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69 M ost of us have created Web content using only human-friendly information. Of course, this makes sense—after all, humans are the intended users of the information. However, with the continuing explosion of Web content—especially multimedia content—we argue that contents should be created in a more machine-friendly format—one that lets machines better(More)
The goal of our research is to support cooperative work performed by stakeholders sitting around a table. To support such cooperation, various table-based systems with a shared electronic display on the tabletop have been developed. These systems, however, suffer the common problem of not recognizing shared information such as text and images equally(More)
Browsing Web pages, which plays an important part of our daily creative knowledge work, often includes purposefully revisiting pages we have browsed before. Many of the existing tools and approaches for revisitation clearly distinguish the use of history from Web browsing. The approach presented in this paper blurs the distinction between browsing the Web(More)
SUMMARY In this paper, we present t-Room, the next generation video communication system we are developing. Our approach is to build rooms with identical layouts, including walls of display panels on which users and physical or virtual objects are all shown at life-size. In this way, the user space enclosed by t-Room's surrounding displays can be shared as(More)
In this study, we examine how remote collaborators' upper body view affects collaboration when people engage in multiparty fluid tabletop activities across distances. We experimentally investigated the effects of upper body view on four-person group tabletop collaboration, two-by-two at identical locations: shared tabletop vs. shared tabletop plus upper(More)
Software designers make design decisions covering a wide variety of aspects of the software to be designed through a nested intertwined process. Some of these dependencies among design decisions may not be obvious, though, especially for those who did not go through the design process. Extending or altering an existing design decision without fully(More)
When we generate writings and drawings in creative knowledge work, such as in producing a company report, writing a paper, making presentation slides, or in developing programs, we often go back to what we have previously authored. This paper presents our history-centric approach to support such types of authoring. The approach first saves all editing(More)