Robust model matching control of input/output switched asynchronous sequential machines is addressed in this paper. The control objective is to determine the existence condition and design algorithm for a corrective controller that can match the stable-state behavior of the closed-loop system to that of a reference model, while invalidating any transient faults that cause unauthorized state tra...

oral corrective feedback, according to many researchers’ points of view, plays a crucial role in facilitating and accelerating the process of the second language learning. the present study aims to identify persian learners’ error types, the teachers’ feedback types and learners’ uptakes; also it is aimed at determining the most and least frequent errors occurred on the basis of lyster and rant...

L2 written corrective feedback has been investigated from different perspectives in SLA research (e.g. Ahmadian & Tajabadi, 2015; Bitchener & Knoch, 2010; Ferris, 2006). Taking the cognitive and sociocultural paradigms into account, the aims of the current study are twofold: Firstly, it attempts to find if corrective feedback is effective in improving the linguistic accuracy of L2 learners' ten...