Results 91 to 100 of about 74,207 (261)

The Impact of Quasi-Conformal Curvature Tensor on Warped Product Manifolds

open access: yesAxioms
This work investigates the effects on the factor manifolds of a singly warped product manifold resulting from the presence of a quasi-conformally flat, quasi-conformally symmetric, or divergence-free quasi-conformal curvature tensor.
Bang-Yen Chen   +4 more
doaj   +1 more source

Construction of an A-manifold on a principal torus bundle

open access: yes, 2012
We construct a new example of an A-manifold, i.e. a Riemannian manifold with a cyclic-parallel Ricci tensor, which can be viewed as a generalization of the Einstein condition.
Zborowski, Grzegorz
core   +1 more source

Revealing the Active State of a Cu/ZnO:Al Catalyst During Reverse Water–Gas Shift Reaction in an Operando Microwave Absorption Study

open access: yesAngewandte Chemie International Edition, EarlyView.
We investigated the transformations of an industrially relevant CuO/ZnO/Al2O3 pre‐catalyst during its activation and under operation in reverse water–gas shift reaction. Changes of the dielectric properties induced by H2, which acts as an electron donor and oxygen provided by CO2 acting as an electron sink are correlated with the catalytic yield, which
Zohreh Asadi   +3 more
wiley   +1 more source

On the topology of conformally compact Einstein 4-manifolds

open access: yes, 2003
In this paper we study the topology of conformally compact Einstein 4-manifolds. When the conformal infinity has positive Yamabe invariant and the renormalized volume is also positive we show that the conformally compact Einstein 4-manifold will have at ...
Chang, Alice, Qing, Jie, Yang, Paul
core  

Semantic primitives and compositionality: An Annual Review of Information Science and Technology (ARIST) paper

open access: yesJournal of the Association for Information Science and Technology, EarlyView.
Abstract The term semantic primitives refers to a set of basic, atomic concepts from which all other (compound) concepts are constructed. It presupposes the principle of compositionality—the idea that complex items or expressions can be formed by combining simpler constituents.
Birger Hjørland
wiley   +1 more source

Diffusion Coefficient and Viscosity of Methyl Viologen Electrolyte Estimation Based on a Kinetic Monte Carlo Computational Approach Coupled with the Mean Square Displacement Method

open access: yesBatteries &Supercaps, Volume 8, Issue 3, March 2025.
A novel and comprehensive 3D‐resolved kinetic Monte Carlo model coupled with mean square displacement analysis is introduced. This computational approach allows to explore, for the first time, the concentration and the state of charge effects on ionic diffusion coefficient and viscosity in methyl viologen‐based electrolytes used in organic redox flow ...
Jia Yu   +2 more
wiley   +1 more source

Tuning the Growth Pattern of Triangular Silver Nanoplates from Lateral to Vertical by Secondary Metal Addition

open access: yesChemPhysChem, Volume 26, Issue 6, March 15, 2025.
What happens, if in the synthesis of flat silver platelets, the slow deposition of silver along twinning faults is disturbed by the addition of a nobler metal? We have looked into it and found a way to fine‐tune the metal deposition in lateral and vertical direction.
Jonas Kluitmann   +3 more
wiley   +1 more source

Deuteron Quadrupole Coupling Constants and Reorientation Correlation Times of Cations in Amino Acid Ionic Liquids

open access: yesChemPhysChem, EarlyView.
Connecting structure and dynamics. The deuteron quadrupole coupling constants and reorientation correlation times of the acidic CH bond of imidazolium cations in amino acid ionic liquids are provided by using NMR property relationships and relaxation time experiments.
David Kotwica   +2 more
wiley   +1 more source

Super Quasi-Einstein Warped Products Manifolds with Respect to Affine Connections

open access: yesAxioms
In this paper, we investigate warped products on super quasi-Einstein manifolds under affine connections. We explore their fundamental properties, establish conditions for their existence, and prove that these manifolds can also be nearly quasi-Einstein ...
Mohd Vasiulla   +3 more
doaj   +1 more source

7D supersymmetric Yang-Mills on curved manifolds

open access: yesJournal of High Energy Physics, 2017
We study 7D maximally supersymmetric Yang-Mills theory on curved manifolds that admit Killing spinors. If the manifold admits at least two Killing spinors (Sasaki-Einstein manifolds) we are able to rewrite the supersymmetric theory in terms of a ...
Konstantina Polydorou   +2 more
doaj   +1 more source

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