Rugosity
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Distribuição e abundância da malacofauna epibentônica no Parracho de Maracajaú, RN, Brasil
The mollusks present a great taxon variety and life habits in coral reefs being good environmental indicators. It is important to know the distribution pattern of the mollusks and the processes that influence it, so that disturbances in sea ecosystems could be monitored. The present study aims to accomplish the inventory and distribution of epibenthic mollus
Publicado em: 2008
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14. Avaliação da Tenacidade à Fratura e da Resistência à Fadiga de Dois Aços Utilizados em Eixos de Carros Torpedos
Fatigue and fracture of railway shafts are technical problems that have been treated in studies of mechanical behavior of materials. The pugh car shafts fracture during operation causes production losses and high cost to replace them. In this work, it has been studied the fracture toughness through CTOD parameter and the fatigue crack growth da / dNxΔK
Publicado em: 2008
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15. Influência do acabamento e polimento na resistência à flexão de uma cerâmica odontológica / Influence of finishing and polishing in the flexural resistence of feldspatic ceramic
The objective of this study was to evaluate the influence of two systems of finishing and polishing in the flexural resistance of feldspatic ceramic EX-3 (Noritake). Ceramic blocks with measures in compliance with ISO 6872/1995 were confectioned following the manufacturers instructions. After the confection of the blocks and attainment of natural glaze, the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2007
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16. Comparative behaviour in terms of wear and corrosion resistance of galvanized and zinc-iron coated steels
Materials degradation due to simultaneous chemical and mechanical effects may occur under a variety of conditions. Galvanized and zinc-iron electrodeposited steels are widely used to protect automobile bodies against corrosion. In such applications, it is important to investigate the electrochemical and tribological behaviour of the coatings, in order to und
Matéria (Rio de Janeiro). Publicado em: 2007-12
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17. Polimento de rochas ornamentais: um enfoque tribológico ao processo / Dimension stones polishing: a tribological approach
Este trabalho apresenta uma contribuição experimental cujo objetivo é fornecer elementos para o aprimoramento tecnológico das etapas de polimento de rochas ornamentais. Alguns aspectos da tribologia, ramo do conhecimento amplamente utilizado nas engenharias mecânica e de materiais, foram transferidos para o estudo do polimento de rochas ornamentais e su
Publicado em: 2007
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18. Investigação estrutural de filmes moleculares por microscopia de varredura por força / Structural Investigation of molecular films by scanning force microscopy
Molecular films constituted by ruthenium polypyridine complexes, triangular ruthenium acetate clusters, and polymetallated porphyrins have been systematically investigated, providing a wide range of functional interfaces for electronic devices, sensors, photoconversion and electrocatalytical cells. Such films have been generated by dip coating, drop casting
Publicado em: 2007
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19. Características estruturais de plantas determinam riqueza de espécies de formigas no Cerrado? / Do plant structural characteristics determine ant species richness in Cerrado?
Species diversity is affected by some processes that operate in several spatial scales. In local scale the biological and physical interactions are extremely important for the process of diversity determination. The aim of this study was investigate whether structural characteristics of trees, such as crown architecture, bark rugosity and size of the plant,
Publicado em: 2006
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20. Avaliação da adesão bacteriana em polímeros empregados na indústria de alimentos irradiados com cobalto 60 / Evaluation of the bacterial adhesion in polymers employed in the food industry irradiated with cobalt 60
The adhesion of Pseudomonas fluorescens ATCC 13525 to low density polyethylene after irradiation with 0, 5, 10, 20 and 25 kGy was evaluated by the technique of standard counting in plaques (SCP) and epifluorescense microscopy (MEF). It was found that, regardless of the dose of irradiation and the employed technique the adhesion did not exhibit significant di
Publicado em: 2006
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21. Abordagem analítica e caracterização de contato entre superfícies / Analysis and characterization of the contact between surfaces
The tact may be defined as the capacity of a body to locate the contact on its surface, to recognize shape of the contacting surface as well as the superficial rugosity. Usually analytical models are not able to describe the phenomenon properly. This work, proposes an approach for the contact form location between two bodies using the resultant signals analy
Publicado em: 2006
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22. Relation between sawing process and quality of sawed surfaces of ornamental granites / Relação entre processo de corte e qualidade de superfícies serradas de granitos ornamentais
The industry of ornamental and dimension stone can be improved by the global and integrated overview of stone properties and performance machines, equipment and insums. Although with excellent growth in production and exportation and great technological advance, the empirism predominates in the productive process, a practice that might leads to loses, failur
Publicado em: 2006
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23. Avaliação de partículas poliméricas como material suporte em reator anaeróbio de leito fluidizado no tratamento de fenol.
This work had as objective studies of the biofilms formation in polymerics particles used as material supports in anaerobic fluidized-bed reactors. Three polymerics supports were tested: polystyrene, PET and PVC, which suffered appropriate acid treatment, in way to provide them superficial characteristics as rugosity, porosity and favorable electric charge,
Publicado em: 2005
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24. SucessÃes e coexistÃncias do espaÃo campinense na sua inserÃÃo ao meio tÃcnico-cientÃfico-informacional: a feira de Campina Grande na interface desse processo
This paper is an attempt of Campina Grande urban space understanding, the one that claims for a new way however keeping a heritage of two preterits. Having understood that the updating space processes comprehe nsion has been facing the discernment of the city and its historicity, this paper has had as the initial thought the possibility of insertion of the c
Publicado em: 2003