|
Spin Peierls
Spin or spinning most often refers to: * Spinning (textiles), the creation of yarn or thread by twisting fibers together, traditionally by hand spinning * Spin, the rotation of an object around a central axis * Spin (propaganda), an intentionally biased portrayal of something Spin, spinning or spinnin may also refer to: Physics and mathematics * Spin, the rotation of an object around a central axis * Spin (physics) or particle spin, a fundamental property of elementary particles * Spin group, a particular double cover of the special orthogonal group SO(''n'') * Spin tensor, a tensor quantity for describing spinning motion in special relativity and general relativity * Spin (aerodynamics), autorotation of an aerodynamically stalled aeroplane * SPIN bibliographic database, an indexing and abstracting service focusing on physics research Textile arts * Spinning (polymers), a process for creating polymer fibres * Spinning (textiles), the creation of yarn or thread by twisting fibe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinning (textiles)
Spinning is a twisting technique to form yarn from fibers. The fiber intended is drawn out, twisted, and wound onto a bobbin. A few popular fibers that are spun into yarn other than cotton, which is the most popular, are viscose (the most common form of rayon), and synthetic polyester. Originally done by hand using a spindle whorl, starting in the 500s AD the spinning wheel became the predominant spinning tool across Asia and Europe. The spinning jenny and spinning mule, invented in the late 1700s, made mechanical spinning far more efficient than spinning by hand, and especially made cotton manufacturing one of the most important industries of the Industrial Revolution. Process The yarn issuing from the drafting rollers passes through a thread-guide, round a Ring spinning#How it works, traveller that is free to rotate around a ring, and then onto a tube or bobbin, which is carried on to a Spindle (textiles), spindle, the axis of which passes through a center of the ring. The spin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spinning (motorsport)
Spinning is a South African motorsport that involves driving cars at speed in circles and performing stunts in and out of the car. It originated in Soweto in the late 1980s, and was performed as a funeral ritual in which a stolen car was spun around to honor the deceased. It is now a recognized motorsport. History The motorsport originated in Soweto in the setting of black oppression and gangster culture. In the late 1980s, spinning increased in popularity. It was initially performed as a funeral ritual. A car would be stolen and spun around to honor the deceased. In the early 1990s, spinning became practiced outside of the criminal world. Drivers drag-raced and performed stunts with their cars. Spinning has since evolved to become more formalized as a legitimate sport, complete with promoters, performers, and spectators. Motorsport South Africa now regulates and licenses spinning events. In 2012, Motorsport South Africa recognized an event in Soweto in which the spinners recei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spin (programming Language)
The Parallax P8X32A Propeller is a multi-core processor parallel computer architecture microcontroller chip with eight 32-bit reduced instruction set computer (RISC) central processing unit (CPU) cores. Introduced in 2006, it is designed and sold by Parallax, Inc. The Propeller microcontroller, Propeller assembly language, and Spin interpreter were designed by Parallax's cofounder and president, Chip Gracey. The Spin programming language and ''Propeller Tool'' integrated development environment (IDE) were designed by Chip Gracey and Parallax's software engineer Jeff Martin. On August 6, 2014, Parallax Inc. released all of the Propeller 1 P8X32A hardware and tools as open-source hardware and software under the GNU General Public License (GPL) 3.0. This included the Verilog code, top-level hardware description language (HDL) files, Spin interpreter, PropellerIDE and SimpleIDE programming tools and compilers. Multi-core architecture Each of the eight 32-bit cores (termed a ''cog' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SPIN (operating System)
The SPIN operating system is a research project implemented in the computer programming language Modula-3, and is an open source project. It is designed with three goals: flexibility, safety, and performance. SPIN was developed at the University of Washington. The kernel can be extended by dynamic loading of modules which implement interfaces that represent domains. These domains are defined by Modula-3 INTERFACE. All kernel extensions are written in Modula-3 safe subset with metalanguage constructs and type safe casting system. The system also issued a special run-time extension compiler. One set of kernel extensions provides an application programming interface (API) that emulates the Digital Unix Tru64 UNIX is a discontinued 64-bit UNIX operating system for the Alpha instruction set architecture (ISA), currently owned by Hewlett-Packard (HP). Previously, Tru64 UNIX was a product of Compaq, and before that, Digital Equipment Corporation ... system call interface. This all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerard Holzmann
Gerard J. Holzmann (born 1951) is a Dutch-American computer scientist and researcher at Bell Labs and NASA, best known as the developer of the SPIN model checker. Biography Holzmann was born in Amsterdam, Netherlands and received an Engineer's degree in electrical engineering from the Delft University of Technology in 1976. He subsequently also received his PhD degree from Delft University in 1979 under W.L. van der Poel and J.L. de Kroes with a thesis entitled ''Coordination problems in multiprocessing systems''. After receiving a Fulbright Scholarship he was a post-graduate student at the University of Southern California for another year, where he worked with Per Brinch Hansen. In 1980 he started at Bell Labs in Murray Hill for a year. Back in the Netherlands he was assistant professor at the Delft University of Technology for two years.Holzmann, Gerard J. "The Pandora System: an interactive system for the design of data communication protocols." ''Computer Networks'' (197 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SPIN Model Checker
SPIN is a general tool for verifying the correctness of concurrent software models in a rigorous and mostly automated fashion. It was written by Gerard J. Holzmann and others in the original Unix group of the Computing Sciences Research Center at Bell Labs, beginning in 1980. The software has been available freely since 1991, and continues to evolve to keep pace with new developments in the field. Tool Systems to be verified are described in Promela (Process Meta Language), which supports modeling of asynchronous distributed algorithms as non-deterministic automata (''SPIN'' stands for "Simple Promela Interpreter"). Properties to be verified are expressed as Linear Temporal Logic (LTL) formulas, which are negated and then converted into Büchi automata as part of the model-checking algorithm. In addition to model-checking, SPIN can also operate as a simulator, following one possible execution path through the system and presenting the resulting execution trace to the user. U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fokker Spin
The Fokker ''Spin'' was the first airplane built by Dutch aviation pioneer Anthony Fokker. The many bracing wires used to strengthen the aircraft made it resemble a giant spider, hence its name ''Spin'', Dutch for "spider". Fokker built the ''Spin'' in 1910 while he was a student in Germany, assisted by Jacob Goedecker and a business partner, Franz von Daum, who procured the engine. The aircraft started out as an experimental design to provide Fokker with a means to explore his interest in flying. The first ''Spin'' was destroyed when Von Daum flew it into a tree, but the engine was still salvageable and was used to build the second version. This was built soon afterwards and was used by Fokker to teach himself to fly and to obtain his pilot license. This aircraft was also irreparably damaged by Von Daum. In Fokker's third model, he gained fame in his home country of the Netherlands by flying around the tower of the Grote or St.-Bavokerk, a church in his hometown Haarlem, on 1 S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chevrolet Spin
The Chevrolet Spin is a mini MPV produced by General Motors under the Chevrolet marque. Developed by GM do Brasil, the vehicle replaced the Meriva and Zafira in South America with an option of two-row and three-row seating. It is produced in Brazil since 2012 and has been exported throughout the South American region. Between 2013 and 2015, GM Indonesia assembled the vehicle for the Southeast Asian market at its Bekasi plant. Overview The Spin was mainly designed and engineered in Brazil by GM Brasil Centro Tecnológico São Caetano do Sul. During development, it was known as the PM5/PM7 project. The vehicle is developed to replace both the Chevrolet Meriva and Chevrolet Zafira in South America which was developed by Opel. It is built on the same platform as the Brazilian Chevrolet Cobalt. Developed with a goal of a large cabin space, the vehicle is built on a -long wheelbase which is shared with the Cobalt. For three-row models, the seats are arranged in a "theatre" for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metal Spinning
Metal spinning, also known as spin forming or spinning or metal turning most commonly, is a metalworking process by which a disc or tube of metal is rotated at high speed and formed into an axially symmetric part. Spinning can be performed by hand or by a CNC lathe. The metal spinning trade is one that dates back to antiquity and was a skill used in the Ancient Egyptian era. This is when metal spinning was limited to soft metals spun by human power on primitive lathes. The technique gave significant advances to hydro and steam power in Europe and North America in the 19th century and by the early 20th century the electric motor provided the necessary power and high-speed turning capability. With this advancement, metal spinning craftsmen were now able to spin higher quality pieces made out of brass, copper, aluminum and even stainless and cold-rolled steel. Metal spinning does not involve removal of material, as in conventional wood or metal turning, but forming (moulding) of shee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ten-pin Bowling
Ten-pin bowling is a type of bowling in which a bowler rolls a bowling ball down a wood or synthetic lane toward ten pins positioned evenly in four rows in an equilateral triangle. The objective is to knock down all ten pins on the first roll of the ball (a strike), or failing that, on the second roll (a spare). An approximately long ''approach'' area used by the bowler to impart speed and apply rotation to the ball ends in a ''foul line''. The , lane is bordered along its length by ''gutters'' (''channels'') that collect errant balls. The lane's long and narrow shape limits straight-line ball paths to angles that are smaller than optimum angles for achieving strikes; accordingly, bowlers impart side rotation to ''hook'' (curve) the ball into the pins to increase the likelihood of striking. Oil is applied to approximately the first two-thirds of the lane's length to allow a "skid" area for the ball before it encounters friction and hooks. The oil is applied in different leng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pen Spinning
Pen spinning is a form of object manipulation that involves the deft manipulation of a writing instrument with hands. Although it is often considered a form of self-entertainment (usually in a school or office setting), multinational competitions and meetings are sometimes held. It is sometimes classified as a form of contact juggling; however, some tricks, e.g. "spreads" and "aerial tricks" do leave contact with the body. In addition to writing instruments, it is often also seen performed by drummers with their drumsticks. In fact, drumsticks are substantially easier to manipulate than pens, because of their extra mass and length. Pen spinning has quickly gained international popularity through online video sharing and forums. The hobby has been popular around the world since at least the 1970s. History The earliest record of pen spinning comes from a student in pre-WWII Japan. Others in Japan spun pens at least as early as the 1970s; however, the tricks performed were only basi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spin Fishing
Spin fishing is an angling technique where a spinnerbait, a type of hybrid fishing lure with at least one freely rotating blade, is used to entice the fish to bite. When the fishing line, line is fishing reel, reeled back, the spinnerbait blades will spin passively with oncoming the water flow, in turn stirring up significant amount of turbulence and noise, which transmit through the water and provoke predatory fish to strike the lure out of their foraging as well as territory (animal), territorial instincts. Spin fishing is used in both freshwater and Marine (ocean), marine environments. Techniques When fishing in a river the line should be cast upstream. Casting upstream and retrieving with the current results in the spinner/lure sinking faster. Bottom bouncing Bottom bouncing is a spin fishing technique where the spinner is cast up river from the shore, and then allowed to bounce on the river bottom until it has moved downstream. The rod tip is held higher in the air than norm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Spinning (motorsport)")
.jpg "Click for more on -> Chevrolet Spin")
.gif "Click for more on -> Pen Spinning")
