Results 131 to 140 of about 1,563,307 (153)
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Some types of ring elements in Ore extensions over noncommutative rings
, 2017Let R be an associative unital ring with an endomorphism α and α-derivation δ. Some types of ring elements such as the units and the idempotents play distinguished roles in noncommutative ring theory, and will play a central role in this work.
E. Hashemi, M. Hamidizadeh, A. Alhevaz
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Design of a triple‐band metamaterial absorber using equivalent circuit model and interference theory
, 2018In this letter, an ultra‐thin triple‐band metamaterial absorber with high absorptivity in each band of operation is presented. The unit cell of the proposed structure consists of an outer circular metal ring and an inner Jerusalem cross on top of a thin ...
Xianliang Zeng +4 more
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Stable Anion Exchange Membrane Bearing Quinuclidinium for High-performance Water Electrolysis.
Angewandte ChemieAnion exchange membranes (AEMs) are core components in anion exchange membrane water electrolyzers (AEM-WEs). However, the stability of functional quaternary ammonium cations, especially under high temperatures and harsh alkaline conditions, seriously ...
Liqiang Yin +11 more
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, 2015
A new shaped backward wave periodic dual-star split-ring resonator (DSSRR) is proposed based on the equivalent transmission line theory. The proposed artificial DSSRR design structure produces a wide band from 7.5 to 9.5 GHz, and very high rejection (47 ...
M. H. Ullah +5 more
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A new shaped backward wave periodic dual-star split-ring resonator (DSSRR) is proposed based on the equivalent transmission line theory. The proposed artificial DSSRR design structure produces a wide band from 7.5 to 9.5 GHz, and very high rejection (47 ...
M. H. Ullah +5 more
semanticscholar +1 more source
, 2013
Normal and surface-enhanced Raman spectra for a set of substituted benzenethiols were measured experimentally and calculated from static polarizability derivatives determined with time-dependent density functional theory (TDDFT).
N. Valley +3 more
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Normal and surface-enhanced Raman spectra for a set of substituted benzenethiols were measured experimentally and calculated from static polarizability derivatives determined with time-dependent density functional theory (TDDFT).
N. Valley +3 more
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Stability and physical properties of a tri-ring based porous g-C4N3 sheet.
Physical Chemistry, Chemical Physics - PCCP, 2013Due to their porosity and biocompatibility, C-N based graphitic sheets are currently attracting much attention. Here we present our findings on a new structure of a g-C4N3 sheet composed of the tri-ring heptazine-like units, which is energetically more ...
Xiaowei Li, Shunhong Zhang, Qian Wang
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Liquid-core optical ring-resonator sensors.
Optics Letters, 2006We have demonstrated a novel sensor architecture based on a liquid-core optical ring-resonator (LCORR) in which a fused silica capillary is utilized to carry the aqueous sample and to act as the ring resonator.
I. White, Hesam Oveys, Xudong Fan
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Double Strain-Release [2π+2σ]-Photocycloaddition.
Journal of the American Chemical SocietyIn pursuit of potent pharmaceutical candidates and to further improve their chemical traits, small ring systems can serve as a potential starting point.
S. Dutta +10 more
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The diophantine theory of a ring of analytic functions.
, 1995We prove that the existential theories (in the language of rings augmented by a symbol for the independent variable and a predicate for the complex constants) of many of the commonly used rings of analytic functions are undecidable.
T. Pheidas
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