We can make a difference in shaping the future by ensuring that computers "serve human needs (Mumford, 1934)." By making explicit the enduring values that we hold dear we can guide computer system designers ...
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IShell is a visual user interface for interaction using gestures under the UNIX operating system. A visual script language for building commands - IScript - is an integral part of the IShell environment The user can d...
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In this paper, we examine hypermedia systems with an emphasis on the types of learning they are appropriate for. We use Bloom's taxonomy of behavioral objectives as the organizing framework for a discussion of edu...
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For many interactive systems, and in particular designs influenced by the direct manipulation style of interaction, the user’s ability to have immediate visual and manipulative access to all data is limited by the ph...
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humancomputer interfaces which involve the use of multiple and redundant channels of communication will improve the quality and efficiency of interaction. In particular they will be easier to use for people with sens...
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humancomputer interfaces which involve the use of multiple and redundant channels of communication will improve the quality and efficiency of interaction. In particular they will be easier to use for people with sensory disabilities (or at least should be simpler to adapt). Such interfaces must be designed on a media-independent basis. The author discusses these assumptions and outlines a case study involving the Apple Macintosh graphical user interface.< >
Formal methods are widely proposed as an important part of the software design process, but the design of large systems imposes software engineering constraints on the refinement of these specifications into coded mod...
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The use of mathematical specification techniques is gaining momentum within industry and commerce. However much work still needs to be done to improve these techniques to make them more practically feasible. The autho...
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The use of mathematical specification techniques is gaining momentum within industry and commerce. However much work still needs to be done to improve these techniques to make them more practically feasible. The author concentrates on a particular problem-that the user's conceptual model of how a system works may conflict with the designer's understanding of how the user will view the system. There are two facets to the problem. First, mathematical specification is no way to communicate to the user how a system will look and feel. Second, mathematical models of interactive systems should incorporate claims, structures or principles about how the system will be used or understood. The author concentrates on the second facet by briefly discussing a database system. He shows how user-recognisable structures may be formulated and used in establishing criteria for designing and evaluating interactive systems, taking a software engineering approach.< >
A discussion is on a formal model of interactive systems: dynamic pointers. This model is useful, not only as a formal description tool, but also as a key to the informal understanding of certain issues and as an impl...
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A discussion is on a formal model of interactive systems: dynamic pointers. This model is useful, not only as a formal description tool, but also as a key to the informal understanding of certain issues and as an implementation technique. The focus of the article is on manipulation by which is meant 'doing things to things'. This is a rather wide definition, which at its simplest can be thought of as editing but at its richest encompasses virtually all interaction. The author goes on to discuss: modes of manipulation, mediated interaction, relating levels by translating pointers, changing objects with dynamic pointers and dynamic pointers for system integration.< >
High resolution touch screens and novel usage strategies have overcome earlier problems with parallax and inaccurate pointing. A study testing the utility of three touch screen strategies within the Hyperties hypertex...
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