Kwok Chieu Chow

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A transformational approach is presented that models a virtual reality scene based on Abstract Interaction Objects (AIOs) from which virtual user interfaces can be designed (by progressive AIO assembling), generated (by automated code generation in VRML/X3D), and evaluated (by static analysis of the ongoing model). The underlying model is shared with user(More)
AIChE shall not be responsible for statements or opinions contained in papers or printed in its publications. ABSTRACT The paper describes an approach to dynamic multivariate analysis in which principal component analysis (PCA) is combined with integral transform techniques. The aim was to detect correlations when process dynamics cause lags or time delays.(More)
The strongly conserved single tryptophan residue, Trp92, in Bacillus subtilis tryptophanyl-tRNA synthetase has been mutagenized via site direction singly into Gln, Ala, and Phe. All three mutant enzymes were inactive toward the catalysis of tRNA tryptophanylation. The Trp92----Phe mutant has been subcloned into the high expression plasmid pKK223-3 to yield(More)
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