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J. P. Rushton and A. R. Jensen (2005) purport to show public-policy implications arising from their analysis of alleged genetic bases for group mean differences in IQ. This article argues that none of these implications in fact follow from any of the data they present. The risk in work such as this is that public-policy implications may come to be ideologically driven rather than data driven, a...

This paper describes a family of knowledge representation problems, whose intuitive solutions require reasoning about defaults, the effects of actions, and quantitative probabilities. We describe an extension of the probabilistic logic language P-log (Baral & Gelfond & Rushton 2004), which uses “consistency restoring rules” to tackle the problems described. We also report the results of a preli...

High-accuracy CFD results for laminar flow in a stirred tank agitated by three Rushton turbines are used as a starting point for an in-depth analysis of mixing. Asymptotic mixing performance is in®estigated as a function of the Reynolds number by means of Poincare sections, which re®eal large segregated regions with sizes and shapes that ®ary ́ greatly o®er a relati®ely small range of Reynolds n...

and male alopecia [1–4] . The prerequisite for delivering appropriate patient care is an understanding of the pathologic dynamics of hair loss and a potential multitude of causal relationships. Once the diagnosis is certain, treatment appropriate for that diagnosis is likely to control the problem. Ultimately, the best way to alleviate the emotional distress related to hair loss is to effective...

A current debate exists as to whether locomotion on foot is guided by optic flow (the apparent motion of the world when the subject is moving) [1–4] or perceived direction [5]. Rushton et al. [5] have shown that the path taken by a participant wearing prism spectacles is described reasonably by a model predicting trajectory from visual direction. We repeated Rushton et al.’s [5] experiment but ...

A current debate exists as to whether locomotion on foot is guided by optic flow (the apparent motion of the world when the subject is moving) [1–4] or perceived direction [5]. Rushton et al. [5] have shown that the path taken by a participant wearing prism spectacles is described reasonably by a model predicting trajectory from visual direction. We repeated Rushton et al.’s [5] experiment but ...

and male alopecia [1–4] . The prerequisite for delivering appropriate patient care is an understanding of the pathologic dynamics of hair loss and a potential multitude of causal relationships. Once the diagnosis is certain, treatment appropriate for that diagnosis is likely to control the problem. Ultimately, the best way to alleviate the emotional distress related to hair loss is to effective...