Results 11 to 20 of about 467,438 (306)

Interaction Between Macroscopic Quantum Systems and Gravity

open access: yesFrontiers in Physics, 2022
We review experiments and theoretical models about the possible mutual interplay between the gravitational field and materials in the superconducting state or other macroscopic quantum states.
A. Gallerati   +3 more
doaj   +1 more source

Gravitation waves from QCD and electroweak phase transitions [PDF]

open access: yesJournal of High Energy Physics, 2017
We investigate the gravitation waves produced from QCD and electroweak phase transitions in the early universe by using a 5-dimension holographic QCD model and a holographic technicolor model.
Yidian Chen, Mei Huang, Q. Yan
semanticscholar   +1 more source

Aligned electric and magnetic Weyl fields [PDF]

open access: yes, 2003
We analyze the spacetimes admitting a direction for which the relative electric and magnetic Weyl fields are aligned. We give an invariant characterization of these metrics and study the properties of its Debever null vectors.
Joan Josep Ferr, Juan Antonio Sáez
core   +2 more sources

Parcours, pratique théorique et documents scientifiques « privés » du physicien Jacques Solomon

open access: yesComptes Rendus. Physique, 2022
Jacques Solomon (1908-1942) is an important figure in the theoretical physics of the 1930s in France. His published works and the personal documents that have been entrusted to me, reveal specific writing processes and theoretical elaborations, which his
Bustamante De La Ossa, Martha-Cecilia
doaj   +1 more source

On the invisibility and impact of Robert Hooke’s theory of gravitation

open access: yesOpen Philosophy, 2020
Robert Hooke’s theory of gravitation is a promising case study for probing the fruitfulness of Menachem Fisch’s insistence on the centrality of trading zone mediators for rational change in the history of science and mathematics.
Guicciardini Niccolò
doaj   +1 more source

The cause of axial rotation of the scoliotic spine [PDF]

open access: yes, 1991
To explain the cause of axial rotation in a scoliotic vertebral column, the influence of the gravitation force on a spine with a C-scoliosis has been investigated by means of a mechanical model. In this model the gravitation force takes hold of the three-
Cool, J.C.   +3 more
core   +2 more sources

Gravitation-based personalized recommendation algorithm

open access: yes工程科学学报, 2015
A recommendation algorithm is proposed by introducing the universal law of gravitation into a recommendation system. This new algorithm is named as the gravitation-based personalized recommendation (GBPR) algorithm.
WANG Guo-xia, LIU He-ping, LI Qing
doaj   +1 more source

Probing Yukawian gravitational potential by numerical simulations. I. Changing N-body codes [PDF]

open access: yes, 2009
In the weak field limit general relativity reduces, as is well known, to the Newtonian gravitation. Alternative theories of gravity, however, do not necessarily reduce to Newtonian gravitation; some of them, for example, reduce to Yukawa-like potentials ...
A. Toomre   +16 more
core   +1 more source

Predictions and Outcomes for the Dynamics of Rotating Galaxies

open access: yesGalaxies, 2020
A review is given of a priori predictions made for the dynamics of rotating galaxies. One theory—MOND—has had many predictions corroborated by subsequent observations.
Stacy McGaugh
doaj   +1 more source

Some applications of the Shapiro time delay [PDF]

open access: yesSerbian Astronomical Journal, 2023
Listening to echoes has long been a way to estimate distances, a technique whose backbone is the time delay. The gravitational field also creates a time delay, called Shapiro time delay, that helps us extract some information from the field and ...
Ghasemi Azar A., Rezaei H., Moradpour H.
doaj   +1 more source

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