Genetically programmed recombination plays an important role in differentiation, antigenic variation, and evolution in many systems. Mating-type switching is an example of programmed recombination, and studies of both the budding yeast [1] and fission yeast [2] have provided a wealth of knowledge on how epigenetic and genetic machineries interact with each other to control this process. Fission...

We study the complexity problem in artificial feedforward neural networks designed to approximate real valued functions of several real variables; i.e., we estimate the number of neurons in a network required to ensure a given degree of approximation to every function in a given function class. We indicate how to construct networks with the indicated number of neurons evaluating standard activa...

APRIL 2005 • VOLUME 9, NUMBER 2 • CLINICAL JOURNAL OF ONCOLOGY NURSING This is the second in a series of articles to help nurses use and understand statistics. The purpose of the series is to assist nurses in critically reviewing published studies and implementing the fi ndings of research into clinical practice. The fi rst article addressed basic statistical considerations and types of variabl...

Collapse: how societies choose to fail or succeed/Jared Diamond. p. cm. Includes index.

We introduce and discuss shape based models for finding the best interpolation data when reconstructing missing regions in images by means of solving the Laplace equation. The shape analysis is done in the framework of Γ-convergence, from two different points of view. First, we propose a continuous PDE model and get pointwise information on the ”importance” of each pixel by a topological asympt...