In this paper, the problem of stabilizing an open-loop unstable second-order system with time delay is considered. A constant feedback gain is utilized to stabilize the system. Using a modified version of Hermite-Biehler Theorem, which is applicable to quasi-polynomialsthe complete set of stabilizing constant feedback gains for open-loop unstable plants, is determined. The desired closed-loop p...

Cognitive control is an inherently multivariate phenomenon, and its neural basis is currently unclear. Here we examined using functional magnetic resonance imaging how participants retrieve prelearnt information from memory, use this information to guide responses for an impending decision, and adjust their responses based on outcome feedback. We developed a behavioral task designed to manipula...

We consider the problem of optimally allocating local feedback to the stages of a multistage amplifier. The local feedback gains affect many performance indexes for the overall amplifier, such as bandwidth, gain, rise time, delay, output signal swing, linearity, and noise performance, in a complicated and nonlinear fashion, making optimization of the feedback gains a challenging problem. In thi...

Cells regulate gene expression using networks of transcription interactions; it is of interest to discover the principles that govern the dynamical behavior of such networks. An important characteristic of these systems is the rise-time: the delay from the initiation of production until half maximal product concentration is reached. Here we employ synthetic gene circuits in Escherichia coli to ...

An analysis is provided to explain the sensitivity of regional climate to tropical deforestation based on an intermediate-level mechanistic model for land–atmosphere interaction. The analytical framework is made possible by the fact that feedback to local thermodynamics from large-scale dynamics is negligible, so the determining processes take place in situ. The analytical method accurately rep...

The rise of bilingual education triggers an important question: which language is preferred for a particular school activity? Our field experiment (n = 120) shows that students (aged 13-15) who process feedback in non-native English have greater self-serving bias than students who process feedback in their native Dutch. By contrast, literature on the foreign-language emotionality effect suggest...

Experimental data obtained on bilayer membranes treated with either of two antibiotics, monazomycin or alamethicin, are presented showing the marked difference in the time course of the rise and subsequent decay of the conductance in response to a positive and negative step of potential established by means of a voltage-clamp feedback circuit. The variation of the conductance with time in these...

since the emergence of the process-oriented approach to second language writing instruction two main questions have been what and how error feedback should be given to the students. the question of whether teachers should provide feedback on grammar in the writing assignments of english as a foreign language students, and if so how, has been a matter of considerable debate in the field of secon...

This study explores the impact of screencast feedback on maths tests for junior and high school students. While prior research emphasises influence learning, its effectiveness varies with type delivery. Although studies in higher education observe improved precision emotional connections through feedback, applicability secondary remains understudied. The authors surveyed 99 students, collecting...

It is a sobering fact that some 90% of papers that have been published in academic journals are never cited. Indeed, as many as 50% of papers are never read by anyone other than their authors, referees and journal editors. We know this thanks to citation analysis, a branch of information science in which researchers study the way articles in a scholarly field are accessed and referenced by othe...