The entropy of a dynamical system S' on a hyperbolic attractor with respect to the Bowen-Ruelle-Sina) measure is obtained as a limit of entropy characteristics of small random perturbations x' of S'. Both the case of perturbations only in some neighborhood of an attractor and global perturbations of a flow with hyperbolic attracting sets are considered.

The Drosophila seven in absentia (sina) gene is required for R7 photoreceptor cell formation during Drosophila eye development, where it functions within the Ras/Raf pathway and targets other proteins for degradation via associations with a ubiquitin-conjugating enzyme. Recently, a mammalian sina homologue was reported to be a p53-inducible gene in a myeloid leukemia cell line. To explore the f...

Recension av: Hoitotyön muistot. Red. Helga Tahvanainen & Juha Nirkko. Helsinki 2000 (SKS). 384 s., ill.

"Ibn Sina (Arabic), also known as Avicenna (Latin) and Abu Ali Sina (Persian) was the most original and systematic Muslim philosopher. In this light he is mentioned by two celebrated historians of medieval western philosophy: A. Maurer states, "...his [ibn Sina's] philosophy is a highly personal achievement, ranking among the greatest in the history of philosophy;" and F. Copleston holds, "The ...