Arc Coupling
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Uma contribuição ao conhecimento da física do arco aplicada em soldagem / A contribution to the knowledge of arcs physics applied in welding
Conhecendo os fundamentos físicos que governam os processos de manufatura, é possível incrementar o desenvolvimento dos mesmos de uma forma mais rápida e eficiente. Isto se aplica também para soldagem. Porém, os fenômenos físicos que são envolvidos nos processos de soldagem não são tão esclarecidos, principalmente pela dificuldade em estudá-los
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
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2. 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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3. APLICACIÓN DE ELEMENTOS FINITOS DE INTERFACE A MODELOS DE MODOS MIXTOS DE FISURAS / MODELING OF MIXED MODE CRACKS IN MASONRY STRUCTURES USING INTERFACE FINITE ELEMENTS / APLICAÇÃO DE ELEMENTOS FINITOS DE INTERFACE À MODELAGEM DE MODOS MISTOS DE FISSURAÇÃO
Since masonry is a widely employed material, it is fundamental to better characterize its structural performance and extend its use beyond functional applications (separation of environments). In this work a finite element model for masonry structures is presented. By using a sophisticated numerical tool based on the finite element method, associated to suit
Publicado em: 1999
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4. Sintese total de (+)-cularina, (+)-sarcocapnina, (+)-sarcocapnidina (+)-crassifolina
The alkaloid (+)-cularine was isolated by Manske in 1938 from plants belonging to the genera Dicentra and Corydalis. Two altemative synthetic convergent routes were proposed by us to obtain the (±)-didehydronorcularine 290 and (±)-didehydronorisocularine 309 in the key step. The iminophosphorane 244 was prepared by a Staudinger reaction in 95% yield, or by
Publicado em: 1994
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5. Functional and Mutational Analysis of Conjugative Transfer Region 1 (Tra1) from the IncHI1 Plasmid R27
The conjugative transfer region 1 (Tra1) of the IncHI1 plasmid R27 was subjected to DNA sequence analysis, mutagenesis, genetic complementation, and an H-pilus-specific phage assay. Analysis of the nucleotide sequence indicated that the Tra1 region contains genes coding for mating pair formation (Mpf) and DNA transfer replication (Dtr) and a coupling protein
American Society for Microbiology.
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6. The projection structure of EmrE, a proton-linked multidrug transporter from Escherichia coli, at 7 Å resolution
EmrE belongs to a family of eubacterial multidrug transporters that confer resistance to a wide variety of toxins by coupling the influx of protons to toxin extrusion. EmrE was purified and crystallized in two dimensions by reconstitution with dimyristoylphosphatidylcholine into lipid bilayers. Images of frozen hydrated crystals were collected by cryo-electr
Oxford University Press.