Generalizations, Field Work, and Materialism

Stacked Generalizations: When Does It Work?

Stacked generalization is a general method of using a high-level model to combine lower-level models to achieve greater predictive accuracy. In this paper we address two crucial issues which have been considered to be a `black art' in classiication tasks ever since the introduction of stacked generalization in 1992 by Wolpert: the type of generalizer that is suitable to derive the higher-level ...

Materialism and food security.

The present studies examined if materialists have an elevated concern about food availability, presumably stemming from a general survival security motivation. Study 1 found that materialists set a greater life goal of food security, and reported more food insecurity during their childhood. Materialists reported less present-day food insecurity. Study 2 revealed that materialists stored/hoarded...

Materialism and modern medicine.

Ecology and Historical Materialism

Generalizations of Carmichaels in a field extension

The AKS conjecture states that (ζ − 1) ≡ ζ − 1 (mod n) for ζ an r-th root of unity with r prime, only if n is a prime and r n − 1. If n is a prime, n-th power map would be a Frobenius automorphism of Fn(ζ), and thus the congruence will hold true. In general, n-th power map is not a field automorphism, but under suitable conditions, it can be a group automorphism of the multiplicative group of c...