1,320 research outputs found
Influence of Electric Charge and Modified Gravity on Density Irregularities
This work aims to identify some inhomogeneity factors for plane symmetric
topology with anisotropic and dissipative fluid under the effects of both
electromagnetic field as well as Palatini gravity. We construct the
modified field equations, kinematical quantities and mass function to continue
our analysis. We have explored the dynamical quantities, conservation equations
and modified Ellis equations with the help of a viable model. Some
particular cases are discussed with and without dissipation to investigate the
corresponding inhomogeneity factors. For non-radiating scenario, we examine
such factors with dust, isotropic and anisotropic matter in the presence of
charge. For dissipative fluid, we investigate the inhomogeneity factor with
charged dust cloud. We conclude that electromagnetic field increases the
inhomogeneity in matter while the extra curvature terms make the system more
homogeneous with the evolution of time.Comment: 28 pages, no figure, version accepted for publication in European
Physical Journal
Existence of Compact Structures in Gravity
The present paper is devoted to investigate the possible emergence of
relativistic compact stellar objects through modified gravity. For
anisotropic matter distribution, we used Krori and Barura solutions and two
notable and viable gravity formulations. By choosing particular
observational data, we determine the values of constant in solutions for three
relativistic compact star candidates. We have presented some physical behavior
of these relativistic compact stellar objects and some aspects like energy
density, radial as well as transverse pressure, their evolution, stability,
measure of anisotropy and energy conditions.Comment: 27 pages, 13 figures, version accepted for publication in European
Physical Journal
Role of Model on the Stability of Cylindrical Stellar Model
The aim of this paper is to investigate the stable/unstable regimes of the
non-static anisotropic filamentary stellar models in the framework of
gravity. We construct the field equations and
conservation laws in the perspective of this gravity. The perturbation scheme
is applied to analyze the behavior of a particular
cosmological model on the evolution of
cylindrical system. The role of adiabatic index is also checked in the
formulations of instability regions. We have explored the instability
constraints at Newtonian and post-Newtonian limits. Our results reinforce the
significance of adiabatic index and dark source terms in the stability analysis
of celestial objects in modified gravity.Comment: 29 pages, no figure, version accepted for publication in European
Physical Journal
Response to a case report titled: Anaesthetic management of a patient with left ventricular non-compaction undergoing laparotomy
Why Did I Become An Entrepreneur: Case Study on S. M. Asad ul Haq
Introduction:Research papers on entrepreneurship generally discuss the characteristics and the psychological profile of entrepreneurs with the intent that people having certain qualities and personality traits are more likely to succeed as an entrepreneur. This is also the basis of psychometric tests that have been developed to evaluate one's potential to become an entrepreneur. These tests have been developed on the basis of research studies conducted to evaluate the psychometric profile of successful entrepreneurs. Such research however does not answer the question why some people with similar characteristics and similar psychological profile become entrepreneurs while others do not. It was with this intent that I have made an attempt to investigate into the events and the circumstances in the life of people who have become entrepreneurs. The basic premise is that it is not simply the characteristics and psychological profile of the person but more importantly the circumstances in the life of the person and that of his/her family that creates a situation which provides the thrust for one to take the initiative and the concomitant risk to start a business venture rather than to seek work as an employee in an organization
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