Results 261 to 270 of about 847,425 (305)

Positive feedback circuits and memory

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie, 2000
The concept of regulatory feedback circuit refers to oriented cyclic interactions between elements of a system. There are two classes of circuits, positive and negative, whose properties are in striking contrast. Positive circuits are a prerequisite for the occurrence of multiple steady states (multistationarity), and hence, they are involved in all ...
Demongeot, Jacques, Kaufman, Marcelle, Thomas, René   +2 more
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Visual Feedback and Positioning Movements

Journal of Motor Behavior, 1975
Subjects (n = 60) performed both the reproduction and learning of a linear positioning movement under one of five visual feedback conditions. Results from two experiments indicated that visual cues from the task display augmented information available from visual feedback of the movement per se.
K M, Newell, R A, Chew
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Feedback information and the reward positivity

International Journal of Psychophysiology, 2018
The reward positivity is a component of the event-related brain potential (ERP) sensitive to neural mechanisms of reward processing. Multiple studies have demonstrated that reward positivity amplitude indices a reward prediction error signal that is fundamental to theories of reinforcement learning. However, whether this ERP component is also sensitive
Cockburn, Jeffrey, Holroyd, Clay B.
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The relationship between positive position feedback and output feedback controllers

Smart Materials and Structures, 1999
The vibration control of structures may be approached in many ways. Often a robust controller is difficult to design as spillover from modes not considered in the controller design can cause the closed loop system to be unstable. One great advantage of positive position feedback (PPF) control is that the frequency response of the controller rolls off ...
Michael I Friswell, Daniel J Inman
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Terrorism: A positive feedback game

Human Relations, 2003
This article offers an approach to political systems in enclaves (i.e. closed, dissident minorities) from the standpoint of Cultural Theory; it seeks to identify different kinds of organized dissent, as well as the constraints facing them, most especially those deriving from manipulation and control of information.
Mary Douglas, Gerald Mars
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Positive feedback in aquatic ecosystems

Trends in Ecology & Evolution, 1992
Aquatic ecosystems offer striking examples of how positive feedback can be integral to the dynamics of complex communities. In particular, microorganisms (bacteria and protozoa) introduce a multitude of positive feedback pathways by rapidly recycling nutrients at the very base of many aquatic food webs.
L, Stone, R S, Weisburd
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Collaborative Filtering with Implicit Feedbacks by Discounting Positive Feedbacks

2016 IEEE Second International Conference on Multimedia Big Data (BigMM), 2016
Recommender Systems are indispensable to provide personalized services on the Web. Recommending items which match a user's preference has been researched for a long time, and there exist a lot of useful approaches. Especially, Collaborative Filtering, which gives recommendation based on users' feedbacks to items, is considered useful.
Kento Kawai, Hiroyuki Kitagawa
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Positive Feedbacks

2017
This chapter examines the main mechanisms leading to positive feedbacks, that is, self-reinforcement, such as imitative behavior and herding between investors. It shows that positive feedbacks contribute to the development of speculative bubbles, preparing the instability for a major crash. After providing an overview of feedbacks and self-organization
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Positive Feedback of Gonadotropins in Males

Andrologia, 2009
The influence of estradiol and progesterone upon serum LH and FSH has been evaluated in three groups of five normal adult males. These steroids were administered to ascertain whether the hypothalamus and pituitary in the male possesses the capability for acute release and positive feedback of gonadotropins, a well established characteristic of the ...
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Positive Position Feedback (PPF) Control

2013
This chapter presents the design of a positive position feedback (PPF) controller based on low-pass filters and band-pass filters. In Sect. 6.1, the principle of the PPF controller is presented based on the single degree of freedom (SDOF) case. In Sect.
Qibo Mao, Stanislaw Pietrzko
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