Zobrazeno 1 - 10
of 119
pro vyhledávání: '"Hajian K"'
Publikováno v:
مجله دانشگاه علوم پزشکی گرگان, Vol 14, Iss 2, Pp 52-57 (2012)
Background and Objective: The incidence of ectopic pregnancy is increasing due to artificial reproductive technology and increasing rate of sexual transmitted diseases. Ectopic pregnancy is the most common cause of maternal mortality in the first tri
Externí odkaz:
https://doaj.org/article/e5697baf6033454095a6884b4ce072fa
Publikováno v:
مجله دانشگاه علوم پزشکی گرگان, Vol 13, Iss 2, Pp 53-60 (2011)
Background and Objective: The safety of teenagers and young are the major factor in developing a community and they are also the major group at risk of behavioural problems. So, this study was performed to evaluate the prevalence of risky behaviours
Externí odkaz:
https://doaj.org/article/5cbb4ccff69d49238a7dd74ed71bb48d
Publikováno v:
Phys.Rev.D 106 (2022) 10, 104030
In gauge invariant theories, like Einstein-Maxwell theory, physical observables should be gauge invariant. In particular, mass, entropy, angular momentum, electric charge and their respective chemical potentials, temperature, horizon angular velocity
Externí odkaz:
http://arxiv.org/abs/2209.00563
Publikováno v:
Phys. Lett. B812 (2020) 136002
It has been observed that for black holes in certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories speeds of propagation of grav
Externí odkaz:
http://arxiv.org/abs/2005.12985
Publikováno v:
Phys. Rev. D 98, 026025 (2018)
We present a one-function family of solutions to 4D vacuum Einstein equations. While all diffeomorphic to the same extremal Kerr black hole, they are labeled by well-defined conserved charges and are hence distinct geometries. We show that this famil
Externí odkaz:
http://arxiv.org/abs/1708.06378
Autor:
Hajian, K., Sheikh-Jabbari, M. M.
Publikováno v:
Phys.Lett. B768 (2017) 228-234
Black holes as solutions to gravity theories, are generically identified by a set of parameters. Some of these parameters are associated with black hole physical conserved charges, like ADM charges. There can also be some "redundant parameters." We p
Externí odkaz:
http://arxiv.org/abs/1612.09279
Publikováno v:
Eur. Phys. J. C (2016) 76: 701
Restricting the covariant gravitational phase spaces to the manifold of parametrized families of solutions, the mass, angular momenta, entropies, and electric charges can be calculated by a single and simple method. In this method, which has been cal
Externí odkaz:
http://arxiv.org/abs/1606.04353
Autor:
Hajian, K., Sheikh-Jabbari, M. M.
Publikováno v:
Phys. Rev. D 93, 044074 (2016)
We provide a general formulation for calculating conserved charges for solutions to generally covariant gravitational theories with possibly other internal gauge symmetries, in any dimensions and with generic asymptotic behaviors. These solutions are
Externí odkaz:
http://arxiv.org/abs/1512.05584
Publikováno v:
JHEP 1510 (2015) 093
We construct the classical phase space of geometries in the near-horizon region of vacuum extremal black holes as announced in [arXiv:1503.07861]. Motivated by the uniqueness theorems for such solutions and for perturbations around them, we build a f
Externí odkaz:
http://arxiv.org/abs/1506.07181
Publikováno v:
Phys.Lett. B749 (2015) 443-447
We construct the NHEG phase space, the classical phase space of Near-Horizon Extremal Geometries with fixed angular momenta and entropy, and with the largest symmetry algebra. We focus on vacuum solutions to $d$ dimensional Einstein gravity. Each ele
Externí odkaz:
http://arxiv.org/abs/1503.07861