Results 71 to 80 of about 43,795 (172)

Magnetic Phase Diagram of FeAs based superconductors [PDF]

open access: yesarXiv, 2008
The recently discovered high-temperature superconductivity in doped quaternary iron oxypnictides correlates experimentally with a magnetic instability. We have used first-principles calculations to determine a magnetic phase diagram of ReO$_{1-\delta}$FeAs (Re=La--Dy) as a function of the doping $\delta$, of the FeAs in-plane lattice constant $a$, and ...
arxiv  

Possible Kondo effect in the iron arsenides [PDF]

open access: yesarXiv, 2009
The normal state of the iron arsenides shows the poor metallic behavior mixed with strong magnetic fluctuations. In particular, some FeAs-1111 and FeAs-122 compounds show the linear-T dependence of susceptibility above the spin-density wave (SDW) transition and the logarithmic upturn of resistivity at low temperatures.
arxiv  

A density functional theory study of FeAs comparing LDA+U, GGA+U and hybrid functionals [PDF]

open access: yesarXiv, 2014
We use density functional theory within the local density approximation (LDA), LDA+U, generalized gradient approximation (GGA), GGA+U, and hybrid-functional methods to calculate the properties of iron monoarsenide. FeAs, which forms in the MnP structure, is of current interest for potential spintronic applications as well as being the parent compound ...
arxiv  

Determination of polar compounds by TLC-FID in refined and partially hidrogenated soja heated oils.

open access: yesGrasas y Aceites, 1997
The thermal degradation of oils and fats leads to the formation of polar compounds, which is the reason why their determination is adopted for the quality control of the oil and fat used in frying.
J. L. Cruzian   +2 more
doaj   +1 more source

TECHNOLOGICAL SCENARIOS TO THE DEMAND FOR SUGARCANE

open access: yesFuture Studies Research Journal: Trends and Strategies, 2012
From the first decade of the 2000s, it is clear that there is an increase in discussions involving sustainability, including the bioenergy issue, to which Brazil has drawn the attention due to advances in the ethanol industry.
Ana Paula Franco Paes Leme Barbosa   +1 more
doaj   +1 more source

Importações brasileiras de leite: impactos micro e macroeconômicos

open access: yesEconomia Aplicada, 2006
Nos anos 1990 houve mudanças significativas no setor agroindustrial do leite no Brasil. Dentre elas destacam-se: a desregulamentação do rigoroso controle estatal após 46 anos (1945-1991); o lançamento de novos produtos; a entrada de multinacionais; a ...
Dione Fraga dos Santos   +1 more
doaj  

O Processo de Offshoring Internacional Ocorre Apenas de Países Desenvolvidos para as Economias Emergentes?

open access: yesInternext: Revista Eletrônica de Negócios Internacionais, 2012
The offshoring business is booming and what was used by few US pioneers are now spreading through the world (Economist Intelligent Unit, 2006). It is a very new issue at least regarding the origin of the expression and related to services and, even a ...
Paulo Roberto Gião   +1 more
doaj   +1 more source

Development of Photogrammetric Methods of Stress Analysis and Quality Control [PDF]

open access: yesECONFC0211115:061,2002, 2003
A photogrammetric method of stress analysis has been developed to test thin, nonstandard windows designed for hydrogen absorbers, major components of a muon cooling channel. The purpose of the absorber window tests is to demonstrate an understanding of the window behavior and strength as a function of applied pressure.
arxiv  

IMPACT OF IMPLANT-RETAINED MANDIBULAR OVERDENURE ON ORAL MUCOSA – A FINITE ELEMENT ANALYSIS

open access: yesRomanian Journal of Oral Rehabilitation, 2020
Aim of the study This study aims to analyze the impact that the mandibular overdenture has on the underlying oral mucosa from the perspective of number of implants used in retention of the overdenture.
Sînziana Anca Butnaru Moldoveanu   +2 more
doaj  

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