Thickness Determination
Mostrando 13-24 de 91 artigos, teses e dissertações.
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13. Determination of Film Thickness Through Simulation of Vickers Hardness Testing
In recent decades, changes in the surface properties of materials have been used to improve their tribology characteristics. However, this improvement depends on the process, treatment time and, essentially, the thickness of this surface film layer. Physical vapor deposition (PVD) has been used to increase the surface hardness of metallic materials. The aim
Mat. Res.. Publicado em: 13/04/2017
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14. Evaluation of Corrosion Caused by the use of In Natura Biogas in Steam Generator Boilers of Carbon Steel Structural Elements
This work evaluates the corrosion process caused by the presence of hydrogen sulfide in the biogas in natura, in steels commonly used in the construction of steam generator boilers, simulating conditions close to those found on the real application of these materials, exposing the test bodies directly to biogas in natura, flame of combustion and gases result
Mat. Res.. Publicado em: 10/04/2017
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15. Different methods of calculating ankle-brachial index in mid-elderly men and women: the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil)
The ankle-brachial index (ABI) is a marker of subclinical atherosclerosis related to health-adverse outcomes. ABI is inexpensive compared to other indexes, such as coronary calcium score and determination of carotid artery intima-media thickness (IMT). Our objective was to identify how the ABI can be applied to primary care. Three different methods of calcul
Braz J Med Biol Res. Publicado em: 24/11/2016
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16. Markov Chains and reliability analysis for reinforced concrete structure service life
From field studies and the literature, it was found that the degradation of concrete over time can be modelled probabilistically using homogeneous Markov Chains. To confirm this finding, this study presents an application of Markov Chains associated with the reliability analysis of experimental results of the degradation of concrete by chlorides. Experimenta
Mat. Res.. Publicado em: 30/05/2014
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17. Efeitos da espacialização da cobertura florestal e da profundidade dos solos na produção de água de uma bacia hidrográfica / Effects of the spatial distribution of forest cover and the soil depth in water yield of a watershed
Several works related to the theme of water production are being made, having in common the association of forest cover with runoff in watersheds. However, no studies were found where the places where this land cover has optimum effect, because it is dependent on climatic and physiographic conditions of each watershed. The objective of this study is to evalu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/10/2012
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18. Simulação com o código GEANT4 de medida de espessura de revestimento metálico em metal por XRF / GEANT4 simulation of measure thickness of metallic coating on metal by XRF
Nesta dissertação são apresentados resultados de simulações Monte Carlo de fluorescência de raios X (XRF), utilizando o programa GEANT4, para medidas de espessura de revestimento metálico (Ni e Zn) em base metálica (Fe). As simulações foram feitas para dois tamanhos de espessura para cada metal de revestimento, (5μm e 10μm), com passos de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/09/2012
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19. Avaliação em tomografia computadorizada por feixe cônico da quantidade de tecido ósseo de suporte, vestibular e lingual, dos incisivos centrais supeiores e a relação com suas inclinações / Cone Beam Computed Tomography evaluation of the amount of buccal and lingual supporting bone tissue of maxillary central incisors and relationship with tipping
The present study evaluated, by means of Cone Beam Computed Tomography (CBCT), the amount of supporting bone tissue, vestibular and lingual, in the upper central incisors (teeth 11 and 21) and the relationship with their dental inclinations (1.PP). The sample consisted of 30 images obtained by CBCT, belonging to adult patients, between 20 and 47 years old, o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/05/2012
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20. Hormônios tireoideanos, qualidade de carcaça e de carne e desempenho produtivo de suínos em crescimento e terminação
The objective of this study was to compare serum concentrations of the hormones triiodothyronine (T3) and thyroxine (T4) in pigs on commercial line beginning and end of growing-finishing phase, correlating them with productive performance, carcass and meat quality. Blood samples were collected from 48 animals at the beginning and end of growing-finishing pha
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/09/2011
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21. Muscularity and adiposity of carcass of Santa Inês lambs: effects of different levels of replacement of ground corn by forage cactus meal in finishing ration
The objective of this study was to evaluate the effect of the levels of replacement of ground corn by forage cactus meal in the diet on the muscularity and adiposity of carcass of Santa Inês lambs finished at feedlot. This study was carried out at Estação Experimental de Pendência, belonging to Empresa de Pesquisa Agropecuária da Paraíba S.A. (EMEPA-PB
Revista Brasileira de Zootecnia. Publicado em: 2011-10
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22. Obtenção e caracterização de revestimentos híbridos à base de precursores alcoóxidos sobre o aço galvanizado
Galvanized steel presents a protective layer of Zn and Zn-Fe, obtained by hot dipping, which promotes the steel protection. However, the presence of this layer decreases the adhesion of paint systems and reduces the corrosion resistance. A very efficient method used to protect against the substrate corrosion is chromate layers, which provide excellent antico
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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23. Caracterização de membranas de poliamida 66 preparadas pelo método de inversão de fases
In the present study, polyamide 66 (PA 66) membranes were prepared by phase inversion (PI) and characterized in order to verify their potential application in separation processes. PA 66 membranes were prepared using two different solvents, formic acid (FA) and chloridric acid (HCl), and water as a non-solvent. Membranes prepared in film form (not supported)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2010
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24. "Influência do Processamento Termomecânico sobre a Formação de Bandas de Cisalhamento e Propriedades Magnéticas de um Aço de Grão Não Orientado com 3%Si" / "Influência do Processamento Termomecânico sobre a Formação de Bandas de Cisalhamento e Propriedades Magnéticas de um Aço de Grão Não Orientado com 3%Si"
Non-oriented silicon steels are soft magnetic materials widely used in equipments for electricity generation and distribution. The obtaining of both high magnetic induction and low magnetic loss has been subject of research for the improvement and development of new nonoriented silicon steels. These works have focused on the development of alloys with lower
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/02/2010