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Topic: Feedback cycles

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positive feedback

linear feedback shift registers

feedback loops

Feedback 2004 album

audio feedback

feedback inhibition

force feedback

negative feedback loop

feedback amplifier

Soma to germline feedback

feedback cycles

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	Feedback - Wikipedia, the free encyclopedia
		Feedback may be negative, which tends to reduce output, (but in amplifiers, stabilises and linearises operation), or positive, which tends to increase output.
		Negative feedback is often deliberately introduced to increase the stability and accuracy of a system, as in the feedback amplifier invented by Harold Stephen Black.
		In zymology, feedback serves as regulation of activity of an enzyme by its direct product(s) or downstream metabolite(s) in the metabolic pathway.
	en.wikipedia.org /wiki/Feedback (1482 words)

	An Evaluation of Flare Cycles
		The symptoms are severe and their occurrence is indicative of an undamped feedback oscillation of the immune system as long as the oscillation is not synchronous with the menstrual cycle (i.e.
		Over a period of several menstrual cycles with symptomatic luteal phases (a and b), the severity and frequency of the symptoms decrease considerably.
		The synchronization of symptom and menstrual cycle is interpreted modelwise as indicating a significant decrease of the pathogen populations in the niches.
	www.lymenet.de /symptoms/cycles/evalsum.htm (1380 words)

	United States Patent Application: 0040117697
		All feedback cycles in a circuit network which cross only non-scannable memory elements are detected in linear run time.
		An illegal feedback loop is detected by the count analyzer 122 if the second node that the first node intersects is a predecessor of the current logic block, and if there is no scannable element between the first node and the second node that would make the feedback legal.
		The output of the scannable latch 220 is inverted by the inverter 225.
	appft1.uspto.gov /netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=/netahtml/PTO/srchnum.html&r=1&f=G&l=50&s1="20040117697".PGNR.&OS=DN/20040117697&RS=DN/20040117697 (6999 words)

	Feedback (Site not responding. Last check: 2007-09-15)
		Feedback is observed or used in various areas dealing with complex systems, such as engineering, economics, and biology.
		Feedback may be negative, which tends to reduce output, or positive, which tends to increase output.
		Feedback is designed into many electronic and other technical devices.
	www.worldhistory.com /wiki/F/Feedback.htm (1417 words)

	Feedback in Business Cycles
		However, the idea of feedback that is present in most of them remains a key idea in economics.
		A amplifying feedback loop is at the center of Keynesian economic theory, the subject of the next chapter.
		Given the amplifying feedback loop at its center, it is no surprise that Keynesian economics sees the economy as unstable when left to itself.
	www.saintjoe.edu /~bobs/econ/Cycles/feedback.htm (807 words)

	Compartment Model Displaying Symptom Cycles
		Cycle 1: As long as the niche heavily injects part of its content into the compartment visible to the immune system, the system is locked in self-organized feedback control cycles.
		It is important that the severity of symptoms decreases during this repetitive process, otherwise the reappearance of cycles would signal a failure to eradicate the Bb source (and with it the Bb niche population), as is exemplified in the upper diagram of Fig.
		After the long therapy with cephalosporins the flare cycles synchronize with the menstrual cycle of the patient, the symptoms occurring predominantly in the luteal phase, in which the level of the proinflammatory prostaglandin E2 is elevated (Leslie et al 1994).
	www.lymenet.de /symptoms/cycles/models.htm (7589 words)

	[No title]
		Definition A feedback cycle is a double set of mathematical objects connected with operators with the following properties: -Any two objects of the first set generate one object of the second set, and any two objects of the second set generate one object of the first set.
		If we take the vectors connected to the points of the feedback cycle we will obtain a system in which the informational values of the points are enriched by composing the vectors functions of the cycle from the first one to the point characterizing one characteristic of the feed back.
		If we interfere the group of generators of one feedback complex cycle developed on a set with another group of generators of a feedback cycle developed on another set, we will obtain connections that are not even cycles with 1f on composition, but with rules in development.
	www.austega.com /florin/CellularAutomataAlgebraicFractals.doc (6344 words)

	LOGICAL ARGUMENTS
		Negative feedback is an example of Nature correcting itself, since negative feedbacks act to reverse the change which was originally set into motion.
		In the short-term meteorological view, a statically stable vertical distribution of temperature, or a baroclinically stable meridional distribution of temperature, will generally remain somewhat benign until the energy build-up is such as to strengthen the temperature gradients driving them to a state of instability.
		Positive feedback is an example of Nature undergoing more drastic change, since positive feedbacks act to enhance the changes which are occuring, rather than to suppress them.
	www.atmos.umd.edu /~owen/CHPI/LOGIX/lxarg006.htm (791 words)

	Fire and Savannization
		This process, known as Savannization, is key to understanding the fragile balance of the savanna/forest boundary as well as the mechanisms that may trigger a runaway expansion of the savanna, and retraction of the edges of the Amazon rainforest.
		This would certainly lead to negative impacts on biodiversity, diminish the amount of biomass stored in the forests, and would reduce the quantity of water liberated from the soil and returned to the atmosphere by vegetation, which is necessary to maintain the hydrologic cycle and climate of the region.
		One potential scenario is that the expansion of the agricultural frontier into Amazonia could stimulate forest conversion to cattle pasture, subsistence farming and conventional, high-impact logging.
	www.whrc.org /southamerica/fire_savann.htm (1169 words)

	Greenhouse effect -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-09-15)
		The surface of the Earth is in constant flux with daily, yearly, and ages long cycles and trends in temperature and other variables from a variety of causes.
		The result of the greenhouse effect is that average surface temperatures are considerably higher than they would otherwise be if the earth's surface temperature were determined solely by the (The ratio of reflected to incident light) albedo and flbody properties of the surface.
		The degree of the greenhouse effect is dependent primarily on the concentration of (A gas that contributes to the greenhouse effect by absorbing infrared radiation) greenhouse gases in the planetary atmosphere.
	www.absoluteastronomy.com /encyclopedia/g/gr/greenhouse_effect.htm (1830 words)

	Indicator: Data-Driven Decision Making and Accountability
		Cybernetics—the science of control and communication in purposeful systems developed by Norbert Wiener in the 1940s—and systems theory have been applied with great effect in the fields of computer science and communications and are now penetrating mainstream thought and practices in other sectors.
		Scores on standardized achievement tests typically have been of little use to educators, as the turnaround time is slow and students have moved on, or the data is aggregated and yields little information about what practices and factors produce better scores.
		Feedback is not only useful for improving student performance but can be used to enhance teacher performance as well.
	www.ncrel.org /engauge/framewk/sys/data/sysdatra.htm (659 words)

	Ovid: Science, Volume 263(5153).March 18, 1994.1578-1584
		A tenet of chronobiology is that feedback is central to the generation of circadian rhythms [11].
		Although feedback regulation of these genes was suspected, the first reported cycling of a candidate clock component involved the PER protein [14], which was then extended to the per transcript [15].
		Because frq was a central component in this feedback loop, and mutations in frq lead to alterations in the circadian clock [2], frq is a candidate for being or encoding a state variable in the circadian oscillator.
	www.dartmouth.edu /~jdunlap/Pubs/Science1.html (7324 words)

	Life and Biogeochemical Cycles (Site not responding. Last check: 2007-09-15)
		On a shorter time-scale, the sedimentary cycle includes the processes of physical or chemical erosion, nutrient transport, and sediment formation for which water flows are mostly responsible.
		Both the hydrological and sedimentary cycles are intertwined with the distribution of the amounts and flows of six important elements - hydrogen, carbon, oxygen, nitrogen, phosphorus, and sulfur.
		The carbon cycle includes four main reservoirs of stored carbon: as CO2 in the atmosphere; as organic compounds in living or recently dead organisms; as dissolved carbon dioxide in the oceans and other bodies of water; and as calcium carbonate in limestone and in buried organic matter (e.g.
	essp.csumb.edu /esse/climate/climatebiogeo.html (2017 words)

	To be and not to be: (Site not responding. Last check: 2007-09-15)
		Whether feedback is defined as positive or negative depends on whether fluctuation are increased or reduced in such situations.
		Ongoing positive feedback cycles in this situation would result in chaotic behavior, behavior, that is, where fluctuation is extreme, and interactive behavior becomes highly unpredictable as far as 'lovingness' is concerned (Koopmans, 1998a).
		The feedback cycles through which this self-affirmation process takes place do not only distinguish a family system from its larger systemic context, but also distinguish subsystems within the family, such as spousal and siblings alliances.
	www.goertzel.org /dynapsyc/1998/KoopmansPaper.htm (8707 words)

	Ascendancy, Cycles & Feedback :: Digital Identity World :: Digital Identity, Digital ID
		Another macro cycle affecting identity is that the economy has been booming for a couple of years now, but it has been doing so against a background of continual skepticism about how long that will continue.
		And thanks to M&A being driven by the economic cycle, the larger companies in the identity industry are starting to integrate some of the innovation that has occurred in smaller companies over the past few years while more innovation is being encouraged and funded.
		Those companies that latch onto these cycles as their reasons for being, or who think the M&A cycle will continue long enough that they can hold out for much bigger acquisition prices or more, better, offers will find that cycles go up, cycles go down, and cycles change.
	www.digitalidworld.com /modules.php?op=modload&name=News&file=article&sid=271 (1206 words)

	How The Mind Chapter 6
		The first of these cycles is caused by an old habit that many people have of trying to justify or rationalize the emotions that they are feeling.
		The cycle of negative feelings or emotions can be broken at several points using the same techniques discussed in previous chapters.
		You can break the vicious cycle by disidentifying (that is, remembering our separateness from) with either the feelings and emotions, or with the thoughts which then feed them (or with both).
	members.aol.com /way4th/hmch6.htm (2341 words)

	Alignment - The Opportunity (Site not responding. Last check: 2007-09-15)
		When this trust is deepened through repeated feedback cycles, a group will build its way up through the levels as shown here...
		A feedback cycle (the “engine” of the process) is made up of a presentation, group feedback to the presentation, and then a clarifying response by the presenter to the group’s core questions or concerns.
		As each presentation is delivered and the group effectively engages in a “dialogue” with the presenter, there comes a recognition in the room – in the leaders and participants alike – that “we understand each other” on this question and we can move on to what’s next.
	www.covision.com /alignment (503 words)

	MILANKOVICH CYCLES, POSITIVE FEEDBACK AND SYSTEM SWITCHING BETWEEN STABLE STATES, A MODEL FOR GLACIAL - INTERGLACIAL ... (Site not responding. Last check: 2007-09-15)
		For example, when a coupling causing feedback has the mathematical form of a logistics curve, the system may contain three steady states, two stable and one unstable that separates regions of stability.
		The model suggests that feedbacks involving, temperature, ice, albedo, carbon dioxide and energy transfer between tropics and polar regions are able to enhance the effects of the Milankovitch cycle.
		The strength of feedback is relatively weak during glacial maxima and minima but strengthens during periods of ice advance and retreat.
	gsa.confex.com /gsa/2003AM/finalprogram/abstract_58881.htm (439 words)

	Endocrine System And Negative Feedback \| Your reference guide for Endocrine System And Negative Feedback and more. (Site not responding. Last check: 2007-09-15)
		The negative feedback of cortisol on the hypothalamus is lost...
		Conventional hormone substitution is insufficient because of the negative feedback...
		A negative feedback system causes a reversal of increases and decreases in body conditions in order to maintain a state of stability or homeostasis.
	www.pajournal.com /EndocrineSystem/endocrinesystemandnegativefeedback (714 words)

	Message
		Feedback and chaos in Darwinian evolution, Part I: Theoretical considerations.
		If-then rules just do not have the conditions of a cybernetic loop; it assumes only that this causes that, and not the issue of reciprocity which is so important in the biological sense and also in the human cognitive sense (information).
		If-then = rules=20 just do not have the conditions of a cybernetic loop; it assumes only = that=20 this causes that, and not the issue of reciprocity which is so = important in=20 the biological sense and also in the human cognitive sense = (information).
	necsi.org:8100 /Lists/complex-science/Message/4682-P.txt (2595 words)

	I.3. Advisors and Advising
		In turn, you may expect reasonable feedback from your advisor on the work that you have already done; it is important to work out as soon as possible what is kind of feedback is most useful to each of you.
		Feedback is a central element of both your role and your advisor's role in the relationship.
		Written feedback can be important to both you and your advisor as a "paper trail," in the event that one or the other of you is dissatisfied later on.
	www.southampton.liunet.edu /fw/portfolio_resource_guide/i3.htm (1030 words)

	Bicycle Touring 101: Circle City Cycles Offer Feedback
		Based on feedback that I have been receiving their help has gone a long ways towards creating a web site that has lots of bicycle touring information while also preserving the whole sense of what bicycle touring is all about.
		The Circle City Cycles offer is relatively new and it appeared on the site right after Christmas during the traditional "no money" time of year so only recently have contributors begun to take advantage of the offer.
		Nancy Bradbury is preparing for a bicycle tour later this year and she used the offer to pick up some new Arkel panniers.
	www.bicycletouring101.com /CircleCityCyclesOfferFeedback.htm (605 words)

	Nutrients Lecture
		Feedback: The quantity in the pool of a subsystem affects the behavior of that subsystem.
		Biogeochemistry: the study of biogeochemical cycles: movement of elements or compounds through living organisms and nonliving environment.
		The Oxygen cycle is driven by PS and R and is coupled with the carbon cycle (and hence energy flow).
	www.okstate.edu /artsci/botany/bisc3034/lnotes/nutrient.htm (897 words)

	the endocrine system
		Biological cycles ranging from minutes to years occur throughout the animal kingdom.
		Cycles involve hibernation, mating behavior, body temperature and many other physiological processes.
		Rhythms or cycles that show cyclic changes on a daily (or even a few hours) basis are known as
	www.estrellamountain.edu /faculty/farabee/biobk/BioBookENDOCR.html (1668 words)

	Cycles Module (Site not responding. Last check: 2007-09-15)
		Cycles of the Earth and Atmosphere examines the cycles that combine to create the complex atmosphere and climate of earth.
		The module includes an explanation of the Gaia hypothesis as a starting point for discussion about cycles, feedback loops, and the study of earth as a single system.
		Information about current research on climate change supplements activities in which students model the cycles, experiment with the properties of water, calculate how many trees are necessary to absorb excess carbon dioxide, and unleash dinosaur breath.
	www.ncar.ucar.edu /ASR96/ASR96education/ASR96/cycles9.html (222 words)

	Simple Models of Climate
		Chamberlin's novel hypothesis was that ice ages might follow a self-oscillating cycle driven by feedbacks involving CO The gas was originally injected into the atmosphere in spates of volcanic activity.
		By the 1980s, the strangely regular cycles of ice sheet advance and retreat over the past several hundred thousand years were well determined, thanks to cores drilled from seabeds and icecaps.
		Scientists who took up the old challenge of explaining the cycles had no recourse but simple models — a few equations including the time-delay for laying down and melting ice sheets, plus feedbacks such as changes in the level of CO in the atmosphere.
	www.aip.org /history/climate/simple.htm (13976 words)

	Digital Identity World
		Identity is on the ascendancy, and while much of this has to do with the evolution of identity technology itself, much of it also has to do with larger cycles that are happening in the world that are causing identity to "get a push" from things not directly related to it.
		So thanks to the regulatory cycle, identity has a higher purpose that management understands it must meet.
		Pharming is another potential way to mount identity theft attacks on the internet, and if we don't solve phishing the right way (which so far we're not) then whatever we do won't really reduce the total fraud impact.
	www.digitalidworld.com /print.php?sid=262 (1820 words)

	The runaway weight gain train: too many accelerators, not enough brakes -- Swinburn and Egger 329 (7468): 736 -- BMJ
		A vicious cycle is a positive feedback loop in which the problem
		cycles, outlined in the table and explained below, seem to be
		Dulloo AG, Jacquet J, Girardier L. Poststarvation hyperphagia and body fat overshooting in humans: a role for feedback signals from lean and fat tissues.
	bmj.bmjjournals.com /cgi/content/full/329/7468/736 (1824 words)

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