This study investigates the feasibility of application ultrasonic measurement to characterize Steel-Fiber-Reinforced Concrete (SFRC). Specifically, effects steel fiber content, age, moisture and orientation on Ultrasonic-Pulse-Velocity (UPV) were investigated. In this regard, beam cylindrical samples fabricated with different contents. The result indicated that for specimens UPV increases addit...

an important issue in power generation and petrochemical industries is the monitoring of pipe wall thickness and corrosion/erosion rate. the pipes are usually subject to erosive and/or corrosive environments and any failure could be catastrophic. while periodic manual ultrasonic thickness measurement is the common practice in many industries, in certain cases, where higher accuracies are requir...

INTRODUCTION Serial monitoring of patients participating in clinical trials of carotid artery therapy requires noninvasive precision methods that are inexpensive, safe and widely available. Noninvasive ultrasonic duplex Doppler velocimetry provides a precision method that can be used for recruitment qualification, pre-treatment classification and post treatment surveillance for remodeling and r...

Ultrasonic compression wave propagation is sensitive to the physical state of particulate liquid suspensions – colloids and emulsions. It is possible to estimate dispersed particle size distribution (PSD) from measurements of wave attenuation and/or phase velocity as functions of frequency. It is also possible to detect and characterise dynamic phenomena such as flocculation, network formation ...

The acoustical parameters of some synthesized azomethines have been studied from ultrasonic velocity and density measurement at different concentration in methanol and dimethyl formamide at 303.15 K. The apparent adiabatic molar compressibilities and apparent molar volume were also evaluated. The results provide useful information about solute-solute and solute-solvent interactions and are of s...

Non-contact air-coupled technique has been applied to measure ultrasonic velocities in two planar samples, Plexiglas and mortar. Longitudinal waves and mode-converted shear velocities were obtained by three approaches. The obtained velocities were compared with that measured by contact method. The results demonstrate that non-contact air-coupled technique has great potential for the comparative...

In this article, we review use and clinical utility of the Ultrasonic Cardiac Output Monitor, manufactured in Australia, which was first introduced clinically in 2001. It is non-invasive, requires only a low cost and allows for bedside examination, all of which make this tool potentially useful for patients in emergency departments and intensive care units. Its uses include triage, differential...

This thesis focuses on the possibility of using ultrasonic measurement techniques for energy gas characterization. The idea is to combine both on-line flow measurements with non-invasive fluid characterization in the same measurement setup using the same sensor(s). The long-term goal of the project is to develop measurement methods based on ultrasonic techniques that can measure; the flow rate,...