Previous work has reported numerical and experimental results pertaining micro-scale laser shock processing, which imparts compressive residual stresses in metallic targets with higher spatial resolution. In this paper, the more detailed physical process of laser-liquid-solid interaction is considered to achieve more accurate simulation results of shock pressure and to provide values for coeffi...

Blind synchronization constitutes a major challenge in realizing highly efficient ultra wide band (UWB) systems because of the short pulse duration which requires a fast synchronization algorithm to accomodate several asynchronous users. In this paper, we present a new Code Block Synchronization Algorithm (CBSA) based on a particular code design for a non coherent transmission. Synchronization ...

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Solar bursts with superfine time structure observed at 2.5 and 2.85GHz at the Crimean Astrophysical Observatory have been analyzed by means of statistical methods for nonlinear dynamical systems. Finite values of the correlation dimension have not been detected for all the studied events. The presence of a 1/f component in many of the processed events has been found by means of wavelet analysis...

High order Raman generation has received considerable attention as a possible method for generating ultrashort pulses. A large number of Raman orders can be generated when the Raman-active medium is pumped by two laser pulses that have a frequency separation equal to the Raman transition frequency. High order Raman generation has been studied in the different temporal regimes, namely: adiabatic...

We study hydrogenlike target excitation by a traveling electromagnetic pulse. The spatial size of the pulse l5ct (c is the speed of light and t is the pulse duration! is assumed to be comparable or less than the characteristic size of the initially occupied atomic state. When propagating through the atom, the pulse is shown to transform the electron wave function ‘‘slice by slice.’’ These trans...

Pollutant emissions from diesel engines are significantly affected by fuel injection strategies that could reduce NOx and Soot emissions. For the first time and in this study, numerical simulations were performed to consider the influences of changing the injection duration in each pulse of the double injection strategies on in-cylinder parameters and pollutant emissions. Results confirmed that...

Detection thresholds for biphasic symmetric pulses were measured in fourteen human subjects implanted with the Cochlear Corporation Nucleus 22 Implant. The effects of phase duration on thresholds were studied using single pulses, and 500 ms pulse trains at 100 pps. Psychophysical detection thresholds decreased as a function of phase duration with a change in slope at approximately 0.5 ms/phase....

A CMOS circuit for low voltage Pulse Duration Modulation (PDM) is proposed. This circuit is intended for portable low voltage VLSI system-on-a-chip applications like Hearing aids. The chip operates on a 3V supply and has a power consumption of 0.7mW. The chip occupies an are a of 0.0375mm on a 0.6υm standard CMOS technology. The triangle wave generation is carried out using micro power CMOS com...