SUMMARY The Crocco-Lees method is applied to interactions between shocks and boundary layers that remain laminar throughout. The underlying assumptions of the method are critically reviewed, and the mathematical analysis imolved is presented. Results obtained by solving the resulting equations with the aid of the N.P.L. DEUCE computer are discussed. They are found to agree qualitatively with th...

Whether blood flow during cardiopulmonary resuscitation (CPR) results from intrathoracic pressure fluctuations or direct cardiac compression remains controversial. From modeling considerations, blood flow due to intrathoracic pressure fluctuations should be insensitive to compression rate over a wide range, but dependent on the applied force and compression duration. If direct compression of th...

We consider the optimal transmission of distributedcorrelated discrete memoryless sources across a network withcapacity constraints. We present several previously undiscussedstructural properties of the set of feasible rates and transmissionschemes. We extend previous results concerning the intersectionof polymatroids and contrapolymatroids to characterize whenall of the...

SUMMARY Time-resolved, 3D velocity-encoded MR imaging (4D Flow) allows for the acquisition of dynamic, multidirectional data on blood flow and has recently been used for the evaluation of intracranial arterial flow. Using a 3T system with optimization of both temporal resolution and k-space subsampling with a combination of parallel imaging and cut-corner acquisition, we present the clinical as...

In order to improve particle properties, new processes combining granulation and crystallization are being developed. This work deals with the spherical crystallization process by the quasi-emulsion mechanism applied to carbamazepine, a pharmaceutical drug. The aim of the present study was to produce of spherical grains made of mall crystals of a drug that have adequate properties for direct co...

In order to improve particle properties, new processes combining granulation and crystallization are being developed. This work deals with the spherical crystallization process by the quasi-emulsion mechanism applied to carbamazepine, a pharmaceutical drug. The aim of the present study was to produce of spherical grains made of mall crystals of a drug that have adequate properties for direct co...

BACKGROUND AND PURPOSE Compressing the internal jugular veins can reverse ventriculomegaly in the syndrome of inappropriately low pressure acute hydrocephalus, and it has been suggested that this works by "stiffening" the brain tissue. Jugular compression may also alter blood and CSF flow in other conditions. We aimed to understand the effect of jugular compression on brain tissue stiffness and...

In intact chronically instrumented dogs, left ventricular dynamics were studied during cardiopulmonary resuscitation (CPR). Electromagnetic flow probes measured cardiac output and coronary blood flow, ultrasonic transducers measured cardiac dimensions, and micromanometers measured left ventricular, right ventricular, aortic, and intrathoracic pressures. The dogs were anesthetized with morphine,...

using piezoelectric patches the stress concentration around a hole on a plate under tension is reduced and controlled. to attain the reduction in stress two placements for piezoelectric patches is investigated. the first location is top/bottom of the hole with compression induced strain and the second is left/right of the hole with tension induced strains to control the stress flow. the result ...