Filippov
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Sistemas planares de Filippov e bifurcações genéricas de baixa codimensão / Planar Filippov systems and generic bifurcations of low codimension
Neste trabalho, abordamos aspectos geométricos e qualitativos da teoria de Sistemas Dinâmicos Suaves por Partes, mais especificamente a classe dos Sistemas Planares de Filippov. é feito um estudo sistemático das singularidades genéricas de um Sistema Planar de Filippov, bem como a noção de estabilidade estrutural local e uma classificação através d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/03/2012
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2. Phippov systems in tridimensional manifolds / Sistemas de Filippov em variedades tridimensionais
Neste trabalho sistemas dinâmicos descontínuos em variedades tridimensionais são estudados. Descrevemos uma classe de tais sistemas que são localmente estruturalmente estáveis em uma vizinhança de uma singularidade típica. Exibimos nessa etapa uma sub-família de campos do tipo dobra-dobra que é estruturalmente estável. Introduzimos os conceitos de
Publicado em: 2010
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3. Bifurcações de campos vetoriais descontínuos / Bifurcations of discontinuous vector fields
Let M be a connected and compact set of the plane which is the union of the connected subsets N and S. Let Z_L=(X_L,Y_L) be a one-parameter family of discontinuous vector fields, where X_L is defined on N and Y_L on S. The two fields X_L, Y_L and their dependences on L are smooths, i. e., are of C^\infty class; the discontinuity happens in the common boundar
Publicado em: 2009
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4. Study of dense plasma-surface interaction by a Filippov type plasma focus device
In this paper we have tried to investigate of dense plasma-material interaction in a Filippov type plasma focus (90KJ, 25KV, 288µf) facility. Dense plasma focus discharges are known as a remarkable source of hot plasma bunches and fast streams, fast neutrons, hard and soft X-rays, and energetic particles such as ions and electrons. The Aluminum made targets
Brazilian Journal of Physics. Publicado em: 2008-06
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5. X-ray and neutron emission studies in a new Filippov type plasma focus
We have performed experimental comparative studies of the x-ray and neutron emission generated by the new Filippov-type plasma focus "Dena", (90 kJ, 25 kV, 288muF) in the pressure range of 0.6-1 torr. Time-integrated and time-resolved detectors, together with an x-ray pin-hole camera, along with a Be filter of 10mum thickness have been used. For a working ga
Brazilian Journal of Physics. Publicado em: 2002-03
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6. Nitric oxide decreases stability of mRNAs encoding soluble guanylate cyclase subunits in rat pulmonary artery smooth muscle cells.
Nitric oxide stimulates soluble guanylate cyclase (sGC) to convert GTP to the intracellular second messenger cGMP. In rat pulmonary artery smooth muscle cells, sGC is an obligate heterodimer composed of alpha1 and beta1 subunits. We investigated the effect of NO donor compounds on sGC subunit gene expression in rat pulmonary artery smooth muscle cells. Sodiu
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7. Biochemical and Genetic Studies of the Initiation of Human Rhinovirus 2 RNA Replication: Purification and Enzymatic Analysis of the RNA-Dependent RNA Polymerase 3Dpol
The replication of human rhinovirus 2 (HRV2), a positive-stranded RNA virus belonging to the Picornaviridae, requires a virus-encoded RNA polymerase. We have expressed in Escherichia coli and purified both a glutathione S-transferase fusion polypeptide and an untagged form of the HRV2 RNA polymerase 3Dpol. Using in vitro assay systems previously described fo
American Society for Microbiology.
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8. Identification of an RNA Hairpin in Poliovirus RNA That Serves as the Primary Template in the In Vitro Uridylylation of VPg
The first step in the replication of the plus-stranded poliovirus RNA is the synthesis of a complementary minus strand. This process is initiated by the covalent attachment of UMP to the terminal protein VPg, yielding VPgpU and VPgpUpU. We have previously shown that these products can be made in vitro in a reaction that requires only synthetic VPg, UTP, poly
American Society for Microbiology.