motors. An induction or asynchronous motor is a type of AC motor where power is supplied to the rotor ... in 1882 and used it to invent the first inductionmotor in 1883 ref Prodigal Genius The Life of Nikola ... operation ref http www.fi.edu learn case files tesla motor.html Two Phase InductionMotor 2011 , The Case ... 381,968 for his motor. The inductionmotor with a cage was invented by Mikhail Dolivo Dobrovolsky ... magnetic field in an inductionmotor. In both induction and synchronous motor s, the stator is powered ... at the same rate as the stator field. By contrast, in an inductionmotor the rotor rotates at a slower ... motor can be used as induction generator , or it can be unrolled to form the linear induction .... ref TORQUE SLIP CHARACTERISTICS OF INDUCTIONMOTOR By Avinash SrivastavaRavi Kumar MTECH CAID MSRIT ... Quadrupole magnet quadrupole field . The stator of an inductionmotor consists of poles carrying supply ... of the inductionmotor is controlled by the number of pole pairs and the frequency of the supply voltage ... circuit of an inductionmotor. The equivalent circuit of an inductionmotor has the equivalent ... motor equivalent circuit when idle is approximately math R s X s math , which is mostly reactive. Induction ... R r math . Due to the construction of the inductionmotor, the two resistances induce magnetic flux ... motor AC.svg thumb Torque curves for 4 types of asynchronous induction motors br A Single phase ... double squirrel cage motor A single phase inductionmotor is not self starting thus, it is necessary ... phase inductionmotor. The normal running windings within such a motor can cause the rotor to turn ... motor is self starting and produces torque even at standstill. The four methods of starting an induction ... control and speed control. Linear inductionmotor main linear inductionmotor A linear inductionmotor LIM is an AC asynchronous linear motor that works by the same general principles as other induction ... result&resnum 14&sqi 2&ved 0CFoQ6AEwDQ v onepage&q&f false title The inductionmotor its theory ... more details
File Linear induction motor.gif thumb right A transverse flux linear inductionmotor here the primary ... by Eric Laithwaite A linear inductionmotor LIM is an AC asynchronous linear motor that works by the same general principles as other inductionmotor s but which has been designed to directly produce ... ref but Wheatstone s model was too inefficient to be practical. A feasible linear inductionmotor ... of it magnetic river . These versions of the linear inductionmotor use a principle called transverse ... THE LIMTV LINEAR INDUCTIONMOTOR TEST VEHICLE IS TESTED AT THE DEPARTMENT OF TRANSPORTATION S HIGH SPEED GROUND... NARA 545942.tif thumb right LIMTV Linear InductionMotor Test Vehicle in 1973 Because ... run LSM is mostly preferred. File EMALS.JPG thumb A diagram of EMALS inductionmotor Linear induction ... of Linear InductionMotor for Magnetic Levitation System 14th International Power Electronics and Motion Control Conference, EPE PEMC 2010 ref End effect Unlike a circular inductionmotor, a linear induction ... Advanced Rapid Transit ART trains propel themselves using an aluminium induction strip placed ... Technical drawing drafting , and cable forming. Most linear motors in use are LIM linear inductionmotor , LSM linear synchronous motor . Linear DC motors are not used as it includes more cost and linear ... to be delivered in 2010. Construction A linear electric motor s primary typically consists of a flat .... Two sorts of linear motor exist, short primary , where the coils are truncated shorter than the secondary ... Moving magnetic field File Linear motor field.gif thumb The magnetic field of a linear motor sweeping ... motor, the force is produced by a moving linear magnetic field acting on conductors in the field ... will have eddy current s electromagnetic induction induced in it thus creating an opposing magnetic ... MAs.svg thumb right Thrust generated as a function of slip The drive generated by linear induction motors is somewhat similar to conventional induction motors the drive forces show a roughly similar characteristic ... more details
wiktionary inductionInduction may refer to General use Induction birth , induction of childbirth Rite of passage Induction day Introduction of an individual into a body such as the armed forces Canonical ... been presented and instituted Student orientation , an induction program for new students at Universities Teacher induction , the support and guidance provided to novice educators in the early stages of their careers Induction teachers , the period of one year following qualification as a teacher in the United Kingdom Induction play , an opening scene in a play, notably used in early English plays ... uses span id In biology and chemistry Induction biology merged here In biology and chemistry Inductive effect is the redistribution of electron density through molecular sigma bonds Induction period ... or inhibits the expression of an enzyme Induction birth , induction of childbirth Asymmetric induction ... Enzyme induction and inhibition span In mathematics Mathematical induction , a method of proof in the field of mathematics Strong induction , or Complete induction, a variant of mathematical induction Transfinite induction , a kind of mathematical induction Epsilon induction , a kind of transfinite induction Structural induction , a generalization of mathematical induction statistical inference Statistical induction , also known as statistical inference. induced representation , in representation .... Parabolic induction a method of constructing group representations of a reductive group from representations ... , a form of reasoning often confused with scientific reasoning Backward induction in game theory and economics Concept learning is the induction of a concept category from observations In physics Electromagnetic induction in physics and engineering Induction heating , the process of heating an electrically conducting object Induction cooker , which uses induction heating for cooking. Electrostatic induction in physics Forced induction , with combustion engines, is the use of a gas compressor ... more details
of the rotating flux, the machine acts like an inductionmotor. If the rotor is turned faster ..., 440 V, 3 phase inductionmotor as an asynchronous generator. Full load current of the motor is 10 ...An induction generator or asynchronous generator is a type of AC electrical generator that uses the principles of inductionmotor s to produce power. Induction generators operate by mechanically turning their rotor faster than the synchronous speed, giving negative slip. A regular AC asynchronous motor can be used a generator, without any internal modifications. Induction generators are useful in applications ... to lower pressure, because they can recover energy with relatively simple controls. An induction generator ... distribution system. Principle of operation Induction generators and motors produce electrical power when their rotor is turned faster than the synchronous speed . For a typical four pole motor two pairs ... minute. The same four pole motor operating on a 50 Hz grid will have a synchronous speed of 1500 RPM. In normal motor operation, stator flux rotation is faster than the rotor rotation. This causes the stator ... cutting the stator coils, an active current is produced in stator coils, and the motor now operates ... Equivalent circuit of induction generator Note that a source of excitation current for magnetizing flux reactive power for stator is still required, to induce rotor current. Induction generators are not, in general ... the rotating magnetic flux although in practice an induction generator will often self start ... is reached at very small slip values motor dependent, typically 3 . At synchronous speed of 1800 ... bank must supply reactive power to the motor when used in stand alone mode. The reactive power supplied ... as a motor. Terminal voltage will increase with capacitance, but is limited by iron saturation. Grid ... Typical connections when used as a standalone generator In induction generators the magnetizing flux .... Use of induction generators Induction generators are often used in wind turbines and some micro hydro ... more details
became common place in induction forging and large induction hardening applications. The motor generator ... state power supplies In the early days of induction heating, the motor generator was used extensively ... frequency such as 150 Hz using a standard inductionmotor driving an AC generator, there are limitations ... provided by a standard inductionmotor for convention and simplicity. Both vertical and horizontal ...Distinguish Induction cooker An induction heater is a key piece of equipment used in all forms of induction heating . Typically an induction heater operates at either medium frequency MF or radio frequency ... induction heater including the power unit power inverter , the work head transformer and the coil inductor . Induction heating is a non contact method of heating a conductive body by utilising a strong magnetic field . Supply mains frequency 50 60 Hz induction heaters incorporate a coil directly ... temperatures are required. Main equipment components An induction heater typically consists of three ... in itself. ref Rudnev, p. 629. ref Definition The term RF induction is traditionally used to describe induction generators designed to work in the frequency range from 100 kHz up to 10 ... range typically incorporates 2.5 to 40 kW. Generally, the induction heaters in this range are used for smaller components and applications such as induction hardening an engine valve. ref Rudnev, p. 227. ref The term MF induction is traditionally used to describe induction generators designed to work ... kW. Induction heaters operating within these ranges are normally utilised on medium to larger components and applications such as the induction forging of a shaft. ref name Rudnev229 The term Mains or supply frequency is traditionally used to describe induction coils driven directly from the standard a.c. supply. Most mains frequency induction coils are designed for single phase operation ..., such as in a drum heater . History The basic principle involved in induction heating was discovered ... more details
tablet Hall effect meters Induction cooker s Inductionmotor s Induction sealing Induction welding ...electromagnetism cTopic Classical electromagnetism Electrodynamics Electromagnetic induction is the production of an electric current across a Electrical conductor conductor moving through a magnetic field . It underlies the operation of electrical generator generator s, transformer s, inductionmotor s, electric motor s, synchronous motor s, and solenoid s. ref cite web author date 1999 22 07 title Applications of electromagnetic induction url http physics.bu.edu duffy py106 Electricgenerators.html publisher Boston University accessdate ref Michael Faraday is generally credited with the discovery of induction in 1831 though it may have been anticipated by the work of Francesco Zantedeschi in 1829. ref cite book title Hans Christian rsted and the romantic legacy in science ideas, disciplines, practices author S M Dhir url http books.google.co.in books?id ZgpmpOOHm80C&pg PA350&dq Francesco Zantedeschi electromagnetic induction&hl en&sa X&ei 6l0pT4K1GsXprAfguYmUAw&ved 0CD0Q6AEwAQ v onepage&q Francesco 20Zantedeschi 20electromagnetic 20induction&f false chapter 6 Other posive results and criticism publisher Springer year 2007 isbn 978 1 4020 2987 5 ref Around 1830 ref cite web author date title Magnets url http library.thinkquest.org 13526 c3c.htm publisher Oracle Thinkquest ThinkQuest ... of induction Michael Faraday formulated that electromotive force EMF produced around a closed path ... it. In mathematical form, Faraday s law of induction Faraday s law states that math mathcal E d Phi ... 20 ref Applications The principles of electromagnetic induction are applied in many devices and systems ... list 3 Eddy current Faraday s law of induction Gravitational induction Inductance Maxwell s equations ... Lenz s Law at work . DEFAULTSORT Electromagnetic Induction Category Electrodynamics interwiki ar ... pt Indu o eletromagn tica ru simple Electromagnetic induction ... more details
File Schematic induction regulator.svg thumb Schematic of wiring an induction regulator. Power source is connected to R S T rotor terminals. Output voltage is N 1 2 3 terminals. File Diagram induction regulator.svg thumb Diagram of electrical phasor s for an induction regulator An Induction regulator is a device, based on an inductionmotor , which can provide a continuous Analogue electronics analogue variable output voltage . In the past, it was utilized to control the voltage of electric networks. Nowadays, it has been replaced in this function by the Tap transformer tap transformer . Its usage is now mostly confined to electrical laboratories, electrochemical processes and arc welding . With minor variations, its setup can be utilized as an isolator Quadrature booster phase shifting power transformer . Construction It can be regarded as a wound inductionmotor utilized in pure electrical applications in comparison to the standard one which is electro mechanical. Hence, the rotor does not normally turn, although it can be mechanically shifted by means of a worm gear . The rest of its constitution follows exactly a wound rotor inductionmotor as slotted three phase stator wound three phase rotor, ends connected to accessible slip ring s plus common point neutral Depending on the application, the ratio of number of turns between rotor stator can vary. Working If the rotor terminals are connected to a three phase electric power network, a rotating magnetic field will be driven into the magnetic core . The resulting flux will produce an emf on the windings of the stator with the particularity that if rotor and stator are physically shifted by an angle , then the electric phase shifting of both windings is too. Considering just the fundamental harmonic, and ignoring the shifting ..., induction regulators are expensive, with lower efficiency, high open circuit currents due to the airgap and limited in voltage to less than 20kV. Applications An induction regulator for power networks ... more details
Magnetic induction may refer to one of the following Electromagnetic induction Magnetic field B is sometimes called magnetic induction disambig hr magnetska indukcija ... more details
to melt steel, and the motor generator was developed to provide the power required for the induction ... to develop the first surface hardening induction heating systems using motor generators ...Induction hardening is a form of heat treatment in which a metal part is heated by induction heating ... materials science hardness and brittleness of the part. Induction hardening is used to selectively ... rudnev39 Rudnev, p. 39. ref Process Induction heating is a non contact heating process which utilises the principle of Electromagnetism electromagnetic induction to produce heat inside the surface ..., induction hardening is one of the most widely employed to improve component wikt durability ... Fatigue material fatigue life and wear resistance . ref Rudnev, p. 59. ref Induction surface ... which require high wear resistance. Wear resistance behavior of induction hardened parts depends ... layer. ref name rudnev58 History The basis of all induction heating systems was discovered in 1831 ... coil was said to be induced and so Faraday s law of induction was born. Once discovered ... s and electric motor s, which are variants of the same thing and in forms of electrical transformer ... and utilisation of the induction hardening process and by the late 1950s many systems utilising motor generators and thermionic emission triode oscillators were in regular use in a vast array of industries. Modern day induction heating units utilise the latest in semiconductor technology ... In traverse hardening systems the work piece is passed through the induction coil progressively and a following ... of hardness and the hardness value achieved. Equipment Power required Power supplies for induction ... techniques, however as with all such methods a thorough working knowledge of the induction .... Frequency Induction heating systems for hardening are available in a variety of different ... experience and practicality. See also Case hardening Induction forging Induction heater Induction ... more details
About a specific type of transformer the more general electrical component Inductor An induction coil ... Callan and others, the induction coil was the first type of transformer. They were widely used in x ... to demonstrate Faraday s law of inductioninduction . The term induction coil is also used for a coil ... in the interior of the coil, in induction heating or zone melting equipment. File Induktionsapparat hg.jpg thumb 270px Antique induction coil used in schools, Bremerhaven, Germany How it works File Induction coil cutaway.png thumb 270px Induction coil showing construction, from 1920. An induction ... across the secondary terminals through electromagnetic induction . Because of the large number ... the secondary s output terminals. For this reason, induction coils were called spark coils. The size of induction coils was usually specified by the length of spark it could produce an 8 inch 20 cm induction coil was one that could produce an 8 inch arc. The interrupter Image Induction coil waveforms.svg thumb left Waveforms in the induction coil, demonstrating how the interrupter ..., the DC supply current must be broken repeatedly to create the magnetic field changes needed for induction. Induction coils use a magnetically activated vibrating arm called an interrupter or break to rapidly ... voltages. So the output waveform of an induction coil is a series of alternating positive and negative .... Mercury and electrolytic interrupters Although modern induction coils used for educational purposes ... the large induction coils used in spark gap transmitter spark gap radio transmitters and x ray ... of Induction Coils year 1908 publisher Munn & Co. location New York url http books.google.com ?id ... these were often driven by a separate electromagnet or motor. The largest coils used either electrolytic ... Image Callan s first induction coil.jpg thumb upright 0.66 Callan s first induction coil. Michael Faraday discovered the principle of induction, Faraday s induction law , in 1831 and did the first ... more details
In mathematics , math in math induction epsilon induction is a variant of transfinite induction , which can be used in axiomatic set theory set theory to prove that all Set mathematics sets satisfy a given property P x . If the truth of the property for x follows from its truth for all elements of x , for every set x , then the property is true of all sets. In symbols math forall x Big forall y y in x rightarrow P y rightarrow P x Big rightarrow forall x , P x math This principle, sometimes called the axiom of induction in set theory , is equivalent to the axiom of regularity . math in math induction is a special case of well founded relation Induction and recursion well founded induction . The name is most often pronounced epsilon induction , because the set membership symbol math in math historically developed from the Greek letter math epsilon math . Category Mathematical induction Category Wellfoundedness settheory stub ... more details
Natural induction can refer to Mathematical induction Natural induction labor disambig Short pages monitor This long comment was added to the page to prevent it from being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Long comment. Please do not remove the monitor template without removing the comment as well. ... more details
Induction is used to refer to a period during which a Newly Qualified Teacher in England or Wales is both ... requiring new teachers to serve a period of induction. ref name act Cite web url http www.opsi.gov.uk ... Blunkett introduced an induction period under The Education Induction Arrangements for School Teachers ... Induction Arrangements for School Teachers England Regulations 1999 SI 1999 1065 accessdate ... that all teachers complete an induction period equivalent to one year upon qualification as a teacher ... s must satisfactorily complete a period of induction. During this period, a newly qualified teacher ... or she is meeting the required induction standards. Standards Having achieved Qualified Teacher Status ..., they must meet the 6 criteria set out in the induction standards Seek and use opportunities ... in which they are completing induction, liaise with, deploy, and guide the work of other adults who ... support from an induction tutor a named induction contact at a Local Education Authority or other body Assessment In addition, all teachers undergoing a programme of induction are subject to assessment ... of the induction period to ascertain whether the required standards have been met. Restrictions Induction can only be completed in a restricted range of school types. Similarly, teachers who have not completed, and are not completing, induction can only be employed in such school types under special circumstances Completing inductionInduction can only be completed in eligible schools in the United ... Schools Council Teacher Induction Panel , or a sixth form college under certain circumstances. Teachers not completing induction Teachers who have not completed a period of induction are limited in the work ... for at least one term, he or she must be offered, and must undertake, a programme of induction lasting throughout that period. Teachers who have not completed a period of induction can only work in eligible ... from the relevant Local Education Authority . Teachers who have not completed a period of induction ... more details
Inline date July 2009 Induction brazing is when two or more materials are joined together by a filler metal that has a lower melting point than the base materials using induction heating . In induction ... by the alternating current from an induction coil . Materials and applications Induction brazing is suitable ... about filler metals Silver is frequently used for induction brazing because of its low melting point ... to Turnkey Induction Heating Solutions There are very specific reasons to use induction heating for industrial .... Selective heating Induction heating can be targeted to provide heat to very small areas within tight ... areas of the same part Better quality joints Induction heating produces clean, leak proof joints ... joints is one of the reasons that induction brazing is being used extensively for high ... size, poor efficiency and lack of quality control. Brazing with induction reduces both oxidation ... cycles Because the induction heating cycle is very short in comparison to flame brazing, more parts .... An induction brazing system quickly delivers highly localized heat to minimize part warpage and distortion ... improve overall part quality and eliminate costly part cleaning procedures Induction Atmospheres, 1 . Consistent results Induction brazing is a very repeatable process because variables such as time ... improve consistency and maximize productivity. For the most part, induction brazing and soldering ... to keep the parts completely clean and free of oxidation. Induction brazing generally works best with two pieces of similar metal. Dissimilar metals can also be joined by induction heating but they require ... According to Turnkey Induction Heating Solutions class wikitable Process Time Temperature F ... kssbd001.html Induction brazing . Retrieved April 19, 2008, from TWI Centre For Materials Joining http www.inductionatmospheres.com brazing induction brazing.html Atmospheres, I Induction Brazing . Retrieved April 24, 2008, from Turnkey Induction Heating Solutions External links http www.ambrell.com ... more details
of Stirling radioisotope generator is heated by induction during testing Image removed unnecessary logo placement, appeared to be advertisement Image Psih.jpg 500px thumb Various applications of induction heating. Induction heating is the process of heating an electrically conducting object usually a metal by electromagnetic induction , where eddy current s also called Foucault currents are generated within the metal and resistance leads to Joule heating of the metal. An induction heater for any ... depth. Applications Image Induction heating of bar.jpg 300px thumb Induction heating of 25 mm metal bar using 15 kW at 450 kHz. Induction heating allows the targeted heating of an applicable ... to fit. Iron and its steel alloys respond best to induction heating, due to their ferromagnetic nature ... in any magnetic material. Induction heating has been used to heat liquid conductors such as molten metals and also gaseous conductors such as a gas plasma see Induction plasma technology . Induction heating ..., 50 60 Hz induction heating is used for many lower cost industrial applications as inverters are not required. Induction furnace An induction furnace uses induction to heat metal to its melting ... is useful in ensuring that alloy alloying additions are fully mixed into the melt. Most induction .... Induction furnaces are used in most modern foundries as a cleaner method of melting metals than ... tonnes capacity. Induction furnaces often emit a high pitched whine or hum when they are running ... or inert atmosphere. Vacuum furnaces make use of induction heating for the production of specialty steels and other alloys that would oxidize if heated in the presence of air. Induction welding A similar, smaller scale process is used for induction welding . Plastics may also be welded by induction ... the open seam, heating it. Induction cooking In induction cooking , an induction coil in the cook top ... heat conduction conduction . Benefits of induction cookers include efficiency, safety the induction ... more details
Induction welding is a form of welding that uses electromagnetic induction to heat the workpiece. The welding apparatus contains an induction coil that is energised with a radio frequency electric current . This generates a high frequency electromagnetic field that acts on either an electrical conduction electrically conductive or a ferromagnetism ferromagnetic workpiece. In an electrically conductive workpiece, the main heating effect is electrical resistance resistive heating, which is due to induced currents called eddy current s. In a ferromagnetic workpiece, the heating is caused mainly by hysteresis , as the electromagnetic field repeatedly distorts the magnetic domains of the ferromagnetic material. In practice, most materials undergo a combination of these two effects. Nonmagnetic materials and electrical insulators such as plastic s can be induction welded by implanting them with metallic or ferromagnetic compounds, called susceptor s, that absorb the electromagnetic energy from the induction coil, become hot, and lose their heat to the surrounding material by thermal conduction . Induction welding is used for long production runs and is a highly automated process, usually used for welding the seams of pipes. It can be a very fast process, as a lot of power can be transferred to a localised area, so the faying surfaces melt very quickly and can be pressed together to form a continuous rolling weld . The skin depth depth that the current, and therefore heating, penetrates from the surface is inversely proportional to the square root of the frequency. The temperature of the metals being welded and their composition will also affect the penetration depth. This process is very similar to resistance welding , except that in the case of resistance welding the current is delivered using contacts to the workpiece instead of using induction. See also Induction heating ... first2 Peter title Induction Heating Handbook publisher McGraw Hill year 1979 url http books.google.com ... more details
COI date August 2010 Induction is the support and guidance provided to novice teacher s and school administrators in the early stages of their careers. Induction encompasses orientation to the workplace, socialization, mentoring , and guidance through beginning teacher practice. Comprehensive, high quality induction consists of several key elements a multi year program rigorous mentor selection and training subject area pairing of mentors and beginning educators sufficient time for mentors to meet with and observe new educators formative assessment that assists beginning educators to advance along a continuum of professional growth. The New Teacher Center induction model is nationally recognized in the United States for its promotion of new educator development and its impact on teacher retention and student learning. References Alliance for Excellent Education, Tapping The Potential Retaining and Developing High Quality New Teachers , 2005. http www.all4ed.org publications TappingThePotential index.html American Association of State Colleges and Universities , Teacher Induction Programs Trends and Opportunities, 2006. http www.aascu.org policy matters pdf v3n10.pdf Ellen Moir Moir, Ellen , Launching The Next Generation of Teachers Through Quality Induction, National Commission on Teaching ... and America s Future, Induction into Learning Communities, 2005. http www.nctaf.org documents NCTAF Induction Paper 2005.pdf New Teacher Center at UC Santa Cruz, Does New Teacher Support Affect ..., Thomas M., How Do State Level Induction and Standards Based Reform Policies Affect Induction Experiences ... 309. Smith, Thomas M. and Ingersoll, Richard M. What Are the Effects of Induction and Mentoring on Beginning ... faculty research Effects of Induction and Mentoring RMI Fall 2004.doc Portner, H. Ed. . 2005 . Teacher mentoring and induction The state of the art and beyond. Thousand Oaks, CA Corwin. DEFAULTSORT Teacher Induction Category Education reform Category Teacher training ... more details
include much of the general company information delivered to employees. Benefits of an induction programme An induction programme is an important process for bringing staff into an organisation .... As a priority the induction programme must cover any legal and compliance regulation compliance ... employee. An induction programme is part of an organisations knowledge management process and is intended ... of the company. Good induction programmes can increase productivity and reduce short term ... of new employees . http urn.kb.se resolve?urn urn nbn se his diva 4281 ref . A typical induction programme A typical induction programme will include at least some of the following any legal requirements ... benefit the company and employee, the induction programme should be planning planned in advance. A timetable should be prepared, detailing the induction activities for a set period of time ideally ... for each activity. This plan should be circulated to everyone involved in the induction process, including ... starter will not be working with directly, but who can undertake some of the tasks on the induction ..., assimilating and accelerating new employees Induction teachers for induction of teachers in England ...?articleid 892 ACAS article Recruitment, selection and induction Alvenfors, Adam 2010 Introduction Integration ... more details
File Sigmoid curve for an autocatalytical reaction.jpg 230px thumb right A sigmoid curve of an autocatalytic reaction. When t 0 to 50, the rate of reaction is low. Thereafter, the reaction accelerates, until almost all reactants have been consumed. At that point, the reaction rate tapers off. An induction period in chemical kinetics is an initial slow stage of a chemical reaction after the induction period, the reaction accelerates. ref GoldBookRef title induction period file I03019 ref Ignoring induction periods can lead to runaway reaction s. In some catalytic reactions, a pre catalyst needs to undergo a transformation to form the active catalyst, before the catalyst can take effect. Time is required for this transformation, hence the induction period. For example, with Wilkinson s catalyst , one triphenylphosphine ligand must dissociate to give the coordinatively unsaturated 14 electron species which can participate in the catalytic cycle File RevisedCatCycle.png 300px thumb left Wilkinson s catalyst requires activation before it can participate in the catalytic cycle br clear left Similarly, for an autocatalytic reaction , where one of the reaction products catalyzes the reaction itself, the rate of reaction is low initially until sufficient products have formed to catalyze the reaction. Reactions generally accelerate when heat is applied. Where a reaction is exothermic , the rate of the reaction may initially be low. As the reaction proceeds, heat is generated, and the rate of reaction increases. This type of reaction often exhibits an induction period as well. Grignard reagents are notorious for having induction periods. This is usually due to two reasons Firstly, the thin film of oxide on the magnesium reagent must be removed before the bulk magnesium can react. Secondly, Grignard reactions, while exothermic, are typically conducted at low temperature for better selectivity. For these two reasons, Grignard reactions often can have a long induction period, fol ... more details
refimprove date November 2010 An induction furnace is an electrical furnace in which the heat is applied by induction heating of metal . The advantage of the induction furnace is a clean, energy efficient and well controllable melting process compared to most other means of metal melting. Most modern foundries use this type of furnace and now also more iron foundries are replacing blast furnace cupolas with induction furnaces to melt cast iron , as the former emit lots of dust and other pollutant s. Induction furnace capacities range from less than one kilogram to one hundred tonnes capacity and are used to melt iron and steel , copper , aluminium and precious metals . Since no arc or combustion is used, the temperature of the material is no higher than required to melt it this can prevent loss of valuable alloying elements. ref Phillip F. Ostwald, Jairo Mu oz, Manufacturing Processes and Systems 9th Edition , John Wiley & Sons, 1997 ISBN 978 0 471 04741 4 page 48 ref The one major drawback to induction furnace usage in a foundry is the lack of refining capacity charge materials must ... respectively. An operating induction furnace usually emits a hum or whine due to fluctuating magnetic ... harv chapter V Coreless Induction Furnaces pages 153 252 ref metal is placed in a crucible surrounded by a water cooled alternating current solenoid coil . A channel type induction furnace has a loop ... 1935 Chapter IV Channel Type or Low Frequency Induction Furnaces , pp. 153 252 ref ref Cite book title Induction and Dielectric Heating year 1962 publisher British Electrical Development Association series Electricity and Productivity Series, N 6 ref Induction and Dielectric Heating pages ...&sa X&oi book result&ct result&resnum 1&ved 0CDIQ6AEwAA v onepage&q&f true How Induction Furnace Are Making ... illustrations DEFAULTSORT Induction Furnace Category Industrial furnaces Category Induction heating Furnace, Induction de Induktionsofen es Horno de inducci n hi hr Elektrolu na pe ... more details
Rule induction is an area of machine learning in which formal rules are extracted from a set of observations. The rules extracted may represent a full scientific model of the data, or merely represent local patterns in the data. Paradigms Some major rule induction paradigms are Association rule algorithms e.g., Aggrawal Decision rule algorithms e.g., Quinlan 1987 Hypothesis testing algorithms e.g., RULEX Horn clause induction Version spaces Rough set rules Inductive Logic Programming Boolean decomposition Feldman Algorithms Some rule induction algorithms are Charade Rulex PROGOL Progol CN2 algorithm CN2 References cite conference first J. R. last Quinlan title Generating production rules from decision trees booktitle Proceedings of the Tenth International Joint Conference on Artificial Intelligence IJCAI 87 pages 304 307 date 1987 location Milan, Italy editor McDermott, John Category Machine learning Category Inductive reasoning Comp sci stub ... more details
In logic , an enumerative induction is an argument of the type simple inductive schema. Induction by simple enumeration is no proof of causality . It only suggests a potential causal relation between two items. Francis Bacon wrote in The Advancement of Learning The induction that proceeds by simple enumeration is childish. Form Image John Quiggin enumerative induction.png thumb left 350px An example of an enumerative induction criticising the reportage on global warming in The Australian newspaper. The argument appeared on John Quiggin John Quiggin s blog ref John Quiggin, http johnquiggin.com index.php archives 2006 09 04 the oz blows it again on global warming The OZ blows it again on global warming Accessed 9 Sep 2006 ref In the represented occurrence of this argument pattern, the author leaves and so on as an inference objection assumed co premise , which is why it does not appear in the image. See also Mill s methods References div class references small references div philo stub Category Arguments Category Inductive reasoning ... more details
Multiple issues unreferenced December 2009 cleanup November 2010 orphan December 2009 Physiological process in the plant by which the meristem shoot apical meristem becomes competent to develop flowers. Biochemical changes at the apex, particularly those caused by cytokinins , accompany this process. Usually flower induction is followed by flower differentiation , with some notable exceptions such as in kiwifruit , where the two processes are separated. Flower induction can be reversed, but flower differentiation is irreversible, because anatomical changes are in place. DEFAULTSORT Flower Induction Category Plant physiology ca Inducci floral ... more details
unreferenced date November 2006 An induction cut is the shortest possible hairstyle without head shaving shaving the head with a razor . The style is so named as it is traditionally the first haircut given to new male recruits during initial entry into many of the world s armed forces, but most particularly in the United States . The induction haircut has both practical and psychological purposes. Originally, one of the reasons for the induction haircut was to reduce the chances of disease among closely quartered recruits from different geographical areas with varying immunities , such as head lice . However, the haircut also has the psychological purpose of stripping recruits of their individuality and promoting the team mentality desirable in a platoon of military recruits. For U.S. male recruits, the induction haircut has become a sometimes dreaded symbolic rite of passage for entry into the armed forces and is usually performed within minutes or hours of arrival at boot camp. It is one of several techniques used to mentally shock recruits into adapting to their decision to become a member of the armed forces. Although all branches of the U.S. armed forces employ the tradition of the induction haircut, the U.S. Marines have adopted the most severe version a zero length clipper blade to the scalp, although not shorter to avoid any minor injuries to recruits head moles or other ... s 1 haircut . Although the term induction cut is generally used to refer to male military haircuts, females also endure a form of an induction haircut, in that their hair may be trimmed to chin length. The concept of an induction haircut has also been the focus of litigation, such as in the case ... where the hair is cut short to a consistent length all over using clippers. The induction ..., including a shaved head, the induction cut is becoming increasingly popular as an everyday ... and tight has also become popular in the L gion. DEFAULTSORT Induction Cut Categories Category Hairstyles ... more details
Induction sealing , otherwise known as cap sealing, is a non contact method of heating a metallic disk ... the container has been filled and capped. Image Hand Held induction sealer.jpg thumb A Hand Held induction sealer How it works Image AutoMate AM 250 Induction Sealer.jpg thumb Automatic Waterless Induction Sealer Image with unknown copyright status removed Image Automate Hand Induction Sealer.jpg thumb Waterless Table Top Induction Sealer Image induction sealer conveyor.jpg thumb An induction sealer ... there are various liners to choose from, a typical induction liner is multi layered. The top layer ... the cap or closure is applied, the container passes under an induction coil , which emits an oscillating electromagnetic field . As the container passes under the induction coil sealing head the conductive ... proper sizing of the induction sealing is vital to determine the exact system necessary to run a particular ... recent development which suits a small number of applications better allows for induction sealing to be used ... neck. When the foil is in place, it is pressed down by the seal head, the induction cycle is activated ... capless induction sealing. Reasons that induction sealing may be useful Image Induction sealed bottle.jpg thumb An induction sealed bottle There are a variety of reasons companies choose to use induction sealing Tamper evident Tamper evidence Leak prevention Freshness Retention Pilferage protection ... Requirements for Certain over the counter OTC Human Drug Products CPG 7132a.17 . Induction sealing ... leaving visible evidence of entry. u Seals applied by heat induction to plastic containers appear ... u blockquote Leak prevention protection File Induction Sealing Food.jpg thumb A common application ... to prevent hazardous chemicals from spilling on other shipments. Freshness Induction sealing ... of certain products. Pilferage protection Induction sealed containers help prevent the product from ... induction seals do not want the liner residue as it could potentially interfere with the product itself ... more details
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