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This paper develops additional advanced operations for transforming maximal planar graphs using the characteristics of both advanced moves due to Pesch et al. and-operation due to Al-Hakim. It shows that the new operations overcome some deficiencies of both the advanced moves and the-operations. The note urges researchers to develop more advanced operations. [ABSTRACT FROM AUTHOR]

Engineering design evaluation is characterized by imprecise (vague) importance and satisfaction levels of criteria, which are better treated as fuzzy variables rather than as subjective crisp variables. Nevertheless, operations on fuzzy numbers tend to increase unnecessarily the imprecision when they are combined for some applications, particularly, when a fuzzy-weighted average (FWA) is calculated. This paper proposes a novel method of operating on fuzzy numbers to obtain a fuzzy-weighted average of desirability levels during design evaluation. The method produces overall desirability levels less imprecise and more realistic than those of the conventional FWA. Furthermore, the balance points of these fuzzy numbers seem to be more credible than those of the FWA. An example is presented, which demonstrates the advantages of the method developed. [ABSTRACT FROM AUTHOR]

Many materials machine in either a ductile or brittle manner depending on the cutting conditions. This paper identifies the conditions which allow perspex to be machined in a ductile manner. A quantitative assessment is made of the effects of cutting speed and feed rate on the ductile-brittle transition when turning with a tool having a 30degrees rake angle. [ABSTRACT FROM AUTHOR]