Results 11 to 20 of about 6,504,376 (296)

Energy conditions in general relativity and quantum field theory [PDF]

open access: yesClassical and quantum gravity, 2020
This review summarizes the current status of the energy conditions in general relativity and quantum field theory. We provide a historical review and a summary of technical results and applications, complemented with a few new derivations and discussions.
Eleni-Alexandra Kontou, Ko Sanders
semanticscholar   +1 more source

Gödel; From Relativity to IdealismThe Consistency between Einstein’s Relativity Theory and Kant’s Philosophy of Time [PDF]

open access: yesحکمت و فلسفه, 2011
Einstein’s theory of relativity made many difficulties for Newtonian physics, so as it did not remain any way for keeping it but setting apart or reforming some of the most fundamental concepts such as space and time.
ali akbar ahmadi afar majani   +1 more
doaj   +1 more source

Oral surveillance and JAK inhibitor safety: the theory of relativity

open access: yesNature Reviews Rheumatology, 2022
The published results of the post-marketing ORAL Surveillance study, which compared the Janus kinase (JAK) inhibitor tofacitinib with anti-TNF therapy in older patients with rheumatoid arthritis who have cardiovascular risk factors, have led to changes ...
K. Winthrop, S. Cohen
semanticscholar   +1 more source

Relative elliptic Theory [PDF]

open access: yes, 2004
This paper is a review of relative elliptic theory (i.e., elliptic theory in the category of smooth embeddings) closely related to the Sobolev problem, first studied by Sternin in the 1960s. We consider both analytic aspects of the theory (the structure of the algebra of morphisms, ellipticity, Fredholm property) and topological aspects (index formulas
Nazaikinskii, Vladimir, Sternin, Boris
openaire   +2 more sources

A note on the equivalence of energy–momentum distribution for diagonal and non-diagonal models in general relativity and teleparallel gravity

open access: yesResults in Physics, 2022
In this paper, it is shown that the super-potential defined by Einstein, Landau–Lifshitz, and Bergmann–Thompson in general relativity theory and in teleparallel gravity theory are equivalent for a general diagonal space–time metric. Therefore, the energy–
Ahmad T. Ali
doaj   +1 more source

An alternative way to present a relativistic Lagrangian definition

open access: yesRevista Brasileira de Ensino de Física, 2021
As long we known, the non-relativistic Lagrangian definition, L = T − U with T and U as being, respectively, kinetic and potential energy, it is not valid at the relativistic level.
M.A. De Andrade, C. Neves
doaj   +1 more source

Virtual Reality Media: The Simulation of Relativity Theory on Smartphone

open access: yesFormatif Jurnal Ilmiah Pendidikan MIPA, 2020
Learning physics science is ideally accomplished through the experiments, although the theory of special relativity is challenging to understand. It is difficult because this topic has not occurred in real experience, and no technology has launched at ...
D. Sumardani   +4 more
semanticscholar   +1 more source

Relative Quantum Field Theory [PDF]

open access: yesCommunications in Mathematical Physics, 2014
We highlight the general notion of a relative quantum field theory, which occurs in several contexts. One is in gauge theory based on a compact Lie algebra, rather than a compact Lie group. This is relevant to the maximal superconformal theory in six dimensions.
Freed, Daniel S, Teleman, Constantin
openaire   +4 more sources

Black Holes in an Effective Field Theory Extension of General Relativity. [PDF]

open access: yesPhysical Review Letters, 2018
Effective field theory methods suggest that some rather general extensions of general relativity include, or are mimicked by, certain higher-order curvature corrections, with coupling constants expected to be small but otherwise arbitrary.
V. Cardoso   +3 more
semanticscholar   +1 more source

The Aesthetics of String Theory Design Structure as a Source for Innovating Creative Metal Pendants [PDF]

open access: yesJournal of Architecture, Art & Humanistic Science, 2023
Nature, with its laws and systems latent within the smallest cells and particles of matter, is full of wonderful structural and aesthetic syntheses, which are utilized by the artist to build many linear, colorful or tactile rhythms.
naglaa hossny elashraf ebrahim elmogazy
doaj   +1 more source

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