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Mixed-presence tabletop interfaces aim to support collaboration between remote groups. However, it is unclear why tabletop interaction techniques should be important for mixed-presence or remote collaboration, and recent projects in this area differ as to which elements of tabletop interaction they choose to support. In this paper we discuss the benefits of(More)
We present an experimental comparison of multi-touch and tangible user interfaces for basic interface actions. Twelve participants completed manipulation and acquisition tasks on an interactive surface in each of three conditions: tangible user interface; multi-touch; and mouse and puck. We found that interface control objects in the tangible condition were(More)
There is growing interest in tabletop interfaces that enable remote collaboration by providing shared workspaces. This approach assumes that these remote tabletops afford the same beneficial work practices as co-located tabletop interfaces and traditional tables. This assumption has not been tested in practice. We explore two such work practices in remote(More)
Co-located collaborative Web browsing is a relatively common task and yet is poorly supported by conventional tools. Prior research in this area has focused on adapting conventional browsing interfaces to add collaboration support. We propose an alternative approach, drawing on ideas from tabletop interfaces. We present WebSurface, a novel tabletop(More)
Multi-person tabletop applications that require a high display resolution, such as collaborative web-browsing, are currently very difficult to create. Tabletop systems that support mixed-presence collaboration, where some collaborators are remote, are also hard to build. As a consequence, investigation of some important tabletop applications has been rather(More)
Previous research has shown that orientation and territory serve key roles during tabletop collaboration. However, no one has yet investigated whether they can play similar roles in distributed collaboration. In this paper, we design and implement distributed tabletops to address this problem and hence improve distributed collaboration. We show that(More)
Remote collaboration technologies frequently provide a shared visual workspace of the task at hand, but often lack support for the visual cues and work practices of co-located collaboration. This is particularly acute in design tasks, in which the shared workspace is the focus of collaboration. Lately there has been growing interest in remote tabletop(More)
Displaying small text on large multiprojector tiled displays is challenging. Problems arise because text is badly affected by the image-warping techniques that these displays apply to rectify projector misalignment. As a consequence , there has been little progress with important large-display applications that require small text, such as collab-orative(More)
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