Results 31 to 40 of about 6,019,713 (343)

Superconductivity at 93 K in a new mixed-phase Yb-Ba-Cu-O compound system at ambient pressure.

open access: yesPhysical Review Letters, 1987
A stable and reproducible superconductivity transition between 80 and 93 K has been unambiguously observed both resistively and magnetically in a new Y-Ba-Cu-O compound system at ambient pressure.
Maw‐Kuen Wu   +8 more
semanticscholar   +1 more source

Modelling fire smoke dynamics in a stairwell of high-rise building: Effect of ambient pressure

open access: yesCase Studies in Thermal Engineering, 2022
In a high-rise building fire, vertical shafts are the main paths for hot smoke to spread to multiple floors, posing a significant fire hazard. In this work, the large eddy simulation (LES) was applied to simulate smoke dynamics in a full-scale stairwell ...
Junjiang He   +5 more
doaj   +1 more source

The pressure moments for two rigid spheres in low-Reynolds-number flow [PDF]

open access: yes, 1993
The pressure moment of a rigid particle is defined to be the trace of the first moment of the surface stress acting on the particle. A Faxén law for the pressure moment of one spherical particle in a general low-Reynolds-number flow is found in terms of ...
Brady, J. F.   +2 more
core   +1 more source

Deconvolution of alpha spectra from air filters applied for measurements of the short-lived radon progeny concentration

open access: yesNukleonika, 2017
The paper contains a description of a method for the analysis of the complex alpha spectra generated during the measurement of the activity of filters outside of a vacuum chamber under environmental conditions.
Skubacz Krystian
doaj   +1 more source

Nanocrystals with metastable high-pressure phases under ambient conditions

open access: yesScience, 2022
The ambient metastability of the rock-salt phase in well-defined model systems comprising nanospheres or nanorods of cadmium selenide, cadmium sulfide, or both was investigated as a function of composition, initial crystal phase, particle structure ...
Tianyuan Xiao   +11 more
semanticscholar   +1 more source

Laser Welding under Vacuum: A Review

open access: yesApplied Sciences, 2017
Laser welding has been widely used in various industry fields. In order to further alter and broaden its applicability, a novel technology of laser welding under vacuum is introduced.
Meng Jiang, Wang Tao, Yanbin Chen
doaj   +1 more source

On the effect of the atmosphere on the evaporation of sessile droplets of water [PDF]

open access: yes, 2009
An experimental and theoretical study into the effect of the atmosphere on the evaporation of pinned sessile droplets of water is described. The experimental work investigated the evaporation rates of sessile droplets in atmospheres of three different ...
David, S.   +4 more
core   +1 more source

Effects of ambient pressure on flame spread speed along a fuel droplet array at microgravity

open access: yesNihon Kikai Gakkai ronbunshu, 2017
Microgravity experiments of flame spread along a fuel droplet array were performed to examine the effect of ambient pressure on the flame spread speed. The purpose of this research is to investigate growth mechanism of group combustion of fuel droplets ...
Yusuke SUGANUMA   +3 more
doaj   +1 more source

Effect of ambient pressure on propagation characteristics and laws of air blast waves

open access: yesAIP Advances, 2021
It is important to study the effect of ambient pressure on air blasts, and the explosion process of TNT explosives was calculated by using the AutoDyn-2D software in this paper.
Fei Deng   +3 more
doaj   +1 more source

Highly responsive ground state of PbTaSe$_2$: structural phase transition and evolution of superconductivity under pressure [PDF]

open access: yes, 2017
Transport and magnetic studies of PbTaSe$_2$ under pressure suggest existence of two superconducting phases with the low temperature phase boundary at $\sim 0.25$ GPa that is defined by a very sharp, first order, phase transition.
Besser, Matthew   +15 more
core   +5 more sources

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