Non-static conformally flat spherically symmetric space-times in Einstein–Cartan theory
Sign Up to like & getrecommendations! Published in 2019 at "Chinese Journal of Physics"
DOI: 10.1016/j.cjph.2019.03.010
Abstract: Abstract By exploiting the null tetrad formalism of Jogia and Griffiths and the technique of differential forms on a non-Riemannian space-time, non-static conformally flat, Petrov-type D, spherically symmetric solutions of the Einstein–Cartan field equations; when… read more here.
Keywords: spherically symmetric; conformally flat; einstein cartan; non static ... See more keywords
Calibration of hygrometers at non-static conditions
Sign Up to like & getrecommendations! Published in 2019 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/ab56a6
Abstract: Current practice of calibrating humidity sensors at discrete measurement points under static conditions is time consuming, i.e. expensive, due to the long stabilization times. In order to reduce the calibration time, we introduce a new… read more here.
Keywords: static conditions; non static; time; calibration ... See more keywords
Homothetic Ricci collineations of non-static spherically symmetric spacetimes with perfect fluid matter
Sign Up to like & getrecommendations! Published in 2018 at "Modern Physics Letters A"
DOI: 10.1142/s0217732318501961
Abstract: Non-static spherically symmetric spacetimes with perfect fluid matter are considered and their homothetic Ricci collineations (HRCs) are investigated for degenerate as well as non-degenerate Ricci tensor. The present analysis shows that, for non-degenerate Ricci tensor,… read more here.
Keywords: spherically symmetric; ricci; non static; symmetric spacetimes ... See more keywords