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AC1 (other)
AC1 may refer to: * AC1, a ranking grading within the Royal Air Force The Royal Air Force (RAF) is the Air force, air and space force of the United Kingdom, British Overseas Territories and Crown Dependencies. It was formed towards the end of the World War I, First World War on 1 April 1918, on the merger of t ... between 1919 and 1964 * AC1, a candidate phylum of bacteria * AC1, a complexity class in circuit complexity * AC1 Sentinel, an Australian cruiser tank * AC-1, an IEC Utilization Category * Action Comics #1, containing the first appearances of several superheroes * Atlantic Crossing 1, an optical submarine telecommunications cable system * ''Assassin's Creed'', the first game in the Assassin's Creed series {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircraftman
Aircraftman (AC) or aircraftwoman (ACW) was formerly the lowest rank in the British Royal Air Force (RAF) and is still in use by the air forces of several other Commonwealth countries. In RAF slang, aircraftmen were sometimes called "erks". Aircraftman ranked below leading aircraftman and has a NATO rank code of OR-1. For some time in the RAF it had been a training rank only and no airmen in productive service held the rank. Aircraftmen do not wear any rank insignia. The rank was renamed air recruit (AR) in the Royal Air Force in July 2022. History The rank was introduced to the RAF in January 1919, replacing the ranks of "air mechanic", "private" and "clerk" that had been introduced under Air Memorandum No. 1 in March 1918. There were three grades: leading aircraftman (LAC), aircraftman 1st class (AC1) and aircraftman 2nd class. A similar grading existed for junior ratings in the Royal Navy. The rank of senior aircraftman (SAC) was introduced on 1 January 1951. The lowest gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Air Force
The Royal Air Force (RAF) is the Air force, air and space force of the United Kingdom, British Overseas Territories and Crown Dependencies. It was formed towards the end of the World War I, First World War on 1 April 1918, on the merger of the Royal Flying Corps (RFC) and the Royal Naval Air Service (RNAS). Following the Allies of World War I, Allied victory over the Central Powers in 1918, the RAF emerged as the largest air force in the world at the time. Since its formation, the RAF has played History of the Royal Air Force, a significant role in Military history of the United Kingdom, British military history. In particular, during the Second World War, the RAF established Air supremacy, air superiority over Nazi Germany's Luftwaffe during the Battle of Britain, and led the Allied strategic bombing effort. The RAF's mission is to support the objectives of the British Ministry of Defence (United Kingdom), Ministry of Defence (MOD), which are to "provide the capabilities nee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacterial Phyla
Bacterial phyla constitute the major lineages of the domain Bacteria. While the exact definition of a bacterial phylum is debated, a popular definition is that a bacterial phylum is a monophyletic lineage of bacteria whose 16S rRNA genes share a pairwise sequence identity of ~75% or less with those of the members of other bacterial phyla. It has been estimated that ~1,300 bacterial phyla exist. As of May 2020, 41 bacterial phyla are formally accepted by the LPSN, 89 bacterial phyla are recognized on the Silva database, dozens more have been proposed, and hundreds likely remain to be discovered. As of 2017, approximately 72% of widely recognized bacterial phyla were candidate phyla (i.e. have no cultured representatives). The rank of phylum has been included in the rules of the International Code of Nomenclature of Prokaryotes, using the ending ''–ota'' for phylum names that must be based on the name of a genus as its nomenclatural type. List of bacterial phyla The fol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AC (complexity)
In circuit complexity, AC is a complexity class hierarchy. Each class, ACi, consists of the languages recognized by Boolean circuits with depth O(\log^i n) and a polynomial number of unlimited fan-in AND and OR gates. The name "AC" was chosen by analogy to NC, with the "A" in the name standing for "alternating" and referring both to the alternation between the AND and OR gates in the circuits and to alternating Turing machines. The smallest AC class is AC0, consisting of constant-depth unlimited fan-in circuits. The total hierarchy of AC classes is defined as \mbox = \bigcup_ \mbox^i Relation to NC The AC classes are related to NC, ACC, and TC classes. For each ''i'', we have, p. 437; , p. 118. :\mathsf^i \subseteq \mathsf^i \subseteq \mathsf^ \subseteq \mathsf^ \subseteq \mathsf^. As an immediate consequence of this, we have that NC = AC = ACC = TC. We have \mathsf^0 \subsetneq \mathsf^0 \subsetneq \mathsf^. Specifically, PARITY is in \mathsf^0 but not in \math ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sentinel Tank
The AC1 Sentinel was a cruiser tank designed in Australia in World War II in response to the war in Europe, and to the threat of Japan expanding the war to the Pacific or even a feared Japanese invasion of Australia. It was the first tank to be built with a hull cast as a single piece, and the only tank to be produced in quantity in Australia. The few Sentinels that were built never saw action as Australia's armoured divisions had been equipped by that time with British and American tanks. History When design work began in November 1940, the AC1 was originally intended to be a 2 pounder gun-equipped vehicle, a true Cruiser tank, with a weight of between 16 and 20 tonnes. Due to a lack of home grown experience in tank design, a mission was sent to the US to examine the M3 design and Colonel W.D. Watson MC, an artillery officer with many years of tank design experience was provided by the UK. He arrived in December 1940. Like the Canadian Ram, the Australian Cruiser was to be bas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utilization Categories
In electrical engineering utilization categories are defined by IEC standards and indicate the type of electrical load and duty cycle of the loads to ease selection of contactors and relays. Definition The utilization categories category for low-voltage switchgear defines the characteristic operating conditions for switchgear such as contactors, circuit-breakers, circuit-breaker-fuse units, contactor relays, etc. These devices are dimensioned for different electrical loads and for different operating conditions. The characteristic of the load to be switched or controlled determines the requirements for the switchgear and its correct selection for the intended application. In particular, the stress on the switching path caused by current and voltage during switching on and off is of enormous importance. For example, the switch-on and switch-off current at resistance load corresponds to the continuous operating current, while, for example, squirrel cage motors consumes multiple of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Action Comics 1
''Action Comics'' #1 (cover dated June 1938) is the first issue of the original run of the comic book/Comic anthology, magazine series ''Action Comics''. It features the first appearance of several comic-book heroes—most notably the Jerry Siegel and Joe Shuster creation, Superman—and sold for 10 cents (). It is widely considered to be both the beginning of the superhero genre and the most valuable comic book in the world. ''Action Comics'' ran for 904 numbered issues (plus additional out-of-sequence special issues) before it restarted its numbering in the fall of 2011. It returned to its original numbering with issue #957, published on June 8, 2016 (cover-dated August) and reached Action Comics 1000, its 1,000th issue in 2018. On August 24, 2014, a copy graded 9.0 by Comics Guaranty LLC, CGC was sold on eBay for $3,207,852 USD (); it was the first comic book to have sold for more than $3 million for a single original copy. Contents ''Action Comics'' #1 was an anthology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantic Crossing 1
Atlantic Crossing 1 (AC-1) is an optical submarine telecommunications cable system linking the United States and three European countries. It transports speech and data traffic between the U.S., the U.K., the Netherlands and Germany. It is one of several transatlantic communications cables. It was operated by American company Level 3 Communications and Irish company Tyco International, until their respective mergers in 2017 and 2016 with other companies. It has landing points in: # Brookhaven Cable Station, Shirley, New York, United States # Land's End Cable Station, Cornwall, England, United Kingdom # Westerland Cable Station, Schleswig-Holstein, Germany # KPN Telecom cable station, Beverwijk Beverwijk () is a municipality and a city in the Netherlands, in the province of North Holland. The town is located about northwest of Amsterdam in the Randstad metropolitan area, north of the North Sea Canal very close to the North Sea coast. A ..., Netherlands References Exter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
