The Crucible
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. The conception of modern tragedy in the Crucibleand A view from the bridgeby Arthur Miller / A concepção da tragédia moderna em The cruciblee A view from the bridgede Arthur Miller
A presente pesquisa dedica-se ao estudo da forma de tragédia moderna utilizada pelo dramaturgo americano, Arthur Miller, em The Crucible [As Feiticeiras de Salém] (1953) e A View From the Bridge [Panorama Visto da Ponte] (versão de dois atos, de 1956), apoiando-se na obra Tragédia Moderna do crítico inglês, Raymond Williams, e concentrando-se no texto
Publicado em: 2007
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14. Influência de diferentes fontes fotoativadoras na conversão de resinas compostas
This study evaluated the influence of different light sources on the conversion of different composite resins by Differential Scanning Calorimetry (DSC). Initially was determined the standard of the devices emission of light, one halogen light curing unit (Optilux 500 - Demetron/Kerr) and three generations of LEDs (LEC-470 I - MMOptics, Radii Plus - SDI and
Publicado em: 2007
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15. Evaluation of carbon effect in mould fluxes for continuous casting of steel. / Avaliação do efeito do carbono em fluxantes para lingotamento contínuo de aços.
In order to assure good performance of mould flux for continuous casting of steel, the chemical composition definition is important to guarantee the properties needs to its perfect behavior in the mould. Carbon is added to the mould flux to control the melting rate, since this property is related to the availability of liquid slag to fill in the gap between
Publicado em: 2006
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16. Study of reduction in self-reducing pellet of chromites. / Estudo da redução de pelotas auto-redutoras de cromita.
The reduction behaviors, at high temperature, of the self-reducing pellets of chromites for production of high carbon ferro-chromium are studied in this work. The influences of the temperature, of the excess of reductant and the small addition of the Fe-Si were analyzed. The materials used (chromites, petroleum coke, Portland cement, hydrated lime and silica
Publicado em: 2006
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17. CRESCIMENTO E CARACTERIZAÇÃO DE FIBRAS MONOCRISTALINAS DE FLUORETOS DO TIPO LiY1-xTRxF4 (TR = TERRAS-RARAS) / GROWTH AND CHARACTERIZATION OF FLUORIDE CRYSTALLINE FIBRES TYPE LiY1-xTRxF4 (RE = RARE-EARTH)
In this work we present the growth and characterization of LiF and pure and rare-earth doped (Er and Nd) yttrium-lithium tetra-fluoride (LiYF4 or YLF) by the micro-pulling-down technique (µ-PD). The use of this technique is original for the present purpose. A m-PD prototype in the resistive mode was firstly built to understand the most important operational
Publicado em: 2005
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18. Phase relations study on the melting and crystallization regions of the Bi-2223 high temperature superconductor
The melting and solidification behavior of Bi2Sr2Ca2Cu3 O10 (Bi-2223) precursors has been studied. Nominal compositions corresponding to excess of liquid, Ca2CuO3 and CuO have been investigated. Each sample was made by packing a precursor powder into a silver crucible, in order to approximately simulate the situation found in 2223 silver-sheathed tapes. The
Materials Research. Publicado em: 2004-09
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19. O efeito da granulometria na decrepitação durante a decomposição térmica de calcários e carvão
The use of fluidized bed combustors to burn coal is largely studied to permit the addition of limestone to capture SO2. The particle size for coal and limestone is an important parameter in this process. Thermogravimetry (TG) is used to elucidate the combustion and sulfation processes, but the experimental parameters must be evaluated to be representative in
Química Nova. Publicado em: 2004-02
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20. Study of optical properties of crystalline fibers of CVO:nd3+ and CMO: nd3+/nb5+ / Estudo das propriedades ópticas de fibras cristalinas de CVO:Nd3+ e CMO:Nd3+/Nb5
The present work release an extensive study of spectroscopic properties on CMO:NdNbO4 and CVO:Nd3+ single crystal fibers, in searching for new laser materials activated with diode laser. The fibers were grown by LHPG (laser Heated Pedestal Growth) technique that permits a fast production of fibers with appropriate dimension for mini laser construction, witho
Publicado em: 2003
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21. Mecanização e automação de metodologias de analise quimica : instrumentação para destilação seguida de detecção por (ICP OES) e para extração liquido-solido e detecção por espectrometria no visivel
In this work we present two equipment that were built from a common basis (an electronic interface): the first is a mechanized equipment capable of volatilizing compounds with boiling point up to 160°C and injecting them dírectly in to the torch of an inductively coupled plasma optical emission spectrometer. The equipment consists of a rotative tray that w
Publicado em: 2002
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22. Processos de magnetização em supercondutores do tipo II : um estudo em monocristal de ErBaCuO com defeitos colunares
We present in this work a study of the magnetization and vortex lattice behavior, when a superconducting ErBa2CU3O7-d single crystal with columnar defects is rotated under a fixed magnetic field. We describe the procedures used in the development of BaZrO3 crucibles, and in the growth of YBa2CU3O7-d and ErBa2CU3O7-d single crystals using this crucible and al
Publicado em: 2001
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23. Estudos de relaxação magnetica em supercondutores do tipo - II
We present in this work a study of magnetic relaxation in superconducting Y1Ba2CU3O7-d samples. We have used a single crystal grown in zirconia crucible, with Tc ~ 90 K and D T ~ 2 K; and a directionally solidified MTG sample with 17 % of Y211, Tc ~ 91 K and .D T ~ 2 K for H = 10 Oe. We discuss in a simplified manner the most relevant aspects of the magnetic
Publicado em: 2001
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24. Preparação e caracterização de vidros de oxidos de metais pesados para optica não linear
We studied the system TiO2 - BaO - ZnO - B2O3, where we fixed the ZnO and B2O3 compositions, vaying the ratio TiO2/ BaO from 0.87 a 1.76. A super-Kanthal resistance furnace was used to melt the compounds inside alumina crucibles, at about 1200 °C, during 10 minutes. After melting, the glasses were poured out in steel moldes and rapidly cooled by quenching.
Publicado em: 1993