Trends leading to the development of advanced tools powerful enough to allow realistic visualization of scientific and engineering phenomena are reviewed. Applications of the technology are described, stressing the im...
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Trends leading to the development of advanced tools powerful enough to allow realistic visualization of scientific and engineering phenomena are reviewed. Applications of the technology are described, stressing the importance of high-speed communication as a key factor for the development of useful visualization tools. Value-added processing at the nodes, networking, and software requirements are discussed.< >
the increasingly complex problem presented to educators by the variety of different and incompatible computersystems in schools is examined. the difficulty of finding acceptable educational softwarethat runs on all,...
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the increasingly complex problem presented to educators by the variety of different and incompatible computersystems in schools is examined. the difficulty of finding acceptable educational softwarethat runs on all, or even most of, the computersystemsthat a school may have and the rapid cycle of obsolescence of computersystems, which continues to compound the problem for users in schools, are discussed. Some credible and proven alternatives to current practices that could mitigate these problems are explored.< >
In the absence of an extensive and intensive causal science of learning, computer applications for education have most often been shaped by external factors. Programming for the manipulation of numbers came first, fol...
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In the absence of an extensive and intensive causal science of learning, computer applications for education have most often been shaped by external factors. Programming for the manipulation of numbers came first, followed by word processing and the manipulation of text. these are briefly discussed, and the potential of electronic mail and multimedia, which have not found much educational application as yet, is examined.< >
the existence of different computing platforms (such as workstations, minicomputers, mainframes, and supercomputers) has led to an increased interest in distributed computing systems. Significant increase in performan...
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the Supercomputer Toolkit, a proposed family of standard hardware and software components from which special-purpose machines can be easily configured, is introduced. Using the Toolkit, a scientist or an engineer, sta...
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the Supercomputer Toolkit, a proposed family of standard hardware and software components from which special-purpose machines can be easily configured, is introduced. Using the Toolkit, a scientist or an engineer, starting with a suitable computational problem, will be able to readily configure a special-purpose multiprocessor that attains supercomputer-class performance on that problem, at a fraction of the cost of a general purpose supercomputer. Some applications, the hardware, and the software are described.< >
the history of Aetna's Usability Laboratory, built in 1986 in response to the realization that usability of computers is an important business issue, is recounted. the laboratory's physical structure and its v...
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the history of Aetna's Usability Laboratory, built in 1986 in response to the realization that usability of computers is an important business issue, is recounted. the laboratory's physical structure and its value to the company are described. A number of conclusions Aetna has reached about how usability engineering is best accomplished in a corporate environment are discussed.< >
A weakness of EBL is its inability to explain when the theory is incomplete. this paper presents a three-step approach to deal with incomplete theories based on abduction, analogical reasoning and case-based reasoning...
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Some key aspects of CASE tool integration are explored using simple models. Data integration, control integration, and the interrelationship of control and data are examined. Examples are given of proposed standards a...
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Some key aspects of CASE tool integration are explored using simple models. Data integration, control integration, and the interrelationship of control and data are examined. Examples are given of proposed standards and commercially available products that illustrate different approaches to tool integration.< >
Distributed operating systems are often structured in a server-oriented way, with some system tasks being performed by server processes. An extended analysis of the servers' structure is provided along with its im...
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Distributed operating systems are often structured in a server-oriented way, with some system tasks being performed by server processes. An extended analysis of the servers' structure is provided along with its implications for the communication system. Small examples, which start from simple servers and become gradually more complex, illustrate the problems encountered when servers are written using a classical sequential process structure. Processes with several threads of control that execute the same code are used to overcome the problems encountered. the Hermix distributed operating system is used as an example to illustrate the use of such a process structure.< >
Two approaches, expressed in terms of mappings between design and computation, are explored withthe intention of clarifying the relationship between the theories of design and computation. First, the relationship bet...
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Two approaches, expressed in terms of mappings between design and computation, are explored withthe intention of clarifying the relationship between the theories of design and computation. First, the relationship between models of the design process and computational search strategies is explored. Second, relationships between design knowledge and computational representation schemes are discussed. Finally, some thoughts on integrating these design models and knowledge representation schemes into computersystemsthat assist designers are discussed.< >
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