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Æther as an Inevitable Consequence of Quantum Gravity

open access: yesUniverse, 2022
The fact that quantum gravity does not admit an invariant vacuum state has far-reaching consequences for all physics. It points out that space could not be empty, and we return to the notion of an æther.
Sergey Cherkas, Vladimir Kalashnikov
doaj   +1 more source

Design of optically pumped cesium beam tube with hexapole magnetic system for longer lifetime and better SNR

open access: yesFrontiers in Physics, 2022
In order to get a better tradeoff between the long lifetime and high performances of cesium beam atomic clocks, we proposed a design scheme of compact optically pumped cesium beam tube (OPCBT) based on hexapole magnetic focusing (HMF) system for the ...
Haijun Chen   +3 more
doaj   +1 more source

Kinetics of indium and indium–tin soldering materials in vacuum volatilization

open access: yesJournal of Materials Research and Technology, 2023
Vacuum volatilization is a clean and efficient method for metal purification, alloy separation, and comprehensive recovery of secondary resources. The evaporation kinetics of In and In–Sn alloys were investigated to better understand the evaporation ...
Jian Pang   +8 more
doaj   +1 more source

Boron-Carbon Coatings: Structure, Morphology and Mechanical Properties [PDF]

open access: yesЖурнал інженерних наук, 2020
Boron-doped carbon coatings have been produced by a method combining the deposition of a pulsed carbon plasma coating and a boron flow formed as a result of the evaporation of a boron target by pulsed YAG: Nd3+ laser irradiation.
Kulesh Е. А.   +5 more
doaj   +1 more source

The effect of CaO on the recovery of Fe and Ni in a vacuum carbothermal reduction of garnierite [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2019
The effects of adding CaO during a vacuum carbothermal reduction on Fe and Ni recovery yields were examined. In addition, magnetic separation was investigated. Experiments were conducted under pressures ranging from 10 to 50 Pa with different proportions
Wang Q.   +5 more
doaj   +1 more source

Investigation on preparation porous titanium through calciothermic reduction of porous TiO precursors

open access: yesJournal of Materials Research and Technology, 2020
A route is present for preparing porous titanium scaffolds with open and interconnected pore morphology through calcium thermal in-situ reduction of TiO precursor.
Zhijun Wang   +6 more
doaj   +1 more source

The limit Riemann solutions to nonisentropic Chaplygin Euler equations

open access: yesOpen Mathematics, 2020
We mainly consider the limit behaviors of the Riemann solutions to Chaplygin Euler equations for nonisentropic fluids. The formation of delta shock wave and the appearance of vacuum state are found as parameter ε\varepsilon tends to a certain value ...
Lin Maozhou, Guo Lihui
doaj   +1 more source

Technical research on vacuum distillation to purify magnesium to 99.99% purity

open access: yesMaterials Research Express, 2021
In this study, the distribution and evaporation principles of impurities in distilled magnesium metal were investigated using a low vacuum (8 × 10 ^4 Pa) distillation purification experiment and theoretical analysis.
Yuan Tian   +7 more
doaj   +1 more source

Application of multi-stage vacuum distillation for secondary resource recovery: potential recovery method of cadmium telluride photovoltaic waste

open access: yesJournal of Materials Research and Technology, 2020
With the widespread use of cadmium telluride solar cells, environmental protection, and effective recycling approaches for solar cell component waste have become topics of concern.
Xiaofeng Zhang   +6 more
doaj   +1 more source

Enhancing Extractable Quantum Entropy in Vacuum-Based Quantum Random Number Generator

open access: yesEntropy, 2018
Information-theoretically provable unique true random numbers, which cannot be correlated or controlled by an attacker, can be generated based on quantum measurement of vacuum state and universal-hashing randomness extraction.
Xiaomin Guo   +5 more
doaj   +1 more source

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