Crystal Image
Mostrando 1-12 de 46 artigos, teses e dissertações.
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1. Microscopía fototérmica para el estudio de transformaciones de fase
ABSTRACT A novel system allowing a high spatial resolution mapping of the thermal diffusivity as a function of temperature up to 1800 K is presented. The system is based on a photothermal technique recently developed by the group, consisting in measuring, with a probe laser beam, the curvature induced by local heating with a modulated pump laser. A microscop
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Microstructural Stability of a Niobium Single Crystal Deformed by Equal Channel Angular Pressing
A [211]-oriented niobium single crystal was deformed by equal channel angular pressing (ECAP) at room temperature using the route Bc to a total strain of 9.2. A sharp cube texture develops after ECAP processing. The deformed samples were annealed in vacuum from 400ºC (673 K) to 900ºC (1173 K) for 1 h to evaluate their microstructural stability. Scanning el
Mat. Res.. Publicado em: 13/07/2017
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3. Photorefractive digital holographic microscopy: an application in the microdevices surfaces
In this work, we present a Photorefractive Digital Holographic Microscopy (PRDHM) technique based on the writing-reading holographic process in photorefractive Bi12TiO20 (BTO) crystal using the numerical reconstruction of the phase and amplitude image performed by a Digital Holographic Microscopy (DHM) method. We demonstrate that a holographic reconstructed
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
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4. Cristais de tempo: o cinema de Andrei Tarkovski
Resumo A ideia desse estudo é analisar a obra do cineasta russo Andrei Tarkovski, principalmente os filmes Stalker e o Espelho a partir de categorias deleuzianas sobre o cinema, tendo como foco a percepção de tempo cinematográfica presente nos livros Imagem movimento e Imagem tempo. Pretendemos propor uma relação direta entre o conceito de imagem-crist
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2012
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5. Detecçăo e estudo da microvazăo de líquidos em fibras de cristal fotônico usando difraçăo na microestrutura
In this work, we introduce photonic crystal fibers and the study of liquid flow within those, by observing changes in the diffraction pattern generated in a a laser beam laterally incident in the fiber. By launching the laser beam perpendicularly onto the side of the photonic crystal fiber, a characteristic diffractive pattern is created by the cladding micr
Publicado em: 2010
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6. Aplicações da radiografia por contraste de fase em tecidos de mama in vitro / Applications of phase contrast imaging to breast tissues in vitro
In this dissertation we have produced in vitro breast images by a phase contrast imaging technique using the diffraction enhanced imaging (DEI) method. The DEI setup was implemented both at the X-ray applied Crystallography Laboratory (LCARX) using a conventional generator and at the XRD2 beamline of the Brazilian National Synchrotron Light Laboratory (LNLS)
Publicado em: 2009
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7. A construção da identidade afrobrasileira nos espaços das irmandades do Rosário do sertão paraibano.
The context of the post-modernity society forms the identities references, whose model is entangled in new paradigms that, in spite of the cultural base, they are going conditioning the identity that the subject can have, what can be, and not what is. The objective of this study is to understand the Fraternities of Rosary in Paraiba Country town as construct
Publicado em: 2009
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8. SEGMENTAÇÃO DE GRÃOS DE HEMATITA EM AMOSTRAS DE MINÉRIO DE FERRO POR ANÁLISE DE IMAGENS DE LUZ POLARIZADA / HEMATITE GRAIN SEGMENTATION OF IRON ORE SAMPLES BY POLARIZED LIGHT IMAGE ANALYSIS
The aim of the present work is to classify co-registered pixels of stacks of polarized light images of iron ore into their respective crystalline grains or pores, thus producing grain segmented images that can be analyzed by their size, shape and orientation distributions, as well as their porosity and the size and morphology of the pores. Polished sections
Publicado em: 2008
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9. Fabricação e caracterização de dispositivos poliméricos emissores de luz com camada ativa de poli(2-metóxi, 5-(2-etil-hexilóxi)-1,4-fenileno vinileno) (MEH-PPV) / Fabrication and characterization of polymer light-emitting diodes with active layer composed by poly(2-methoxy, 5-(2-etil-hexilhoxy)-1,4-phenilene vinilene) (MEH-PPV).
Polymer light emitting diodes (PLEDs) have been widely investigated as candidate materials for display fabrication. The main advantages exhibited by PLEDs are the low-cost processing and possibility of large-area display fabrication, in comparison to the conventional liquid crystal displays (LCDs). Although the engineering aspects concerning device fabricati
Publicado em: 2008
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10. Pinning of Abrikosov Vorticein MG B IND. 2 addition of NI nanoparticles / Aprisionamento dos Vortices de Abrikosov no MG B IND. 2 atraves da adição de nanoparticulas de NI
Since the discovery of the phenomenon of superconductivity in magnesium diboride (MgB2) in the year 2001, the vortex dynamics in this material has been widely studied, because this phenomenon can cause the destruction of the superconducting state. This study intends to assess the impact on the pinning of vortex and the behavior of the critical current densit
Publicado em: 2008
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11. Effect of homeopathic preparation on yellow nutsege (Cyperus rotundus L.) plants / Avaliação de preparados homeopáticos em tiririca (Cyperus rotundus L.)
The objective of the present work was to evaluate the effect of homeopathic preparations of yellow nutsege leaves on yellow nutsege plants. The experiment was carried out in a randomized block design with 5 treatments, consisting of 4 homeopathic preparations of yellow nutsege leaves at dynamizations 3CH, 6CH, 7CH and 11CH, distilled water as control and 4 r
Publicado em: 2008
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12. As potencias da imagem-tempo e o cinema utopico de Lars von Trier / The time-image potenctials and the utopic cinema of Lars von Trier
This work aims to describe what it might constitute as utopist in the contemporary cinema, more precisely in some of the films that take part of Scandinavian Lars von Trier s cinematography. This research has a major focus in Dancer in the Dark. However, it must be underlined that analyses have been dane for Epidemic and The Five Obstructions. The books abou
Publicado em: 2007