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Current climate control systems often rely on building regulation maximum occupancy numbers for maintaining proper temperatures. However, in many situations, there are rooms that are used infrequently, and may be heated or cooled needlessly. Having knowledge regarding occupancy and being able to accurately predict usage patterns may allow significant(More)
We present in this paper the essential aspects of the S2 system. This is the internet realization of SEMPER: An active, multi-domain, space-based, object oriented design environment for integrated building performance modeling. We begin with an overview of SEMPER principles. We then present the component based system architecture of S2, which makes use of(More)
As part of the World Business Council for Sustainable Development's (WBCSD) energy efficiency in building project, the authors have been involved in modelling various technology options for different building market segments to reach net-zero energy goal. This paper describes the modelling of single-family residence in US southeast as a case-in-point to(More)
Commerce transactions are being increasingly conducted in cyberspace. We not only browse through on-line catalogs of products, but also shop, bank, and hold auctions on-line. The general goal of this research is to answer questions such as: What electronic commerce protocols try to achieve? What they must achieve? And how they achieve it? My thesis in this(More)
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