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Robert Ochsenfeld
Robert Ochsenfeld (18 May 1901 – 5 December 1993) was a German physicist. In 1933 he discovered together with Walther Meissner the Meissner–Ochsenfeld effect. Born in Helberhausen, Germany, Ochsenfeld studied physics at the Philipps University of Marburg. The subject of his PhD was the study of ferromagnetism.Das Auftreten des Ferromagnetismus im System Mangan-Stickstoff. In: Annalen der Physik, Folge 5, Band 12, Heft 3: S. 253–384. In 1932-1933 he worked at the Physikalisch-Technische Reichsanstalt (PTR) in Berlin in the low temperature group headed by Meissner. Leaving the PTR, he taught at the National Political Institutes of Education in Potsdam until 1940, followed by research for new weapons in World War II. After the war, he worked until retirement in the Physikalisch-Technische Bundesanstalt The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute of the Federal Republic of Germany, with scientific and technical service tasks. It is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physicist
A physicist is a scientist who specializes in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe. Physicists generally are interested in the root or ultimate causes of Phenomenon, phenomena, and usually frame their understanding in mathematical terms. They work across a wide range of Physics#Research fields, research fields, spanning all length scales: from atom, sub-atomic and particle physics, through biological physics, to physical cosmology, cosmological length scales encompassing the universe as a whole. The field generally includes two types of physicists: Experimental physics, experimental physicists who specialize in the observation of natural phenomena and the development and analysis of experiments, and Theoretical physics, theoretical physicists who specialize in mathematical modeling of physical systems to rationalize, explain and predict natural phenomena. Physicists can apply their k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walther Meissner
Fritz Walther Meißner (anglicized: ''Meissner'') (16 December 1882 – 16 November 1974) was a German technical physicist. Meißner was born in Berlin to Waldemar Meißner and Johanna Greger. He studied mechanical engineering and physics at the Technische Hochschule in Charlottenburg (now Technische Universität Berlin), his doctoral supervisor being Max Planck. He then entered the Physikalisch-Technische Bundesanstalt in Berlin. From 1922 to 1925, he established the world's third largest helium-liquifier, and discovered in 1933 the Meissner effect,Walther Meißner and R. Ochsenfeld, Naturwissenschaften V21, p. 787 (1933). damping of the magnetic field in superconductors. One year later, he was called as chair in technical physics at the Technical University of Munich. After World War II, he became the president of the Bavarian Academy of Sciences and Humanities The Bavarian Academy of Sciences and Humanities () is an independent public institution, located in Munich. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meissner Effect
In condensed-matter physics, the Meissner effect (or Meißner–Ochsenfeld effect) is the expulsion of a magnetic field from a superconductor during its transition to the superconducting state when it is cooled below the critical temperature. This expulsion will repel a nearby magnet. The German physicists Walther Meissner, Walther Meißner (anglicized ''Meissner'') and Robert Ochsenfeld discovered this phenomenon in 1933 by measuring the magnetic field distribution outside superconducting tin and lead samples. The samples, in the presence of an applied magnetic field, were cooled below their Superconductivity#Superconducting phase transition, superconducting transition temperature, whereupon the samples cancelled nearly all interior magnetic fields. They detected this effect only indirectly because the magnetic flux is conserved by a superconductor: when the interior field decreases, the exterior field increases. The experiment demonstrated for the first time that superconducto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herberhausen
Herberhausen is a village (borough:''Ortsteil'') belonging to Göttingen, Lower Saxony, in Germany Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total popu .... Geography The village lies to the east of downtown Göttingen, in the Luttertal (valley), under the shadow of the Göttingen Forest, which rises steeply upriver and on both sides of the upper village. The village centre's elevation is 240 metres above sea level. The total area allotted to the borough (mostly forest) is 1524 ha. Etymology In the fourteenth century, the community was called Herborgehusen and Herbergehusen. Toward the end of that century, the shortened form "Herberhusen" became the standard form. History The earliest written document mentioning the town is from the year 1293. On 1 April 1963 the village was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany, officially the Federal Republic of Germany, is a country in Central Europe. It lies between the Baltic Sea and the North Sea to the north and the Alps to the south. Its sixteen States of Germany, constituent states have a total population of over 84 million in an area of , making it the most populous member state of the European Union. It borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The Capital of Germany, nation's capital and List of cities in Germany by population, most populous city is Berlin and its main financial centre is Frankfurt; the largest urban area is the Ruhr. Settlement in the territory of modern Germany began in the Lower Paleolithic, with various tribes inhabiting it from the Neolithic onward, chiefly the Celts. Various Germanic peoples, Germanic tribes have inhabited the northern parts of modern Germany since classical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philipps University Of Marburg
Philipps is an English language, English, Dutch language, Dutch, and German language, German surname meaning "lover of horses". Derivative, patronym, of the more common ancient Greek name "Philippos and Philippides." Notable people with this surname are: "Philipps" has also been a shortened version of Philippson, a German language, German surname especially prevalent amongst German Jews and Dutch Jews. * Busy Philipps (born 1979), American film actress * Colwyn Philipps, 3rd Viscount St Davids (1939–2009), British peer * Kinga Philipps (born 1976), American actress * Rhodri Philipps (born 1966), eldest son of the current Viscount St Davids * Richard Philipps (1661–1750), British Governor of Nova Scotia * Sir John Philipps, 6th Baronet (circa 1701–1764), Welsh Jacobite politician * Sir Owen Cosby Philipps (1863–1937), Knight of Justice of the Order of St John * Wogan Philipps, 2nd Baron Milford (1902–1993), only member of the Communist Party of Great Britain ever to sit in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferromagnetism
Ferromagnetism is a property of certain materials (such as iron) that results in a significant, observable magnetic permeability, and in many cases, a significant magnetic coercivity, allowing the material to form a permanent magnet. Ferromagnetic materials are noticeably attracted to a magnet, which is a consequence of their substantial magnetic permeability. Magnetic permeability describes the induced magnetization of a material due to the presence of an external magnetic field. For example, this temporary magnetization inside a steel plate accounts for the plate's attraction to a magnet. Whether or not that steel plate then acquires permanent magnetization depends on both the strength of the applied field and on the coercivity of that particular piece of steel (which varies with the steel's chemical composition and any heat treatment it may have undergone). In physics, multiple types of material magnetism have been distinguished. Ferromagnetism (along with the similar effec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berlin
Berlin ( ; ) is the Capital of Germany, capital and largest city of Germany, by both area and List of cities in Germany by population, population. With 3.7 million inhabitants, it has the List of cities in the European Union by population within city limits, highest population within its city limits of any city in the European Union. The city is also one of the states of Germany, being the List of German states by area, third smallest state in the country by area. Berlin is surrounded by the state of Brandenburg, and Brandenburg's capital Potsdam is nearby. The urban area of Berlin has a population of over 4.6 million and is therefore the most populous urban area in Germany. The Berlin/Brandenburg Metropolitan Region, Berlin-Brandenburg capital region has around 6.2 million inhabitants and is Germany's second-largest metropolitan region after the Rhine-Ruhr region, as well as the List of EU metropolitan areas by GDP, fifth-biggest metropolitan region by GDP in the European Union. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Political Institutes Of Education
National Political Institutes of Education (; officially abbreviated NPEA, commonly abbreviated Napola for ''Nationalpolitische Lehranstalt'' meaning National Political Teaching Institute) were secondary boarding schools in Nazi Germany. They were founded as ‘community education sites’ after the Nazi seizure of power in 1933. Mission The main task of the NPEA was the "education of National Socialists, efficient in body and soul for the service to the people and the state". The pupils attending these schools were meant to become the future leadership of Germany – political, administrative, and military. Until the beginning of World War II on 1 September 1939, the Napolas served as strong politically-accentuated elite preparatory schools within the framework of the general higher education system. During the war, they increasingly developed into preparatory schools for entry into the Wehrmacht and Waffen-SS. In keeping with their unique nature, Napola schools operated sepa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potsdam
Potsdam () is the capital and largest city of the Germany, German States of Germany, state of Brandenburg. It is part of the Berlin/Brandenburg Metropolitan Region. Potsdam sits on the Havel, River Havel, a tributary of the Elbe, downstream of Berlin, and lies embedded in a hilly morainic landscape dotted with many lakes, around 20 of which are located within Potsdam's city limits. It lies some southwest of Berlin's city centre. The name of the city and of many of its boroughs are of Slavic languages, Slavic origin. Potsdam was a residence of the Prussian kings and the German Emperor until 1918. Its planning embodied ideas of the Age of Enlightenment: through a careful balance of architecture and landscape, Potsdam was intended as "a picturesque, pastoral dream" which would remind its residents of their relationship with nature and reason. The city, which is over 1,000 years old, is widely known for its palaces, its lakes, and its overall historical and cultural significance. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks in World War II, Tanks and Air warfare of World War II, aircraft played major roles, enabling the strategic bombing of cities and delivery of the Atomic bombings of Hiroshima and Nagasaki, first and only nuclear weapons ever used in war. World War II is the List of wars by death toll, deadliest conflict in history, causing World War II casualties, the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Allied-occupied Germany, Germany, Allied-occupied Austria, Austria, Occupation of Japan, Japan, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physikalisch-Technische Bundesanstalt
The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute of the Federal Republic of Germany, with scientific and technical service tasks. It is a higher federal authority and a public-law institution directly under federal government control, without legal capacity, under the auspices of the Federal Ministry for Economic Affairs and Climate Action. Tasks Together with NIST in the USA and the National Physical Laboratory (United Kingdom), NPL in Great Britain, PTB ranks among the leading metrology institutes in the world. As the National Metrology Institute of Germany, PTB is Germany's highest and only authority in terms of correct and reliable measurements. The Units and Time Act Bundesgesetzblatt (Germany), Bundesgesetzblatt (Federal Law Gazette), volume 2008, part I, No. 28, p. 1185 ff., 11 July 2008] assigns all tasks which are related with the realization and dissemination of the units to PTB. All legally relevant aspects regarding the units ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
