Open Source Interface Politics: Identity, Acceptance, Trust, and Lobbying

A study of the Drupal open source project shows the rather problematic status of usability designers with respect to the larger developer community. Issues of power, trust, and identity arise and affect the way that usability recommendations are acted on or ignored. A political view of these aspects can help in interpreting the situation. We found that making a straightforward case for a particular interface design can be insufficient to convince developers. Instead various additional lobbying strategies may be employed to build up a quorum of support for the designunpublishe

Iterative learning control — Monotonicity and optimization

The area if Iterative Learning Control (ILC) has great potential for applications to systems with a naturally repetitive action where the transfer of data from repetition (trial or iteration) can lead to substantial improvements in tracking performance. There are several serious issues arising from the "2D" structure of ILC and a number of new problems requiring new ways of thinking and design. This paper introduces some of these issues from the point of view of the research group at Sheffield University and concentrates on linear systems and the potential for the use of optimization methods and switching strategies to achieve effective control