This paper provides a proof, based on a method of embedding, of a variation of parameters formula for non-linear Volterra integral equations x(t) = g(t) + âˆ« t t0 k(t, s,x(s))ds (t â‰¥ t0) subjected to a general type of variation of the equation, illustrated by y(t) = g(t) + âˆ« t t0 k(t, s,y(s))ds+ Î¾(t). The formula is related to a classical formula forâ€¦ (More)

A Monte Carlo study of the energy-response factor of aluminium oxide (Al2O3) and lithium fluoride (LiF) TLDs in kilovoltage and megavoltage photon beams relative to 60Co gamma rays has been performed using EGSnrc Monte Carlo simulations. The sensitive volume of the detector was simulated as a disc of diameter 2.85 mm and thickness 1 mm. The phantom materialâ€¦ (More)

A Monte Carlo study of the energy response of an aluminium oxide (Al(2)O(3)) detector in kilovoltage and megavoltage photon beams relative to (60)Co gamma rays has been performed using EGSnrc Monte Carlo simulations. The sensitive volume of the Al(2)O(3) detector was simulated as a disc of diameter 2.85 mm and thickness 1 mm. The phantom material was waterâ€¦ (More)