The purpose of this study is to investigate the effects of asynchronous computer-mediated versus conventional corrective feedback on learners' writing accuracy. Three groups of learners took part in the study: asynchronous feedback group, conventional feedback group, and a control group. Asynchronous feedback group students received explicit feedback on the targeted structure via e-mail, while...

The significant role of needs analysis in enriching the design and content of ESP course books could be in no way ignored. The present study based on a three-year longitudinal needs analysis study of medical students, a medical ESP course book was developed and approved by experts. The feedback of the four-semester practice of the approved book revealed that practitioners showed great interest ...

The paper describes our participation in Monolingual tasks at CLEF 2007. We submitted results for the following languages: Hungarian, Bulgarian and Czech. We focused on studying different query expansion techniques: Probabilistic Relevance Feedback (PRF) and Mutual Information Relevance Feedback (MI-RF) to improve retrieval performance. After an analysis of our experiments and of the official r...

The stabilization of nonholonomic systems have focused a lot of attention this last years [see e.g. survey papers 1, 2], in particular because it fails to exist linearizing feedback transformation or static continuous stabilizing state feedback [3] despite they are open-loop controllable [4]. The two main strategies adopted to stabilize these systems are time-varying feedbacks [see e.g. 5, 6, 7...

An underexplored question, and one with potentially far-reaching implications for the practice of written corrective feedback (WCF), is whether to mark a wide range errors (comprehensive feedback) or focus on few error types (focused in learners’ L2 writing. Despite limited evidence, it argued that comprehensive WCF unsystematic, inconsistent, confusing, intimidating; can cognitively affectivel...

A compact device is introduced which enables users not only to operate computers by moving their hands in mid-air but also to feel haptic feedback on their hands. The device consists of a depth camera for hand tracking and a noncontact tactile display for haptic feedback. The tactile display utilizes focused ultrasound to produce tactile stimulation from a distance. The principles are described...

The paper deals with the internet based robotics. The attention is focused on the proposal and implementation of the experimental web based interface for the remote control of the mobile robot. The proposed system contains visual feedback to assistance the operator for safe navigation of the robot in dynamic environments. The control system utilizes the client server architecture and is mainly ...