**Gravitation**: Acceleration produced by the mutual attraction of two masses, and of magnitude inversely proportional to the square of the distance between the two centers of mass. It is also the force imparted by the earth, moon, or a planet to an object near its surface. (From NASA Thesaurus, 1988)

**Gravity Sensing**: Process whereby a cell, bodily structure, or organism (animal or plant) receives or detects a gravity stimulus. Gravity sensing plays an important role in the directional growth and development of an organism (GRAVITROPISM).

**Weightlessness**: Condition in which no acceleration, whether due to gravity or any other force, can be detected by an observer within a system. It also means the absence of weight or the absence of the force of gravity acting on a body. Microgravity, gravitational force between 0 and 10 -6 g, is included here. (From NASA Thesaurus, 1988)

**Hypogravity**: Condition wherein the force of gravity is less than or is decreased below that on the surface of the earth. This is expressed as being between 0 and 1 g.

**Hypergravity**: Condition wherein the force of gravity is greater than or is increased above that on the surface of the earth. This is expressed as being greater than 1 g.

**Weightlessness Simulation**: Condition under normal Earth gravity where the force of gravity itself is not actually altered but its influence or effect may be modified and studied. (From ASGSB Bull 1992;5(2):27)

**Hindlimb Suspension**: Technique for limiting use, activity, or movement by immobilizing or restraining animal by suspending from hindlimbs or tails. This immobilization is used to simulate some effects of reduced gravity and study weightlessness physiology.

**Visual Fields**: The total area or space visible in a person's peripheral vision with the eye looking straightforward.

**Electromagnetic Fields**: Fields representing the joint interplay of electric and magnetic forces.

**Bibliometrics**: The use of statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use. Formerly called statistical bibliography. (from The ALA Glossary of Library and Information Science, 1983)

**Illinois**

**Publications**: Copies of a work or document distributed to the public by sale, rental, lease, or lending. (From ALA Glossary of Library and Information Science, 1983, p181)

**Research**: Critical and exhaustive investigation or experimentation, having for its aim the discovery of new facts and their correct interpretation, the revision of accepted conclusions, theories, or laws in the light of newly discovered facts, or the practical application of such new or revised conclusions, theories, or laws. (Webster, 3d ed)

**Biological Science Disciplines**: All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.

**Biomedical Research**: Research that involves the application of the natural sciences, especially biology and physiology, to medicine.

**Chicago**

**Specific Gravity**: The ratio of the density of a material to the density of some standard material, such as water or air, at a specified temperature.

**Encyclopedias as Topic**: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)

**Gravity, Altered**: A change in, or manipulation of, gravitational force. This may be a natural or artificial effect.

**History, 19th Century**: Time period from 1801 through 1900 of the common era.

**Morocco**: A country located in north Africa, bordering the Atlantic Ocean and the Mediterranean Sea, with a southern border with Western Sahara, eastern border with Algeria. The capital is Rabat.

**Copyright**: It is a form of protection provided by law. In the United States this protection is granted to authors of original works of authorship, including literary, dramatic, musical, artistic, and certain other intellectual works. This protection is available to both published and unpublished works. (from Circular of the United States Copyright Office, 6/30/2008)

**Physics**: The study of those aspects of energy and matter in terms of elementary principles and laws. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

**Jupiter**: The fifth planet in order from the sun. It is one of the five outer planets of the solar system. Its sixteen natural satellites include Callisto, Europa, Ganymede, and Io.

**Extraterrestrial Environment**: The environment outside the earth or its atmosphere. The environment may refer to a closed cabin (such as a space shuttle or space station) or to space itself, the moon, or other planets.

**Uranus**: The seventh planet in order from the sun. It is one of the five outer planets of the solar system. It has five known natural satellites.

**Temperature**: The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.

**Thermal Conductivity**: The heat flow across a surface per unit area per unit time, divided by the negative of the rate of change of temperature with distance in a direction perpendicular to the surface. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

**Hydrogenase**: An enzyme found in bacteria. It catalyzes the reduction of FERREDOXIN and other substances in the presence of molecular hydrogen and is involved in the electron transport of bacterial photosynthesis.

**Thermodynamics**: A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed)

**Thermoanaerobacter**: A genus of gram-positive, anaerobic bacteria in the family Thermoanaerobacteriaceae. Cultures consist of rods interspersed with coccoid cells.

**Carboxyl and Carbamoyl Transferases**: A group of enzymes that catalyze the transfer of carboxyl- or carbamoyl- groups. EC 2.1.3.

**Solutions**: The homogeneous mixtures formed by the mixing of a solid, liquid, or gaseous substance (solute) with a liquid (the solvent), from which the dissolved substances can be recovered by physical processes. (From Grant & Hackh's Chemical Dictionary, 5th ed)

**Water**: A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

**Acceleration**: An increase in the rate of speed.

**Moon**: The natural satellite of the planet Earth. It includes the lunar cycles or phases, the lunar month, lunar landscapes, geography, and soil.

**Saturn**: The sixth planet in order from the sun. It is one of the five outer planets of the solar system. Its twelve natural satellites include Phoebe and Titan.

**Spacecraft**: Devices, manned and unmanned, which are designed to be placed into an orbit about the Earth or into a trajectory to another celestial body. (NASA Thesaurus, 1988)

**Vibration**: A continuing periodic change in displacement with respect to a fixed reference. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

**Encyclopedias**

**Famous Persons**

**Dictionaries, Medical**

**Hypericum**: Genus of perennial plants in the family CLUSIACEAE (sometimes classified as Hypericaceae). Herbal and homeopathic preparations are used for depression, neuralgias, and a variety of other conditions. Hypericum contains flavonoids; GLYCOSIDES; mucilage, TANNINS; volatile oils (OILS, ESSENTIAL), hypericin and hyperforin.

**Dictionaries as Topic**: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.

**Periodicals as Topic**: A publication issued at stated, more or less regular, intervals.

**Access to Information**: Individual's rights to obtain and use information collected or generated by others.

**Office Management**: Planning, organizing, and administering activities in an office.

**Journal Impact Factor**: A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.

**Living Donors**: Non-cadaveric providers of organs for transplant to related or non-related recipients.

**Publishing**: "The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.

**Body Mass Index**: An indicator of body density as determined by the relationship of BODY WEIGHT to BODY HEIGHT. BMI=weight (kg)/height squared (m2). BMI correlates with body fat (ADIPOSE TISSUE). Their relationship varies with age and gender. For adults, BMI falls into these categories: below 18.5 (underweight); 18.5-24.9 (normal); 25.0-29.9 (overweight); 30.0 and above (obese). (National Center for Health Statistics, Centers for Disease Control and Prevention)

... (1966) A spatially homogeneous

**gravitational****field**. Proceedings of the Cambridge Philosophical Society, Volume ... General Relativity and**Gravitation**, Volume 17, No. 5. "An Eulogy - Prof. Valentine Joseph". rohanwickramaratne.**2017**-04-26. ... Joseph, Valentine (1966). "A spatially homogeneous**gravitational****field**". Proceedings of the Cambridge Philosophical Society. 62 ... Kramer, D.; Stephani, H.; MacCallum, M.; Herlt, E. (1980). Exact solutions of Einstein's**field**equations. The Pitt Building, ...The

**gravitational****field**was then similarly described. The first**field**theory of gravity was Newton's theory of**gravitation**in ... Any massive body M has a**gravitational****field**g which describes its influence on other massive bodies. The**gravitational****field**... Instead of using two vector**fields**describing the electric and magnetic**fields**, a tensor**field**representing these two**fields**... This treats**gravitation**as a geometric phenomenon ('curved spacetime') caused by masses and represents the**gravitational****field**...... found that those

**gravitational****fields**were consistent with Verlinde's theory. Using conventional**gravitational**theory, the ... In 1995, Jacobson demonstrated that the Einstein**field**equations describing relativistic**gravitation**can be derived by ... Experiments with ultra-cold neutrons in the**gravitational****field**of Earth are claimed to show that neutrons lie on discrete ... Since its results do not differ from Newtonian gravity except in regions of extremely small**gravitational****fields**, testing the ...The key observation is that in gravity the boundary data include the

**gravitational****field**, hence the geometry of the boundary, ... York, J. W. (1972). "Role of conformal three-geometry in the dynamics of**gravitation**". Physical Review Letters. 28 (16): 1082. ... 1. The**Gravitational****field**," Phys. Rev. D47, 1420 (1993) [arXiv:gr-qc/9209014].. ... the**gravitational**Lagrangian density, contains second derivatives of the metric tensor. This is a non-typical feature of**field**...Einstein realized that someone who is in free fall experiences no

**gravitational****field**. In other words,**gravitation**is exactly ... but to let mass depend on the**gravitational****field**strength φ. {\displaystyle \varphi \,}. . Allowing this**field**strength to ... is a scalar**field**, −. ∂. T. μ. ν. ∂. x. ν. =. T. 1. ψ. ∂. ψ. ∂. x. μ. {\displaystyle -{\partial T^{\mu \nu } \over \partial x ... This scalar**field**governs the motion of a free-falling particle by: d. 2. x. j. d. t. 2. =. −. ∂. φ. ∂. x. j. .. {\displaystyle ...It can be shown that any massless spin-2

**field**would give rise to a force indistinguishable from**gravitation**, because a ... observation of**gravitational**waves**Gravitational****field****Gravitational**-wave astronomy**Gravitational**wave background**Gravitational**... massless spin-2**field**must couple to (interact with) the stress-energy tensor in the same way that the**gravitational****field**does ... The sources of**gravitational**waves described above are in the low-frequency end of the**gravitational**-wave spectrum (10−7 to 105 ...To understand the gravity of Mars, its

**gravitational****field**strength g and**gravitational**potential U are often measured. Simply ... only an estimate of the Mars**gravitational**constant GM, i.e. the universal constant of**gravitation**times the mass of Mars, was ... This cycle contributes as almost the only variable accounting for changes in gravity**field**on Mars. The measured**gravitational**...**gravitational****field**and seasonal changes in the masses of the polar ice caps". Journal of Geophysical Research: Planets. 114 ( ...The

**gravitational**potential energy is the potential energy an object has because it is within a**gravitational****field**. The force ... on point mass M {\displaystyle M} exerts onto another point mass m {\displaystyle m} is given by Newton's law of**gravitation**: F ...**Gravitational**binding energy**Gravitational**potential Standard**gravitational**parameter**Gravitational**wave "**Gravitational**... It is potential energy associated with the**gravitational****field**.**Gravitational**energy is dependent on the masses of two bodies, ...... is the

**gravitational**constant, M {\displaystyle M\,} is the mass of the object creating the**gravitational****field**, R ∗ {\ ... Other theories of**gravitation**require**gravitational**redshift, although their detailed explanations for why it appears vary.[ ...**Gravitational**redshift is studied in many areas of astrophysical research. A table of exact solutions of the Einstein**field**... To calculate the changes in frequency in a nearly static**gravitational****field**, only the time component of the metric tensor is ...In general relativity, the energy of the

**gravitational****field**feeds back into creation of the**gravitational****field**. This makes ... Rather, it is predicted by any theory of**gravitation**that respects the principle of equivalence. Newtonian**gravitation**is a ... Is this really possible? In a nonuniform**gravitational****field**, experiment dictates that the answer is no.**Gravitational****fields**... Even in Newtonian gravity, the**gravitational****field**is associated with an energy, E = mgh, called the**gravitational**potential ...... the EFE reduce to Newton's law of

**gravitation**where the**gravitational****field**is weak and velocities are much less than the speed ... then the**field**equations are also referred to as the vacuum**field**equations. By setting Tμν = 0 in the trace-reversed**field**... These equations are used to study phenomena such as**gravitational**waves. The Einstein**field**equations (EFE) may be written in ... The equations in contexts outside of general relativity are still referred to as the Einstein**field**equations. The vacuum**field**...For a non-spinning massive object, where the

**gravitational****field**can be expressed with the Schwarzschild metric, the ISCO is ... Misner, Charles; Thorne, Kip S.; Wheeler, John (1973).**Gravitation**. W. H. Freeman and Company. ISBN 0-7167-0344-0. ...Polishchuk, Rostislav (2006-04-02). "Russian TV shows anti-

**gravitation**engine created in defiance of official science". NTV. ... mobile equipment on**gravitational**principles; and psychophysical and biomedical influence on troops and the population" The ... A torsion**field**(also called axion**field**, spin**field**, spinor**field**, and microlepton**field**) is a feature of a pseudoscientific ... Spinor**fields**, in particular fermionic**fields**, are existing concepts from particle physics and quantum**field**theory. Aside from ...For motion in the

**gravitational****field**a spherically symmetric massive object of mass M {\displaystyle M} , the dimensionless ... C. W. Misner, K. S. Thorne and J. A. Wheeler,**Gravitation**(1973) Freeman and co. W. Rindler, Relativity, Special, General and ...**gravitational**lensing which is identical to Einstein's formula for weak**gravitational**lensing using GR, and light travel ( ... Unlike general relativity, RND is not restricted solely to a**gravitational**potential and does not require the exigency of ...... also known as non-

**gravitational****field**is an idea of creating a place or object that is free from the force of ... Another effort in the private sector to master understanding of**gravitation**was the creation of the Institute for**Field**Physics ...**field**in a fashion similar to the magnetic**field**created by the Barnett effect. No independent testing or public demonstration ... since any spacetime geometry is a solution of the**field**equations for some configuration of the stress-energy tensor**field**(see ...Carroll has worked on a number of topics in theoretical cosmology,

**field**theory, and**gravitation**theory. His research papers ... His most-cited work, "Is Cosmic Speed-Up Due To New**Gravitational**Physics?", was written with Vikram Duvvuri, Mark Trodden, and ... Carroll received his PhD in astronomy and astrophysics in 1993 from Harvard University, where his advisor was George B.**Field**. ... His dissertation's title is "Cosmological Consequences of Topological and Geometric Phenomena in**Field**Theories". He worked as ..."Toward a

**field**theory of**gravitation**". Nuovo Cimento B. 107 (8): 941-960. Bibcode:1992NCimB.107..941Y. doi:10.1007/BF02899296 ... and many strong gravity**field**astrophysical phenomena-such as**gravitational**radiation-require the interactive N-body solutions ... In recent years he became known for alternative theories of**gravitation**. He was a physics professor at University of Maryland, ... Alley maintained the validity of the Yilmaz Theoryand remained active in the study of**gravitation**until his death. Carroll O. ...The bibliography has a long list of original sources and other notable books in the

**field**. The level of the book is advanced, ... The book also uses geometrized units, the**gravitational**constant G and speed of light in vacuum c each set to 1. The back ...**Gravitation**is a physics book on Einstein's theory of gravity, written by Charles W. Misner, Kip S. Thorne, and John Archibald ... "Juryoku riron :**Gravitation**koten rikigaku kara sotaisei riron made jiku no kikagaku kara uchu no kozo e. (Japanese)". amazon. ...Classical theories of

**gravitation**General relativity Brans-Dicke theory Horndeski, Gregory Walter (1974-09-01). "Second-order ... Lombriser, Lucas; Taylor, Andy (2016-03-16). "Breaking a Dark Degeneracy with**Gravitational**Waves". Journal of Cosmology and ... Inflation with the most general second-order**field**equations". Progress of Theoretical Physics. 126 (3): 511-529. arXiv: ... "Speed of**Gravitational**Waves and the Fate of Scalar-Tensor Gravity". Physical Review D. 95 (8): 084029. arXiv:1608.01982 . ...Specifically, curvature (the

**gravitational****field**) might arise as a kind of "averaging" over very complicated topological ... Wheeler and Misner developed this into the so-called already-unified**field**theory which partially unifies**gravitation**and ... It attempts to realize three concepts: mass without mass charge without charge**field**without**field**. He wanted to lay the ... This would realize geometrical intuition suggested by quantum gravity, or**field**without**field**. These ideas captured the ...ISBN 0-06-053108-8. See the other articles on General relativity,

**Gravitational****field**,**Gravitational**wave, etc Colosi, D.; et ... the theory would reduce to general relativity and conform to Newton's law of**gravitation**in the weak-**field**limit. The term ... because a massless spin-2**field**would couple to the stress-energy tensor in the same way that**gravitational**interactions do. As ... the graviton is a hypothetical elementary particle that mediates the force of**gravitation**in the framework of quantum**field**...General relativity predicts

**gravitational**waves, as does any theory of**gravitation**in which changes in the**gravitational****field**... which has a very high**gravitational****field**. Initial attempts to measure the**gravitational**redshift of the spectrum of Sirius-B, ... the bending of light in**gravitational****fields**, and the**gravitational**redshift. The precession of Mercury was already known; ... which are all held together by their**gravitational**attraction) should follow the same trajectories in a**gravitational****field**, ...In

**gravitational****fields**, escape velocity refers to the escape velocity of zero mass test particles relative to the barycenter ... At a distance r from the centre of**gravitation**the body feels an attractive force F = G M m r 2 . {\displaystyle F=G{\frac {Mm ... For an object of mass m {\displaystyle m} the energy required to escape the Earth's**gravitational****field**is GMm / r, a function ... is the initial speed required to go from an initial point in a**gravitational**potential**field**to infinity and end at infinity ...This suggests similarities between the electric

**field**E and the**gravitational****field**g, or their associated potentials. Mass is ... is similar to Newton's law of universal**gravitation**: F = m ( − G M r ^ , r , 2 ) = m g {\displaystyle \mathbf {F} =m\left(-GM{\ ... Electrodynamic**fields**are E-**fields**which do change with time, for instance when charges are in motion. The electric**field**... This aura is the electric**field**due to the charge. The electric**field**is a vector**field**... and has a magnitude and direction." ...... known as strong

**field**tests). It was also heralded as inaugurating a new era of**gravitational**-wave astronomy, which will enable ... It is expected to be massless if, as it appears,**gravitation**has an infinite range. (This is because the more massive a gauge ...**Gravitational**-wave astronomy**Gravitational**-wave observatory The ringdown phase is the settling down of the merged black hole ... Play media**Gravitational**waves can be detected indirectly - by observing celestial phenomena caused by**gravitational**waves - or ...He pioneered the

**field**of quantum computation by being the first person to formulate a description for a quantum Turing machine ... known for his contributions in**gravitational**physics and astrophysics and also for the popular science book, Black Holes and ... the first to suggest that**gravitation**might be a manifestation of an underlying geometry, and coiner of the expression "mind- ... "Outside the**field**of scientific research, he was known for his outspoken atheism: belief in God, he once declared, is not only ...Valentine Joseph (1966) A spatially homogeneous

**gravitational****field**. Proceedings of the Cambridge Philosophical Society, Volume ... General Relativity and**Gravitation**, Volume 17, No. 5. "An Eulogy - Prof. Valentine Joseph". rohanwickramaratne.**2017**-04-26. ... Joseph, Valentine (1966). "A spatially homogeneous**gravitational****field**". Proceedings of the Cambridge Philosophical Society. 62 ... Kramer, D.; Stephani, H.; MacCallum, M.; Herlt, E. (1980). Exact solutions of Einsteins**field**equations. The Pitt Building, ...... object can be affected either by an attractive

**gravitational****field**or repulsive. The case when**gravitational**forces of opposite ... Moreover, the**gravitational**force does not change at all during the eclipses of the Sun, nor during the eclipse of the Moon, ... If the**gravitational**forces can be both attracting and repulsive, then the conclusion is quite logical that these forces of ... A. L. Dmitriev1 & E. M. Nikushchenko Expulsion of Plasma in A**Gravitational****Field**URL: http://dx.doi.org/10.5539/apr.v8n2p38. ...To find what you would weigh in the

**gravitational****field**of another planet, multiply your weight on Earth times the**gravitation**...Is there any empirical evidence that electromagnetic radiation produces

**gravitational****fields**? I understand that as a form of ... whereas the**gravitation**of EMR is an implicit assumption of the. stressenergy tensor in EFE) ? ... But a similar**gravitational****field**. detector would detect a**gravitational****field**outside the atom. It is. this**field**that ... with the external**gravitational****fields**is the**gravitational****field**. produced by the mass M of the atom. Therefore, it is ...2. Hybrid LSSVR-

**Gravitation**Search Algorithm (HLGSA) Method for River Flow Prediction. 2.1. LSSVR. LSSVR introduced by Suykens ... The M5RT is a piecewise linear method that was introduced by Quinlan [61] and has many successful applications in the**field**of ... With the help of (9), the total**gravitational**force exerted on the agent in the kth dimension can be calculated as. Then the ... The total**gravitational**acceleration of the th agent can be calculated using the law of motion as follows:. where represents ...... describing space-time in a weak

**field**approximation [11]:. [Here is the**gravitational**constant, is the velocity of light, is ... D.**Gravitation**, Astrophysics, Cosmology, vol. 24, no. 11, Article ID 1530027, 23 pages, 2015. View at Publisher · View at ... We point out that, in (5), we introduce the following expression for electron passive**gravitational**mass operator:. which is ... in the Earths**gravitational****field**. [Here is a hydrogen atom typical "size" (i.e., Bohrs radius) and is the Earths radius.] ...Chatziioannou, K., Klein, A., Yunes, N. & Cornish, N., Sep 27 2013, In : Physical Review D - Particles,

**Fields**,**Gravitation**and ...**Gravitational**wave memory in ΛcDM cosmology. Bieri, L., Garfinkle, D. & Yunes, N., Sep 28**2017**, In : Classical and Quantum ...**Fields**,**Gravitation**and Cosmology. 90, 8, 084016.. Research output: Contribution to journal › Article ...**Gravitational**-wave mediated preheating. Alexander, S., Cormack, S., Marcianò, A. & Yunes, N., Apr 9 2015, In : Physics Letters ...The

**gravitational****field**was then similarly described. The first**field**theory of gravity was Newtons theory of**gravitation**in ... Any massive body M has a**gravitational****field**g which describes its influence on other massive bodies. The**gravitational****field**... Instead of using two vector**fields**describing the electric and magnetic**fields**, a tensor**field**representing these two**fields**... This treats**gravitation**as a geometric phenomenon (curved spacetime) caused by masses and represents the**gravitational****field**...Einstein realized that someone who is in free fall experiences no

**gravitational****field**. In other words,**gravitation**is exactly ... but to let mass depend on the**gravitational****field**strength φ. {\displaystyle \varphi \,}. . Allowing this**field**strength to ... is a scalar**field**, −. ∂. T. μ. ν. ∂. x. ν. =. T. 1. ψ. ∂. ψ. ∂. x. μ. {\displaystyle -{\partial T^{\mu \nu } \over \partial x ... This scalar**field**governs the motion of a free-falling particle by: d. 2. x. j. d. t. 2. =. −. ∂. φ. ∂. x. j. .. {\displaystyle ...... we used these observations to perform a test of the

**gravitational**theory using orbital dynamics in a strong**gravitational****field**... tests of**gravitation**have been first performed in the Solar System and in laboratories on Earth where extremely good accuracy ... In these low**gravitational****fields**, the agreement between General Relativitys predictions and observations is extremely good. ... It is therefore highly interesting to perform such tests in other environments, such as in strong**gravitational****fields**.. The ...Graviton and

**Gravitational****Fields**. *Law of Conservation of**Gravitation**. *General symmetric Dynamics ... Inertial mass and**gravitational**mass; 9.**Gravitational****field**and acceleration; 10 Mass and energy; 11. "aether", expansion of ... with the classic**field**descriptions of the**gravitation**(the GR). In addition, this approach is shown useful in solving the ... quantum**field**theory, point particles, 38) unified**field**theory, 39) Riemann hypothesis. Category: History and Philosophy of ...As long as there are no nother interactions than

**gravitation**, this trajectory is a light-like geodesic in spacetime and can be ... Similar Discussions: Bending of light in a**gravitational****field*** Can light be redshifted by**gravitational****fields**? (Replies: 13 ... How does light bend under**gravitational****field**(**gravitational**force), why? (Replies: 2) ... an observer in a lift in free-fall in a uniform**gravitational****field**and an observer at rest in the uniform**gravitational****field**...... when

**gravitational****fields**are not too strong.. General Relativity itself is also an effective theory. It has yet to be ... So, in the same way that Newtonian**gravitation**is an effective theory that is often a valid and useful approximation of General ... Its a common misconception that my theory of General Relativity proved Newtonian**gravitation**"wrong". That paints a misleading ... Science has no problem with Einsteins**gravitation**- its a perfectly great (and beautiful) theory, confirmed by all ...David, Rey (2012) Similarity Assessments, Spacetime, and the

**Gravitational****Field**: What Does the Metric Tensor Represent in ... Weatherall, James Owen (2015) Are Newtonian**Gravitation**and Geometrized Newtonian**Gravitation**Theoretically Equivalent? [ ... Weatherall, James Owen (2014) Are Newtonian**Gravitation**and Geometrized Newtonian**Gravitation**Theoretically Equivalent? [ ... Morgan, Peter (2002) Classical nonlocal models for quantum**field**states. [Preprint] Muntean, Ioan (2014) Genetic Algorithms in ...First, drag a positive or negative charge (or both) onto the

**field**. The simulation allows you to… ... learners move charges around a simulated electric**field**to determine how certain variables affect interactions among charged ... Forces at a distance are explained by**fields**(**gravitational**, electric, and magnetic) permeating space that can transfer energy ... Use mathematical representations of Newton's Law of**Gravitation**and Coulomb's Law to describe and predict the ...Relation Between the

**Gravitational**and Magnetic**Fields**. Authors: Jose Garrigues Baixauli. Comments: pages 8, figures 4, J Phys ...**Gravitation**Question on Perihelion Advance. Authors: D.H.W. Reffer. Comments: 2 Pages. Inescapable question ... Using that result, calculated times of the year**2017s**solstices and equinoxes differ from published values by less than five ... Drift and Diffusive Streams of Molecules of an Ideal Gas in a**Gravitational****Field**. V.S. Vasilenko, A.a. Malgota. Authors: V.S. ...... the authors write that the reader may wonder how a

**gravitational**anomaly could be relevant in the absence of**gravitation**; but ... and find that the**gravitational**anomaly coefficient is still nonzero"; but which is more like, "consider this**field**theory in ... It is hard to be precise, if you are not an expert in the**field**and have to talk to experts who are unable to express ... While the**field**theories that have classical AdS duals are rather special, we can still learn important qualitative insights ...UPSEE

**2017**is one of the most important engineering entrance exams listed on the academic calendar year. Get complete syllabus ...**Gravitation**:**Gravitational****field**, Keplers laws and motion of planets, planetary and satellite motion, geostationary satellite. ... Magnetic Effect of Current: Magnetic**field**due to current, Biot-Savarts law, magnetic**field**due to solenoid, motion of charge ... Electrostatics: Coulombs law, electric**field**and potential due to point charge, dipole and its**field**along the axis and ...Research on

**Gravitational****Field**. PDF Call for Papers , HTML Call for Papers. Guest Editor: EditorBoard: Manuscript Due: May ... Research on**Gravitation**, Astrophysics and Cosmology. PDF Call for Papers , HTML Call for Papers. Guest Editor: EditorBoard: ...**Gravitational****Field**and Its Application. PDF Call for Papers , HTML Call for Papers. Guest Editor: EditorBoard: Manuscript Due ...**Gravitational****Field**. PDF Call for Papers , HTML Call for Papers. Guest Editor: EditorBoard: Manuscript Due: July 24th, 2014. ...**Gravitational**potential is "locked up" electromagnetic

**field**while an EM

**field**is "unlocked

**gravitational**potential." ... Unfortunately, Einsteins view of EM approximated the classical view, in which EM and

**gravitation**are mutually exclusive. That ... In 1968 Sakharov pointed out that

**gravitational**

**field**is not actually a primary

**field**of nature. Instead, it is always a ... The

**gravitational**

**field**closure is slow and weak, and it is that closure which results in the so-called external physical ...

First-in-

**field**biomaterials-based innovations introduced by BIORECAR will enable more effective regeneration of functional ... The aim of the DarkGRA project is to investigate novel effects related to strong**gravitational**sources -such as black holes ( ... This groundbreaking research program -located at the interface between particle physics, astrophysics and**gravitation**- is now ... First-in-**field**biomaterials-based innovations introduced by BIORECAR will enable more effective regeneration of functional ...Summary I propose a program of research that may forever change the way that we understand and use quantum

**field**theory to make ... The aim of the DarkGRA project is to investigate novel effects related to strong**gravitational**sources -such as black holes ( ... This groundbreaking research program -located at the interface between particle physics, astrophysics and**gravitation**- is now ... I propose a program of research that may forever change the way that we understand and use quantum**field**theory to make ...I would simply enjoin that the electric/magnetic

**fields**, nuclear**fields**, Casmir**fields**, light, and**gravitation**are all ...**fields**. Furthermore, the centroid of a light**field**is associated inseparably with the centroid of the**gravitational****field**, as ... If the**field**is viewed rather as a unit [unity], then the experience of the**field**periphery and the**field**centroid are ... The difference in this case is that you are looking at an object under the influence of the**gravitational****field**, whereas I am ...Probing Strong

**Field**Gravity Through Numerical Simulations Chapter for the book: General Relativity and**Gravitation**: A ... Loud and Bright:**gravitational**and electromangetic energy output from compact binaries,**Gravitational**Waves: Revolution in ...**Gravitational**Wave Signatures of Highly Compact Boson Star Binaries. C. Palenzuela, P. Pani, M. Bezares, V. Cardoso, L. Lehner ...**Gravitational**action with null boundaries. Luis Lehner, Robert C. Myers, Eric Poisson, Rafael D. Sorkin. Phys. Rev. D 94, ...... a better understanding of the

**gravitational****field**of Mercury and its state of rotation, a test of general relativity and the ... securing its state of rotation and its internal structure or testing theories of**gravitation**. The three research projects are ... Juno will produce global maps of gravity and magnetic**fields**, and will study the atmospheric composition, by means of a polar ... objectives such as determining the gravity**field**of a planet, ... to be launched in**2017**, whose objective is the in-depth ...Measured gravitational waves2018General Relativity and GravitationPhysicsSpacetimeDirect detection of gravitational wavesLIGOUpcoming gravitational wave detectors2019EquationsHomogeneousEinstein'sStrong gravitational fieldsUniversal gravitationAstronomyDetectorsTime-varying graviDetectionBlack holesRelativity and GravitationGravityMergerOrbitalEquivalenceParticlesObservationsRadiationMagneticTheories of gravitatDetectionsSimulationsInteractionsBehaviorEarth'sEinsteinPhysScalarOscillationsElectromagnetismWeakTorsion fieldVirgoRedshiftUniformForcesWaveFundamentalINTERACTION

- Sabine Hossenfelder: Backreaction: Have we really measured gravitational waves? (blogspot.com)
- Have we really measured gravitational waves? (blogspot.com)

- The Center for Relativity and Gravitation at Beijing Normal University has one post-doctoral position opening from September 2018 in the areas of quantum gravity and quantum cosmology. (uni-frankfurt.de)
- In July 2018 CP3 members have joined the Virgo Collaboration at the European Gravitational Observatory (EGO) near Pisa in Italy. (uclouvain.be)
- Fundamental research in gravitational wave experimental physics was funded for the first time in Belgium at the end of 2018 with a project led by UCLouvain and ULiege. (uclouvain.be)

- General Relativity and Gravitation, Volume 17, No. 5. (wikipedia.org)
- General Relativity and Gravitation. (wikipedia.org)

- From the school physics course we know that it is the mass that generates gravitational forces, not the prohibition of quantum mechanics, and the magnitude of these forces depends directly on the magnitude of the mass. (thunderbolts.info)
- There is no controversy in physics today regarding the equivalence of mass (with its gravitational field) and energy. (physicsforums.com)
- The first field theories, Newtonian gravitation and Maxwell's equations of electromagnetic fields, developed in classical physics before the advent of relativity theory in 1905, and had to be revised to be consistent with that theory. (wikipedia.org)
- In physics , theories of gravitation postulate mechanisms of interaction governing the movements of bodies with mass. (wikipedia.org)
- Our current understanding of fundamental physics is based on four interactions: electromagnetism, the weak interaction, the strong interaction and gravitation. (2physics.com)
- The first three ones are unified in a common framework, the Standard Model of particle physics based on a relativistic quantum field theory. (2physics.com)
- OT: could topological physics be the field to finally provide further insights and discoveries to break out from the stagnated situation on particle physics? (columbia.edu)
- Bhattacharya works in the emerging field of levitated optomechanics, an area of physics that investigates nanoparticles by trapping them in a laser beam. (rit.edu)
- The Max Planck Institute for Gravitational Physics (Albert Einstein Institute, AEI) is a leading research institute in the world specializing in gravitational physics. (uni-frankfurt.de)
- My research involves using analytical perturbative methods in black hole physics, alternative theories of gravity as well as more experimental gravitation like that required for global navigation satellite systems. (ucd.ie)
- I have broad interests in gravitational physics, including astrophysics and gravitational wave observations, and more theoretical questions. (mpg.de)
- The current generation of philosophers of physics takes quantum mechanics very seriously, and they have done crucially important work in bringing conceptual clarity to the field. (uncommondescent.com)
- Applications are invited for one or more PhD positions in gravitational-wave and multi-messenger astrophysics at Perimeter Institute for Theoretical Physics and the University of Guelph, to start Fall 2020 or earlier. (aas.org)

- Since the localized energy density of spacetime is essentially synonymous with gravitational potential, they threw out the ability to turn EM force field energy into gravitational potential energy. (weebly.com)
- In general relativity, this remaining precession , or change of orientation of the orbital ellipse within its orbital plane, is explained by gravitation being mediated by the curvature of spacetime. (wikipedia.org)
- Fletcher, Samuel C. and Manchak, John Byron and Schneider, Mike D. and Weatherall, James Owen (2017) Would Two Dimensions be World Enough for Spacetime? (ijqf.org)
- These equations determine how black holes warp the spacetime around them and thus emit gravitational waves that can be observed with detectors such as LIGO, Virgo, and GEO600. (mpg.de)
- LITG is the limit of covariant theory of gravitation , when it is possible neglect the influence of gravitational field on propagation of wave quanta and results of spacetime measurements. (wikiversity.org)

- For the direct detection of gravitational waves you have to measure the deformation of space and time that they cause. (blogspot.com)
- The first direct detection of gravitational waves was made by the LIGO collaboration in September 2015. (blogspot.com)
- They indicated the direct detection of gravitational waves from merging black holes, teaching us about a new population of stellar remnants, confirming the existence of gravitational waves, and showcasing yet another victory for Einstein's General Relativity. (scienceblogs.com)
- 14 in 2015, the first direct detection of gravitational waves was done by the detectors in USA. (nii.ac.jp)

- He told me that besides the grumpy particle physicist there were also several gravitational wave people who have issues with what I have written about the supposed gravitational wave detections by the LIGO collaboration. (blogspot.com)
- This first signal measured by LIGO looks like a textbook example of a gravitational wave signal from a merger of two black holes. (blogspot.com)
- But it all rests on one critical assumption: that what LIGO detected was a gravitational wave signal, not just noise in the detector. (scienceblogs.com)
- There's a new debate brewing surrounding gravitational waves, and while LIGO isn't giving the new analysis much credence, the importance of getting it right, publicly, is too great to ignore. (scienceblogs.com)
- It required several months of analyses by the scientists at LIGO and their colleagues in the Virgo collaboration (formed around the eponymous European detector) to confirm the existence of gravitational waves, a century after they were predicted by Albert Einstein in his general theory of relativity. (cnrs.fr)
- Attracted very early on by the detection of gravitational waves and by the scale of the scientific and instrumental challenges involved, he called upon other instrumentation specialists (Catherine-Nary Man) and experts in gravitation (Philippe Tourrenc and Jean-Yves Vinet), while his team trained scientists including David Shoemaker and Peter Fritschell, who now play a major role in the LIGO collaboration. (cnrs.fr)
- When the LIGO instruments detected gravitational waves for the first time on September 14, 2015, we quickly knew that black holes were the source of the signal," says Dr. Frank Ohme, leader of the Max Planck Independent Research Group. (mpg.de)
- After several years of instrument upgrades, Virgo went in observation mode in August 2017, about one year and half after the two LIGO interferometers in the US had detected for the first time gravitational waves. (uclouvain.be)
- CP3 members are also actively supporting the Einstein Telescope project, a proposed underground laser interferometer project for gravitational wave detection that is expected to take over from LIGO and Virgo around 2030. (uclouvain.be)

- Tests of alternative theories of gravity and how to do so with upcoming gravitational wave detectors. (perimeterinstitute.ca)

- Rev. D 100, 083506 (2019)] where the underlying gravitational theory is developed in detail. (imperial.ac.uk)

- A classical field theory is a physical theory that predicts how one or more physical fields interact with matter through field equations. (wikipedia.org)
- They threw out the interaction and entanglement of EM and gravitation, and wrote equations only for the special case in Maxwell's theory wherein gravity and electromagnetics do not interact. (weebly.com)
- James Clerk Maxwell's equations describe how an electromagnetic field changes from place to place and from moment to moment. (weebly.com)
- Inserting a varying Lambda in Einstein's field equations can be made consistent with the Bianchi identities by allowing for torsion, without the need to add scalar field degrees of freedom. (imperial.ac.uk)
- In the minimal such theory, Lambda is totally free and undetermined by the field equations in the absence of matter. (imperial.ac.uk)
- and Yosef Zlochower, RIT associate professor, which solved Albert Einstein's strong field equations. (scienmag.com)
- Second, as the effective field dynamics of the micro-constituents must eventually obey Einstein's field equations, a sub-quantum interaction law is derived from a solution of these equations. (mdpi.com)
- Be able to apply the concepts of electric and magnetic field including Maxwell's equations to engineering applications and problem solving. (amrita.edu)
- This follows from the similarity of the basic equations of these theories, descriptions of field with the two potentials and two strengths, the same degree of covariance under coordinate transformations between two frames of reference (see also Maxwell-like gravitational equations ). (wikiversity.org)
- However, Maxwell used gravitational equations on the basis of mechanical analogies and he could not understand the reason for the negativity of static gravitational field energy and flux of gravitational energy, and therefore did not pursue further the theory in this direction. (wikiversity.org)

- Valentine Joseph (1966) A spatially homogeneous gravitational field. (wikipedia.org)
- Is a correct statement of the general principle of relativity that a reference frame in a homogeneous gravitational field is equivalent to a uniformly accelerating reference frame? (physicsforums.com)
- The constant homogeneous gravitational field is investigated. (scirp.org)

- On the basis of the solution of the Einstein's equation for a weak gravitational field, the flux of gravitational radiation energy from system of cooperating masses is found. (scirp.org)
- On the basis of refusal from a stresses tensor into energy-impulse tensor and use of a quantum gravitational eikonal, the quantum form of the energy-impulse tensor in Einstein's equation is found. (scirp.org)

- It is therefore highly interesting to perform such tests in other environments, such as in strong gravitational fields. (2physics.com)
- Classical Newtonian mechanics (1687), thermodynamics (1850), and classical electrodynamics (1864) did a wonderful job of describing the everyday world at the close of the 19th century, but early in the 20th century it became apparent that the models upon which these very successful theories were based did not work very well for small things like atoms or for objects moving at high velocities or in strong gravitational fields. (blogspot.com)

- The existence of the gravitational constant was explored by various researchers from the mid-17th century, helping Isaac Newton formulate his law of universal gravitation. (wikipedia.org)
- From the time of his stay at the Cavendish Laboratory, Poynting performed painstaking experiments to measure the mean density of the earth or, equivalently, the constant of universal gravitation. (encyclopedia.com)

- I think we're opening a window on the universe -- a window of gravitational wave astronomy. (scienceblogs.com)
- Scientists will gain a deeper understanding of astrophysical phenomena by combining gravitational wave astronomy with traditional methods using the electromagnetic spectrum. (scienmag.com)
- Their 'moving puncture approach' has been adopted by other research groups and helped lay the foundation for gravitational wave astronomy. (scienmag.com)
- My current research is mainly motivated by the promises of gravitational-wave astronomy. (southampton.ac.uk)
- Led by Dr. Frank Ohme, the Max Planck Independent Research Group "Binary Merger Observations and Numerical Relativity" will study collisions of black holes and neutron stars through sophisticated computer simulations, exploring some the fundamental questions in the new field of gravitational-wave astronomy over the next five years. (mpg.de)
- This strengthens and broadens our research and positions us even better in the new era of gravitational-wave astronomy. (mpg.de)

- Gravitational waves travel at the speed of light, so if one comes through, it should trigger both detectors with a small delay that comes from the time it takes the wave to travel from one detector to the other. (blogspot.com)
- We now have, for the first time, three advanced gravitational wave detectors observing together. (scienmag.com)
- Through his work on stabilized lasers, Alain Brillet, a visionary in the development of gravitational wave detectors, is one of the fathers of Europe's Virgo instrument. (cnrs.fr)
- The theoretical work of Thibault Damour, a specialist in black holes and gravitational waves, played a decisive role in the analysis of data from the gravitational wave detectors. (cnrs.fr)

- Alternative derivations of the time relationship not involving a time-varying gravitational "constant" are obtained by intercomparison of various large numbers. (springer.com)

- The new detection also cites a 2017 paper written by Lousto and James Healy, RIT postdoctoral researcher, and a 2014 paper by Lousto and Zlochower studying extreme black hole spins and mass ratios. (scienmag.com)
- Virgo is the European laser interferometer for gravitational wave detection. (uclouvain.be)

- Therefore, if the holographic principle is true, one can create actual quantum black holes by engineering the non-gravitational systems on an optical lattice. (ijqf.org)

- Educating the next generation of gravitational wave astronomers is taken seriously at RIT's Center for Computational Relativity and Gravitation. (scienmag.com)

- When Isaac Newton saw an apple fall from a tree he tried to explain it and his answer was the law of gravity , only his hypothesis was flawed and science still hasn't resolved Newton, Einstein and gravitation. (inrng.com)
- Note that the concept of the mass potentials is a unifying field concept, for unifying gravity and EM fields. (weebly.com)
- What is the difference between the 'implosion field' and the 'gravity field' of the planet? (thunderbolts.info)
- While I disavow that gravity moves at c, I do hold that both gravitational and light field act instantaneously across the space defined by their local [unified] fields. (thunderbolts.info)
- Critical collapse of a scalar field in semiclassical loop quantum gravity. (perimeterinstitute.ca)
- The possibility of having artificial gravity is tantalizing, but it is predicated on the existence of negative gravitational mass. (scienceblogs.com)
- We presently don't have artificial gravity in space because there's no such thing as a negative gravitational mass. (scienceblogs.com)
- Radio-science means the achievement of scientific objectives by analysing the tracking data from an interplanetary probe - objectives such as determining the gravity field of a planet, securing its state of rotation and its internal structure or testing theories of gravitation. (unipi.it)
- Juno will produce global maps of gravity and magnetic fields, and will study the atmospheric composition, by means of a polar orbit with an extremely close pericentre. (unipi.it)
- GR predictions have been tested in other ways (the geodetic effect and frame-dragging by Gravity Probe B, gravitational lensing, etc.) and has not yet been falsified. (scienceblogs.com)
- Electromagnetic and gravitational forces also run, with gravity dominating at high energies as expected. (vixra.org)
- Ramadhan, Handhika 2017-08-09 00:00:00 We construct solutions of higher-dimensional Einstein gravity coupled to nonlinear $$\sigma $$ σ -model with cosmological constant. (deepdyve.com)
- Since September 2017 I have been a postdoc at the AEI in Potsdam-Golm, joint between the Astrophysical and Cosmological Relativity and the Quantum Gravity and Unified Theories divisions. (mpg.de)
- Sure, all those things that fall together in a gravity field experience similar-ratio mass changes, but GR requires their ratio of mass, to that of the planet, ALSO to be unchanged. (thenakedscientists.com)
- They will be embedded in a unique combination of Perimeter's strong gravity community, the newly established Gravitational Waves Initiative, as well as the Astrophysics and Gravitation Group at the University of Guelph. (aas.org)
- Conformal block method for construction of global solutions in gravity is developed for arbitrary two-dimensional metrics admitting one Killing vector field. (mathnet.ru)
- M. O. Katanaev, "Effective action for scalar fields in two-dimensional gravity", Ann. (mathnet.ru)
- The asymptotic safety program builds on a high-energy completion of gravity based on the Reuter fixed point, a non-trivial fixed point of the gravitational renormalization group flow. (frontiersin.org)

- Rochester Institute of Technology researchers helped pinpoint the precise location of a gravitational wave signal - and the black hole merger that produced it - detected by gravitational wave observatories in the United States and in Europe. (scienmag.com)
- The source of the gravitational waves was the merger of the massive black hole binary of mass about 30 solar mass. (nii.ac.jp)
- Visualization of gravitational waves emitted by the merger of two neutron stars to a black hole. (mpg.de)
- Since the start of 2017 he has been leading the Max Planck Independent Research Group "Binary Merger Observations and Numerical Relativity" at the AEI in Hannover. (mpg.de)

- The amplitude of the gravitational waves in the orbital plane of the binary system is shown as a deformation of a plane, similar to ripples in a pond. (mpg.de)
- We find that BH photon hair implants can encode orbital angular momentum (OAM) and vorticity of the electromagnetic (EM) field. (mdpi.com)

- Response to: Comment on "Does the Equivalence between Gravitational Mass and Energy Survive for a Composite Quantum Body? (hindawi.com)
- Comment on "Does the Equivalence between Gravitational Mass and Energy Survive for a Composite Quantum Body? (hindawi.com)

- But gravitational mass has only been measured for the particles, never for the antiparticles. (scienceblogs.com)
- At the level of elementary particles strong gravitation influences the scattered matter, forming objects, containing different amounts of substance . (wikiversity.org)
- In the 17th, 18th, and 19th centuries, physicists mistakenly thought that they were actually discovering the fundamental laws of the Universe, which they thought were based upon real tangible things like particles, waves, and fields. (blogspot.com)
- Force is caused by a change in momentum which is in turn caused by the exchange of particles or fields. (thenakedscientists.com)
- The speed at which one object can exert a force on another is determined by the speed of those particles or fields. (thenakedscientists.com)
- The upper speed limit to anything we know of is the speed of light, since both fields and particles obey special relativity. (thenakedscientists.com)
- Your particles that begin rotating out of a gravitational effect are far from doing so, and it is your only motion that is not directed towards or away from a center. (sciencechatforum.com)
- The fact that particles can pop in and out of existence, over time, as those fields rearrange themselves, is not a whit more mysterious than the fact that fists can pop in and out of existence, over time, as my fingers rearrange themselves. (heavenforum.org)
- Measurements of mass generally use gravitation (F=mg), in which ether particles or some such push against the kettle. (blogspot.com)

- In these low gravitational fields, the agreement between General Relativity's predictions and observations is extremely good. (2physics.com)
- The predictions for the emission of gravitational waves fit exactly on the observations. (blogspot.com)
- This innovative area performed the follow-up observations by X-ray, optical radiation, neutrino and data analysis simultaneously with the gravitational wave observations. (nii.ac.jp)
- The Albert Einstein Institute in Hannover plays a central role in the analysis and interpretation of the ground-breaking observations of gravitational waves. (uni-frankfurt.de)
- In astrophysics, I have recently become interested in using gravitational wave observations of neutron star binaries to extract information about their internal structure. (mpg.de)
- By combining our simulations with future observations of gravitational waves from colliding neutron stars we will get entirely new insights into these fascinating objects," says Ohme. (mpg.de)

- Hello, Is there any empirical evidence that electromagnetic radiation produces gravitational fields? (physicsforums.com)
- The law of electromagnetic radiation frequency change in this gravitational field is shown. (scirp.org)
- The effective fluid related to the non-minimally coupled scalar field differs from the other cosmological fluids of radiation by its very particular anisotropic pressure and we are studying its impact on the CMB anisotropies by modifying the CAMB code. (uclouvain.be)
- Once these fluctuations entered the sound horizon of the cosmic plasma, the gravitational attraction in over-dense regions was balanced by the radiation pressure of photons, which led to propagating acoustic oscillations. (aip.de)

- Forces at a distance are explained by fields (gravitational, electric, and magnetic) permeating space that can transfer energy through space. (compadre.org)
- electric charges or changing magnetic fields cause electric fields. (compadre.org)
- I would simply enjoin that the electric/magnetic fields, nuclear fields, Casmir fields, light, and gravitation are all manifestations of the one [universal and unified] centropic pressure field. (thunderbolts.info)
- However, the underlying production mechanism is not understood, except that its efficiency must be greatly enhanced by magnetic fields that redirect some cosmic rays from ingoing to outgoing before they interact. (arxiv.org)
- In electricity and magnetism the topics are Coulomb's law, electric fields, potential and potential difference, Ohm's law, circuits, resistances in series and parallel, Kirchhoff's laws, magnetic fields and their sources, and forces produced by magnetic fields. (ufv.ca)
- The electric and magnetic fields in these waves are related by the defined value of the characteristic impedance of vacuum Z 0 . (newworldencyclopedia.org)
- Klimenko, KG, "Does there arise a significant enhancement of the dynamical quark mass in external magnetic field? (mathnet.ru)
- Taking into account the coefficients used in accordance with their system of physical units in his writings in 1893 Heaviside gave correct expression for the curl of gravitational quantity, similar in the sense to the magnetic field in electrodynamics. (wikiversity.org)

- There have been numerous theories of gravitation since ancient times. (wikipedia.org)
- Our interests are also focused on the scalar-tensor theories of gravitation and their cosmologies. (uclouvain.be)

- I do not doubt that the gravitational wave detections are real. (blogspot.com)
- How uncertain are LIGO's first gravitational wave detections? (scienceblogs.com)
- In addition to more gravitational waves from colliding black hole binaries, merging double neutron stars are next on the list of most anticipated future detections. (mpg.de)

- Various simulations are currently being carried out to prove that the mission is able to meet the following scientific objectives - a better understanding of the gravitational field of Mercury and its state of rotation, a test of general relativity and the improvement of the planetary ephemeris. (unipi.it)
- His dissertation focused on the interface of numerical-relativity simulations and data analysis in gravitational-wave research. (mpg.de)
- Methods: Numerical simulations are used to plot an EM field with OAM emitted by a set of dipolar currents together with the soft photon field they induce. (mdpi.com)

- At face value, this argument seems to suggest that EM interactions reduce as opposed to increase gravitational fields, but I would be happy to get corrected on this. (physicsforums.com)
- In this model, learners move charges around a simulated electric field to determine how certain variables affect interactions among charged bodies. (compadre.org)
- Bhattacharya will test interactions between light and matter at the nanoscale and analyze measurements of weak electromagnetic fields and gravitational forces. (rit.edu)
- Your mere CLAIM that the ratios must change, during gravitational interactions, has no supporting evidence, simply because the amounts of mass that convert to energy are far too tiny to measure. (thenakedscientists.com)
- Since dark matter does not interact (electromagnetically) with photons, it had time to form tiny potential wells through gravitational interactions before recombination. (aip.de)
- The slightly strange shape maybe due to gravitational interactions with its neighbours. (nickcook.net)
- It also also had 4 supernovae which is relatively high and may be attributed to gravitation interactions with its neighbours. (nickcook.net)

- It has solutions leading to $repulsive$ gravitational behavior. (vixra.org)
- And it does not have enough matter to justify the gravitational behavior of galaxies, and expansion rates. (energeticforum.com)

- A spacecraft moves protons of a macroscopic ensemble of hydrogen atoms with constant velocity in the Earth's gravitational field. (hindawi.com)
- Protons of all atoms are dragged by a spacecraft with constant velocity in the Earth's gravitational field. (hindawi.com)

- The first three tests, proposed by Albert Einstein in 1915, concerned the "anomalous" precession of the perihelion of Mercury , the bending of light in gravitational fields , and the gravitational redshift . (wikipedia.org)
- The crucial breakthrough had been that Einstein had recognized that the gravitational field - or, as we would now say, the inertio-gravitational field - should not be described by a variable speed of light as he had attempted in 1912, but by the so-called metric tensor field. (narkive.com)

- D. E. Afanasev, M. O. Katanaev, "Global properties of warped solutions in general relativity with an electromagnetic field and a cosmological constant", Phys. (mathnet.ru)

- Not only is the mass potential a scalar EM potential, it is also a gravitational potential. (weebly.com)
- This energy resides as pure potential in the scalar fields of the vacuum fluctuation as scalar EM potential waves. (weebly.com)
- Two specific solutions to the novel Relativistic Bohm-Poisson equation (associated to a real scalar field) are provided encoding the repulsive nature of dark energy. (vixra.org)

- Because it is scattered by the zero-point oscillations of the quantized fields, light of frequency omega travelling normally to two parallel mirrors experiences the vacuum between them as a dispersive medium with refractive index n(omega). (vu.nl)

- New conservation laws of gravitation and electromagnetism , appear to generate different QG vacua, preserving more information in soft photon/graviton hair implants. (mdpi.com)

- Both in the weak field limit (as in the Solar System) and with the stronger fields present in systems of binary pulsars the predictions of general relativity have been extremely well tested. (wikipedia.org)

- The gravitational model of strong interaction is the model, in which strong interaction is described by strong gravitation , the action of the gravitational torsion field and electromagnetic forces. (wikiversity.org)
- This quantity now determines the gravitational torsion field and is often referred to simply torsion, and in gravitoelectromagnetism , if we consider it a part of general relativity in the limit of small field is gravitomagnetic field strength. (wikiversity.org)
- Heaviside also introduced the vector of energy flux density of gravitational field and defined the two components that make up the total energy density of gravitational field, and then comes to the expression for curl of gravitational field strength, connecting it with the speed of change of torsion field. (wikiversity.org)

- Richard O'Shaughnessy, RIT assistant professor, adds that, 'with Virgo, we can now reliably point to where a gravitational wave signal came from. (scienmag.com)
- Together with the Italian scientist Adalberto Giazotto, he devoted himself to the design and development of the Virgo gravitational wave detector, now installed at Cascina, near Pisa (Italy). (cnrs.fr)
- While taking part in designing Virgo, he developed innovative solutions in the field of lasers and optics, while his colleague Adalberto Giazotto worked on suspension systems that enabled mirrors to be decoupled from terrestrial vibrations. (cnrs.fr)

- The initial fluctuations in the density of the released photons combined with gravitational redshift and Doppler effects get imprinted as fluctuations in the cosmic microwave background with a characteristic amplitude of one part in 100,000. (aip.de)

- Consider an observer in a lift in free-fall in a uniform gravitational field and an observer at rest in the uniform gravitational field. (physicsforums.com)
- Thus light 'bends' in the presence of a uniform gravitational field. (physicsforums.com)

- Gravitational forces, in turn, seek to restore the balance between positive and negative potential energies, that is, between the forces of attraction and repulsion created by different fields. (thunderbolts.info)
- Thus, the repulsive forces of the Pauli prohibition are directly proportional to the rest mass, and there is no contradiction in the assertion that they can generate counteracting gravitational forces. (thunderbolts.info)
- Use mathematical representations of Newton's Law of Gravitation and Coulomb's Law to describe and predict the gravitational and electrostatic forces between objects. (compadre.org)
- In the case of interest here, besides the standard gravitational potential force, there exist other, spin-dependent, forces yielding modifications to the more familiar virial result valid in the central field of a non-rotating body. (springer.com)
- in Quantum Fields and Fundamental Forces from Imperial College London. (ucd.ie)
- Modular Generator of Gravitational Forces - A fundamentally new type of mechanical gyroscope that needs urgent prototyping. (isan.com.ua)

- Due to nonhomogeneous squeezing of space by the field, electron ground state wave function experiences time-dependent perturbation in each hydrogen atom. (hindawi.com)
- Gravitational Wave International Committee. (perimeterinstitute.ca)
- Gravitational Wave Signatures of Highly Compact Boson Star Binaries. (perimeterinstitute.ca)
- Gravitational-Wave Data Analysis. (springer.com)
- I think that the gravitational wave community is doing a crappy job justifying the expenses for their research. (blogspot.com)
- candidates with a background in gravitational wave research are particularly encouraged to apply. (uni-frankfurt.de)
- a main target for LISA, the future space-based gravitational wave detector to be launched by ESA. (ucd.ie)
- When the New York Manufacturing highlighted compared, there maintained suicide from the Gravitational-wave time ED about the communication that would show confronted to capitalise the many markets( 44). (claudiabrefeld.de)
- I am also interested in gravitational-wave data analysis. (mpg.de)

- To electrify this discussion a bit, EU-ers would likely assert that the electric field is fundamental and universal. (thunderbolts.info)
- In one of his fundamental works Maxwell in 1865 suggested that gravitation could be traceable to the action of a surrounding medium. (wikiversity.org)

- Resonant interaction of a graviton and a gravitational field of a double star are investigated. (scirp.org)
- In QCD gluons are considered the carriers of strong interaction, and the interaction between nucleons is treated as a residual effect of the quark gluon fields that goes beyond hadrons. (wikiversity.org)
- This interaction leads to attraction of bodies and to the concept of gravitational mass. (wikiversity.org)
- In classical general relativity there are problems describing the spin-orbit interaction, the uniqueness of some results and their consistency, impossibility of constructing a quantum field model in a canonical way. (wikiversity.org)