* A new technique of sensitivity analysis has been applied to the Kerber-Emanuel-Whittier model of a pulse mode hydrogen fluoride chemical laser, so as to determine which parameter uncertainties most critically influence the model's ability to predict laser performance. The particular parameters directly considered were thirteen rate constants out of a set of 68 rate constants in the model, and...

ear attaclhnment may be conniected to the receiver by means of rubber tubing, so that the physician can listen to heart-sounds in the familiar manner. 'I'he microphone,. which takes the form of a vibration pickup, is extremely unresponsive to extraneous souLIds, andl a rubber ring surrounding it reduces to a minimum noises which mav be caused bv handlinig the instrument. 'T'he frequency respons...

fiber with a cladding index of refraction larger than that f the core is an index antiguiding (IAG) fiber. In such a ber total internal reflection at the core–cladding interace does not take place. Light generated in the core of the ber can leak out into the cladding of an IAG fiber, though t experiences some guiding by grazing angle reflection. here is some loss on each reflection, but if ther...

A transient collisionally pumped X-ray laser (XRL) driven by the infrared pulses from the PHELIX laser preamplifier at GSI has successfully been put into operation. Strong lasing at 22 nm has been observed in nickel-like zirconium. Experimental data from the optimization of the XRL energy output support the conclusion that inverse Bremsstrahlung plays a key role in the pumping mechanism. Laser ...

Photolysls of caged calcium (Nitr!B, Calbiochem) can be used to study calcium dependent processes such as excitation-contraction coupling and muscular mechanics. Expensive high energy light sources are routinely used for UV light exposure, but this study describes an ahernatfve low cost xenon flash unit constrwted in our labor@tory. A 3W J short arc xenon flash lamp (Heimann) was mounted in an ...

This paper and corresponding seminar given on 20 September 2010 at the 16th International School for Quantum Electronics in Nesebar, Bulgaria, will describe the key hardware aspects of the Raman-shifted Eye-safe Aerosol Lidar (REAL) and recent advances in extracting two-component wind vector fields from the images it produces. The REAL is an eye-safe, ground-based, scanning, elastic aerosol bac...

We have studied calcium-activated potassium current, IK(Ca), and calcium-activated nonspecific cation current, INS(Ca), in Aplysia bursting pacemaker neurons, using photolysis of a calcium chelator (nitr-5 or nitr-7) to release "caged calcium" intracellularly. A computer model of nitr photolysis, multiple buffer equilibration, and active calcium extrusion was developed to predict volume-average...

Fabrication of sub-micron silicon integrated circuits (IC’s) requires ultra-shallow, high-dose ion implantation of dopant atoms, e.g., boron, followed by a rapid, high-temperature anneal. Since the implantation process damages the crystal lattice structure, the anneal is expected to repair this damage and react the implanted B atoms into Si lattice sites while minimizing inward diffusion of the...

Recent progresses in remote sensing of atmospheric pollution using the Lidar technique are presented. 2D and 3D analysis of NO, N02, S02, and 0 3 were performed at high sensitivity under emission and immission conditions. Most attractive results were obtained over large urban areas like Lyon, Stuttgart, Ziirich, Geneva and Berlin. New Lidar systems, based on selfdeveloped Flashlamp-pumped Ti:Sa...

The ability to capture the unsteady dynamics of high speed compressible flows requires the use of ultra fast imaging diagnostics. Application of particulate based scattering techniques in high speed flows requires the use of high power, nanosecond duration, pulsed illumination sources such as Nd:YAG lasers in order to record high quality images. Furthermore, the temporal bandwidth of the measur...