objective: recently, a wide variation has been reported in delivery of the target torque by spring-style mechanical torque limiting devices (mtlds) but the effect of aging on their accuracy has not been independently evaluated. the purpose of this study was to determine the effect of aging on the accuracy of spring-style mtlds. methods: in this in-vitro experimental study, 15 new spring-style m...

Cranial ultrasound scans are very essential part of the routine investigation of neonatal intensive care. The scan ultrasound image sequence are not only used for real-time diagnosis but also recorded for future diagnosis, offline analysis of ultrasonogram images and the study of tissue velocity in neonatal cranium. Tissue motion in neonatal cranium is an important physical parameter in discuss...

We present a technique for measuring transient microscopic dynamics within deep tissue with sub-second temporal resolution, using diffusing-wave spectroscopy with gated single-photon avalanche photodiodes (APDs) combined with standard ungated multi-tau correlators. Using the temporal autocorrelation function of a reference signal allows to correct the temporal intensity autocorrelation function...

1. The rate of pulsation of the anterior contractile vacuole of Paramecium caudatum under chloretone anesthesia has been determined over a range of temperatures from 9-31 degrees C. It has been found that the rate is a logarithmic function of the temperature according to the Arrhenius equation. From 9-16 degrees the temperature characteristic (micro) has the value 25,600; from 16-22 degrees it ...

The period-luminosity relation of Miras and semiregular variables in the Large Magellanic Cloud and in the Galaxy is used to locate their instability domain in the Hertzsprung-Russell diagram. We take advantage of the considerable width in luminosity of the relation at given period to assign masses to the observed long-period variables using stellar models on the the asymptotic giant branch and...

The period-luminosity relation of Miras and semiregular variables in the Large Magellanic Cloud and in the Galaxy are used to locate their instability domain in the Hertzsprung-Russell diagram. We take advantage of the considerable width in luminosity of the relation at given period to assign masses to the observed long-period variables using stellar models on the the asymptotic giant branch an...