Radiosurgery or stereotactic radiosurgery was invented by Swedish neurosurgeon Lars Leksell in 1951. defined as “delivery of a single, high dose irradiation to small and critically located intracranial volume through the intact skull.” His initial efforts were focused on developing noninvasive method create lesions within brain, using radiation rather than conventional blade. In 1968, first Gam...

BACKGROUND To date, the estimated radiation-absorbed dose to organs and tissues in patients undergoing diagnostic examinations in nuclear medicine is derived via calculations based on models of the human body and the biokinetic behaviour of the radiopharmaceutical. An internal dosimetry computer program, IDAC-Dose2.1, was developed based on the International Commission on Radiological Protectio...

For the CIR equation dXt = (θ − kXt) dt + σ √ Xt dBt, we propose positive weak firstand second-order approximations that use, at each step, generation of discrete (respectively twoand three-valued) random variables (Theorems 3 and 4). The equation is split into deterministic part dDt = (θ − kDt) dt, which is solved exactly, and stochastic part dSt = σ √ St dBt, which is actually approximated in...

This note derives the shapes of the yield curve as a function of the current spot rate under Cox, Ingersoll, and Ross (CIR) (1985b) single factor model. Corresponding results reported in CIR are shown to be incorrect.

Within this paper is presented information about current study of radon and radium analysis in self-bottled drinking water from the public fountain “Elixir” Moklište area, city Kavadarci. Obtained results for measurements, preventive method taken samples, ranged 3.40 up to 3.69 Bq·l–1, while values typical samples 2.60 3.62 Bq·l–1. Radon concentration measured obtained way showed lower than cor...

A natural radioactivity in thermal water was investigated based on 19 selected waters from Poland. The analysed results show that the radionuclides’ concentrations study vary over a wide range. temperature of varies above 20 °C to 80 °C. are characterised by different mineralisation, chemical compositions, and belong hydrochemical types. There is good correlation between depths aquifer formatio...

This article presents a multimethod, multi-informant comparison of community samples of committed gay male (n=30) and lesbian (n=30) couples with both committed (n=50 young engaged and n=40 older married) and noncommitted (n=109 exclusively dating) heterosexual pairs. Specifically, in this study the quality of same- and opposite-sex relationships was examined at multiple levels of analysis via ...