Results 71 to 80 of about 167,529,233 (288)
Modified gravity revealed along geodesic tracks
European Physical Journal C: Particles and Fields, 2018 The study of the dynamics of a two-body system in modified gravity constitutes a more complex problem than in Newtonian gravity. Numerical methods are typically needed to solve the equations of geodesics.
Mariafelicia De Laurentis +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
The Flyby Anomaly in an Extended Whitehead’s Theory
Galaxies, 2015 In this paper, we consider an extended version of Whitehead’s theory of gravity in connection with the flyby anomaly. Whitehead’s theory is a linear approximation defined in a background Minkowski spacetime, which gives the same solutions as standard ...
Luis Acedo
doaj +1 more source
Three dimensional modified gravities as holographic limits of Lancsoz-Lovelock theories
Physics Letters B, 2020 We define a “holographic limit” of Lancsoz-Lovelock theories at the Lagrangian level which gives three-dimensional modified gravity theories. We also show that this limit applies to more general classes of theories in higher dimensions provided that they
Gökhan Alkaç, Deniz Olgu Devecioğlu
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LUNAR SYSTEM CONSTRAINTS ON THE MODIFIED THEORIES OF GRAVITY [PDF]
International Journal of Modern Physics D, 2013 The Modified Newtonian Dynamics (MOND) paradigm to the missing mass problem requires introducing a functional that is to be identified through observations and experiments. We consider the aquadratic Lagrangian theory as a realization of the MOND. We show that the accurate value of the Earth GM measured by the lunar laser ranging measurements and that
openaire +2 more sources
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
A new class of group field theories for 1st order discrete quantum gravity [PDF]
, 2008 Group Field Theories, a generalization of matrix models for 2d gravity, represent a 2nd quantization of both loop quantum gravity and simplicial quantum gravity.
Afd Theoretical Physics (ITF) +3 more
core
Teleparallel Theories of Gravity: Illuminating a Fully Invariant Approach [PDF]
, 2019 Teleparallel gravity and its popular generalization $f(T)$ gravity can be formulated as fully invariant (under both coordinate transformations and local Lorentz transformations) theories of gravity.
Coley, A. A. +9 more
core +1 more source
Modified theories of gravity: the horndeski models [PDF]
In this thesis, a qualitative analysis is proposed on how theories related to gravity have changed over time until reaching the well-known modified theories of gravitation, demonstrating the power they hold. The aim is to serve as an entry point to the
FERNANDES FILHO, Ricardo Alexandre
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Generalized second law in the modified theory of gravity [PDF]
Physical Review D, 2007 In the context of modified theory of gravity (f(R) gravity) we try to study the conditions required for validity of the generalized second law.
openaire +2 more sources