Neutrino-cooled hyperaccretion disks around stellar mass black holes are plausible candidates for the central engine of gamma-ray bursts. We calculate the one-dimensional structure and the annihilation luminosity of such disks. The neutrino optical depth is of crucial importance in determining the neutrino cooling rate and is in turn dependent on the electron fraction, the free nucleon fraction...

The technology of producing a composite material in situ envisages the pre-saturation an AlSi7Fe1 melt with hydrogen; afterwards, is blown oxygen until hydrogen dissolved burned out. content was researched during manufacturing process material; before blowing, and at incomplete complete burning out hydrogen. interrelation between absorbed aluminum oxide fraction identified. A mathematical model...

the purpose of this study was to investigate the effect of heat treatment including solution treatment and aging on the microstructure of cast nickel-based in100 superalloy including size, volume fraction and morphology of primary γ' and different kinds of carbides. for this purpose, different solution heat treatment cycles and a constant aging cycle were implemented on cast ingot samples and t...

In the preceding paper I a class of hapten-binding lymphocyte receptor molecules was described which lack detectable serological determinants of conventional immunoglobufin constant domains but appear to carry heavy chain variable portions. These receptor molecules which we call the anti-lgfraction as well as receptor molecules expressing class-specific imunoglobulin determinants-the so-called ...

We report the demonstration of a heat-fraction-limited CW Yb:YAG laser operating near 77 K with output at 1029 nm, pumped with a diffraction-limited room-temperature CW Nd:YAG laser operating at 946 nm. With a 50% reflectivity outcoupler, the average threshold absorbed pump power was 18.8 mW and the average slope efficiency 91.9%, close to the heat-fraction limited value of 91.5%. Average optic...

To understand luminous AGNs in the z < 1 universe, the ASCA AGN samples are the best at present. Combining the identified sample of AGNs from ASCA Large Sky Survey and Medium Sensitivity Survey, the sample of hard X-ray selected AGNs have been expanded up to 108 AGNs above the flux limit of 10 erg s cm in the 2–10 keV hard X-ray band. We discuss the fraction of absorbed AGNs in the hard X-ray s...

Adenosine has a major regulatory function in the heart and many tissues. Our previous work showed that a cytosolic (not a membrane, as previously hypothesized) 5'-nucleotidase from dog heart has the kinetic properties consistent with it being the enzyme responsible for adenosine formation from adenosine 5'-monophosphate (AMP) in response to hypoxia or ischemia. In the present study, we evaluate...

The paper describes dosimetric models that allow the estimation of average radiation exposures to terrestrial biota due to environmental sources in the soil as well as internal uniform distributions of radionuclides. Simple three-dimensional phantoms for 13 faunal reference organisms are specified. The calculation of absorbed dose per unit source strength for these targets is based on photon an...

PURPOSE Radiopharmaceutical applications in nuclear medicine require a detailed dosimetry estimate of the radiation energy delivered to the human tissues. Over the past years, several publications addressed the problem of internal dose estimate in volumes of several sizes considering photon and electron sources. Most of them used Monte Carlo radiation transport codes. Despite the widespread use...

A microwave plasma generator (MPG) of a sub-millimeter scale might be suitable for biomedical applications. However, there are still many unknowns regarding the MPG discharge behavior at this and specific conditions. two-dimensional model millimeter its simulation relative calculation in COMSOL Multiphysics software presented. filled with argon helium is simulated, respectively. The frequency s...