Search Results - "Tiwari, Rishi Kumar"
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A Transition Model in f(R,T) Theory via Observational Constraints
Published in Symmetry (Basel) (01-04-2023)“…A particular form of the time-dependent deceleration parameter is used to examine the accelerated expansion of the universe and the phase transition in this…”
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Anisotropic Cosmological Model in a Modified Theory of Gravitation
Published in Universe (Basel) (01-07-2021)“…Current observations indicate that, on a large enough scale, the universe is homogeneous and isotropic. However, this does not preclude the possibility of some…”
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FLRW Cosmological Models with Dynamic Cosmological Term in Modified Gravity
Published in Universe (Basel) (01-09-2021)“…Although the standard lambda cold dark matter cosmological model is quite successful in describing the universe, there are still several issues that are still…”
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The Cosmology of a Non-Minimally Coupled f(R,T) Gravitation
Published in Physics (Online) (01-12-2022)“…A non-minimally coupled cosmological scenario is considered in the context of f(R,T)=f1(R)+f2(R)f3(T) gravity (with R being the Ricci scalar and T the trace of…”
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Impact of oral health preventive program using specialized audio and tactile aids in visually impaired school children. A cross-sectional study
Published in Journal of education and health promotion (01-04-2024)“…BACKGROUND: The maintenance of oral hygiene and subsequent health related issues in visually handicapped children is a challenging task. Hence, tools must be…”
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Perturbations in Bianchi-V Spacetimes with Varying Λ, G and Viscous Fluids
Published in Universe (Basel) (01-01-2023)“…As a follow-up of a recent article in which we investigated the cosmological background expansion history of the universe in Bianchi type-V cosmological models…”
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Hyperbolic Scenario of Accelerating Universe in Modified Gravity
Published in Symmetry (Basel) (01-06-2023)“…Throughout this study, locally rotationally symmetric (LRS) Bianchi type-V space-time is pondered with Tsallis holographic dark energy (THDE) with the…”
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A cosmological model with time dependent Λ, G and viscous fluid in general relativity
Published in Frontiers in astronomy and space sciences (05-08-2022)“…In this paper, we investigate Bianchi type − V cosmological models with bulk viscous fluid and time varying cosmological Λ and Newtonian G parameters. The…”
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Decelerating to accelerating FRW universe with variable G and Λ in conharmonically flat space
Published in New astronomy (01-01-2019)“…•We have presented a new class of models of accelerating universe with gravitational coupling G(t) and cosmological term Λ(t) in the framework of general…”
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Accelerating universe with varying Λ in f(R, T) theory of gravity
Published in New astronomy (01-02-2021)“…•The model has point type singularity at t = 0.•The Hubble constant is estimated 0.069 GYrs-1.•The cosmological model of the evolving universe transit from…”
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Accelerating universe with varying Λ in ( ) theory of gravity
Published in New astronomy (01-02-2021)Get full text
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A Transition Model in If/I Theory via Observational Constraints
Published in Symmetry (Basel) (01-03-2023)“…A particular form of the time-dependent deceleration parameter is used to examine the accelerated expansion of the universe and the phase transition in this…”
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Bianchi Type-I Universe in Modified Theory of Gravity
Published in Physical sciences forum (01-02-2023)“…In this paper, we have studied an anisotropic Bianchi-I cosmological model in f(R,T) gravity. To obtain the exact solutions of the field equations, we have…”
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Transit cosmological models with domain walls in f(R, T) gravity
Published in Gravitation & cosmology (01-10-2017)“…We study the physical behavior of the transition of a 5D perfect fluid universe from an early decelerating phase to the current accelerating phase in the…”
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Noncommutative geometry inspired 3-dimensional charged black hole solution in an anti-de Sitter background spacetime
Published in The European physical journal. C, Particles and fields (2015)“…We report a 3 -D charged black hole solution in an anti-de Sitter space inspired by noncommutative geometry. In this construction, the black hole exhibits two…”
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Perturbations in Bianchi-V Spacetimes with Varying Λ, IG/I and Viscous Fluids
Published in Universe (Basel) (01-01-2023)“…As a follow-up of a recent article in which we investigated the cosmological background expansion history of the universe in Bianchi type-V cosmological models…”
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LRS Bianchi type-I cosmological models with accelerated expansion in f(R, T) gravity in the presence of Λ(T)
Published in European physical journal plus (01-05-2019)“… This paper examines the physical behaviour of the transition of the LRS Bianchi type-I perfect-fluid cosmological models from early decelerating to the…”
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A novel approach to Bianchi type-I cosmological model in f(R, T) gravity
Published in Indian journal of physics (01-05-2022)“…In this paper, we have investigated the exact solutions of a perfect fluid Bianchi type - I cosmological model in the context of f ( R , T ) = R + λ T gravity,…”
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Noncommutative geometry inspired [Formula omitted]-dimensional charged black hole solution in an anti-de Sitter background spacetime
Published in The European physical journal. C, Particles and fields (05-03-2015)“…We report a -D charged black hole solution in an anti-de Sitter space inspired by noncommutative geometry. In this construction, the black hole exhibits two…”
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