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In situ X-ray diffraction studies of structural evolution of colloidal crystal films formed by polystyrene spherical particles upon incremental heating are reported. The Bragg peak parameters, such as peak position, integrated intensity, and radial and azimuthal widths were analyzed as a function of temperature. A quantitative study of colloidal crystal… (More)
Defect reduction in GaN regrown on hexagonal mask structure by facet assisted lateral overgrowth " , Effects of miscut of prestructured sapphire substrates and MOVPE growth conditions on (11 ¯ 22) oriented GaN " , J. Blue to true green LEDs with semipolar quantum wells based on GaN nanostripes " , Phys.cal-cavity surface-emitting lasers with birefringence… (More)
The future of solid-state lighting can be potentially driven by applications of InGaN/GaN core-shell nanowires. These heterostructures provide the possibility for fine-tuning of functional properties by controlling a strain state between mismatched layers. We present a nondestructive study of a single 400 nm-thick InGaN/GaN core-shell nanowire using… (More)
We have performed experiments using magnetocumulative generators (MCGs) to power three different types of high-energy-density plasma discharges suitable for intense x-ray generation. They include the H-pressed discharge, the capillary z-pinch, and the θ-pinch. The MCGs were operated with, and without, plasma opening switches. The characteristic currents… (More)
The length, height and width of the ethmoidal labyrinth have been measured in children from birth up to 16 years of age (125 osseous total preparations). Coefficients of the regressive equations have been estimated (the sixth degree polynomial) in order to calculate the prognosticated dimentions. The data obtained can be used in surgery.