Interactive graphics has been limited to simple direct illumination that commonly results in an artificial appearance. A more realistic appearance by simulating global illumination effects has been too costly to compute at interactive rates. In this paper we describe a new Monte Carlo-based global illumination algorithm. It achieves performance of up to 10 frames per second while arbitrary chan...

Background: Monte Carlo and experimental relative dose determination in a water phantom, due to a high dose rate (HDR) 192Ir source is presented for real energy spectrum and monochromatic at 356 keV. Materials and Methods: The dose distribution has been calculated around the 192Ir located in the center of 30 cm ×30 cm ×30 cm water phantom using MCNP4C code by Monte Carlo method. Relati...

Background: Iodine brachytherapy sources with low photon energies have been widely used in treating cancerous tumors. Dosimetric parameters of brachytherapy sources should be determined according to AAPM TG-43U1 recommendations before clinical use. Monte Carlo codes are reliable tools in calculation of these parameters for brachytherapy sources. Materials and Methods: Dosimetric param...

We describe a fast, accurate method for determination of the optical coefficients of 'semi-infinite' and 'infinite' turbid media. For the particular case of time-resolved reflectance from a biological medium, we show that a single Monte Carlo simulation can be used to fit the data and to derive the absorption and reduced scattering coefficients. Tests with independent Monte Carlo simulations sh...

For fast computation of drain current in Nano-MOSFET, we have developed a new backscattering model based on the accurate determination of ballistic and backscattering probabilities along the channel. The main elements of this model are deduced from careful analysis of transport in devices using Monte Carlo simulation. The backscattering coefficient is in very good agreement with the results of ...

A Monte Carlo program is presented that computes all four fermion processes in e + e − annihilation. QED initial state corrections and QCD contributions are included. Fermions are taken to be massless, allowing a very fast evaluation of the matrix element. A systematic, modular and self-optimizing strategy has been adopted for the Monte Carlo integration, that serves also as an example for furt...

We show that the latest version of massively parallel processing associative string processing architecture (System-V) is applicable for fast Monte Carlo simulation if an effective on-processor random number generator is implemented. Our lagged Fibonacci generator can produce 10 random numbers on a processor string of 12K PE-s. The time dependent Monte Carlo algorithm of the one-dimensional non...

In this paper, we present a very fast Monte Carlo scheme for additive processes: the computational time is of same order magnitude standard algorithms Brownian motions. We analyze in detail numerical error sources and propose technique that reduces two major error. also compare our results with benchmark method: jump simulation Gaussian approximation. show an application to normal tempered stab...