Arc Length
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Valoración del desempeño de un dispositivo de autoalimentación diseñado para la evaluación operativa de electrodos revestidos
The objective of the present work is to evaluate the effectiveness of a self-feed device for covered electrodes. This device is able of eliminate disturbances from manual operation or the use of automatic control systems during the study of covered electrode behavior. The conjugation of different methods like short-circuit time statistical analysis, metallog
Soldagem & Inspeção. Publicado em: 2009-03
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14. Avaliação da retenção de pinos de fibra de vidro reembasados (pinos anatomicos) e não reembasados cimentados em diferentes condições / Evaluation of relined (anatomic post) and non relined fiber glass posts retention cemented in different conditions
This study evaluated the effect of the relining (anatomic posts), of type cements and the length of the luting on the retention of fiber glass posts. One hundred and eighty bovine incisors were selected, their coronary portion removed, and the canals endodontically treated. After endodontic treatment, the canals were extended with diamonds burs nº 4138 and
Publicado em: 2009
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15. Avaliação de Processos GMAW Duplo-Arame em Baixa Corrente com Controle do Formato de Onda e com Auxílio de Feixe de Laser / Assessment of Low Current Tandem GMAW Processes with Waveform Control and with Aid of Laser Beam
In face of manufacturing-related limitations in the present-day industry, the welding sector has looked for new, or even not so new, processes. In other words, it has invested in the development of new processes and, especially, in the use of new arrangements for conventional processes. Thus, the aim of this work was to assess the use of combined processes a
Publicado em: 2009
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16. Estratigrafia e petrogênese das sequências vulcânicas paleoproterozóicas na região de São Félix do Xingu (PA), Província Mineral de Carajás / Stratigraphy and petrogenesis of the paleoproterozoic volcanic sequences in the São Félix do Xingu (PA) region, Carajás Mineral Province
Near the São Félix do Xingu city, centersouth portion of the Pará state, in the context of the Carajás Mineral Province, occur extensive Paleoproterozoic volcanoplutonism (1.88 1.87 Ga) exceptionally well-preserved and grouped in the Sobreiro and Santa Rosa formations. These suites are generically correlated to Uatumã Supergroup volcanoplutonism, a magm
Publicado em: 2009
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17. WELDABILITY ANALISES OF API 5L X-80 STEEL USING TEKKEN TEST AND IMPLANT TEST / ANÁLISE DA SOLDABILIDADE DO AÇO API 5L X-80 POR MEIO DOS TESTES TEKKEN E DE IMPLANTE
This work shows a study of the weldability of API 5L X-80 steel using the Tekken Test and the Implant Test. The research analises the weldability of HSLA X-80 steel for orbital circunferencial welding with the Shielded Metal Arc Weld and the Flux Core Arc Weld processes with regard to hydrogen induced cracking formation. The aim is to make feasible different
Publicado em: 2008
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18. Sensitivity analysis of secondary arc current for different transmission lines / Analise de sensibilidade da corrente de arco secundario para diferentes linhas de transmissão
The secondary arc appears in single-phase switching during clearing of non-permanent ground single-phase to ground faults. The problem happens especially on EHV lines, on aerial isolation, in faults with non permanent characteristics. In this work different transmission lines with voltage levels of 345 kV up to 765 kV and with 150 km up to 900 km length are
Publicado em: 2007
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19. Compartimentação do relevo do hemigráben do Estado de Roraima
The sedimentary basin of the Tacutu is located in the state of Roraima, Brazil. It is an implanted distensive segment in the Mesozóic (upper Jurassic - lower Cretaceo). It is an half-graben incased in the Shield of the Guianas, prolongated in the northeast direction - southwestern, with about 300 km of length varying 30 the 50 width km, extending itself of
Publicado em: 2007
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20. Effects of the geometrie, of the axial force and of the rotation in the friction welding repair / Efeitos da geometria, da força axial e da rotação no reparo por atrito
Interventions made in the oil industry for repairs in structures and mechanical components, represents nowadays high financial costs. It is even worse since the operations are made in explosion risk areas. The electric arc welding is one of the most common techniques in this kind of repair. However, this technique has many inconveniences, some of them are: h
Publicado em: 2007
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21. Desenvolvimento de procedimento utilizando processo de soldagem plasma para confecção de sementes de Iodo125 / Development of a procedure using plasma welding process to produce 125I seeds
The prostate cancer, which is the second cause of death by cancer in men, overcome only by lung cancer, is a problem of public health in Brazil. Brachytherapy is among the possible available treatments for prostate cancer, in which small seeds containing 125I radioisotope are implanted in the prostate. The seed consists of a titanium sealed capsule with 0.8
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2006
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22. AVALIAÇÃO DAS ALTERAÇÕES TRANSVERSAIS, ÂNTEROPOSTERIORES E VERTICAIS DA MAXILA EM PACIENTES SUBMETIDOS À EXPANSÃO RÁPIDA DA MAXILA ASSISTIDA CIRURGICAMENTE / Evaluation of the transversal alterations, antero -posterior of the dental and vertical arc of the palate in patients submitted to the rapid maxillary expansion surgically assisted.
The present work had to purpose evaluate the alterations produced in patients submitted to the fast expansion of maxilla by means of disjunction of the palatine suture median assisted surgically. The sample used to accomplish this study was composed of 34 pairs of models of 17 patients, being 6 of the masculine sex and 11 of the feminine sex. For each patien
Publicado em: 2006
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23. Aplicação da descrição cinemática co-rotacional na análise não-linear geométrica de estruturas discretizadas por elementos finitos de treliças, vigas e cascas / The application of the co-rotational kinematic description to the geometrically non-linear analysis of structures modeled by truss, beam and shell finite elements
The co-rotational formulation was used as the kinematic description to evaluate the geometrically non-linear behavior of different types of structures on a static analysis. Along the current research, it was aimed to demonstrate the basic concepts of the co-rotational approach that is based on the separation of the total motion into rigid body and deformatio
Publicado em: 2006
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24. Estudo de algoritmo de continuação aplicado a resposta não-linear em frequência / Study of path-following algorithm applied non-linear response frequency
O objetivo deste trabalho é estudar a aplicação do método "arc-length" em funções de resposta em frequência não-lineares (RFs), para se obter principalmente regiões instáveis do caminho de equilíbrio da curva de receptância ?(?). Para isto, é necessário conhecer os vários procedimentos de continuação existentes com o intuito de se escolher o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2005