Talk:Positive feedback
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[edit] In biology
One example of a biological positive feedback loop is the onset of contractions in childbirth. When a contraction occurs, the hormone oxytocin is released into the body, which stimulates further contractions. This results in contractions increasing in amplitude and frequency.
Another example of a biological positive feedback loop is the process of blood clotting. The loop is initiated when injured tissue releases signal chemicals which activate platelets in the blood. An activated platelet releases chemicals which activate more platelets, causing a rapid cascade and the formation of a blood clot.
In most cases, once the purpose of the feedback loop is completed, counter-signals are released which suppress or break the loop.}}
[edit] Suggested graphical example
Hello, I once saw a nice example for understanding types of feedback that I think would be great to see on this page. There were three images displaying a cone on a flat base. On the first, the cone was standing on its base showing negative feedback (or stable equilibrium). On the second, the cone was standing on its apex showing positive feedback (unstable equilibrium). On the third, the cone was lying on its side as an example of no feedback (indiferential equilibrium). --Anonymous —Preceding unsigned comment added by 89.212.6.152 (talk) 05:45, 21 September 2007 (UTC)
[edit] The author of this article
hello, i was just wondering who the author of this article is? i need to know for referencing the information for my essay. thank-you very much. my e-mail is teenateichroeb@yahoo.com
- Greetings. There is rarely any one author per se on any given Wikipedia article. I direct you to this page which talks about the best way to go about citing Wikipedia. Have fun! RadicalBender 16:35, 8 Mar 2004 (UTC)
[edit] games?
I don't understand the gaming examples. --Abdull 21:33, 21 July 2005 (UTC)
- I'm not sure how to improve the explanation. The idea is that there's an "upward spiral", where improvement in the player's position leads to more and more rapid improvement. Please feel free to edit it, or maybe visit your bookstore and take a look at the source, Rules of Play. Deco 03:55, 23 July 2005 (UTC)
- These might be good examples in gaming but they're not very good examples. Why do we need examples specifically from gaming anyway? I think the rest of the article does fine. Deleting. Every name is taken12345 09:22, 4 April 2007 (UTC)
surely this gaming example is trivial. It adds nothing, so I'm removing it. —Preceding unsigned comment added by 85.134.134.152 (talk • contribs)
[edit] Correlation is not causation - amendment to World System section
Originally this read as:
"The hyperbolic growth of the world population observed till the 1970s has been recently shown to be accounted for by a non-linear second order positive feedback between the demographic growth and technological development..."
This is a very strong statement. It implies that the argument put forward in Korotayev is an objective fact rather than a well-supported hypothesis. I have, therefore, changed “to be accounted for” to the uncontentious “correlated to”.
I also made minor amendments to remove the passive voice.
--Roger Mexico 15:54, 20 September 2006 (UTC)
This statement is a theory and should not be part of a description of fact:
"An example of this is the role of water vapour in amplifying global warming; higher global temperatures lead to increased water vapour in the atmosphere, which pushes up temperatures further, and so on, but the overall effect is that of a convergent series, amplifying the original temperature rise by a relatively constant factor. The limiting control is that water vapour does not depend solely upon temperature. Water cycles in and out of the atmosphere for a variety of reasons."
-Posted May 2008
Removed statement - May 2008