Australian opals & gemstones : natures own fireworks by Australian Gem Industry Association, Ltd

By Australian Gem Industry Association, Ltd

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3 The iTable, a bottom projected table used to experiment with table top UIs 42 B. Johanson et al. see dozens of students on a tiled wall-sized display and establish eye contact with any student, with telephone-quality audio and SD (Standard Definition) televisionquality video. 2 Overface In providing software for an open interactive environment, we faced a fundamental tradeoff in interaction design. On the one hand, we are committed to accepting the diversity of devices, operating systems, and legacy applications that people bring to the space.

2 Robust Flexible Infrastructure for Integration We have identified some key characteristics of practical Ubicomp environments that must be accounted for in any infrastructure designed to support such environments: Heterogeneity: A variety of different devices will be used in the workspace, chosen for their efficacy in accomplishing specific tasks. In addition to desktop workstations, these include laptops and PDAs with wireless connections used in conjunction with shared displays, as well as physical and tangible technologies specially designed for Ubicomp settings.

The problem behind this answer is the fact that AE live in open environments that constantly evolve; and that their nature of communication platforms obliges them to be compatible with distant participants, visitors, etc. who all live their own life, enter the space with their own devices, and protocols. We cannot oblige all these users to convert to the local protocols, and this drags the AE in the general flow of ICT evolution, with the obligation to keep up. 2 Activity-orientedness As devices and systems evolve on a continuous basis and the possible combinatory is endless, and never-ended, the stable target that orients design (and evaluation) is not specifications of the system, but rather understanding the goals of activity.

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