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One of the best-characterized physiological rhythms in plants is the circadian rhythm of CO(2) metabolism in Crassulacean acid metabolism (CAM) plants, which is the focus here. The central components of the plant circadian clock have been studied in detail only in Arabidopsis (Arabidopsis thaliana). Full-length cDNAs have been obtained encoding orthologs of(More)
Increasingly information systems and services are being tailored to the needs of individuals and groups through the use of user-centred design techniques. In this paper we consider the ways in which the users of digital cultural heritage have been previously characterised and grouped. Despite recog-nising the importance of adopting user-centred techniques,(More)