|
Werner Osenberg
Werner Oskar Ewald Osenberg (April 26, 1900, Zeitz–December 14, 1974 Renningen) was a German materials scientist, organizer of German armaments research and armaments developer during the Second World War. Among other things, Osenberg researched the use of ceramics as a cutting tool material and was given a chair at the Technische Hochschule Hannover in 1938. During the Second World War he was head of the planning office in the Reichsforschungsrat (Reich Research Council). Using his central database, he was able to bring 5,000 scientists and technicians back from the war front. At his institute in Lindau in Lower Saxony, he also carried out armaments research. In 1945 he was brought to the United States. His research database formed the basis for the selection of German scientists as part of Operation Overcast by the United States. Education and early career Osenberg received his high school diploma in the spring of 1918. He was then drafted into the navy and attended a course ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeitz
Zeitz (; , ) is a town in the Burgenlandkreis district, in Saxony-Anhalt, Germany. It is situated on the river White Elster, in the triangle of the federal states Saxony-Anhalt, Thuringia, and Saxony. History First a Slavic pagan settlement later Christianized, Zeitz was first recorded under the Medieval Latin name ''Cici'' in the Synod of Ravenna in 967. Between 965 and 982, it was the chief fortress of the March of Zeitz. Zeitz was a bishop's residence between 968 and 1028, when it was moved to Naumburg. Beginning at the end of the 13th century, the bishops again resided in their castle at Zeitz. The Herrmannsschacht (built in 1889) is one of the oldest brown coal brickette factories in the world. The city was captured by Swedish troops during the Thirty Years' War and was given to Electorate of Saxony in 1644. It was the centre of Saxe-Zeitz between 1657 and 1718, before returning to the Electorate (which became the Kingdom of Saxony in 1806). In 1815, it was gi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oberkommando Der Marine
The (; abbreviated OKM) was the high command and the highest administrative and command authority of the ''Kriegsmarine'', a branch of the ''Wehrmacht''. It was officially formed from the ''Marineleitung'' ("Naval Command") of the ''Reichswehr'' on 11 January 1936. In 1937 it was combined with the new '' Seekriegsleitung'' (SKL). There were two re-organisations, in November 1939 and May 1944. It was part of the . Organization The OKM was broadly divided into six sections: * At the top was the ''Oberbefehlshaber der Marine'' (OBdM) – the Commander-in-Chief and his staff, with responsibility for liaison with the OKW, and including planning, technical, engineering, medical, economic, research, propaganda and personnel departments. * The '' Seekriegsleitung'' (SKL) ("Naval Warfare Command") was formed on 1 April 1937. Originally closely linked with both the OBdM and the ''Marinekommandoamt'', with the Commander-in-Chief (OBdM) also the Chief of the SKL, and the Chief of the ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1974 Deaths
Major events in 1974 include the aftermath of the 1973 oil crisis and the resignation of President of the United States, United States President Richard Nixon following the Watergate scandal. In the Middle East, the aftermath of the 1973 Yom Kippur War determined politics; following List of Prime Ministers of Israel, Israeli Prime Minister Golda Meir's resignation in response to high Israeli casualties, she was succeeded by Yitzhak Rabin. In Europe, the Turkish invasion of Cyprus, invasion and occupation of northern Cyprus by Turkey, Turkish troops initiated the Cyprus dispute, the Carnation Revolution took place in Portugal, the Greek junta's collapse paves the way for the establishment of a Metapolitefsi, parliamentary republic and Chancellor of Germany, Chancellor of West Germany Willy Brandt resigned following an Guillaume affair, espionage scandal surrounding his secretary Günter Guillaume. In sports, the year was primarily dominated by the 1974 FIFA World Cup, FIFA World ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1900 Births
As of March 1 ( O.S. February 17), when the Julian calendar acknowledged a leap day and the Gregorian calendar did not, the Julian calendar fell one day further behind, bringing the difference to 13 days until February 28 ( O.S. February 15), 2100. Summary Political and military The year 1900 was the end of the 19th century and the beginning of the 20th century. Two days into the new year, the U.S. Secretary of State John Hay announced the Open Door Policy regarding China, advocating for equal access for all nations to the Chinese market. The Galveston hurricane would become the deadliest natural disaster in United States history, killing between 6,000 and 12,000 people, mostly in and near Galveston, Texas, as well as leaving 10,000 people homeless, destroying 7,000 buildings of all kinds in Galveston. As of 2025, it remains the fourth deadliest Atlantic hurricane on record. An ongoing Boxer Rebellion in China escalates with multiple attacks by the Boxers on Chines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerodynamics Research Institute
The ''Aerodynamische Versuchsanstalt'' (AVA) in Göttingen was one of the four predecessor organizations of the 1969 founded "German Research and Experimental Institute for Aerospace", which in 1997 was renamed German Aerospace Center (DLR). History The AVA was created in 1919 from the 1907 Göttingen by Ludwig Prandtl founded "Modellversuchsanstalt für Aerodynamik der Motorluftschiff-Studiengesellschaft". In its founding years, it was still concerned with the development of the "best" form of airship. In 1908, the first wind tunnel was built in Göttingen for tests on models for aviation. In 1915, founded in 1911 Kaiser Wilhelm Society (KWG) and under the direction of Ludwig Prandtl the "Modellversuchsanstalt aerodynamics" was founded in 1919 as the "Aerodynamic Research Institute of the Kaiser Wilhelm Society" (AVA) was transferred to the KWG and converted in 1925 into the " Kaiser Wilhelm Institute for Flow Research linked to the Aerodynamic Research Institute". Ludwig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honeycomb
A honeycomb is a mass of Triangular prismatic honeycomb#Hexagonal prismatic honeycomb, hexagonal prismatic cells built from beeswax by honey bees in their beehive, nests to contain their brood (eggs, larvae, and pupae) and stores of honey and pollen. beekeeping, Beekeepers may remove the entire honeycomb to harvest honey. Honey bees consume about of honey to secrete of wax, and so beekeepers may return the wax to the hive after harvesting the honey to improve honey outputs. The structure of the comb may be left basically intact when honey is extracted from it by uncapping and spinning in a centrifugal honey extractor. If the honeycomb is too worn out, the wax can be reused in a number of ways, including making sheets of comb Wax foundation, foundation with a hexagonal pattern. Such foundation sheets allow the bees to build the comb with less effort, and the hexagonal pattern of Worker bee, worker-sized cell bases discourages the bees from building the larger Drone (bee), drone c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shaped Charge
A shaped charge, commonly also hollow charge if shaped with a cavity, is an explosive charge shaped to focus the effect of the explosive's energy. Different types of shaped charges are used for various purposes such as cutting and forming metal, initiating nuclear weapons, penetrating armor, or perforating wells in the oil and gas industry. A typical modern shaped charge, with a metal liner on the charge cavity, can penetrate armor steel to a depth of seven or more times the diameter of the charge (charge diameters, CD), though depths of 10 CD and above have been achieved. Contrary to a misconception, possibly resulting from the acronym ''HEAT'' (high-explosive anti-tank), the shaped charge does not depend in any way on heating or melting for its effectiveness; that is, the jet from a shaped charge does not melt its way through armor, as its effect is purely kinetic in nature—however the process creates significant heat and often has a significant secondary incendiary ef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Misnay–Schardin Effect
The Misnay–Schardin effect, or platter effect, is a characteristic of the detonation of a broad sheet of explosive. Description Explosive blasts expand directly away from, and perpendicular to, the surface of an explosive. Unlike the blast from a rounded explosive charge, which expands in all directions, the blast produced by an explosive sheet expands primarily perpendicular to its plane, in both directions. However, if one side is backed by a heavy or fixed mass, most of the blast (i.e. most of the rapidly expanding gas and its kinetic energy) will be reflected in the direction away from the mass. Uses The Misnay–Schardin effect was studied and experimented with by explosive experts József Misnay (sometimes spelled Misznay incorrectly), a Hungary, Hungarian, and Hubert Schardin, a Germany, German, who initially sought to develop a more effective antitank mine for Nazi Germany. Some sources claim that World War II ended before their design became usable, but they and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bundesarchiv (Deutschland)
The German Federal Archives or Bundesarchiv (BArch) (, lit. "Federal Archive") are the national archives of Germany. They were established at the current location in Koblenz in 1952. They are subordinated to the Federal Commissioner for Culture and the Media (Claudia Roth since 2021) under the German Chancellery, and before 1998, to the Federal Ministry of the Interior. On 6 December 2008, the Archives donated 100,000 photos to the public, by making them accessible via Wikimedia Commons. History The federal archive for institutions and authorities in Germany, the first precursor to the present-day Federal Archives, was established in Potsdam, Brandenburg in 1919, a later date than in other European countries. This national archive documented German government dating from the founding of the North German Confederation in 1867. It also included material from the older German Confederation and the Imperial Chamber Court. The oldest documents in this collection dated back to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allies Of World War II
The Allies, formally referred to as the United Nations from 1942, were an international Coalition#Military, military coalition formed during World War II (1939–1945) to oppose the Axis powers. Its principal members were the "Four Policemen, Big Four" – the United Kingdom, United States, Soviet Union, and Republic of China (1912–1949), China. Membership in the Allies varied during the course of the war. When the conflict broke out on 1 September 1939, the Allied coalition consisted of the United Kingdom, French Third Republic, France, and Second Polish Republic, Poland, as well as their respective Dependent territory, dependencies, such as British Raj, British India. They were joined by the independent dominions of the British Commonwealth: Canada, Australia, Dominion of New Zealand, New Zealand and Union of South Africa, South Africa. Consequently, the initial alliance resembled Allies of World War I, that of the First World War. As Axis forces began German invasion of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dahlem (Berlin)
Dahlem ( or ) is a locality of the Steglitz-Zehlendorf borough in southwestern Berlin. Until Berlin's 2001 administrative reform it was a part of the former borough of Zehlendorf. It is located between the mansion settlements of Grunewald and Lichterfelde West. Dahlem is one of the most affluent parts of the city and a center for academic research. It is home to the Freie Universität Berlin, with its architecturally significant Philological Library ''("The Brain")''. Several other research institutions and museums, as well as parts of the Grunewald forest with its renaissance hunting lodge, are located in Dahlem. The U3 line of the Berlin U-Bahn system connects Dahlem to central Berlin. History The first written account of Dahlem dates to the year 1275. The history of the village is connected to the Dahlem Demesne (''Domäne Dahlem'') first mentioned in 1450. Its estates were sold to the state of Prussia in 1841 and developed by dividing it into lots for building v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bombing Of Hanover In World War II
The aerial bombings of Hanover are a series of eighty-eight air raids by Royal Air Force (RAF) Bomber Command and the United States Army Air Forces (USAAF) on the German city of Hanover during World War II. Collectively these air raids killed 6,782 persons, predominantly civilian residents. Around 1,000 aerial mines, 34,000 high explosive bombs, 900,000 incendiary bombs and 50,000 fire bombs were dropped. The most destructive and deadly air raid on Hanover was conducted by the RAF on the night beginning 8 October 1943, killing 1,245 persons, and is an example of carpet bombing of suburban and residential civilian targets laid out in the Area Bombing Directive of 14 February 1942. At the end of the war, 90% of the city centre was destroyed, with 52% of buildings heavily damaged or completely destroyed. A total of of rubble had to be removed. Of the 147,222 dwellings recorded at the end of 1939, 51.2% were heavily damaged or destroyed, 43.6% lightly or moderately damaged a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
