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M. Sheelagh


Publications by M. Sheelagh (bibliography)

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Scott, Stacey D., Sheelagh, M., Carpendale, T. and Inkpen, Kori (2004): Territoriality in collaborative tabletop workspaces. In: Proceedings of ACM CSCW04 Conference on Computer-Supported Cooperative Work 2004. pp. 294-303. http://doi.acm.org/10.1145/1031607.1031655

Researchers seeking alternatives to traditional desktop computers have begun exploring the potential collaborative benefits of digital tabletop displays. However, there are still many open issues related to the design of collaborative tabletop interfaces, such as whether these systems should automatically orient workspace items or enforce ownership of workspace content. Understanding the natural interaction practices that people use during tabletop collaboration with traditional media (e.g., pen and paper) can help to address these issues. Interfaces that are modeled on these practices will have the additional advantage of supporting the interaction skills people have developed over years of collaborating at traditional tables. To gain a deeper understanding of these interaction practices we conducted two observational studies of traditional tabletop collaboration in both casual and formal settings. Our results reveal that collaborators use three types of tabletop territories to help coordinate their interactions within the shared tabletop workspace: personal, group, and storage territories. Findings from a spatial analysis of collaborators' tabletop interactions reveal important properties of these tabletop territories. In order to provide a comprehensive picture of the role of tabletop territoriality in collaboration, we conclude with a synthesis of our findings and previous research findings and with several relevant design implications.

© All rights reserved Scott et al. and/or ACM Press

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Sheelagh, M., Carpendale, T., Cowperthwaite, David J. and Fracchia, F. David (1995): 3-Dimensional Pliable Surfaces: For the Effective Presentation of Visual Information. In: Robertson, George G. (ed.) Proceedings of the 8th annual ACM symposium on User interface and software technology November 15 - 17, 1995, Pittsburgh, Pennsylvania, United States. pp. 217-226. http://www.acm.org/pubs/articles/proceedings/uist/215585/p217-carpendale/p217-carpendale.pdf

A fundamental issue in user interface design is the effective use of available screen space, commonly referred to as the screen real estate problem. This paper presents a new distortion-based viewing tool for exploring large information spaces through the use of a three-dimensional pliable surface. Arbitrarily-shaped regions (foci) on the surface may be selected and pulled towards or pushed away from the viewer thereby increasing or decreasing the level of detail contained within each region. Furthermore, multiple foci are smoothly blended together such that there is no loss of context. The manipulation and blending of foci is accomplished using a fairly simple mathematical model based on gaussian curves. The significance of this approach is that it utilizes precognitive perceptual cues about the three-dimensional surface to make the distortions comprehensible, and allows the user to interactively control the location, shape, and extent of the distortion in very large graphs or maps.

© All rights reserved Sheelagh et al. and/or ACM Press

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