Long Range Forces
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Effect of cold-working process on cyclic deformation of electrolytic copper
Abstract Cyclic softening and hardening processes are expressed by the change in the stress amplitude necessary to cause a given strain amplitude. Understanding the cyclic stress-strain behavior of materials is an important step in the complex study of their fatigue behavior. The potential differences between the defect structures of cold-formed materials ma
REM, Int. Eng. J.. Publicado em: 19/06/2019
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2. Wear of double crown systems: electroplated vs. casted female part
OBJECTIVES: The wear of telescopic crowns is a common problem often reducing the patient's satisfaction with the denture and resulting in a renewal of the denture. The study aims to compare the wear behavior of conical crowns using electroplated copings (group E ) with standard telescopic crowns with cast female parts (group C). MATERIAL AND METHODS: 10 coni
Journal of Applied Oral Science. Publicado em: 2012-06
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3. Fresamento do aço vhsuper nos estados recozido e temperado com metal duro e cermet
The concept of costs reduction in all the industrial processes has been continually developed aiming to make companies more competitive. In the dies and moulds production chain this concern is not different. Usually, dies and moulds require long machining and polishing times, which represent from 60 to 80% of the production cost. This work aims to investigat
Publicado em: 2007
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4. Propriedades de equilÃbrio e de transporte da matÃria de vÃrtices em nanoestruturas supercondutoras
In the present thesis, we study theoretically the equilibrium properties and dynamics of the vortex matter in two classes of nanostructured superconductors: (i) mesoscopic samples, with dimensions comparable with the penetration depth; and (ii) films with periodic array of artificial traps. In both cases, the vortex lattice symmetry is strongly dependent on
Publicado em: 2007
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5. Efeitos de superfície nas propriedades térmicas e dinâmicas de filmes de cristais líquidos esméticos. / Surface effects on the thermal and dynamical proprieties of smectic liquid crystal filmes.
The thermal and dynamical properties of free-standing films are strongly dependent on the boundary conditions and the presence of an external field. Using distinct theoretical models and the dynamic light scattering experimental setup, we study the surface and external field effects on the relaxation dynamics, fluctuation-induced interaction energy, and phas
Publicado em: 2007
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6. DESENVOLVIMENTO DE TRANSDUTORES A FIBRA ÓPTICA PARA COMPLETAÇÃO INTELIGENTE DE POÇOS / DEVELOPMENT OF OPTICAL FIBER TRANSDUCERS FOR INTELLIGENT WELL COMPLETION
Optical fibers are finding a growing range of new applications in the petroleum industry, which include, not only those already well established in telecommunications, but also in novel sensing technologies. Possibility of dense multiplexing, continuous distributed measurements, long distances between measurement points and electronic circuits, and explosion
Publicado em: 2004
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7. Stereo-hydrophobic potential and topological properties in the protein folding / "Potencial estéreo-hidrofóbico e propriedades topológicas no enovelamento de proteínas".
The understanding of the basic principles of the protein folding process may lead to very important applications. Although all significant aspects of this problem are not yet known, experimental and theoretical results have given important contribution on the subject, as, for instance, about the dominant role of the hydrophobic forces. In order to contribute
Publicado em: 2003
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8. Estados críticos orientacionais em cristais líquidos liotrópicos induzidos por campos magnéticos. / Orientations critical states in lyotropic liquid crystals induced by magnetic fields.
Liquid crystalline structures are found in materials made from molecules which are anisotropic in shape; such material are characterized mainly by a long range orientational order. In the nematic phase, the rodlike molecules tend to align parallel to each other. The average orientation defines a unit vector, called director n. Lyotropic liquid crystals are u
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2000
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9. Dinamica não linear e interações de defeitos topologicos e solitons na presença de forças externas e impurezas
We study the catastrophes that can occur in kink dynamics in the presence of external forces and impurities. Under the action of some anharmonic forces it can occurs that not only the translational mode is unstable but also the internal modes ( shape modes) or even part of the continuum spectrum ( the soliton is unstable against the interaction with phonons!
Publicado em: 1999
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10. Atomic-level accuracy in simulations of large protein crystals.
Proper treatment of long-range Coulombic forces presents a major obstacle to providing realistic molecular dynamics simulations of macromolecules. Traditional approximations made to lessen computational cost ultimately lead to unrealistic behavior. The particle mesh Ewald method accommodates long-range Coulombic forces accurately and efficiently by use of fa
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11. Adhesion of the positively charged bacterium Stenotrophomonas (Xanthomonas) maltophilia 70401 to glass and Teflon.
Medical implants are often colonized by bacteria which may cause severe infections. The initial step in the colonization, the adhesion of bacteria to the artificial solid surface, is governed mainly by long-range van der Waals and electrostatic interactions between the solid surface and the bacterial cell. While van der Waals forces are generally attractive,
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12. Polymeric amphiphiles at solid-fluid interfaces: Forces between layers of adsorbed block copolymers
Block copolymers are macromolecular amphiphiles and as such have a wide variety of interesting interfacial behavior. We present here a case of block copolymer adsorption from solution studied by the direct measurement of forces between two adsorbed layers. The case is polystyrene (PS)-poly(2-vinylpyridine) (PVP) adsorbed on mica from toluene. Under these cir