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N Type (other)
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N-type may refer to: * N-type semiconductor is a key material in the manufacture of transistors and integrated circuits * An N-type connector is a threaded RF connector used to join coaxial cables * The MG N-type Magnette was produced by the MG Car company from October 1934 to 1936 * The N-type calcium channel is a type of voltage-dependent calcium channel * A Type (model theory) with n free variables N type (no hyphen) could refer to: * The Dennis N-Type vehicle chassis was used to build fire engines and trucks * The N type carriage is an intercity passenger carriage used on the railways of Victoria, Australia * The REP Type N was a military reconnaissance aircraft produced in France in 1914 * N type battery, see: N battery An N battery (or N cell) is a standard size of dry-cell battery. An N battery is cylindrical with electrical contacts on each end; the positive end has a bump on the top. The battery has a length of 30.2 mm and a diameter of 12.0 mm, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N-type Semiconductor
An extrinsic semiconductor is one that has been '' doped''; during manufacture of the semiconductor crystal a trace element or chemical called a doping agent has been incorporated chemically into the crystal, for the purpose of giving it different electrical properties than the pure semiconductor crystal, which is called an ''intrinsic semiconductor''. In an extrinsic semiconductor it is these foreign dopant atoms in the crystal lattice that mainly provide the charge carriers which carry electric current through the crystal. The doping agents used are of two types, resulting in two types of extrinsic semiconductor. An ''electron donor'' dopant is an atom which, when incorporated in the crystal, releases a mobile conduction electron into the crystal lattice. An extrinsic semiconductor which has been doped with electron donor atoms is called an n-type semiconductor, because the majority of charge carriers in the crystal are negative electrons. An ''electron acceptor'' dopant is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N Connector
The N connector (also, type-N connector) is a threaded, weatherproof, medium-size RF connector used to join coaxial cables. It was one of the first connectors capable of carrying microwave-frequency signals, and was invented in the 1940s by Paul Neill of Bell Labs, after whom the connector is named. Design The interface specifications for the N and many other connectors are referenced in MIL-STD-348. Originally, the connector was designed to carry signals at frequencies up to 1 GHz in military applications, but today's common Type N easily handles frequencies up to 11 GHz. More recent precision enhancements to the design by Julius Botka at Hewlett Packard have pushed this to 18 GHz. The male connector is hand-tightened (though versions with a hex nut are also available) and has an air gap between the center and outer conductors. The coupling has a -24 UNEF thread. Amphenol suggests tightening to a torque of , while Andrew Corporation suggest for their hex nut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MG N-type
The MG N-type Magnette is a sports car that was produced by MG from October 1934 to 1936. The car was developed from the K-Type and L-Type but had a new chassis that broke away in design from the simple ladder type used on the earlier cars of the 1930s being wider at the rear than the front and with the body fitted to outriggers off the main frame. __TOC__ NA The engine was a further development of the 1271 cc 6-cylinder KD series overhead camshaft engine used in the K-type and originally used in the 1930 Wolseley Hornet. Modifications were made to the cylinder block and head and fitted with twin SU carburettors it produced at 5500 rpm, a near 25% improvement. Drive was to the rear wheels through a four-speed non-synchromesh gearbox. The car had a wheelbase of 96 inches (2439 mm) and a track of 45 inches (1143 mm). Semi elliptic leaf springs, wider and longer than those used on previous cars, were fitted all round and the body was mounted to the ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N-type Calcium Channel
N-type calcium channels also called Cav2.2 channels are voltage gated calcium channels that are localized primarily on the nerve terminals and dendrites as well as neuroendocrine cells. The calcium N-channel consists of several subunits: the primary subunit α1B and the auxiliary subunits α2δ and β. The α1B subunit forms the pore through which the calcium enters and helps to determine most of the channel's properties. These channels play an important role in the neurotransmission during development. In the adult nervous system, N-type calcium channels are critically involved in the release of neurotransmitters, and in pain pathways. N-type calcium channels are the target of ziconotide, the drug prescribed to relieve intractable cancer pain. There are many known N-type calcium channel blockers that function to inhibit channel activity, although the most notable blockers are ω-conotoxins. Structure N-type calcium channels are categorized as high threshold-activated channels ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type (model Theory)
In model theory and related areas of mathematics, a type is an object that describes how a (real or possible) element or finite collection of elements in a mathematical structure might behave. More precisely, it is a set of first-order formulas in a language ''L'' with free variables ''x''1, ''x''2,…, ''x''''n'' that are true of a sequence of elements of an ''L''-structure \mathcal. Depending on the context, types can be complete or partial and they may use a fixed set of constants, ''A'', from the structure \mathcal. The question of which types represent actual elements of \mathcal leads to the ideas of saturated models and omitting types. Formal definition Consider a structure \mathcal for a language ''L''. Let ''M'' be the universe of the structure. For every ''A'' ⊆ ''M'', let ''L''(''A'') be the language obtained from ''L'' by adding a constant ''c''''a'' for every ''a'' ∈ ''A''. In other words, :L(A) = L \cup \. A 1-type (of \mathcal) over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dennis N-Type
The Dennis N-Type is a model of commercial vehicle introduced by Dennis Brothers of Guildford (later Dennis Specialist Vehicles) in around 1905. It was the basis for their early fire engines and trucks. Specification The "N-Type" chassis was constructed from rolled steel channel; riveted and braced at appropriate points. It incorporated a sub frame on which the engine and gearbox were mounted. As for later Dennis fire engines, the water pump was a centrifugal pump, rather than the piston pumps used by other makers. This was more complex to build than the long-established piston pumps, but had advantages in operation. Where water was supplied under pressure from a hydrant, rather than by suction from a pond, this additional pressure was boosted through the centrifugal pump, whereas a piston pump would have throttled it. Piston pumps also gave a pulsating outlet pressure which required an air-filled receiver to even this out. A drawback of the usual centrifugal design was the cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
N Type Carriage
The N type carriages are an intercity passenger carriage used on the railways of Victoria, Australia. They were introduced between 1981 and 1984 as part of the 'New Deal' reforms of country passenger rail services. Today they are seen on both V/Line long distance InterCity services, and limited commuter services to Geelong. The carriage sets have both first class 2+2 seating, and 2+3 economy seating. Snack bar facilities are also provided on board. Originally delivered as three-car sets, some sets were extended in length with S and Z type carriages. Today the carriages are hauled by N class diesel locomotives. The carriages can use an external head end power supply for lighting and air conditioning operation. Each carriage has two swing doors per side, which were originally manually opened by passengers, but have since been converted to powered operation, and they are locked or unlocked by the conductor. Toilets, drinking fountains and luggage areas are provided throughout e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
REP Type N
The REP Type N was a military reconnaissance monoplane produced in France in 1914.Taylor 1989, p.758 Design and Development It was a wire-braced, mid-wing monoplane of conventional design with fixed, tailskid undercarriage.Davilla & Soltan 2002, p.431 The fuselage was constructed of steel tube and was of triangular cross-section, with the apex on the ventral side. The pilot and observer sat in tandem, open cockpits. Lateral control was by wing warping. Operational history The type was selected by the ''Aéronautique Militaire'' to equip two squadrons, REP 15 and REP 27. Type Ns from the former unit flew reconnaissance missions during the Battle of Charleroi in August 1914, and Type Ns from both units flew missions during the First Battle of the Marne in September. Intelligence provided by reconnaissance aircraft proved a decisive factor in the Allied victory at the Marne.Lawson 1996, p.40 In January 1915, the two units merged and were re-equipped with Caudron G.3s, but continu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
