Results 91 to 100 of about 4,617 (266)
Advanced Materials, EarlyView.Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang +5 more
wiley +1 more source
Constraints on Gravitation from Causality and Quantum Consistency
Advances in High Energy Physics, 2018 We examine the role of consistency with causality and quantum mechanics in determining the properties of gravitation. We begin by examining two different classes of interacting theories of massless spin 2 particles—gravitons.
Mark P. Hertzberg
doaj +1 more source
Generalization of Einstein’s gravitational field equations
European Physical Journal C: Particles and Fields, 2017 The Riemann tensor is the cornerstone of general relativity, but as is well known it does not appear explicitly in Einstein’s equation of gravitation. This suggests that the latter may not be the most general equation. We propose here for the first time,
Frédéric Moulin
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Advanced Materials, EarlyView.Spatiotemporal control over cell behavior within bioprinted constructs remains a key challenge in biofabrication. Volumetric bioprinting using multi‐wavelength light sources permits to activate light‐sensitive intracellular proteins as well as optogenetic gene and protein expression circuits in bioprinted cells, in addition to enabling fast printing of
Davide Ribezzi +14 more
wiley +1 more source
GUP parameter from quantum corrections to the Newtonian potential
Physics Letters B, 2017 We propose a technique to compute the deformation parameter of the generalized uncertainty principle by using the leading quantum corrections to the Newtonian potential.
Fabio Scardigli +2 more
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Who's Afraid of Background Independence? [PDF]
, 2008 Background independence is generally considered to be ‘the mark of distinction’ of general relativity. However, there is still confusion over exactly what background independence is and how, if at all, it serves to distinguish general relativity from ...
Dean Rickles, Rickles, Dean
core +1 more source
Fast Hydrogel Micro‐Actuators Driven by Electric Fields
Advanced Materials, EarlyView.We report the fabrication of chemically programmable electroactuating microstructures through the first integration of two‐photon polymerization with electrically actuated gelatin methacrylate‐based hydrogels. By tailoring the charge of the polymer network, we demonstrate programmable polarity‐dependent bending, enabling microstructures that ...
Annaël Sort‐Montenegro +6 more
wiley +1 more source
Entropy Production and Equilibrium Conditions of General-Covariant Spin Systems
Entropy, 2015 In generalizing the special-relativistic one-component version of Eckart’s continuum thermodynamics to general-relativistic space-times with Riemannian or post-Riemannian geometry as presented by Schouten (Schouten, J.A.
Wolfgang Muschik +1 more
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Advanced Materials, EarlyView.Water harvesting, radiative cooling, and interfacial solar evaporation are fundamentally governed by coupled heat, mass, and light transport processes. These processes are mediated by pore architecture, including pore size, connectivity, and hierarchical organization.
Dejan J. Trajkovski +5 more
wiley +1 more source
Physics for philosophers: Relativity Principle, Inertial Law and faith in what is impossible.
Bajo Palabra, 2018 An attainable way to understand why we must reasonably doubt about a definite aspect of Albert Einstein´s geometric theory of gravitation, when he denies the character of force for gravity, is throughout the history of Relativity Principle and Inertial ...
Jorge León de la Vega
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