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Paul Steinhardt
Paul Joseph Steinhardt (born December 25, 1952) is an American theoretical physicist whose principal research is in cosmology and condensed matter physics. He is currently the Albert Einstein Professorship in Science, Albert Einstein Professor in Science at Princeton University, where he is on the faculty of both the Departments of Physics and of Astrophysical Sciences. Steinhardt is best known for his development of new theories of the origin, evolution and future of the universe. He is also well known for his exploration of a new form of matter, known as quasicrystals, which were thought to exist only as man-made materials until he co-discovered the first known natural quasicrystal in a museum sample. He subsequently led a separate team that followed up that discovery with several more examples of natural quasicrystals recovered from the wilds of the Kamchatka Peninsula in far eastern Russia. Several years later, he and collaborators reported the accidental synthesis of a previo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmic Inflation
In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the very early universe. Following the inflationary period, the universe continued to expand, but at a slower rate. The re-acceleration of this slowing expansion due to dark energy began after the universe was already over 7.7 billion years old (5.4 billion years ago). Inflation theory was developed in the late 1970s and early 1980s, with notable contributions by several theoretical physicists, including Alexei Starobinsky at Landau Institute for Theoretical Physics, Alan Guth at Cornell University, and Andrei Linde at Lebedev Physical Institute. Starobinsky, Guth, and Linde won the 2014 Kavli Prize "for pioneering the theory of cosmic inflation". It was developed further in the early 1980s. It explains the origin of the large-scale structure of the cosmos. Quantum fluctuations in the microscopic inflationary region, magnified t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radcliffe Fellow
The Radcliffe Institute for Advanced Study at Harvard University, also known as the Harvard Radcliffe Institute, is an institute of Harvard University that fosters interdisciplinary research across the humanities, sciences, social sciences, arts, and professions. It came into being in 1999 as the successor institution to the former Radcliffe College, originally a women's college connected with Harvard. The institute comprises three programs: * The Radcliffe Institute Fellowship Program is a highly selective fellowship that supports the work of 50 artists and scholars each year. * The Academic Ventures program is for collaborative research projects and hosts lectures and conferences. * The Arthur and Elizabeth Schlesinger Library on the History of Women in America documents the lives of American women of the past and present for the future. The Radcliffe Institute often hosts public events, many of which can be watched online. It is a member of the Some Institutes for Advanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simons Fellow
The Simons Foundation is an American private foundation established in 1994 by Marilyn and Jim Simons with offices in New York City. As one of the largest charitable organizations in the United States with assets of over $5 billion in 2022, the foundation's mission is to advance the frontiers of research in mathematics and basic sciences. The foundation supports science by making grants to individual researchers and their projects. In 2021, Marilyn Simons stepped down as president after 26 years at the helm, and astrophysicist David Spergel was appointed president. The Flatiron Institute In 2016, the foundation launched the Flatiron Institute, its in-house multidisciplinary research institute focused on computational science. The Flatiron Institute hosts centers for computational science in five areas: Funding areas The foundation makes grants in four program areas: Simons Investigators awardees Among other programs, the Simons Foundation funds the Simons Investigators ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Scott Award
John Scott Award, created in 1816 as the John Scott Legacy Medal and Premium, is presented to men and women whose inventions improved the "comfort, welfare, and happiness of human kind" in a significant way. "...the John Scott Medal Fund, established in 1816...". Since 1919 the Board of Directors of City Trusts of Philadelphia provide this award, recommended by an advisory committee. Eugene Garfield is member of the Advisory Committee. In 1822 the first awards were given to thirteen people by the Philadelphia Society for Promoting Agriculture entrusted by the " Corporation of the city of Philadelphia". The druggist John Scott of Edinburgh organized a $4,000 fund which, after his death in 1815 was administered by a merchant until the first award, a copper medal and "an amount not to exceed twenty dollars", was given in 1822. (At the time, $20 could buy one ox or a 12-volume encyclopedia.) Several hundred recipients have since been selected by the City Council of Philadelphia, which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oliver E
Oliver may refer to: Arts, entertainment and literature Books * ''Oliver the Western Engine'', volume 24 in ''The Railway Series'' by Rev. W. Awdry * ''Oliver Twist'', a novel by Charles Dickens Fictional characters * Ariadne Oliver, in the novels of Agatha Christie * Oliver (Disney character) * Oliver Fish, a gay police officer on the American soap opera ''One Life to Live'' * Oliver Hampton, in the American television series ''How to Get Away with Murder'' * Oliver Jones (''The Bold and the Beautiful''), on the American soap opera ''The Bold and the Beautiful'' * Oliver Lightload, in the movie ''Cars'' * Oliver Oken, from ''Hannah Montana'' * Oliver (paladin), a paladin featured in the Matter of France * Oliver Queen, DC Comic book hero also known as the Green Arrow * Oliver (Thomas and Friends character), a locomotive in the Thomas and Friends franchise * Oliver Trask, a controversial minor character from the first season of ''The O.C.'' * Oliver Twist ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirac Medal (ICTP)
The Dirac Medal of the ICTP is given each year by the International Centre for Theoretical Physics (ICTP) in honour of physicist Paul Dirac. The award, announced each year on 8 August (Dirac's birthday), was first awarded in 1985. An international committee of distinguished scientists selects the winners from a list of nominated candidates. The Committee invites nominations from scientists working in the fields of theoretical physics or mathematics. The Dirac Medal of the ICTP is not awarded to Nobel Laureates, Fields Medalists, or Wolf Prize winners. However, several Dirac Medallists have subsequently won one of these awards. The medallists receive a prize of US$5,000. Recipients See also * List of physics awards * List of awards named after people This is a list of awards that are named after people. A B C D E F G H I J K L M N O P R S T U–V W Y Z See also *Lists of awards *List of eponyms *List of awards na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guggenheim Fellowship
Guggenheim Fellowships are Grant (money), grants that have been awarded annually since by the John Simon Guggenheim Memorial Foundation, endowed by the late Simon Guggenheim, Simon and Olga Hirsh Guggenheim. These awards are bestowed upon individuals who have demonstrated distinguished accomplishment in the past and potential for future achievement. The recipients exhibit outstanding aptitude for prolific scholarship or exceptional talent in the arts. The foundation holds two separate competitions each year: * One open to citizens and permanent residents of the United States and Canada. * The other to citizens and permanent residents of Latin America and the Caribbean. The Latin America and Caribbean competition is currently suspended "while we examine the workings and efficacy of the program. The U.S. and Canadian competition is unaffected by this suspension." The performing arts are excluded from these fellowships, but composers, film directors, and choreographers are still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Icosahedrite
Icosahedrite is the first known naturally occurring quasicrystal Phase (matter), phase. It has the composition Al63Cu24Fe13 and is a mineral approved by the International Mineralogical Association in 2010. Its discovery followed a 10-year-long systematic search by an international team of scientists led by Luca Bindi and Paul J. Steinhardt to find the first natural quasicrystal. It occurs as tiny grains in a small sample labelled "khatyrkite" (catalog number 46407/G, housed in The Museum of Natural History, University of Florence, Italy), collected from an outcrop of weathered serpentinite in the Khatyrka (river), Khatyrka Ultramafic rock, ultramafic zone of the Koryak-Kamchatka area, Koryak Mountains, Russia. The rock sample also contains spinel, diopside, forsterite, nepheline, sodalite, corundum, stishovite, khatyrkite, cupalite and an unnamed AlCuFe alloy. Evidence shows that the sample is actually extraterrestrial in origin, delivered to the Earth by a CV3 carbonaceous chondr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quasicrystal
A quasiperiodicity, quasiperiodic crystal, or quasicrystal, is a structure that is Order and disorder (physics), ordered but not Bravais lattice, periodic. A quasicrystalline pattern can continuously fill all available space, but it lacks translational symmetry. While crystals, according to the classical crystallographic restriction theorem, can possess only two-, three-, four-, and six-fold rotational symmetries, the Bragg diffraction pattern of quasicrystals shows sharp peaks with other symmetry orders—for instance, five-fold. Aperiodic tilings were discovered by mathematicians in the early 1960s, and some twenty years later, they were found to apply to the study of natural quasicrystals. The discovery of these aperiodic forms in nature has produced a paradigm shift in the field of crystallography. In crystallography, the quasicrystals were predicted in 1981 by a five-fold symmetry study of Alan Lindsay Mackay,—that also brought in 1982, with the crystallographic Fourier t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-interacting Dark Matter
In astrophysics and particle physics, self-interacting dark matter (SIDM) is an alternative class of dark matter particles which have strong interactions, in contrast to the standard cold dark matter model (CDM). SIDM was postulated in 2000 as a solution to the core-cusp problem. In the simplest models of DM self-interactions, a Yukawa-type potential and a force carrier φ mediates between two dark matter particles. On galactic scales, DM self-interaction leads to energy and momentum exchange between DM particles. Over cosmological time scales this results in isothermal cores in the central region of dark matter haloes. If the self-interacting dark matter is in hydrostatic equilibrium, its pressure and density follow: :\nabla P_\chi/\rho_\chi = \nabla \Phi_ = \nabla (\Phi_\chi + \Phi_b) where \Phi_ and \Phi_ are the gravitational potential of the dark matter and a baryon respectively. The equation naturally correlates the dark matter distribution to that of the baryonic matter dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quintessence (physics)
In physics, quintessence is a hypothetical form of dark energy, more precisely a scalar field minimally coupled to gravity, postulated as an explanation of the observation of an accelerating rate of expansion of the universe. The first example of this scenario was proposed by Ratra and Peebles (1988) and Wetterich (1988). The concept was expanded to more general types of time-varying dark energy, and the term "quintessence" was first introduced in a 1998 paper by Robert R. Caldwell, Rahul Dave and Paul Steinhardt. It has been proposed by some physicists to be a fifth fundamental force. Quintessence differs from the cosmological constant explanation of dark energy in that it is dynamic; that is, it changes over time, unlike the cosmological constant which, by definition, does not change. Quintessence can be either attractive or repulsive depending on the ratio of its kinetic and potential energy. Those working with this postulate believe that quintessence became repulsive abou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
