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This paper describes a framework that serves as a reference for classifying user interfaces supporting multiple targets, or multiple contexts of use in the field of context-aware computing. In this framework, a context of use is decomposed into three facets: the end users of the interactive system, the hardware and software computing platform with which the(More)
This paper introduces the notion of plasticity, a new property of interactive systems that denotes a particular type of user interface adaptation. Plasticity is the capacity of a user interface to withstand variations of both the system physical characteristics and the environment while preserving usability. Typically, a 'plastic' electronic agenda would(More)
We propose the CARE properties as a simple way of characterising and assessing aspects of multimodal interaction: the Complementarity, Assignment, Redundancy, and Equivalence that may occur between the interaction techniques available in a multimodal user interface. We provide a formal definition of these properties and use the notion of compatibility to(More)
This article reports our reflection on software architecture modelling for multiuser systems (or groupware). First, we introduce the notion of software architecture and make explicit the design steps that most software designers in HCI tend to blend in a fuzzy way. Building on general concepts and practice from main stream software engineering, we then(More)
One of the new design goals in Human Computer Interaction is to extend the sensory-motor capabilities of computer systems to better match the natural communication means of human beings. This article proposes a dimension space that should help reasoning about current and future Multi-Sensori-Motor systems (MSM). To do so, we adopt a system centered(More)
Mobility coupled with the development of a wide variety of access devices has engendered new requirements for HCI such as the ability of user interfaces (UIs) to adapt to different contexts of use. We define a context of use as the set of values of variables that characterize the computational device(s) used for interacting with the system as well as the(More)
the widespread introduction of things and environments that see. However, reaping the benefits of ubiquitous perception will require consideration of human abilities and social needs as an integral part of system design. Research in human-computer interaction (HCI) has developed cognitive theories, design methods, and software tools for building useful and(More)
A number of architectural models, such as PAC, are available for the software design of interactive systems. These design abstractions, however, are not always clearly articulated nor do they explicitly exploit the foundational concepts developed recently in mainstream software architecture engineering. Similarly, technical solutions from mainstream(More)
Multimodal interaction enables the user to employ different modalities such as voice, gesture and typing for communicating with a computer. This paper presents an analysis of the integration of multiple communication modalities within an interactive system. To do so, a software engineering perspective is adopted. First, the notion of “multimodal(More)