English Encyclopedia is licensed by Wikipedia (GNU). Black, "Stabilized feed-back amplifiers", Electrical Engineering, vol. ['pztv'] characterized by or displaying affirmation or acceptance or certainty etc.. 1. Boggle. Letters must be adjacent and longer words score better. A windows (pop-into) of information (full-content of Sensagent) triggered by double-clicking any word on your webpage. Evolution of the human psyche. All rights reserved. ['fidbk'] the process in which part of the output of a system is returned to its input in order to regulate its further output. Vandervert, L. (2009a). The system therefore shows bistable behaviour. By using our services, you agree to our use of cookies. [16], An electronic flip-flop or "latch" or "bistable multivibrator" is a circuit that due to high positive feedback is not stable in a balanced or intermediate state. good feedback. (2004) Vicious circles: positive feedback in major evolutionary and ecological transitions. Hyperbolic model implies a second-order positive feedback. [31] At the human level, Richard Alexander (1989) proposed that social competition between and within human groups fed back to the selection of intelligence thus constantly producing more and more refined human intelligence. [7] Friis and Jensen (1924) described regeneration in a set of electronic amplifiers as a case where the "feed-back" action is positive in contrast to negative feed-back action, which they mention only in passing. Noun Phrase Help other members in your team or department improve by offering positive feedback and suggestions. You can complete the list of synonyms of positive feedback given by the English Thesaurus dictionary with other English dictionaries: Wikipedia, Lexilogos, Oxford, Cambridge, Chambers Harrap, Wordreference, Collins Lexibase dictionaries, Merriam Webster. Give contextual explanation and translation from your sites ! Benefits of positive feedback Positive feedback can transform any workplace in any industry. The English word games are: Privacy policy [33] The analogy of Evolutionary arms races provide further examples of positive feedback in biological systems. Positive feedback synonyms What is another word for Positive feedback? This is the basis for many social phenomena, including Ponzi schemes and chain letters. Positive feedback may be controlled by signals in the system being filtered, damped or limited, or it can be cancelled or reduced by adding negative feedback. Princeton: Princeton University Press. Noun Phrase Even if you feel angry, support your teen as she reports on her findings and offer positive feedback. Within climate a positive feedback subsystem never acts in isolation, but is always embedded within the overall climate system, which itself is always subject to a very powerful negative feedback, the StefanBoltzmann law: that emitted radiation rises with the fourth power of temperature. adjective. Keesing, R.M. The meanings of certain and positive largely overlap; however, certain may apply to a basing of a conclusion or conviction on definite grounds or indubitable evidence. The wordgames anagrams, crossword, Lettris and Boggle are provided by Memodata. Positive feedback in mechanical design causes tipping-point, or 'over-centre', mechanisms to snap into position, for example in switches and locking pliers. Modern radio receivers use the superheterodyne design, with many more amplification stages, but much more stable operation and no positive feedback. Search positive feedback and thousands of other words in English definition and synonym dictionary from Reverso. Vandervert, L. (2009b). Human Biology, 17, 168-194. Random motions in molecular dynamics coupled with positive feedback can trigger interesting effects, such as create population of phenotypically different cells from the same parent cell. W. Brian Arthur (February 1990). positive feedback - feedback in phase with (augmenting) the input regeneration feedback - the process in which part of the output of a system is returned to its input in order to regulate its further output gl= tw(R)evolutionizing Political Communication through Social .Synonyms for positive feedback - ThesaurusSynonyms for positive feedback in Free Thesaurus. Trends in Ecology and Evolution, 19, 627-633. 'All Intensive Purposes' or 'All Intents and Purposes'. police are certain about the cause of the fire. The magnitude of the forces that act to move such a system away from its equilibrium are an increasing function of the "distance" of the state from the equilibrium. Each square carries a letter. [18], Thermal runaway occurs in electronic systems because some aspect of a circuit is allowed to pass more current when it gets hotter, then the hotter it gets, the more current it passes, which heats it some more and so it passes yet more current. ['pztv'] indicating existence or presence of a suspected condition or pathogen. Due to the controlled use of positive feedback, sufficient amplification can be derived from a single, The effect of using a Schmitt trigger (B) instead of a comparator (A), Illustration of an R-S ('reset-set') flip-flop made from two digital, A phonograph turntable is prone to acoustic feedback, Positive feedback is a mechanism by which an output is enhanced, such as protein levels. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Find more similar words at wordhippo.com! Working memory, the cognitive functions of the cerebellum and the child prodigy. In these cases hysteresis is mechanically achieved via positive feedback within a tipping point mechanism. [10] In that case, it can be shown that the overall or "closed loop" gain from input to output is: When AB > 1, the system is unstable, so does not have a well-defined gain; the gain may be called infinite. (1945). positive response. [29] This happens because noise can become amplified by positive feedback. noun. 53, pp. adjective. Noun Phrase Reward their hard work with positive feedback or small incentives. Noun Phrase Provide positive feedback to your students when appropriate. There are several designs for such harmonic oscillators, including the Armstrong oscillator, Hartley oscillator, Colpitts oscillator, and the Wien bridge oscillator. Out of control, it can cause bridges to collapse. 1 synonym for positive feedback: regeneration. Chaotic systems exhibit positive feedback at the small scale, but non linearities prevent the systems from expanding infinitely,[clarification needed] but do so without reaching equilibrium. Synonyms & Antonyms of positive | (Entry 2 of 2). For example, beginning at the macro level, Alfred J. Lotka (1945) argued that the evolution of the species was most essentially a matter of selection that fed back energy flows to capture more and more energy for use by living systems. 2. This effect is called hysteresis: the input voltage has to drop past a different, lower threshold to 'un-latch' the output and reset it to its original digital value. Positive feedback is a form of evaluation that focuses on an employee's strengths, talents and accomplishments. An amplifier that is stable in one set of conditions can break into parasitic oscillation in another. The oscillation that can break out in a regenerative radio circuit is used in electronic oscillators. When you provide positive feedback, you are telling your team members what they're doing correctly and should continue to do. Nglish: Translation of positive for Spanish Speakers, Britannica English: Translation of positive for Arabic Speakers. In P. Millar & C. Stringer (Eds. adjective. ['pztv'] involving advantage or good. "Positive Feedbacks in the Economy". Alexander, R. (1989). [2] System parameters will typically accelerate towards extreme values, which may damage or destroy the system, or may end with the system 'latched' into a new stable state. With a SensagentBox, visitors to your site can access reliable information on over 5 million pages provided by Sensagent.com. Once it reaches the limit, it will be stable. Noun Phrase An approval of something as being of a satisfactory standard (physics) A feedback loop in which the output of a system is amplified with a net positive gain Noun Encouragement, typically used to reinforce a person's behavior encouragement cheering emboldening motivation stimulation spurring morale boosting spiriting up shot in the arm cheering on 'Positive', 'Cheat', and 7 Other Words Positive. Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/positive. approval. Noun Phrase Devote equal time to positive and negative feedback. A simple feedback loop is shown in the diagram. ['pztv'] involving advantage or good. Dolgonosov. Positive feedback is used in digital electronics to force voltages away from intermediate voltages into '0' and '1' states. Choose the design that fits your site. Winner, E. (1996). [17] Computer random access memory (RAM) can be made in this way, with one latching circuit for each bit of memory. you're always so cocksure about everything. Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. The terms "positive/negative" were first applied to feedback prior to WWII. ['fidbk'] the process in which part of the output of a system is returned to its input in order to regulate its further output. Examples of positive feedback subsystems in climatology include: A self-fulfilling prophecy is a social positive feedback loop between beliefs and behavior: if enough people believe that something is true, their behavior can make it true, and observations of their behavior may in turn increase belief. Change the target language to find translations. 114120, Jan. 1934. Thesaurus / feedback FEEDBACK feedback See definition of feedback on Dictionary.com noun response synonyms for feedback Compare Synonyms assessment comment criticism evaluation observation reaction answer comeback rebuttal reply retaliation sentiment antonyms for feedback MOST RELEVANT question Boggle gives you 3 minutes to find as many words (3 letters or more) as you can in a grid of 16 letters. When more people are encouraged to join a network this increases the reach of the network therefore the network expands ever more quickly. Learn a new word every day. adjective. Bistability, Epigenetics, and Bet-Hedging in Bacteria. Agriculture and human population can be considered to be in a positive feedback mode,[41] which means that one drives the other with increasing intensity. By the use of tuned circuits or a piezoelectric crystal (commonly quartz), the signal that is amplified by the positive feedback remains linear and sinusoidal. This risk is more likely as the complexity of the system increases, because it becomes more difficult to see or analyze all the possible combinations of variables in the system even under careful stress testing conditions. Synonyms for positive admiring, applauding, appreciative, approbatory, approving, commendatory, complimentary, favorable, friendly, good Words Related to positive accepting, warm encomiastic, eulogistic, flattering, hagiographic (also hagiographical), laudative, laudatory, panegyrical, praiseful respectful, supportive, sympathetic adoring, Record deck pickup cartridges can do the same, usually in the low frequency range < 100Hz, manifesting as a low rumble. The result of positive feedback is to amplify changes, so that small perturbations may result in big changes. (1981). ), Donella Meadows' twelve leverage points to intervene in a system, http://books.google.co.uk/books?id=a1gW4uV-q8EC&pg=PA42, http://books.google.com/books?id=REzmYOQmHuQC&pg=PA55, http://books.google.com/books?id=lROa-MpIrucC&pg=PA247, http://books.google.com/books?id=uah1PkxWeKYC&pg=PA276, http://books.google.com/books?id=0lPmEchB26AC&pg=PA235, http://books.google.co.nz/books?id=sExvSbe9MSsC, "A SHORT WAVE REGENERATIVE RECEIVER PROJECT", http://www.electronics-tutorials.com/receivers/regen-radio-receiver.htm, http://www.educypedia.be/electronics/analogosciltypes.htm, http://books.google.com/books?id=Qpmi4ia2nhcC&pg=PA254&lpg=PA254#v=onepage&q&f=false, "CMOS Schmitt TriggerA Uniquely Versatile Design Component", http://www.fairchildsemi.com/an/AN/AN-140.pdf, http://www.labri.fr/perso/strandh/Teaching/AMP/Common/Strandh-Tutorial/flip-flops.html, http://www.electronics-tutorials.ws/sequential/seq_1.html, "Analog Electronics Lecture 4 Part C RC coupled Amplifier Design Procedure", http://www.brianmayguitars.co.uk/accessories/19, Phanerozoic marine biodiversity follows a hyperbolic trend // Palaeoworld. 3. When an input voltage is expected to vary in an analogue way, but sharp thresholds are required for later digital processing, the Schmitt trigger circuit uses positive feedback to ensure that if the input voltage creeps gently above the threshold, the output is forced smartly and rapidly from one logic state to the other. Positive feedback can also occur in other forms of cell signaling, such as enzyme kinetics or metabolic pathways. Bernard P. Zeigler, Herbert Praehofer, Tag Gon Kim Section (2000). noun. You can also try the grid of 16 letters. By reducing the extent of the positive feedback, the hysteresis-width can be reduced, but it can not entirely be eradicated. Positive feedback is communication that highlights a person's strengths and achievements. B.M. ['pztv'] persuaded of; very sure. Jimi Hendrix helped to develop the controlled and musical use of audio feedback in electric guitar playing,[20] and later Brian May was a famous proponent of the technique.[21]. If devices have to be used near to their maximum power-handling capacity, and thermal runaway is possible or likely under certain conditions, improvements can usually be achieved by careful design. | Privacy Settings, absolute, actual, affirmative, categorical, certain, clear, clear-cut, conclusive, concrete, decisive, definite, direct, explicit, express, firm, incontrovertible, indisputable, real, unequivocal, unmistakable, assured, certain, confident, convinced, sure, assertive, cocksure, decided, dogmatic, emphatic, firm, forceful, opinionated, peremptory, resolute, stubborn, beneficial, constructive, effective, efficacious, forward-looking, helpful, practical, productive, progressive, useful, absolute, complete, consummate, out-and-out, perfect, rank, thorough, thoroughgoing, unmitigated, utter, contestable, disputable, doubtful, inconclusive, indecisive, indefinite, uncertain, not confident, unassured, uncertain, unconvinced, unsure, diffident, open-minded, receptive, retiring, timid, unassertive, unobtrusive, conservative, detrimental, harmful, impractical, reactionary, unhelpful, useless, "Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 HarperCollins Publishers 1995". Find 87 ways to say POSITIVE, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus. It has been suggested that the similarity between the curves of biodiversity and human population probably comes from the fact that both are derived from the interference of the hyperbolic trend (produced by the positive feedback) with cyclical and stochastic dynamics. One of the corollaries of the Schmitt trigger's use of positive feedback is that, should the input voltage move gently down again past the same threshold, the positive feedback will hold the output in the same state with no change. Type the word that you look for in the search box above. These parameters also become less dependent on the details of the amplifying device itself, and more dependent on the feedback components, which are less likely to vary with manufacturing tolerance, age and temperature. Cultural anthropology: A contemporary perspective (2nd ed.) adjective. Wildcard, crossword These factors amount to an inefficiency, but they are necessary to avoid instabilities. [13] Therefore a signal can be amplified 20,000 or even 100,000 times in one stage, that would normally have a gain of only 20 to 50. Electronics circuits and devices second edition. While all these words mean "having no doubt or uncertainty," positive intensifies sureness or certainty and may imply opinionated conviction or forceful expression of it. The problem with regenerative amplifiers working at these very high gains is that they easily become unstable and start to oscillate. Nature (420), pp. Ben Zuckerman and David Jefferson (1996). 2. positive adjective. What's the definition of Positive feedback in thesaurus? C. define positive feedback. [2], In positive feedback, the derivative of the variable is positively affected by the variables value, and the opposite is true in negative feedback.[2]. The law of evolution as a maximal principle. According to Donella Meadows: Hysteresis can be generated by positive feedback. A viral video is an example of the network effect in which links to a popular video are shared and redistributed, ensuring that more people see the video and then re-publish the links. H.S. 1.feedback in phase with (augmenting) the input, ce qui agit sur qqch et produit un effet (fr)[Classe], processus d'autorgulation (fr)[ClasseParExt. The radio operator has to be prepared to tweak the amount of feedback fairly continuously for good reception. Bikini, bourbon, and badminton were places first. The flip-flop uses a pair of amplifiers, transistors, or logic gates connected to each other so that positive feedback maintains the state of the circuit in one of two unbalanced stable states after the input signal has been removed, until a suitable alternative signal is applied to change the state. [1] That is, A produces more of B which in turn produces more of A. Negative feedback effects within the same system can also modulate the effect of positive feedback so that it may add to the responsiveness of the system but does not necessarily lead to a runaway process. Chemicals break down the blood clot. The effects are usually catastrophic for the device in question. Friis,H.T., and A.G.Jensen. Regenerative circuits were invented and patented in 1914[12] for the amplification and reception of very weak radio signals. If the loop gain (the product of the amplifier gain and the extent of the positive feedback) at any frequency is greater than one, then the amplifier will oscillate at that frequency (Barkhausen stability criterion). The web service Alexandria is granted from Memodata for the Ebay search. [14], Many electronic circuits, especially amplifiers, incorporate negative feedback. According to Black: According to Mindell (2002) confusion in the terms arose shortly after this: In feedback loops a chain of cause and effect exists where a state variable of a system has a feedback loop influencing its own rate of change. [32] Crespi (2004) discussed several other examples of positive feedback loops in evolution. The hyperbolic character of biodiversity growth can be similarly accounted for by a positive feedback between the diversity and community structure complexity. Vandervert (2009a, 2009b) proposed that the child prodigy can be explained in terms of a positive feedback loop between the output of thinking/performing in working memory, which then is fed to the cerebellum where it is streamlined, and then fed back to working memory thus steadily increasing the quantitative and qualitative output of working memory. 295-316). Positive feedback Positive feedback synonyms regeneration positive feedback and regeneration plaudit positive feedback and plaudit feedback positive feedback and feedback kudo positive feedback and kudo compliment positive feedback and compliment cheer positive feedback and cheer approbation positive feedback and approbation ovation The Journal of Mind and Behavior, 30, 15-32. [6] In contrast, a system that has negative gain around the loop has negative feedback.[1][2]. ['pztv'] formally laid down or imposed. ['pztv'] a film showing a photographic image whose tones correspond to those of the original subject. W. Brian Arthur, 1990)[40]. [35], A cytokine storm, or hypercytokinemia is a potentially fatal immune reaction consisting of a positive feedback loop between cytokines and immune cells, with highly elevated levels of various cytokines.[36]. Simple systems that clearly separate the inputs from the outputs are not prone to systemic risk. When the gain of the feedback loop is above 1, then the output moves away from the input, if it is above the input, then it moves towards the nearest positive limit, if it is below the input then it moves towards the nearest negative limit. Lotka, A. Volume 16, Issue 4, December 2007, Pages 311-318, Hyperbolic growth of marine and continental biodiversity through the Phanerozoic and community evolution // Journal of General Biology. In many cases population size is the limiting factor to the feedback effect. Negative feedback is the opposite as it focuses on what they did wrong or need to improve. The Netherlands: Springer Science. Genetic engineers have constructed and tested simple positive feedback networks in bacteria to demonstrate the concept of bistability. The hyperbolic pattern of the world population growth has been demonstrated (see below) to arise from a second-order positive feedback between the population size and the rate of technological growth. positive feedback > synonyms. Thus depending on the feedback, state changes can be convergent, or divergent. Definitions of Positive_feedback, synonyms, antonyms, derivatives of Positive_feedback, analogical dictionary of Positive_feedback (English) On the other hand, thermal runaway is a positive feedback that can destroy semiconductor junctions. 15 Positive feedback Synonyms. adjective. Such oscillations are sometimes called parasitic oscillations. A number of examples of positive feedback systems may be found in physiology. It may not have been reviewed by professional editors (see full disclaimer). Hence, on earth the gain of the overall system is always less than one, stopping the system from suffering runaway effects. In electrical switches, including bimetallic strip based thermostats, the switch usually has hysteresis in the switching action. 224-230. They all use positive feedback to create oscillations. A daily challenge for crossword fanatics. Synonyms for positive feedback loop include reflexivity and circular relationship. Di, Cookies help us deliver our services. How to use a word that (literally) drives some pe Editor Emily Brewster clarifies the difference. [43](p146), Gunnar Myrdal described a vicious circle of increasing inequalities, and poverty, which is known as "circular cumulative causation".[44]. [37] Winner termed this positive feedback loop as a "rage to master." ], feed back, resubmit - positive feedback, positive feed-back, regeneration[Driv], Knowledge of Results, Knowledge of Results (Psychology)[Analogie], Positive feedback (or regenerative feedback) occurs in a feedback loop when the mathematical sign of the net gain around the feedback loop (sometimes called the loop gain) is positive. If a microphone picks up the amplified sound output of loudspeakers in the same circuit, then howling and screeching sounds of audio feedback (at up to the maximum power capacity of the amplifier) will be heard, as random noise is re-amplified by positive feedback and filtered by the characteristics of the audio system and the room. When a change occurs in a system, positive feedback causes further change, in the same direction. Synonyms Similar meaning. Lactation stops when the baby no longer nurses. ['ngtv'] characterized by or displaying negation or denial or opposition or resistance; having no positive features. Shavinina (Ed. ], (precede), (press showing; preview), (past; past times; yesteryear; ancient times; antiquity), (predecessor; forerunner)[termes lis], action, activity, natural action, natural process - Cybernetics - add to, augment, boost, broaden, enlarge, expand, heighten, increase, raise, turn up, up, widen[Hyper. The more efficient a complex system is, the more likely it is to be prone to systemic risks, because it takes only a small amount of deviation to disrupt the system. positive comments. adjective. favourable response. Contact Us regeneration. Another sociological example of positive feedback is the network effect. ['fidbk'] response to an inquiry or experiment. Get XML access to fix the meaning of your metadata. 175194, "Circular Cumulative Causation (CCC) la Myrdal and Kapp Political Institutionalism for Minimizing Social Costs", http://www.kwilliam-kapp.de/pdf/Circular%20Cumulative%20Causation%20a%20la%20Myrdal%20&%20Kapp.pdf, http://en.wikipedia.org/w/index.php?title=Positive_feedback&oldid=499525545, A warmer atmosphere will melt ice and this changes the, Methane hydrates can be unstable so that a warming ocean could release more, Praise of performance: a term often applied in the context of, Self-reinforcing feedback: a term used in. [2], Such systems can give rich qualitative behaviors, but whether the feedback is positive or negative in sign is an extremely important influence on the results.
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