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Tamper
Tamper may refer to: *Tamper, to use a tamp, a tool for material compaction *Tamper, a pipe tool component * Tamper (nuclear weapons), a layer of dense material surrounding the fissile material *Tamper, to interfere with, falsify, or sabotage * Ballast tamper, a machine that tamps railroad track ballast See also * Tampere * Tampering (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tampere
Tampere ( , , ; sv, Tammerfors, ) is a city in the Pirkanmaa region, located in the western part of Finland. Tampere is the most populous inland city in the Nordic countries. It has a population of 244,029; the urban area has a population of 341,696; and the metropolitan area, also known as the Tampere sub-region, has a population of 393,941 in an area of . Tampere is the second-largest urban area and third most-populous individual municipality in Finland, after the cities of Helsinki and Espoo, and the most populous Finnish city outside the Greater Helsinki area. Today, Tampere is one of the major urban, economic, and cultural hubs in the whole inland region. Tampere and its environs belong to the historical province of Satakunta. The area belonged to the Häme Province from 1831 to 1997, and over time it has often been considered to belong to Tavastia as a province. For example, in '' Uusi tietosanakirja'' published in the 1960s, the Tampere sub-region is presented as p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamper (nuclear Weapons)
A tamper is an optional layer of dense material surrounding the fissile material. It is used in nuclear weapon design to reduce the critical mass of a nuclear weapon and to delay the expansion of the reacting material through its inertia. Due to its inertia it delays the thermal expansion of the fissioning fuel mass, keeping it supercritical for longer. Often the same layer serves both as tamper and as neutron reflector. The weapon disintegrates as the reaction proceeds and this stops the reaction, so the use of a tamper makes for a longer-lasting, more energetic, and more efficient explosion. The yield can be further enhanced through the use of a fissionable tamper. The first nuclear weapons used heavy natural uranium or tungsten carbide tampers, but a heavy tamper necessitates a larger high-explosive implosion system, and makes the entire device larger and heavier. The primary stage of a modern thermonuclear weapon may instead use a lightweight beryllium reflector, which is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pipe Tool
A pipe tool is a small gadget designed to aid in packing, tobacco smoking, smoking, and emptying a tobacco smoking pipe (tobacco), pipe. There are three principal pipe tools: the tamper, the reamer, and the pick: *The ''tamper'' is a blunt instrument, either a simple dowel or shaped like the head of a nail. The flat end is used to tamp down the tobacco while packing the pipe, and to crush the ash together during smoking or relighting. Tampers are often made with a notch or small holes to permit airflow so that tamping the tobacco does not extinguish the flame. *The ''reamer'' or ''scoop'' is a flat instrument shaped like a dull knife blade or a flattened spoon, used to scrape ash and unburned tobacco (dottle) off the sides and bottom of a pipe. *The ''pick'' or ''poker'' is a narrow rod or pin that can be used to clear the shank of debris or aerate tightly packed tobacco. Because it is sharp, it may scratch the bowl of a pipe and so should not be used for scraping. These three to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamp
A tamp is a device used to compact or flatten an aggregate or another powdered or granular material, typically to make it resistant to further compression or simply to increase its density. Examples * Small, handheld tampers are used to compress ground coffee into a puck to prepare espresso. * Manual or powered tampers compact gravel before laying a concrete or brick patio or walkway so that the underlying gravel layer does not settle over time, or compress the fill in a utility trench as seen in the illustration. * Self-propelled, mechanised ballast tamping machines, which compact the ballast underneath rail tracks. * Preparing some firearms and artillery pieces for firing may involve tamping the charge, such as explosive material or a projectile, into the barrel. For example, muzzle loaders. * A fireplace can be tamped with a poker or similar tool to compress the material being burned (wood, coal, peat etc...). This improves the heat/burning efficiency, by reducing the vo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabotage
Sabotage is a deliberate action aimed at weakening a polity, effort, or organization through subversion, obstruction, disruption, or destruction. One who engages in sabotage is a ''saboteur''. Saboteurs typically try to conceal their identities because of the consequences of their actions and to avoid invoking legal and organizational requirements for addressing sabotage. Etymology The English word derives from the French word , meaning to "bungle, botch, wreck or sabotage"; it was originally used to refer to labour disputes, in which workers wearing wooden shoes called interrupted production through different means. A false etymology, popular but incorrect account of the origin of the term's present meaning is the story that poor workers in the Belgian city of Liège would throw a wooden into the machines to disrupt production. One of the first appearances of and in French literature is in the of d'Hautel, edited in 1808. In it the literal definition is to 'make nois ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ballast Tamper
Ballast is material that is used to provide stability to a vehicle or structure. Ballast, other than cargo, may be placed in a vehicle, often a ship or the gondola of a balloon or airship, to provide stability. A compartment within a boat, ship, submarine, or other floating structure that holds water is called a ballast tank. Water should move in and out from the ballast tank to balance the ship. In a vessel that travels on the water, the ballast will remain below the water level, to counteract the effects of weight above the water level. The ballast may be redistributed in the vessel or disposed of altogether to change its effects on the movement of the vessel. History The basic concept behind the ballast tank can be seen in many forms of aquatic life, such as the blowfish or members of the argonaut group of octopus. The concept has been invented and reinvented many times by humans to serve a variety of purposes. In the fifteenth and sixteenth century, the ballast "did not consi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
