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Gustav Heinrich Johann Apollon Tammann
Gustav Heinrich Johann Apollon Tammann ( – 17 December 1938) was a prominent Baltic German chemist-physicist who made important contributions in the fields of glassy and solid solutions, heterogeneous equilibria, crystallization, and metallurgy. He first predicted the order-disorder transition in alloys. Biography Tammann was born in Yamburg (now Kingisepp, Leningrad Oblast). His father, Heinrich Tammann (1833–1864) was of Estonian peasant origin and his mother, Matilda Schünmann, was of German origin. Tammann graduated from University of Dorpat in chemistry. He went to Göttingen University in 1903 where he established the first Institute of Inorganic Chemistry in Germany. In 1908 he was appointed director of the Physico-Chemical Institute. Tammann died in Göttingen at age 77. Research In 1900, he discovered the phases of ice, now known as ice II and ice III. Later, his interests focused on the physics and physical chemistry of metals and alloys (metallurgy). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingisepp
Kingisepp ( or ), formerly Yamburg (), Yam (), and Yama (; Votic language, Votic: Jaama), is a types of inhabited localities in Russia, town and the administrative center of Kingiseppsky District of Leningrad Oblast, Russia, located along the Luga River southwest of Saint Petersburg, St. Petersburg, east of Narva, and south of the Gulf of Finland. Population: History 14th century The town was first documented in 1384, when the Novgorod Republic, Novgorodians under Patrikas built there a Yam fortress, fortress against the Swedes. It was called Yama or Yamsky Gorodok, after the Izhorians, Izhorian (ethnic Baltic Finns, Finnic group) name Jaama. The environs of the town are still cited as the main location of speakers of the nearly extinct Ingrian language, Izhorian language. The citadel withstood sieges by the Swedes in 1395 and by the Teutonic Knights during the 1444–1448 war. 15-16th century The town became the most important economic center of the of the Novgor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Order-disorder Transition
In physics, the terms order and disorder designate the presence or absence of some symmetry or correlation in a many-particle system. In condensed matter physics, systems typically are ordered at low temperatures; upon heating, they undergo one or several phase transitions into less ordered states. Examples for such an order-disorder transition are: * the melting of ice: solid–liquid transition, loss of crystalline order; * the demagnetization of iron by heating above the Curie temperature: ferromagnetic–paramagnetic transition, loss of magnetic order. The degree of freedom that is ordered or disordered can be translational (crystalline ordering), rotational (ferroelectric ordering), or a spin state (magnetic ordering). The order can consist either in a full crystalline space group symmetry, or in a correlation. Depending on how the correlations decay with distance, one speaks of long range order or short range order. If a disordered state is not in thermodynamic equilib ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Metallurgists
German(s) may refer to: * Germany, the country of the Germans and German things **Germania (Roman era) * Germans, citizens of Germany, people of German ancestry, or native speakers of the German language ** For citizenship in Germany, see also German nationality law **Germanic peoples (Roman era) *German diaspora * German language * German cuisine, traditional foods of Germany People * German (given name) * German (surname) * Germán, a Spanish name Places * German (parish), Isle of Man * German, Albania, or Gërmej * German, Bulgaria * German, Iran * German, North Macedonia * German, New York, U.S. * Agios Germanos, Greece Other uses * German (mythology), a South Slavic mythological being * Germans (band), a Canadian rock band * "German" (song), a 2019 song by No Money Enterprise * ''The German'', a 2008 short film * "The Germans", an episode of ''Fawlty Towers'' * ''The German'', a nickname for Congolese rebel André Kisase Ngandu See also * Germanic (disambiguat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baltic-German People From The Russian Empire
Baltic Germans ( or , later ) are ethnic German inhabitants of the eastern shores of the Baltic Sea, in what today are Estonia and Latvia. Since their resettlement in 1945 after the end of World War II, Baltic Germans have drastically declined as a geographically determined ethnic group in the region, with diaspora generally relocating to Germany proper and beyond. Since the late Middle Ages, native German-speakers formed the majority of merchants and clergy, and the large majority of the local landowning nobility who effectively constituted a ruling class over indigenous Latvian and Estonian non-nobles. By the time a distinct Baltic German ethnic identity began emerging in the 19th century, the majority of self-identifying Baltic Germans were non-nobles belonging mostly to the urban and professional middle class. In the 12th and 13th centuries, Catholic German traders and crusaders (''see '') began settling in the eastern Baltic territories. With the decline of Latin, L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From Kingisepp
The term "the people" refers to the public or Common people, common mass of people of a polity. As such it is a concept of human rights law, international law as well as constitutional law, particularly used for claims of popular sovereignty. In contrast, a people is any plurality of Person, persons considered as a whole. Used in politics and law, the term "a people" refers to the collective or community of an ethnic group or nation. Concepts Legal Chapter One, Article One of the Charter of the United Nations states that "peoples" have the right to self-determination. Though the mere status as peoples and the right to self-determination, as for example in the case of Declaration on the Rights of Indigenous Peoples, Indigenous peoples (''peoples'', as in all groups of indigenous people, not merely all indigenous persons as in ''indigenous people''), does not automatically provide for independence, independent sovereignty and therefore secession. Indeed, judge Ivor Jennings i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1938 Deaths
Events January * January 1 – state-owned enterprise, State-owned railway networks are created by merger, in France (SNCF) and the Netherlands (Nederlandse Spoorwegen – NS). * January 20 – King Farouk of Egypt marries Safinaz Zulficar, who becomes Farida of Egypt, Queen Farida, in Cairo. * January 27 – The Honeymoon Bridge (Niagara Falls), Honeymoon Bridge at Niagara Falls, New York, collapses as a result of an ice jam. February * February 4 ** Adolf Hitler abolishes the War Ministry and creates the Oberkommando der Wehrmacht (High Command of the Armed Forces), giving him direct control of the German military. In addition, he dismisses political and military leaders considered unsympathetic to his philosophy or policies. General Werner von Fritsch is forced to resign as Commander of Chief of the German Army following accusations of homosexuality, and replaced by General Walther von Brauchitsch. Foreign Minister Baron Konstantin von Neurath is dismi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1861 Births
This year saw significant progress in the Unification of Italy, the outbreak of the American Civil War, and the Emancipation reform of 1861, emancipation reform abolishing serfdom in the Russian Empire. Events January * January 1 ** Benito Juárez captures Mexico City. ** The first steam-powered carousel is recorded, in Bolton, England. * January 2 – Frederick William IV of Prussia, Friedrich Wilhelm IV of Prussia dies, and is succeeded by Wilhelm I of Germany, Wilhelm I. American Civil War: ** January 3 – Delaware votes not to secede from the United States, Union. ** January 9 – Mississippi in the American Civil War, Mississippi becomes the second state to secede from the Union. ** January 10 – Florida in the American Civil War, Florida secedes from the Union. ** January 11 – Alabama in the American Civil War, Alabama secedes from the Union. ** January 12 – Major Robert Anderson (Union officer), Robert Anderson sends dispatches to Was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tammann Commemorative Medal
The Tammann Commemorative Medal is awarded once a year and was established in remembrance of Gustav Heinrich Johann Apollon Tammann. It honors members of the Deutsche Gesellschaft für Materialkunde, who have made outstanding contributions to the field of materials research. Awardees * 1973 Heinrich Wollenberger * 1974 Hans Hillmann * 1975 Manfred Wilkens * 1976 Otmar Vöhringer * 1977 Werner Pepperhoff * 1978 Heinrich Mecking * 1979 Theodor Hehenkamp * 1980 Ulrich Heubner * 1981 Helmut Holleck * 1982 Friedrich Pfeifer * 1983 Sigfried Steeb * 1984 Christian Herzig * 1986 Rudolf Akeret * 1988 Florian Schubert * 1989 Hans Paul Hougardy * 1990 Herbert Stephan * 1991 Georg Grathwohl * 1992 Ernst-Theo Henig * 1993 Wolfgang Gust * 1994 Gerhard Inden * 1995 Gerhard Sauthoff * 1996 Hans Jürgen Grabke * 1997 Günter Lange * 1998 Hans-Georg Sockel * 1999 Fritz Appel * 2000 Gerhard K. Wolf * 2001 Hans-Eckhardt Schaefer * 2002 Dmitri Molodov * 2004 Hermann Riedel * 2005 Gunther Eg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
X-ray Diffraction
X-ray diffraction is a generic term for phenomena associated with changes in the direction of X-ray beams due to interactions with the electrons around atoms. It occurs due to elastic scattering, when there is no change in the energy of the waves. The resulting map of the directions of the X-rays far from the sample is called a diffraction pattern. It is different from X-ray crystallography which exploits X-ray diffraction to determine the arrangement of atoms in materials, and also has other components such as ways to map from experimental diffraction measurements to the positions of atoms. This article provides an overview of X-ray diffraction, starting with the early #History, history of x-rays and the discovery that they have the right spacings to be diffracted by crystals. In many cases these diffraction patterns can be #Introduction to x-ray diffraction theory, Interpreted using a single scattering or kinematical theory with conservation of energy (#Ewald's sphere, wave vecto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vogel–Fulcher–Tammann Equation
The Vogel–Fulcher–Tammann equation, also known as Vogel–Fulcher–Tammann–Hesse equation or Vogel–Fulcher equation (abbreviated: VFT equation), is used to describe the viscosity of liquids as a function of temperature, and especially its strongly temperature dependent variation in the supercooled regime, upon approaching the glass transition. In this regime the viscosity of certain liquids can increase by up to 13 orders of magnitude within a relatively narrow temperature interval. The VFT equation reads as follows: :\eta = \eta_0 \cdot e^ where \eta_0 and B, are empirical material-dependent parameters, and T_\mathrm is also an empirical fitting parameter, and typically lies about 50 °C below the glass transition temperature. These three parameters are normally used as adjustable parameters to fit the VFT equation to experimental data of specific systems. The VFT equation is named after Hans Vogel, Gordon Scott Fulcher (1884–1971) and Gustav Tammann Gust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phases Of Ice
Variations in pressure and temperature give rise to different phases of ice, which have varying properties and molecular geometries. Currently, twenty-one phases, including both crystalline and Amorphous solid, amorphous ices have been observed. In modern history, phases have been discovered through scientific research with various techniques including pressurization, force application, nucleation agents, and others. On Earth, most ice is found in the hexagonal Ice Ih phase. Less common phases may be found in the atmosphere and underground due to more extreme pressures and temperatures. Some phases are manufactured by humans for nano scale uses due to their properties. In space, amorphous ice is the most common form as confirmed by observation. Thus, it is theorized to be the most common phase in the universe. Various other phases could be found naturally in astronomical objects. Theory Most liquids under increased pressure freeze at ''higher'' temperatures because the pressu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Göttingen University
Göttingen (, ; ; ) is a college town, university city in Lower Saxony, central Germany, the Capital (political), capital of Göttingen (district), the eponymous district. The River Leine runs through it. According to the 2022 German census, the population of Göttingen was 124,548. Overview The origins of Göttingen lay in a village called ''Gutingi, ''first mentioned in a document in 953 AD. The city was founded northwest of this village, between 1150 and 1200 AD, and adopted its name. In Middle Ages, medieval times the city was a member of the Hanseatic League and hence a wealthy town. Today, Göttingen is famous for its old university (''Georgia Augusta'', or University of Göttingen, "Georg-August-Universität"), which was founded in 1734 (first classes in 1737) and became the most visited university of Europe. In 1837, seven professors protested against the absolute sovereignty of the House of Hanover, kings of Kingdom of Hanover, Hanover; they lost their positions, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
