|
Pantur Silaban
Pantur Silaban (11 November 1937 – 1 August 2022) was an Indonesian physicist, regarded as one of the foremost in his profession in Indonesia, especially in the field of theoretical physics. He was also one of the earliest physicists from ASEAN countries who studied Einstein's general relativity theories in depth. Early life Pantur Silaban was born in Sumatra to Israel Silaban and Regina Lumbantoruan in Dairi regency in Sumatra, Indonesia. He finished his bachelor's degree in physics from Bandung Institute of Technology, Indonesia in 1964. Career In 1967, Silaban went to United States to study General Relativity theory at ''Central Studies of Gravitation'' at Syracuse University under direction of Peter Bergmann and Joshua N. Goldberg who were among the authoritative experts in general relativity after Albert Einstein. Here, Silaban went furthermore to study one of the hottest topics in physics at the time which tried to unify quantum field and general relativity to find ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidikalang
Sidikalang is a town in North Sumatra province of Indonesia and it is the seat (capital) of Dairi Regency Dairi Regency is a regency on the west shore of Lake Toba in North Sumatra, Indonesia. The regency covers an area of square kilometres and it had a population of 269,848 people at the 2010 Census and 308,764 at the 2020 Census.Badan Pusat Statis .... * Climate Notable people * Bonar Sianturi (1944–2022), former Regent of Sintang (1989–1994) References Populated places in North Sumatra Regency seats of North Sumatra {{NSumatra-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Relativity
General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time or four-dimensional spacetime. In particular, the ' is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of second order partial differential equations. Newton's law of universal gravitation, which describes classical gravity, can be seen as a prediction of general relativity for the almost flat spacetime geometry around stationary mass distributions. Some predictions of general relativity, however, are beyond Newton's law of universal gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People Of Batak Descent
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2022 Deaths
The following notable deaths occurred in 2022. Names are reported under the date of death, in alphabetical order. A typical entry reports information in the following sequence: * Name, age, country of citizenship at birth, subsequent nationality (if applicable), what subject was noted for, cause of death (if known), and reference. December 25 * Chalapathi Rao, 78, Indian actor and producer, heart attack. (death announced on this date) 24 *Vittorio Adorni, 85, Italian road racing cyclist. * Cotton Davidson, 91, American football player ( Baltimore Colts, Dallas Texans, Oakland Raiders). (death announced on this date) *Franco Frattini, 65, Italian politician and magistrate, twice minister of foreign affairs, twice of public administration, European commissioner for justice (2004–2008), cancer. * Madosini, 78, South African musician. * Barry Round, 72, Australian footballer (Sydney, Footscray, Williamstown), organ failure. * Royal Applause, 29, British Thoroughbred raceh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1937 Births
Events January * January 1 – Anastasio Somoza García becomes President of Nicaragua. * January 5 – Water levels begin to rise in the Ohio River in the United States, leading to the Ohio River flood of 1937, which continues into February, leaving 1 million people homeless and 385 people dead. * January 15 – Spanish Civil War: Second Battle of the Corunna Road ends inconclusively. * January 20 – Second inauguration of Franklin D. Roosevelt: Franklin D. Roosevelt is sworn in for a second term as President of the United States. This is the first time that the United States presidential inauguration occurs on this date; the change is due to the ratification in 1933 of the Twentieth Amendment to the United States Constitution. * January 23 – Moscow Trials: Trial of the Anti-Soviet Trotskyist Center – In the Soviet Union 17 leading Communists go on trial, accused of participating in a plot led by Leon Trotsky to overthrow Joseph Stalin's regime, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institut Teknologi Bandung
The Bandung Institute of Technology ( id, Institut Teknologi Bandung, abbreviated as ITB) is a national research university located in Bandung, Indonesia. Since its establishment in 1920, ITB has been consistently recognized as Indonesia's premier STEM-based academic institution and reserves its place among the country's top elite universities. It has produced many notable leaders in science, engineering, politics, business, academia, and culture. ITB is ranked 235th internationally according to QS World University Rankings, and ranked 67th in QS Asian University Rankings. Domestically, the university is ranked 2nd by QS World University Rankings and ranked 3rd by Times Higher Education. ITB has the highest score threshold in Indonesia's national state university entrance test in science and technology. To this day, its engineering faculties are known to be the toughest to be admitted into. History Bandung Institute of Technology traces its origin to the Technische Hoogesch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Professor (highest Academic Rank)
Professor (commonly abbreviated as Prof.) is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who professes". Professors are usually experts in their field and teachers of the highest rank. In most systems of academic ranks, "professor" as an unqualified title refers only to the most senior academic position, sometimes informally known as "full professor". In some countries and institutions, the word "professor" is also used in titles of lower ranks such as associate professor and assistant professor; this is particularly the case in the United States, where the unqualified word is also used colloquially to refer to associate and assistant professors as well. This usage would be considered incorrect among other academic communities. However, the otherwise unqualified title "Professor" designated with a capital letter nearly always refers to a full professor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Particle Physics
Particle physics or high energy physics is the study of fundamental particles and forces that constitute matter and radiation. The fundamental particles in the universe are classified in the Standard Model as fermions (matter particles) and bosons (force-carrying particles). There are three generations of fermions, but ordinary matter is made only from the first fermion generation. The first generation consists of up and down quarks which form protons and neutrons, and electrons and electron neutrinos. The three fundamental interactions known to be mediated by bosons are electromagnetism, the weak interaction, and the strong interaction. Quarks cannot exist on their own but form hadrons. Hadrons that contain an odd number of quarks are called baryons and those that contain an even number are called mesons. Two baryons, the proton and the neutron, make up most of the mass of ordinary matter. Mesons are unstable and the longest-lived last for only a few hundre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Society On General Relativity And Gravitation
The International Society on General Relativity and Gravitation (ISGRG) is a learned society established in 1971 with the goal to promote research on general relativity (GR) and gravitation. To that end, it encourages communication between relativity researchers, in particular by organizing the triennial international GR conferences, sponsoring the Hyperspace website, and publishing the journal ''General Relativity and Gravitation''. The society also serves as the Affiliated Commission 2 (AC.2) of the International Union of Pure and Applied Physics. The society's president is always a prominent gravitational physicist. In the past, the office has been held by Christian Møller (1971–74), Nathan Rosen (1974–77), Peter Bergmann (1977–80), Yvonne Choquet-Bruhat (1980–83), Dennis Sciama (1983–86), Ezra Ted Newman (1986–89), George Ellis (1989–92), Roger Penrose (1992–95), Jürgen Ehlers (1995–98), Werner Israel (1998–2001), Robert Wald (2001–04), Clifford Will (20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Relativity And Gravitation
A general officer is an officer of high rank in the armies, and in some nations' air forces, space forces, and marines or naval infantry. In some usages the term "general officer" refers to a rank above colonel."general, adj. and n.". OED Online. March 2021. Oxford University Press. https://www.oed.com/view/Entry/77489?rskey=dCKrg4&result=1 (accessed May 11, 2021) The term ''general'' is used in two ways: as the generic title for all grades of general officer and as a specific rank. It originates in the 16th century, as a shortening of ''captain general'', which rank was taken from Middle French ''capitaine général''. The adjective ''general'' had been affixed to officer designations since the late medieval period to indicate relative superiority or an extended jurisdiction. Today, the title of ''general'' is known in some countries as a four-star rank. However, different countries use different systems of stars or other insignia for senior ranks. It has a NATO rank sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roger Penrose
Sir Roger Penrose (born 8 August 1931) is an English mathematician, mathematical physicist, philosopher of science and Nobel Laureate in Physics. He is Emeritus Rouse Ball Professor of Mathematics in the University of Oxford, an emeritus fellow of Wadham College, Oxford, and an honorary fellow of St John's College, Cambridge and University College London. Penrose has contributed to the mathematical physics of general relativity and cosmology. He has received several prizes and awards, including the 1988 Wolf Prize in Physics, which he shared with Stephen Hawking for the Penrose–Hawking singularity theorems, and one half of the 2020 Nobel Prize in Physics "for the discovery that black hole formation is a robust prediction of the general theory of relativity". He is regarded as one of the greatest living physicists, mathematicians and scientists, and is particularly noted for the breadth and depth of his work in both natural and formal sciences. Early life and educati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Bang
The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form. These models offer a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. The overall uniformity of the Universe, known as the flatness problem, is explained through cosmic inflation: a sudden and very rapid expansion of space during the earliest moments. However, physics currently lacks a widely accepted theory of quantum gravity that can successfully model the earliest conditions of the Big Bang. Crucially, these models are compatible with the Hubble–Lemaître law—the observation that the farther away a galaxy is, the faster it is m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_1938.jpg "Click for more on -> People Of Batak Descent")
.svg "Click for more on -> Roger Penrose")
