We present deep H i observations of the compact high-velocity cloud HVC125+41–207 using the 100m Effelsberg telescope. Our goal was in particular to study the warm neutral medium (WNM) in detail. The Effelsberg data reveals a two phase core/halo structure – one component with a velocity width of FWHM ≈ 5 km s (Westerbork data show FWHM ≈ 2 km s, Braun & Burton 2000) and one with FWHM ≈ 18 km s....

We have investigated the optimization of Al0.2Ga0.8N layers directly grown on sapphire by metalorganic vapor phase epitaxy (MOVPE). The quality of the AlGaN epilayers was improved by in situ nano-masking employing ultra-thin SiNx interlayers. Transmission electron microscopy (TEM) investigations reveal an enormous reduction of edge-type dislocations by SiNx nano-masking. Furthermore, formation ...

The PL of porous GaN sample shows higher intensity with smaller FWHM and red-shifting relative to the as-grown sample. The energy gap for porous GaN sample was smaller compare to the as-grown sample. The SEM surface image of UV-assisted electrochemical etching process is shown a shape and size of pore which was formed on the surface of the GaN, therefore the shape of pores formed was in spheric...

InP-based quantum dots (QDs) have attracted much attention for use in optical applications, and several types of QDs such as InP/ZnS, InP/ZnSeS, and InP/GaP/ZnS have been developed. However, early synthetic methods that involved rapid injection at high temperatures have not been able to reproducibly produce the required optical properties. They were also not able to support commercialization ef...

The cross-sectional area of a blood vessel determines its resistance, and thus is a regulator of local blood flow. However, the cross-sections of penetrating vessels in the cortex can be non-circular, and dilation and constriction can change the shape of the vessels. We show that observed vessel shape changes can introduce large errors in flux calculations when using a single diameter measureme...

BxGa1–xN films were deposited on 6H-SiC (0001) substrates at 1000°C by low pressure MOVPE using diborane, trimethylgallium, and ammonia as precursors. The presence of boron was detected by Auger scanning microprobe, the shift of the (00.2) x-ray diffraction peak, and low-temperature photoluminescence. A single-phase BxGa1–xN alloy with x = 1.5% was produced at the gas phase B/Ga ratio of 0.005....

OBJECTIVE We developed a modification of the acquisition zoom technique, referred to as differential magnification (DM), to improve the pixel resolution with fanbeam collimators. This study evaluated the effects of DM on brain SPECT image quality. METHODS SPECT imaging was performed using a triple-head camera with and without DM for a line source in air, Jaszczak and Hoffman phantoms, and 15 ...

As a general rule of thumb the resolution light microscope (i.e., ability to discern objects) is predominantly described by full width at half maximum (FWHM) its point spread function (psf)—the diameter blurring density maximum. Classical wave optics suggests linear relationship between FWHM and also manifested in well-known Abbe Rayleigh criteria, dating back end 19th century. However, during ...