Second Generation Shock Tube Calibration System

Impulse Generation by an Open Shock Tube

Weperformexperimental andnumerical studies of a shock tubewith an open end.The purpose is to investigate the impulse due to the exhaust of gases through the open end of the tube as amodel for a partially filled detonation tube as used in pulse detonation engine testing.We study the effects of the pressure ratio (varied from3 to 9.2) and the volume ratio (expressed as fill fractions) between the...

Shock-Tube Calibration of a Fast-Response Pressure Transducer

second generation of hiv surveillance system: a pattern for iran

Towards a shock tube method for the dynamic calibration of pressure sensors.

In theory, shock tubes provide a pressure change with a very fast rise time and calculable amplitude. This pressure step could provide the basis for the calibration of pressure transducers used in highly dynamic applications. However, conventional metal shock tubes can be expensive, unwieldy and difficult to modify. We describe the development of a 1.4 MPa (maximum pressure) shock tube made fro...

A second generation computer forensic analysis system

The architecture of existing – first generation – computer forensic tools, including the widely used EnCase and FTK products, is rapidly becoming outdated. Tools are not keeping pace with increased complexity and data volumes of modern investigations. This paper discuses the limitations of first generation computer forensic tools. Several metrics for measuring the efficacy and performance of co...