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Benjamin W. Lee
Benjamin Whisoh Lee (; January 1, 1935 – June 16, 1977), or Ben Lee, was a Korean-born American theoretical physicist. His work in theoretical particle physics exerted great influence on the development of the standard model in the late 20th century, especially on the renormalization of the electro-weak model and gauge theory. He predicted the mass of the charm quark The charm quark, charmed quark or c quark (from its symbol, c) is the third-most massive of all quarks, a type of elementary particle. Charm quarks are found in hadrons, which are subatomic particles made of quarks. Examples of hadrons containin ... and contributed to its search. Since his inception as a physicist, he has published 110 papers for about 20 years, of which 77 papers have been published in the journal. There are 69 papers cited more than 10 times and eight papers cited more than 500 times. As of October 2013, all of his papers are cited more than 13,400 times. As a major disciple, Kang Joo-sang, p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keijō
Keijō, or Gyeongseong, was an administrative district of Chōsen that corresponds to the present Seoul, the capital of South Korea. :ko:경성부, -(Seoul of Korea under Japanese rule) Honmachi The central district of Gyeongseong was Honmachi, present-day Chungmu-ro. See also * History of Seoul * Names of Seoul Seoul has been known in the past by successive names, including Wiryeseong () and Hanseong (Baekje era), Bukhansangun (Goguryo era), Hanyang (North and South states period), Namgyeong (, Goryeo era), Hanyangbu (Goryeo under Mongol rule), Hanseong ... References Korea under Japanese rule Former prefectures of Japan in Korea {{Japan-hist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gauge Theory
In physics, a gauge theory is a type of field theory in which the Lagrangian (and hence the dynamics of the system itself) does not change (is invariant) under local transformations according to certain smooth families of operations (Lie groups). The term ''gauge'' refers to any specific mathematical formalism to regulate redundant degrees of freedom in the Lagrangian of a physical system. The transformations between possible gauges, called ''gauge transformations'', form a Lie group—referred to as the ''symmetry group'' or the ''gauge group'' of the theory. Associated with any Lie group is the Lie algebra of group generators. For each group generator there necessarily arises a corresponding field (usually a vector field) called the ''gauge field''. Gauge fields are included in the Lagrangian to ensure its invariance under the local group transformations (called ''gauge invariance''). When such a theory is quantized, the quanta of the gauge fields are called '' gauge bosons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Rose Of Sharon Blooms Again
''The Rose of Sharon Blooms Again'' ( ko, 무궁화 꽃이 피었습니다) was a popular South Korean novel by Kim Jin-myung (김진명) written in 1993, and No.1 bestseller for several weeks in 1994 which extolls pan-Korean nationalism. Plot The story was set in the present and revolved around a South Korean scientist who secretly helps North Korea develop nuclear weapons which are then used to ward off Japanese aggression. Novel Kim Jin - myung 's novel, "The Rose of Sharon Blooms Again" in 1993, appeared a physicist who was killed by a duke of a powerful country in developing a nuclear weapon for the Republic of Korea. He writes that a novel physicist is a model of " Lee Hwiso" and that the story of the word is based on the Kong seokha's novel "Nuclear Physicist Words". This book sold more than three million copies and became a bestseller. Film The film version opened on 20 May 1995. Director was Jung Jin-woo (정진우) and the actors included Jeong Bo-seok (정보석), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charm Quark
The charm quark, charmed quark or c quark (from its symbol, c) is the third-most massive of all quarks, a type of elementary particle. Charm quarks are found in hadrons, which are subatomic particles made of quarks. Examples of hadrons containing charm quarks include the J/ψ meson (), D mesons (), charmed Sigma baryons (), and other charmed particles. It, along with the strange quark, is part of the second generation of matter, and has an electric charge of + ''e'' and a bare mass of . Like all quarks, the charm quark is an elementary fermion with spin , and experiences all four fundamental interactions: gravitation, electromagnetism, weak interactions, and strong interactions. The antiparticle of the charm quark is the charm antiquark (sometimes called ''anticharm quark'' or simply ''anticharm''), which differs from it only in that some of its properties have equal magnitude but opposite sign. The existence of a fourth quark had been speculated by a number of autho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gauge Theory
In physics, a gauge theory is a type of field theory in which the Lagrangian (and hence the dynamics of the system itself) does not change (is invariant) under local transformations according to certain smooth families of operations (Lie groups). The term ''gauge'' refers to any specific mathematical formalism to regulate redundant degrees of freedom in the Lagrangian of a physical system. The transformations between possible gauges, called ''gauge transformations'', form a Lie group—referred to as the ''symmetry group'' or the ''gauge group'' of the theory. Associated with any Lie group is the Lie algebra of group generators. For each group generator there necessarily arises a corresponding field (usually a vector field) called the ''gauge field''. Gauge fields are included in the Lagrangian to ensure its invariance under the local group transformations (called ''gauge invariance''). When such a theory is quantized, the quanta of the gauge fields are called '' gauge bosons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electro-weak
In particle physics, the electroweak interaction or electroweak force is the unified description of two of the four known fundamental interactions of nature: electromagnetism and the weak interaction. Although these two forces appear very different at everyday low energies, the theory models them as two different aspects of the same force. Above the unification energy, on the order of 246 GeV,The particular number 246 GeV is taken to be the vacuum expectation value v = (G_\text \sqrt)^ of the Higgs field (where G_\text is the Fermi coupling constant). they would merge into a single force. Thus, if the temperature is high enough – approximately 1015 K – then the electromagnetic force and weak force merge into a combined electroweak force. During the quark epoch (shortly after the Big Bang), the electroweak force split into the electromagnetic and weak force. It is thought that the required temperature of 1015 K has not been seen widely throughout the unive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renormalization
Renormalization is a collection of techniques in quantum field theory, the statistical mechanics of fields, and the theory of self-similar geometric structures, that are used to treat infinities arising in calculated quantities by altering values of these quantities to compensate for effects of their self-interactions. But even if no infinities arose in loop diagrams in quantum field theory, it could be shown that it would be necessary to renormalize the mass and fields appearing in the original Lagrangian. For example, an electron theory may begin by postulating an electron with an initial mass and charge. In quantum field theory a cloud of virtual particles, such as photons, positrons, and others surrounds and interacts with the initial electron. Accounting for the interactions of the surrounding particles (e.g. collisions at different energies) shows that the electron-system behaves as if it had a different mass and charge than initially postulated. Renormalization, in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Model
The Standard Model of particle physics is the theory describing three of the four known fundamental forces (electromagnetism, electromagnetic, weak interaction, weak and strong interactions - excluding gravity) in the universe and classifying all known elementary particles. It was developed in stages throughout the latter half of the 20th century, through the work of many scientists worldwide, with the current formulation being finalized in the mid-1970s upon experimental confirmation of the existence of quarks. Since then, proof of the top quark (1995), the tau neutrino (2000), and the Higgs boson (2012) have added further credence to the Standard Model. In addition, the Standard Model has predicted various properties of weak neutral currents and the W and Z bosons with great accuracy. Although the Standard Model is believed to be theoretically self-consistent and has demonstrated huge successes in providing experimental predictions, it leaves some physics beyond the standard m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theoretical Physicist
Theoretical physics is a branch of physics that employs mathematical models and abstractions of physical objects and systems to rationalize, explain and predict natural phenomena. This is in contrast to experimental physics, which uses experimental tools to probe these phenomena. The advancement of science generally depends on the interplay between experimental studies and theory. In some cases, theoretical physics adheres to standards of mathematical rigour while giving little weight to experiments and observations.There is some debate as to whether or not theoretical physics uses mathematics to build intuition and illustrativeness to extract physical insight (especially when normal experience fails), rather than as a tool in formalizing theories. This links to the question of it using mathematics in a less formally rigorous, and more intuitive or heuristic way than, say, mathematical physics. For example, while developing special relativity, Albert Einstein was concerned with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korea Under Japanese Rule
Between 1910 and 1945, Korea was ruled as a part of the Empire of Japan. Joseon Korea had come into the Japanese sphere of influence with the Japan–Korea Treaty of 1876; a complex coalition of the Meiji government, military, and business officials began a process of integrating Korea's politics and economy with Japan. The Korean Empire, proclaimed in 1897, became a protectorate of Japan with the Japan–Korea Treaty of 1905; thereafter Japan ruled the country indirectly through the Japanese Resident-General of Korea. Japan formally annexed the Korean Empire with the Japan–Korea Treaty of 1910, without the consent of the former Korean Emperor Gojong, the regent of the Emperor Sunjong. Upon its annexation, Japan declared that Korea would henceforth be officially named Chōsen. This name was recognized internationally until the end of Japanese colonial rule. The territory was administered by the Governor-General of Chōsen based in Keijō (Seoul). Japanese rule prioritized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korean Name
A Korean name (Hangul: ; Hanja: ) consists of a family name followed by a given name, as used by the Korean people in both South Korea and North Korea. In the Korean language, ''ireum'' or ''seongmyeong'' usually refers to the family name (''seong'') and given name (''ireum'' in a narrow sense) together. Korean names are descended from Chinese names as part of Sino-Korean vocabulary. Traditional Korean family names typically consist of only one syllable. There is no middle name in the English language sense. Many Koreans have their given names made of a generational name syllable and an individually distinct syllable, though this practice is rarely seen nowadays. The generational name syllable is shared by siblings in North Korea, and by all members of the same generation of an extended family in South Korea. Married men and women keep their full personal names, and children inherit the father's family name unless otherwise settled when registering the marriage. The family nam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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