of this term, see Pseudorandom number generator In theoretical computer science and cryptography , a pseudorandomgenerator PRG for a class of statistical test s is a deterministic algorithm deterministic procedure that maps a random seed to a longer pseudorandompseudorandom string such that no statistical test in the class can distinguish between the output of the generator and the uniform distribution .... A function G 0, 1 sup s sup 0, 1 sup n sup , where s n , is a pseudorandomgenerator against ... the stretch of the pseudorandomgenerator. Functions from the class F sub n sub are sometimes called adversaries . A pseudorandomgenerator against a family of adversaries F F sub n sub with bias ... G sub n sub is a pseudorandomgenerator against F sub n sub with bias n . In most applications ... generator that is computable in the same or some closely related model. Pseudorandom generators in cryptography main Cryptographically secure pseudorandom number generator In cryptography , the class ... s see Pseudorandomgenerator theorem . Applications Pseudorandom generators have numerous applications ... a pseudorandomgenerator if perfect security is replaced by semantic security . Common constructions ... is interested in designing an efficiently computable pseudorandomgenerator against F whose seed length ... algorithm by the output of the pseudorandomgenerator and averaging the outputs produced by the algorithm as the pseudorandomgenerator is computed over all possible seeds. Pseudorandom ... is an arbitrary polynomial, the seed length of the pseudorandomgenerator is O log n and its bias is . In 1991, Noam Nisan and Avi Wigderson provided a candidate pseudorandomgenerator with these properties ... is a pseudorandomgenerator assuming that there exists a computational problem decision problem ... with a pseudorandomgenerator of seed length math O log 2 n math that fools all math O log n math ... attribution id 3460 title Pseudorandomgenerator Category Algorithmic information theory Category ... more details
In computational complexity theory and cryptography , the existence of pseudorandomgenerator s is related to the existence of one way function s through a number of theorems, collectively referred to as the pseudorandomgenerator theorem . Introduction Pseudorandomness A distribution is considered pseudorandom ... . Pseudorandom generators A function G sub l sub 0,1 sup l sup 0,1 sup m sup , where l m is a pseudorandomgenerator if G sub l sub can be computed in time polynomial in l G sub l sub x is pseudorandom, when x is uniformly random. One additional pseudorandom bit implies polynomially more pseudorandom bits It can be shown that if there is a pseudorandomgenerator G sub l sub 0,1 sup l sup 0,1 sup l 1 sup , i.e. a generator that adds only one pseudorandom bit, then for any m poly l , there is a pseudorandomgenerator G sub l sub 0,1 sup l sup 0,1 sup m sup ... and used as the seed to the first instance of G sub l sub , which is known to be a pseudorandomgenerator ... is not a pseudorandomgenerator, which is a contradiciton to the hypothesis. Q.E.D. Now, let s illustrate ... see references for detailed proofs. PRG &rarr OWF Consider a pseudorandomgenerator G sub l sub ... contradicts our assumption of G sub l sub being a pseudorandomgenerator. Q.E.D. OWF &rarr PRG For this case we prove a weaker version of the theorem One way permutation pseudorandomgenerator A one way permutation is a one way function that is also a permutation of the input bits. A pseudorandomgenerator ... by contradiction. Assume that G sub l sub is not a pseudorandomgenerator that is, there exists circuit ... 864, 1984. J. Hastad, R. Impagliazzo, L.A. Levin and M. Luby. A PseudorandomGenerator from any One ... D sub n sub is pseudorandom if for any polynomial size circuit C , and any inversely polynomial ... of the output. Repeating this process for m times yields an output of m pseudorandom bits. It can be shown that such G sub l sub , that consists of m instances of G sub l sub , is indeed a pseudorandom ... more details
Citation style date September 2009 A pseudorandom number generator PRNG , also known as a deterministic random bit generator DRBG , ref http csrc.nist.gov publications nistpubs 800 57 sp800 57 Part1 revised2 ... generator s, pseudorandom numbers are important in practice for their speed in number generation ... Rayleigh and Poisson distribution Poisson . See also Portal Mathematics List of pseudorandom number generators Pseudorandom binary sequence Quasi random Random number generator attack Randomness Notes ... Security DEFAULTSORT Pseudorandom Number Generator Category Pseudorandom number generators ca Generador ... algorithms include linear congruential generator s, lagged Fibonacci generator s, and linear ... of a PRNG as a truly random generator, and joked that Anyone who considers arithmetical ... 2 sup var n var sup 1. Linear congruential generator s have periods that can be calculated by factoring ... than its output this is particularly obvious with PRNGs with a 1 bit output. Most pseudorandomgenerator algorithms produce sequences which are uniform distribution discrete uniformly distributed ... the random number generator of choice for statistical simulations and generative modeling. SFMT ... 165.pdf Cryptographically secure pseudorandom number generators Main Cryptographically secure pseudorandom number generator A PRNG suitable for cryptography cryptographic applications is called a cryptographically ... has only negligible function negligible advantage cryptography advantage in distinguishing the generator ... or future values in the sequence, nor any inner state of the generator. K4 It should be impossible, for all practical purposes, for an attacker to calculate, or guess from an inner state of the generator, any previous numbers in the sequence or any previous inner generator states. For cryptographic ... Tina s Random Number Generator Library . A free BSD licenses BSD license state of the art C pseudo random number generator library for sequential and parallel Monte Carlo simulations. http www.phy.duke.edu ... more details
Cryptanalysis of the Dual Elliptic Curve PseudorandomGenerator , Berry Schoenmakers and Andrey Sidorenko, IACR ePrint 2006 190. http eprint.iacr.org 2006 321 Efficient Pseudorandom Generators Based ... of a cryptographically safe shrinking pseudorandom number generator. Interlang cryptography navbox DEFAULTSORT Cryptographically Secure Pseudorandom Number Generator Categories Category Cryptographic algorithms Category Cryptographically secure pseudorandom number generators Category Cryptographic ...A cryptographically secure pseudo random number generator CSPRNG is a pseudo random number generator PRNG with properties that make it suitable for use in cryptography . Many aspects of cryptography require random numbers, for example Key generation Cryptographic nonce Nonces One time pad s salt cryptography Salts in certain signature schemes, including ECDSA , RSASSA PSS . The quality of the randomness required for these applications varies. For example creating a Cryptographic nonce nonce in some ... be a hardware random number generator or perhaps unpredictable system processes &mdash though ... in 1982 that a generator passing the next bit test will pass all other polynomial time statistical ... speaking, are not pure pseudorandom number generators, as their output is not completely determined ... a pseudorandom stream of bits that are combined almost always XOR cipher XOR ed with the plaintext running the cipher on a counter will return a new pseudorandom stream, possibly with a longer period ... Press, 1996, http www.cacr.math.uwaterloo.ca hac about chap5.pdf Chapter 5 Pseudorandom Bits and Sequences ... designs A Statistical Test Suite for Random and Pseudorandom Number Generators , http csrc.nist.gov ... Java standard class providing a cryptographically strong pseudo random number generator PRNG . http ... A Security Analysis of the NIST SP 800 90 Elliptic Curve Random Number Generator , Daniel R. L. Brown ... ePrint 2006 321. http eprint.iacr.org 2006 086.pdf Analysis of the Linux Random Number Generator , Zvi ... more details
wiktionarypar generatorGenerator may refer to Electric generator Engine generator , an electric generator with its own engine Mathematics A member of a generating set disambiguation generating set Generator matrix , a matrix used in coding theory Computing Generator computer programming , a routine that acts like an iterator Pseudorandom number generator , a producer of random numbers Code generation compiler Code generator , part of a compiler Natural language generation Natural language generator Random test generator , used in software testing Music Generator song Generator song , a song by The Foo Fighters Generator The Holloways song Generator The Holloways song , a song by The Holloways Generator Bad Religion album Generator Bad Religion album , and the album s opening track Generator Aborym album Generator Aborym album The Generators , a 1997 punk rock band from Los Angeles Kix band , an American glam metal band also known as The Generators Generator , a song on the 1995 Elastica album The Menace Popular culture Generator Gawl , a 1998 anime series See also Generate disambiguation Code generation disambiguation disambiguation cs Gener tor de Generator Begriffskl rung fr G n rateur it Generatore hu Gener tor egy rtelm s t lap nl Generator nn Generator pl Generator pt Generator ru sk Gener tor sv Generator olika betydelser ta uk ... more details
also Maximum length sequence Pseudorandom number generator Pseudorandomness White noise References ...In cryptography , pseudorandom noise PRN ref cite web url http www.gps.gov technical icwg meetings 2011 09 13 WAS IS FINAL PRN Expansion 4May2011.pdf title Change Topic Pseudorandom Noise PRN Expansion publisher GPS.GOV accessdate 13 July 2011 ref ref cite web url http www.losangeles.af.mil library factsheets factsheet.asp?id 8618 title Pseudorandom Noise PRN Code Assignments publisher Los Angeles Air Force Base accessdate 13 July 2011 ref is a Signalling telecommunication signal similar to noise physics noise which satisfies one or more of the standard tests for statistical randomness . Although it seems to lack any definite pattern , pseudorandom noise consists of a deterministic sequence of Pulse signal processing pulses that will repeat itself after its period. ref FS1037C MS188 ref In cryptography cryptographic device s, the pseudorandom noise pattern is determined by a key cryptography key and the repetition period can be very long, even millions of digits. Pseudorandom noise is used in some synthesizer electronic musical instruments , either by itself or as an input to subtractive synthesis , and in many white noise machine s. In spread spectrum systems, the receiver correlation correlates a locally generated signal with the received signal information theory signal . Such spread spectrum systems require a set of one or more codes or sequences such that Like random noise, the local sequence has a very low correlation with any other sequence in the set, or with the same sequence at a significantly different time offset, or with narrowband interference, or with thermal ... sequence. In a direct sequence spread spectrum system, each bit in the pseudorandom ... . In a frequency hopping spread spectrum sequence, each value in the pseudorandom sequence is known ... range finding applications involve two way transmissions. A local station generates a pseudorandom ... more details
In cryptography , the term pseudorandom permutation , abbreviated PRP , refers to a function that cannot be distinguished from a random permutation that is, a permutation selected at random with uniform probability, from the family of all permutations on the function s domain with practical effort. A pseudorandom permutation family is a collection of pseudorandom permutations, where a specific permutation may be chosen using a key. The idealized abstraction of a block cipher is a truly random permutation. If a distinguishing algorithm exists that achieves significant advantage cryptography advantage with less effort than specified by the block cipher s security parameter this usually means the effort required should be about the same as a brute force search through the cipher s key space , then the cipher is considered broken at least in a certificational sense, even if such a break doesn t immediately lead to a practical security failure. See also Block cipher pseudorandom permutation families operating on fixed size blocks of bits Format Preserving Encryption pseudorandom permutation families operating on arbitrary finite sets Pseudorandom function References cite book author Mihir Bellare , Phillip Rogaway date 2005 09 20 title Introduction to Modern Cryptography url http www cse.ucsd.edu mihir cse207 classnotes.html chapter Chapter 3 Pseudorandom functions accessdate 2007 09 30 Category Theory of cryptography Category Cryptographic primitives crypto stub ... more details
Orphan date February 2009 Notability Products date August 2011 A pseudorandom encoder is an electro mechanical device used for measuring distance and finding position. It is different from the conventional absolute and incremental encoder in its disk pattern, which gives it aspects of the other two designs. The disk of a pseudorandom encoder has an evenly spaced notch design just as an incremental encoder to measure distance. A second track of code is used to find the position just like an absolute encoder however, an absolute encoder tells position from reading from multiple parallel tracks while a pseudorandom encoder uses one single track. This aspect allows pseudorandom rotary encoders to have smaller diameters and larger through holes. To know its position, the encoder must first move a certain distance to read the code. This distance is generally small, about 1 2 degrees for rotary encoders and 1 mm for linear encoders, though this idiosyncrasy does hinder its usefulness in some applications such as trackball track balls since position is not immediately known when the system starts. ref cite web url http www.virtualabsolute.com VAoverview.htm title A New Kind of Encoder virtualabsolute.com ref See also Rotary encoder References reflist Category Dimensional instruments ... more details
Let math U U n n in mathbb N math be a uniform ensemble and math X X n n in mathbb N math be an distribution ensemble ensemble . The ensemble math X math is called pseudorandom if math X math and math U math are Computationally indistinguishable indistinguishable in polynomial time . References Goldreich, Oded 2001 . Foundations of Cryptography Volume 1, Basic Tools . Cambridge University Press. ISBN 0 521 79172 3. Fragments available at the http www.wisdom.weizmann.ac.il oded frag.html author s web site . Category Algorithmic information theory Category Pseudorandomness Category Cryptography crypto stub ... more details
In cryptography , a pseudorandom function family , abbreviated PRF , is a collection of efficiently computable Function computer science functions which emulate a random oracle in the following way no efficient algorithm can distinguish with significant Advantage cryptography advantage between a function chosen randomly from the PRF family and a random oracle a function whose outputs are fixed completely at random . Pseudorandom functions are vital tools in the construction of cryptographic primitive s, especially secure encryption encryption schemes . Pseudorandom functions are not to be confused with Cryptographically secure pseudorandom number generatorpseudorandom generators PRGs . The guarantee of a PRG is that a single output appears random if the input was chosen at random. On the other hand, the guarantee of a PRF is that all its outputs appear random, regardless of how the corresponding inputs were chosen, as long as the function was drawn at random from the PRF family. A pseudorandom function family can be constructed from any pseudorandomgenerator, using, for example, the construction given by Goldreich, Shafi Goldwasser Goldwasser , and Micali. ref Oded Goldreich , Shafi Goldwasser , Silvio Micali 1986 How to Construct Random Functions , Journal of the ACM , vol.33, no.4, p.792 807. doi 10.1145 6490.6503 http theory.lcs.mit.edu cis pubs shafi 1986 jacm.pdf preprint http www.math.weizmann.ac.il oded ggm.html web page and preprint ref See also Pseudorandom permutation References references Category Theory of cryptography Category Cryptographic primitives Category Pseudorandomness de Pseudozuf llige Funktion he ... more details
A binary sequence BS is a sequence of math N math bits, math a j math for math j 0,1,...,N 1 math , i.e. math m math ones and math N m math zeros. A BS is pseudorandomness pseudo random PRBS if its autocorrelation function math C v sum j 0 N 1 a ja j v math has only two values math C v begin cases m, mbox if v equiv 0 mbox mod N mc, mbox otherwise end cases math where math c frac m 1 N 1 math is called the duty cycle of the PRBS. A PRBS is random in a sense that the value of an math a j math element is independent of the values of any of the other elements, similar to real random sequences. It is pseudo because it is deterministic and after math N math elements it starts to repeat itself, unlike real random sequences, such as sequences generated by radioactive decay or by white noise. The PRBS is more general than the n sequence , which is a special pseudo random binary sequence of n bits generated as the output of a linear shift register. An n sequence always has a 1 2 duty cycle and its number of elements math N 2 k 1 math . PRBS s are used in telecommunication , encryption , simulation , correlation technique and time of flight spectroscopy . Practical implementation Pseudorandom binary sequences can be generated using linear feedback shift register s. ref Paul H. Bardell, William H. McAnney, and Jacob Savir, Built In Test for VLSI Pseudorandom Techniques , John Wiley & Sons, New York, 1987. ref See also Pseudorandom number generator Gold code Complementary sequences Bit Error Rate Test References reflist External links http www.scriptwell.net correlation.htm Refimprove date January 2008 Category Pseudorandomness Category Binary sequences de Pseudo random bit stream pl PRBS ru uk ... more details
orphan date February 2010 In theoretical computer science a pseudorandomgenerator for low degree polynomials is an efficiently computable function whose output is indistinguishable from the uniform distribution by evaluation of low degree polynomials in the following sense. Definition A pseudorandomgenerator math G mathbb F s rightarrow mathbb F n math for polynomials of degree math d math over a Finite field F is an efficient procedure that stretches math s n math field elements into math n math field elements and fools any polynomial of degree d in n variables over F For every such polynomial p, the Total variation Total variation distance in probability theory statistical distance between the distributions math p U n math , for uniform math U n math in math mathbb F n math , and math p G U s math , for uniform math U s math in math mathbb F s math , is at most a small math epsilon math . Construction The case of linear polynomials is solved by Epsilon Biased Sample Spaces small bias spaces which give constructions with seed length math s O log n log 1 epsilon math this is optimal up to constant factors . Following the sequence of papers http www.ccs.neu.edu home viola papers gen.pdf , http shachar.lovett.googlepages.com prg poly.pdf it was established in http www.ccs.neu.edu home viola papers d.pdf that a sum of math d math small bias spaces fools degree math d math polynomials. This gives a construction with seed length math s O log n 2 d log 1 epsilon math . References http www.ccs.neu.edu home viola papers gen.pdf The paper proposed taking a sum of independent small bias spaces for fooling low degree polynomials . http shachar.lovett.googlepages.com prg poly.pdf The paper gave the first unconditional result showing that sum of math 2 d math small bias spaces fools low degree polynomials . http www.ccs.neu.edu home viola papers d.pdf The paper shows that sum of math d math small bias spaces fools low degree polynomials . Category Pseudorandomness ... more details
Unreferenced date January 2009 In cryptography , the shrinking generator is a form of pseudorandom number generator intended to be used in a stream cipher . It was published in Crypto 1993 by Don Coppersmith , Hugo Krawczyk , and Yishay Mansour . The shrinking generator uses two linear feedback shift register s. One, called the A sequence, generates output bits, while the other, called the S sequence, controls their output. Both A and S are clocked if the S bit is 1, then the A bit is output if the S bit is 0, the A bit is discarded, nothing is output, and we clock the registers again. This has the disadvantage that the generator s output rate varies irregularly, and in a way that hints at the state of S this problem can be overcome by buffering the output. Despite this simplicity, the shrinking generator has remained remarkably resistant to cryptanalysis there are currently no known attacks better than exhaustive search when the feedback polynomials are secret. An interesting variant is the self shrinking generator . An implementation of a shrinking generator in Python This example uses two Galois LFRSs to produce the output pseudorandom bitstream. The python code can be used to encrypt and decrypt a file or any bytestream. source lang python usr bin python import sys Crypto4o functions start here class glfsr def init self, polynom, initial value self.polynom polynom 1 self.data initial value tmp polynom self.mask 1 while tmp 0 if tmp & self.mask 0 tmp tmp self.mask if tmp 0 break self.mask self.mask 1 def next state self self.data self.data 1 retval 0 if self.data & self.mask 0 retval 1 self.data self.data self.polynom return retval class sprng def init self, polynom d, init value d, polynom c, init value c self.glfsr d glfsr polynom d, init value d self.glfsr c glfsr ... pseudorandom number generator. DEFAULTSORT Shrinking Generator Category Stream ciphers Category Pseudorandom ... cipher FISH , an insecure stream cipher based on the shrinking generator principle External links http ... more details
generator Generalized inversive congruential pseudorandom numbers Notes Reflist refs ref name ... f a 1 math and math f a 5 math . There are other attacks that would be very bad for a Pseudorandom Number Generator the user expects to get random numbers from the output, so of course the stream should ..., g by math mathcal I mathcal G n math , instance generator, and the random choice of the function ... math mathbf D a math be the Inversive congruential generator discrepancy of the set math f a x ... and Pseudorandomness year 1998 edition first publisher Springer isbn 978 3540647669 Category Pseudorandom ... more details
In mathematics , the term infinitesimal generator may refer to an element of the Lie algebra associated to a Lie group the Infinitesimal generator stochastic processes infinitesimal generator of a stochastic processes stochastic process the C0 semigroup Infinitesimal generator infinitesimal generator of a strongly continuous semigroup . disambig ... more details
dabconcept A steam generator is a device used to boil water to create steam. It may refer to Boiler steam generator , a closed vessel in which water is heated under pressure Supercritical steam generator or Benson boiler, a high pressure steam generator that operates in the supercritical pressure regime, such that no boiling takes place within it. Steam generator auxiliary boiler , a steam powered boiler used on ships to produce a low pressure steam, from a high pressure supply. Steam generator boiler , an oil or gas fired boiler, based on a low water content monotube coil. Steam generator nuclear power , a heat exchanger in a pressurized water nuclear reactor Steam generator railroad , a device used in trains to provide heat to passenger cars Disambig ja no Dampgenerator andre betydninger ... more details
In mathematics, the term generator function may refer to Generator computer science , a special subroutine routine that can be used to control the iteration behaviour of a control flow Loops loop . A stochastic process in probability theory . Disambig ... more details
Infobox Album See Wikipedia WikiProject Albums Name Harmonic Generator Type EP Artist The Datsuns Cover Harmonic Generator cover Datsuns .gif Genre Rock Producer The Datsuns Last album The Datsuns br 2002 This album Harmonic Generator Next album Outta Sight, Outta Mind br 2004 Harmonic Generator is a Japanese six track Extended play EP by New Zealand rock band The Datsuns . It contains radio sessions of three songs and live studio recordings of a further three see below for track listing . It also contains the music video for Harmonic Generator as an enhanced multimedia track. It is named after the guitar distortion pedal used on the track the Prunes & Custard Harmonic Generator Intermodulator manufactured by Crowther Audio. Track listing Harmonic Generator live Sittin Pretty live Fink for the man live Little Bruise O Woe is Me Freeze Sucker Harmonic Generator Enhanced track Category The Datsuns albums ... more details
Orphan date October 2008 The summation generator , created in 1985, by Rainer Rueppel, was a cryptography and security front runner in the late 1980s. It operates by taking the output of two LFSR s through an adder with carry. The operation s strength is that it is nonlinear . However, through the early 1990s various attacks against the summation generator eventually led to its fall to a correlation attack. In 1995 Klapper and Goresky were able to determine the summation generator s sequence in only 2 sup 19 sup bits. An improved summation generator with 2 bit memory was then proposed by cryptographers Lee and Moon. In the new generator scheme an extra bit of memory is added to the nonlinear combining Function mathematics function . The objective in the modification was to make the summation generator immune to correlation attack . An attack against the improved summation generator was reported by Mex Perera and Shepherd in 2002 by exploting linear relations. Besides, in June 2005 an algebraic attack was developed. Using this attack a PC can calculate the initial state of the summation generator within 3 minutes even with 256 bit LFSR s References R. A. Rueppel, Correlation immunity and the Summation Generator, Advances in Cryptography EUROCRYPT 85 proceedings, Berlin Springer Verlag, 1986, pp. 260 272. W.Meier and O. Staffelbach, Correlation properties of Combiners with Memory in Stream Ciphers, Advances in Cryptography EUROCRYPT 90 proceedings, Berlin Springer Verlag, 1991, pp. 204 213. Bruce Schneir, Applied Cryptography, pg. 364, Summation Generator Mex Perera, J. C. and Shepherd, S. J. 2002. Cryptanalysis of a summation generator with 2 bit memory . Signal Process. 82, 12 Dec. 2002 , 2025 2028. An algebraic attack on the improved summation generator with 2 bit memory Information Processing Letters, Volume 93 , Issue 1, January 2005 Pages 43 46 ISSN 0020 0190 External ... Generator http ciphersbyritter.com RES COMBCORR.HTM The story of combiner correlation http ... more details
are used to generate steam which drives another turbo generator. History Deleted image removed Image Blathy turbo generator.jpg thumb 300px The first Turbo generator Designed by the Hungarian engineer ... generator was invented by a Hungary Hungarian engineer Ott Bl thy . Citation needed date September ... systems. Hydrogen cooled turbo generator Main Hydrogen cooled turbo generator Based on the air cooled turbo generator, gaseous hydrogen went into service as a coolant in the rotor and sometimes the stator of hydrogen cooled turbo generator s in 1937 at Dayton, Ohio , in October by the Dayton ... can be manufactured on site by electrolysis . The generator is hermetically sealed to prevent ... Small Turbo generator for DG & Hybrids http www.srdrives.com turbo generator.shtml Turbo generator integrated http www.turbo electric.com DecoupledTurbine.html Patent for a decoupled turbine generator for electric car DEFAULTSORT Turbo Generator Category Electric power Category Turbines Category Steam ... more details
unreferenced date January 2011 mergeto Excitation magnetic date September 2011 A shunt generator is a method of generating electricity in which field winding and Armature electrical engineering armature winding are connected in parallel, and in which the armature supplies both the load current and the field current. A direct current DC generator, not using a permanent magnet, requires a DC field current. The field may be separately excited by a source of DC, or may be connected to the armature of the generator so that the generator also provides the energy required for the field current. A shunt field and any series resistor used for adjustment may be directly connected across the armature terminals in parallel with the load. Where the machine has a series compounding winding, the field may be connected at the armature side short shunt or load side long shunt . The different connections give different voltage regulation characteristics on load. Current in the field windings of a shunt wound generator is approximately independent of the load current, because currents in parallel branches are independent of each other. Since field current, and therefore field strength, is not affected by load current, the output voltage remains more nearly constant than does the output voltage of the series wound generator. There will be armature voltage drop on load, which will be reflected in the voltage applied to the shunt field. The output voltage in a dc shunt wound generator drops as load current increases because of the voltage drop across the armature resistance increases E IR . In a series wound generator, output voltage varies directly with load current. In the shunt wound generator, output voltage varies inversely with load current. A combination of the two types can overcome the disadvantages of both. This combination of windings is called the compound wound dc generator. See also Dynamo DC motor Excitation magnetic Category Electrical generators engineering stub ... more details
refimprove date June 2011 image FEMA 40330 Photograph by Ashley Andujar taken on 03 26 2009 in Puerto Rico.jpg thumb right Standby generators A standby generator is a back up electrical system that operates automatically. ref name Hickey02 Robert B. Hickey Electrical Construction Databook , McGraw Hill, 2002 ISBN 0 07 137349 7, Chapter 14 ref Within seconds of a utility Power outage outage an automatic transfer switch senses the power loss, commands the generator to start and then transfers the electrical load to the Electrical generator generator . The standby generator begins supplying power to the Electrical network circuits . After utility power returns, the automatic transfer switch transfers the electrical load back to the utility and signals the standby generator to shut off. It then returns to standby mode where it awaits the next outage. To ensure a proper response to an outage, a standby generator runs weekly self tests. Most units run on diesel fuel diesel , natural gas or propane liquid propane gas . Automatic standby generator systems may be required by building code s for critical safety systems such as elevators in high rise buildings, fire protection systems, standby lighting, or medical and life support equipment. Residential standby generators are increasingly common, providing backup electrical power to HVAC systems, security systems, and household applicances such as refrigerators, stoves, and hot water heaters. References reflist External links http www.popularmechanics.com science 4281042 Popular Mechanics How to Buy the Right Backup Generator for Your Disaster & Budget Category Power station technology ... more details
Unreferenced date November 2009 Help Generator is a Windows based help authoring tool published by AGORA Software BV, a company based in The Netherlands. The Help Generator software consists of a http www.helpgenerator.com help editor.htm help authoring IDE , a http www.helpgenerator.com help capture.htm topic page generator which can be used to generate pages from the user interface of any Windows application and http www.helpgenerator.com help generator.htm Help Generator add ins . The Help Generator add ins generate help project and topic pages including sections and screenshots by scanning the applications code sources and designers. The topic pages are automatically linked to the application s forms. The user subsequently adds texts with the included Help Editor. Output is Microsoft Compiled HTML Help , http helpgenerator.com help Browser Based Help.htm browser based help and documentation in MS Word. Help Generator add ins are available for the following software platforms http helpgenerator.com help and documentation for visual studio net applications.htm Visual Studio.NET 2005, 2008 and 2010 http helpgenerator.com help and documentation for microsoft access.htm Microsoft Access http helpgenerator.com help and documentation for visual basic 6 applications.htm Visual Basic 6 External links Official website http www.helpgenerator.com Category Technical communication tools ... more details
About the Foo Fighters song the Holloways song Generator The Holloways song the Bad Religion song Generator Bad Religion album Infobox single Name Generator Cover foo fighters generator.png Artist Foo Fighters from Album There Is Nothing Left to Lose Released March 6, 2000 Europe br April 24, 2000 Australia Format Compact Disc CD Recorded 1999 Genre Alternative rock Length 3 49 Label Roswell, RCA Records RCA Producer Last single Stacked Actors br 2000 This single Generator br 2000 Next single Breakout Foo Fighters song Breakout br 2000 Generator is a Foo Fighters band Foo Fighters song, released as a single in 2000 from their third album There Is Nothing Left to Lose . The single was only released in Australia and also released as a limited edition single in Europe. ref http www.discogs.com Foo Fighters Generator master 62153 ref The song is particularly unique among the band s work because of Dave Grohl s implementation of the talk box in parts of the song. The usage of the device was partly inspired by Grohl s admiration of Peter Frampton and Joe Walsh , both of whom helped popularize it in the 1970s. Dave Grohl has said that the song reminds him of his arrest on the Gold Coast, Australia. No video was filmed for the single. Instead a live performance of the song in Australia was overdubbed ... C. Wilson. The music video for Breakout Foo Fighters song Breakout features the song Generator .... Generator Learn to Fly Live 24 January 2000 Sydney, Australia Stacked Actors Live 24 January 2000 ... and photos. Generator Ain t It the Life Live acoustic version Floaty Live acoustic version Fraternity ... track that appears as track 4 on the Australian release . 7 inch Generator Fraternity Music video The music video for Generator is a performance at The Chapel with the studio track dubbed ... reflist Foo Fighters DEFAULTSORT Generator Song Category 2000 singles Category Foo Fighters songs ... songs es Generator canci n fr Generator chanson pl Generator singel pt Generator can o fi Generator ... more details
File Engine Generator Cart.jpg thumb Cart mounted engine generator being used at a construction site An engine generator is the combination of an electrical generator and an engine prime mover locomotive ... an engine generator set or a gen set . In many contexts, the engine is taken for granted and the combined unit is simply called a generator . Components In addition to the engine and generator, engine generators generally include a fuel supply, a constant engine speed regulator governor and a generator ... and connect it to the generator. Types File NagoldAggregat.jpg thumb right MAN diesel stationary engine and generator, now on outdoor museum display Engine generators are available in a wide range ... used in some hybrid electric bus es. The generator volt voltage volts , frequency Hz and electric ... heat and power installations. There are only a few wikt portable portable three phase generator ... generator The mid size stationary engine generator pictured here is a 100 Volt ampere kVA set ... generator sets operated at their peak efficiency point can produce between 3 and 4 kilowatthours of electrical ... Image Hand generator.jpg Hand driven electric generator for a radio station Dubendorf museum of military aviation Image Military engine generator.jpg Swiss Engine generator for a radio station Dubendorf museum of military aviation . The generator worked only when sending a radio signal the receiver could operate on battery power Image Big boy.jpg Side view of a large Perkins diesel generator, manufactured by FG Wilson Engineering Ltd. This is a 100 Volt ampere kVA set. Image Generator control panel.jpg Control panel on 100 kVA Aggreko generator set Image BronsV8.jpg Emergency power Electrical generatorgenerator in a drinking water pumping station. Brons engine with Heemaf generator. Image ElectricalGeneratorGasoline.JPG Another generator, powered by fossil fuels and used at a construction site. Image Generator.jpg An engine generator. Image Portable electrical generator angle.jpg ... more details
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