We consider the classical problem of the stick-slip dynamics observed when peeling a roller adhesive tape at a constant velocity. From fast imaging recordings, we extract the dependence of the stick and slip phase durations on the imposed peeling velocity and peeled ribbon length. Predictions of Maugis and Barquins [in Adhesion 12, edited by K. W. Allen, Elsevier ASP, London, 1988, pp. 205-222]...

When some granular material contained into a silo is pushed upwards with a piston, an irregular stick-slip motion of the system of grains is observed. We show how one can adapt the 'Scalar Arching Model' (sam) – proposed as a model for giant stress fluctuations in silos – in order to describe this stick-slip phenomenon. As a function of the sensitivity of the system to mechanical noise, the sys...

Neonatal pain response and adverse effects and maternal anxiety were assessed in 27 infants who were randomly allocated to venepuncture or heel stick. Pain was assessed by nurses using the Neonatal Infant Pain Scale (NIPS) and a three point scale for the mothers. NIPS scores were higher in the heel stick group compared with the venepuncture group. Maternal anxiety was higher before the procedur...

different methods for detecting broken bars in induction motors can be found in literature. many of these methods are based on evaluating special frequency magnitudes in machine signals spectrums. current, power, flux, etc are among these signals. frequencies related to broken rotor fault depend on slip. in industrial environment due to some phenomena - such as load oscillation, other faults an...

BACKGROUND Accidental exposure to blood and body fluids is frequent among health care workers. They are at high risk of nosocomial transmission of blood borne pathogens due to injuries caused by used sharps. We are reporting impact of surveillance and educational program on the rate of needle stick injuries among health care workers at a tertiary care hospital in Pakistan. METHODS At Aga Khan...

In this paper we present different Monte Carlo algorithms to obtain inverse matrix. Here, we first determine two algorithms and describe their restrictions to be applicable for computing the inversion of a nonsingular matrix. Then, we establish an efficient algorithm to obtain approximate inversion of an arbitrary nonsingular matrix. This algorithm obtain an accurate inversion when the other tw...

Several schemes under the framework of Dual RSA have been proposed by Sun et al (IEEE-IT, August 2007). We here concentrate on the Dual CRT-RSA scheme and present certain range of parameters for which this is insecure. As a corollary of our work, we prove that the Dual Generalized Rebalanced-RSA (Scheme III of Sun et al) can be efficiently broken for a significant region where the scheme has be...

36 We performed electrophysiological and behavioral experiments in single leg preparations 37 and intact animals of the stick insect Carausius morosus to understand mechanisms 38 underlying the control of walking speed. 39 At the level of the single leg, we found no significant correlation between stepping velocity 40 and spike frequency of motor neurons other than the previously shown modifica...

OBJECTIVE To ascertain knowledge, attitude and practices of medical students regarding needle stick injuries. METHODS A cross sectional survey was conducted among the consenting medical students of 3rd, 4th and 5th years at a teaching hospital of Karachi, Pakistan. Convenience sampling was used. Pre-tested questionnaires were administered to approximately 70% of each class. Data was analyzed ...