Results 11 to 20 of about 5,300 (153)

Probing Surface-Mediated Electronic Coupling in Flat Hexagonal Phosphorus Nanostructures and Monolayer on Au(111). [PDF]

open access: yesSmall
Hexagonal phosphorus nanostructures and monolayer are grown on Au(111). The progressive formation of unoccupied electronic bands involving substrate mediated coupling between phosphorus atoms are observed and explained by combining scanning tunneling microscopy and ab initio calculations. Abstract Due to its diverse allotropes and intriguing properties,
Karn A   +7 more
europepmc   +2 more sources

On n-Dimensional Simplices Satisfying Inclusions S ⊂ [0, 1]n ⊂ nS

open access: yesМоделирование и анализ информационных систем, 2017
Let  \(n\in{\mathbb N}\),  \(Q_n=[0,1]^n.\) For a nondegenerate simplex  \(S\subset {\mathbb R}^n\), by  \(\sigma S\) we denote the homothetic image of  \(S\) with the center of homothety in the center of gravity of  \(S\) and ratio of homothety ...
Mikhail V. Nevskii, Alexey Y. Ukhalov
doaj   +1 more source

On a geometric approach to the estimation of interpolation projectors

open access: yesМоделирование и анализ информационных систем, 2023
Suppose $\Omega$ is a closed bounded subset of ${\mathbb R}^n,$ $S$ is an $n$-dimensional non-degenerate simplex, $\xi(\Omega;S):=$ min {$\sigma\geqslant 1: \Omega\subset \sigma S$}.
Mikhail V. Nevskii, Alexey Y. Ukhalov
doaj   +1 more source

On Some Problems for a Simplex and a Ball in Rn

open access: yesМоделирование и анализ информационных систем, 2018
Let \(C\) be a convex body and let \(S\) be a nondegenerate simplex in \({\mathbb R}^n\). Denote by \(\tau S\) the image of \(S\) under homothety with a center of homothety in the center of gravity of \(S\) and the ratio \(\tau\). We mean by \(\xi(C;S)\)
Mikhail V. Nevskii
doaj   +1 more source

All Pinched Hysteresis Loops Generated by (α, β) Elements: in What Coordinates They May be Observable

open access: yesIEEE Access, 2020
Two existing theorems for studying pinched hysteresis loops generated by nonlinear higher-order elements from Chua's table are reformulated, namely the generalized homothety theorem and the associated Loop Location Rule, specifying the coordinates where ...
Zdenek Biolek   +3 more
doaj   +1 more source

Gravitational Waves: Just Plane Symmetry [PDF]

open access: yes, 1999
We present some remarkable properties of the symmetry group for gravitational plane waves. Our main observation is that metrics with plane wave symmetry satisfy every system of generally covariant vacuum field equations except the Einstein equations. The
A. Petrov   +17 more
core   +3 more sources

Comparing multivariable uncertain model structures for data‐driven robust control: Visualization and application to a continuously variable transmission

open access: yesInternational Journal of Robust and Nonlinear Control, Volume 33, Issue 16, Page 9636-9664, 10 November 2023., 2023
Abstract The selection of uncertainty structures is an important aspect of system identification for robust control. The aim of this paper is to provide insight into uncertain multivariable systems for robust control. A unified method for visualizing model sets is developed by generating Bode plots of multivariable uncertain systems, both in magnitude ...
Paul Tacx, Tom Oomen
wiley   +1 more source

On Minimal Absorption Index for an n-Dimensional Simplex

open access: yesМоделирование и анализ информационных систем, 2018
Let  \(n\in{\mathbb N}\) and let \(Q_n\) be the unit cube \([0,1]^n\). For a nondegenerate simplex \(S\subset{\mathbb R}^n\), by \(\sigma S\) denote the homothetic copy of \(S\) with center of homothety in the center of gravity of \(S\) and ratio of ...
Mikhail V. Nevskii, Alexey Y. Ukhalov
doaj   +1 more source

The Geometry of (Super) Conformal Quantum Mechanics [PDF]

open access: yes, 1999
N-particle quantum mechanics described by a sigma model with an N-dimensional target space with torsion is considered. It is shown that an SL(2,R) conformal symmetry exists if and only if the geometry admits a homothetic Killing vector $D^a$ whose ...
Michelson, Jeremy, Strominger, Andrew
core   +5 more sources

Connaissance et métamorphoses de l’Iliade en Étrurie

open access: yesAitia, 2022
The author offers an itinerary through the images of the Trojan Cycle and the Iliad that arrived or were reinterpreted in Etruria between the ancient orientalizing period and the 4th century B.C.From the 7th century on, knowledge of the Greek epic (which
Françoise-Hélène Massa-Pairault
doaj   +1 more source

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