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AVA Radio Company
The AVA Radio Company (Polish: ''Wytwórnia Radiotechniczna AVA'') was a Polish electronics firm founded in 1929 in Warsaw, Poland. AVA designed and built radio equipment for the Polish General Staff's Cipher Bureau, which was responsible for the radio communications of the General Staff's ''Oddział II'' (Section II, the General Staff's intelligence section). After the Cipher Bureau's mathematician-cryptologist Marian Rejewski in late December 1932 deduced the wiring in the German military Enigma rotor cipher machine, AVA built Enigma "doubles" as well as all the electro-mechanical equipment designed at the Cipher Bureau to expedite decryption of Enigma ciphers. History AVA's four directors were Edward Fokczyński, Antoni Palluth, Ludomir Danilewicz, and his younger brother Leonard Danilewicz. The company took its name from the combined radio callsigns of the Danilewicz brothers (''TPAV'') and Palluth (''TPVA''). When the company was being formed in 1929, the Danilewi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonard Danilewicz
Leonard Stanisław Danilewicz was a Polish engineer and, for some ten years before the outbreak of World War II, one of the four directors of the AVA Radio Company in Warsaw, Poland. Cipher Bureau work AVA designed and built radio equipment for the Polish General Staff's Cipher Bureau, which was responsible for the radio communications of the General Staff's ''Oddział II'' (Section II, the General Staff's intelligence section). Beginning in 1933, after the Cipher Bureau's mathematician-cryptologist Marian Rejewski reconstructed the German military Enigma rotor cipher machine, AVA built Enigma "doubles" as well as all the electro-mechanical equipment subsequently designed at the Cipher Bureau to expedite routine breaking and reading of Enigma ciphers. AVA's other directors were Edward Fokczyński, Antoni Palluth, and Leonard Danilewicz's elder brother, Ludomir Danilewicz. The company took its name from the combined radio callsigns of the Danilewicz brothers (''TPAV'') and Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allies In World War II
The Allies, formally referred to as the United Nations from 1942, were an international military coalition formed during the Second World War (1939–1945) to oppose the Axis powers, led by Nazi Germany, Imperial Japan, and Fascist Italy. Its principal members by 1941 were the United Kingdom, United States, Soviet Union, and 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, France, and Poland, as well as their respective dependencies, such as British India. They were soon joined by the independent dominions of the British Commonwealth: Canada, Australia, New Zealand and South Africa. Consequently, the initial alliance resembled that of the First World War. As Axis forces began invading northern Europe and the Balkans, the Allies added the Netherlands, Belgium, Norway, Greece, and Yugoslavia. The Soviet Union, which initially had a nonaggression pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cipher
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption—a series of well-defined steps that can be followed as a procedure. An alternative, less common term is ''encipherment''. To encipher or encode is to convert information into cipher or code. In common parlance, "cipher" is synonymous with "code", as they are both a set of steps that encrypt a message; however, the concepts are distinct in cryptography, especially classical cryptography. Codes generally substitute different length strings of characters in the output, while ciphers generally substitute the same number of characters as are input. There are exceptions and some cipher systems may use slightly more, or fewer, characters when output versus the number that were input. Codes operated by substituting according to a large codebook which linked a random string of characters or numbers to a word or phrase. For example, "UQJHSE" could be the code for "Proceed to the following ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cost-plus Contract
A cost-plus contract, also termed a cost plus contract, is a contract such that a contractor is paid for all of its allowed expenses, ''plus'' additional payment to allow for a profit.Cost-Plus Contracts Cost-reimbursement contracts contrast with , in which the contractor is paid a negotiated amount regardless of incurred expenses. History [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioastronomy
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The first detection of radio waves from an astronomical object was in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way. Subsequent observations have identified a number of different sources of radio emission. These include stars and galaxies, as well as entirely new classes of objects, such as radio galaxies, quasars, pulsars, and masers. The discovery of the cosmic microwave background radiation, regarded as evidence for the Big Bang theory, was made through radio astronomy. Radio astronomy is conducted using large radio antennas referred to as radio telescopes, that are either used singularly, or with multiple linked telescopes utilizing the techniques of radio interferometry and aperture synthesis. The use of interferometry allows radio astronomy to achieve high angular resolution, as the resolving power of an interferometer is set by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mokotów
Mokotów , is a ''dzielnica'' (borough, district) of Warsaw, the capital of Poland. Mokotów is densely populated, and is a seat to many foreign embassies and companies. Only a small part of the district is lightly industrialised (''Służewiec Przemysłowy''), while the majority is full of parks and green areas (Mokotów Field). Although the area has been populated at least since the early Middle Ages, it was not until early 1916 when Mokotów was incorporated into Warsaw. The name of the area, first appearing as the village of Mokotowo in documents from the year 1367, has unclear origins. It is hypothesised to have come from the name of a German owner of the village, who called himself Mokoto or Mokot, however no exact reference to such an individual can be found in the historical records. Most of the area was urbanised and redeveloped throughout the 1930s in the style of modernism. The majority of the buildings survived World War II, making it one of the few well-preserved pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saxon Palace
The Saxons ( la, Saxones, german: Sachsen, ang, Seaxan, osx, Sahson, nds, Sassen, nl, Saksen) were a group of Germanic * * * * peoples whose name was given in the early Middle Ages to a large country (Old Saxony, la, Saxonia) near the North Sea coast of northern Germania, in what is now Germany. In the late Roman Empire, the name was used to refer to Germanic coastal raiders, and as a name similar to the later "Viking". Their origins are believed to be in or near the German North Sea coast where they appear later, in Carolingian times. In Merovingian times, continental Saxons had been associated with the activity and settlements on the coast of what later became Normandy. Their precise origins are uncertain, and they are sometimes described as fighting inland, coming into conflict with the Franks and Thuringians. There is possibly a single classical reference to a smaller homeland of an early Saxon tribe, but its interpretation is disputed. According to this proposal, the S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maksymilian Ciężki
Maksymilian Ciężki (; Samter, Province of Posen (now Szamotuły, Poland), 24 November 1898 – 9 November 1951 in London, England) was the head of the Polish Cipher Bureau's German section (''BS–4'') in the 1930s, during which time—from December 1932—the Bureau decrypted German Enigma messages. During the German invasion of Poland in September 1939, Ciężki escaped to France to continue work on breaking Enigma ciphers. In 1943 he was captured by the Germans and interned in an S.S. concentration camp. Career In the 1930s, Ciężki, as an army captain, was chief of the Polish General Staff Cipher Bureau's German section ('' Biuro Szyfrów-4'', abbreviated ''BS-4''). This section "broke" ( decrypted) German Enigma machine ciphers. Ciężki was also deputy to the Cipher Bureau's chief, Major (later, Lt. Col.) Gwido Langer, and in addition supervised the radio-intercept stations at Starogard in the Polish Corridor, at Poznań in western Poland, and at Krz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New World Street
New is an adjective referring to something recently made, discovered, or created. New or NEW may refer to: Music * New, singer of K-pop group The Boyz Albums and EPs * ''New'' (album), by Paul McCartney, 2013 * ''New'' (EP), by Regurgitator, 1995 Songs * "New" (Daya song), 2017 * "New" (Paul McCartney song), 2013 * "New" (No Doubt song), 1999 *"new", by Loona from '' Yves'', 2017 *"The New", by Interpol from ''Turn On the Bright Lights'', 2002 Acronyms * Net economic welfare, a proposed macroeconomic indicator * Net explosive weight, also known as net explosive quantity * Network of enlightened Women, a conservative university women's organization * Next Entertainment World, a South Korean film distribution company Identification codes * Nepal Bhasa language ISO 639 language code * New Century Financial Corporation (NYSE stock abbreviation) * Northeast Wrestling, a professional wrestling promotion in the northeastern United States Transport * New Orleans Lakefro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warsaw Polytechnic
The Warsaw University of Technology ( pl, Politechnika Warszawska, lit=Varsovian Polytechnic) is one of the leading institutes of technology in Poland and one of the largest in Central Europe. It employs 2,453 teaching faculty, with 357 professors (including 145 titular professors). The student body numbers 36,156 (as of 2011), mostly full-time. There are 19 faculties (divisions) covering almost all fields of science and technology. They are in Warsaw, except for one in Płock. The Warsaw University of Technology has about 5,000 graduates per year. According to the 2008 ''Rzeczpospolita'' newspaper survey, engineers govern Polish companies. Warsaw Tech alums make up the highest percentage of Polish managers and executives. Every ninth president among the top 500 corporations in Poland is a graduate of the Warsaw University of Technology. Professor Kurnik, the rector, explained that the school provides a solid basis for the performance of managers by equipping its students with an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
