Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 284 for “"positive feedback"”.
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A synthetic positive feedback based gene regulatory circuit
… synthetic biology approach was used to develop a positive feedback base gene regulatory circuit in E.coli. Positive feedback is a common mechanism used in the regulation of many gene circuits as it can amplify the response to inducers and also generate binary outputs and hysteresis. In the context …
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Linear Power-Efficient RF Amplifier with Partial Positive Feedback
<p>Over the last decade, the number of mobile wireless devices on the market has increased substantially. New “multi-carrier” modulation schemes, such as OFDM, WCDMA, and WiMAX, have been developed to accommodate the increasing number of wireless subscribers and the demand for faster data rates …
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Hysteretic properties of a modular positive feedback-based gene amplifier
Positive feedback is a common mechanism in genetic circuits and can be used to achieve amplification, bistability, and hysteresis. Positive feedback mechanisms have been employed in numerous synthetic biology applications, including in the development of a modular positive feedback-based gene …
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Characterization of biotic and sodic lawns of the Kruger National Park using the framework of the positive feedback loop / Courtney Moxley
… of these communities is controlled by positive feedbacks between grazers and the high-quality resource forage that the component grass species provide. Different nutrient cycling dynamics among the lawns identifies two discrete lawn types in the savanna: bioticallydriven lawns on …
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The Effects of Feedback Sequence on Cognitive Performance
The current study tested the effects of feedback sequence on performance on a visual-spatial task. Twenty-three female participants were randomly assigned to one of five feedback sequence conditions which occurred after two consecutive trials of a hole-punch task. The five feedback sequence …
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Memory for performance feedback: a test of three self- motivation theories
… theories to predict recall of performance feedback, memory sensitivity, and ratings of perceived accuracy. Self-enhancement (Jones, 1973) predicts individuals are motivated to maintain their self-esteem. Individuals will therefore recall positive relative to negative feedback and will rate …
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Does A Sense Of Control Moderate Self-Regulation Strategies And Performance? When Feedback Lingers
… after discrediting randomly assigned negative or positive feedback. Performance tasks were designed to facilitate advancing (promotion) or vigilant (prevention) chronic self-regulatory strategies. Random feedback was given to students after completing the first set of anagrams and then discredited …
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Undestanding dishonest behavior: what motivates it, how to prevent it, and how people respond to it
… diminishes if the receiver is allowed to offer feedback to the senderWe investigate the effects of feedback on the decision to lie in a sender-receiver deception game with imperfect lie detection. We find evidence of feedback effects through two channels. First, the mere expectation of receiving …
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The relationship between coaching environment and athlete attributional style
… democratic, autocratic, social, and positive feedback) were calculated from the LSS. Significant differences were not found between countries for attribution dimensions (p > .05). Mean explanatory pessimism was 111.29 ±13.2 and 106.42 ± 10.7 for Ireland- and US-based athletes …
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Design and quantification of a tissue type specific genetic circuit in plants
… In addition, I engineered a circuit that adds a positive feedback motif. To quantify the behaviors of these circuits I developed a MATLAB program to remove background signals from confocal microscopy images and quantify GFP signal in a high-throughput manner. The genetic circuit is highly …
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Feedback Acceptance: a New Conceptualization and Consideration of Individual Difference Effects
… amount of research literature has focused on feedback acceptance, these studies yield mixed findings which may be a result of a vital element having been ignored. Existing research seems to point to individual differences as moderator variables in reactions to feedback and potential …
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Coaching Style Preferences of Division I College and Professional Softball Players
… and Instruction, Democratic Behavior, and Positive Feedback; players did not prefer Autocratic Behavior or Social Support. Follow-up univariate ANOVAs indicated that Autocratic Behavior was significantly different for Division I college softball players and professional softball players. …
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Feedback control design for closed-loop oscillations via dominant system theory
… in a controlled manner. While plenty of feedback control methods have been developed for equilibrium behaviors in control theory, we still lack a systematic design framework to excite non-oscillatory systems into oscillations via feedback control. As a step towards that, this thesis aims …
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Feedback between erosional morphology, sediment transport and abrasion in the transient adjustment of fluvial bedrock channels
… sediment transport. The experiments document a positive feedback in which bedload is preferentially transported in local topographic lows due to lateral transport and abrasion in turn deepens those topographic lows. Under sediment-starved conditions this positive feedback results in the incision …
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Paxillin is a Novel Regulator of Xenopus Oocyte Maturation
… fashion that involves an unusual positive feedback loop whereby MOS (a germ cell specific Raf) activates MEK1, which in turn activates ERK2. ERK2 then acts back on MOS to enhance its expression resulting in amplification of the kinase signaling cascade. To date, little is known …
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Noise and multistability in gene regulatory networks
… of expression of other proteins. Cells implement feedback loops to create a memory of their gene expression states. In this way, every differentiated cell in a multicellular organism remembers its expression profile throughout its life. On the other hand, biochemical reactions that take place …
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Bringing Identity To The Forefront: The Benefits Of Highlighting Identity And Diversity
… insights in an audit experiment exploring how feedback about either discriminatory or pro-diversity behaviors in one’s professional ingroup influences subsequent prejudice. Returning to the population of city councilors in Study 1, I first deliver PSAs with negative feedback (evidence that city …
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The effect of extrinsic reward on sport performance, perceived competence and intrinsic motivation
… they were performing in the top ten per cent. No feedback was given to either group on occasion 3. ANOVA revealed significant age and feedback condition main effects. A significant two-way interaction revealed superior occasion 2 and 3 performance and IM with positive feedback. LISREL indicated …
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A Theory of Nonlinear Negative Imaginary Systems
… used to establish the stability robustness of a positive feedback interconnection of negative imaginary systems in the linear case under a set of theoretical assumptions. Then, these assumptions will be adapted in the nonlinear setup to establish the stability robustness analysis of a positive …
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Cell Polarity Establishment in the Budding Yeast Saccharomyces Cerevisiae
… breaking. Symmetry breaking is thought to employ positive feedback to amplify stochastic fluctuations in protein concentration into a larger asymmetry. To test whether singularity could be guaranteed by the amplification mechanism we re-wired yeast to employ a synthetic positive feedback …
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