Introduction ATM variable bit rate (VBR) service provides a statistical multiplexing gain and supports guaranteed quality of service through preventive congestion control techniques. However, to do this it requires the source to accurately predict its traffic parameters at call admission time. For stored video, this a priori estimation of traffic characteristics is straightforward; the traffic ...

As a tool for self-evaluation and also self-regulation, rubrics can be very useful in equipping the language teachers with an assessment device. Moreover, teachers need feedback for their professional development, but how feedback is provided is a challenging question. This study was an attempt to find the effectiveness of self-evaluation through rubrics on setting up group work activities by E...

This study used video feedback to improve the horseback-riding skills of advanced beginning riders. We focused on 3 skill sets: those used in jumping over obstacles, dressage riding on the flat, and jumping position riding on the flat. Baseline consisted of standard lesson procedures. Intervention consisted of video feedback in which a recorded attempt at the target behavior was immediately sho...

While existing research shows that reactive congestion control mechanisms are capable of providing high video quality and channel utilization for point-to-point real-time video, there has been relatively little study of the reactive congestion control of point-to-multipoint video, especially in ATM networks. Problems complicating the provision of multipoint, feedback-based real-time video servi...

While existing research shows that feedback-based congestion control mechanisms are capable of providing better video quality and higher link utilization for rate-adaptive packet video, there has been relatively little study on how to share network bandwidth among competing rate-adaptive video connections, when feedback control is used in a fully distributed network. This paper addresses this i...

INTRODUCTION Medical students at the Faculty of Medicine, University of Geneva, Switzerland, have the opportunity to practice clinical skills with simulated patients during formative sessions in preparation for clerkships. These sessions are given in two formats: 1) direct observation of an encounter followed by verbal feedback (direct feedback) and 2) subsequent review of the videotaped encoun...