Signal optimization is affected during radio links between a transmitter and a receiver located in adjacent material media with differing optical densities. The optimization is carried out via the automated control theory method. The radio signal obtained after the optimization is coordinated with the two media's electrical characteristics simultaneously; and this enables low power and small an...

In this paper, the production of Al2O3-Mo nano-composites via mechanical milling was investigated. Molybdenum and alumina powders with certain ratios were grounded in a planetary ball mill at different times. XRD technique was used to determine the crystallite size of the milled powders. The microstructure of milled powders was studied using optical and electron microscopes. The crystallite siz...

in this study, the effects of oxygen supplementation in different stocking densities of rainbow trout (oncorhynchus mykiss) on the specific growth rates (sgr), feed conversion ratios (fcr) and survival rates were investigated in a commercial-scale culture system. high density cultures were maintained in a total of nine (12 m3) flow-through systems supplemented with o2. initial stocking rates fo...

ABSTRACT We present a spectrum of the planetary nebula (PN) M 2-36 obtained using Ultraviolet and Visual Echelle Spectrograph (UVES) at Very Large Telescope. 446 emission lines are detected. perform an analysis chemical composition multiple electron temperature (Te) density (ne) diagnostics. Te ne computed variety methods, including collisionally excited line (CEL) ratios, O++ optical recombina...

We present observational evidences that dust in the circumnuclear region of AGNs has different properties than in the Galactic diffuse interstellar medium. By comparing the reddening of optical and infrared broad lines and the X-ray absorbing column density we find that the EB−V/NH ratio is nearly always lower than Galactic by a factor ranging from ∼3 up to ∼100. Other observational results ind...

We have studied the efficiency of spin-exchange optical pumping SEOP in cells that contain either pure rubidium, mixtures of rubidium and potassium, or pure potassium. Optical pumping was performed with spectrally narrowed diode array lasers operating at either the wavelength of the Rb 5s1/2 -5p1/2 transition 795 nm or the K 4s1/2 -4p1/2 transition 770 nm . Calculations of the expected efficien...

Reaction centers (RCs) from four species of purple bacteria, Rhodobacter sphaeroides, Rhodobacter capsulatus, Rhodospirillum rubrum, and the recently discovered bacterium Rhodospirillum centenum, have been characterized by optical spectroscopy [Wang, S., Lin, X., Woodbury, N. W., & Allen, J. P. (1994) Photosynth. Res. (submitted for publication)] and magnetic resonance spectroscopy. All RCs con...