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Now showing items 51-59 of 59
Restored quantum size effects of Pb overlayers at high coverages
(APS, 2007-04-10)
Abnormally large stability of Pb nanostructures grown on metallic or semiconductor substrates has been observed even for heights of about 30 monolayers. Using both density-functional theory calculations and analytical ...
Phenotypic and genotypic characterization of Streptococcus pyogenes isolates displaying the MLSB phenotype of macrolide resistance in Spain, 1999 to 2005
(2007-01-22)
The aim of this study was to describe the genetic characteristics of Streptococcus pyogenes showing the MLSB phenotype of macrolide resistance from 1999 to 2005 in Spain and to highlight the substantial increase in these ...
Positron lifetime calculation of the elements of the periodic table
(IOP, 2007-04-10)
Theoretical positron lifetime values have been calculated systematically for most of the elements of the periodic table. Self-consistent and non-self-consistent schemes have been used for the calculation of the electronic ...
Relationship between vegetation diversity and soil functional diversity in native mixed-oak forests
(Elsevier, 2007-05-22)
Most studies on the interactions between aboveground vegetation and belowground soil diversity have been carried out in microcosms or manipulated field plots. In the current study, we investigated the relationship between ...
Un índice hidrogeomorfológico (IHG) para la evaluación del estado ecológico de sistemas fluviales
(Universidad de Zaragoza, 2007)
La dinamica fluvial es la clave no solo del funcionamiento, sino tambien del valor ecologico, paisajistico y ambiental de los sistemas fluviales. Si se quiere conservar un rio como ecosistema y como corredor ambiental en ...
Synthesis and characterization of epoxy polymers containing azobenzene groups that exhibit optical birefringence
(2007-12-03)
A push–pull azo dye (DO3) was used as photosensitive substance to satisfactorily synthesize new epoxy polymers containing azo groups covalently linked. Three different amines BA, TA and MXDA were used as hardeners. Materials ...
Understanding and using the meaning of statements in a bio- ontology: recasting the Gene Ontology in OWL
(Springer Nature, 2007-02-20)
The bio-ontology community falls into two camps: first we have biology domain experts, who actually hold the knowledge we wish to capture in ontologies; second, we have ontology specialists, who hold knowledge about ...
Analysis and Characterization of the Behaviour of a Variable Geometry Structure
(SAGE, 2007-11)
The study about a variable geometry truss is presented. The first step is a kinematic design and later an analysis using the MSC/Adams code. Then, the finite-element method with the MSC/Nastran code was used to develop a ...
FEM Subsystem Replacement Techniques for Strength Problems in Variable Geometry Trusses
(Elsevier, 2007-12-01)
This work presents the application of a procedure for replacing FEM subsystems with a high number of dofs (possibility of including mobile internal parts) using equivalent parametric macroelements (EPMs) with a much reduced ...