Results 11 to 20 of about 47,904 (244)
Functional activities essential for space exploration performed in partial gravity during parabolic flight [PDF]
npj MicrogravityTest subjects were assessed in a partial gravity environment during parabolic flight while they performed mission-critical activities that challenged their balance and locomotion.
Gilles Clément +4 more
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Effects of Partial Gravity on the Function and Particle Handling of the Human Lung. [PDF]
Curr Pathobiol Rep, 2018 The challenges presented to the lung by the space environment are the effects of prolonged absence of gravity, the challenges of decompression stress associated with spacewalking, and the changes in the deposition of inhaled particulate matter.Although there are substantial changes in the function of the lung in partial gravity, the lung is largely ...
Prisk GK.
europepmc +4 more sources
JT gravity from partial reduction and defect extremal surface
Journal of High Energy Physics, 2023 We propose the three-dimensional counterpart for Jackiw-Teitelboim gravity coupled with CFT2 bath based on partial reduction. The three-dimensional counterpart is classical AdS gravity with a defect brane which has small fluctuation in transverse ...
Feiyu Deng, Yu-Sen An, Yang Zhou
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The partial Bondi gauge: Further enlarging the asymptotic structure of gravity
SciPost Physics, 2022 We present a detailed analysis of gravity in a partial Bondi gauge, where only the three conditions $g_{rr}=0=g_{rA}$ are fixed. We relax in particular the so-called determinant condition on the transverse metric, which is only assumed to admit a ...
Marc Geiller, Céline Zwikel
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Simulated Mars Gravity Impairs Intestinal Epithelial Barrier Integrity via Selective Modulation of Tight Junction Components [PDF]
BiomoleculesFuture long-duration human space missions will expose astronauts to chronically reduced gravitational loading, a condition associated with oxidative stress and epithelial barrier dysfunction.
Laura Benvenuti +11 more
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Approaching Gravity as a Continuum Using the Rat Partial Weight-Bearing Model
Life, 2020 For decades, scientists have relied on animals to understand the risks and consequences of space travel. Animals remain key to study the physiological alterations during spaceflight and provide crucial information about microgravity-induced changes ...
Marie Mortreux, Megan E. Rosa-Caldwell
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Geodesic Incompleteness and Partially Covariant Gravity [PDF]
Universe, 2021 We study the issue of length renormalization in the context of fully covariant gravity theories as well as non-relativistic ones such as Hořava–Lifshitz gravity. The difference in their symmetry groups implies a relation among the lengths of paths in spacetime in the two types of theory.
Antoniadis, Ignatios, Cotsakis, Spiros
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On partially massless bimetric gravity [PDF]
Physics Letters B, 2013 We extend the notion of the Higuchi bound and partial masslessness to ghost-free nonlinear bimetric theories. This can be achieved in a simple way by first considering linear massive spin-2 perturbations around maximally symmetric background solutions, for which the linear gauge symmetry at the Higuchi bound is easily identified.
Hassan, S. F. +2 more
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Partial masslessness and conformal gravity [PDF]
Journal of Physics A: Mathematical and Theoretical, 2013 We use conformal, but ghostful, Weyl gravity to study its ghost-free, second derivative, partially massless (PM) spin 2 component in presence of Einstein gravity with positive cosmological constant. Specifically, we consider both gravitational- and self- interactions of PM via the fully non-linear factorization of conformal gravity's Bach tensor into ...
Deser, S., Joung, E., Waldron, A.
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An Empirical and Subjective Model of Upper Extremity Fatigue Under Hypogravity
Frontiers in Physiology, 2022 In the context of extra-terrestrial missions, the effects of hypogravity (0 < G < 1) on the human body can reduce the well-being of the crew, cause musculoskeletal problems and affect their ability to perform tasks, especially during long-term ...
Tatiana Volkova +2 more
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