Some Experiments in Breeding Slugs

Some experiments in number theory

Following footsteps of Gauss, Euler, Riemann, Hurwitz, Smith, Hardy, Littlewood, Hedlund, Khinchin and Chebyshev, we visit some topics in elementary number theory. For matrices defined by Gaussian primes we observe a circular spectral law for the eigenvalues. We experiment then with various Goldbach conjectures for Gaussian primes, Eisenstein primes, Hurwitz primes or Octavian primes. These con...

Field Experiments in Prey Selection by Resident Bald Eagles in the Breeding and Non-breeding Season

--A field experiment, offering a choice of two prey fish of unequal sizes to foraging Bald Eagles (Haliaeetus leucocephalus), was devised. The objective of the field experiment was to determine if eagles preferred one prey item over another, and if this preference varied between breeding and non-breeding seasons. A total of 67 trials were conducted on four nesting pairs of eagles, 32 trials in ...

Frankenstein Classiiers: Some Experiments

We present some empirical results on the use of two methods for integrating diierent classiiers into a hybrid classiier that should perform better than each of its constituent classiiers. The main point of these methods is that instead of combining full classiiers, they combine pieces of them. One of the methods is based on ROC analysis; the other is based on augmenting the data with features d...

Some Experiments with Undeenedness

We distinguish two kinds of undeenedness: undeenedness in existence versus undeenedness in information. We give several applications of the rst kind: a rst order formulation of the untyped lambda calculus and a Zermelo-Fraenkel style theory for partial functions which is equally powerful as ZF-Set Theory. We add the rst kind of unde-nedness to a typed lambda calculus, and show that identifying ...

Animal Experiments in Medicine Animal houses, breeding of experimental animals