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Mostrando ítems 21-30 de 79
Estágio da difusão das tecnologias da internet em organizações acadêmicas
(Encontro Nacional de Engenharia da Produção, 1998)
This study looks toward bringing to light the multiple aspects of the pattern of use of Internet in academic activities, according to a research model based on literature in the area and tested empirically. The field ...
Mössbauer effect study of a pleistocenic Brazilian fossil
(Springer, 1991-11)
Some preliminary Mössbauer effect results for a pleistocenic bone fossilized by mineralization process are presented. The presence of some iron-sulphur compounds permits to infer a correlation between the oxidation state ...
Phase transitions in antiferromagnetic superlattices
(American Physical Society, 1992-06-01)
We investigate the temperature dependence of the magnetization of films and superlattices of uniaxial antiferromagnets using a self-consistent, mean-field approach and apply the theory to FeF2/CoF2 superlattices. The number ...
Magnetic and transport properties of polycrystalline La0.7Sr0.3Mn1-xFexO3.
(American Physical Society, 2000-12-12)
The effect of Fe doping (<10%) on polycrystalline samples of La0.7Sr0.3MnO3 has been studied by means of x-ray diffraction, resistivity, ac susceptibility, magnetization, and magnetoresistance measurements. Fe doping does ...
Atomic hopping in AlCuFe quasicrystal
(Elsevier, 1996-03)
High temperature 57Fe MOsshaner effect measurements in annealed icosahedral A1CuFe
alloy are reported. The anomalous decrease in Debye-Waller factor is qualitatively
interpretated. It is suggested using consistent ...
Repercussões histopatológicas da colostomia no coto colônico distal desfuncionalizado: estudo experimental em ratos
(1999)
O objetivo deste trabalho foi evidenciar as repercussões histopatológicas da colostomia no segmento desfuncionalizado e, dessa forma, criar um modelo experimental da colite de derivação fecal (CO). Foram utilizados 65 ...
Magnetic behavior of thin rare-earth films
(American Physical Society, 1999-03-01)
We consider a thin rare-earth film with the c axis perpendicular to the surface, to study its nonuniform
magnetic structure induced by the lower coordination near the surfaces. The influence of a dc magnetic field,
applied ...
Density of sand flies (diptera: psychodidae) in domestic and wild animal shelters in an area of visceral leishmaniasis in the state of Rio Grande do Norte, Brazil
(Memorias do Instituto Oswaldo Cruz, 1999-08)
The objective of the present study was to determine the association of sand flies with the presence of
domestic and wild animals in the peridomiciliary area. The sand flies were collected using direct aspi-
ration and ...