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In this paper we present a new method for auraliza-tion of the vorticity of a streamline in a vectorj?eld. This technique involves using a composite tone formed by superimposing sine waves of various amplitudes whosefiequency and amplitude vary in such a way as to give the perception that the resulting sound increases or decreases endlessly in pitch without(More)
Mday finding that they are able to successfully use computers, especially personal and home computers, thanks to an abundance of well-designed "canned" software. Those who wish to progress beyond the canned software stage, however, discover that programming is painstaking work. Worse yet, learning to program is, for many, even more forbidding ; indeed, the(More)
We present UnWindows VI, a set of tools designed to assist low vision users of X Windows in effectively accomplishing two mundane yet critical interaction tasks: selectively magnifying areas of the screen so that the contents can be seen comfortably, and keeping track of the location of the mouse pointer. We describe our software from both the end user's(More)
The potential utility of dividing the information flowing from computer to human among several sensory modalities is investigated by means of a rigorous experiment which compares the effectiveness of auditory and visual cues in the performance of a visual search task. The results indicate that a complex auditory cue can be used to replace cues traditionally(More)
The ACM Computing Classification System (CCS), which for 20 years has served as the primary and most generally used system for the classification and indexing of the published literature of computing, has been substantially revised to reflect the greatly changed nature of computing. In this article, the revision committee reports on its work, describes the(More)