Positive feedback (exacerbating feedback, self-reinforcing feedback) is a process that occurs in a feedback loop which exacerbates the effects of a small disturbance. That is, the effects of a perturbation on a system include an increase in the magnitude of the perturbation. That is, A produces more of B which in turn produces more of A. In contrast, a system in which the results of a change act to reduce or counteract it has negative feedback. Both concepts play an important role in science and engineering, including biology, chemistry, and cybernetics. Mathematically, positive feedback is defined as a positive loop gain around a closed loop of cause and effect.That is, positive feedback is in phase with the input, in the sense that it adds to make the input larger.Positive feedback tends to cause system instability. When the loop gain is positive and above 1, there will typically be exponential growth, increasing oscillations, chaotic behavior or other divergences from equilibrium. 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. 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. Positive feedback is used in digital electronics to force voltages away from intermediate voltages into '0' and '1' states. On the other hand, thermal runaway is a type of positive feedback that can destroy semiconductor junctions. Positive feedback in chemical reactions can increase the rate of reactions, and in some cases can lead to explosions. Positive feedback in mechanical design causes tipping-point, or 'over-centre', mechanisms to snap into position, for example in switches and locking pliers. Out of control, it can cause bridges to collapse. Positive feedback in economic systems can cause boom-then-bust cycles. A familiar example of positive feedback is the loud squealing or howling sound produced by audio feedback in public address systems: the microphone picks up sound from its own loudspeakers, amplifies it, and sends it through the speakers again. (Wikipedia).
Learn more about how to give feedback in the workplace at: https://www.mindtools.com/pages/article/newTMM_98.htm?utm_source=youtube&utm_medium=video&utm_campaign=givingfeedback&utm_content=description When you give feedback to members of your team, is it a positive process, or is it one
From playlist Business Communication
Feedback is critical for learning, but not all feedback is created equal. Consider evaluative feedback, in which a student is told they are right or wrong. This can be easiest to give but frustrating or unhelpful to receive. In this session, we’ll consider alternatives, especially ones tha
From playlist Webinars While We're Away
Feedback (quick & lots of it) and the End of Theory
From the mediaX Conference "Science & Technology of Feedback": Byron Reeves discusses his research on human computer interaction and how emerging technologies have enabled the collection of innumerable data points from one individual. The ubiquitous availability of feedback influences th
From playlist Science and Technology of Feedback
From the mediaX Conference "Science & Technology of Feedback": Nik Martelaro shares his research into feedback from active social agents. The experiment began with the question, “What if the thing that is being created takes the role of an active social agent in the creative experience its
From playlist Science and Technology of Feedback
If you are interested in learning more about this topic, please visit http://www.gcflearnfree.org/ to view the entire tutorial on our website. It includes instructional text, informational graphics, examples, and even interactives for you to practice and apply what you've learned.
From playlist Critical Thinking
How To Deal With Negative Comments From Family & Friends
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Personalization of Continuous Feedback
From the mediaX Conference "Science & Technology of Feedback": Maurits Kaptein explores how various online persuasion strategies influence different people. The ubiquitous availability of feedback influences theory and practice. It impacts our perceptions of ourselves, and of others, as
From playlist Science and Technology of Feedback
From the mediaX Conference "Science & Technology of Feedback": Renate Fruchter describes her research into the power of feedback to stimulate engagement, productivity and wellness in the workplace – particularly in the context of remote collaborations. The ubiquitous availability of feedb
From playlist Science and Technology of Feedback
MIT RES.TLL-004 Concept Vignettes View the complete course: http://ocw.mit.edu/RES-TLL-004F13 Instructor: Leah Okumura This video discusses negative and positive feedback loops, how they tie into the bodyäó»s mechanism of internal regulation, and what happens when these mechanisms fail.
From playlist MIT STEM Concept Videos
AlterConf Melbourne 2017: Feedback matters by Elle Meredith
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ETH Lecture 05. Systems Dynamics I: Modelling (20/10/2011)
Course: Systems Dynamics and Complexity (Fall 2011) from ETH Zurich. Source: http://www.video.ethz.ch/lectures/d-mtec/2011/autumn/351-0541-00L.html
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Positive and Negative Feedback Loops
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From playlist AP Biology Video Essentials
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MIT CMS.608 Game Design, Spring 2014 Instructor: Philip Tan, Richard Eberhardt, MIT Students View the complete course: https://ocw.mit.edu/CMS-608S14 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP63YWzCDORR965yCmHiCKF9Z Effects of the number of players on game play an
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Lecture 25, Feedback | MIT RES.6.007 Signals and Systems, Spring 2011
Lecture 25, Feedback Instructor: Alan V. Oppenheim View the complete course: http://ocw.mit.edu/RES-6.007S11 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
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Lec 21 | MIT 6.002 Circuits and Electronics, Spring 2007
Op amps positive feedback View the complete course: http://ocw.mit.edu/6-002S07 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
From playlist MIT 6.002 Circuits and Electronics, Spring 2007
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From playlist ETH Zürich: Systems Dynamics and Complexity (Fall 2011) | CosmoLearning Mathematics
mod-10 lec-10 Hydraulic Servomechanism and Servo and Proportional Control Valves
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Peer Effects & Feedback in Online Communication
From the mediaX Conference "Science & Technology of Feedback": Dean Eckles presents his research as part of Facebook’s Data Science Team. At Facebook, Eckles explores peer effects - how ideas, images and other elements spread in networks. The ubiquitous availability of feedback influence
From playlist Science and Technology of Feedback