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1981 In Science
The year 1981 in science and technology involved many significant events, listed below. Biology * September – Pantanal Matogrossense National Park designated in Brazil. * Publication of Stephen Jay Gould's critique of biological determinism, ''The Mismeasure of Man'', in the United States. Chemistry * A German research team led by Peter Armbruster and Gottfried Münzenberg at the GSI Helmholtz Centre for Heavy Ion Research (GSI Helmholtzzentrum für Schwerionenforschung) in Darmstadt bombard a target of bismuth-209 with accelerated nuclei of chromium-54 to produce 5 atoms of the isotope bohrium-262 Computer science * March 5 – The ZX81, a pioneering British home computer, is launched by Sinclair Research, going on to sell over 1.5 million units worldwide. * April 3 – The Osborne 1, the first successful portable computer, is unveiled at the West Coast Computer Faire in San Francisco. * July 9 – Nintendo releases the arcade game ''Donkey Kong'' featuring the debut of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Coast Computer Faire
The West Coast Computer Faire was an annual computer industry conference and exposition most often associated with San Francisco, its first and most frequent venue. The first fair was held in 1977 and was organized by Jim Warren (computer specialist), Jim Warren and Bob Reiling. At the time, it was the biggest computer show in the world, intended to popularize the personal computer in the home. The West Coast PC Faire was formed to provide a more specialized show. However, Apple Inc. stopped exhibiting at the West Coast Computer Faire, refusing to exhibit at any show other than COMDEX that also had PC-based exhibits. In 1983, Warren sold the rights to the Faire for US$3 million to Prentice Hall, who later sold it to Sheldon Adelson, the owner of Interface Group and COMDEX. In total, sixteen shows were held, with the last in 1991. After Warren sold the show, it had a few more good years, and then declined rapidly. History The first fair took place on April 15–17, 1977, in San F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fetal Surgery
Fetal surgery, also known as antenatal surgery or prenatal surgery, is a growing branch of maternal-fetal medicine that covers any of a broad range of surgical techniques that are used to treat congenital abnormalities in fetuses who are still in the pregnant uterus. There are three main types: open fetal surgery, which involves completely opening the uterus to operate on the fetus; minimally invasive fetoscopic surgery, which uses small incisions and is guided by fetoscopy and sonography; and percutaneous fetal therapy, which involves placing a catheter under continuous ultrasound guidance. Fetal intervention is relatively new. Advancing technologies allow earlier and more accurate diagnosis of diseases and congenital problems in a fetus. Fetal surgery draws principally from the fields of surgery, obstetrics and gynecology, and pediatrics- especially the sub-specialties of neonatology (care of newborns), maternal-fetal medicine (care of high-risk pregnancies), and pediatri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of California, San Francisco
The University of California, San Francisco (UCSF) is a Public university, public Land-grant university, land-grant research university in San Francisco, California, United States. It is part of the University of California system and is dedicated entirely to health science and life science. It conducts research and teaching in Medicine, medical and biology, biological sciences. UCSF was founded as Toland Medical College in 1864. In 1873, it became affiliated with the University of California as its Medical Department. In the same year, it incorporated the California College of Pharmacy and in 1881 it established a dentistry school. Its facilities were located in both Berkeley, California, Berkeley and San Francisco. In 1964, the school gained full administrative independence as a campus of the UC system, headed by its own chancellor, and in 1970 it gained its current name. Historically based at List of neighborhoods in San Francisco#Parnassus, Parnassus Heights with satellite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael R
Michael may refer to: People * Michael (given name), a given name * Michael (surname), including a list of people with the surname Michael Given name * Michael (bishop elect), English 13th-century Bishop of Hereford elect * Michael (Khoroshy) (1885–1977), cleric of the Ukrainian Orthodox Church of Canada * Michael Donnellan (fashion designer), Michael Donnellan (1915–1985), Irish-born London fashion designer, often referred to simply as "Michael" * Michael (footballer, born 1982), Brazilian footballer * Michael (footballer, born 1983), Brazilian footballer * Michael (footballer, born 1993), Brazilian footballer * Michael (footballer, born February 1996), Brazilian footballer * Michael (footballer, born March 1996), Brazilian footballer * Michael (footballer, born 1999), Brazilian footballer Rulers Byzantine emperors *Michael I Rangabe (d. 844), married the daughter of Emperor Nikephoros I *Michael II (770–829), called "the Stammerer" and "the Amorian" *Michael III ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norm Residue Isomorphism Theorem
In mathematics, the norm residue isomorphism theorem is a long-sought result relating Milnor ''K''-theory and Galois cohomology. The result has a relatively elementary formulation and at the same time represents the key juncture in the proofs of many seemingly unrelated theorems from abstract algebra, theory of quadratic forms, algebraic K-theory and the theory of motives. The theorem asserts that a certain statement holds true for any prime \ell and any natural number n. John MilnorMilnor (1970) speculated that this theorem might be true for \ell=2 and all n, and this question became known as Milnor's conjecture. The general case was conjectured by Spencer Bloch and Kazuya Kato and became known as the Bloch–Kato conjecture or the motivic Bloch–Kato conjecture to distinguish it from the Bloch–Kato conjecture on values of ''L''-functions.Bloch, Spencer and Kato, Kazuya, "L-functions and Tamagawa numbers of motives", The Grothendieck Festschrift, Vol. I, 333–400, Prog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Merkurjev
Aleksandr Sergeyevich Merkurjev (, born September 25, 1955) is a Russian-American mathematician, who has made major contributions to the field of algebra. Currently Merkurjev is a professor at the University of California, Los Angeles. Work Merkurjev's work focuses on algebraic groups, quadratic forms, Galois cohomology, algebraic K-theory and central simple algebras. In the early 1980s Merkurjev proved a fundamental result about the structure of central simple algebras of period dividing 2, which relates the 2-torsion of the Brauer group with Milnor K-theory. In subsequent work with Suslin this was extended to higher torsion as the Merkurjev–Suslin theorem. The full statement of the norm residue isomorphism theorem (also known as the Bloch-Kato conjecture) was proven by Voevodsky. In the late 1990s Merkurjev gave the most general approach to the notion of essential dimension, introduced by Buhler and Reichstein, and made fundamental contributions to that field. In part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wau Holland
Herwart Holland-Moritz, known as Wau Holland, (20 December 1951 – 29 July 2001) was a German computer security activist and journalist who in 1981 cofounded the Chaos Computer Club (CCC), one of the world's oldest hacking clubs. He founded the Wau Holland Foundation which continued after his death. Career From 1979 onwards, Holland supported the film historian Hans-Michael Bock with the development of the filmographic database CineGraph - a lexicon for German-language films, which appeared as a loose-leaf collection from 1984. In 1981, Holland co-founded the Chaos Computer Club (CCC). From 1983 he was a columnist for the Berlin-based ''Die Tageszeitung'', often reporting on the BBS scene and the computer underground. In the same year, he also supervised the phototypesetting of one of the early books created entirely on a computer (Osborne 1). Holland also co-founded the CCC's hacker magazine '' Datenschleuder'' in 1984, which praised the possibilities of global i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hacker (computer Security)
A security hacker or security researcher is someone who explores methods for breaching or bypassing defenses and exploiting weaknesses in a computer system or network. Hackers may be motivated by a multitude of reasons, such as profit, protest, sabotage, information gathering, challenge, recreation, or evaluation of a system weaknesses to assist in formulating defenses against potential hackers. Longstanding controversy surrounds the meaning of the term "hacker". In this controversy, computer programmers reclaim the term ''hacker'', arguing that it refers simply to someone with an advanced understanding of computers and computer networks, and that ''cracker'' is the more appropriate term for those who break into computers, whether computer criminals ( black hats) or computer security experts ( white hats). A 2014 article noted that "the black-hat meaning still prevails among the general public". The subculture that has evolved around hackers is often referred to as the "co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaos Computer Club
The Chaos Computer Club (CCC) is Europe's largest association of Hacker (computer security), hackers with 7,700 registered members. Founded in 1981, the association is incorporated as an ''eingetragener Verein'' in Germany, with local chapters (called ''Erfa-Kreise'') in various cities in Germany and the surrounding countries, particularly where there are German-speaking communities. Since 1985, some chapters in Switzerland have organized an independent sister association called the (CCC-CH) instead. The CCC describes itself as "a galactic community of life forms, independent of age, sex, race or societal orientation, which strives across borders for freedom of information…". In general, the CCC advocates more transparency in government, freedom of information, and the human rights, human right to communication. Supporting the principles of the hacker ethic, the club also fights for free universal access to computers and technological infrastructure as well as the use of open ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM Personal Computer
The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first microcomputer released in the IBM PC model line and the basis for the IBM PC compatible ''de facto'' standard. Released on August 12, 1981, it was created by a team of engineers and designers at International Business Machines (IBM), directed by William C. Lowe and Philip Don Estridge in Boca Raton, Florida. Powered by an x86-architecture Intel 8088 processor, the machine was based on open architecture and third-party peripherals. Over time, expansion cards and software technology increased to support it. The PC had a substantial influence on the personal computer market; the specifications of the IBM PC became one of the most popular computer design standards in the world. The only significant competition it faced from a non-compatible platform throughout the 1980s was from Apple's Macintosh product line, as well as consumer-grade platforms created by companies like Commodore and Atari. Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mario
Mario (; ) is a Character (arts), character created by the Japanese game designer Shigeru Miyamoto. He is the star of the ''Mario (franchise), Mario'' franchise, a recurring character in the ''Donkey Kong'' franchise, and the mascot of the Japanese video game company Nintendo. Mario is an Italian plumber who lives in the Mushroom Kingdom with his younger twin brother, Luigi. Their adventures generally involve rescuing Princess Peach from the villain Bowser while using power-ups that give them different abilities. Mario is distinguished by his large nose and mustache, overalls, red cap, and high-pitched, exaggerated Italian accent. Mario debuted as the player character of ''Donkey Kong (1981 video game), Donkey Kong'', a 1981 platform game. Miyamoto created Mario because Nintendo was unable to license Popeye as the protagonist. The graphical limitations of arcade cabinet, arcade hardware influenced Mario's design, such as his nose, mustache, and overalls, and he was named after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
