Browsing by Author "Sharp, Maurice"
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- ItemOpen AccessPRINCIPLES FOR SITUATED ACTIONS IN DESIGNING VIRTUAL REALITIES(1992-05-01) Sharp, MauriceThis thesis presents a theoretical framework for designing virtual realities. Virtual reality systems use new technologies such as stereoscopic headmounted displays, instrumented gloves and six-degree of freedom trackers to increase the bandwidth of communication between the user and computer. They allow the user to interact directly with a three-dimensional, computer simulated world. The user is immersed in virtual reality. It is argued that the sense of immersion is due to the users' situatedness in the virtual reality. Thus a theory of designing virtual realities needs to incorporate the notion of situatedness, from the theory of situated actions. Principles are derived by examining ethnomethodology, the theory behind situated actions. The principles are then used to interpret previous guidelines for virtual reality design. The interpreted guidelines subsume those in the literature. A field study is then used to exemplify the use of the principles and guidelines in a practical situation.
- ItemOpen AccessPrinciples for situated actions in designing virtual realities(1992) Sharp, Maurice; Gaines, Brian R.
- ItemOpen AccessR-LINDA: IMPLEMENTING LINDA IN RPC(1989-09-01) Sharp, MauriceR-Linda is an implementation of the Linda parallel processing paradigm. It is implemented using the Apollo Computer NCS remote procedure call (RPC) package. This paper describes the implementation and the implications of using RPC for the project. It also suggests some improvements to the RPC paradigm. Performance measurements are given in an appendix.
- ItemOpen AccessA SUMMARY OF THE PRESENTATIONS FROM THE FIRST CONFERENCE ON CYBERSPACE(1990-06-01) Sharp, MauriceTake fourteen people of varying specialities and ask them to talk about aspects of a common interest. The result is the first conference on cyberspace. Cyberspace does not exist yet in any palpable form. We have seen some glimmerings of what is possible by using equipment varying from a Commodore 64 to the VPL DataGlove. But this is just the tip of the iceberg. What is needed is some framework for future development in, and research on, cyberspace. For this reason, the conference focused on directions and ideas, not implementations. The presenters and attendees covered a broad spectrum of disciplines comprising architecture, art, computer science, engineering, philosophy, political science, psychology, sociology and writing (authors). Also the academic, corporate, and industrial worlds were well represented. Such a mix of disciplines led to a diversity of ideas. However, as the presentations and discussions progressed, some definite themes became clear. This paper attempts to integrate the ideas presented at the conference, gives a partial definition of cyberspace, and indicates directions for future research and discussion. The paper starts with a general discussion of the nature of cyberspace. This background is used to discuss cyberspace from three different views: interface, information and communication. Next, some theoretical foundations of cyberspace are discussed. Then possible approaches to implementation including architectures and paradigms are outlined. Next the effect on humans individually and in general is covered. After that is a discussion of the issues raised and some areas of conflict. Then some possible areas of research are covered. And finally a partial definition of cyberspace is given.