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L4 (other)
L4 or L-4 may refer to : Transportation * SP&S Class L-4, an 1884 steam locomotives class * USS L-4 (SS-43), USS ''L-4'' (SS-43), a 1915 United States Navy L-class submarine * HMS L4, HMS ''L4'', a 1918 British L class submarine * Lawson L-4, a 1924 American unflown biplane airliner * Piper Cub (U.S. military designation: L-4), an aircraft * Straight-four engine, Inline-four engine (L4), a type of inline internal combustion four cylinder engine ** Liberty L-4, a World War I four-cylinder, water-cooled, inline, aero-engine * Lynx Aviation (IATA code) * L4 (New York City bus), a temporary bus route in New York City * L4, an S-Bahn line of the Léman Express in Switzerland and France * Parramatta Light Rail, also known as the L4, a light rail service in Parramatta, Sydney, Australia * Chaika L-4, a Russian twin-engined amphibious aircraft * Soviet submarine L-4 Science and technology * L4 microkernel family, a family of operating system kernels *L4, the transport layer in the OSI mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SP&S Class L-4
The Spokane, Portland and Seattle Railway (SP&S) class L-4 steam locomotives were originally used by the Astoria and Columbia River Railroad (AC&R). They became SP&S locomotives when the SP&S acquired the A&CR. Background The Astoria & Columbia River Railroad ran from Portland, Oregon, to Astoria, Oregon, along the south bank of the Columbia River. In 1896-97 several locomotives were obtained secondhand for the newly completed line. Among these locomotives were A&CR numbers 6 and 7. These locomotives would become the two members of Class L-4 when the SP&S bought out the A&CR in 1911. Numbering Upon the acquisition of the A&CR by the SP&S both locomotives were renumbered and placed into Class L-4. A&CR number 6 was renumbered SP&S number 53 on February 24, 1911. A&CR number 7 was renumbered SP&S number 54 on February 24, 1911. Disposition SP&S number 53 was sold to Warren CC on May 6, 1920. SP&S number 54 was dismantled in May 1924. References Rogers locom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OSI Model
The Open Systems Interconnection (OSI) model is a reference model developed by the International Organization for Standardization (ISO) that "provides a common basis for the coordination of standards development for the purpose of systems interconnection." In the OSI reference model, the components of a communication system are distinguished in seven abstraction layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. The model describes communications from the physical implementation of transmitting bits across a transmission medium to the highest-level representation of data of a distributed application. Each layer has well-defined functions and semantics and serves a class of functionality to the layer above it and is served by the layer below it. Established, well-known communication protocols are decomposed in software development into the model's hierarchy of function calls. The Internet protocol suite as defined in and is a model of net ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Level 4 (other) protection level
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Level 4 or Level Four or Level IV may refer to: Technology * Level 4, a level of automation in a self-driving car (see Autonomous car#Classification) *Level 4, the transport layer in the OSI model of computer communications Gradation *Level 4 Biosafety level * Level 4 trauma center Music * LVL IV album by Future Leaders of the World 2004 *Level 4 (Globe album) Other uses * Level 0 coronavirus restrictions, see COVID-19 pandemic in Scotland#Levels System * STANAG 4569 NATO AEP-55 STANAG 4569 is a NATO Standardization Agreement covering the standards for the "Protection Levels for Occupants of Logistic and Light Armored Vehicles". The standard covers strikes from kinetic energy, artillery and Improvised explosiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
L04 (other)
L04 may refer to: * Holtville Airport's FAA identifier * ATC code L04 Immunosuppressants, a subgroup of the Anatomical Therapeutic Chemical Classification System See also * L4 (other) {{Letter-NumberCombDisambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ISO/IEC 8859-4
ISO/IEC 8859-4:1998, ''Information technology — 8-bit single-byte coded graphic character sets — Part 4: Latin alphabet No. 4'', is part of the ISO/IEC 8859 series of ASCII-based standard character encodings, first edition published in 1988. It is informally referred to as Latin-4 or ''North European''. It was designed to cover Estonian, Latvian, Lithuanian, Greenlandic, and Sámi. It has been largely superseded by ISO/IEC 8859-10 and Unicode. Microsoft has assigned code page 28594 a.k.a. Windows-28594 to ISO-8859-4 in Windows. IBM has assigned code page 914 ( CCSID 914) to ISO 8859-4. ISO-8859-4 is the IANA preferred charset name for this standard when supplemented with the C0 and C1 control codes from ISO/IEC 6429. ISO-IR 205 (called Code page 58258 by FreeDOS) replaces the generic Currency Sign at 0xA4 with the Euro Sign. Codepage layout Differences from ISO-8859-1 ISO/IEC 8859-1:1998, ''Information technology—8-bit computing, 8-bit single-byte coded graphi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bren Light Machine Gun
The Bren gun (Brno-Enfield) was a series of light machine guns (LMG) made by the United Kingdom in the 1930s and used in various roles until 1992. While best known for its role as the British and Commonwealth forces' primary infantry LMG in World War II, it was also used in the Korean War and saw service throughout the latter half of the 20th century, including the 1982 Falklands War. Although fitted with a bipod, it could also be mounted on a tripod or be vehicle-mounted. The Bren gun was a licensed version of the Czechoslovak ZGB 33 light machine gun which, in turn, was a modified version of the ZB vz. 26, which British Army officials had tested during a firearms service competition in the 1930s. The designer was Václav Holek, a gun inventor and design engineer. The later Bren gun featured a distinctive top-mounted curved box magazine, conical flash hider, and quick change barrel. In the 1950s, many Bren guns were re-barrelled to accept the 7.62×51mm NATO cartridge and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caenorhabditis Elegans
''Caenorhabditis elegans'' () is a free-living transparent nematode about 1 mm in length that lives in temperate soil environments. It is the type species of its genus. The name is a Hybrid word, blend of the Greek ''caeno-'' (recent), ''rhabditis'' (rod-like) and Latin ''elegans'' (elegant). In 1900, Émile Maupas, Maupas initially named it ''Rhabditidae, Rhabditides elegans.'' Günther Osche, Osche placed it in the subgenus ''Caenorhabditis'' in 1952, and in 1955, Ellsworth Dougherty, Dougherty raised ''Caenorhabditis'' to the status of genus. ''C. elegans'' is an unsegmented pseudocoelomate and lacks respiratory or circulatory systems. Most of these nematodes are hermaphrodites and a few are males. Males have specialised tails for mating that include spicule (nematode), spicules. In 1963, Sydney Brenner proposed research into ''C. elegans,'' primarily in the area of neuronal development. In 1974, he began research into the molecular biology, molecular and developmental ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lumbar Vertebrae
The lumbar vertebrae are located between the thoracic vertebrae and pelvis. They form the lower part of the back in humans, and the tail end of the back in quadrupeds. In humans, there are five lumbar vertebrae. The term is used to describe the anatomy of humans and quadrupeds, such as horses, pigs, or cattle. These bones are found in particular cuts of meat, including tenderloin or sirloin steak. Human anatomy In human anatomy, the five vertebrae are between the rib cage and the pelvis. They are the largest segments of the vertebral column and are characterized by the absence of the foramen transversarium within the transverse process (since it is only found in the cervical region) and by the absence of facets on the sides of the body (as found only in the thoracic region). They are designated L1 to L5, starting at the top. The lumbar vertebrae help support the weight of the body, and permit movement. General characteristics The adjacent figure depicts the general cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribosomal Protein L4
60S ribosomal protein L4 is a protein that in humans is encoded by the ''RPL4'' gene. Ribosomes, the organelles that catalyze protein synthesis, consist of a small 40S subunit and a large 60S subunit. Together these subunits are composed of 4 RNA species and approximately 80 structurally distinct proteins. This gene encodes a ribosomal protein that is a component of the 60S subunit. The protein belongs to the L4E family of ribosomal proteins. It is located in the cytoplasm. As is typical for genes encoding ribosomal proteins, there are multiple processed pseudogene Pseudogenes are nonfunctional segments of DNA that resemble functional genes. Pseudogenes can be formed from both protein-coding genes and non-coding genes. In the case of protein-coding genes, most pseudogenes arise as superfluous copies of fun ...s of this gene dispersed through the genome. References Further reading * * * * * * * * * * * * * * * * Ribosomal proteins {{gene-15-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haplogroup L4 (mtDNA)
Haplogroup L4 is a human mitochondrial DNA (mtDNA) haplogroup. It is a small maternal clade primarily restricted to Africa. L4 is important in East Africa. The highest frequencies are in Tanzania Tanzania, officially the United Republic of Tanzania, is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to t ... among the Hadza at 60-83% and Sandawe at 48%. It has two branches, L4a and L4b. Subgroup L4a was formerly called L7 and considered a separate subclade of L3'4'7. It has been recognized as a subclade of L4, with L3 as its outgroup by Behar et al. (2008). The parent clade L3'4 is to have emerged at 106–66 kya. L4 is not much later than this, estimated at 87 kya by Fernandes et al. (2015).Fernandes V, Triska P, Pereira JB, Alshamali F, Rito T, Machado A, et al. (2015) Genetic Stratigraphy of Key Demographic Events in Arabia. P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
L-carrier
The L-carrier system was one of a series of carrier systems developed by AT&T for high-capacity transmission for long-distance communications. It was the first designed to handle hundreds of Voice frequency, voice frequency telephone lines, compared to earlier carrier systems which handled 12 or fewer channels. Over a period from the late 1930s to the 1970s, the system evolved in six significant phases of development, designated by Bell System engineers as L-1 through L-5, and L-5E. Coaxial cable was the principal transmission medium in all stages, initially lending the system another description i.e. the ''coaxial system''.E.L. Green, ''The Coaxial Cable System'', Bell Laboratories Record 15(9) p274 (May 1937) It was the successor to a series of previous carrier systems, typically identified by capital letters. In the 1960s, the system was hardened against the dangers of the Cold War using complete placement of all terminal and repeater equipment in hardened underground vaults. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lp Space
In mathematics, the spaces are function spaces defined using a natural generalization of the -norm for finite-dimensional vector spaces. They are sometimes called Lebesgue spaces, named after Henri Lebesgue , although according to the Bourbaki group they were first introduced by Frigyes Riesz . spaces form an important class of Banach spaces in functional analysis, and of topological vector spaces. Because of their key role in the mathematical analysis of measure and probability spaces, Lebesgue spaces are used also in the theoretical discussion of problems in physics, statistics, economics, finance, engineering, and other disciplines. Preliminaries The -norm in finite dimensions The Euclidean length of a vector x = (x_1, x_2, \dots, x_n) in the n-dimensional real vector space \Reals^n is given by the Euclidean norm: \, x\, _2 = \left(^2 + ^2 + \dotsb + ^2\right)^. The Euclidean distance between two points x and y is the length \, x - y\, _2 of the straight line b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
