Results 61 to 70 of about 365,472 (267)

Was Newton right? A search for non-Newtonian behavior of weak-field gravity

EPJ Web of Conferences, 2014
Empirical tests of Einstein’s metric theory of gravitation, even in the non-relativistic, weak-field limit, could play an important role in judging theory-driven extensions of the current Standard Model of fundamental interactions.
Boynton Paul, Moore Michael, Newman Riley, Berg Eric, Bonicalzi Ricco, McKenney Keven   +5 more
doaj   +1 more source

Topological Point Defects in SmC* Liquid Crystals Under Mechanical Disturbance

Advanced Materials Interfaces, EarlyView.
Tangetial air jet shear inducess island formation and nucleates topological point defects in uniform SmC films. Island bounded by edge dislocation loops shrink and transform into isolated point defects under continued shear. Mechanical perturbatio provides a controllable route for defect engineering in smectric liquid crystal thin films.
Gunganist Kongklad, Vandana Molahalli, Apichart Pattanaporkratana, Nattaporn Chattham   +3 more
wiley   +1 more source

Hydrogel‐Based 3D‐Printable Stretchable Pressure Sensor

Advanced Materials Technologies, EarlyView.
We present a carbon‐black‐functionalized double‐network granular hydrogel (DNGH) pressure sensor capable of detecting pressures from 200 Pa, equivalent to a light finger touch, up to 500 kPa. The sensor exhibits signal drifts below 3.5% after 800 cycles and response times around 80 ms. Leveraging this broad sensing range, we 3D print this material into
Tianyu Yuan, Chenzhuo Li, Antonia Georgopoulou, John M. Kolinski, Esther Amstad   +4 more
wiley   +1 more source

The ΛCDM-NG Cosmological Model: A Possible Resolution of the Hubble Tension

The Astrophysical Journal
We offer a cosmological model based on conventional general relativity (no speculative physics) that may resolve the Hubble tension. A reanalysis of the foundation of the Lambda-CDM model shows that general relativity alone does not specify what fraction
Richard J. Cook
doaj   +1 more source

Scalar-tensor cosmological simulations

, 2008
We present $N$-body cosmlogical simulations in the framework of the Newtonian limit of scalar-tensor theories of gravity. The scalar field is described by a modified Helmholtz equation with a source that is coupled to the standard Poisson equation of ...
Abel Camacho, Alfredo Macias, Claus Lämmerzahl, M. A. Rodríguez-Meza   +3 more
core   +1 more source

Nonlocal modification of Newtonian gravity [PDF]

, 2010
URL:http://link.aps.org/doi/10.1103/PhysRevD.81.065020 DOI:10.1103/PhysRevD.81.065020The Newtonian regime of a recent nonlocal extension of general relativity is investigated.
Blome, Hans-Joachim, Chicone, Carmen Charles, Hehl, F. W. (Friedrich W.), 1937-, Mashhoon, Bahram   +3 more
core   +1 more source

Light‑Driven Propulsion of Graphene Aerogels in Microgravity

Advanced Science, EarlyView.
Ultralight graphene aerogels convert laser light into thrust. Parabolic‐flight experiments directly compare their motion in microgravity and at 1 g, revealing order‐of‐magnitude enhancements in distance, velocity, and transient thrust when weight and friction are removed (∼50 times enhancement).
Omnia Khattab, Rami Elkaffas, Basel Altawil, Omar Alsuwaidi, Afnan Almubashir, Claire Perfetti, Shanavas Shajahan, Marco Braibanti, Sean Swei, Carlo Saverio Iorio, Yarjan Abdul Samad   +10 more
wiley   +1 more source

Gravitation: Global Formulation and Quantum Effects [PDF]

, 2003
A nonintegrable phase-factor global approach to gravitation is developed by using the similarity of teleparallel gravity with electromagnetism. The phase shifts of both the COW and the gravitational Aharonov-Bohm effects are obtained.
Aldrovandi R, Aldrovandi R, Bezerra V B, Bezerra V B, Blagojevi? M, Colella R, de Andrade V C, de Andrade V C, Ford L H, Greenberger D, Greenberger D, Hammond R T, Harris E G, Hayashi K, J G Pereira, K H Vu, Lawrence A K, Lämmerzahl C, Lämmerzahl C, Obukhov Yu N, Overhauser A W, Pereira J G, Peshkin M, R Aldrovandi, Wu T T   +24 more
core   +2 more sources

Improved Direct Ink Writing of Liquid Metal Foams via Liquid Additives

Advanced Electronic Materials, EarlyView.
The ability to pattern liquid metal is useful for making soft electrical and thermal devices. Dispensing liquid metal from a nozzle naturally results in the formation of spheroidal droplets, making direct‐write printing challenging. Liquid metal foams containing pockets of air can extrude as filaments, albeit inconsistently.
Febby Krisnadi, Tushar Sakorikar, Man Hou Vong, Michael D. Dickey   +3 more
wiley   +1 more source

Modified model of Newtonian gravitation.

Тонкие химические технологии, 2011
Within the limits of the classical mechanics for planets of the Solar system a new form of gravitational potential is suggested. The following effects are considered: perihelion advance of the planets, deviation of light beams in the field of the Sun ...
E. Kh. Nasretdinova, E. S. Savin
doaj