This paper presents the development of a lightweight component model that allows user to manage the introduction and arrangement of new interactive services and devices in the home. The model is responsive to ethnographic studies of the interplay between the Space-plan or interior layout and Stuff or artefacts placed within the fabric of the home. Interaction techniques developed through user-participation enable household members -rather than designers -to configure and reconfigure interactive devices and services to meet local needs. As a result, we have developed a tabletbased editor that discovers available ubiquitous components and presents these to users as 'jigsaw pieces' that can be dynamically assembled and recombined.
This paper describes how home appliances might be enhanced to improve user awareness of energy usage. Households wish to lead comfortable and manageable lives. Balancing this reasonable desire with the environmental and political goal of reducing electricity usage is a challenge that we claim is best met through the design of interfaces that allows users better control of their usage and unobtrusively informs them of the actions of their peers. A set of design principles along these lines is formulated in this paper. We have built a fully functional prototype home appliance with a socially aware interface to signal the aggregate usage of the user's peer group according to these principles, and present the prototype in the paper.
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