Building on the base of existing telescopes Event Horizon Telescope (EHT) and ALMA, next-generation EHT (ngEHT) aspires to deploy ?10 more stations. The ngEHT targets an angular resolution ?15 microarcseconds. This is achieved using Very Long Baseline Interferometry (VLBI) at shortest radio wavelengths ?1 mm. Submillimeter Array (SMA) both a standalone interferometer station will conduct observ...

during the 6-m period, 24 patients with acute scrotal pain were referred to the nuclear medicine department of shaheed labbafi-nejad hospital. their age ranged from 9 to 84 (mean 28.8) years. twelve scans were selected for the study. the scans were performed on angiographic and static phases, using tc-pertechnetate. of the above mentioned cases, one had acute testicular torsion (pre and post op...

The extensive use of diesel-powered equipment in mines makes the exposure to diesel aerosols a serious occupational issue. The exposure metric currently used in U.S. underground noncoal mines is based on the measurement of total carbon (TC) and elemental carbon (EC) mass concentration in the air. Recent toxicological evidence suggests that the measurement of mass concentration is not sufficient...

For meeting the requirements of the high-speed Internet and satisfying the Internet users, building fast routers with high-speed IP address lookup engine is inevitable. Regarding the unpredictable variations occurred in the forwarding information during the time and space, the IP lookup algorithm should be able to customize itself with temporal and spatial conditions. This paper proposes a new ...

This paper presents finite element analysis (FEA) of a coated and uncoated cylinder heads of a diesel engine to examine the distribution of temperature and stress. A thermal barrier coating system was applied on the combustion chamber of the cylinder heads, consists of two-layer systems: a ceramic top coat (TC), made of yttria stabilized zirconia (YSZ), ZrO2-8%Y2O3 and also a metallic bond coat...

We study a class of cyclic Brownian heat engines in the framework of finite-time thermodynamics. For infinitely long cycle times, the engine works at the Carnot efficiency limit producing, however, zero power. For the efficiency at maximum power, we find a universal expression, different from the endoreversible Curzon-Ahlborn efficiency. Our results are illustrated with a simple one-dimensional...

We describe haematological and DNA characterization of haemoglobinopathies in Thai adolescents caused by compound heterozygosities for Hb E [beta26(B8) Glu-Lys] and two other beta-globin chain variants, Hb Pyrgos [beta83(EF7) Gly-Asp] and Hb J Bangkok [beta56(D7) Gly-Asp]. Hb analysis demonstrated that although these two beta-chain variants have separated elution profiles on liquid chromatograp...

urinary tract infection (uti) is a common disease in childhood specially in female. in this study 50 patients with stablished diagnosis of uti were evaluated by both renal scan with tc-99m dmsa and renal sonography. the study revealed that most urinary tract infections are in children, female sex between 5-9 years of age. therefore the most important complications (renal scarring) are also comm...