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Friedrich Paschen
Louis Carl Heinrich Friedrich Paschen (22 January 1865 - 25 February 1947), was a German physicist, known for his work on electrical discharges. He is also known for the Paschen series, a series of hydrogen spectral lines in the infrared region that he first observed in 1908. He established the now widely used Paschen curve in his article ''"Über die zum Funkenübergang in Luft, Wasserstoff und Kohlensäure bei verschiedenen Drücken erforderliche Potentialdifferenz"''. He is known for the Paschen-Back effect, which is the Zeeman effect's becoming non-linear at high magnetic field. He helped explain the hollow cathode effect in 1916. Life Paschen was born in Schwerin, Mecklenburg-Schwerin. From 1884 to 1888 he studied at the universities of Berlin and Strassburg, after which he became an assistant at the Academy of Münster. He became a professor at the Technical Academy of Hannover in 1893 and professor of physics at the University of Tübingen in 1901. He served as presiden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schwerin
Schwerin (; Mecklenburgian Low German: ''Swerin''; Latin: ''Suerina'', ''Suerinum'') is the capital and second-largest city of the northeastern German state of Mecklenburg-Vorpommern as well as of the region of Mecklenburg, after Rostock. It has around 96,000 inhabitants, and is thus the least populous of all German state capitals. Schwerin is located on the southwestern shore of Lake Schwerin (''Schweriner See''), the second-largest lake of the Mecklenburg Lake Plateau after the Müritz, and there are eleven other lakes within Schwerin's city limits. The city is surrounded by the district of Northwestern Mecklenburg to the north, and the district of Ludwigslust-Parchim to the south. Schwerin and the two surrounding districts form the eastern outskirts of the Hamburg Metropolitan Region. The name of the city is of Slavic origin, deriving from the root "zvěŕ" (''wild animal'') or "zvěŕin" ('' game reserve'', ''animal garden'', '' stud farm''). Schwerin was first menti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Tübingen
The University of Tübingen, officially the Eberhard Karl University of Tübingen (german: Eberhard Karls Universität Tübingen; la, Universitas Eberhardina Carolina), is a public research university located in the city of Tübingen, Baden-Württemberg, Germany. The University of Tübingen is one of eleven German Excellence Universities. The University of Tübingen is especially known as a centre for the study of plant biology, medicine, law, archeology, ancient cultures, philosophy, theology, and religious studies as well as more recently as center of excellence for artificial intelligence. The university's noted alumni include presidents, EU Commissioners, and judges of the Federal Constitutional Court. The university is associated with eleven Nobel laureates, especially in the fields of medicine and chemistry. History The University of Tübingen was founded in 1477 by Count Eberhard V (Eberhard im Bart, 1445–1496), later the first Duke of Württemberg, a civic a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humboldt University Of Berlin Faculty
Humboldt may refer to: People * Alexander von Humboldt, German natural scientist, brother of Wilhelm von Humboldt * Wilhelm von Humboldt, German linguist, philosopher, and diplomat, brother of Alexander von Humboldt Fictional characters * Humboldt Fleisher, character in novel '' Humboldt's Gift'' * Wes Humboldt, character played by Mike O’Brien on '' Corner Gas'' Places Australia * Humboldt, Queensland, a locality in the Central Highlands Region Canada * Humboldt, Saskatchewan * Rural Municipality of Humboldt No. 370, Saskatchewan * Humboldt (electoral district), a former federal electoral district * Humboldt (provincial electoral district), a former Saskatchewan provincial electoral district United States * Settled places: ** Dewey-Humboldt, Arizona ** Humboldt, Illinois ** Humboldt, Iowa ** Humboldt, Kansas ** Humboldt, Minnesota ** Humboldt, Nebraska ** Humboldt, Ohio ** Humboldt, Portland, Oregon ** Humboldt, Pennsylvania ** Humboldt, South Dakota ** Humbol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humboldt University Of Berlin Alumni
Humboldt may refer to: People * Alexander von Humboldt, German natural scientist, brother of Wilhelm von Humboldt * Wilhelm von Humboldt, German linguist, philosopher, and diplomat, brother of Alexander von Humboldt Fictional characters * Humboldt Fleisher, character in novel '' Humboldt's Gift'' * Wes Humboldt, character played by Mike O’Brien on '' Corner Gas'' Places Australia * Humboldt, Queensland, a locality in the Central Highlands Region Canada * Humboldt, Saskatchewan * Rural Municipality of Humboldt No. 370, Saskatchewan * Humboldt (electoral district), a former federal electoral district * Humboldt (provincial electoral district), a former Saskatchewan provincial electoral district United States * Settled places: ** Dewey-Humboldt, Arizona ** Humboldt, Illinois ** Humboldt, Iowa ** Humboldt, Kansas ** Humboldt, Minnesota ** Humboldt, Nebraska ** Humboldt, Ohio ** Humboldt, Portland, Oregon ** Humboldt, Pennsylvania ** Humboldt, South Dakota ** Humbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From The Grand Duchy Of Mecklenburg-Schwerin
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Schwerin
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century German Physicists
The 19th (nineteenth) century began on 1 January 1801 ( MDCCCI), and ended on 31 December 1900 ( MCM). The 19th century was the ninth century of the 2nd millennium. The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. It was also marked by the collapse of the la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1947 Deaths
It was the first year of the Cold War, which would last until 1991, ending with the dissolution of the Soviet Union. Events January * January– February – Winter of 1946–47 in the United Kingdom: The worst snowfall in the country in the 20th century causes extensive disruption of travel. Given the low ratio of private vehicle ownership at the time, it is mainly remembered in terms of its effects on the railway network. * January 1 - The Canadian Citizenship Act comes into effect. * January 4 – First issue of weekly magazine ''Der Spiegel'' published in Hanover, Germany, edited by Rudolf Augstein. * January 10 – The United Nations adopts a resolution to take control of the free city of Trieste. * January 15 – Elizabeth Short, an aspiring actress nicknamed the " Black Dahlia", is found brutally murdered in a vacant lot in Los Angeles; the mysterious case is never solved. * January 16 – Vincent Auriol is inaugurated as president of France. * January 19 � ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1865 Births
Events January–March * January 4 – The New York Stock Exchange opens its first permanent headquarters at 10-12 Broad near Wall Street, in New York City. * January 13 – American Civil War : Second Battle of Fort Fisher: United States forces launch a major amphibious assault against the last seaport held by the Confederates, Fort Fisher, North Carolina. * January 15 – American Civil War: United States forces capture Fort Fisher. * January 31 ** The Thirteenth Amendment to the United States Constitution (conditional prohibition of slavery and involuntary servitude) passes narrowly, in the House of Representatives. ** American Civil War: Confederate General Robert E. Lee becomes general-in-chief. * February ** American Civil War: Columbia, South Carolina burns, as Confederate forces flee from advancing Union forces. * February 3 – American Civil War : Hampton Roads Conference: Union and Confederate leaders discuss peace terms. * Feb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Townsend Discharge
The Townsend discharge or Townsend avalanche is a gas ionisation process where free electrons are accelerated by an electric field, collide with gas molecules, and consequently free additional electrons. Those electrons are in turn accelerated and free additional electrons. The result is an avalanche multiplication that permits electrical conduction through the gas. The discharge requires a source of free electrons and a significant electric field; without both, the phenomenon does not occur. The Townsend discharge is named after John Sealy Townsend, who discovered the fundamental ionisation mechanism by his work circa 1897 at the Cavendish Laboratory, Cambridge. General description of the phenomenon The avalanche occurs in a gaseous medium that can be ionised (such as air). The electric field and the mean free path of the electron must allow free electrons to acquire an energy level (velocity) that can cause impact ionisation. If the electric field is too small, then the el ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Term Symbol
In quantum mechanics, the term symbol is an abbreviated description of the (total) angular momentum quantum numbers in a multi-electron atom (however, even a single electron can be described by a term symbol). Each energy level of an atom with a given electron configuration is described by not only the electron configuration but also its own term symbol, as the energy level also depends on the total angular momentum including spin. The usual atomic term symbols assume LS coupling (also known as Russell– Saunders coupling or spin-orbit coupling). The ground state term symbol is predicted by Hund's rules. The use of the word ''term'' for an energy level is based on the Rydberg–Ritz combination principle, an empirical observation that the wavenumbers of spectral lines can be expressed as the difference of two ''terms''. This was later summarized by the Bohr model, which identified the terms (multiplied by ''hc'', where ''h'' is the Planck constant and ''c'' the speed of light) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaiser Wilhelm Institute
The Kaiser Wilhelm Society for the Advancement of Science (German: ''Kaiser-Wilhelm-Gesellschaft zur Förderung der Wissenschaften'') was a German scientific institution established in the German Empire in 1911. Its functions were taken over by the Max Planck Society. The Kaiser Wilhelm Society was an umbrella organisation for many institutes, testing stations, and research units created under its authority. Constitution The Kaiser Wilhelm Gesellschaft (KWG) was founded in 1911 in order to promote the natural sciences in Germany, by founding and maintaining research institutions formally independent from the state and its administrations. The institutions were to be under the guidance of prominent directors, which included the physicists and chemists Walther Bothe, Peter Debye, Albert Einstein, Fritz Haber and Otto Hahn; a board of trustees also provided guidance. Funding was ultimately obtained from sources internal and external to Germany. Internally, money was raised f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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