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B1a (other)
b1a may refer to: * Rockwell B-1A Lancer, U.S. USAF bomber aircraft * GSR Class B1a, a steam locomotive class * B1A section, a WWII counterespionage unit in the Double-Cross System The Double-Cross System or XX System was a World War II counter-espionage and deception operation of the British Security Service ( MI5). Nazi agents in Britain – real and false – were captured, turned themselves in or simply announced themse ... (XX System) * B1a cells, a type of B1 cell * B1A postal code, see List of postal codes of Canada: B See also * BA1 (other) * BA (other) {{dab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rockwell B-1A Lancer
The Rockwell B-1 Lancer is a supersonic variable-sweep wing, heavy bomber used by the United States Air Force. It has been nicknamed the "Bone" (from "B-One"). , it is one of the United States Air Force's three strategic bombers, along with the B-2 Spirit and the B-52 Stratofortress. It is a heavy bomber with up to a 75,000-pound (34,000 kg) of payload. The B-1 was first envisioned in the 1960s as a bomber that would combine the Mach 2 speed of the B-58 Hustler with the range and payload of the B-52, ultimately replacing both. After a long series of studies, North American Rockwell (subsequently renamed Rockwell International, B-1 division later acquired by Boeing) won the design contest for what emerged as the B-1A. Prototypes of this version could fly Mach number, Mach 2.2 at high altitude and long distances and at Mach 0.85 at very low altitudes. The program was canceled in 1977 due to its high cost, the introduction of the AGM-86 ALCM, AGM-86 cruise missile that flew t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GSR Class B1a
The Great Southern Railways Class 800 steam locomotives were built principally for express passenger work on the Dublin to Cork main line of that company. These locomotives were designed under the supervision of E. C. Bredin with his Chief Draughtsman, H. J. A. Beaumont, preparing the drawings. They were the largest and most powerful engines ever to run in Ireland by quite a large margin, and the only three express passenger locomotives to be built in an independent Ireland. Design The engines had three cylinders and boiler pressure. The nominal tractive effort was , which corresponded with Great British main-line power. Further, it was the only design which exploited the full extent of the extra width afforded by the gauge. Originally four or five were to be built, named ''Maeḋḃ'', ''Maċa'', ''Táilte'', ''Gráinne'', and ''Deirdre'', but only three were eventually produced - 800 ''Maeḋḃ'' in 1939, with ''Maċa'' (801) and ''Táilte'' (802) in 1940, along with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double-Cross System
The Double-Cross System or XX System was a World War II counter-espionage and deception operation of the British Security Service ( MI5). Nazi agents in Britain – real and false – were captured, turned themselves in or simply announced themselves, and were then used by the British to broadcast mainly disinformation to their Nazi controllers. Its operations were overseen by the Twenty Committee under the chairmanship of John Cecil Masterman; the name of the committee comes from the number 20 in Roman numerals: "XX" (i.e. a double cross). The policy of MI5 during the war was initially to use the system for counter-espionage. It was only later that its potential for deception purposes was realised. Of the agents from the German intelligence services, ''Abwehr'' and '' Sicherheitsdienst'' (SD), while many who reached British shores turned themselves in to the authorities, others were apprehended after they made elementary mistakes during their operations. In addition, some were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
B1 Cell
B1 cells are a sub-class of B cell lymphocytes that are involved in the humoral immune response. They are not part of the adaptive immune system, as they have no memory, but otherwise, B1 cells perform many of the same roles as other B cells: making antibodies against antigens and acting as antigen-presenting cells. These B1 cells are commonly found in peripheral sites, but less commonly found in the blood. These cells are involved in antibody response during an infection or vaccination. There are two types of B1 cells subsets, B1a cells and B1b cells. B1b cells have been shown to be capable of memory responses. B1b cells also can recognize protective antigens in bacteria, which is unique because they are targeting something internal. Origin B1 cells are first produced in the fetus and most B1 cells undergo self-renewal in the periphery, unlike conventional B cells ( B2 cells) that are produced after birth and replaced in the bone marrow. Types Human B1 cells have been foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BA1 (other)
BA1 may refer to: * A postcode district in the BA postcode area * A flight number associated with British Airways' Concorde service, later used for the BA Club World London City service * Band Aid (band) Band Aid is a charity supergroup featuring mainly British and Irish musicians and recording artists. It was founded in 1984 by Bob Geldof and Midge Ure to raise money for anti-famine efforts in Ethiopia by releasing the song " Do They Kno ... * Lineage BA.1, a variant of the Omicron strain of SARS-CoV-2 that causes COVID-19 See also * BA (other) * b1a (other) {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
