Results 1 to 10 of about 643,628 (282)

On a Class of Harko-Kovacs-Lobo Wormholes

open access: yesUniverse, 2022
The Harko, Kovács, and Lobo wormhole (HKLWH) metric contains two free parameters: one is the wormhole throat r0, and the other is a dimensionless deviation parameter γ with values ...
Ramis Kh. Karimov   +2 more
doaj   +1 more source

Comparative assessment of yield and environmental stability of common dill samples

open access: yesОвощи России, 2022
Relevance. The creation of varieties and hybrids with environmental sustainability is a priority in crop breeding. Many issues related to biology and ecology of a number of spice plants remain understudied.
V. V. Skorina, A. V. Piatrenka
doaj   +1 more source

Accretion Flow onto Ellis–Bronnikov Wormhole

open access: yesUniverse, 2021
Study of accretion onto wormholes is rather rare compared to that onto black holes. In this paper, we consider accretion flow of cosmological dark energy modeled by barotropic fluid onto the celebrated Ellis–Bronnikov wormhole (EBWH) built by Einstein ...
Rosaliya M. Yusupova   +3 more
doaj   +1 more source

On the Possibility of Observing Negative Shapiro-like Delay Using Michelson–Morley-Type Experiments

open access: yesUniverse, 2023
The possibility of observing negative Shapiro-like gravitational time delay (or time advancement) due to the Earth’s gravity employing interferometric experiments on the Earth’s surface is discussed.
Arunava Bhadra   +2 more
doaj   +1 more source

Assessment of samples of common dill (Anethum graveolens L.) by a complex of valuable characteristics

open access: yesОвощи России, 2022
Relevance. Among green and spice crops, dill occupies a special place in the human diet. The crop is widespread and is represented by varieties for various purposes.
A. V. Piatrenka
doaj   +1 more source

Leon Trostsky And His Political Role in the Bolshevik Revolution 1917-1924. [PDF]

open access: yesمجلة جامعة الأنبار للعلوم الإنسانية, 2023
The Russian revolution is not a revolution against the rule and the overthrow of the tsarist state in Russia, but rather a radical change of new political, social and cultural concepts, which had an impact on the world.
Muath Helal Al. Heeti
doaj   +1 more source

Damour–Solodukhin Wormhole as a Black Hole Mimicker: The Role of Observers’ Location

open access: yesUniverse, 2022
It has been recently argued that in semi-classical gravity, a minimal 2-sphere is not a horizon but a tiny throat of a wormhole, such as the Damour–Solodukhin wormhole (DSWH), with a free parameter λ≠0 separating it from a Schwarxzschild black hole (BH) (
Kamal K. Nandi   +3 more
doaj   +1 more source

On the hoop conjecture in Einstein gravity coupled to nonlinear electrodynamics

open access: yesPhysics Letters B, 2020
The famous hoop conjecture by Thorne has been claimed to be violated in curved spacetimes coupled to linear electrodynamics. Hod [1] has recently refuted this claim by clarifying the status and validity of the conjecture appropriately interpreting the ...
K.K. Nandi   +4 more
doaj   +1 more source

The method of compensating loads for solving of problems of cyclic symmetrical flexure of anisotropic plates, resting on an elastic subgrade

open access: yesStructural Mechanics of Engineering Constructions and Buildings, 2021
The purpose of the study - receiving of exact analytical solutions of statics problems of anisotropic plates, resting on an elastic subgrade and subjected to an action of cyclic symmetrical loads.
Elena B. Koreneva
doaj   +1 more source

Dr Oen Boen Ing Patriot Doctor, Social Activist, and Doctor of the Poor [PDF]

open access: yes, 2017
This article examines the efforts and achievements of Oen Boen Ing, a Tionghoa doctor, to improve the quality of health of the poorer inhabitants of Surakarta.
Lie, R. (Ravando)
core   +4 more sources

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