Stability of Switched Feedback Time-Varying Dynamic Systems Based on the Properties of the Gap Metric for Operators

The stabilization of dynamic switched control systems is focused on and based on an operator-based formulation. It is assumed that the controlled object and the controller are described by sequences of closed operator pairs (L, C) on a Hilbert space H of the input and output spaces and it is related to the existence of the inverse of the resulting input-output operator being admissible and bounded. The technical mechanism addressed to get the results is the appropriate use of the fact that closed operators being sufficiently close to bounded operators, in terms of the gap metric, are also bounded. That philosophy is followed for the operators describing the input-output relations in switched feedback control systems so as to guarantee the closed-loop stabilization.

A view of the Assessment and Feedback Landscape: baseline analysis of policy and practice from the JISC Assessment and Feedback programme

Assessment and feedback lies at the heart of the learning experience, and forms a significant part of both academic and administrative workload. It remains however the single biggest source of student dissatisfaction with the higher education experience. The JISC Assessment and Feedback programme (Sept 2011-Aug 2014) is supporting large-scale changes in assessment and feedback practice, supported by technology, with the aim of enhancing the learning and teaching process and delivering efficiencies and quality improvements. This report summarises baseline reviews undertaken by a number of institutions as part of their programme activity.

Feedback on HE in FE bids

An analysis of the bids submitted to the HE in FE programme call for proposals as part of Circular 4/06. The call was for projects to implement and pilot e-learning technologies within one or more HE course delivered in one or more FE college.

Case study: Developing screen casting as a tool for formative and summative feedback

Case study on Oldham College and Edge Hill University working in partnership on a project to use screencasts as a way of providing feedback to learners.

Case study: Using audio feedback to improve engagement and performance

Case study on how tutors at Kingston College are using a free screencasting app called Jing to provide responsive audio feedback to students on their progress and performance.

EMA podcast: the assessment and feedback lifecycle

Podcast involving audio responses from three universities discussing the assessment and feedback lifecycle.