Positional, tangential, and orthogonality constraints are all linear and can be easily incorporated into freeform curve and surface editing and manipulation environment. In this paper, we show that the area and volume constraints that are traditionally considered non linear and hence diicult to handle, can indeed be reformulated as linear constraints and similarly incorporated with ease into ed...

We report here on recent developments in the characterization of molecular branching, molecular cyclicity, molecular shape, and chirality using graph theoretical invariants.

In the conceptual design phase, designers not only require an easy way to construct a freeform surface, but also need to modify it intuitively. In this paper, a feature based freeform surface design method is proposed in order to fit the requirement. First, a freeform feature library is introduced as the basis of the system. Freeform features in the library can either be extracted from existing...

We present evidence that attributes that are known to the file system when a file is created, such as its name, permission mode, and owner, are often strongly related to future properties of the file such as its ultimate size, lifespan, and access pattern. More importantly, we show that we can exploit these relationships to automatically generate predictive models for these properties, and that...

Similar to research on risky choice, the traditional analysis of intertemporal choice takes the view that an individual behaves so as to maximize the discounted sum of all future utilities. The well-known Allais paradox contradicts the fundamental postulates of maximizing the expected value or utility of a risky option. We describe a violation of the law of diminishing marginal utility as well ...

Predictions of diametral errors in turning often assume that these errors are solely due to bending of the workpiece and tool. However, recent studies indicate that this cannot explain observed diametral errors in short workpieces. This paper presents an empirical study of the effect of cutting parameters and workpiece materia l on diametral errors. Steel and aluminum samples were machined at d...

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