scholarly journals Non-static vacuum strings: exterior and interior solutions

1986 ◽  
Author(s):  
J.A. Stein-Schabes
Keyword(s):  
Static Vacuum ◽  
Interior Solutions

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.

Exact interior solutions in Einstein–Cartan–Yukawa theory

1988 ◽  
Vol 66 (2) ◽  
pp. 126-131
Author(s):  
K. D. Krori ◽  
P. Borgohain ◽  
Kanika Das ◽  
Arunima Sarma
Keyword(s):  
Massive Star ◽  
The Other ◽  
Simple Method ◽  
Physical Conditions ◽  
Interior Solutions ◽  
Yukawa Theory

A simple method of obtaining singularity-free interior solutions in Einstein–Cartan–Yukawa theory is presented here. The validity of the solution is shown by considering two types of configurations, one Schwarzschild-like and the other Tolman-IV-like. We recover the Schwarzschild and Tolman-IV solutions as soon as the Cartan and Yukawa effects are switched off. In both cases the necessary physical conditions are satisfied. The possible role of torsion in halting the collapse of a massive star is also studied.

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
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