Holding Circular Saws While Sharpening

Noise Abatement for Circular Saws

Identification of critical speeds of clamped circular saws *

This paper presents a simple experimental methodology of determination of critical rotational speeds of circular saw blades. Both producers and users should be interested in getting information on the actual values of critical (permissible) speeds because very often rotational speeds recommended by producers (sometimes also marked on saw blades) are larger than the values obtained experimentally.

Cognitive-Motor Interference While Grasping, Lifting and Holding Objects

In daily life, object manipulation is usually performed concurrently to the execution of cognitive tasks. The aim of the present study was to determine which aspects of precision grip require cognitive resources using a motor-cognitive dual-task paradigm. Eighteen healthy participants took part in the experiment, which comprised two conditions. In the first condition, participants performed a m...

A set of surgical chain saws

A biochemical tour de force in this issue of The EMBO Journal suggests that JAMM/MPNþ -domain containing deubiquitinating enzymes specifically disassemble K63linked ubiquitin chains. A constantly changing environment requires cells to orchestrate the activities of signal transduction pathways with high temporal and spatial precision. A powerful tool to regulate signalling is the reversible modi...

Portfolio Sharpening

We explore the effective gain or loss in alpha from the point of view of the investor due to the volatility of a fund and its correlations to other asset classes. Fund managers and investors can be guided by this to increase the utility that is ultimately delivered to the investor. In this analysis of investor utility the Sharpe ratio is shown to be misleading and the tracking error has no role...