Results 11 to 20 of about 12,112,702 (317)
Mechanism of Antioxidant Activity of Betanin, Betanidin and Respective C15-Epimers via Shape Theory, Molecular Dynamics, Density Functional Theory and Infrared Spectroscopy [PDF]
Molecules, 2022 Betanin and betanidin are compounds with extensive interest; they are effectively free radical scavengers. The present work aims to elucidate the differences between the mechanism of the antioxidant activity of betanin, betanidin, and their respective ...
Iliana María Ramirez-Velasquez +3 more
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Journal of Mathematical Sciences, 2021 Shape theory was founded by K.~Borsuk 50 years ago. In essence, this is spectral homotopy theory; it occupies an important place in geometric topology. The article presents the basic concepts and the most important, in our opinion, results of shape theory.
P. S. Gevorgyan
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Shape theory intrinsically [PDF]
Publicacions Matemàtiques, 1993 We prove in this paper that the category HM whose objects are topological spaces and whose morphisms are homotopy classes of multi-nets is naturally equivalent to the shape category Sh. The description of the category HM was given earlier in the article "
Cerin, Zvonko
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Geometric moment-based spectral descriptors for robust non-rigid 3D shape analysis [PDF]
Scientific ReportsNumerous 3D shape descriptors have been proposed in recent years, among which spectral descriptors have gained significant prominence. However, widely used spectral signatures, such as the Heat Kernel Signature (HKS), Scale-Invariant HKS (SIHKS), and ...
Dan Zhang +4 more
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Shape fibrations and strong shape theory
Topology and its Applications, 1982 AbstractThe notion of shape fibration was introduced by Mardešić and Rushing. In this paper we use ‘fibrant space’ techniques in strong shape theory to prove that every shape fibration p:E → B of compact metric spaces is contained in a map of fibrant spaces p′:E′→B′ which enjoys a certain lifting property and whose homotopy properties reflect the ...
F. Cathey
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Shape theory for $C^*$-algebras.
MATHEMATICA SCANDINAVICA, 1985 In this very interesting paper the author introduces a ''non-commutative shape theory'' that is a shape theory for \(C^*\)-algebras which restricts to topological shape theory of Borsuk. His theory applies to some \(C^*\)-algebras which are not covered by a previous paper of Effros and Kaminker.
B. Blackadar
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Tsukuba Journal of Mathematics, 1985 The author developes a fiber shape theory for maps between metric spaces based on the Mardešić-Segal approach, usually called the inverse system approach. Instead of ANR's the author defines a fiber preserving version of ANR's calling them ''absolute neighborhood fiber retracts'' (ANFR) as follows: Let B be a fixed space.
Tatsuhiko Yagasgki
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IMAGE AND SHAPE COMPARISON VIA MORPHOLOGICAL CORRELATION [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 A lot of image matching applications require image comparison to be invariant relative to intensity values variations. The Pyt’ev theory for Morphological Image Analysis (MIA) was developed based on image-to-shape matching with mosaic shape models ...
Y. V. Vizilter +2 more
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Introduction to spectral line shape theory
Journal of Physics B: Atomic, Molecular and Optical Physics, 2022 Spectral line-shape models are an important part of understanding high-energy-density (HED) plasmas. Models are needed for calculating opacity of materials and can serve as diagnostics for astrophysical and laboratory plasmas.
T. Gomez +5 more
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Shape Shifting: Toward a Theory of Racial Change
Genealogy, 2022 We are accustomed to thinking of identities—racial, ethnic, often religious—as if they were permanent, unalterable features of individuals and groups.
Paul Spickard
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