Results 81 to 90 of about 607,497 (301)

Some Classes of Topological Spaces with Unique Quasi-Uniformity

open access: yes, 1986
We follow P. Fletcher and W. F. Lindgren's work in the study of topological spaces with a unique quasi-uniformity by generalizing some of their results and constructing larger classes of uqu spaces which contain some of their examples as a particular ...
V. Gregori, J. Ferrer
core   +1 more source

Ultrasmall High‐Entropy Materials: Nanoscale Effects, Synthesis, and Mechanistic Insights

open access: yesAdvanced Functional Materials, EarlyView.
This review article focuses on sub‐10 nm high‐entropy materials that combine nanoscale design with complex compositions for next‐generation applications. ABSTRACT Ultrasmall high‐entropy nanomaterials (USHENMs, <10 nm) merge multicomponent chemistry with size‐dependent effects, forming a distinct class of materials with unprecedented properties.
Yueyue He   +5 more
wiley   +1 more source

Transition from rectification to resistive-switching in Ti/MgF2/Pt memory

open access: yesAIP Advances, 2019
Magnesium fluoride is a promising candidate for resistive-switching random access memory (RRAM) with biodegradable property. However, the underlying resistive-switching (RS) mechanism and conduction mechanism in MgF2 material is still not fully studied ...
Yi Sun   +6 more
doaj   +1 more source

Planar Quasi-Isotropic Magnetic Dipole Antenna Using Fractional-Order Circular Sector Cavity Resonant Mode

open access: yesIEEE Access, 2017
The radiation behavior of the fractional-order, resonant mode within a circular sector cavity radiator is revealed at first, and then, it is employed to design a novel, planar quasi-isotropic magnetic dipole antenna.
Qing Li   +3 more
doaj   +1 more source

Quasi-uniform Structures in Linear Lattices

open access: yesRocky Mountain Journal of Mathematics, 1993
This paper concerns normed linear spaces defined over the field of real numbers. The authors call a normed lattice in which the parallelogram law holds for positive elements an \(E\) space, and they call a nonnegative sublinear function \(q\) a quasi-norm provided that if \(q(x)= q(-x)= 0\) then \(x= 0\).
Ferrer, J., Gregori, V., Alegre, C.
openaire   +3 more sources

Convexity in quasi-metric spaces

open access: yes, 2012
Includes abstract.Includes bibliographical references.The principal aim of this thesis is to investigate the existence of an injective hull in the categories of T-quasi-metric spaces and of T-ultra-quasi-metric spaces with nonexpansive ...
Otafudu, Olivier Olela
core  

MXene Wrapped Magnetic Mesocrystals for Durable Redox Catalytic Cancer Therapy and Responsive MRI

open access: yesAdvanced Functional Materials, EarlyView.
Conformal wrapping of ultrathin Ti3C2Tx MXene nanosheets on Fe3O4 mesocrystals creates topology‐stabilized Schottky junctions that direct photoinduced electron transfer under NIR irradiation. The unique architecture sustains Fenton catalysis, promotes continuous hydroxyl radical production, and provides photo‐responsive MRI contrast.
Min Jun Ko   +10 more
wiley   +1 more source

Concerning completeness of the fine quasi-uniformity

open access: yes, 1996
[EN] A quasi-uniform space (X,U) is called strongly complete if every stable filter on (X, U-1) has a cluster point and it is called hypercomplete if every stable filter on (X,U) has a cluster point.
Romaguera Bonilla, Salvador   +1 more
core  

Twin Crystal Moiré Metasurfaces for Crossing Flat‐Band Transport

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces twin crystal moiré metasurfaces, breaking in‐plane symmetry to enable reconfigurable acoustic wave manipulation. By adjusting the twin angle and interlayer twist angle, various combinations of hyperbolic, flat bands, and elliptic states can be synthesized in the system.
Shida Fan   +9 more
wiley   +1 more source

Quasi-uniformities and quotients of paratopological groups

open access: yesFilomat, 2017
Summary: For a subgroup \(H\) of a paratopological group \(G\) we prove that the quotient topology of the coset space \(G/H\) is induced by a rotund quasi-uniformity and the quotient topology of the semiregularization \((G/H)_{sr}\) of \(G/H\) is induced by a normal quasi-uniformity.
Sánchez, Iván, Sanchis López, Manuel
openaire   +2 more sources

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