Abstract A standalone, lightweight, portable, FPGA-based triple to double coincidence ratio (TDCR) system is developed. The optical chamber of the fabricated in a dual, coaxial cylindrical geometry, with inner cylinder made up Teflon and outer one aluminium. Three square PMTs, each having an active cathode area 2.3 cm × cm, are housed chamber. variation detection efficiency identify optimum kB ...

purpose: to compare anterior segment and ocular biometric parameters of unaffected fellow eyes of patients with a previous attack of acute angle closure (aac), primary angle closure suspect (pacs) eyes, and normal eyes; and to assess the risk of developing aac in pacs. methods: in this prospective comparative observational case series, 16 unaffected fellow eyes of patients with a previous attac...

purpose: to evaluate changes in anterior chamber (ac) parameters before and one month after nd:yag capsulotomy. methods: a total of 30 eyes from 27 patients with posterior capsule opacification graded 2-4 with surgical history of uneventful phacoemulsification and acrylic foldable iol implantation were included in this study. before capsulotomy and one month later, anterior chamber depth, volum...

Abstract The agglomeration by acoustic waves is a phenomenon in which the vibration of fine particles induced irradiating suspended atmosphere with ultrasonic waves, and collided adhere to each other causing frequent collisions between particles, thereby increasing particle size. Ultrasonic an aerosol flowing circular tube using conventional method sound field different diameter from duct cause...

Nine blasts with cylindrical granite specimens were carried out under different stemming conditions. All rock had a diameter of 240 mm and length 300 mm. Explosive Pentaerythritol tetranitrate (PETN) specific charges 0.2 0.3 kg/m3 used, the in large explosion chamber. Each specimen was enclosed by steel box chamber during blasting, without constraint or confinement to from lateral top sides. Du...

In the International Atomic Energy Agency's (IAEA) code of practice (TRS 398) and the American Association of Physicists in Medicine's dosimetry protocol (TG-51), full-scatter water phantoms are recommended for the determination of the absorbed dose for both photon and electron beams and, consequently, for the calibration of the user's ionization chambers. This procedure is applied in the Secon...

Recent dosimetry protocols for clinical high-energy electron beams recommend measurements of absorbed dose-to-water with a plane-parallel or cylindrical ionization chamber. For well-guarded plane-parallel ionization chambers, the ionization chamber perturbation factor in water, p(Q), has a recommended value of unity in all protocols. This assumption was investigated in detail in this study for ...

We present an isothermal chamber designed and realized at the Italian Metrological Institute (INRiM) to stabilize temperature of a quartz cell for Doppler-broadened precision spectroscopy mercury atoms in UV region practical realization new definition kelvin. The challenge this apparatus is capability control, with great accuracy, non-cylindrical cavity containing vapors. was actively controlle...