Cryogenic vessels. Static vacuum insulated vessels

2003 ◽  
Keyword(s):  
Static Vacuum

The Einstein pseudo-tensor and the flux integral for perturbed static space-times

1991 ◽  
Vol 435 (1895) ◽  
pp. 645-657 ◽  
Keyword(s):  
Energy Momentum Tensor ◽  
Momentum Tensor ◽  
Einstein Equations ◽  
Second Variation ◽  
Common Procedure ◽  
Static Vacuum ◽  
Linear Perturbations ◽  
Maxwell Space ◽  
The Common ◽  
Static Space

The flux integral for axisymmetric polar perturbations of static vacuum space-times, derived in an earlier paper directly from the relevant linearized Einstein equations, is rederived with the aid of the Einstein pseudo-tensor by a simple algorism. A similar earlier effort with the aid of the Landau–Lifshitz pseudo-tensor failed. The success with the Einstein pseudo-tensor is due to its special distinguishing feature that its second variation retains its divergence-free property provided only the equations governing the static space-time and its linear perturbations are satisfied. When one seeks the corresponding flux integral for Einstein‒Maxwell space-times, the common procedure of including, together with the pseudo-tensor, the energy‒momentum tensor of the prevailing electromagnetic field fails. But, a prescription due to R. Sorkin, of including instead a suitably defined ‘Noether operator’, succeeds.

Static vacuum fields in self-creation cosmology

1989 ◽  
Vol 152 (1) ◽  
pp. 175-177 ◽  
Author(s):  
Tarkeshwar Singh
Keyword(s):  
Static Vacuum ◽  
Vacuum Fields

Simultaneous distillation—extraction under static vacuum: isolation of volatile compounds at room temperature

1992 ◽  
Vol 606 (1) ◽  
pp. 87-94 ◽  
Author(s):  
L. Maignial ◽  
P. Pibarot ◽  
G. Bonetti ◽  
A. Chaintreau ◽  
J.P. Marion
Keyword(s):  
Volatile Compounds ◽  
Room Temperature ◽  
Static Vacuum ◽  
Simultaneous Distillation Extraction

Studies on the Sorption of Benzene over DX 09 Carbon

2014 ◽  
Vol 525 ◽  
pp. 146-149
Author(s):  
Xin Ming Wang ◽  
Hai Rong Tang ◽  
Xue Zhi Zhou ◽  
Ning Wang ◽  
Feng Hua Yang
Keyword(s):  
Surface Area ◽  
Bet Surface Area ◽  
Benzene Adsorption ◽  
Static Vacuum

BET (Brunauer Emmett and Teller) surface area and pores distribution for the samples DX 09 Carbon were measured for of DX 09 carbon by N2 adsorption (195 °C) with Autosorb-1C (American Quantachrome Company).The adsorption of benzene over DX 09 Carbon was measured in the static vacuum adsorption equipment, which was self-constructed in laboratory. It was experimentally found that the BET surface area is about 1008 m2/g, and the structure coefficients for DX-09 carbon were W=0.365 and B=1.32*10-6 measured by benzene adsorption and calculated by D-R equation.

Balancing static vacuum black holes with signed masses in four and five dimensions

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
Marcus Khuri ◽  
Gilbert Weinstein ◽  
Sumio Yamada
Keyword(s):  
Black Holes ◽  
Static Vacuum ◽  
Five Dimensions

scholarly journals On the Analyticity of Static Solutions of a Field Equation in Finsler Gravity

Universe ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 59
Author(s):  
Erasmo Caponio ◽  
Antonio Masiello
Keyword(s):  
Field Equation ◽  
Ricci Scalar ◽  
Einstein Equations ◽  
Static Vacuum ◽  
Static Solutions ◽  
Vacuum Solutions

It is well-known that static vacuum solutions of Einstein equations are analytic in suitable coordinates. We ask here for an extension of this result in the context of Finsler gravity. We consider Finsler spacetimes that retain several properties of static Lorentzian spacetimes, are Berwald and have vanishing Ricci scalar.

On the origin of black hole evaporation radiation

1976 ◽  
Vol 351 (1664) ◽  
pp. 129-139 ◽  
Keyword(s):  
Black Hole ◽  
Energy Momentum Tensor ◽  
Momentum Tensor ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
Static Vacuum ◽  
Black Hole Evaporation ◽  
A Value ◽  
Special Case ◽  
Collapse Process

The physical basis underlying the black hole evaporation process is clarified by a calculation of the expectation value of the energy-momentum tensor for a massless scalar field in a completely general two dimensional collapse scenario. It is found that radiation is produced inside the collapsing matter which propagates both inwards and outwards. The ingoing com­ponent eventually emerges from the star after travelling through the centre. The outgoing energy flux appears at infinity as the evaporation radiation discovered by Hawking. At late times, outside the star, the former component fades out exponentially, and the latter component approaches a value which is independent of the details of the collapse process. In the special case of a collapsing hollow, thin shell of matter, all the radiation is produced at the shell. These results are independent of regularization ambiguities, which enter only the static vacuum polariza­tion terms in the energy-momentum tensor. The significance of an earlier remark about black hole explosions is discussed in the light of these results.

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