Results 1 to 10 of about 95,022 (299)

Ordinal compactness [PDF]

open access: yesFilomat, 2020
We introduce a new covering property, defined in terms of order types of sequences of open sets, rather than in terms of cardinalities. The most general form depends on two ordinal parameters. Ordinal compactness turns out to be a much more varied notion than cardinal compactness.
Lipparini, Paolo, Lipparini, P
openaire   +6 more sources

Shape phenotype of thigh fat and muscle and risk of major adverse cardiovascular events after fragility hip fracture

open access: yesJournal of Cachexia, Sarcopenia and Muscle
Background Although sarcopenia has been recognized as a predictor of mortality in elderly patients with hip fracture, the association of thigh fat and muscle with cardiovascular (CV) outcome remains unclear. We examined the impact of computed tomography (
Sheen‐Woo Lee   +2 more
doaj   +1 more source

Topological approach to analyzing compactness and connectivity of settlement systems considering terrain constraints (case study of the Saratov Region) [PDF]

open access: yesИзвестия Саратовского университета. Новая серия: Серия Науки о Земле
The article examines the application of topological concepts for analysing the structure and assessing the compactness of a regional settlement system.
Danilov, Vladimir Anatolievich   +2 more
doaj   +1 more source

Evaluation of concrete mechanical strength through porosity

open access: yesMateriales de Construccion, 2004
The increasing on voids or pores in any material - if the rest of characteristics remains equal -always causes a decrease in their mechanical strength since the ratio volume/resistant mass is lower Following all these fact a well known conclusion rises ...
M. Olivares   +3 more
doaj   +1 more source

Morfologia de agregados do solo avaliada por meio de análise de imagens Morphology of soil aggregates evaluated by images analysis

open access: yesRevista Brasileira de Ciência do Solo, 2004
O uso intensivo do solo, aliado a condições inadequadas de manejo, concorre para a deterioração de suas propriedades físicas e isso se deve, principalmente, às modificações em sua estrutura.
N. Olszevski   +5 more
doaj   +1 more source

Compactness in the endograph uniformity

open access: yesApplied General Topology
Given a uniform space (X,U), we denote by F*(X) to the family of fuzzy sets u in (X,U) such that u is normal and upper semicontinuous. Let UE be the endograph uniformity on F*(X).
Iván Sánchez
doaj   +1 more source

Monocular reconstruction of shapes of natural objects from orthographic and perspective images

open access: yesFrontiers in Neuroscience
Human subjects were tested in perception of shapes of 3D objects. The subjects reconstructed 3D shapes by viewing orthographic and perspective images.
Mark Beers, Zygmunt Pizlo
doaj   +1 more source

Compact orthoalgebras [PDF]

open access: yesProceedings of the American Mathematical Society, 2005
We initiate a study of topological orthoalgebras (TOAs), concentrating on the compact case. Examples of TOAs include topological orthomodular lattices, and also the projection lattice of a Hilbert space. As the latter example illustrates, a lattice-ordered TOA need not be a topological lattice.
openaire   +3 more sources

Effect of Laser Remelting Treatment on Microstructure and Properties of Aluminum Alloy Micro-arc Oxidation Coatings

open access: yesCailiao gongcheng, 2018
The coating was treated by laser with different power. Microstructures of two kinds of coatings were examined by scanning electron microscopy(SEM). The phase of two kinds of coatings was detected by X-ray diffraction(XRD).
TANG Shi-guang   +5 more
doaj   +1 more source

Compactness of the Complex Green Operator on C1 Pseudoconvex Boundaries in Stein Manifolds

open access: yesMathematics
We study compactness for the complex Green operator Gq associated with the Kohn Laplacian □b on boundaries of pseudoconvex domains in Stein manifolds. Let Ω⋐X be a bounded pseudoconvex domain in a Stein manifold X of complex dimension n with C1 boundary.
Abdullah Alahmari   +4 more
doaj   +1 more source

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