Zobrazeno 1 - 10
of 629
pro vyhledávání: '"Elmardi, A."'
In this paper, we investigate the evolution of cosmological perturbations within the context of Bianchi Type$-I$ spacetimes. We consider models containing viscous fluids with evolving cosmological (\LL) and Newtonian gravitational (G) parameters. The
Externí odkaz:
http://arxiv.org/abs/2311.03399
Autor:
AHMED, Awadallah1, ELMARDI, Osama1, ELMAHI, Fathelrahman1, YOUNIS, Obai2,3, ABDELRAHMAN, Mansour1
Publikováno v:
Journal of Thermal Engineering. Jul2024, Vol. 10 Issue 4, p986-1010. 25p.
In this paper, we undertake a unified study of background dynamics and cosmological perturbations in the presence of the Chaplygin gas. This is done by first constraining the background cosmological parameters of different Chaplygin gas models with S
Externí odkaz:
http://arxiv.org/abs/2112.11695
Various observations from cosmic microwave background radiation (CMBR), type Ia supernova and baryon acoustic oscillations (BAO) are strongly suggestive of an accelerated expansion of the universe which can be explained by the presence of mysterious
Externí odkaz:
http://arxiv.org/abs/2109.14991
Autor:
Soha Shawqi Albayat, Jesha Mohammedali Mundodan, Khalid Elmardi, Samina Hasnain, Hayat Khogali, Rekayahouda Baaboura, Hamad Eid Al-Romaihi, Noora Jasim AlKubaisi, Mohamed Iheb Bougmiza
Publikováno v:
Women's Health, Vol 20 (2024)
Background: The human papilloma virus is a global problem that affects sexually active women and men, with cervical cancer being the most serious associated disease. Most cervical cancer cases can be prevented by vaccination against the human papillo
Externí odkaz:
https://doaj.org/article/a6dcd6290c1b48858f915bfe754ee411
Publikováno v:
SAIP2019 Proceedings
In this paper we study the perturbations of a cosmic multi-fluid medium consisting of radiation, dust and a Chaplygin gas. To do so, we follow the 1 + 3 covariant formalism and derive the evolution equations of the fluctuations in the energy density
Externí odkaz:
http://arxiv.org/abs/2010.05173
In this work, we revisit the shear-free conjecture of general relativity and show the violation of the well-known shear-free condition for perfect-fluid spacetimes. It had been shown in previous investigations that, in the general relativistic framew
Externí odkaz:
http://arxiv.org/abs/2003.09441
Autor:
Fouzia Shersad, Samar Ahmed, Mariam Shadan, Arina Ziganshina, Yousif El Tayeb, Abdelmoneim Elmardi
Publikováno v:
MedEdPublish, Vol 13 (2023)
Following current trends, educational institutions often decide to use a competency framework as an overarching structure in their assessment system. Despite the presence of a common understanding of how different examinations can contribute to the d
Externí odkaz:
https://doaj.org/article/af820973e4f24db0bcfd3515d72c8999
This paper explores the possibility of treating the exotic Chaplygin-gas (CG) fluid model as some manifestation of an $f(T)$ gravitation. To this end, we use the different cosmological CG equations of state, compare them with the equation of state fo
Externí odkaz:
http://arxiv.org/abs/1904.09897
Autor:
Khalid Abdelmutalab Elmardi, Ishag Adam, Elfatih Mohamed Malik, Hmooda Toto Kafy, Mogahid Sheikheldien Abdin, Immo Kleinschmidt, Stef Kremers, Jessica Sophia Gubbels
Publikováno v:
BMC Infectious Diseases, Vol 22, Iss 1, Pp 1-10 (2022)
Abstract Background The past two decades were associated with innovation and strengthening of malaria control interventions, which have been increasingly adopted at large scale. Impact evaluations of these interventions were mostly performed in moder
Externí odkaz:
https://doaj.org/article/8a584a38e53d491bb56d0e20fe929c31