Results 51 to 60 of about 365,472 (267)

La relativité générale au tournant des années soixante

open access: yesPhilosophia Scientiæ, 2011
During fifty years Einstein’s theory of gravitation was limited to a backward neo-newtonian interpretation. Nevertheless it was sufficient to as­sure its predominance in regard to Newton’s theory.
Jean Eisenstaedt
doaj   +1 more source

Maxwell-Huygens, Newton-Cartan, and Saunders-Knox Spacetimes [PDF]

open access: yes, 2014
I address a question recently raised by Simon Saunders [Phil. Sci. 80(2): 22-48 (2013)] concerning the relationship between the spacetime structure of Newton-Cartan theory and that of what I will call "Maxwell-Huygens spacetime".
Weatherall, James Owen
core   +3 more sources

Nonlocal General Relativity

open access: yesGalaxies, 2014
A brief account of the present status of the recent nonlocal generalization of Einstein’s theory of gravitation is presented. The main physical assumptions that underlie this theory are described.
Bahram Mashhoon
doaj   +1 more source

Gravitational vacuum polarization phenomena due to the Higgs field

open access: yes, 2012
In the standard model the mass of elementary particles is considered as a dynamical property emerging from their interaction with the Higgs field. We show that this assumption implies peculiar deviations from the law of universal gravitation in its ...
Onofrio, Roberto
core   +1 more source

The Mass of the Gravitational Field [PDF]

open access: yes, 2019
By mass-energy equivalence, the gravitational field has a relativistic mass density proportional to its energy density. I seek to better understand this mass of the gravitational field by asking whether it plays three traditional roles of mass: the role ...
Sebens, Charles T.
core   +2 more sources

Stable Protein‐Based G‐Quadruplex‐Derived Supramolecular Bioinks as Tunable ECM‐Mimetic Constructs Assembled by Combining Non‐Covalent and Covalent Strategies

open access: yesAdvanced Materials, EarlyView.
Harnessing the synergistic interplay of supramolecular self‐assembly, under macromolecular crowding conditions, and enzymatic‐mediated covalent crosslinking toward a stable protein‐based G‐quadruplex‐derived supramolecular bioink. This bioinspired strategy enables the biofabrication of complex and tunable ECM‐mimetic constructs, providing a platform ...
Vera Sousa   +6 more
wiley   +1 more source

On the Metric Lorentz Invariant Newtonian Cosmology

open access: yesUniverse
We review a metric theory of gravitation that combines Newtonian gravity with Lorentz invariance. Beginning with a conformastatic metric justified by the Weak Equivalence Principle.
Jaume de Haro
doaj   +1 more source

A vector field approach to calculating gravitational forces

open access: yesNew Journal of Physics, 2017
Calculation of gravitational forces is essential for many fundamental measurements, such as determining the gravitational constant or investigating violations of the inverse square law.
Julian Stirling
doaj   +1 more source

Breakdown of the Newton–Einstein Standard Gravity at Low Acceleration in Internal Dynamics of Wide Binary Stars

open access: yesThe Astrophysical Journal, 2023
A gravitational anomaly is found at weak gravitational acceleration g _N ≲ 10 ^−9 m s ^−2 from analyses of the dynamics of wide binary stars selected from the Gaia DR3 database that have accurate distances, proper motions, and reliably inferred stellar ...
Kyu-Hyun Chae
doaj   +1 more source

Hydrogel‐Based Airway‐on‐Tube With Perfusable Endothelial Lumen and Outward Epithelialization

open access: yesAdvanced Materials, EarlyView.
A hydrogel‐based airway‐on‐tube platform featuring a perfusable endothelial lumen and outward epithelialization is presented. The system supports primary human bronchial epithelial and lung microvascular endothelial coculture under air‐liquid interface conditions.
Ali Doryab   +8 more
wiley   +1 more source

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