Results 101 to 110 of about 6,479 (312)
Gravitational collapse in cubic Horndeski theories
, 2020 We study spherically symmetric gravitational collapse in cubic Horndeski theories of gravity. By varying the coupling constants and the initial amplitude of the scalar field, we determine the region in the space of couplings and amplitudes for which it ...
Franca, T, Figueras, P
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No presentism in quantum gravity [PDF]
, 2010 This essay offers a reaction to the recent resurgence of presentism in the philosophy of time. What is of particular interest in this renaissance is that a number of recent arguments supporting presentism are crafted in an untypically naturalistic vein ...
Christian Wüthrich, Wuthrich, Christian
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Advanced Science, EarlyView.Herein, we propose a solar‐powered heavy metal trap (SPHT) for sludge disposal. The indoor experiments demonstrated that the sludge water content decreased from 90 % to 31 %, coupled with a decrease in heavy metal content to 6 % at most. Furthermore, the designed SPHT generated an initial potential of 0.10 V, and monitoring this hydrovoltaic potential ...
Yanlin Li +7 more
wiley +1 more source
Revisiting loop quantum gravity with selfdual variables: classical theory
Classical and Quantum GravityAbstract We review the classical formulation of general relativity as an S L ( 2 ,
Hanno Sahlmann, Robert Seeger
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Advanced Science, EarlyView.This review presents an integrated design roadmap for practical lithium–sulfur batteries, moving beyond isolated material breakthroughs to the synergistic combination of three interdependent frontiers: Scale‐Up, Electrolyte‐Cathode Synergy, and AI/ML Data‐Driven Design.
Shihzad Shakil +6 more
wiley +1 more source
Higher order gravities and the Strong Equivalence Principle
Journal of High Energy Physics, 2017 We show that, in all metric theories of gravity with a general covariant action, gravity couples to the gravitational energy-momentum tensor in the same way it couples to the matter energy-momentum tensor order by order in the weak field approximation ...
Tomás Ortín
doaj +1 more source
On the Emergence of Time in Quantum Gravity [PDF]
, 1999 We discuss from a philosophical perspective the way in which the normal concept of time might be said to `emerge' in a quantum theory of gravity. After an introduction, we briefly discuss the notion of emergence, without regard to time (Section 2).
Butterfield, Jeremy, Isham, Chris
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Constraints on Black Holes in Classical and Semiclassical Theories of Gravity
, 1997 7 pages ...
Anderson, Paul R., Mull, Courtney D.
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Advanced Electronic Materials, EarlyView.This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley +1 more source
, 2013 How should one understand the implications of general covariance for the role of time in classical theories of gravity? On one popular view, the essential lesson is that change is relational in a strong sense, such that all it is for a physical degree of
Thebault, Karim P Y, Gryb, Sean
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