he mating type (MAT) locus on Saccharomyces cerevisiae chromosome III can recombine with the HMRa locus near the right telomere or the HML ␣ locus near the left telomere of the same chromosome. On page 361, Bressan et al. show that the current mating type of a cell determines the spatial configuration of these three loci in the nucleus, suggesting that the outcome of mating type switching is di...

In the study of eignefrequencies of robotic arms versus load, straightforward invariance property is singled out under a preload condition. We show that compliance does not affect this effect. This property opens the way to new robust and finite dimensional controllers. KEY WORDS—flexible arm, compliance, eigenfrequencies, infinite dimensional systems

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The probability that the cluster of the origin in critical site percolation on the triangular grid has diameter larger than R is proved to decay like R−5/48 as R→ ∞.

nonspecific activity-related arm pain is characterized by an absence of objective physical findings and symptoms that do not correspond with objective pathophysiology. arm pain without strict diagnosis is often related to activity, work-related activity in particular, and is often seen in patients with physically demanding work. psychological factors such as catastrophic thinking, symptoms of d...