Results 21 to 30 of about 12,687,266 (297)

Quantum (q, h)-Bézier surfaces based on bivariate (q, h)-blossoming

open access: yesDemonstratio Mathematica, 2019
We introduce the (q, h)-blossom of bivariate polynomials, and we define the bivariate (q, h)-Bernstein polynomials and (q, h)-Bézier surfaces on rectangular domains using the tensor product.
Jegdić Ilija   +2 more
doaj   +1 more source

Mutual influence of cross hatch angle and superficial roughness of honed surfaces on friction in ring-pack tribo-system [PDF]

open access: yes, 2013
The cylinder bore surface texture, widely produced by the honing technique, is an essential factor for a good engine performance (friction, oil consumption, running-in, wear etc.).
EL MANSORI, Mohamed   +3 more
core   +1 more source

A Class of Weingarten Surfaces in Euclidean 3-Space

open access: yesAbstract and Applied Analysis, 2013
The class of biconservative surfaces in Euclidean 3-space 𝔼3 are defined in (Caddeo et al., 2012) by the equation A(grad H)=-H grad H for the mean curvature function H and the Weingarten operator A.
Yu Fu, Lan Li
doaj   +1 more source

Steady streaming confined between three-dimensional wavy surfaces [PDF]

open access: yes, 2010
We present a theoretical and numerical study of three-dimensional pulsatile confined flow between two rigid horizontal surfaces separated by an average gap h, and having three-dimensional wavy shapes with arbitrary amplitude σ h where σ ∼ O(1), but long ...
Plouraboué, Franck   +5 more
core   +1 more source

New examples of surfaces in H³ with conformal normal Gauss map

open access: yesAnais da Academia Brasileira de Ciências, 2006
In this paper we give some examples of surfaces in H³ with conformal normal Gauss map with respect to the second conformal structure and prove some global properties.Neste trabalho, damos alguns exemplos de superfícies no espaço hiperbólico de dimensão ...
Shuguo Shi
doaj   +1 more source

Revealing the role of interfacial water and key intermediates at ruthenium surfaces in the alkaline hydrogen evolution reaction

open access: yesNature Communications, 2023
Ruthenium exhibits comparable or even better alkaline hydrogen evolution reaction activity than platinum, however, the mechanistic aspects are yet to be settled, which are elucidated by combining in situ Raman spectroscopy and theoretical calculations ...
Xing Chen   +11 more
doaj   +1 more source

The Five Ws (and one H) of Super-Hydrophobic Surfaces in Medicine

open access: yesMicromachines, 2014
Super-hydrophobic surfaces (SHSs) are bio-inspired, artificial microfabricated interfaces, in which a pattern of cylindrical micropillars is modified to incorporate details at the nanoscale.
Francesco Gentile   +5 more
doaj   +1 more source

The evolution of H-surfaces with a Plateau boundary condition

open access: yesAnnales de l'Institut Henri Poincaré C, Analyse non linéaire, 2015
In this paper we consider the heat flow associated to the classical Plateau problem for surfaces of prescribed mean curvature. To be precise, for a given Jordan curve \Gamma \subset \mathbb{R}^{3} , a given prescribed mean curvature function H:\mathbb{R}^{3 ...
Frank Duzaar, Christoph Scheven
openaire   +3 more sources

Calabi–Yau threefolds and moduli of abelian surfaces I [PDF]

open access: yes, 2001
We describe birational models and decide the rationality/unirationality of moduli spaces $\cal A$d (and $\cal A$levd) of (1, d)-polarized Abelian surfaces (with canonical level structure, respectively) for small values of d.
Sorin Popescu   +3 more
core   +1 more source

Nanopatterning by Molecular Self-assembly on Surfaces

open access: yesCHIMIA, 2013
The ability to pattern surfaces down to the nanoscale is of increasing importance in nanoscience research. The use of supramolecular chemistry to drive the formation of self-assembled networks allows for a bottom-up approach to achieve ...
Thomas R. Eaton   +3 more
doaj   +1 more source

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