Number of co-authors:10
Number of publications with 3 favourite co-authors:Jock D. Mackinlay:4Polle T. Zellweger:3Takeo Igarashi:2
Bay-Wei Chang's 3 most productive colleagues in number of publications:Takeo Igarashi:66Jock D. Mackinlay:43Randall B. Smith:15
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 Bay-Wei Chang (bibliography)
Henzinger, Monika, Chang, Bay-Wei, Milch, Brian and Brin, Sergey (2003): Query-free news search. In: Proceedings of the 2003 International Conference on the World Wide Web 2003. pp. 1-10.
Many daily activities present information in the form of a stream of text, and often people can benefit from additional information on the topic discussed. TV broadcast news can be treated as one such stream of text; in this paper we discuss finding news articles on the web that are relevant to news currently being broadcast. We evaluated a variety of algorithms for this problem, looking at the impact of inverse document frequency, stemming, compounds, history, and query length on the relevance and coverage of news articles returned in real time during a broadcast. We also evaluated several postprocessing techniques for improving the precision, including reranking using additional terms, reranking by document similarity, and filtering on document similarity. For the best algorithm, 84%-91% of the articles found were relevant, with at least 64% of the articles being on the exact topic of the broadcast. In addition, a relevant article was found for at least 70% of the topics.
© All rights reserved Henzinger et al. and/or ACM Press
Zellweger, Polle T., Regli, Susan Harkness, Mackinlay, Jock D. and Chang, Bay-Wei (2000): The Impact of Fluid Documents on Reading and Browsing: An Observational Study. In: Turner, Thea, Szwillus, Gerd, Czerwinski, Mary, Peterno, Fabio and Pemberton, Steven (eds.) Proceedings of the ACM CHI 2000 Human Factors in Computing Systems Conference April 1-6, 2000, The Hague, The Netherlands. pp. 249-256.
Fluid Documents incorporate additional information into a page by adjusting typography using interactive animation. One application is to support hypertext browsing by providing glosses for link anchors. This paper describes an observational study of the impact of Fluid Documents on reading and browsing. The study involved six conditions that differ along several dimensions, including the degree of typographic adjustment and the distance glosses are placed from anchors. Six subjects read and answered questions about two hypertext corpora while being monitored by an eyetracker. The eyetracking data revealed no substantial differences in eye behavior between conditions. Gloss placement was significant: subjects required less time to use nearby glosses. Finally, the reaction to the conditions was highly varied, with several conditions receiving both a best and worst rating on the subjective questionnaires. These results suggest implications for the design of dynamic reading environments.
© All rights reserved Zellweger et al. and/or ACM Press
Chang, Bay-Wei, Mackinlay, Jock D., Zellweger, Polle T. and Igarashi, Takeo (1998): A Negotiation Architecture for Fluid Documents. In: Mynatt, Elizabeth D. and Jacob, Robert J. K. (eds.) Proceedings of the 11th annual ACM symposium on User interface software and technology November 01 - 04, 1998, San Francisco, California, United States. pp. 123-132.
The information presented in a document often consists of primary content as well as supporting material such as explanatory notes, detailed derivations, illustrations, and the like. We introduce a class of user interface techniques for fluid documents that supports the reader's shift to supporting material while maintaining the context of the primary material. Our approach initially minimizes the intrusion of supporting material by presenting it as a small visual cue near the annotated primary material. When the user expresses interest in the annotation, it expands smoothly to a readable size. At the same time, the primary material makes space for the expanded annotation. The expanded supporting material must be given space to occupy, and it must be made salient with respect to the surrounding primary material. These two aspects, space and salience, are subject to a negotiation between the primary and supporting material. This paper presents the components of our fluid document techniques and describes the negotiation architecture for ensuring that the presentations of both primary and supporting material are honored.
© All rights reserved Chang et al. and/or ACM Press
Zellweger, Polle T., Chang, Bay-Wei and Mackinlay, Jock D. (1998): Fluid Links for Informed and Incremental Link Transitions. In: Hypertext 98 - Proceedings of the Ninth ACM Conference on Hypertext and Hypermedia June 20-24, 1998, Pittsburgh, PA, USA. pp. 50-57.
We have developed a novel user interface technique for hypertext, called fluid links, that has several advantages over current methods. Fluid links provide additional information at a link source to support readers in choosing among links and understanding the structure of a hypertext. Fluid links present this information in a convenient location that does not obscure the content or layout of the source material. The technique uses perceptually-based animation to provide a natural and lightweight feeling to readers. In their richer forms, fluid links can provide a novel hypertext navigation paradigm that blurs the boundaries of hypertext nodes and can allow readers to fluidly control the focus on the material to support their current reading goals.
© All rights reserved Zellweger et al. and/or ACM Press
Igarashi, Takeo, Mackinlay, Jock D., Chang, Bay-Wei and Zellweger, Polle (1998): Fluid Visualization for Spreadsheet Structures. In: VL 1998 1998. pp. 118-125.
Chang, Bay-Wei, Ungar, David and Smith, Randall B. (1995): Getting Close to Objects: Object-Focused Programming Environments. In: Burnett, Margaret M., Goldberg, Adele and Lewis, Ted (eds.). "Visual Object-Oriented Programming: Concepts and Environments". Prentice Hallpp. 185-198
Chang, Bay-Wei and Ungar, David (1993): Animation: From Cartoons to the User Interface. In: Hudson, Scott E., Pausch, Randy, Zanden, Brad Vander and Foley, James D. (eds.) Proceedings of the 6th annual ACM symposium on User interface software and technology 1993, Atlanta, Georgia, United States. pp. 45-55.
User interfaces are often based on static presentations, a model ill suited for conveying change. Consequently, events on the screen frequently startle and confuse users. Cartoon animation, in contrast, is exceedingly successful at engaging its audience; even the most bizarre events are easily comprehended. The Self user interface has served as a testbed for the application of cartoon animation techniques as a means of making the interface easier to understand and more pleasant to use. Attention to timing and transient detail allows Self objects to move solidly. Use of cartoon-style motion blur allows Self objects to move quickly and still maintain their comprehensibility. Self objects arrive and depart smoothly, without sudden materializations and disappearances, and they rise to the front of overlapping objects smoothly through the use of dissolve. Anticipating motion with a small contrary motion and pacing the middle of transitions faster than the endpoints results in smoother and cleared movements. Despite the differences between user interfaces and cartoons -- cartoons are frivolous, passive entertainment and user interfaces are serious, interactive tools -- cartoon animation has much to lend to user interfaces to realize both affective and cognitive benefits.
© All rights reserved Chang and Ungar and/or ACM Press
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