Results 51 to 60 of about 166,028,825 (289)
Black Hole Entropy for Two Higher Derivative Theories of Gravity
Entropy, 2010 The dark energy issue is attracting the attention of an increasing number of physicists all over the world. Among the possible alternatives to explain what as been named the “Mystery of the Millennium” are the so-called Modified Theories of Gravity.
Lorenzo Sebastiani +3 more
doaj +1 more source
Stretching the Printability Metric in Direct‐Ink Writing with Highly Extensible Yield‐Stress Fluids
Advanced Functional Materials, EarlyView.This study introduces “drawability” as a new metric for assessing printability in direct‐ink writing, focusing on gap‐spanning performance and speed robustness. By designing yield‐stress fluids with high extensibility, we demonstrate that extensional strain‐to‐break significantly enhances printability.
Chaimongkol Saengow +9 more
wiley +1 more source
A Phase Space Diagram for Gravity
Entropy, 2012 In modified theories of gravity including a critical acceleration scale <em>a</em><sub>0</sub>, a critical length scale<em> r<sub>M</sub> = (GM/a</em><sub>0</sub><em>)<sup>1/2< ...
Xavier Hernandez
doaj +1 more source
Advanced Functional Materials, EarlyView.Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou +6 more
wiley +1 more source
Beyond General Relativity: Modified Theories and Non-Singular Black Holes [PDF]
, 2020 Einstein's general relativity is an extremely elegant and successful theory. Recent observations coming from the LIGO/VIRGO collaboration as well as from the Event Horizon Telescope give us the possibility to perform precision test of general relativity ...
Di Filippo, Francesco
core
Naked singularity in modified gravity theory
Journal of Physics: Conference Series, 2009 8 Pages. Contribution given to DICE 2008.
openaire +2 more sources
Cosmological Observations in a Modified Theory of Gravity (MOG) [PDF]
Galaxies, 2013 Our Modified Gravity Theory (MOG) is a gravitational theory without exotic dark matter, based on an action principle. MOG has been used successfully tomodel astrophysical phenomena, such as galaxy rotation curves, galaxy cluster masses and lensing. MOG may also be able to account for cosmological observations.
Moffat, John., Toth, Viktor
openaire +3 more sources
Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine
Advanced Materials, EarlyView.A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen +5 more
wiley +1 more source
On holographic Rényi entropy in some modified theories of gravity
Journal of High Energy Physics, 2018 We perform a detailed analysis of holographic entanglement Rényi entropy in some modified theories of gravity with four dimensional conformal field theory duals.
Anshuman Dey +2 more
doaj +1 more source
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