Time-resolved two-dimensional imaging of ground-state species using laser-induced fluorescence" (1983). Laser-induced fluorescence has been employed to obtain two-dimensional images of the spatial distribution of a vapor in the ground state with nanosecond resolution. The method has a wide range of potential applications, as it can be used to observe any species which has energy levels accessib...

INTRODUCTION TO AIR BLAST MEASUREMENTS An explosion in air is a process by which a rapid release of energy generates a pressure wave of finite amplitude. The energy source can be anything that generates a violent reaction when initiated. This includes: chemical or nuclear materials, gases (high pressure gasstorage vessels, steam boilers), or electricity (spark gap, rapid vaporization of a metal...

Experimentation has been carried out to find the influence of a gap provided in ribs on thermohydraulic performance of a square duct roughened with discrete inclined ribs. The two opposite walls of the square duct are roughened with ribs having attack angle (α) of 45 and a gap on its length. The investigation has been performed for relative roughness pitch (p/e) of 10, relative roughness height...

In this paper we revisit the radio pulsar death line problem within the framework of curvature radiation and/or inverse compton scattering induced vacuum gap model above neutron star polar caps. Our special interest is in the recently detected pulsar PSR J2144−3933 with extremal period 8.5 seconds, which lies far beyond conventional death lines. We argue, that formation of vacuum gaps requires ...

microhole electrical discharge machining (EDM) system with daptive fuzzy logic control and precision piezoelectric stage is eveloped in this study. A high-speed EDM monitoring system is mplemented to measure the gap voltage, current, and ignition elay time, which are used to derive three input parameters—the verage gap voltage, deviation in spark ratio, and change in the eviation in spark ratio...