Wave Excitation
Mostrando 13-24 de 94 artigos, teses e dissertações.
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13. Alterações cardiovasculares de fêmeas de ratos espontaneamente hipertensos (SHR) relacionadas com a idade / Cardiovascular changes in female spontaneously hypertensive rats (SHR) age-related
Hypertension is a major cause of cardiovascular disorders, and the natural progression of this disease may trigger further changes in the circulatory system. Experimental models are widely used in studies on the changes that occur in the cardiovascular system induced by hypertension. The SHR is the model that most closely matches the human hypertension, as i
Publicado em: 2011
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14. Development of an optical fluorescence imaging system for medical use / Desenvolvimento de um sistema por imagem de fluorescência óptica para uso médico-odontológico
Optical fluorescence has been applied to several medical areas, as to monitor drug degradation and cancer detection, due to its high sensitivity, simplicity and fast response. Non-invasive and non-destructive assessment of tissues using this technique is very attractive for clinical diagnosis. Hence, the aim of was the development of an optical fluorescence
Publicado em: 2010
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15. Ordem-desordem: uma avaliação estrutural do Ba(ZrxTi1-x)O3 / Order-disorder: an evaluation structural of Ba(ZrxTi1x)O3
This work have as aim, the synthesis of ceramic powders of Ba(ZrxTi1x)O3 (x = 0, 0.25, 0.50, 0.75 and 1) by the polymeric precursor method and investigate the degree of structural order-disorder of these systems by different characterization techniques, such as: thermogravimetric analysis (TA), differential thermal analysis (DTA), X-ray diffraction (XRD), Ra
Publicado em: 2009
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16. Influence of ultrasonic setting on compressive and diametral tensile strengths of glass ionomer cements
The aim of this study was to assess the influence of ultrasonic wave propagation on the compressive (CS) and diametral tensile (DTS) strengths of glass ionomer cements (GICs). Three variables were evaluated: conventional GICs, ultrasonic excitation and storage time (1 hour, 24 hours and 7 days). Bovine teeth molds were used for simulating a clinical ultrason
Materials Research. Publicado em: 2008-03
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17. Detecção condutométrica sem contato: uma nova ferramenta para monitoramento de interações biomoleculares em microssistemas analíticos / Contactless conductivity detection: a new tool for monitoring biomolecular interactions on analytical microsystems
The study reported in this thesis shows the application of a capacitively coupled contactless conductivity detection (C4D) for monitoring biomolecular interactions on analytical microsystems. Initially, the analytical performance of the microsystems fabricated in glass, poly(dimethylsiloxane) (PDMS) and polyester-toner (PT) was investigated in order to choos
Publicado em: 2008
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18. High sensitivity Thermal Lens spectroscopy / Espectroscopia de lente térmica de alta sensibilidade
The efficiency of conventional transmission methods used to measure absorption of hightransparent materials is usually limited by light scattering and reflection. On the other hand, Thermal Lens spectroscopy is insensible to such phenomena and has been widely applied to determinate low optical absorptions. In this thesis, we have studied a recently developed
Publicado em: 2008
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19. Chemometric methods in the electrochemical studies of phenols on boron-doped diamond films / Metodos quimiometricos em estudos eletroquimicos de fenois sobre filmes de diamante dopado com boro
The subject of this work is the application of chemometric methods in the analysis of the data obtained from electrochemical measurements of phenol compounds on boron-doped diamond electrodes (BDD). BDD films were grown from ethanol and characterized using different techniques. These materials showed good electrochemical qualities. A comparison between BDD a
Publicado em: 2007
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20. Soliton dynamics of magnetization driven by a magnetic field in uniaxial anisotropic ferromagnet
We study the nonlinear magnetic excitation in an anisotropic ferromagnet with a magnetic field. In the long wave approximation, the Landau-Lifschitz equation with easy axis anisotropy is transformed into the nonlinear Schrödinger type. By means of a straightforward Darboux transformation we obtain the one- and two-soliton solutions of uniaxial anisotropic f
Brazilian Journal of Physics. Publicado em: 2006-12
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21. Comparative study of vibracional excitation of hydrogen molecules by electron and positron impact / Estudo comparativo das seções de choque de excitações vibracionais de moleculas de hidrogenio por impacto de positrons e eletrons
Here we report a comparative calculation of both integral and differential vibrational excitation cross sections of low energy positron and electron scattering against Hydrogen molecules (H2). For these calculations we have used the Schwinger Multichannel (SMC) Method [1] for positron collision [2] and electron collision [3]. Using a set of SMC scattering am
Publicado em: 2006
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22. Theoretical study of transition metal monocarbides: MnC and CoC. / Estudo teórico de monocarbetos de metais de transição: MnC e CoC
In this work, high level ab initio multiconfigurational methods were employed to study the electronic structures and chemical bondings of several electronic states of two 3d transition metal monocarbides: MnC and CoC. The lowest-lying quartet, sextet, and octuplet electronic states of MnC, correlating with the three lowest-lying atomic dissociation channels,
Publicado em: 2006
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23. \ 58 ANTPOT. Co\ : estudo de um núcleo ímpar-ímpar na camada pf / 58Co: study of an odd-odd nucleus in the pf shell
The excited states in the doubly odd nucleus \ ANTPOT. 58 CO\ have been studied using inbeam gama-ray spectroscopy. The \ ANTPOT. 58 CO\ nucleus has been produced with the fusionevaporation reaction \ ANTPOT. 51 V\ (ANTPOT. 10 B\ , p2n) at 33 MeV bombarding energy, using the SMV Pelletron accelerator of the University of São Paulo. Gamrna-gamma-charged part
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2004
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24. Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry
The experimental results on the Alfvén mode structure identification by the microwave reflectometry in TCABR tokamak are presented. The knowledge of the spatial spectrum of the excited waves is crucial for optimization of Alfvén wave plasma heating and noninductive current drive scenarios in tokamak plasmas. No less important is the possibility to use the
Brazilian Journal of Physics. Publicado em: 2004-12