Philip D. Gray

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Haptic devices are now commercially available and thus touch has become a potentially realistic solution to a variety of interaction design challenges. We report on an investigation of the use of touch as a way of reducing visual overload in the conventional desktop. In a two-phase study, we investigated the use of the PHANToM haptic device as a means of(More)
We present a way of analyzing sensed context information formulated to help in the generation, documentation and assessment of the designs of context-aware applications. Starting with a model of sensed context that accounts for the particular characteristics of sensing, we develop a method for expressing requirements for sensed context information in terms(More)
Model-based user interface development environments show promise for improving the productivity of user interface developers, and possibly for improving the quality of developed interfaces. However, model-based techniques have rarely been applied to the important area of database interfaces. This lack of experience with data intensive systems may have led(More)
While haptic feedback has been shown to enhance user performance and satisfaction in single target interactions in desktop user interfaces, it is not clear whether this will hold for more realistic, multi-target interactions. Here we present an experimental study of haptically enhanced menus. We evaluate a visual condition, a haptic condition and an(More)
In this paper we present a notation, ASUR++, for describing mobile systems that combine physical and digital entities. The notation ASUR++ builds upon our previous one, called ASUR. The new features of ASUR++ are dedicated to handling the mobility of users and enable a designer to express physical relationships among entities involved in the system. The(More)
Although landmarks are an integral part of navigation, they have rarely been used explicitly within electronic pedestrian navigation aids. We describe a two-part study into the use of landmarks in such aids, using a set of field experiments. The first part investigated whether such devices can be effective for older adults (over 60 years old), who might(More)
There are many sources of change within the domain of home care. People have changing needs, beliefs, and preferences regarding their care plan and how they might want to interact with existing and emerging home care technologies. The devices and services available to the user are likely to change over time depending on a person's capabilities or location(More)