Results 71 to 80 of about 15,120 (245)

Numerical Integration of Slater Basis Functions Over Prolate Spheroidal Grids

Journal of Computational Chemistry, Volume 47, Issue 1, 05 January 2026.
Atom‐centered Slater functions are integrated over a prolate spheroidal grid, allowing the use of larger basis sets in correlated electronic structure computations. ABSTRACT Slater basis functions have desirable properties that can improve electronic structure simulations, but improved numerical integration methods are needed. This work builds upon the
Alexander Stark, Nathan Meier, Jeffrey Hatch, Joshua A. Kammeraad, Duy‐Khoi Dang, Paul M. Zimmerman   +5 more
wiley   +1 more source

THE HYPERBOLOID OF REVOLUTION OF ONE NAPPE A RULED SURFACE GENERATING CONICS

Journal of Industrial Design and Engineering Graphics, 2013
The paper intends to underline the property of the hyperboloid of revolution of one nappe to generate on its surface, when it is cut by a plane, the three known conics (ellipse, hyperbola and parabola).Cutting this surface by a plane, we find the ...
Gabriel Oprea, Ana Maria Mihaela Rugescu
doaj   +4 more sources

REGRESIÓN Y CORRELACIÓN DE SUPERFICIES ÓPTICAS DE REVOLUCIÓN EN FORMA CANÓNICA CONOCIDOS LOS RADIOS DE CURVATURA REGRESSÃO E CORRELAÇÃO DE SUPERFÍCIES ÓPTICAS DE REVOLUÇÃO EM FORMA CANÔNICA CONHECIDOS OS RÁDIOS DE CURVATURA REGRESSION AND CORRELATION OF OPTICAL SURFACES OF REVOLUTION IN CANONICAL FORM KNOWN THE RADII OF CURVATURE

Revista EIA, 2009
Se presentan tres modelos matemáticos para la regresión y correlación de una nube de N puntos en R3 con coordenadas cartesianas xj, yj como abscisas, con su respectiva ordenada ri como radio de curvatura de la sección axial o sagital, pero que no ...
Juan Camilo Valencia, Álvaro Hernán Bedoya   +1 more
doaj  

Ultraspinning limits and rotating hyperboloid membranes

Nuclear Physics B, 2016
We apply the hyperboloid membrane limit to the general Kerr-AdS metrics and their recently studied super-entropic cousins and obtain a new class of rotating black holes, for which the rotational parameters in multiple directions attain their maximal ...
Robie A. Hennigar, David Kubizňák, Robert B. Mann, Nathan Musoke   +3 more
doaj   +1 more source

The Casimir Energy for a Hyperboloid Facing a Plate in the Optical Approximation

, 2004
We study the Casimir energy of a massless scalar field that obeys Dirichlet boundary conditions on a hyperboloid facing a plate. We use the optical approximation including the first six reflections and compare the results with the predictions of the ...
A. Scardicchio, A. Scardicchio, B. V. Derjagin, H. B. G. Casimir, H. Gies, M. Klein, O. Schröder, R. L. Jaffe, W. H. Press   +8 more
core   +1 more source

Construction of Hyperboloidal Initial Data [PDF]

, 2002
I describe the conformal method for constructing solutions of the hyperboloidal constraint equations as well as the conditions needed on the free data in order to have regularity up to boundary for the solutions to the constraint equations. A brief discussion of the Einstein evolution equations in the unphysical setting is given.
openaire   +2 more sources

Dual Optical Hyperbolicity of PdCoO2 and PdCrO2 Delafossite Single Crystals

Advanced Functional Materials, Volume 36, Issue 1, 2 January 2026.
In this work, the hyperbolic response of PdCoO₂ and PdCrO₂ delafossites is investigated for the first time. They exhibit dual hyperbolic regimes, one localized around a phonon absorption in the mid‐infrared spectral region, and the other extending into the visible range.
Salvatore Macis, Annalisa D'Arco, Eugenio Del Re, Lorenzo Mosesso, Maria Chiara Paolozzi, Vincenzo Stagno, Alexander McLeod, Yu Tao, Pahuni Jain, Yi Zhang, Fred Tutt, Marco Centini, Maria Cristina Larciprete, Chris Leighton, Stefano Lupi   +14 more
wiley   +1 more source

HYPERBOLIC SUSPENDED GREENHOUSES

Journal of Industrial Design and Engineering Graphics, 2022
Agriculture is one of the most important economical branches that supports and develops our society. With the increased surface allocated for the urban areas, in order to create more space for agriculture purposes, one idea is to look up. Therefore, the
Oana NECULAI, Irina IGNATESCU-MANEA, Ana – Maria TOMA, Liliana BODESCU   +3 more
doaj  

Quantization and spacetime topology

, 2003
We consider classical and quantum dynamics of a free particle in de Sitter's space-times with different topologies to see what happens to space-time singularities of removable type in quantum theory.
Ashtekar A, Bargmann V, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Eisenhart L P, Ellis G F R, Gazeau J-P, Gel'fand I M, Hawking S W, Heller M, Heller M, Isham C J, Jorjadze G, Jorjadze G, Kirillov A A, Lachièze-Rey M, Loll R, Plebanski J, Plyushchay M, Pontrjagin L, Reed M, Sally P J, Seahra S S, Senovilla J M M, Souriau J-M, Stephani H, Stone M H, Thurston W P, Thurston W P, Vilenkin N Ja, W odzimierz Piechocki, Wigner E, Wong M K F   +34 more
core   +1 more source

Coordinate‐ and Spacetime‐Independent Quantum Physics

Annalen der Physik, Volume 538, Issue 1, January 2026.
This article studies in the framework of quantum field theory in curved spacetime, if there exists a single zero‐rank‐tensor solution of a Klein‐Gordon PDE, being valid at once for the depicted spacetimes. The answer is shown to be affirmative, even for a class of such solutions having the standard applications in particle physics. ABSTRACT The concept
Viacheslav A. Emelyanov, Daniel Robertz
wiley   +1 more source