Stability of a Non Newtonian Fluid Between Two Concentric Rotating Porous Cylinders

The stability of non-Newtonian fluid confined between two concentric rotating porous cylinders has been examined. The critical determines the on set of instability has been determined as a function of 'a' (wave length) and S (cross viscous parameter). The variation of the critical Taylor number with S, suction parameter lambda and radial velocity distribution have been shown. It has been found that the effect of suction at the outer cylinder is to stabilize the flow whereas the injection destabilizes the flow. The presence of suction or injection does not affect radial velocity curves or vortex cells

The Stability of Non Newtonian Fluid Between the Two Rotating Porous Cylinders (Wide Gap Case)

This paper is primarily concerned with the stability of the non Newtonian fluid between two porous cylinders in the case of wide gap. The problem is discussed for Mhu>0,Mhu=0 and Mhu,0. The results show that the Taylor number depends on the gap size in the case of non Newtonian fluids and the presence of suction stabilizes the flow whereas the injection destabilizes the flow. Its is found the stability of the fluid decreases when the gap increases. The non Newtonian fluid is less stable when compared to the Newtonian fluid in the case of wide gap. It is also found in the case of wide gap(for non Newtonian fluid and the cylinders are counter rotating equally) the application of injection at the outer cylinder disturbs the radial velocity will not effect any appreciable change or disturbance in the vortex cell pattern at the onset of instability

Body Area Networks

Recent technological advances in integrated circuits, wireless networks, and physiological sensing have enabled miniature, lightweight, low power, intelligent monitoring devices to be integrated into a Body Area Network (BAN). This new type of technology hold much promise for future patient health monitoring. BANs promise inexpensive, unobtrusive, and unsupervised ambulatory monitoring during normal daily activities for long periods of time. However, in order for BANs to become ubiquitous and affordable, a number of challenging issues must be resolved, such as integration, standardisation, system design, customisation, security and privacy, and social issues. This paper presents an overview of many of these issues and indeed the background and rationale of body area networks

Bridging the gap by shaking superfluid matter

In cold compact stars, Cooper pairing between fermions in dense matter leads to the formation of a gap in their excitation spectrum and typically exponentially suppresses transport properties. However, we show here that weak Urca reactions become strongly enhanced and approach their ungapped level when the star undergoes density oscillations of sufficiently large amplitude. We study both the neutrino emissivity and the bulk viscosity due to direct Urca processes in hadronic, hyperonic and quark matter and discuss different superfluid and superconducting pairing patterns.Comment: 5 pages, 4 figure

Nutrition and feeding behavior of the southwestern corn borer Diatraea grandiosella Dyar (Lepidoptera : pyralidae)

Includes vita.The aim of the study was: 1) to determine the nutritional requirements of the southwestern com borer for proteins, carbohydrates, lipids, minerals and vitamins, 2) to measure the effects of carbohydrates and lipids on the feeding behavior of the first stage larva, 3) to distinguish positive or negative influences of nutrients on feeding behavior from those of lesions in absorption or metabolism so as to avoid incorrect decisions about growth responses, and 4) to study the inhibitive effects of hypocholesterolemic agents including 20, 25-diazacholesterol and triparanol on the sterol metabolism of the corn borer. The results indicated that the com borer has a specific dietary requirement for proteins, carbohydrates, sterols, polyunsaturated fatty acids, minerals, ascorbic acid and B-vitamins. The factors that are present in wheat germ oil which promoted larval growth and permitted normal wing development were determined. Beta-sitosterol acted as growth factor while methyl linoleate or linolenate served as wing development factor. The nutrients having a positive, neutral or negative influence on the maintenance of larval feeding were determined. The inhibiting effects of hypocholesterolemic agents on the sterol metabolism in the corn borer were determined.Includes bibliographical references