. A Wave Ensemble Prediction System is described where a global third-generation wave model is adopted. Twenty members are generated by a method based on Empirical Orthogonal Functions and a particular realistic case where sever
Publicado em: 2010
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14. Tin and zinc oxides semiconductor devices / Dispositivos semicondutores a partir de óxidos de estanho e zinco
This work presents the study and development of semiconductor devices base on tin and zinc oxides. The first device is related to the development of pH sensors based on field effect, while the second device uses surface acoustic waves for the transport of carriers related to a single photon detector device. Initially, the semiconductors were used as hydrogen
Publicado em: 2009
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15. Crises paroxísticas recorrentes em ratos por inibição do transporte de glutamato durante o desenvolvimento / Genesis of recurrent epileptic paroxysmal burst in newborn rats after inhibition of glutamate transporters
It has been previously shown that cell-surface glutamate transporters efficiently control network activity in the maturing rodent brain, preventing the generation of seizures. In particular, inhibition of glutamate transporters by DL-TBOA leads to a pathological EEG pattern in freely moving rat pups. This is composed of partial seizures and recurrent short p
Publicado em: 2009
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16. Aspectos da transmissão e processamento de informação em canto de anuros / Features of Transmition and processing of information in anuran vocalization
Biological systems interact with their environment in many forms. The way these interactions occur can be assigned, ultimately, as the transmission of messages. Transmission of messages by sound waves, in animals, is a well studied subject because they are an important way of communication used by many groups. The objective of the present work is to verify w
Publicado em: 2009
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17. Estimate of energy balance in the basin Jaguaribe-CE using remote sensing techniques / Estimativa do balanço de energia na bacia do Baixo Jaguaribe utilizando técnicas de sensoriamento remoto.
Using techniques of remote detection, this work aimed to obtain the energy balance in the Basin of Low Jaguaribe, Perimeter irrigated Tabuleiro de Russas and dam Santo Antônio de Russas. Two images of sensor TM of the satellite Landsat 5 obtained together DGI (Department of Generation of Images) of INPE, composed by six bands, (1,2,3,4,5,7) of the spectrum
Publicado em: 2009
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18. Estudo experimental da influência de um ressonador de volume variável na massa de ar admitida por um motor de combustão interna
The dynamic of intake manifold admission on internal combustion engines involves parameters such as length, diameter, camshaft rotation and other geometries and accessories. The alternative movements of the admission valves and piston produce the phenomena of generation of pressure waves that spread through the conduit. Such waves, if well used, can increase
Publicado em: 2008
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19. Um estudo simplificado da percepção pública dos benefícios e riscos de centrais termonucleares - sugestões para a comunicação de valor com o público / Public perception on the benefits and risks of nuclear power plants_a simplified study
Public acceptance of the nuclear based electricity generation depends on many variables that can be affected by circumstances and interests, which although seemingly not close to the issue, can strongly influence the final outcome. Explicit or consented positions assumed by opinion makers and some segments of society are subject to episodic waves of interact
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/03/2007
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20. Desenvolvimento de dispositivo de geração e absorção ativa de ondas para tanque de ensaios de estruturas oceânicas. / Development of a device for generation and active absorption of waves in a tank for testing of oceanic structures.
Este trabalho trata do desenvolvimento de um gerador e absorvedor dinâmico de ondas para ensaios com modelos de estruturas oceânicas em escala reduzida, em tanques que simulam as condições de operação encontradas no mar. Propõe-se um procedimento para o projeto de geradores absorvedores ativos de ondas do tipo placa basculante. O procedimento desenvol
Publicado em: 2007
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21. Estudo de frentes mesosféricas na região equatorial / Study of mesospheric fronts in the equatorial region
An extensive study on mesospheric fronts was carried out by means of mesospheric airglow image observation at at São João do Cariri, PB (7,4oS; 36,5oW) from July 2004 to December 2005. All sky airglow images, meteor radar wind and TIMED/SABER satellite temperature data were used in order to investigate physical scenario of the mesospheric front. Three diff
Publicado em: 2007
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22. Bombeamento optico de moleculas polares por laser selado de 13 ANTPOT. ( C O IND. 2 ) para geração de ondas Terahertz / Optically pumped of polar molecules for sealled-off 13 ANTPOT. ( C O IND. 2 ) laser for generation Terahertz waves
Neste trabalho realizamos três importantes etapas: 1) montar e caracterizar um laser selado de 13C02, 2) empregar o laser selado de 13C02 como fonte de bombeamento óptico para a molécula de metanol CH30H, e utilizá-lo pela primeira vez, para excitar o isótopo de metanol 13CH30H para geração de ondas na região do TeraHertz (THz) e 3) Propor "assignmen
Publicado em: 2007
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23. Nonlinear optical properties of some newly developed crystals for measurement of ultrafast laser pulses
Second harmonic generation (SHG) in nonlinear optical crystal is well-established technique for the measurement of the pulse-width of ultrafast femtosecond laser pulses. However, only selected nonlinear crystalline materials are suited for this purpose due to the limitations in transparency cut-off, limited phase-matching wavelength range, and large differen
Brazilian Journal of Physics. Publicado em: 2006-12
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24. Theory and computer modelling of Alfvén wave heating in TCABR Tokamak / "Teoria e modelamento computacional de aquecimento de plasma por ondas de alfvén no tokamak TCABR"
In this work we present the study of the determination the best regimes and parameters¶for the heating experiments and current generation and plasma flow in the tokamak TCABR. Study of effects of plasma rotation in low frequency (LF), field penetration, absorption and ponderomotive forces in Tokamak Chauffage Alfvén Brésilien (TCABR)is investigated wi
Publicado em: 2006