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O-1248
O1 or O-1 may refer to: Aircraft *O-1 Bird Dog, an observation aircraft manufactured by Cessna *O-1 Curtiss Falcon, an observation aircraft manufactured by the Curtiss Aircraft Company * O-1 Airship, an Italian manufactured semi-rigid airship operated by the US Navy Music * ''O1'' (Hiroyuki Sawano album), 2015 * ''O1'' (Son of Dave album), 2000 Military *O-1 or ''fenrik'', a second lieutenant rank in Norway * The pay grade for ensign and second lieutenant ranks in the U.S. uniformed services * USS ''O-1'' (SS-62), lead ship of the United States O class submarines * HNLMS ''O 1'', a 1905 Royal Netherlands Navy O class submarine Science and technology * O1 type star, a subclass of O-type star * O-1 tool steel, a type of oil-hardening tool steel * Haplogroup O1 (Y-DNA), a Y-DNA haplogroup * O1: an EEG electrode site according to the 10–20 system * O(1), time complexity expressed using Big O notation Other * O-1 visa, a variety of the U.S. O visa, allowing for temporary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O-1 Bird Dog
The Cessna L-19/O-1 Bird Dog is a liaison and observation aircraft. It was the first all-metal fixed-wing aircraft ordered for and by the United States Army following the Army Air Forces' separation from it in 1947. The Bird Dog had a lengthy career in the U.S. military, as well as in other countries. Design and development The U.S. Army was searching for an aircraft that could adjust artillery fire, as well as perform liaison duties, and preferably be constructed of all metal, as the fabric-covered liaison aircraft used during World War II (primarily Stinson and Piper products) had short service lives. After the specification for a two-seat liaison and observation monoplane was issued the Cessna Aircraft Company submitted the Cessna Model 305A, a development of the Cessna 170. The Cessna 305A was a single-engine, lightweight, strut-braced, high-wing monoplane with a tailwheel landing gear. The greatest difference from the Cessna 170 was that the 305A had only two seats, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haplogroup O1 (Y-DNA)
In human genetics, Haplogroup O-M119 is a Y-chromosome DNA haplogroup. Haplogroup O-M119 is a descendant branch of haplogroup O-F265 also known as O1a, one of two extant primary subclades of Haplogroup O-M175. The same clade previously has been labeled as O-MSY2.2.https://isogg.org/tree/ISOGG_HapgrpO.html: "MSY2.2 was removed from tree because not providing reliable results." Origins The Haplogroup O-M119 branch is believed to have evolved during the Late Pleistocene ( Upper Paleolithic) in China mainland. Paleolithic migrations suggest haplogroup O-M119 was part of a four-phase colonization model in which Paleolithic migrations of hunter-gatherers shaped the primary structure of current Y-Chromosome diversity of Maritime Southeast Asia. Approximately 5000 BCE, Haplogroup O-M119 coalesced at Sundaland and migrated northwards to as far as Taiwan, where O-M50 constitutes some 90% of the Aboriginal Y-DNA, being the main haplogroup that can be directly linked to the Austronesian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LNER Thompson Class O1
The London and North Eastern Railway (LNER) Thompson Class O1 was a class of 2-8-0 steam locomotive designed by Edward Thompson for freight work. None have survived to preservation. Construction Because of wartime restrictions on new-build locomotives, they were rebuilds of LNER Class O4 "ROD" 2-8-0s built before and during World War I, although most of the locomotive was replaced during this rebuild. The first LNER rebuild took place in February 1944, at Gorton Works and a total of 58 locomotives were rebuilt to class O1 in total, with the last being locomotive 63856 in October 1949 during the early British Railways era, after which the programme was halted. The main modification to the original GCR Robinson Class 8K 2-8-0 design was the incorporation of a standard LNER 100A boiler, Walschaerts valve gear The Walschaerts valve gear is a type of valve gear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgian railway engineer Egi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GNR Class O1
The Great Northern Railway (GNR) Class O1 was a class of two-cylinder 2-8-0 steam locomotive designed by Nigel Gresley for heavy freight work and built by the GNR between 1913 and 1919. History Gresley designed the O1 2-8-0 for the heavy coal trains on the mainline from Grantham to London, ordering five examples 1913, which were completed at Doncaster in 1914. A further fifteen were ordered in January 1916, but due to the First World War delays were incurred and construction was transferred to the North British Locomotive Company, who delivered the first ten in April 1918, followed by a further five in October and November 1919. The class was re-designated O3 by the London and North Eastern Railway The London and North Eastern Railway (LNER) was the second largest (after LMS) of the " Big Four" railway companies created by the Railways Act 1921 in Britain. It operated from 1 January 1923 until nationalisation on 1 January 1948. At th ... in 1944. British Railways ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orchestra ONE
An orchestra (; ) is a large instrumental ensemble typical of classical music, which combines instruments from different families. There are typically four main sections of instruments: * bowed string instruments, such as the violin, viola, cello, and double bass * woodwinds, such as the flute, oboe, clarinet, saxophone, and bassoon * Brass instruments, such as the horn, trumpet, trombone, cornet, and tuba * percussion instruments, such as the timpani, snare drum, bass drum, cymbals, triangle, tambourine, and mallet percussion instruments Other instruments such as the piano, harpsichord, and celesta may sometimes appear in a fifth keyboard section or may stand alone as soloist instruments, as may the concert harp and, for performances of some modern compositions, electronic instruments and guitars. A full-size Western orchestra may sometimes be called a or philharmonic orchestra (from Greek ''phil-'', "loving", and "harmony"). The actual number of musicians employed in a giv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Otoyol 1
Otoyol 1 ( en, Motorway 1), abbreviated as O-1 and locally referred to as Freeway 1 ( tr, 1. Çevreyolu), is a controlled access highway in Istanbul, Turkey. The O-1 serves as the inner freeway and is one of three freeways in the city, the others being the O-2, and O-7, as well as connecting the European and Asian parts of the city via the Bosphorus Bridge. It starts Osmaniye neighborhood in Bakırköy district on the European part, runs through the city over the Golden Horn and the Bosphorus, and terminates in Söğütlüçeşme neighborhood of Kadıköy district on the Asian part. Otoyol 1 is toll-free, however the Bosporus Bridge is a toll bridge in the eastward direction only, having its toll plaza at the Asian side. The O-1 is connected via three feeder highways to The Second Beltway. Exit list See also * List of highways in Turkey The three types of intercity roads in Turkey • Motorways are controlled-access highways that are officially ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O Visa
An O visa is a classification of non-immigrant temporary worker visa granted by the United States to an alien "who possesses extraordinary ability in the sciences, arts, education, business, or athletics, or who has a demonstrated record of extraordinary achievement in the motion picture or television industry and has been recognized nationally or internationally for those achievements", and to certain assistants and immediate family members of such aliens. According to United States Citizenship and Immigration Services, there are three types of O visas: * O-1A: individuals with an extraordinary ability in the sciences, education, business, or athletics (not including the arts, motion pictures or television industry) * O-1B: individuals with an extraordinary ability in the arts or extraordinary achievement in motion picture or television industry. * O-2: individuals who will accompany an O-1, artist or athlete, to assist in a specific event or performance. "For an O-1A, the O-2's a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Complexity
In computer science, the time complexity is the computational complexity that describes the amount of computer time it takes to run an algorithm. Time complexity is commonly estimated by counting the number of elementary operations performed by the algorithm, supposing that each elementary operation takes a fixed amount of time to perform. Thus, the amount of time taken and the number of elementary operations performed by the algorithm are taken to be related by a constant factor. Since an algorithm's running time may vary among different inputs of the same size, one commonly considers the worst-case time complexity, which is the maximum amount of time required for inputs of a given size. Less common, and usually specified explicitly, is the average-case complexity, which is the average of the time taken on inputs of a given size (this makes sense because there are only a finite number of possible inputs of a given size). In both cases, the time complexity is generally expresse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
10–20 System (EEG)
The 10–20 system or International 10–20 system is an internationally recognized method to describe and apply the location of scalp electrodes in the context of an EEG exam, polysomnograph sleep study, or voluntary lab research. This method was developed to maintain standardized testing methods ensuring that a subject's study outcomes (clinical or research) could be compiled, reproduced, and effectively analyzed and compared using the scientific method. The system is based on the relationship between the location of an electrode and the underlying area of the brain, specifically the cerebral cortex. During sleep and wake cycles, the brain produces different, objectively recognized and distinguishable electrical patterns, which can be detected by electrodes on the skin. (These patterns might vary, and can be affected by multiple extrinsic factors, i.e. age, prescription drugs, somatic diagnoses, hx of neurologic insults/injury/trauma, and substance abuse) The "10" and "20" ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O-1 Tool Steel
Tool steel is any of various carbon steels and alloy steels that are particularly well-suited to be made into tools and tooling, including cutting tools, dies, hand tools, knives, and others. Their suitability comes from their distinctive hardness, resistance to abrasion and deformation, and their ability to hold a cutting edge at elevated temperatures. As a result, tool steels are suited for use in the shaping of other materials, as for example in cutting, machining, stamping, or forging. With a carbon content between 0.5% and 1.5%, tool steels are manufactured under carefully controlled conditions to produce the required quality. The presence of carbides in their matrix plays the dominant role in the qualities of tool steel. The four major alloying elements that form carbides in tool steel are: tungsten, chromium, vanadium and molybdenum. The rate of dissolution of the different carbides into the austenite form of the iron determines the high-temperature performance of stee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtiss Falcon
The Curtiss Falcon was a family of military biplane aircraft built by the American aircraft manufacturer Curtiss Aeroplane and Motor Company during the 1920s. Most saw service as part of the United States Army Air Corps as observation aircraft with the designations O-1 and O-11, or as the attack aircraft designated the A-3 Falcon. United States Navy, U.S. Navy variants were used initially as fighter-bombers with the designation F8C Falcon, then as the first United States Marine Corps, U.S. Marine Corps dive bombers with the name Helldiver. Two later generations of Curtiss dive-bombers were also named Curtiss Helldiver (other), Helldiver. The type was introduced in 1925 and saw first-line service in the United States until 1934. Curtiss Falcons fought in the Constitutionalist Revolution of 1932 in Brazil, used by the forces of São Paulo. Design and development The Falcon XO-1 prototype was evaluated by the USAAC along with eleven other prototypes in 1924 and the Dougl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O-type Star
An O-type star is a hot, blue-white star of spectral type O in the Yerkes classification system employed by astronomers. They have temperatures in excess of 30,000 kelvin (K). Stars of this type have strong absorption lines of ionised helium, strong lines of other ionised elements, and hydrogen and neutral helium lines weaker than spectral type B. Stars of this type are very rare, but because they are very bright, they can be seen at great distances and four of the 90 brightest stars as seen from Earth are O type.Those four stars are Gamma Velorum, Alnitak (Zeta Orionis), Mintaka (Delta Orionis), and Zeta Puppis. Due to their high mass, O-type stars end their lives rather quickly in violent supernova explosions, resulting in black holes or neutron stars. Most of these stars are young massive main sequence, giant, or supergiant stars, but the central stars of planetary nebulae, old low-mass stars near the end of their lives, also usually have O spectra. O-type stars are typical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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