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Günther Porod
Günther Porod (; 1919 in Faak am See near Villach – 1984 in Graz) was an Austrian physicist. He is best known for his work on the small-angle X-ray scattering method, done in collaboration with his teacher Otto Kratky, and in particular for Porod's law, which describes the asymptote of the scattering intensity ''I(q)'' for large scattering wave numbers ''q''. In polymer physics, the worm-like chain model, introduced in a 1949 paper, is sometimes called the Kratky–Porod model. In 1965 Porod was appointed as professor of experimental physics at the university of Graz. In 1978, he was awarded the Erwin Schrödinger-Preis. See also *Lyman G. Parratt Lyman G. Parratt (May 17, 1908 - June 29, 1995) was an American physicist. He is known for various research using x-rays. Parratt was born in Salt Lake City. In 1954, Parratt used x-rays to explore the surface of copper-coated glass, thereby creat ..., American x-ray physicist with somewhat similar name. References {{ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finkenstein Am Faaker See
Finkenstein am Faaker See ( sl, Bekštanj) is a market town in the district of Villach-Land in Carinthia, Austria. Geography It is located south of Villach and the Drava River, on the northern slope of the Karawanks with Mt. Mittagskogel (''Kepa''), close to the border with Slovenia. The municipal area comprises the southern shore of Lake Faak. The municipality includes the cadastral community of Faak am See (''Bače''), Ferlach (''Borovlje''), Fürnitz (''Brnca''), Greuth (''Rute''), Gödersdorf (''Vodiča vas''), Korpitsch (''Grpiče''), Latschach am Faakersee (''Loče''), Mallestig (''Malošče'') and Sankt Stefan (''Šteben''). According to the 2001 census, 5.6% of the population are Carinthian Slovenes. History The municipality is named after Finkenstein Castle, a possession of the Carinthian dukes, which was first mentioned in an 1142 deed. Lend to the ducal ministeriales, the Lords of Finkenstein, it was an important outpost overlooking the Gail valley and the Carinthia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Villach
Villach (; sl, Beljak; it, Villaco; fur, Vilac) is the seventh-largest city in Austria and the second-largest in the federal state of Carinthia. It is an important traffic junction for southern Austria and the whole Alpe-Adria region. , the population is 61,887. Together with other Alpine towns Villach engages in the Alpine Town of the Year Association for the implementation of the Alpine Convention to achieve sustainable development in the Alpine Arc. In 1997, Villach was the first town to be awarded Alpine Town of the Year. Geography Villach is a statutory city, on the Drau River near its confluence with the Gail tributary, at the western rim of the Klagenfurt basin. The municipal area stretches from the slopes of the Gailtal Alps (Mt. Dobratsch) down to Lake Ossiach in the northeast. The Villach city limits comprise the following districts and villages: }) * Dobrova (''Dobrova'') * Drautschen (''Dravče'') * Drobollach am Faaker See (''Drobolje ob Baškem jezeru'') ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graz
Graz (; sl, Gradec) is the capital city of the Austrian state of Styria and second-largest city in Austria after Vienna. As of 1 January 2021, it had a population of 331,562 (294,236 of whom had principal-residence status). In 2018, the population of the Graz larger urban zone (LUZ) stood at 652,654, based on principal-residence status. Graz is known as a college and university city, with four colleges and four universities. Combined, the city is home to more than 60,000 students. Its historic centre ('' Altstadt'') is one of the best-preserved city centres in Central Europe. In 1999, the city's historic centre was added to the UNESCO list of World Heritage Sites and in 2010 the designation was expanded to include Eggenberg Palace (german: Schloss Eggenberg) on the western edge of the city. Graz was designated the Cultural Capital of Europe in 2003 and became a City of Culinary Delights in 2008. Etymology The name of the city, Graz, formerly spelled Gratz, most likely stems ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small-angle X-ray Scattering
Small-angle X-ray scattering (SAXS) is a small-angle scattering technique by which nanoscale density differences in a sample can be quantified. This means that it can determine nanoparticle size distributions, resolve the size and shape of (monodisperse) macromolecules, determine pore sizes, characteristic distances of partially ordered materials, and much more. This is achieved by analyzing the elastic scattering behaviour of X-rays when travelling through the material, recording their scattering at small angles (typically 0.1 – 10°, hence the "Small-angle" in its name). It belongs to the family of small-angle scattering (SAS) techniques along with small-angle neutron scattering, and is typically done using hard X-rays with a wavelength of 0.07 – 0.2 nm.. Depending on the angular range in which a clear scattering signal can be recorded, SAXS is capable of delivering structural information of dimensions between 1 and 100 nm, and of repeat distances in partially ordered s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto Kratky
Otto Kratky (; born 9 March 1902 in Vienna – died 11 February 1995 in Graz) was an Austrian physicist. He is best known for his contribution to the small-angle X-ray scattering method, for the Kratky plot, and for the invention of the density metering using the oscillating u-tube principle. The worm-like chain model in polymer physics, introduced with Günther Porod in a 1949 paper, is also named the Kratky–Porod model. Education and career Otto Kratky was born in Vienna as the son of the painter Rudolf Kratky. After graduating from high school, he studied chemistry at the Technical University Vienna and completed his studies in 1929 with a doctorate. After completing his university education, he became an assistant at the Kaiser Wilhelm Institute in Berlin-Dahlem in 1928, a position he held until 1933. He then worked as a university lecturer at the University of Vienna until he returned to the Institute for Physical Chemistry and Electrochemistry of the Kaiser Wilhelm Inst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porod's Law
In X-ray or neutron small-angle scattering (SAS), Porod's law, discovered by Günther Porod, describes the asymptote of the scattering intensity ''I(q)'' for large scattering wavenumbers ''q''. Context Porod's law is concerned with wave numbers ''q'' that are small compared to the scale of usual Bragg diffraction; typically q\lesssim1\text^. In this range, the sample must not be described at an atomistic level; one rather uses a continuum description in terms of an electron density or a neutron scattering length density. In a system composed of distinct mesoscopic particles, all small-angle scattering can be understood as arising from surfaces or interfaces. Normally, SAS is measured in order to detect correlations between different interfaces, and in particular, between remote surface segments of one and the same particle. This allows conclusions about the size and shape of the particles, and their correlations. Porod's ''q'' is relatively large on the usual scale of SAS. In thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Worm-like Chain
The worm-like chain (WLC) model in polymer physics is used to describe the behavior of polymers that are semi-flexible: fairly stiff with successive segments pointing in roughly the same direction, and with persistence length within a few orders of magnitude of the polymer length. The WLC model is the continuous version of the Kratky– Porod model. Model elements The WLC model envisions a continuously flexible isotropic rod. This is in contrast to the freely-jointed chain model, which is only flexible between discrete freely hinged segments. The model is particularly suited for describing stiffer polymers, with successive segments displaying a sort of cooperativity: nearby segments are roughly aligned. At room temperature, the polymer adopts a smoothly curved conformation; at T = 0 K, the polymer adopts a rigid rod conformation. For a polymer of maximum length L_0, parametrize the path of the polymer as s \in(0,L_0). Allow \hat t(s) to be the unit tangent vector to the chai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erwin Schrödinger-Preis
Erwin may refer to: People Given name * Erwin Chargaff (1905–2002), Austrian biochemist * Erwin Dold (1919–2012), German concentration camp commandant in World War 2 * Erwin Hauer (1926–2017), Austrian-born American sculptor * Egon Erwin Kisch (1885–1948), Czechoslovak writer and journalist * Erwin Emata (born 1973), Filipino mountain climber * Erwin James (born 1957), British writer and journalist * Erwin Klein (died 1992), American table tennis player * Erwin Koeman (born 1961), Dutch footballer and coach * Erwin Kramer (1902–1979), East German politician * Erwin Kreyszig (1922–2008), American academic * Erwin Neutzsky-Wulff (born 1949), Danish author and philosopher * Erwin Osen (1891–1970), Austrian mime artist * Erwin Panofsky (1892-1968), German-Jewish art historian * Erwin Ramírez (born 1971), Ecuadorian football player * Erwin Rommel (1891–1944), German field marshal of World War II * Erwin Rösener (1902–1946), German Nazi SS officer executed for war cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyman G
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{{disambiguation, geo ...
Lyman may refer to: Places Ukraine * Lyman, Ukraine United States * Lyman, Iowa * Lyman, Maine * Lyman, Mississippi * Lyman, Nebraska * Lyman, New Hampshire * Lyman, Oklahoma * Lyman, South Carolina * Lyman, South Dakota * Lyman County, South Dakota * Lyman, Utah * Lyman, Washington * Lyman, Wyoming Other uses * Lyman (crater), a lunar impact crater * Lyman (name) * Lyman series of hydrogen spectral lines See also * Liman (other) * Lyman High School (other) Lyman High School may refer to: * Lyman Memorial High School, Lebanon, Connecticut * Lyman High School (Florida), Longwood, Florida * Lyman High School (South Dakota), Presho, South Dakota * Lyman High School (Wyoming), Lyman, Wyoming See also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1919 Births
Events January * January 1 ** The Czechoslovak Legions occupy much of the self-proclaimed "free city" of Pressburg (now Bratislava), enforcing its incorporation into the new republic of Czechoslovakia. ** HMY ''Iolaire'' sinks off the coast of the Hebrides; 201 people, mostly servicemen returning home to Lewis and Harris, are killed. * January 2– 22 – Russian Civil War: The Red Army's Caspian-Caucasian Front begins the Northern Caucasus Operation against the White Army, but fails to make progress. * January 3 – The Faisal–Weizmann Agreement is signed by Emir Faisal (representing the Arab Kingdom of Hejaz) and Zionist leader Chaim Weizmann, for Arab–Jewish cooperation in the development of a Jewish homeland in Palestine, and an Arab nation in a large part of the Middle East. * January 5 – In Germany: ** Spartacist uprising in Berlin: The Marxist Spartacus League, with the newly formed Communist Party of Germany and the Independent Social De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1984 Deaths
Events January * January 1 – The Bornean Sultanate of Brunei gains full independence from the United Kingdom, having become a British protectorate in 1888. * January 7 – Brunei becomes the sixth member of the Association of Southeast Asian Nations (ASEAN). * January 10 ** The United States and the Vatican (Holy See) restore full diplomatic relations. ** The Victoria Agreement is signed, institutionalising the Indian Ocean Commission. *January 24 – Steve Jobs launches the Macintosh personal computer in the United States. February * February 3 ** Dr. John Buster and the research team at Harbor–UCLA Medical Center announce history's first embryo transfer from one woman to another, resulting in a live birth. ** STS-41-B: Space Shuttle ''Challenger'' is launched on the 10th Space Shuttle mission. * February 7 – Astronauts Bruce McCandless II and Robert L. Stewart make the first untethered space walk. * February 8– 19 – The 1984 Winter Olympics are held i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austrian Physicists
Austrian may refer to: * Austrians, someone from Austria or of Austrian descent ** Someone who is considered an Austrian citizen, see Austrian nationality law * Austrian German dialect * Something associated with the country Austria, for example: ** Austria-Hungary ** Austrian Airlines (AUA) ** Austrian cuisine ** Austrian Empire ** Austrian monarchy ** Austrian German (language/dialects) ** Austrian literature ** Austrian nationality law ** Austrian Service Abroad ** Music of Austria **Austrian School of Economics * Economists of the Austrian school of economic thought * The Austrian Attack variation of the Pirc Defence chess opening. See also * * * Austria (other) * Australian (other) * L'Autrichienne (other) is the feminine form of the French word , meaning "The Austrian". It may refer to: *A derogatory nickname for Queen Marie Antoinette of France *L'Autrichienne (film), ''L'Autrichienne'' (film), a 1990 French film on Marie Antoinette with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
