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Encyclopedia results for Spreading activation

Spreading activation





Encyclopedia results for Spreading activation

  1. Spreading activation

    Spreading activation is a method for searching associative networks, neural network s, or semantic network ... network with weights or activation and then iteratively propagating or spreading that activation out to other nodes linked to the source nodes. Most often these weights are real values that decay as activation ... to as marker passing. Activation may originate from alternate paths, identified by distinct markers, and terminate when two alternate paths reach the same node. Spreading activation models are used in cognitive psychology ref name collins Collins, Allan M. Loftus, Elizabeth F., A spreading activation .... http act r.psy.cmu.edu publications pubinfo.php?id 66 A spreading activation theory of memory. Journal of Verbal Learning and Verbal Behavior , 1983 ref to model the fan out effect. Spreading activation can also be applied in information retrieval , ref name preece S. Preece, A spreading activation .... ref ref name crestani Fabio Crestani. Application of Spreading Activation Techniques in Information ... Boosting item keyword search with spreading activation Aswath, D. Ahmed, S.T. Dapos cunha, J. Davulcu ... on the next spreading activation cycle. If activation originates from more than one node, a variation ... is exceeded. See also Connectionism Examples Image Spreading activation graph 1.png thumb center 400px In this example, spreading activation originated at node 1 which has an initial activation ... of spreading activation have occurred. Color hue and saturation indicate different activation values ... of marker passing algorithms based on spreading activation theory. http texai.org Texai An open source project to create artificial intelligence that provides a Java spreading activation class library. DEFAULTSORT Spreading Activation Category Semantics Category Psycholinguistics Category Memory ... 1...N each having an associated activation value A i which is a real number in the range 0.0 ... 1.0 ... setting all activation values A i to zero. Set one or more origin nodes to an initial activation value ...   more details



  1. Activation

    about a requirement for a chemical reaction a step in a software installation process Product activation the calling of a subroutine Subroutine Activation in bio chemical science s generally refers to the Process science process whereby something is prepared or excited for a subsequent reaction . Chemistry In chemistry , activation of molecule s is where the molecules enter a state that avails for a chemical reaction to occur. The phrase activation energy energy of activation ref http chemed.chem.purdue.edu genchem topicreview bp ch22 activate.html The Activation Energy of Chemical Reactions Bot generated title ref refers to the Energy chemistry energy the reactant s must acquire before they can successfully react with each other to produce the Product chemistry products , that is, to reach the transition state . The energy needed for activation can be quite small and the molecules may have enough energy just from thermal fluctuations the molecules naturally have i.e. lots of reactions ... kinetics . Biology Biochemistry In biochemistry , activation, specifically called bioactivation ... active. Immunology Main Immunologic activation In immunology , activation is the transition of leucocytes ... in the reverse direction. This balance is tightly regulated, since a too small degree of activation causes susceptibility to infections, while, on the other hand, a too large degree of activation causes autoimmune diseases . Activation and deactivation results from a variety of factors, including ... , adhesion molecules , bacterial products and viral products. Physics Similarly, neutron activation ... and energy of the emitted particles. Prompt gamma neutron activation analysis Prompt Gamma Neutron Activation Analysis PGNAA is a rapid, nondestructive, instrumental, nuclear technique which is used for trace and major component analysis of various elements. Electrophysiology Activation refers ... references SIA Category Chemical kinetics da Aktivering de Aktivierung fr Activation nl Activering ...   more details



  1. Spreading the Disease

    Infobox album See Wikipedia WikiProject Albums Name Spreading the Disease Type Studio album Artist Anthrax band Anthrax Cover Spreading The Disease.jpg Released October 30, 1985 Recorded 1985 Genre Thrash metal , speed metal Length 43 40 Label Megaforce Records , Island Records Producer Carl Canedy, Anthrax Last album Fistful of Metal br 1984 This album Spreading the Disease br 1985 Next album Among the Living br 1987 Misc Singles Name Spreading the Disease Type Studio single 1 Madhouse song Madhouse single 1 date startdate 1986 ref http www.metal archives.com albums Anthrax Madhouse 10027 ref Album ratings rev1 Allmusic rev1Score Rating 4 5 ref cite web url http www.allmusic.com album spreading the disease r2376224 title Anthrax Spreading the Disease review accessdate 2011 08 31 last Huey first Steve work Allmusic publisher Rovi Corporation ref rev2 Kerrang rev2Score Rating 4.5 5 ref cite book last1 Johnson first1 Howard title Kerrang chapter Germ Warfare volume 106 publisher Morgan Grampian date 1 November 1985 location London, UK pages 21 accessdate 2011 05 08 ref rev3 Sputnikmusic rev3Score 4.0 5 ref cite web url http www.sputnikmusic.com review 9707 Anthrax Spreading the Disease title Anthrax Spreading the Disease staff review author Mike Stagno accessdate 2011 07 13 ref noprose yes Spreading the Disease is the second studio album by the American Heavy metal music heavy metal band Anthrax band Anthrax . It was released on October 30, 1985 through Megaforce Records Megaforce ... bass , backing vocals Charlie Benante drums References reflist Anthrax DEFAULTSORT Spreading The Disease ... albums Category Megaforce Records albums bg Spreading the Disease ca Spreading the Disease de Spreading the Disease es Spreading the Disease fr Spreading the Disease it Spreading the Disease pl Spreading the Disease pt Spreading the Disease ro Spreading the Disease ru Spreading the Disease fi Spreading the Disease sv Spreading the Disease ...   more details



  1. Effluent spreading

    Effluent spreading is a process in which a slurry of effluent from a dairy farm s Dairy Farming Milking parlors milking parlor is pumped and spread on pasture. Commonly a Irrigation Sprinkler rotating sprinkler is used. Dairy manure contains ammonium NH4 N. In New Zealand the application of effluent is a permitted activity, although spreading in excess is an environmental hazard. agri stub Category Organic fertilizers ...   more details



  1. The Spreading Dawn

    infobox film name The Spreading Dawn image imagesize caption director Laurence Trimble producer Samuel Goldwyn writer Basil King short story The Spreading Dawn starring Jane Cowl cinematography Phil Rosen editing distributor Goldwyn Pictures released October 21, 1917 runtime 5 reels country Film US language Silent film English intertitles The Spreading Dawn is a 1917 silent film drama produced by Samuel Goldwyn in his first year of producing independently in his own studio and starring Broadway stage star Jane Cowl in her second and final silent. It was directed by Laurence Trimble , the then husband of Cowl s stage writing partner Jane Murfin . The film is lost film lost . ref The American Film Institute Catalog Feature Films 1911 20 by The American Film Institute, c.1988 ref This film was based on a short fiction The Spreading Dawn by Basil King . Cast Jane Cowl Patricia Mercer Vanderpyl Orme Caldara Anthony Vanderpyl Harry Spingler Bentley Vanderpyl billed Harry Springer Florence Billings Mrs. Cornelia Le Roy Henry Stephenson Mr. LeRoy billed Harry Stephenson Alice Chapin Mrs. Mercer Helen Blair Young Lizzie Cecil Owen Colonel Lee Mabel Ballin Georgina Vanderpyl Edmund Lowe Captain Lewis Nugent Edith McAlpin Old Lizzie uncredited Antoinette Erwin Lettie Ford Charles Hammond Marion Knapp References reflist External links http www.imdb.com title tt0008622 The Spreading Dawn at IMDB.com http www.allrovi.com search movies the spreading dawn The Spreading Dawn allrovi synopsis http www.geh.org ar strip64 htmlsrc2 m198701190022 ful.html lantern slide feature Jane Cowl and Orme Caldara likenesses DEFAULTSORT Spreding Dawn, The Category 1917 films Category American silent feature films Category Films based on short fiction Category Films directed by Laurence Trimble ...   more details



  1. Determiner spreading

    orphan date August 2009 In linguistics , determiner spreading DS is the appearance of more than one determiner associated with a noun phrase , usually marking an adjective as well as the noun itself. ref name Marinis cite book last Marinis first Theodoros title The acquisition of the DP in modern Greek url http books.google.com books?id eiBBt1tXgYC&pg PA165&dq 22determiner spreading 22 PPA165,M1 accessdate 2009 05 05 year 2003 publisher John Benjamins Publishing Company isbn 9027225001 pages 165 190 chapter The acquisition of Determiner Spreading 6 ref The extra determiner has been called an adjectival determiner . ref name Rivero cite book last Rivero first Mar a Luisa coauthors Angela Ralli title Comparative syntax of Balkan languages url http books.google.com books?id 4scXTHHkMckC&pg PA189&dq 22determiner spreading 22 PPA165,M1 accessdate 2009 05 05 year 2001 publisher Oxford University Press isbn 0195129520 pages 165 166, 191 192 ref Typical examples involve multiple occurrences of the definite article or definiteness marking, such as is found in Modern Greek 1 class wikitable border 1 Agorasa to kokkino to forema. I.bought the red the dress Determiner spreading in Greek is not obligatory, and it contrasts with a non spreading example 2 class wikitable border 1 Agorasa to kokkino forema. I.bought the red dress Researchers have tried to elucidate the nature of the difference both syntax syntactically and semantics semantically between these two kinds of structures. One widely accepted conclusion is that the determiner spreading structure requires a kind of focus, usually contrastive, on the adjective so that 1 is appropriate as where I bought the RED dress , not the BLUE one would be and that the adjective in question must be intersective so no determiner spreading is possible .... They.went to.the Cyprus and they.crossed the red the line When determiner spreading involves the definite article , such noun phrases are sometimes called polydefinites . Determiner spreading is also ...   more details



  1. Spreading Death

    Spreading Death was released on both DVD single and CD single. Infobox album See Wikipedia WikiProject Albums Name Spreading Death Type video Artist Norther Cover Norther Spreading Death.jpg Cover size Released September 1, 2004 Recorded August September 2003 at Astia Studio A Genre Melodic death metal Length 44 46 Label Spinefarm Records Spinefarm Director Producer Anssi Kippo br Black Lion Reviews Chronology Last album This album Next album Misc Extra chronology Artist Norther single Type Single Last single Unleash Hell song Unleash Hell br 2003 This single Spreading Death br 2004 Next single Scream Norther song Scream br 2006 Extra chronology Artist Norther album Type Studio Album Last album Mirror of Madness br 2003 This album Death Unlimited br 2004 Next album Solution 7 br 2005 Spreading Death is a DVD single by the Finland Finnish melodic death metal band Norther , released on September 1, 2004 by Spinefarm Records . It features the TV and raw footage versions of the Music video video for Death Unlimited produced by Yk Yksin inen and Mika Limppu Lindberg, two live tracks Betrayed and Cry directed and edited by Miika J. Norvanto. It also features the making of the video for Death Unlimited , behind the scenes footage and even a karaoke track Unleash Hell that is meant for your own scream along to the song. DVD contents Death Unlimited Video TV Version, raw uncut Produced ... by Riku Isohella External links Spreading Death DVD Single http www.endlesswar.net index.php?p spreading death dvd single Norther Official Fansite Spreading Death CD single Infobox single See Wikipedia WikiProject Albums Name Spreading Death Cover Norther Spreading Death.jpg Type Single music ... Spreading Death br 2004 Next single Scream Norther song Scream br 2006 Extra chronology Artist ... br 2004 Next album Solution 7 br 2005 Spreading Death was also released as a CD single on February 16 ... External links Spreading Death CD Single http www.endlesswar.net index.php?p spreading death ...   more details



  1. Seafloor spreading

    red is along spreading centers. Seafloor spreading is a process that occurs at mid ocean ridges ... from the ridge. Seafloor spreading helps explain continental drift in the theory of plate tectonics ... Walter M. title Sea Floor Spreading as Thermal Convection journal Journal of Geophysical Research ... spreading Image Plates tect2 en.svg thumb Plates in the crust of the earth, according to the plate tectonics theory In the general case, sea floor spreading starts as a rift geology rift in a Continental ... is formed when magma is forced upward toward the surface at a mid ocean ridge. If spreading continues ... geologists. Sea floor spreading can stop during the process, but if it continues to the point ... River has formed in the failed rift arm of the triple junction. Continued spreading and subduction Image Ridge render.jpg thumb 300px right Spreading at a mid ocean ridge The new oceanic crust ..., the Atlantic basin is actively spreading at the Mid Atlantic Ridge. Only a small portion of the oceanic ... home to one of the world s most active spreading centres the East Pacific Rise EPR with spreading rates of up to 13  cm yr. The Mid Atlantic Ridge is a wiktionary textbook textbook slow spreading centre while the EPR is used as an example of fast spreading. The differences in spreading rates affect ... s ocean basins decreases during times of active sea floor spreading. During the opening of the Atlantic .... Since then, it has been shown that the motion of the continents is linked to seafloor spreading ..., like the Mid Atlantic Ridge and the East Pacific Rise . The driver for seafloor spreading in plates ... Seafloor spreading Divergent boundary Mid ocean ridge Morley Vine Matthews hypothesis References ... of a mid ocean ridge physical oceanography expanded other DEFAULTSORT Seafloor Spreading Category ... ja no Havbunnsspredning nn Havbotnspreiing pl Spreading pt Expans o do fundo oce nico ru simple Seafloor spreading sk Rozch dzanie oce nskeho dna sh irenje morskog dna th ...   more details



  1. Spreading the News

    Spreading the News is a short one act comic play by Lady Gregory , which she wrote for the opening night of the Abbey Theatre in Dublin, 27 Dec. 1904. It was on a double bill with William Butler Yeats s Cathleen Ni Houlihan. Audiences may have dozed through Yeats s play ref Elizabeth Coxhead, Lady Gregory A Literary Portrait NY Harcourt, Brace, and World, 1961 , p. 79 ref , but Spreading the News was very successful and it is still acted at the Abbey Theatre as late as 1961. ref Coxhead, p. 80 ref Lady Gregory remarked after seeing an early performance of the play that the audience would laugh so much at Spreading the News that they lost about half the dialogue. I mustn t be so amusing again ref quoted in Kohfeldt, Mary Lou, Lady Gregory The Woman Behind the Irish Renaissance NY Athenuem, 1985 , p. 176 ref Plot summary In a small village in rural Ireland, a new English magistrate inspects stalls at the local fair, expecting the worst. Because of Mrs. Tarpey s hearing impairment and the villagers love of gossip, a misunderstanding grows and grows, leading to a false arrest for a murder that never happened. The play ends abruptly, with little resolution we are left wondering what happened. Most of the humour is situational, rather than playing with language. Because we know what really happened at the beginning, most of the play uses Irony dramatic irony . Main characters The majority of the characters are flat and undefined. Many of them are stock character s, whose behavior is stereotypical and whose presence merely advances the plot. Bartley Fallon a habitual pessimist, convinced that bad things will always happen to him. Mrs. Fallon a bit belligerent, but supportive of her husband until there is a suggestion that he has been unfaithful. Jack Smith the supposed victim, owns ... Spreading the News is a comedy that exploits both English and Irish stereotypes. Lady Gregory was a member ... sides in the play. Spreading the News may have been written to help the Irish and the English understand ...   more details



  1. Activation Portal

    unref date July 2011 Infobox Album See Wikipedia WikiProject Albums Name Activation Portal Type studio Artist Alien Project Cover Activation Portal.jpeg Released 2007 Recorded Genre Length Label Producer Last album Space Jam br 2004 This album Activation Portal br 2007 Next album Activation Portal is the latest album by Alien Project . Track listing Super Buster Missing Linker NRG Tweaky rmx Deeper Activation Portal Get Up Groovy rmx Yellow Blaze Aztechno Dream rmx 2000s trance album stub Category 2007 albums Category Alien Project albums ...   more details



  1. Activation key

    Activation key may refer to Product activation Product key Volume license key Key changer software Dab Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ...   more details



  1. Marketing activation

    marketing Marketing activation is the execution of the marketing mix as part the marketing process. The activation ... analytics . Depending on the business objective, two types of marketing activation can be used as part of a marketing strategy. Brand activation, sometimes called brand engagement which focuses on building a longer term emotional connection between the brand and the customer. Activation based on direct response marketing will focus on generating immediate sales transactions. Planning the activation ... customer groups to target. By focusing on some fewer influencers only, activation can become more efficient ... source of information for planning marketing activation. A common practice is to use customer relationship management tools and techniques to augment the impact of marketing activation because CRM provides an integrative framework in which marketing activation and customer activities ... DILIMA accessdate 18 August 2011 ref Challenges A successful marketing activation will allow businesses ... will face in putting in place a marketing activation program. One of the challenges is dealing ... to adapt rapidly. This poses a challenge because, for example, direct marketing activation triggers ... accessdate 18 August 2011 ref Another challenge related to marketing activation has to do with reaching ..., it engages in unique marketing activation, including strong use of PR and events targeted at black ... PRWeek date October 1, 2010 ref Data driven marketing activation Over the years, marketing activation has become more and more data driven. This allows marketers to be more precise in their actions ... important because marketing activation usually entails a universal blast of information to all consumers. Oftentimes, only a small proportion of the consumers react positively to such activation ... in marketing activation. For example, video based measurement ... provides visibility into shopper engagement and behaviour relative to exact marketing activation, enabling a holistic approach to shopper ...   more details



  1. Activation energy

    is now energetically favorable. In chemistry , activation energy is a term introduced in 1889 by the Swedish ... reaction to occur. Activation energy may also be defined as the minimum energy required to start a chemical reaction. The activation energy of a reaction is usually denoted by E sub a sub , and given in units of joule per mole kilojoules per mole . Activation energy can be thought of as the height ... than the activation energy. At a more advanced level, the Arrhenius Activation energy term from the Arrhenius ... of the reaction rate to temperature. There are two objections to associating this activation ... reaction rates. Negative activation energy In some cases, rates of reaction decrease with increasing ... reactions exhibiting these negative activation energies are typically barrierless reactions, in which ... The Arrhenius equation gives the quantitative basis of the relationship between the activation energy and the rate at which a reaction proceeds. From the Arrhenius equation, the activation energy ... rate constant reaction rate coefficient . While this equation suggests that the activation ... Catalysis Image Activation energy.svg right thumb 360px The relationship between activation energy ... to initiate the reaction. A substance that modifies the transition state to lower the activation ... the catalyst lowers the activation energy, it does not change the energies of the original reactants or products. Rather, the reactant energy and the product energy remain the same and only the activation ... Mean kinetic temperature External links http www.iupac.org goldbook A00102.pdf Activation energy from ... bp ch22 activate.html The Activation Energy of Chemical Reactions Category Chemical kinetics Category ... fr nergie d activation gl Enerx a de activaci n ko id Energi aktivasi it Energia ...   more details



  1. Immunologic activation

    In immunology , activation is the transition of leucocytes and other cell types involved in the immune system . On the other hand, deactivation is the transition in the reverse direction. This balance is tightly regulated, since a too small degree of activation causes susceptibility to infection s, while, on the other hand, a too large degree of activation causes autoimmune diseases . Factors Activation and deactivation results from a variety of factors, including cytokines , soluble receptor s, arachidonic acid metabolites, steroids , receptor antagonists , adhesion molecules , bacterial products and viral products. class wikitable Overview of activating and deactivating factors. Activation Deactivation Cytokines IFN GM CSF M CSF Interleukin 6 IL 6 TNF Macrophage migration inhibitory factor MIF CCL2 Interleukin 4 IL 4 Interleukin 10 IL 10 Interleukin 13 IL 13 TGF Soluble receptor s sIL 1R sIL 6R sTNFR sCD14 Arachidonic acid metabolites PGE2 LTB4 Steroids Corticosteroids Receptor antagonists IL 1Ra Adhesion molecules 2 integrins Fc receptors CD14 P selectin CD45 Bacterial products lipopolysaccharide LPS fMetLeuPhe Viral products dsRNA BCRF1 Interleukin 10 IL 10 homologue T2 biochemistry T2 sTNFR homologue M T7 sINF R homologue See also Immune system Category Immunology ...   more details



  1. Neutron activation

    Neutron activation is the process in which neutron radiation induces radioactivity in materials, and occurs when atomic nucleus atomic nuclei capture free neutron s, becoming heavier and entering excited state s. The excited nucleus often decays immediately by emitting particles such as neutrons, proton s, or alpha particle s. The neutron capture , even after any intermediate decay, often results in the formation of an unstable activation product . Such radioactive nuclei can exhibit half life half lives ranging from small fractions of a second to many years. An example of this kind of a nuclear reaction occurs in the production of cobalt 60 within a nuclear reactor nuclide cobalt 59 n nuclide cobalt 60 The cobalt 60 decays by the emission of a beta particle plus gamma ray s into nickel 60. This reaction has a half life of about 5.27 years, and cobalt 60 is a valuable source of nuclear radiation for radiotherapy . In other cases, and depending on the kinetic energy of the neutron, the capture of a neutron can cause nuclear fission the splitting of the atomic nucleus into two smaller nuclei. If the fission requires an input of energy, that comes from the kinetic energy of the neutron. An example of this kind of fission in a light element can occur when the only stable isotope of beryllium ... neutron flux es, such as within the cores of nuclear reactors, neutron activation contributes to material ... materials are more subject to neutron activation than others, so a suitably chosen low activation ... activation of the bomb itself and the surrounding material, in addition to fission product s. Neutron activation also has a practical use. Neutron activation analysis is one of the most sensitive ... of art. Although the activation induces radioactivity in the object, its level is typically low and its lifetime may be short, so that its effects soon disappear. In this sense, neutron activation is a non ... reports series 156.pdf Handbook on Nuclear Activation Cross Sections, IAEA, 1974 http www.nacdl.org ...   more details



  1. Plasma activation

    Unreferenced date November 2006 Plasma activation or Plasma functionalization . It is done with the intent to alter or improve adhesion properties of surfaces prior to coating, painting, etc. In most cases, the surface in question is surface of a polymer material and weakly ionised oxygen plasma physics plasma is used. Surface activation is a result of following processes Removal of weak boundary layers. Plasma removes surface layers with the lowest molecular weight , at the same time it oxidation oxidises the uppermost atomic layer of the polymer. Cross linking of surface molecules. Oxygen radicals and UV radiation , if present help break up bonds and promote the three dimensional chemical bond cross bonding of molecules Generation of polar groups. Oxidation of the polymer is responsible for the increase in chemical polarity polar groups which is directly related to the adhesion properties of the polymer surface. See also List of plasma physics articles DEFAULTSORT Plasma Activation Category Plasma processing Chem stub ru ...   more details



  1. Product activation

    Refimprove date April 2011 Product activation is a license validation procedure required by some Proprietary software proprietary computer software programs. In one form, product activation refers to a method invented by Ric Richardson and patented US 5,490,216 by Uniloc where a software application Hash function hashes hardware serial numbers and an ID number specific to the product s license a product key to generate a unique CD key installation ID . This installation ID is sent to the manufacturer to verify the authenticity of the product key and to ensure that the product key is not being used for multiple installations. Alternatively, the software vendor sends the user a unique product serial number. When the user installs the application it requests that the user enter their product serial number, and checks it with the vendor s systems over the Internet . The application obtains the license ... required with the vendor s systems. Some activation systems also support activation on user systems ... terminal. Microsoft first used product activation in Microsoft Word Microsoft Word 97 sold ... Microsoft Publisher 98 in the Brazil ian market. Microsoft then rolled out product activation ... the product via the Internet. After its success, the product activation system was extended ... before reactivating it on the new machine. An early example of product activation was in the MS DOS ... key, the software deliberately crashed. The software has long since had the entire activation ... require users to transfer activation when moving a product from one computer to another, when ... date September 2009 See also Microsoft Product Activation CD key Digital rights management Dongle References ... Activation http www.vttoth.com dontactivate.asp table List of products requiring activation http agilis sw.com casestudy NumeriX.html Case study of a software vendor s use of activation DEFAULTSORT Product Activation Category Software licenses ar ca Activaci de producte de Produktaktivierung ...   more details



  1. Entropy of activation

    The entropy of activation is one of the two parameters typically obtained from the temperature dependence of a reaction rate, when these data are analysed using the Eyring equation . Symbolized S sup sup , the entropy of activation provides clues about the molecularity of the rate determining step in a reaction, i.e. whether the reactants are bonded to each other, or not. Positive values suggest that entropy increases upon achieving the transition state, which often indicates a Dissociative substitution dissociative mechanism . Negative values for S sup sup indicate that entropy decreases upon achieving the transition state, which often indicates an Associative substitution associative mechanism . Values near zero are difficult to interpret. ref J. H. Espenson Chemical Kinetics and Reaction Mechanism McGraw Hill, 1981, ISBN 0 070019667 2. ref References references Category Chemical kinetics ...   more details



  1. Activation product

    Activation products are materials made radioactive by neutron activation . Fission products and actinide s produced by neutron absorption of nuclear fuel itself are normally referred to by those specific names, and activation product reserved for products of neutron capture by other materials, such as structural components of the nuclear reactor or nuclear bomb , the reactor coolant, control rods or other neutron poison s, or materials in the environment. All of these, however, need to be handled as radioactive waste . Some nuclides originate in more than one way, as activation products or fission products. Activation products in a reactor s primary coolant loop are a main reason why reactors use a chain of two or even three coolant loops linked by heat exchanger s. Fusion reactor s will not produce radioactive waste from the fusion product nuclei themselves, which are normally just helium 4 , but generate high neutron fluxes, so activation products are a particular concern. Activation product radionuclides include class wikitable sortable Nuclide See also Halflife br years Parent Tritium 12.3 Lithium 6,7 br Boron 10 br Deuterium Beryllium 10 1,530,000 Boron 10 Carbon 14 5,730 Nitrogen 14 br Carbon 13 Sodium 24 Fast breeder 0.0017 Sodium 23 Sulfur 35 0.24 Chlorine 35 1 branch Chlorine 36 301,000 Chlorine 35 Argon 39 269 Argon 38 Iron 55 2.73 Iron 54 Nickel 59 76,000 Nickel 58 Cobalt 60 5.27 Cobalt 59 Nickel 63 100 Nickel 62 Molybdenum 93 4,000 Molybdenum 92 Niobium 93m 16 Niobium 94 20,300 Niobium 93 Technetium 99 LLFP 211,000 Molybdenum 98 Silver 108m 418 Silver 107 Cadmium 113m 13 Cadmium 112 Tin 121m http www.nrc.gov reading rm doc collections nuregs contract cr6567 cr6567.pdf 56 Tin 120 Lead 205 Q 51KeV 15,300,000 Lead 204 Polonium 210 LBE 0.379 Bismuth 209 External links http www nds.iaea.org reports new tecdocs technical reports series 156.pdf Handbook on Nuclear Activation Cross Sections, IAEA, 1974 http www.nndc.bnl.gov databases databases.html Nuclear Structure ...   more details



  1. Activation function

    . This activation function is linear, and therefore has the same problems as the binary function. In addition ... function sigmoid activation function. One realistic model stays at zero until input current is received ... s is a sigmoidal activation function in the form of a hyperbolic tangent. Two forms of this function ... with certain types of computational problems. Alternative structures A special class of activation ... , which are extremely efficient as universal function approximators. These activation functions .... Support vector machines SVMs can effectively utilize a class of activation functions that includes ... hyperplane based on a few training inputs called support vectors math x math . The activation ... to the activation function, but they take a unique form in the perceptron as math , phi v i tanh ... certain conditions for convergence. These machines can also accept arbitrary order polynomial activation ... year 1998 publisher Prentice Hall location isbn 0 13 273350 1 ref Activation function having types Identity ...   more details



  1. Behavioral activation

    Behavioral activation is a third generation behavior therapy for treating major depressive disorder depression ... underpinnings Behavioral activation emerged from a component analysis of cognitive behavioral ... and reduce punishment. The theoretical underpinnings of behavioral activation ref Jacobson, N.S. Martell, C.R. & Dimidjian, S. 2001 . Behavioral Activation for depression Returning to contextual roots ... long term patterns which may lead to dysthymia . Methods The behavioral activation BA approach to depression ..., D.W. year 2004 title A Brief Behavioral Activation Treatment for Depression journal Behavior ... group who did not receive the same treatment. The results of those who received behavioral activation ... since piloted ref Cullen, J.M. Spates, C.R. Pagoto, S. & Doran, N. 2006 . Behavioral Activation ..., C.R. Pagoto, S. & Kalata, A. 2006 . A Qualitative And Quantitative Review of Behavioral Activation ... ref Research support A recent review of behavioral activation studies for depression found ... name spates pagoto kalata 2006 A large scale treatment study found behavioral activation to be more ... author Dimidjian, S. year 2006 title Randomized Trial of Behavioral Activation, Cognitive Therapy ... activation has been applied to anxiety and appears to give promising results. ref Hopko, D.R. Robertson, S.M.C. & Lejuez, C.W. 2006 . Behavioral Activation for Anxiety Disorders. The Behavior ..., M. year 2006 title Effect of Behavioral Activation Treatment on Fibromyalgia Related Pain Anxiety ... therapy believe that behavioral activation will have much to offer other areas such as post traumatic ... generation behavior therapies Behavioral activation comes under the heading clinical behavior analysis ... psychotherapy FAP . Behavioral activation owes its basis to Charles Ferster s Functional Analysis ... in behavior therapy which covers behavioral activation. ref http worldcenterba.com index.html World Association for Behavior Analysis ref References reflist 2 DEFAULTSORT Behavioral Activation Category ...   more details



  1. Dopant Activation

    Sorry not sure where to put talk P added refs and rewritten. dopant activation isnt always done with rapid thermal processing so think needs it own stub Dopant Activation is the process of obtaining the desired electronic contribution from dopant impurity species in a semiconductor host. ref cite book title Dopant dopant and dopant defect processes underlying activation kinetics last Mokhberi first Ali authorlink coauthors year 2003 publisher Stanford Unniversity location isbn page pages 186 url accessdate ref The term is often restricted to the application of thermal energy following the ion implantation of dopants. In the most common industrial example, rapid thermal processing is applied to silicon following the ion implantation of dopants such as phosphorus, arsenic and boron. ref cite journal last1 Pelaz first1 last2 Venezia first2 year 1999 title Activation and deactivation of implanted B in Si journal Applied Physics Letters volume 75 issue pages 662 publisher doi url http apl.aip.org resource 1 applab v75 i5 p662 s1 accessdate ref Vacancies generated at elevated temperature 1200 C facilitate the movement of these species from crystallographic defect interstitial to crystallographic defect substitutional lattice sites while amorphous solid amorphization damage from the implantation process recrystallization recrystallizes . A relatively rapid process, peak temperature is often maintained for less than one second to minimize unwanted chemical diffusion . ref http www.thinfilmmfg.com subscribers article06 junctions10Mar06.htm faster New activation anneals help dopants stay put ref References references Category Semiconductor material structures Electronics stub ...   more details



  1. Endothelial activation

    Endothelial activation is a proinflammatory and Coagulation procoagulant state of the endothelial cell s lining the Lumen anatomy lumen of blood vessel s. It is most characterized by an increase in interactions with white blood cell s leukocytes , and it is associated with the early states of atherosclerosis and sepsis , among others. ref name Alom cite journal author Alom Ruiz SP, Anilkumar N, Shah AM title Reactive oxygen species and endothelial activation journal Antioxid Redox Signal year 2008 volume 10 issue 6 pages 1089 100 pmid 18315494 doi 10.1089 ars.2007.2007 ref It is also implicated in the formation of deep vein thrombosis . ref name Whatis cite journal author Bovill EG, van der Vliet A title Venous valvular stasis associated hypoxia and thrombosis what is the link? journal Annu Rev Physiol year 2011 volume 73 issue pages 527 45 pmid 21034220 doi 10.1146 annurev physiol 012110 142305 ref As a result of activation, enthothelium releases Weibel Palade body Weibel Palade bodies . ref name Lopez cite journal author L pez JA, Chen J title Pathophysiology of venous thrombosis journal Thromb Res year 2009 volume 123 issue Suppl 4 pages S30 4 pmid 19303501 doi 10.1016 S0049 3848 09 70140 9 ref See also Endothelial dysfunction References reflist circulatory stub Category Circulatory system ...   more details



  1. Activation syndrome

    Activation syndrome is a form of sometimes suicidal or homicidal stimulation or agitation that can occur in response to some psychoactive drug s. ref http www.breggin.com recentregulatory.pbreggin.2006.pdf ref A study of paroxetine found that 21 out of 93 23 percent of youth taking Paxil reported manic like symptoms which included hostility, emotional lability and nervousness. ref citation url http www.lib.umd.edu drum handle 1903 6668 title Adolescents and Antidepressants Analyzing a Social Scientific Controversy author AD Nelson year 2007 ref Pfizer has denied that sertraline can cause such effects. ref http www.healyprozac.com AcademicStalking Post 203 20 20Pfizer 20letter 20re 20Healy.pdf ref ref http www.ahrp.org ethical HealyResponseToPfizer.pdf ref Approximately 25 to 40 perecent of patients who take tricyclic antidepressant s experience activation syndrome upon initial titration. ref http www.aafp.org afp 980515ap saeed.html ref References reflist Category Psychoactive drugs disease stub ja ...   more details



  1. Oocyte activation

    Oocyte or ovum egg activation is a series of processes that occur in the oocyte after fertilisation . Sperm entry causes calcium release into the oocyte. In mammals, this has been proposed to be caused by the introduction of phospholipase C isoform zeta PLC from the sperm cytoplasm, although this remains to be established definitively. Activation of the ovum includes the following events Cortical reaction to block against other sperm cells Activation of egg metabolism Reactivation of meiosis DNA synthesis Sperm trigger of egg activation The sperm may trigger egg activation via the interaction between a sperm protein and an egg surface receptor. It is possible that a receptor is activated by the sperm binding which activates a tyrosine kinase which then activates phospholipase C PLC . The inositol signaling system has been implicated as the pathway involved with egg activation. IP sub 3 sub and DAG are produced from the cleavage of PIP sub 2 sub by phospholipase C. However, another hypothesis is that a soluble sperm factor diffuses from the sperm into the egg cytosol upon sperm oocyte fusion. The results of this interaction could activate a signal transduction pathway that uses second messengers . A novel PLC isoform, PLC , may be the equivalent of the mammalian sperm factor. A recent paper shows that mammaliam sperm contain PLC zeta which can start the signaling cascade. ref cite journal author Saunders C, Larman M, Parrington J, Cox L, Royse J, Blayney L, Swann K, Lai F title PLC zeta a sperm specific trigger of Ca 2 oscillations in eggs and embryo development. journal Development volume 129 issue 15 pages 3533 44 year 2002 pmid 12117804 ref Fast and slow block to polyspermy See Cortical reaction Polyspermy is the condition when multiple sperm fuse with a single egg. This results in duplications of genetic material. In sea urchins, the block to polyspermy comes from ... oocyte activation Oocyte activation may be artificially facilitated by calcium ionophore s, something ...   more details




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