Feedback describes the situation when output from (or information about the result of) an event or phenomenon in the past will influence the same event/phenomenon in the present or future. When an event is part of a chain of cause-and-effect that forms a circuit or loop, then the event is said to "feed back" into itself.
Welcome to CWAnswers
CWAnswers is your guide to the sprawling world wide web. The directory aims to provide a useful guide made by users. You can share your knowledge as well - simply sign up and edit your first entry. For questions just contact the team at support - at - cwanswers.com.
Weblinks for Feedback
Top 10 for Feedback
Things about Feedback you find nowhere else.
Select content modules
The Onion Dome Feedback Blog
skip to main | skip to sidebar. The Onion Dome Feedback Blog. Feedback on The Onion Dome: Orthodox News with a twist. Wednesday, April 01, 2009 ...theoniondome.blogspot.com/Feedback Blog
Feedback Blog. What are your friends and neighbors talking about? ... Posted By Feedback At 12:20 PM • Comments (4) Trackbacks (0) ...www.readingeagle.com/blog.aspx?bid=112Feedback
Matthew Jarpe, science fiction, Radio Freefall, writing, science ... Feedback - A totally interactive science fiction/science fact experience. Matthew Jarpe's blog ...feedback.matthewjarpe.com/Climate Feedback
Climate Feedback is a blog hosted by Nature Reports and was set up to facilitate lively and informative discussion on the science and wider implications of global warming. The blog aims to be an informal forum for debate and commentary on climate science in our journals and others, in the news, and in the world at large.blogs.nature.com/climatefeedback/IEBlog : Announcing Internet Explorer Feedback
Many customers have asked us about having a better way to enter IE bugs. ... There will be an ongoing blog for feedback created in the near term which will ...blogs.msdn.com/ie/archive/2006/03/24/560095.aspxFeedback describes the situation when output from (or information about the result of) an event or phenomenon in the past will influence the same event/phenomenon in the present or future. When an event is part of a chain of cause-and-effect that forms a circuit or loop, then the event is said to "feed back" into itself.
Feedback is also a synonym for:
- Feedback Signal; the information about the initial event that is the basis for subsequent modification of the event.
- Feedback Loop; the causal path that leads from the initial generation of the feedback signal to the subsequent modification of the event.
Overview
Feedback is a mechanism, process or signal that is looped back to control a system within itself. Such a loop is called a feedback loop. Intuitively many systems have an obvious input and output; feeding back part of the output so as to increase the input is positive feedback; feeding back part of the output in such a way as to partially oppose the input is negative feedback.
In more general terms, a control system has input from an external signal source and output to an external load; this defines a natural sense (or direction) or path of propagation of signal; the feedforward sense or path describes the signal propagation from input to output; feedback describes signal propagation in the reverse sense. When a sample of the output of the system is fed back, in the reverse sense, by a distinct feedback path into the interior of the system, to contribute to the input of one of its internal feedforward components, especially an active device or a substance that is consumed in an irreversible reaction, it is called the "feedback". The propagation of the signal around the feedback loop takes a finite time because it is causal.
The natural sense of feedforward is defined chemically by some irreversible reaction, or electronically by an active circuit element that has access to an auxiliary power supply, so as to be able to provide power gain to amplify the signal as it propagates from input to output. For example, an amplifier can use power from its controlled power reservoir, such as its battery, to provide power gain to amplify the signal; but the reverse is not possible: the signal cannot provide power to re-charge the battery of the amplifier.
Feedforward, feedback and regulation are self related. The feedforward carries the signal from source to load.
Negative feedback helps to maintain stability in a system in spite of external changes. It is related to homeostasis. For example, in a population of foxes (predators) and rabbits (prey), an increase in the number of foxes will cause a reduction in the number of rabbits; the smaller rabbit population will sustain fewer foxes, and the fox population will fall back. In an electronic amplifier feeding back a negative copy of the output to the input will tend to cancel distortion, making the output a more accurate replica of the input signal.
























