3. S. E. Kayser and E. J. Majer, J. Geophys. Res., 83, 2533 (1978). 4. A. J. Dessler, J. Geophys. Res., 6-3, 507 (1958). 5~ D. G. Singleton, in: Spread F and Its Effects on Radiowave Propagation and Communication, W. and J. Mackey and Co., London and Chartman (1966), p. 553. 6. T. J. Elkins and M. D. Papagianis, J. Geophys. Res., 74, 4105 (1969). 7. V. Yu. Trakhtengerts and A. Ya. Fel'dshtein, ...

A sizable amount of research has been done to improve the mechanisms for knowledge extraction such as machine learning classification or regression. Quite unintuitively, the no free lunch (NFL) theorem states that all optimization problem strategies perform equally well when averaged over all possible problems. This fact seems to clash with the effort put forth toward better algorithms. This le...

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Abstract Since its inception, the "No Free Lunch" theorem (NFL) has concerned the application of symmetry results rather than the symmetries themselves. In our view, the conflation of result and application obscures the simplicity, generality, and power of the symmetries involved. This paper separates result from application, focusing on and clarifying the nature of underlying symmetries. The r...

Searching for small targets in large spaces is a common problem in the sciences. Because blind search is inadequate for such searches, it needs to be supplemented with additional information, thereby transforming a blind search into an assisted search. This additional information can be quantified and indicates that assisted searches themselves result from searching higher-level search spaces–b...

Are we over oxidized? A number of recent clinical trials with antioxidants, notably vitamin C and E, have provided no support for the commonly held view that increasing our intake of antioxidants will offset the ravages of cardiovascular disease as well as other diseases (for extensive critical reviews see: Kritharides and Stocker 2002; Antoniades et al 2003; Touyz 2004). Is this conclusion jus...

This study tests the recent claim that Broca's aphasics are impaired in automatic lexical access, including the retrieval of word meaning. Subjects are required to perform a lexical decision on visually presented prime target pairs. Half of the word targets are preceded by a related word, half by an unrelated word. Primes and targets are presented with a long stimulus-onset-asynchrony (SOA) of ...