this paper concerns a study on the optimal control for nonlinear systems. an appropriate alternative in order to alleviate the nonlinearity of a system is the exact linearization approach. in this fashion, the nonlinear system has been linearized using input-output feedback linearization (iofl). then, by utilizing the well developed optimal control theory of linear systems, the compensated nonl...

This study investigated the effects of prompts as corrective feedback strategy on teaching /θ/ and /ð/ sounds to Iranian EFL learners. To achieve this objective, after 30 students studying English at a language institute took a placement test, the intermediate-level students were selected based on their scores on this test. They were randomly assigned to one experimental group and one control g...

The main role and responsibility of second language writing teachers is to help learners to write with minimal errors. To do so, teachers need to provide students with appropriate types of feedback. In this research, the researchers examined the effect of post-text written corrective feedback on written grammatical accuracy of Iranian intermediate EFL learners. In the first phase, Nelson Profic...

An enhanced displacement feedback structural control procedure is presented for performance-based design in this paper. At first, a comparative study is implemented assessing three most common active control algorithms including state, acceleration, and displacement feedback controls. The advantage of the displacement feedback algorithm for active control of structures against earthquakes is de...

The main role and responsibility of second language writing teachers is to help learners to write with minimal errors. To do so, teachers need to provide students with appropriate types of feedback. In this research, the researchers examined the effect of post-text written corrective feedback on written grammatical accuracy of Iranian intermediate EFL learners. In the first phase, Nelson Profic...

this study aimed at comparing the impact of two types of teacher feedback on iranian efl learners’ writing ability and their verb tense consistency in l2 writing. following the administration of a standardized language proficiency test (preliminary english test), sixty-two participants were selected and were randomly assigned to the control (direct-only correction) and experimental (direct meta...