Oblique Reflection of Shock Waves in a Slow Sound Speed Fluorocarbon Liquid

Oblique Reflection of Shock Waves in a Slow Sound Speed Fluorocarbon Liquid Tuesday, June 13, 1995 4:00 p.m. Bruce J. P. Mortimer School of Electrical Engineering Cape Technikon Cape Town, South Africa Fluorocarbon liquids have very low sound speed. In addition, because the equation of state of these fluids is highly nonlinear, the nonlinearity param­eter…

Comparison of Binomial, ZAM and Minimum Cross-Entropy Time- Frequency Distributions of Intracardiac Heart Sounds

Friday, May 5, 1995 4:00 p.m. James Bulgrin Brooke Army Medical Center, Fort Sam Houston, TX and Hughes Aircraft Corp., Fullerton, CA During the past thirty years there have been few advances in the devel­opment of automated heart sound analysis. The slow advancement is in part due to the inability of conventional spectral analysis techniques…

Nonlinear Elastic Behavior of Granular Porous Media

Nonlinear Elastic Behavior of Granular Porous Media Friday, April 28, 1995 4:00 p.m. Dr. Mukul Sharma Department of Petroleum Engineering University of Texas at Austin For most rocks, the elastic moduli obtained from ultrasonic measurements, well logs and static stress cycling measurements indicate that Εultrasonic > Εlog >> Εstatic. Stress-strain diagrams demonstrate that the sampled…

Shallow-Water Time Series Simulation Using in Range-Dependent Environments Normal-Mode Theory

Friday, January 27, 1995 4:00 p.m. Geoffrey S. Royal Applied Research Labs University of Texas at Austin A broadband coupled-mode model analysis of acoustic propagation in a shallow-water wedge-shaped environment is presented. Simulated time se­ries from a coupled mode model calculation are compared to measured time series taken during a tank experiment conducted by Tindle…

Normal Mode Modeling of Acoustic Propagation in a Multi-Layered Acousto-Elastic Ocean Environment

Friday, January 20, 1995 4:00 p.m. Dr. Evan K. Westwood Applied Research Labs University of Texas at Austin A normal mode model has been developed for underwater acoustic propa­gation in an ocean having a multi-layered elastic bottom. Following a brief tutorial on normal mode theory and the effects of shear waves, a description of the…

Presentations for the 128th Meeting of the Acoustical Society of America, Part 3

Wednesday, November 23, 1994 3:30 p.m. Wonkyu Moon “Thermodynamic property considerations for modeling piezoelectric ceramic vibrators including thermal effects” Wonkyu Moon “Bond graph model for one-dimensional heat conduction for modeling of piezoelectric ceramic vibrators including thermal effects” Oleg Rudenko “Analytical method for describing the paraxial region of finite amplitude sound beams” Vera Khokhlova “Modification of…

Presentations for the 128th Meeting of the Acoustical Society of America, Part 2

Monday, November 21, 1994 3:30 p.m. Mike Bailey “Bioeffects of positive and negative pulses in vivo” Robin Cleveland “Sonic Boom Risetime” Mark Hamilton “Transient axial solution for the reflection of a spherical wave from a paraboloidal mirror” Larry Gelin “Experimental study of reflection of airborn, spark-produced N waves by a paraboloidal dish” Tom Kite “The…