Results 41 to 50 of about 929 (179)

THE PROCESSING OF HYPERBOLOID SURFACES USING WIRE ELECTRICAL DISCHARGE MACHINING – THEORETICAL ASPECTS

Nonconventional Technologies Review, 2018
The paper presents an original method that can be used for cutting hyperboloid surfaces using wire electrical discharge machining (WEDM). The processing method, which has only been partly revealed by the author in certain relatively low-impact Romanian ...
Calin Denes
doaj  

Comparison of discharge mechanism of negative corona between hyperboloid and hemispherical electrodes

AIP Advances, 2018
Electrostatic precipitators based on corona discharge are a research hotspot in recent years. It is of great significance to investigate the characteristics of corona discharge under different system parameters for improving the dust removal efficiency ...
B. X. Lu, J. J. Zhu
doaj   +1 more source

Superintegrability on the two-dimensional hyperboloid [PDF]

Journal of Mathematical Physics, 1997
In this work we examine the basis functions for classical and quantum mechanical systems on the two-dimensional hyperboloid that admit separation of variables in at least two coordinate systems. We present all of these cases from a unified point of view. In particular, all of the special functions that arise via variable separation have their essential
Kalnins, E. G., Miller, W. jun., Pogosyan, G. S.   +2 more
openaire   +1 more source

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

Design of Hyperboloid Structures [PDF]

Journal of Architectural Research and Development, 1970
In the research into helium  mass  spectrometer leakage detection, a method for linearizability investigation has been put forward recently. Meanwhile,  it  has  been demonstrated the rationality of the method through multiple tests based on the study in the principle of constant pumping speed of the mechanical pump in vacuum.
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

Provable properties of asymptotic safety in f(R) approximation

Journal of High Energy Physics, 2022
We study an f(R) approximation to asymptotic safety, using a family of non-adaptive cutoffs, kept general to test for universality. Matching solutions on the four-dimensional sphere and hyperboloid, we prove properties of any such global fixed point ...
Alex Mitchell, Tim R. Morris, Dalius Stulga   +2 more
doaj   +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

3D geometric modelling and clinical validation of lower limb and preliminary 2‐year post‐operative clinical outcomes of neutral boundary alignment in total knee arthroplasty

Journal of Experimental Orthopaedics, Volume 13, Issue 1, January 2026.
Abstract Purpose To introduce a novel three‐dimensional (3D) modelling concept for lower limb alignment in total knee arthroplasty (TKA), termed neutral boundary alignment (NBA) and to present preliminary clinical data supporting this physics‐based custom alignment strategy.
Bruno Violante, Lorenzo Deveza, Francesco Pollara, Giovanni Rusconi, Gianroberto Ferreri, Alessandro Annibaldi, Ilwhan Park   +6 more
wiley   +1 more source

Different Transient Phenomena at the Edges of Traveling Foreshocks

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Past kinetic simulations and spacecraft observations have shown that traveling foreshocks (TFs) are bounded by either foreshock compressional boundaries (FCBs) or foreshock bubbles (FBs). Here we present four TFs with a different kind of structure appearing at one of their edges.
Primož Kajdič, Xochitl Blanco‐Cano, Diana Rojas‐Castillo, Nojan Omidi   +3 more
wiley   +1 more source