This paper describes a novel method for the visualization of hierarchically structured information. The Tree-Map visualization technique makes 100% use of the available display space, mapping the full hierarchy onto a...
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An experiment was performed to examine predictions from Clark's contribution theory of discourse. Pairs were asked to use a text-based synchronous messaging system to solve a problem involving the layout of a bank...
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The study explored touchscreen keyboards using high precision touchscreen strategies. Phase one evaluated three possible monitor positions: 30°, 45°, and 75° from horizontal. Results indicate that the 7...
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Hypertext systems are being used in many applications because of their flexible structure and the great browsing freedom they give to diverse communities of users. However, this same freedom and flexibility is the cau...
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'Augmentative communication' is a term used generally to refer to the use of speech synthesizers for spoken communication by people who cannot speak with their own voices. There are a number of conditions whic...
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'Augmentative communication' is a term used generally to refer to the use of speech synthesizers for spoken communication by people who cannot speak with their own voices. There are a number of conditions which can cause such loss of speech. Most of them are the result of physical damage to the voice-production mechanisms. Note that a distinction usually has to be drawn between impared speech and impaired language skills. Someone with a mental disability which affects their language ability will probably never be able to communicate, via speech (natural or synthetic) nor through other modes, such as sign language. So users of augmentative communication generally have physical disabilities rather than metal ones. However, physical disability is rarely specific. It is very common for an impairment which affects the speech apparatus to also affect other parts of the body-a fact which will be expanded on below. The author presents a very brief introduction to this use of synthetic speech. More details can be found in Edwards (1991), along with information regarding its use by blind computer users.< >
A method for visualizing hierarchically structured information is described. The tree-map visualization technique makes 100% use of the available display space, mapping the full hierarchy onto a rectangular region in ...
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ISBN:
(纸本)9780818622458
A method for visualizing hierarchically structured information is described. The tree-map visualization technique makes 100% use of the available display space, mapping the full hierarchy onto a rectangular region in a space-filling manner. This efficient use of space allows very large hierarchies to be displayed in their entirety and facilitates the presentation of semantic information. Tree-maps can depict both the structure and content of the hierarchy. However, the approach is best suited to hierarchies in which the content of the leaf nodes and the structure of the hierarchy are of primary importance, and the content information associated with internal nodes is largely derived from their children.< >
A closed-loop image segmentation system that incorporates a genetic algorithm to adapt the segmentation process to changes in image characteristics caused by variable environmental conditions is presented. The genetic...
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A closed-loop image segmentation system that incorporates a genetic algorithm to adapt the segmentation process to changes in image characteristics caused by variable environmental conditions is presented. The genetic algorithm efficiently searches the hyperspace of segmentation parameter combinations to determine the parameter set which maximizes the segmentation quality criteria. A summary of the experimental results that demonstrates the ability to perform adaptive image segmentation and to learn from experience using a collection of outdoor color imagery is given.< >
Database query is becoming a common task in public access systems; touchscreens can provide an appealing interface for such a system. This paper explores three interfaces for constructing queries on alphabetic field v...
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ISBN:
(纸本)0897913485
Database query is becoming a common task in public access systems; touchscreens can provide an appealing interface for such a system. This paper explores three interfaces for constructing queries on alphabetic field values with a touchscreen interface; including a QWERTY keyboard, an Alphabetic keyboard, and a Reduced Input Data Entry (RIDE) interface. The RIDE interface allows field values to be entered with fewer “keystrokes” (touches) than either keyboard while eliminating certain errors. In one test database, the RIDE interface required 69% fewer keystrokes than either keyboard interface.
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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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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