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Paolo Di Vecchia
Paolo Di Vecchia (born October 29, 1942 in Terracina) is an Italian theoretical physicist who works in the field of elementary particle physics, quantum field theory and string theory. Life Di Vecchia graduated from the University of Rome with Bruno Touschek in 1966. As a post-doctoral researcher he worked at the Nuclear Research Center in Frascati (where a permanent position was offered to him) and spent two years at the Massachusetts Institute of Technology and CERN. In 1974 he became Assistant Professor at the NORDITA in Copenhagen. In 1978 he came back for a year at CERN. In 1979 he became professor at the Free University of Berlin and from 1980 to 1986 he taught at the Bergische Universität Wuppertal. From 1986 he has been a professor at NORDITA. Since NORDITA moved to Stockholm he spent half of the time there and half of the time at the Niels Bohr Institute in Copenhagen. Work In the 1970s Di Vecchia was one of the pioneers of string theory. Among other things, he formul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terracina
Terracina is an Italian city and ''comune'' of the province of Latina, located on the coast southeast of Rome on the Via Appia ( by rail). The site has been continuously occupied since antiquity. History Ancient times Terracina appears in ancient sources with two names: the Latin Tarracina and the Volscian ''Anxur''. The latter is the name of Jupiter himself as a youth ( or ), and was the tutelary god of the city, venerated on the (current Monte S. Angelo), where a temple dedicated to him still exists (see below). The name has been instead pointed out variously as pre-Indo-European origin (Ταρρακινή in ancient Greek), or as Etruscan ( or , the name of the Tarquinii family): in this view, it would precede the Volscian conquest. Terracina occupied a position of notable strategic importance: it is located at the point where the Volscian Hills (an extension of the Lepini Mountains) reach the coast, leaving no space for passage between them and the sea, on a site comma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emilio Del Giudice
Emilio Del Giudice (1 January 1940 – 31 January 2014) was an Italian theoretical physicist who worked in the field of condensed matter. Pioneer of string theory in the early 1970s, later on he became better known for his work with Giuliano Preparata at the Italian Institute for Nuclear Physics (INFN); Biography During the 1970s, along with Sergio Fubini, Paolo Di Vecchia and Gabriele Veneziano, Del Giudice was at the center of an active school of theoretical physicists with close connections to Italy (with one of the Italian INFN and MIT financed "Bruno Rossi" exchange programs). He and his co-workers did fundamental work in string theory. Cambridge University Press, 2012, p. 352. For many years he was involved in |
1942 Births
Year 194 ( CXCIV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Septimius and Septimius (or, less frequently, year 947 ''Ab urbe condita''). The denomination 194 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Septimius Severus and Decimus Clodius Septimius Albinus Caesar become Roman Consuls. * Battle of Issus: Septimius Severus marches with his army (12 legions) to Cilicia, and defeats Pescennius Niger, Roman governor of Syria. Pescennius retreats to Antioch, and is executed by Severus' troops. * Septimius Severus besieges Byzantium (194–196); the city walls suffer extensive damage. Asia * Battle of Yan Province: Warlords Cao Cao and Lü Bu fight for control over Yan Province; the battle lasts for over 100 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Italian String Theorists
Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, an ethnic group or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance language *** Regional Italian, regional variants of the Italian language ** Languages of Italy, languages and dialects spoken in Italy ** Italian culture, cultural features of Italy ** Italian cuisine, traditional foods ** Folklore of Italy, the folklore and urban legends of Italy ** Mythology of Italy, traditional religion and beliefs Other uses * Italian dressing, a vinaigrette-type salad dressing or marinade * Italian or Italian-A, alternative names for the Ping-Pong virus, an extinct computer virus See also * * * Italia (other) * Italic (other) * Italo (other) * The Italian (other) * Italian people (other) Italian people may refer to: * in terms of ethnicity: all ethnic Italians, in and outside of Italy * in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Danish Academy Of Sciences And Letters
{{Infobox organization , name = The Royal Danish Academy of Sciences and Letters , full_name = , native_name = Det Kongelige Danske Videnskabernes Selskab , native_name_lang = , logo = Royal Danish Academy of Sciences and Letters seal.svg , logo_size = 150 , logo_alt = , logo_caption = , image = Carlsbergfondet.JPG , image_size = , alt = , caption = The building on H.C. Andersens Boulevard. , map = , map_size = , map_alt = , map_caption = , map2 = , map2_size = , map2_alt = , map2_caption = , abbreviation = , nickname = , pronounce = , pronounce ref = , pronounce comment = , pronounce 2 = , named_after = , motto = , predecessor = , merged ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holographic Principle
The holographic principle is an axiom in string theories and a supposed property of quantum gravity that states that the description of a volume of space can be thought of as encoded on a lower-dimensional boundary to the region — such as a light-like boundary like a gravitational horizon. First proposed by Gerard 't Hooft, it was given a precise string-theory interpretation by Leonard Susskind, who combined his ideas with previous ones of 't Hooft and Charles Thorn. Leonard Susskind said, “The three-dimensional world of ordinary experience––the universe filled with galaxies, stars, planets, houses, boulders, and people––is a hologram, an image of reality coded on a distant two-dimensional surface." As pointed out by Raphael Bousso, Thorn observed in 1978 that string theory admits a lower-dimensional description in which gravity emerges from it in what would now be called a holographic way. The prime example of holography is the AdS/CFT correspondence. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyakov Action
In physics, the Polyakov action is an action (physics), action of the two-dimensional conformal field theory describing the worldsheet of a string in string theory. It was introduced by Stanley Deser and Bruno Zumino and independently by Lars Brink, L. Brink, Paolo Di Vecchia, P. Di Vecchia and P. S. Howe in 1976, and has become associated with Alexander Markovich Polyakov, Alexander Polyakov after he made use of it in quantizing the string in 1981. The action reads : \mathcal = \frac \int\mathrm^2\sigma\, \sqrt\,h^ g_(X) \partial_a X^\mu(\sigma) \partial_b X^\nu(\sigma), where T is the string Tension (mechanics), tension, g_ is the metric of the target manifold, h_ is the worldsheet metric, h^ its inverse, and h is the determinant of h_. The metric signature is chosen such that timelike directions are + and the spacelike directions are −. The spacelike worldsheet coordinate is called \sigma, whereas the timelike worldsheet coordinate is called \tau. This is also known as the no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Markovich Polyakov
Alexander is a male given name. The most prominent bearer of the name is Alexander the Great, the king of the Ancient Greek kingdom of Macedonia who created one of the largest empires in ancient history. Variants listed here are Aleksandar, Aleksander and Aleksandr. Related names and diminutives include Iskandar, Alec, Alek, Alex, Alexandre, Aleks, Aleksa and Sander; feminine forms include Alexandra, Alexandria, and Sasha. Etymology The name ''Alexander'' originates from the (; 'defending men' or 'protector of men'). It is a compound of the verb (; 'to ward off, avert, defend') and the noun (, genitive: , ; meaning 'man'). It is an example of the widespread motif of Greek names expressing "battle-prowess", in this case the ability to withstand or push back an enemy battle line. The earliest attested form of the name, is the Mycenaean Greek feminine anthroponym , , (/Alexandra/), written in the Linear B syllabic script. Alaksandu, alternatively called ''Alakasandu'' or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bruno Zumino
Bruno Zumino (28 April 1923 − 21 June 2014) was an Italian theoretical physicist and faculty member at the University of California, Berkeley. He obtained his DSc degree from the University of Rome in 1945. He was renowned for his rigorous proof of the CPT theorem with Gerhart Lüders; his pioneering systematization of effective chiral Lagrangians; the discoveries, with Julius Wess, of the Wess–Zumino model, the first four-dimensional supersymmetric quantum field theory with Bose-Fermi degeneracy, and initiator of the field of supersymmetric radiative restrictions; a concise formulation of supergravity; and for his deciphering of structured flavor-chiral anomalies, codified in the Wess–Zumino–Witten model of conformal field theory. Awards * 1985 Membership in the National Academy of Sciences * 1987 Dirac Medal of the ICTP * 1988 Dannie Heineman Prize for Mathematical Physics * 1989 Max Planck Medal * 1992 Wigner Medal * 1992 Humboldt Research Award * 1999 Gian Car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stanley Deser
Stanley Deser (born 1931) is an American physicist known for his contributions to general relativity. Currently, he is emeritus Ancell Professor of Physics at Brandeis University in Waltham, Massachusetts and a senior research associate at California Institute of Technology. Biography Deser earned his B.A. (Summa cum laude) in 1949 at Brooklyn College in New York, and his master's degree 1950 at Harvard, where he also earned his doctorate in 1953, with a thesis entitled "Relativistic Two Body Interactions". From 1953 to 1955, he was at the Institute for Advanced Study in Princeton. He was at the Niels Bohr Institute from 1955 to 1957, and a lecturer at Harvard from 1957 to 1958. He was an invited professor at the Sorbonne during 1966–1967 and 1971–1972, he held a visiting professorship at All Souls College in Oxford in 1977, and a Loeb Lectureship at Harvard in 1975. In the context of general relativity, he developed, with Richard Arnowitt and Charles Misner, the ADM form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DDF States , a duty ...
DDF may refer to: Biology and medicine * Digestive Disorders Foundation, a British medical research charity *(N,N-dimethyl-amino)-benzenediazonium-fluoroborate, a photoaffinity probe that competes with acetylcholine for receptor binding * Sulfoxone, an anti-leprosy drug sold under “DDF” brand Technology * Digital distribution frame, a device which terminates digital data streams, allowing arbitrary interconnections to be made * 4,4'-Dinitro-3,3'-diazenofuroxan, an experimental high explosive * Disk Data Format, a structure describing how data is formatted across disks in a RAID group Other uses * Demographic Development Fund, Georgian think thank * ''Drop Dead Fred'', a 1991 fantasy comedy film * Dubai Duty Free Dubai Duty Free (DDF) is the company responsible for the duty-free operations at Dubai International Airport and Al Maktoum International Airport. Founded in December 1983, DDF recorded first-year sales of US$20 million and has grown into one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sergio Fubini
Sergio Fubini (December 31, 1928 – January 6, 2005) was an Italians, Italian theoretical physicist. He was one of the pioneers of string theory. He was engaged in peace activism in the Middle East. Biography Fubini was born in Turin. In 1938, he fled the country as a politically persecuted Jew to Switzerland. In 1945, he attended the Lycée in Turin, where he studied physics and in 1950 graduated "cum laude." Afterwards, he was an assistant in Turin. From 1954 to 1957, he was in the USA. From 1958 to 1967, he was at CERN in Geneva. In 1959, he became a professor for nuclear physics at University of Padua. In 1961, he became a professor for theoretical physics at University of Turin. From 1968 to 1973, he was at Massachusetts Institute of Technology, MIT, but taught summer courses in Turin. He went back to CERN in 1973 and was from 1971 to 1980 a member of the advisory board and had an important role in planning the Large Electron Positron Collider (LEP) as well as in discussion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
