A comparison of air kerma-length product determinations for standard radiation qualities defined for use in computed tomography (CT) was performed between the PTB and the IAEA as EURAMET project #1327, registered in the KCDB as the EURAMET.RI(I)-S12 comparison. A pencil type reference-class ionization chamber of the IAEA and the three RQT beam qualities established according to the IEC standard...

In this paper, the effect of pressure, temperature and impurity on the energylevels, binding energy, linear and nonlinear optical properties of a modified Gaussianquantum dot are studied. In this regard, the finite element method is employed to solvethe single electron Schrodinger equation in the effective mass approximation with andwithout impurity at the center of the dot. In addition, the en...

in this work an analytical equation of state has been employed to calculate the pvt properties ofternary refrigerant mixtures. the theoretical eos is that of ihm, song and mason, which is based onstatistical-mechanical perturbation theory, and the two constants are enthalpy of vaporization δhvapand molar density ρnb, both at the normal boiling temperature. the following three temperaturedepende...

BACKGROUND AND OBJECTIVES Irradiation of whole blood and blood components before transfusion is currently the only accepted methodology to prevent transfusion-associated graft-vs.-host disease. In the present work, we developed an automated system for blood bag storage during irradiation, using a teletherapy unit. MATERIALS AND METHODS A device with two thermal compartments was constructed in...

We define a set of orthogonal functions on the complex projective space CPN−1, and compute their Clebsch-Gordan coefficients as well as a large class of 6–j symbols. We also provide all the needed formulae for the generation of high-temperature expansions for U(N)-invariant spin models defined on CPN−1.

In this study, response surface methodology (RSM) based on central composite design (CCD) was applied for investigation of the effects of ultrasonic waves, temperature and solvent concentration on viscosity reduction of residue fuel oil (RFO). Ultrasonic irradiation was employed at low frequency of 24 kHz and power of 280 W. The results showed that the combination of ultrasonic waves and solven...

introduction: in spite of large number of studies regarding relation between thyroid cancer and childhood irradiation, contraversy still exists management of these patients. this study tries to find optimal method of thyroid evaluation in this group. methods and patients: in a recall program using mass media in khorasan, all patients with childhood irradiation were invited for thyroid evaluatio...

At threshold irradiation (•—0.1 w./cm.) of the rabbit cornea with a carbon dioxide (COi) laser, there was no detectable rise in intraocular pressure and only a slight (1 to 2° C.) rise in aqueous temperature. On suprathreshold COt corneal irradiation, the intraocular pressure rose to a plateau, during irradiation and then gradually fell. There was a concomitant rise in temperature in the anteri...

it has been shown that the boltzmann equation for the viscosity of the a-phase of superfluid 3he at low temperatures has the same form as for a normal ferrni liquid. the viscosity coefficients a, b, c, d and e are derived exactly. the h , parameter plays an important role in determining the temperature dependence of the viscosity coefficients