|
K-37 Cipher Machine
K37 may refer to: * K-37 cipher machine; see Otto Buggisch * , a corvette of the Royal Navy * Junkers K 37, a German mail plane * Piano Concerto No. 1 (Mozart), by Wolfgang Amadeus Mozart * Potassium-37, an isotope of potassium * Rio Grande class K-37 The Denver and Rio Grande Western K-37 is a class of "Mikado" type narrow-gauge steam locomotives built for the Denver and Rio Grande Western Railroad. They were all new steam locomotives rebuilt in the D&RGW Burnham Shops as a cheaper option to ..., an American steam locomotive * Tōfutsu Station, in Hokkaido, Japan {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
K-37 Cipher Machine
K37 may refer to: * K-37 cipher machine; see Otto Buggisch * , a corvette of the Royal Navy * Junkers K 37, a German mail plane * Piano Concerto No. 1 (Mozart), by Wolfgang Amadeus Mozart * Potassium-37, an isotope of potassium * Rio Grande class K-37 The Denver and Rio Grande Western K-37 is a class of "Mikado" type narrow-gauge steam locomotives built for the Denver and Rio Grande Western Railroad. They were all new steam locomotives rebuilt in the D&RGW Burnham Shops as a cheaper option to ..., an American steam locomotive * Tōfutsu Station, in Hokkaido, Japan {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otto Buggisch
Otto Buggisch (28 June 1910 – 15 September 1991) was a German mathematician who, during World War II, was a cryptanalyst working in the cipher bureau, the Cipher Department of the High Command of the Wehrmacht (OKW/Chi) responsible for deciphering of the opposing forces Communications. He also dealt with the security control of own key procedures. Through research and revelations exposed by two Polish officers, late in the war, he recognized the true cryptographic weaknesses of the Enigma rotor cipher, key machine used by the German armed forces to encrypt their secret communications, in World War II. History Buggisch graduated from the Ludwig-Georgs Gymnasium (LGG) in Darmstadt in 1928. He studied pure mathematics and physics and the subsidiary subject applied mathematics at the Technische Universität Darmstadt. In 1938, Buggisch was promoted to Dr. rer. nat. with a mathematical dissertation titled ''On the Rarity of Equations with Affect'' (German: Über die Seltenheit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Junkers K 37
The Junkers S 36 was a twin-engine mail plane developed in Germany in the late 1920s that was further developed in Sweden as a multi-role military aircraft, albeit unsuccessfully, under the designation K 37. The design itself was a low-wing cantilever monoplane of largely conventional design, featuring twin tails and fixed, tailwheel undercarriage. Construction was metal throughout and skinned, in typical Junkers fashion, with corrugated duralumin. The engines were mounted in nacelles on the wings, and the crew was accommodated in three open cockpits, including one in the very nose of the aircraft. Design and development This design lent itself readily to military applications, and the open cockpit in the nose offered an ideal position for a crewman to act as an observer, bombardier and/or nose gunner. The ''S 36'' prototype was flown to Sweden, where it was militarised by Junkers subsidiary AB Flygindustri at Limhamn. Proposed as a fighter or reconnaissance-bomber, the K 37 cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piano Concerto No
The piano is a stringed keyboard instrument in which the strings are struck by wooden hammers that are coated with a softer material (modern hammers are covered with dense wool felt; some early pianos used leather). It is played using a keyboard, which is a row of keys (small levers) that the performer presses down or strikes with the fingers and thumbs of both hands to cause the hammers to strike the strings. It was invented in Italy by Bartolomeo Cristofori around the year 1700. Description The word "piano" is a shortened form of ''pianoforte'', the Italian term for the early 1700s versions of the instrument, which in turn derives from ''clavicembalo col piano e forte'' (key cimbalom with quiet and loud)Pollens (1995, 238) and ''fortepiano''. The Italian musical terms ''piano'' and ''forte'' indicate "soft" and "loud" respectively, in this context referring to the variations in volume (i.e., loudness) produced in response to a pianist's touch or pressure on the keys: the grea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potassium-37
Potassium () has 26 known isotopes from to , with the exception of still-unknown , as well as an unconfirmed report of . Three of those isotopes occur naturally: the two stable forms (93.3%) and (6.7%), and a very long-lived radioisotope (0.012%) Naturally occurring radioactive decays with a half-life of 1.248×109 years. 89% of those decays are to stable by beta decay, whilst 11% are to by either electron capture or positron emission. has the longest known half life for any positron-emitter nuclide. The long half-life of this primordial radioisotope is caused by a highly spin-forbidden transition: has a nuclear spin of 4, while both of its decay daughters are even–even isotopes with spins of 0. occurs in natural potassium in sufficient quantity that large bags of potassium chloride commercial salt substitutes can be used as a radioactive source for classroom demonstrations. is the largest source of natural radioactivity in healthy animals and humans, greater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rio Grande Class K-37
The Denver and Rio Grande Western K-37 is a class of "Mikado" type narrow-gauge steam locomotives built for the Denver and Rio Grande Western Railroad. They were all new steam locomotives rebuilt in the D&RGW Burnham Shops as a cheaper option to new Baldwin K-36s but were in fact more expensive. Burnham Shops was assisted in the construction of the class by the Stearn-Rogers Manufacturing Company. The class recycled components from Baldwin Locomotive Works built Class 19 (later C-41) 2-8-0 locomotives used on the Rio Grande's standard gauge; re-using the boiler, tender and other components salvaged from the C-41's. The engine components; particularly the frames, valve gear, wheels and counter weights , were constructed new for the locomotive class. Design The locomotives are of outside-frame design, with the driving wheels placed between the two chassis frames which support the boiler, but with the cylinders, driving rods, counterweights and valve gear on the outside. This ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
