Results 51 to 60 of about 40,502 (295)
A global formulation for gravitation
, 2006 By exploring the similarity of teleparallel gravity with electromagnetism, a global formulation for gravitation is developed, which is based on the gauge invariant action of a nonintegrable phase-factor.
Aldrovandi, R. [UNESP] +2 more
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Potential of a Spheroid with Generalized Exponential Density Distribution
Open Astronomy, 2015 The internal potential of an inhomogeneous layered spheroid with a small ellipticity and general exponential density distribution is derived in an analytical form.
Kondratyev B. P., Kireeva E. N.
doaj +1 more source
A Comprehensive Analysis of Hyperbolical Fluids in Modified Gravity
Entropy, 2022 This paper is devoted to understanding a few characteristics of static irrotational matter content that assumes hyperbolical symmetry. For this purpose, we use metric f(R) gravity to carry out our analysis.
Z. Yousaf +3 more
doaj +1 more source
Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank
FEBS Open Bio, EarlyView.Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer +7 more
wiley +1 more source
, 2019 The author proposes a new gravitation theory, the Planck gravitation theory. The theoretical name is in honor of Planck proposing the Planck Length. Gravitation is a force in 4-dimensional space, or a force in 5-dimensional space-time.
li xiao lin
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Gravitation in Unified Scalar Field Theory
Universe, 2021 The scalar field of space-time film is considered as unified fundamental field. The field model under consideration is the space-time generalization of the model for a two-dimensional thin film.
Alexander A. Chernitskii
doaj +1 more source
Physical Review D, 2001 We consider the effect that gravity has when one tries to set up a constant background form field. We find that in analogy with the Melvin solution, where magnetic field lines self-gravitate to form a flux-tube, the self-gravity of the form field creates fluxbranes.
openaire +2 more sources
A Two‐Stage Questionnaire and Actigraphy Screening for iRBD in a Multicenter Retrospective Cohort
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Isolated rapid‐eye‐movement sleep behavior disorder is a prodromal marker of synucleinopathies. However, most cases remain undiagnosed due to the insufficient predictive value of questionnaires and limited access to confirmatory video‐polysomnography. We assessed a two‐stage screening strategy combining a brief questionnaire on rapid‐
Caleb A. Massimi +17 more
wiley +1 more source
Inertial motion, explanation, and the foundations of classical spacetime theories [PDF]
, 2012 I begin by reviewing some recent work on the status of the geodesic principle in general relativity and the geometrized formulation of Newtonian gravitation.
Weatherall, James Owen
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