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Tack (maneuver), Change Tack
Tack may refer to: People Given name or nickname * Tacks Latimer (1875–1936), American baseball catcher * Tacks Neuer (1877–1966), American baseball pitcher * Tack Wilson (born 1955), American baseball outfielder * Wong Tack (born 1959), Malaysian politician * Irwin "Tack" Kuntz (), American pharmaceutical chemist Surname * François Tack (–1686), Dutch East India Company officer * Augustus Vincent Tack (1870–1949), American painter * Anita Tack (born 1951), German politician of the Left Party * Erik Tack (born 1958), Belgian politician * Kerstin Tack (born 1968), German politician of the Social Democratic Party Implements, and creative or constructive tasks and materials * Tack (sewing) (also ''baste'' or ''pin''), quick, temporary stitching intended to be removed * Blu Tack, a reusable putty-like pressure-sensitive adhesive used for attaching paper items to walls * Horse tack, equipment used to allow riding or driving of horses and some other riding animals * Thumbtack ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tacks Latimer
Clifford Wesley "Tacks" Latimer (November 30, 1875 – April 24, 1936) was an American professional baseball catcher who played in Major League Baseball for the New York Giants, Louisville Colonels, Pittsburgh Pirates, Baltimore Orioles, and Brooklyn Superbas from 1898 to 1902. Including the years he played only in the minor leagues or as a semi-professional, Latimer's career ranged from 1895 to 1908. After his playing career ended, Latimer became a police officer with the Pennsylvania Railroad. In 1924, after a dispute with another police officer, Latimer shot him four times in the back, killing him. Latimer was found guilty of second-degree murder and sentenced to life imprisonment. He received a pardon in 1930 for his heroism during a prison break. Early life Clifford Wesley Lattimer was born in Loveland, Ohio, on November 30, 1875, to John Wesley and Nora ( née McAdams) Lattimer. At some point, his name was changed to "Latimer". He began playing baseball with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tacking (sailing)
Tacking is a sailing maneuver by which a sailing vessel, whose desired course is into the wind, turns its bow toward and through the wind so that the direction from which the wind blows changes from one side of the boat to the other, allowing progress in the desired direction. The opposite maneuver to tacking is called 'jibe', or 'wearing' on square-rigged ships, that is, turning the stern through the wind. No sailing vessel can move directly upwind, though that may be the desired direction, making this an essential maneuver of a sailing ship. A series of tacking moves, in a zig-zag fashion, is called beating, and allows sailing in the desired direction. This maneuver is used for different effects in races, where one ship is not only sailing in a desired direction, but also concerned with slowing the progress of competitors. The need for tacking Sailing ships cannot proceed directly into the wind, but often need to go in that direction. Movement is achieved by tacking. If a v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Left Tack
In mathematical logic and computer science the symbol \vdash has taken the name turnstile because of its resemblance to a typical turnstile if viewed from above. It is also referred to as tee and is often read as "yields", "proves", "satisfies" or "entails". Interpretations The turnstile represents a binary relation. It has several different interpretations in different contexts: * In epistemology, Per Martin-Löf (1996) analyzes the \vdash symbol thus: "... e combination of Frege's , judgement stroke and , content stroke €” came to be called the assertion sign." Frege's notation for a judgement of some content ::\vdash A :can then be read ::''I know is true''. :In the same vein, a conditional assertion ::P \vdash Q :can be read as: ::''From , I know that '' * In metalogic, the study of formal languages; the turnstile represents syntactic consequence (or "derivability"). This is to say, that it shows that one string can be derived from another in a single step, acc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Up Tack
The up tack or falsum (⊥, \bot in LaTeX, U+22A5 in Unicode) is a constant symbol used to represent: * The truth value 'false', or a logical constant denoting a proposition in logic that is always false (often called "falsum" or "absurdum"). * The bottom element in wheel theory and lattice theory, which also represents absurdum when used for logical semantics * The bottom type in type theory, which is the bottom element in the subtype relation. This may coincide with the empty type, which represents absurdum under the Curry–Howard correspondence as well as * Mixed radix decoding in the APL programming language The glyph of the up tack appears as an upside-down tee symbol, and as such is sometimes called eet (the word "tee" in reverse). Tee plays a complementary or dual role in many of these theories. The similar-looking perpendicular symbol (⟂, \perp in LaTeX, U+27C2 in Unicode) is a binary relation symbol used to represent: * Perpendicularity of lines in geometry * Ortho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Down Tack
The tee (⊤, \top in LaTeX) also called down tack (as opposed to the up tack) or verum is a symbol used to represent: * The top element in lattice theory. * The truth value of being true in logic, or a sentence (e.g., formula in propositional calculus) which is unconditionally true. By definition, every tautology is logically equivalent to the verum. * The top type in type theory. * Mixed radix encoding in the APL programming language. A similar-looking superscript T may be used to mean the transpose of a matrix. Encoding In Unicode, the tee character is encoded as . The symbol is encoded in LaTeX as \top. A large variant is encoded as in the Unicode block Miscellaneous Mathematical Symbols-A. See also *Turnstile (⊢) *Up tack (⊥) *Falsum *List of logic symbols *List of mathematical symbols A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Right Tack
Right Tack (1966–1985) was an Irish-bred, British-trained Thoroughbred racehorse and sire. In a career that lasted from June 1968 to October 1969 he ran twelve times, winning eight races and finishing second three times. As a two-year-old he won his last five races included the Middle Park Stakes and was rated the second-best British colt of his generation. In the following year he became the first horse to win both the 2000 Guineas at Newmarket and the Irish 2000 Guineas at the Curragh. After being retired from racing he stood as a breeding stallion in Ireland and Australia. Background Right Tack was a bay horse bred in County Meath, Ireland by Paul Larkin. As a weanling he was sent to the Dublin November sales where he was bought for 700 guineas by Philip O'Dwyer. A year later O'Dwyer was able to make a profit on the deal when he sold Right Tack for 3,200 guineas at the Doncaster yearling sale. The colt was bought by bloodstock agents acting on behalf of Jim Brown, a Du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moxie Marlinspike
Moxie Marlinspike is an American entrepreneur, cryptographer, and computer security researcher. Marlinspike is the creator of Signal, co-founder of the Signal Technology Foundation, and served as the first CEO of Signal Messenger LLC. He is also a co-author of the Signal Protocol encryption used by Signal, WhatsApp, Google Messages, Facebook Messenger, and Skype. Marlinspike is a former head of the security team at Twitter and the author of a proposed SSL authentication system replacement called Convergence. He previously maintained a cloud-based WPA cracking service and a targeted anonymity service called GoogleSharing. Career Marlinspike began his career working for several technology companies, including enterprise infrastructure software maker BEA Systems Inc. In 2010, Marlinspike was the chief technology officer and co-founder of Whisper Systems, an enterprise mobile security startup company. In May 2010, Whisper Systems launched TextSecure and RedPhone. These were appl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TACK
TACK is a group of archaea acronym for Thaumarchaeota (now Nitrososphaerota), Aigarchaeota, Crenarchaeota (now Thermoproteota), and Korarchaeota, the first groups discovered. They are found in different environments ranging from acidophilic thermophiles to mesophiles and psychrophiles and with different types of metabolism, predominantly anaerobic and chemosynthetic. TACK is a clade that is close to the branch that gave rise to the eukaryotes. It has been proposed that the TACK clade be classified as Crenarchaeota and that the traditional "Crenarchaeota" (Thermoproteota) be classified as a class called "Sulfolobia", along with the other phyla with class rank or order. Classification * Thermoproteota (formerly Crenarchaeota). It is the best known edge and the most abundant archaea in the marine ecosystem. They were previously called sulfobacteria because of their dependence on sulfur and are important as carbon fixers. There are hyperthermophiles in hydrothermal vents and othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Tack Hypothesis
In planetary astronomy, the grand tack hypothesis proposes that Jupiter formed at 3.5 AU, then migrated inward to 1.5 AU, before reversing course due to capturing Saturn in an orbital resonance, eventually halting near its current orbit at 5.2 AU. The reversal of Jupiter's planetary migration is likened to the path of a sailboat changing directions ( tacking) as it travels against the wind. The planetesimal disk is truncated at 1.0 AU by Jupiter's migration, limiting the material available to form Mars. Jupiter twice crosses the asteroid belt, scattering asteroids outward then inward. The resulting asteroid belt has a small mass, a wide range of inclinations and eccentricities, and a population originating from both inside and outside Jupiter's original orbit. Debris produced by collisions among planetesimals swept ahead of Jupiter may have driven an early generation of planets into the Sun. Description In the ''grand tack hypothesis'' Jupiter underwent a two-phase migration after ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tackers
Tackers was the name given to High Tory Members of Parliament who in 1704 tried to attach ('tack') an Occasional Conformity Bill to money bills in order to pass it through the House of Lords and into law. The Tackers ultimately failed in their efforts, but their actions proved highly polarising in the 1705 English general election. While there were some successful Whig campaigns to unseat Tacker MPs, some parts of the country had the Tories successfully campaign under the rallying cry of ' Church in Danger', with the Tackers' efforts being positively seen as an effort to protect the established Church of England from nonconformists and Dissent. The Tackers' actions caused Queen Anne to turn away from their party as the War of Spanish Succession continued for the next decade. Instead, she added more Whigs to her government, leading to the revival of the Whig Junto The Whig Junto is the name given to a group of leading Whigs who were seen to direct the management of the Whig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adhesion
Adhesion is the tendency of dissimilar particles or surfaces to cling to one another ( cohesion refers to the tendency of similar or identical particles/surfaces to cling to one another). The forces that cause adhesion and cohesion can be divided into several types. The intermolecular forces responsible for the function of various kinds of stickers and sticky tape fall into the categories of chemical adhesion, dispersive adhesion, and diffusive adhesion. In addition to the cumulative magnitudes of these intermolecular forces, there are also certain emergent mechanical effects. Surface energy Surface energy is conventionally defined as the work that is required to build an area of a particular surface. Another way to view the surface energy is to relate it to the work required to cleave a bulk sample, creating two surfaces. If the new surfaces are identical, the surface energy γ of each surface is equal to half the work of cleavage, W: γ = (1/2)W11. If the surfac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tacksman
A tacksman ( gd, Fear-Taic, meaning "supporting man"; most common Scots spelling: ''takisman'') was a landholder of intermediate legal and social status in Scottish Highland society. Tenant and landlord Although a tacksman generally paid a yearly rent for the land let to him (his "tack"), his tenure might last for several generations. He would often be related to his landlord and might, for example, represent a cadet branch of the family of the clan chief. The tacksman in turn would let out his land to sub-tenants, but he might keep some in hand himself. Dr Johnson defined the class in this manner: The three fundamental obligations traditionally imposed on tacksmen were grassum (a premium payable on entering into a lease), rental (either in kind, or in money, which was designated "tack-duty"), and the rendering of military service.Alexander Nicholson, ''History of Skye'' (3rd edition, Islands Book Trust, 2012), at pages 127 to 128. Inheritance As described by James Mitchell: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
