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RISStatus Report on Radar Meteor Wind and Density Measurements
Publisher: American Meteorological Society
Abstract: Equipment developments under the AFCRL radar meteor trail project are reviewed. Winds and densities in the 80?100 km altitude region obtained at AFCRL, Eglin AFB, Stanford, and Durham are briefly compared with results from ...
A SIXTEEN-MONTH SERIES OF MID-STRATOSPHERIC TEMPERATURE MEASUREMENTS
Publisher: American Meteorological Society
Abstract: This paper presents the results of a series of daily high-altitude balloon soundings made in New Jersey. Temperature data were obtained to about 40 km in quantity suitable for statistical study. Seasonal mean temperature ...
An Analysis of Particulate Removal from the TITAN Rocket Exhaust Cloud
Publisher: American Meteorological Society
Abstract: A simplified analytical model is developed to analyze the removal of A12O3 particles from the TITAN rocket exhaust cloud. The model incorporates the physical processes of deposition and impact collection and includes ...
An Improved Method for Obtaining the Water Content Values of Ice Hydrometeors from Aircraft and Radar Data
Publisher: American Meteorological Society
Abstract: Uncertainty analyses and operational experience at the Air Force Geophysics Laboratory (AFGL) have shown that for single samples of ice hydrometeors, the factor ? = M/(??), where M (spectral liquid water content) and Z ...
Observation and Quantification of Gas Bubble Formation on a Mechanical Heart Valve
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Clinical studies using transcranial Doppler ultrasonography in patients with mechanical heart valves (MHV) have detected gaseous emboli. The relationship of gaseous emboli release and cavitation ...
Wavelet Transforms in the Analysis of Mechanical Heart Valve Cavitation
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Cavitation is known to cause blood element damage and may introduce gaseous emboli into the cerebral circulation, increasing the patient’s risk of stroke. Discovering methods to reduce the ...
A New Method for Evaluation of Cavitation Near Mechanical Heart Valves
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Evaluation of cavitation in vivo is often based on recordings of high-pass filtered random high-frequency pressure fluctuations. We hypothesized that cavitation signal components are more appropriately ...
A Detailed Fluid Mechanics Study of Tilting Disk Mechanical Heart Valve Closure and the Implications to Blood Damage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Hemolysis and thrombosis are among the most detrimental effects associated with mechanical heart valves. The strength and structure of the flows generated by the closure of mechanical heart ...
Wall Shear-Rate Estimation Within the 50cc Penn State Artificial Heart Using Particle Image Velocimetry
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Particle image velocimetry (PIV) has been gaining acceptance as a routine tool to evaluate the flow fields associated with fluid mechanical devices. We have developed algorithms to investigate ...
Fluid Dynamic Analysis of the 50 cc Penn State Artificial Heart Under Physiological Operating Conditions Using Particle Image Velocimetry
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In order to bridge the gap of existing artificial heart technology to the diverse needs of the patient population, we have been investigating the viability of a scaled-down design of the ...