Abstract. This paper defines the problem space of distributed, migratable and plastic user interfaces, and presents CAMELEON-RT 1 , a technical answer to the problem. CAMELEON-RT 1 is an architecture reference model that can be used for comparing and reasoning about existing tools as well as for developing future run time infrastructures for distributed, migratable, and plastic user interfaces. We have developed an early implementation of a run time infrastructure based on the precepts of CAMELEON-RT 1 .
Abstract. This paper addresses software adaptation to context of use. It goes one step further than our early work on plasticity [5]. Here, we propose a revision of the notion of software plasticity that we apply at the widget level in terms of comets. Plasticity is defined as the ability of an interactive system to withstand variations of context of use while preserving quality in use where quality in use refers to the ISO definition. Plasticity is not limited to the UI components of an interactive system, nor to a single platform: adaptation to context of use may also impact the functional core, it may have an effect on the nature of the connectors, and it may draw upon the existence of multiple platforms in the vicinity to migrate all or portions of the interactive system. A new reference framework that structures the development process of plastic interactive systems is presented to cover these issues. The framework is then applied at the granularity of widgets to provide the notion of a comet. A comet is an introspective widget that is able to self-adapt to some context of use, or that can be adapted by a tier-component to the context of use, or that can be dynamically discarded (versus recruited) when it is unable (versus able) to cover the current context of use. To do so, a comet publishes the quality in use it guarantees, the user tasks and the domain concepts that it is able to support, as well as the extent to which it supports adaptation.
Abstract. Ubiquitous computing has introduced the need for interactive systems to run on multiple platforms in different physical environments. Providing a user interface specially crafted for each context of use () is costly, may result in inconsistent behaviors [5] and above all is limited to the contexts of use that have been envisioned at design time. Opportunistic interaction in a changing environment requires enabling approaches and techniques for gracefully adapting the interactive system to its context of use. In Human-Computer Interaction, this ability of an interactive system to withstand variations of context of use while preserving its quality in use is called plasticity [7]. This paper shows how Model Driven Engineering is suited for supporting plasticity both at design time and run time.
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