Results 41 to 50 of about 4,821 (295)

The Modeling of Concentrators for Solar Photovoltaic Systems

open access: yesEnergies
Concentrating photovoltaic (CPV) systems have emerged as a transformative technology that incorporates radiation concentrators into the photovoltaic system to enable radiation to be concentrated onto a receiver—the solar cells.
Ana Francisca Machado da Costa   +4 more
doaj   +1 more source

Quantum limits of ballistic electrical and thermal resistances of semiconductors [PDF]

open access: yesAIP Advances
The importance of electrical contact resistance and thermal boundary resistance has increased dramatically as devices are scaled to atomic limits. The use of a rich range of materials with various bandstructures (e.g., parabolic and conical) and in ...
Alice Ho   +4 more
doaj   +1 more source

Numerical Study of Baroclinic Acoustic Streaming Phenomenon for Various Flow Parameters

open access: yesEnergies, 2022
The article presents a numerical study of the large-amplitude, acoustically-driven streaming flow for different frequencies of the acoustic wave and different temperature gradients between hot and cold surfaces.
Błażej Baran   +3 more
doaj   +1 more source

POISSON GEOMETRY OF PARABOLIC BUNDLES ON ELLIPTIC CURVES [PDF]

open access: yesInternational Journal of Mathematics, 2008
The moduli space of G-bundles on an elliptic curve with additional flag structure admits a Poisson structure. The bivector can be defined using double loop group, loop group and sheaf cohomology constructions. We investigate the links between these methods and for the case SL2 perform explicit computations, describing the bracket and its leaves in ...
openaire   +4 more sources

PARABOLIC GEOMETRIES ASSOCIATED WITH DIFFERENTIAL EQUATIONS OF FINITE TYPE [PDF]

open access: yes, 2005
We present here classes of parabolic geometries arising naturally from Seashi’s principle to form good classes of linear differential equations of finite type, which generalize the cases of second and third order ODE for scalar function.
Yatsui, Tomoaki, Yamaguchi, Keizo
core   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat   +7 more
wiley   +1 more source

An Incompressible, Depth-Averaged Lattice Boltzmann Method for Liquid Flow in Microfluidic Devices with Variable Aperture

open access: yesComputation, 2015
Two-dimensional (2D) pore-scale models have successfully simulated microfluidic experiments of aqueous-phase flow with mixing-controlled reactions in devices with small aperture.
Artin Laleian   +2 more
doaj   +1 more source

Objective-free excitation of quantum emitters with a laser-written micro parabolic mirror

open access: yesAPL Photonics, 2020
The efficient excitation of quantum sources such as quantum dots or single molecules requires high numerical aperture optics, which is often a challenge in cryogenics or in ultrafast optics.
Sergii Morozov   +4 more
doaj   +1 more source

Explicit Analytic Solutions for the Subsurface Stress Field in Single Plane Contacts of Elastically Similar Truncated Cylinders or Wedges

open access: yesApplied Mechanics, 2022
As has been pointed out recently, a possible solution strategy to the wear–fatigue dilemma in fretting, operating on the level of contact mechanics and profile geometries, can be the introduction of “soft” sharp edges to the contact profiles, for example,
Emanuel Willert
doaj   +1 more source

On point orbits of the Co2-minimal parabolic geometry

open access: yesJournal of Combinatorial Theory, Series A, 2004
In [Eur. J. Comb. 5, 59--91 (1984; Zbl 0574.20012)] \textit{M. Ronan} and the reviewer introduced a rank three minimal parabolic geometry for \(Co_2\). In this paper the authors investigate the point-line collinearity graph of this geometry. They gather a lot of results, among them the \(H\)-orbits of subgroups of \(Co_2\) isomorphic to \((2^{1+6 ...
Peter Rowley, Louise Walker
openaire   +3 more sources

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