Number of co-authors:17
Number of publications with 3 favourite co-authors:Paul Dourish:4Ramana Rao:3W. Keith Edwards:3
John Lamping's 3 most productive colleagues in number of publications:Tom Rodden:105Paul Dourish:92W. Keith Edwards:62
Knowledge is commonly socially constructed, through collaborative efforts towards shared objectives or by dialogues and challenges brought about by different persons' perspectives.
-- G. Salomon (in "Distributed Cognitions: Psychological and Educational Considerations")
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Publications by John Lamping (bibliography)
Dourish, Paul, Edwards, W. Keith, Howell, Jon, LaMarca, Anthony, Lamping, John, Petersen, Karin, Salisbury, Michael, Terry, Doug and Thornton, Jim (2000): A Programming Model for Active Documents. In: Ackerman, Mark S. and Edwards, Keith (eds.) Proceedings of the 13th annual ACM symposium on User interface software and technology November 06 - 08, 2000, San Diego, California, United States. pp. 41-50.
Dourish, Paul, Edwards, W. Keith, LaMarca, Anthony, Lamping, John, Petersen, Karin, Salisbury, Michael, Terry, Douglas B. and Thornton, James D. (2000): Extending document management systems with user-specific active properties. In ACM Transactions on Information Systems, 18 (2) pp. 140-170.
Document properties are a compelling infrastructure on which to develop document management applications. A property-based approach avoids many of the problems of traditional hierarchical storage mechanisms, reflects document organizations meaningful to user tasks, provides a means to integrate the perspectives of multiple individuals and groups, and does this all within a uniform interaction framework. Document properties can reflect not only categorizations of documents and document use, but also expressions of desired system activity, such as sharing criteria, replication management, and versioning. Augmenting property-based document management systems with active properties that carry executable code enables the provision of document-based services on a property infrastructure. The combination of document properties as a uniform mechanism for document management, and active properties as a way of delivering document services, represents a new paradigm for document management infrastructures. The Placeless Documents system is an experimental prototype developed to explore this new paradigm. It is based on the seamless integration of user-specific, active properties. We present the fundamental design approach, explore the challenges and opportunities it presents, and show our architectures deals with them.
© All rights reserved Dourish et al. and/or ACM Press
LaMarca, Anthony, Edwards, W. Keith, Dourish, Paul, Lamping, John, Smith, Ian and Thornton, Jim (1999): Taking the work out of workflow: Mechanisms for document-centered collaboration. In: Bødker, Susanne, Kyng, Morten and Schmidt, Kjeld (eds.) ECSCW 99 - Proceedings of the Sixth European Conference on Computer Supported Cooperative Work 12-16 September, 1999, Copenhagen, Denmark. p. 1.
Dourish, Paul, Lamping, John and Rodden, Tom (1999): Building Bridges: Customisation and Mutual Intelligibility in Shared Category Management. In: Proceedings of the International ACM SIGGROUP Conference on Supporting Group Work 1999 November 14-17, 1999, Phoenix, Arizona, USA. pp. 11-20.
Research into collaborative document use often concentrates on how people share document content. However, studies of real-world document practices reveal that the structures by which document corpora are organised may also, themselves, be important sites of collaborative activity. Unfortunately, this poses a problem. When category structures are used to understand a set of documents, the manipulation of those structures can interfere with shared understanding and intelligibility of the document space. We show how this problem arises in real-world settings, using a case arising from some recent field work. We outline a solution to the customisation/intelligibility problem, and show how it has been implemented in a system for personal and workgroup document management.
© All rights reserved Dourish et al. and/or ACM Press
Lamping, John and Rao, Ramana (1996): The Hyperbolic Browser: A Focus + Context Technique for Visualizing Large Hierarchies. In J. Vis. Lang. Comput., 7 (1) pp. 33-55.
Lamping, John, Rao, Ramana and Pirolli, Peter (1995): A Focus+Context Technique Based on Hyperbolic Geometry for Visualizing Large Hierarchies. In: Katz, Irvin R., Mack, Robert L., Marks, Linn, Rosson, Mary Beth and Nielsen, Jakob (eds.) Proceedings of the ACM CHI 95 Human Factors in Computing Systems Conference May 7-11, 1995, Denver, Colorado. pp. 401-408.
We present a new focus+context (fisheye) technique for visualizing and manipulating large hierarchies. Our technique assigns more display space to a portion of the hierarchy while still embedding it in the context of the entire hierarchy. The essence of this scheme is to lay out the hierarchy in a uniform way on a hyperbolic plane and map this plane onto a circular display region. This supports a smooth blending between focus and context, as well as continuous redirection of the focus. We have developed effective procedures for manipulating the focus using pointer clicks as well as interactive dragging, and for smoothly animating transitions across such manipulation. A laboratory experiment comparing the hyperbolic browser with a conventional hierarchy browser was conducted.
© All rights reserved Lamping et al. and/or ACM Press
Nichols, David A., Curtis, Pavel, Dixon, Michael and Lamping, John (1995): High-Latency, Low-Bandwidth Windowing in the Jupiter Collaboration System. 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. 111-120.
Jupiter is a multi-user, multimedia virtual world intended to support long-term remote collaboration. In particular, it supports shared documents, shared tools, and, optionally, live audio/video communication. Users who program can, with only moderate effort, create new kinds of shared tools using a high-level windowing toolkit; the toolkit provides transparent support for fully-shared widgets by default. This paper describes the low-level communications facilities used by the implementation of the toolkit to enable that support. The state of the Jupiter virtual world, including application code written by users, is stored and (for code) executed in a central server shared by all of the users. This architecture, along with our desire to support multiple client platforms and high-latency networks, led us to a design in which the server and clients communicate in terms of high-level widgets and user events. As in other groupware toolkits, we need a concurrency-control algorithm to maintain common values for all instances of the shared widgets. Our algorithm is derived from a fully distributed, optimistic algorithm developed by Ellis and Gibbs . Jupiter's centralized architecture allows us to substantially simplify their algorithm. This combination of a centralized architecture and optimistic concurrency control gives us both easy serializability of concurrent update streams and fast response to user actions. The algorithm relies on operation transformations to fix up conflicting messages. The best transformations are not always obvious, though, and several conflicting concerns are involved in choosing them. We present our experience with choosing transformations for our widget set, which includes a text editor, a graphical drawing widget, and a number of simpler widgets such as buttons and sliders.
© All rights reserved Nichols et al. and/or ACM Press
Lamping, John and Rao, Ramana (1994): Laying Out and Visualizing Large Trees Using a Hyperbolic Space. In: Szekely, Pedro (ed.) Proceedings of the 7th annual ACM symposium on User interface software and technology November 02 - 04, 1994, Marina del Rey, California, United States. pp. 13-14.
We present a new focus+context (fisheye) scheme for visualizing and manipulating large hierarchies. The essence of our approach is to lay out the hierarchy uniformly on the hyperbolic plane and map this plane onto a circular display region. The projection onto the disk provides a natural mechanism for assigning more space to a pardon of the hierarchy while still embedding it in a much larger context. Change of focus is accomplished by translating the structure on the hyperbolic plane, which allows a smooth transition without compromising the presentation of the context.
© All rights reserved Lamping and Rao and/or ACM Press
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