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 Unreferenced date December 2006 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 Richard Lynn Lynn, Richard ... isbn 0275949176 ref In the case of microbiology and molecular biology , negativeselection is used ... have shrunk and a recent study shows that extraction is making an artificial selection to eliminate ... References reflist 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. The 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. As this happens relatively often, once the dictator dies, or is removed by some external influence, 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
wiktionarypar negativeNegative may refer to TOCright Science and mathematics Negative number Negative mass Negative energy disambiguation Electrical polarity Negative result 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 The Negatives, a band headed by Lloyd Cole Negatives 1968 film Negatives 1968 film , a 1968 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 disambig ar de Negativ es Negativo eo Negativa fr N gatif 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
selection e.g. an infectious disease with only a low mortality rate or small population size small population s. Though deleterious alleles may sometimes become established, selection may act negatively as well as positively. Negativeselection decreases the prevalence of traits that diminish ... 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 ... , certain traits or allele s of genes segregating within a population may be subject to selection . Under selection, individuals with advantageous or Adaptation biology adaptive traits tend to be more ... generation than others do. When these traits have a genetic basis, selection can increase the prevalence ... selection is intense and persistent, adaptive traits become universal to the population or species ... selection experiments that permit the survival of organisms with user defined phenotypes. Artificial selection is widely used in the field of microbial genetics , especially molecular cloning . Overview Whether or not selection takes place depends on the conditions in which the individuals of a species ... undergo selection. Factors fostering selection include limits on resources nourishment, habitat space ... to such factors 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 occurs only when the individuals of a population are diverse in their characteristics ... are selectively neutral , selection does not occur. Meanwhile, selection does not guarantee that advantageous ... , such traits may become less common or disappear. In the face of selection even a so called deleterious ... more details
Context date October 2009 Negative Priming refers to a slowed response identification time to a target Stimulus physiology stimulus that has been previously ignored. In previous Clinical trial trials of the experiment this target stimulus or dn Probe probe was a distractor stimulus. It is widely assumed negative priming occurs as a result of the selection that occurs in the first display. ref name Tip http www.findarticles.com p articles mi qa3690 is 199612 ai n8755301 Miliken, B. & Joordens, S 1996 Negative priming without overt prime selection Canadian Journal of Experimental Psychology. Canadian Journal of Experimental Psychology, dec 1996 URL accessed 12 31 06 ref See also Priming psychology Inhibition of return Attention References references Category Cognition psych stub neuro stub ... 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
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 Intuitionism 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 , 1985 film Double Negatives , 2003 film starring Blake Neitzel Double Negative 2010 film Double Negative 2010 film , 2010 film Music Double Negative The Muffins album Double Negative The Muffins album , 2004 album by The Muffins Double NegativeNegative A album Double NegativeNegative A album , 2006 hardcore rave album by Negative A Double Negative band , Hardcore punk band based in North Carolina Double Negative single Double Negative single , 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
Freedom Liberalism sidebar Individualism sidebar Negative liberty is defined as freedom from interference ... alluding to liberty in its negative sense . The distinction between negative and positive liberty ... is deeply embedded in the political tradition. In Berlin s words, liberty in the negative ... by other persons . ref Berlin, I Two Concepts of Liberty ,1958 ref Restrictions on negative ... Erich Fromm drew a similar distinction between negative and positive freedom in his 1941 work ... positive sense of freedom to but in its negative sense of freedom from , namely freedom from ... Paul 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 ... of Philosophy describes negative liberty blockquote The negative concept of freedom ... is most ... 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 One might ask, How ... of the zone. Hobbes, who took a rather negative view of human nature, argued that a strong ... although his conception of liberty was largely negative in terms of non interference , he differed ... on himself the death he desires. ref http www.constitution.org jl 2ndtr04.htm ref Negative liberty ... powers. Jay s meaning would be better expressed by substituting negative liberty in place ... derives in part from our accepting restrictions on negative liberty. libertarianism Libertarian thinker Tibor Machan defends negative liberty as required for moral choice and, thus, for human flourishing ... more details
Negative pressure may refer to 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
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. 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
onto unexposed film. When the film is developed it is a long strip of small negative images .... Each of these negative images may be referred to as a negative and the entire strip or set of images may be collectively referred to as negatives. These negative images are the master images, from which all other copies will be made, and thus they are treated with care. Negative image A positive image is a normal image. A negative image is a total inversion of a positive image, in which light areas appear dark and vice versa. A negative color image is additionally color reversed , with red areas ... images. Negative film Many photographic processes create negative images the chemicals involved react ... while the unexposed chemicals are washed away. However, when a negative image is created from a negative image just like multiplying two negative numbers in mathematics a positive image results see ... negative films and processes. Special films and development processes have been devised ... others. ref http www.photoclique.com 2010 07 hp introduces large format photo negative application for fine art quality professional photo editions HP Introduces Large Format Photo Negative Application ... category Negative photography http www.copyscan.co.il information.html Articles about negative scanning in Hebrew only photography subject DEFAULTSORT Negative Photography Category Photography equipment ... lt Negatyvas nl Negatief fotografie ja pl Negatyw ru simple 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 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 result may refer to Proof of impossibility , a proof that a particular problem cannot be solved. Null result , a result which shows no evidence of the intended effect. disambig ... more details
The paper negative process consists of using a Negative photography negative printed on paper either photographically or digitally to create the final print of a photograph , as opposed to using a modern negative on a film base of cellulose acetate . The plastic acetate negative which is what modern films produce enables the printing of a very sharp image intended to be as close a representation of the actual subject as is possible. By using a negative based on paper instead, there is the possibility of creating a more ethereal image, simply by using a paper with a very visible grain, or by drawing on the paper, or distressing it in some way. One of the original forms of photography was based on the paper negative process. William Henry Fox Talbot Talbot s waxed paper negative process, which was used to create his work The Pencil of Nature , used a negative created on paper treated with silver salts, which was exposed in a camera obscura to create the negative and then contact printed on a similar paper to produce a Positive photography positive image. When Talbot created this process it was intended to be a way to reproduce nature as accurately as possible hence the name of his work, The Pencil of Nature . Through the years afterward, however, better and more accurate ways of producing exact replicas of nature were developed, and these processes relegated the paper negative process to obsolescence. The process of the paper negative is still relevant, though, in the realm of alternative process photography. Photographers employing alternative processes reject the idea of the exact replica of nature and seek to use the inherent inexactness of antiquated processes to create a more personal and emotional image. The paper negative is an extremely versatile process that allows ... showcase showcase descrp.php 9 1 0 0 Shadows and Light The Paper Negative A Short Essay on the Paper Negative and 28 Early Examples Category Photographic processes dating from the 19th century ... 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 albums Category Debut albums 1990s rock album stub sr Negative ... 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
thumb right This thermometer is indicating a slightly negative temperature . A negative ... of as a negative asset , or a decrease in some quantity may be thought of as a negative increase. Negative numbers are also used to describe values on a scale that goes below zero, such as the Celsius and Fahrenheit scales for temperature . Negative numbers are usually written with a Plus and minus signs minus sign in front. For example, &minus 3 would represent a negative quantity with a magnitude ... zero is called positive zero is usually thought of as neither positive nor negative. The positivity ... real number other than zero is either positive or negative. The positive whole numbers are referred to as natural number s, while the positive and negative whole numbers together with zero are referred ... in parentheses, as an alternative notation to represent negative numbers. Negative numbers appeared ... older material. ref name struik33 Struik, page 32 33. In these matrices we find negative numbers, which ... rules on the use of negative numbers, which later spread to the Middle East, and then into Europe. Prior to the concept of negative numbers, negative solutions to problems were considered false and equations requiring negative solutions were described as absurd. ref Diophantus , Arithmetica . ref Introduction As the result of subtraction Negative numbers can be thought of as resulting from the subtraction of a larger number from a smaller. For example, negative three is the result of subtracting ... a negative result, with the magnitude of the result being the difference between the two numbers ... negative numbers, positive numbers, and zero is often expressed in the form of a number line File ... numbers to the right and the negative numbers to the left. Note that a negative number with greater ... math 5 , written math 8 5 negative math 8 is considered to be less than negative math 5 math 8 5. In addition, any negative number is less than any positive number, so math 8 5 and math ... more details
he introduced the concept of negative energies and negative probabilities Negative energies and probabilities ... a negative of money. The idea of negative probabilities later received increased attention in physics and particularly in quantum mechanics . Richard Feynman argued ref Feynman, R. P. 1987 Negative Probability ... that no one objects to using negative numbers in calculations, although minus three apples is not a valid concept in real life. Similarly he argued how negative probabilities as well as probabilities above 1 number unity possibly could be useful in probability calculations . Negative probabilities have .... ref Half coins provide simple examples for negative probabilities. These strange coins were introduced in 2005 by G bor J. Sz kely . ref Sz kely, G.J. 2005 Half of a Coin Negative Probabilities ... even numbers are taken with negative probabilities. Two half coins make a complete ... distribution where some of the probabilities are negative then one can always find two other independent ... in 1932 to study quantum corrections, often leads to negative probabilities, or as some would say quasi ... distribution . In 1945, M. S. Bartlett worked out the mathematical and logical consistency of such negative valuedness. ref cite journal last Bartlett first M. S. year 1945 title Negative Probability ... Phase space quantization . Its negative features are an asset to the formalism, and often indicate quantum interference. The negative regions of the distribution are shielded from direct observation ... quasi probability distribution are highly constrained, and prevent direct measurability of the negative ... value s of observable quantities computed through such distributions, nevertheless. Negative ... that helps simplify calculations. By allowing such pseudo probabilities to be negative ..., New York ref A rigorous mathematical definition of negative probabilities and their properties was recently derived by Mark Burgin and Gunter Meissner 2011 . The authors also show how negative ... more details
orphan date September 2008 Negative 7 is a rock band formed in Tacoma, Washington , United States USA in 2003 . Influenced by Incubus band Incubus , Deftones , and others. Members are Steve Fox drummer Steve Fox Drum kit drums , Mike Ramos bassist Mike Ramos Bass guitar bass , Shane Forberg guitar , and Erik Brotman Singing vocals . External links http www.negative7.com The Official Website of Negative 7 Dead link date March 2011 http www.myspace.com negative7 Negative 7 on Myspace US alternative rock band stub Category American alternative rock groups ... more details
orphan date August 2008 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 Category Credit cards Category Data security econ stub database stub ... more details
Negative luminescence is a physical phenomenon by which an electronic device emits less thermal radiation when an electric current is passed through it than it does in thermal equilibrium current off . When viewed by a thermal camera , an operating negative luminescent device looks colder than its environment. Physics Negative luminescence is most readily observed in semiconductor s. Incoming infrared radiation is absorbed in the material by the creation of an electron hole pair . An electric field is used to remove the electrons and holes from the region before they have a chance to recombine and re emit thermal radiation. This effect occurs most efficiently in regions of low charge carrier density. Negative luminescence has also been observed in semiconductors in orthogonal electric and magnetic fields. In this case, the junction of a diode is not necessary and the effect can be observed in bulk material. A term that has been applied to this type of negative luminescence is galvanomagnetic luminescence . Negative luminescence might appear to be a violation of Kirchhoff s law of thermal radiation . This is not true, as the law only applies in thermal equilibrium . Another term that has been used to describe negative luminescent devices is Emissivity switch , as an electric current ... UK now QinetiQ . These British workers later demonstrated LWIR band 8 12 m negative luminescence ... DC , started work on negative luminescence in mercury cadmium telluride HgCdTe . The phenomenon has since been observed by several university groups around the world. References Applications of negative ... 00038 2 Negative luminescence and its applications , C. T. Elliott, Philosophical Transactions Mathematical ... vol. 47, Iss. 12, pp. 1330 1332 1985 doi 10.1063 1.96270 Negative luminescence of semiconductors ..., Infrared optical system Cold shield External links http mirdog.spb.ru Negative luminescence.htm Negative ... Negative Luminescence Negative Luminescence in semiconductors Category Semiconductors Category ... more details
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