Negativeselection may refer to In biology Negativeselection natural selection , in natural selection it refers to the selective removal of rare alleles that are deleterious Negativeselection artificial selection , in artificial selection it refers to where negative, rather than positive, traits of a species are selected for In politics Negativeselection politics , is a process that occurs in rigid hierarchies, most notably dictatorships In immunology Negativeselection immunology T cells that recognize self MHC molecules and peptides with high affinity are deleted from the repertoire of cells. Central tolerance is produced. Avoids auto immunity. Occurs after positive selection. disambig it Selezione negativa ... more details
Other uses Negativeselection disambiguation In natural selection , negativeselection ref Loewe, L. 2008 . http www.nature.com scitable topicpage NegativeSelection 1136 Negativeselection . Nature Education 1 1 . ref or purifying selection is the selective removal of alleles that are Mutation Harmful mutations deleterious . This can result in stabilizing selection through the purging of deleterious variations that arise. Purging of deleterious alleles can be achieved on the population genetics level, with as little as a single point mutation being the unit of selection. In such a case, carriers of the harmful point mutation have fewer offspring each generation, reducing the frequency of the mutation in the gene pool. In the case of strong negativeselection on a locus, the purging of deleterious variants will result in the occasional removal of genetic linkage linked variation, producing a decrease in the level of variation surrounding the locus under selection. The accidental purging of non deleterious alleles due to such spatial proximity to deleterious alleles is called background selection . ref Brian Charlesworth Charlesworth, B. , Morgan, M. T. and Deborah Charlesworth Charlesworth, D. 1993. The effect of deleterious mutations on neutral molecular variation. Genetics 134 , 1289 1303. http www.genetics.org cgi content abstract 134 4 1289 Link ref This effect increases with higher mutation rate but decreases with higher recombination rate. ref cite journal author Hudson RR, Kaplan NL title Deleterious background selection with recombination journal Genetics volume 141 issue 4 pages 1605 17 year 1995 month December pmid 8601498 pmc 1206891 ref See Also Balancing selection Directional selection Disruptive selection Stabilizing selection Assortative mating References Reflist MolecularEvolution genetics stub Category Selection Category Genetics it Selezione ambientale ... more details
Other uses Negativeselection disambiguation Merge to artificial selection date July 2010 In artificial selection , negativeselection is where negative, rather than positive, traits of a species are selected for evolutionary continuance. It is generally not desirable, but may be caused by man made conditions such as bad management , or like when human s eat the best plants or animals they have, leading to worse and worse stock for example, it occurred frequently in primitive beekeeping . Fact date April 2007 Another more recent example are regulations on fish and deer, where fish below a certain desired size will be set free, and deer suffering small antlers would less likely to be hunted, leading to undersized fish and small antlered deer populations the same case applies to the elephant s tusks. ref cite web title Poachers have created breed of tuskless elephant publisher The Independent date 19 June 2001 last McCarthy first Michael url http www.independent.co.uk news world asia poachers have created breed of tuskless elephant 674663.html accessdate 2010 07 11 ref ref cite web date 20 Jan 2008 publisher Telegraph last Gray first Richard title Why elephants are not so long in the tusk url http www.telegraph.co.uk science science news 3322455 Why elephants are not so long in the tusk.html accessdate 2010 07 11 ref Some proponents of Social Darwinism and eugenics argue that medicine and other technology technological , society societal , and culture cultural practices cause negativeselection in humans, better known as dysgenics . According to them, human manifests more and more negative traits. ref cite book author Lynn, Richard title Dysgenics Genetic Deterioration in Modern ... In the case of microbiology and molecular biology , negativeselection is used to genetic screen screen ... study shows that extraction is making an artificial selection to eliminate faster growing ... Category Selection biology stub it Selezione negativa artificiale ... more details
Other uses Negativeselection disambiguation Refimprove date July 2007 Merge Tall poppy syndrome date June 2010 Negativeselection is a political process that occurs especially in rigid hierarchy hierarchies , most notably dictatorship s, but also to lesser degrees in such settings as corporations or electoral politics. The person on the top of the hierarchy, wishing to remain in power forever, chooses his associates with the prime criterion of incompetence &ndash they must not be competent enough to remove him from power. Since subordinates often mimic their leader, these associates do the same with those below them in the hierarchy, and the hierarchy is progressively filled with more and more incompetent people. If the dictator sees that he is threatened nonetheless, he will remove those that threaten him from their positions &ndash purge the hierarchy. Emptied positions in the hierarchy are normally filled with people from below &ndash those who were less competent than their previous masters. So, over the course of time, the hierarchy becomes less and less effective. Once the dictator dies &mdash or is removed by some external influence &mdash what remains is a grossly ineffective hierarchy. See also Tall poppy syndrome Mushroom management References cite news title first Andrej last Fajgelj url http www.nspm.rs kuda ide srbija negativna selekcija.html newspaper NSPM date 2009 10 14 accessdate 2009 10 14 language Serbian Category Selection poli stub ... more details
wiktionary negativeNegative may refer to tocright Science and mathematics Negative number Negative mass Negative energy disambiguation Electrical polarity Negative result disambiguation Negative lenses, uses to describe diverging optics, see lens optics Photography Negative photography , an image with inverted luminance or a strip of film with such an image Original camera negative , the film in a motion picture camera which captures the original image Paper negative , a negative image printed on paper used to create the final print of a photograph Linguistics Negation linguistics No word Negative, the opposite of Yes affirmative Grammatical polarity , a grammatical concept Entertainment Negative Finnish band , a Finnish band established in 1997 Negative Serbian band , a Serbian band established in 1999 NegativeNegative album NegativeNegative album , 1999 The Negatives, a band headed by Lloyd Cole Negative Y sui Inoue album Negative Y sui Inoue album , 1987 Negatives album Negatives album , a 2004 album by Phantom Planet Negatives 1968 film Negatives 1968 film , a 1968 film Negatives 1988 film Negatives 1988 film , a 1988 film Other uses Negative sign , the passive or feminine signs of the zodiac in astrology Negative space , in art, the space around or between elements of the subject Negative policy debate NEG , the team which negates the resolution in policy debate Negative feedback , a feedback loop that responds in the opposite direction to a perturbation Negative repetition , the performance of the eccentric phase of weight lifting See also Mu negative Negation disambiguation Negativity disambiguation Positive disambiguation Double Negative disambiguation disambiguation ar de Negativ es Negativo eo Negativa fr N gatif gd icheil it Negativo hu Negat v egy rtelm s t lap ms Negatif nl Negatief ja pt Negativo simple Negative sr fi Negatiivi sv Negativ ... more details
traits or allele s of genes segregating within a population may be subject to selection . Under selection ... than others do. When these traits have a genetic basis, selection can increase the prevalence of those traits, because offspring will genetics inherit those traits from their parents. When selection ... then be said to have evolved . Scientists who do experimental genetics employ artificial selection experiments that permit the survival of organisms with user defined phenotypes. Artificial selection ... or not selection takes place depends on the conditions in which the individuals of a species find ... selection. Factors fostering selection include limits on resources nourishment, habitat space, mates ... as selective pressures . Natural selection is the most familiar type of selection by name. The breeding of dogs, cows and horses, however, represents artificial selection . Subcategories of natural selection are also sometimes distinguished. These include sexual selection , ecological selection , stabilizing selection , disruptive selection and directional selection more on these below . Selection ... neutral , selection does not occur. Meanwhile, selection does not guarantee that advantageous ... may become less common or disappear. In the face of selection even a so called deleterious allele may become universal to the members of a species. This is a risk primarily in the case of weak selection ... s. Though deleterious alleles may sometimes become established, selection may act negatively as well as positively. Negativeselection decreases the prevalence of traits that diminish individuals capacity to succeed reproductively i.e. their fitness biology fitness , while positive selection increases the prevalence of adaptive traits. In biological discussions, traits subject to negativeselection are sometimes said to be selected against, while those under positive selection are said to be selected ... against shallow root architectures. Types and subtypes File Selection classification diagram.png ... more details
Multiple issues orphan February 2009 unreferenced March 2009 confusing March 2009 Negative Search involves the elimination of information which is not relevant from a mass of content in order to present to a user a range of relevant content. Negative Search is different to both Positive Search and Discovery Search. Positive Search uses the selection of relevance as its primary mechanism. Discovery uses calculation of relatedness between both user intent and content to present to users relevant alternatives of which they may not have been aware. Negative Search has application to those forms of searches where the user has the intention of finding a specific actionable piece information but lacks the knowledge of what that specific information is or might be. Negative Search can also apply to those forms of searching where the user has a clear understanding of Negative Intent what they don t want rather than what they do. Examples of Negative Intent are job searching someone knows they want a new job but they have no idea what it might be. They just know what they don t want. dating searching someone is looking for a dating partner, but cannot identify what criteria they are looking for. They just ... Information Criteria information criteria on which to base a search. Negative Search Classifiers If there are two forms of search positive and negative it follows that there are two forms of classifier ... referencing Kenya and present it. A Negative Search for the country Kenya would exclude all content ... experience may prove a highly powerful mechanism. It follows that Positive and Negative Search are not mutually exclusive and that more powerful search may result from the combination of selection and elimination as tools to empower user experience in Negative Searches. Degrees of Passivity Positive ... hotel, let me know Negative Search also involves an Active search but with a much higher degree of Passivity ... in a small number of dimensions but in Negative Search they are Passive in many or all dimensions ... more details
File Pens.JPG thumb Pens. Initially, the person picks out the red pen and therefore it is the negative ... to be prime distractors. When the person wants to use the blue pen negative priming Experimental terminology probe target instead, negative priming effects are observed as the blue pen was previously ignored as the prime distractor. Negative priming is an implicit memory effect in which prior exposure ... to a subconscious memory effect. Negative priming describes the slow and error prone reaction to a stimulus that is previously ignored. ref name rev Mayr, S. & A. Buchner 2007 Negative priming as a memory phenomenon A review of 20 years of negative priming research. Zeitschrift Fur Psychologie Journal ... pen, there is a momentary delay in this action however, there is a decline in the negative ... to the change of the distractor stimulus to target stimulus is called the negative priming effect. Negative ... some of them are stored in our short term memory . Negative priming is highly related to the selective nature of attention and memory. Broadly, negative priming is also known as the mechanism using ..., negative priming effect depends on the amount of distractors, effectiveness of the cognitive ..., G. A., & D Ubaldo, M. 2010 . No Negative Priming Without Cognitive Control. Journal of Experimental ... of theories and models that try to explain the reason behind negative priming. They all try to reason negative priming s role in cognition and justify why it occurs. A few of the well known ... is the oldest model that explains the negative priming effect as the result selective attention ... residual inhibition . ref name does Tipper, S.P. 2001 . Does negative priming reflect inhibitory ... Human Experimental Psychology, 54A, 321 343. ref ref Tipper, S.P. 1985 . The negative priming ... associated with this inhibition model. This model accounts for negative priming only when the stimuli ... stimulus. This model does not support negative priming effects found in cases short of goal directed ... more details
Negative energy may refer to The energy associated with negative mass A plot device in fiction A concept used in esotericism See also List of articles related to negative energy dab de Negative Energie fr nergie n gative ... more details
Negative return can refer to Negative return spaceflight the point during launch after which a spacecraft cannot abort to Earth. Negative return finance a loss on a financial investment disambig ... more details
Negative value may refer to Negative predictive value in statistics Negative ethic or philosophic value insolvency disambig Long comment to avoid being listed on short pages ... more details
Double Negative may refer to Double negative , concept in linguistics Double negative elimination , logic theory Double negation , logic theory p p when extended to infinite collections it is disallowed in intuitionistic logic also considered by some to be one of the Laws of Thought The G del Gentzen negative translation in proof theory Film Deadly Companion , 1980 film also known as Double Negative Double Negative 1985 film Double Negative 1985 film Double Negative 2010 film Double Negative 2010 film Music Double Negative , 2004 album by The Muffins Double Negative band , hardcore punk band based in North Carolina Double Negative , a single release from British art rock band Grammatics Acronyms Metamaterial Classes of metamaterials Double negative metamaterial DNG , a material with both permittivity and permeability less than zero, commonly called a metamaterial Double negative DN T cell s, also called CD4 CD8 Other Double Negative artwork , 1969 artwork on the Mormon Mesa in Nevada Double Negative A Vicky Bauer Mystery , a 1988 book by Leona Gom Double Negative VFX , London based visual effects facility See also Double disambiguation Negative disambiguation Negative double , a bridge game move disambig ... more details
File mammon.jpg thumb 120px left Although self interest is necessary to negative liberty , this is insufficient to guarantee both positive and negative liberty as they are in direct contrast to one another. Freedom Liberalism sidebar Individualism sidebar Negative liberty is defined as freedom from interference ..., 2 , thus alluding to liberty in its negative sense . The distinction between negative and positive ... is deeply embedded in the political tradition. In Berlin s words, liberty in the negative sense ... by other persons . ref Berlin, I Two Concepts of Liberty ,1958 ref Restrictions on negative liberty ... Erich Fromm drew a similar distinction between negative and positive freedom in his 1941 work, The Fear ... positive sense of freedom to but in its negative sense of freedom from , namely freedom from instinctual ... Ltd., 1966 26. ref For Fromm, then, negative freedom marks the beginning of humanity as a species conscious of its own existence free from base instinct. The distinction between positive and negative ..., who argue that positive and negative liberty are indistinguishable in practice, or that one cannot exist without the other. ref name Stanford http plato.stanford.edu entries liberty positive negative Stanford Encyclopedia of Philosophy on Negative Positive Liberty ref Although he is not a Socialist ... Stanford Encyclopedia of Philosophy describes negative liberty blockquote The negative concept of freedom ... necessarily enhances negative liberty. ref name Stanford ref Cohen, G. A., 1991, Capitalism, Freedom and the Proletariat, in Miller 1991 ref blockquote Negative liberty and authority Hobbes and Locke ... differ is the extent of the zone. Hobbes, who took a rather negative view of human nature, argued ... than Hobbes because although his conception of liberty was largely negative in terms of non interference ... Negative liberty in various thinkers John Jay , in Federalist Papers No. 2, stated that Nothing is more ... to vest it with requisite powers. Jay s meaning would be better expressed by substituting negative ... more details
Negative pressure may refer to Pressure Negative pressures negative pressure as opposed to positive pressure stretched liquid vacuum negative gauge pressure, a way of expressing pressure measurement s below atmospheric pressure suction transpirational pull See also pressure positive pressure disambig pt Press o negativa ... more details
sequences and miRNA s. ref cite doi 10.1101 gr.6146507 ref See also Balancing selection Directional selection Disruptive selectionNegativeselection natural selection Assortative mating Hypergamy ... Press year 2009 isbn 978 0 521 73071 http www.nature.com scitable topicpage NegativeSelection 1136 ...Image Selectiontypes n0 images.png thumb 225px A chart showing three types of selection Stabilizing or ambidirectional selection , not the same thing as negative or purifying selection ref cite book last Lemey first Philippe coauthors Marco Salemi, Anne Mieke Vandamme title The Phylogenetic Handbook publisher Cambridge University Press year 2009 isbn 978 0 521 73071 ref ref http www.nature.com scitable topicpage NegativeSelection 1136 ref , is a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular Trait biological trait value. This is probably the most common mechanism of action for natural selection. Stabilizing selection commonly uses negativeselection a.k.a. purifying selection to select against extreme values of the character. Stabilizing Selection is the opposite of disruptive selection , instead of favoring individuals with extreme phenotypes, it favors the intermediate variants. It reduces phenotypic variation and maintains the status quo. Natural selection tends to remove the more severe phenotypes, resulting in the reproductive success of the norm or average phenotypes. ref Cite document last1 Campbell first1 Neil A. last2 Reece first2 Jane B. title Biology publisher Benjamin Cummings pages 450 451 date year 2002 isbn ... higher. Stabilizing selection operates most of the time in most populations. This type of selection ... and ferns, has remained largely unchanged for millions of years. Stabilizing selection can ... doi 10.1038 351652a0 ref In human populations, 5 of the genome DNA is under purified selection for common ... 10.1038 351652a0 cite doi 10.1101 gr.6406307 cite doi 10.1101 gr.6146507 Category Selection Category ... more details
Infobox Album See Wikipedia WikiProject Albums Name Negative Type Album Artist Negative pop rock band Negative Cover Negative album .jpg Released December, 1999 Recorded 1999 Genre Rock music Rock Length 30 28 Label Automatic Records Producer Reviews Last album This album Negative br 1999 Next album Ni ovde ni tamo br 2002 Singles Name Negative Type studio single 1 Ja bih te sanjala single 1 date 1999 single 2 Svet tuge single 2 date 1999 single 3 Vreme je single 3 date 2000 single 4 Oblaci single 4 date 2000 single 5 Ti me ne voli single 5 date 2001 Negative is the 1999 debut studio album from influential Serbian rock band Negative pop rock band Negative . The album was an immediate success, and it included some of the band s greatest hits. Ja bih te sanjala became their signature song. During the next three years, the band had a string of successful singles such as Ja bih te sanjala , Oblaci , Svet tuge , Ti me ne volis and Vreme je . Videos were shot for all the singles from the album. In May 2000, the band had their first live act in front of several thousand people. The concert was recorded and released on a CD later that year. Track listing tracklist title1 Ja bih te sanjala length1 3 51 title2 Vesela length2 2 54 title3 Oblaci length3 3 00 title4 Svet tuge length4 3 43 title5 Sex length5 3 38 title6 Ti me ne voli length6 2 36 title7 Vreme je length7 2 35 title8 La length8 4 14 title9 Uspavanka length9 3 19 title10 Barakuda length10 2 38 External links http www.negativeband.net Negative Official Page Serbian and English http www.discogs.com NegativeNegative release 2175289 On www.discogs.com Negative Category Negative Serbian band albums Category 1999 debut albums 1990s rock album stub sr Negative ... more details
also Balancing selection Disruptive selectionNegativeselection natural selection Stabilizing selection .... al. title Positive Natural Selection in the Human Lineage journal Science volume 312 date 2006 doi ... G, Novembre J et. al. title Signals of recent positive selection in a worldwide sample of human populations journal Genome Research date May 2009 MolecularEvolution DEFAULTSORT Directional Selection Category Selection bg et Suunav valik es Selecci n direccional fa ... more details
displacement Balancing selection Directional selectionNegativeselection natural selection Stabilizing selection Sympatric speciation References references MolecularEvolution DEFAULTSORT Disruptive Selection Category Selection bg et L hestav valik fa ... white or black, but not gray. Significance Disruptive selection is of particular significance in the history ... seeds, and were hence maladaptive. While it is true that disruptive selection can lead to speciation ... change. This is largely because the results of disruptive selection are less stable than the results of directional selection directional selection favours individuals at only one end of the spectrum ... of the rabbits Suppose directional selection were taking place. The field only has dark rocks in it, so ... selection. The result is equal numbers of black and white rabbits, and hence equal numbers of chromosomes ... more details
In statistics , a relationship between two variables is negative if the slope in a corresponding graph is negative, or&mdash what is in some contexts equivalent&mdash if the correlation between them is negative. Negative correlation is also variously called anti correlation or indirect correlation . Example They observed a negative relationship between illness and vaccination. As incident of vaccination is increasing, incidence of illness is decreasing, and vice versa. Compare to a positive relationship Observed a positive relationship between illness and missed work. As incidence of illness increased, sick days taken also increased. External links http ordination.okstate.edu STATS.htm Category Statistical dependence stats stub ... more details
A negative repetition negative rep is the repetition of a technique in weight training weight lifting in which the lifter performs the eccentric phase of a lift. Instead of pressing the weight up slowly, in proper form, a Spotting weight training spotter generally aids in the concentric, or lifting, portion of the repetition while the lifter slowly performs the eccentric phase for 3 6 seconds. Negative reps promote hypertrophy greatly because they allow the muscles to experience extreme trauma. Everyone can lift with more weight doing negative reps. Negative reps should generally not be used more than twice a week. External links http www.criticalbench.com benchpressnegatives.htm Heavy negatives are positively a good idea An overview of what negatives do, and how to perform them on the bench press. Category Weight training exercises sports stub ... more details
Negative cutting also known as Negative matching and Negative conforming is the process of cutting motion picture negative to match precisely the final edit as specified by the film editor . Original camera negative OCN is cut with scissors and joined using a film splicer and film cement . Negative cutting ... s and release prints. The process of negative cutting has changed little since the beginning ... process. Kodak introduced barcode on motion picture negative in the mid 1990s. This enabled negative cutters to more easily track shots and identify film sections based on keykode . Toward the late 1990s and early 2000s negative cutting changed due to the advent of digital cinema technologies ..., due to the high cost of online suites, negative cutting is still used for commercials by reducing footage. Increasingly feature films are bypassing the negative cutting process altogether and are being ... has created a new demand for negative cutters to extract selected takes which are cut from the Dailies .... Basic negative cutting After a film shoot, the original camera negative OCN is sent to a film laboratory ... to the Editor who loads it into an offline edit suite. The lab rolls are sent to the negative cutter ... list EDL list and the EDL list is sent to the negative cutter. The negative cutter will translate the Timecode in the EDL list to edge numbers keykode using specially designed negative cutting software to find which shot is needed from the Juncaceae rushes negative. Traditionally a negative cutter would then fine cut the negative to match the Editor s final edit frame accurately. Negative would ... of negative. This reduces the negative required by up to 1 10 of the footage shot, saving considerable time during scanning or telecine . The negative cutter will create a new Online EDL list replacing ... facility for re telecine and compiled in an Online Suite for final grading. Negative Cutting Software There have been a number of dedicated software systems that have been developed for and by negative ... more details
Proving a negative or negative proof may refer to Evidence of absence in general, such as evidence that there is no milk in a certain bowl Modus tollens , a logical proof Proof of impossibility , mathematics Unfair burden , in law, a plaintiff need not prove a negative about a defendant Russell s teapot , an analogy inability to disprove does not prove Sometimes it is mistaken for an argument from ignorance , which is non proof and a logical fallacy. disamb Long comment to avoid being listed on short pages ... more details
A negative database , in Credit Card terms, refers to a list of Credit Card owners who chargeback a lot. Negative databases are usually maintained by Credit Card companies. The term negative database also refers to a security concept in database terms where contrary to traditional databases, such database saves attributes that cannot be associated with a certain entry. http sigfpe.blogspot.com 2006 10 negative databases.html http www.economist.com science displayStory.cfm?story id 7854216 Database Category Credit cards Category Database security econ stub database stub ... more details
The subject Negative Test can relate to A negative medical test , in which the target parameter that was evaluated was not present. In software testing , a test designed to determine the response of the system outside of what is defined. It is designed to determine if the system crashes with unexpected input. disambig Excess long comment to prevent listing on Special Shortpages ............................................................ more details
Orphan date April 2011 refimprove date January 2010 A negative volcano is a Caldera volcano that is a lake filled with hot springs. ref http www.d.umn.edu rmorton ronshome Volcanoes calderas.html ref An example of a negative volcano is Sturgeon Lake . Notes reflist http www.d.umn.edu rmorton ronshome Volcanoes calderas.html Category Volcanology geology stub ... more details
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