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KF (coop)
KF or Kf may refer to: Businesses and brands: * KF Aerospace, a Canadian aerospace company ** KF Cargo, a Canadian cargo airline ** KF Defence Programs, a Canadian defense contractor * Korea Foundation * Air Belgium, an airline based in Belgium (IATA code KF) * Blue1, a defunct airline based in Finland (IATA code KF) * Kettle Foods, a snack foods manufacturer * Kooperativa Förbundet, a cooperative Swedish retail chain * KrisFlyer, the frequent flyer program of Singapore Airlines * A member of the Mazda K engine family * Kiwi Farms Games: * ''Katamari Forever'', a video game for the PlayStation 3 * ''Killing Floor'' (2009 video game), a cooperative survival horror video game Science and technology: * A member of the Mazda K engine family * Kalman Filter, in mathematics * Potassium fluoride, a chemical substance * Klein Flange, a quick release vacuum flange * Cryoscopic constant, Kf, related to freezing-point depression * Karl Fischer titration * Stability constants of complexes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KF Aerospace
KF Aerospace is an approved maintenance organization (AMO) which operates two maintenance, repair and overhaul (MRO) facilities in Canada, one at Kelowna International Airport in British Columbia and the other at Hamilton International Airport in Ontario. It is the parent company of KF Cargo, which provides cargo aircraft charter and leasing services, and KF Defence Programs, contract operator of the Canadian Forces Contracted Flying Training and Support program. History The company was established as Kelowna Flightcraft on March 20, 1970 and the charter subsidiary Kelowna Flightcraft Air Charter was established and started operating in June 1974. It is wholly owned by Barry Lapointe Holding. In 1996, Kelowna Flightcraft was operating Boeing 727-200 jets in scheduled passenger airline service on a contract basis for Greyhound Air, a Canadian-based new startup air carrier. Flightcraft's extensive history in maintenance work directed to the ubiquitous Boeing 727 "feederliner" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Katamari Forever
''Katamari Forever'', known in Japan as , is a video game in the ''Katamari'' series. The game was released for the PlayStation 3 console in Japan on July 23, 2009, on September 22, 2009 in North America, and September 18, 2009 in Europe. A demo of the game became available on the Japanese PlayStation Network on its Japanese release date, and on the North American PlayStation Network on September 10, 2009. Story and gameplay ''Katamari Forever'' contains 34 stages, with all but three of the stages being taken from previous titles in the series. Half of the stages take place within the mind of the King of All Cosmos, who gets knocked in the head and suffers from amnesia. The levels are black-and-white in appearance, and the objective is to roll up junk to bring color back to the stages, restoring the King's memory. The other half of the stages take place in the present, where RoboKing, a robotic version of the King of All Cosmos created by the Prince and his cousins, goes on a rampa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stability Constants Of Complexes
In coordination chemistry, a stability constant (also called formation constant or binding constant) is an equilibrium constant for the formation of a complex in solution. It is a measure of the strength of the interaction between the reagents that come together to form the complex. There are two main kinds of complex: compounds formed by the interaction of a metal ion with a ligand and supramolecular complexes, such as host–guest complexes and complexes of anions. The stability constant(s) provide(s) the information required to calculate the concentration(s) of the complex(es) in solution. There are many areas of application in chemistry, biology and medicine. History Jannik Bjerrum (son of Niels Bjerrum) developed the first general method for the determination of stability constants of metal-ammine complexes in 1941. The reasons why this occurred at such a late date, nearly 50 years after Alfred Werner had proposed the correct structures for coordination complexes, have been s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Fischer Titration
Karl Fischer titration is a classic titration method in chemical analysis that uses coulometric or volumetric titration to determine trace amounts of water in a sample. It was invented in 1935 by the German chemist Karl Fischer. Today, the titration is done with an automated Karl Fischer titrator. Chemical principle The elementary reaction responsible for water quantification in the Karl Fischer titration is oxidation of sulfur dioxide with iodine: : 2 H2O + SO2 + I2 → H2SO4 + 2 HI This elementary reaction consumes exactly one molar equivalent of water vs. iodine. Iodine is added to the solution until it is present in excess, marking the end point of the titration, which can be detected by potentiometry. The reaction is run in an alcohol solution containing a base, which consumes the sulfur trioxide and hydroiodic acid produced. Coulometric titration The main compartment of the titration cell contains the anode solution plus the analyte. The anode solution consists of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freezing-point Depression
Freezing-point depression is a drop in the minimum temperature at which a substance freezes, caused when a smaller amount of another, non- volatile substance is added. Examples include adding salt into water (used in ice cream makers and for de-icing roads), alcohol in water, ethylene or propylene glycol in water (used in antifreeze in cars), adding copper to molten silver (used to make solder that flows at a lower temperature than the silver pieces being joined), or the mixing of two solids such as impurities into a finely powdered drug. In all cases, the substance added/present in smaller amounts is considered the solute, while the original substance present in larger quantity is thought of as the solvent. The resulting liquid solution or solid-solid mixture has a lower freezing point than the pure solvent or solid because the chemical potential of the solvent in the mixture is lower than that of the pure solvent, the difference between the two being proportional to the natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryoscopic Constant
In thermodynamics, the cryoscopic constant, , relates molality to freezing point depression (which is a colligative property). It is the ratio of the latter to the former: :\Delta T_f = -i \cdot K_f \cdot b * is the van ‘t Hoff factor, the number of particles the solute splits into or forms when dissolved. * is the molality of the solution. Through cryoscopy, a known constant can be used to calculate an unknown molar mass. The term "cryoscopy" comes from Greek and means "freezing measurement." Freezing point depression is a colligative property, so depends only on the number of solute particles dissolved, not the nature of those particles. Cryoscopy is related to ebullioscopy, which determines the same value from the ebullioscopic constant (of boiling point elevation). The value of , which depends on the nature of the solvent can be found out by the following equation: :K_ = \frac * is the ideal gas constant * is the molar mass In chemistry, the molar mass of a ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Flange
A vacuum flange is a flange at the end of a tube used to connect vacuum chambers, tubing and vacuum pumps to each other. Vacuum flanges are used for scientific and industrial applications to allow various pieces of equipment to interact via physical connections and for vacuum maintenance, monitoring, and manipulation from outside a vacuum's chamber. Several flange standards exist with differences in ultimate attainable pressure, size, and ease of attachment. Vacuum flange types Several vacuum flange technical standard, standards exist, and the same flange types are called by different names by different manufacturers and standards organizations. KF/QF The International Organization for Standardization, ISO standard quick release flange is known by the names Quick Flange (QF) or Kleinflansch (KF, German which translates to "Small flange" in English). The KF designation has been adopted by ISO, DIN, and Pneurop. KF flanges are made with a chamfered back surface that are attached with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potassium Fluoride
Potassium fluoride is the chemical compound with the formula KF. After hydrogen fluoride, KF is the primary source of the fluoride ion for applications in manufacturing and in chemistry. It is an alkali halide and occurs naturally as the rare mineral carobbiite. Solutions of KF will etch glass due to the formation of soluble fluorosilicates, although HF is more effective. Preparation Potassium fluoride is prepared by dissolving potassium carbonate in hydrofluoric acid. Evaporation of the solution forms crystals of potassium bifluoride. The bifluoride on heating yields potassium fluoride: : K2CO3 + 4HF -> 2KHF2 + CO2 ^ + H2O : KHF2 -> KF + HF ^ Platinum or heat resistant plastic containers are often used for these operations. Potassium chloride converts to KF upon treatment with hydrogen fluoride. In this way, potassium fluoride is recyclable. Crystalline properties KF crystallizes in the cubic NaCl crystal structure. The lattice parameter at room temperature is 0.266 nm. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kalman Filter
For statistics and control theory, Kalman filtering, also known as linear quadratic estimation (LQE), is an algorithm that uses a series of measurements observed over time, including statistical noise and other inaccuracies, and produces estimates of unknown variables that tend to be more accurate than those based on a single measurement alone, by estimating a joint probability distribution over the variables for each timeframe. The filter is named after Rudolf E. Kálmán, who was one of the primary developers of its theory. This digital filter is sometimes termed the ''Stratonovich–Kalman–Bucy filter'' because it is a special case of a more general, nonlinear filter developed somewhat earlier by the Soviet mathematician Ruslan Stratonovich. In fact, some of the special case linear filter's equations appeared in papers by Stratonovich that were published before summer 1960, when Kalman met with Stratonovich during a conference in Moscow. Kalman filtering has numerous tech ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Killing Floor (2009 Video Game)
''Killing Floor'' is a cooperative first-person shooter video game developed and published by Tripwire Interactive. It was originally released as an ''Unreal Tournament 2004'' mod in 2005. A full retail release followed on May 14, 2009, for Microsoft Windows, and for OS X on May 5, 2010. The Linux version was released on the Steam platform in November 2012. A sequel, ''Killing Floor 2'', was announced on May 8, 2014, and released on November 18, 2016, worldwide. Gameplay ''Killing Floor'' is a first-person shooter with two game modes: ''Killing Floor'' and ''Objective''. In Killing Floor mode, the player fights waves of zombie-like specimens - or ZEDs - with each wave becoming successively more difficult, until it concludes with a battle against a "boss" specimen called ''the Patriarch''. In Objective mode players complete different challenges while earning in-game money, which they can spend between waves at a trader. The trader buys and sells ammo, armor, and weapons, such as k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kiwi Farms
Kiwi Farms, formerly known as CWCki Forums ( ), is an Internet forum that facilitates the discussion and harassment of online figures and communities. Their targets are often subject to organized group trolling and stalking, as well as doxxing and real-life harassment. These actions have tied Kiwi Farms to the suicides of three people targeted by members of the forum. Kiwi Farms' connection to several controversies and harassment campaigns has caused the forum to be blocked by Internet service providers or refused service by companies. After the Christchurch mosque shootings, some Internet service providers in New Zealand blocked the site. In 2021, after the suicide of Near, a non-binary software developer who was subject to targeted and organised group harassment by members of the site, DreamHost stopped providing their domain registration services to Kiwi Farms. In September 2022, Kiwi Farms was blocked by Cloudflare due to "an imminent and emergency threat to human life". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
KF Cargo
Kelowna Flightcraft Air Charter trading as KF Cargo and Kelowna Flightcraft trading as KF Maintenance and Engineering is a cargo airline based in Kelowna, British Columbia, Canada. It operates long term cargo charters for couriers and freight companies, forest fire patrols, and aircraft sales and leasing in Canada and worldwide. It also provides maintenance and aircraft manufacturing services. History KF Cargo is a subsidiary company of KF Aerospace, which was established as Kelowna Flightcraft on March 20, 1970 and the cargo subsidiary was established and started operating in June 1974. It is wholly owned by Barry Lapointe Holding. Destinations KF Cargo operates air cargo services to the following destinations: * John C. Munro Hamilton International Airport Hub *Kamloops Airport *Kelowna International Airport Hub *Prince George Airport *Vancouver International Airport Hub *Victoria International Airport Fleet Current fleet As of September 2019, KF Cargo/KF Maintenance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
