Spectra of Xand g-rays emitted by radioactive sources and of the radiation emitted by X-ray tubes, in the energy range 15±160 keV, have been measured with a silicon PIN photodiode at room temperature. The experimental Xray tube spectra are compared with calculated ones on the basis of a semi-empirical model. Results indicate that the method utilized is adequate for the characterization of X-ray...

Multiwall CNx nanotubes have been prepared by thermal decomposition of acetonitrile over Co/Ni catalytic particles. The fluorination of nanotubes was performed at roomtemperature by using a gaseous mixture of BrF3 and Br2. Transmission electron microscopy (TEM) and x-ray diffraction (XRD) indicated that only the outer shells of CNx nanotubes were fluorinated, whereas the inner shells remained i...

We present methods combining backscattered-electron (BSE) mosaic imaging, quantitative spot-mode electron-probe microanalysis (EPMA), and quantitative compositional mapping by EPMA and micro-xray fluorescence (μXRF) to provide a framework for detailed analysis of terrestrial and lunar samples. BSE imaging provides a base map for the characterization of samples by EPMA. Recent developments in im...

High-energy-resolution fluorescence-detected Xray absorption spectroscopy (HERFD-XAS) has been applied to study the chemical state of ∼1.2 nm size-selected Pt nanoparticles (NPs) in an electrochemical environment under potential control. Spectral features due to chemisorbed hydrogen, chemisorbed O/ OH, and platinum oxides can be distinguished with increasing potential. Pt electro-oxidation foll...

Magnetars are rotating neutron stars with extremely strong magnetic fields (∼ 10−10G). Xray and soft gamma-ray observations have revealed the existence of non-thermal particle populations which may suggest emission of very high energy photons. VERITAS, an array of four 12m imaging atmospheric Cherenkov telescopes, is designed to observe gamma-ray emission between 100 GeV and 30 TeV. Here we pre...

Results 54 people, 35 females, 19 males, average 80. 19 patients showed one fragility fracture. The risk of falls was absent in 21 patients, light in 3 patients, middle in 10 patients, high in 20 patients. The BMD was osteoporotic in 37 patients, osteopenia in 8 patients, normal in 6 patients. All patients showed ipo-vitaminosys D. we could make xray in 16 patients only. This was this was the r...

Background - Meckels diverticulum is a congenital malformation caused by malabsorption of the yolk intestine. It has been reported that left and right arteries, which are nutrient vessels, can become mesodiverticular bands cause intestinal obstruction in symptomatic diverticulum.Intestinalobstruction due to meso-diverticular band one rarest complications diverticulum.Mesodiverticular rarely sma...

Spatio-temporal filters are used to improve the quality of Xray image sequences exhibiting severe noise in real-time. The spatial and temporal ratios have to be adapted locally in order to avoid artifacts. We propose a method processing the positive and negative pixel values of difference images independently in order to detect regions dominated by motion and single pixels dominated by noise. I...

Mike Meier University of California, Davis September 13, 2004 Figure 1. FEG-SEM image of nanosized aluminum oxide powder. Note the magnification and the size of the micron bar. Also note how the smaller particles and the edges of the larger particles appear to be somewhat transparent. This is because much of the 5 kV electron beam can pass through these thinner parts of the particles. CRYSTALLI...

New radio observations of the radio-jet X-ray binary Circinus X-1 over nearly an entire 16.6-day orbit are presented. The source continues to undergo radio flaring in the phase interval 0.0 – 0.2 and appears to be brightening since observations in the early 1990s. The radio flux density is well correlated with simultaneous soft Xray monitoring from the XTE ASM, including a secondary flare event...