the bulk of research within the interactionist framework seems to be consensually pointing to the beneficial effects of interaction in sla. however, few studies have investigated the role of training in providing and perceiving interactional feedback, especially among young learners. this study probed the effects of training prior to engagement in interaction in case of young learners acquiring...

this study is a typological description of written formative feedback in an efl context in iran. twenty m.a. students of tefl participated in the study. they were required to summarize a scholarly article in each session on which the instructor would provide written corrective feedback (cf). written formative comments were extracted, coded, and categorized into various types, such as asking for...

This paper deals with sampled-data control of nonlinear systems in the output feedback form. A sampled-data control strategy is proposed based on the existing control design in the continuous-time domain via output feedback. The proposed control uses the sampled output and a discrete-time implementation of filters involved. The overall stability of the system under the proposed control has been...

This study considers the implications of corporate political activity and political risk on asset pricing. It is found that firms which operate an affiliated political action committee (PAC) outperform firms that do not. Among firms that operate a PAC, we find that those that spend relatively less on politics outperform those that spend more and that political risk is successfully hedged by fir...

Word learning is a complex activity whose mechanisms are not fully understood. For instance, there is an ongoing debate whether feedback is fundamental to learning the meaning of words. Three experiments and a simulation aimed to investigate the importance and role of feedback in learning a six-word vocabulary of an artificial language. In the experiments, participants had to guess what object ...

A global robust output feedback dynamic compensator is proposed for stabilization and tracking of a class of systems that are globally di eomorphic into systems which are in generalized output-feedback canonical form. This form includes as special cases the standard outputfeedback canonical form and various other forms considered previously in the literature. Output-dependent nonlinearities are...

The problem of closed-loop control of maneuvers between two states for linear dynamical systems, subject to an arbitrarily specified terminal state, is considered. The feedback controller design is based on finite-time quadratic regulator theory. Closed-form expressions for the optimal control law are developed. Solutions are presented for both conventional and smoothed control profiles with fi...

This paper presents a tracking algorithm for the adaptive control of nonlinear dynamic systems represented in Strict Feedback Form with parametric uncertainty. The construction of the stabilizing algorithm is given using Passivity-based arguments that result in an Adaptive Passivity-Based Controller (APBC). This paper also shows a comparison with a controller designed via Adaptive Backstepping ...

Cellular networks are composed of complicated interconnections among components, and some subnetworks of particular functioning are often identified as network motifs. Among such network motifs, feedback loops are thought to play important dynamical roles. Intriguingly, such feedback loops are very often found as a coupled structure in cellular circuits. Therefore, we integrated all the scatter...