نتایج جستجو برای: carlo
تعداد نتایج: 70255 فیلتر نتایج به سال:
in this paper, we calculate electron and hole impactionization coefficients in in0.52al0.48as using a monte carlo modelwhich has two valleys and two bands for electrons and holesrespectively. also, we calculate multiplication factor for electronand hole initiated multiplication regimes and breakdown voltagein in0.52al0.48as pin avalanche photodiodes. to validate themodel, we compare our simulat...
ntroduction: monte carlo simulation is the most accurate method of simulating radiation transport and predicting doses at different points of interest in radiotherapy. a great advantage of the monte carlo method compared to the deterministic methods is the ability to deal accurately with any complex geometry. its disadvantage is the extremely long computing time r...
background: megavoltage beams used in radiotherapy are contaminated with secondary electrons. different parts of linac head and air above patient act as a source of this contamination. this contamination can increase damage to skin and subcutaneous tissue during radiotherapy. monte carlo simulation is an accurate method for dose calculation in medical dosimetry and has an important role in opt...
introduction: due to the large number of pet systems available in the market, it is not very easy to decide about the scanner of choice. conducting a research in order to compare all different pet scanners is very time consuming and expensive and practically impossible. however, such comparison may be conducted using pet simulators. in this study, the performance of 6 different pet scanners in ...
background: recent pre-clinical and clinical studies indicate that irradiation in the dose range of 15 to 30 gy can reduce rate of restenosis in patients who have undergone an angioplasty. the use of filled balloon with radioactive solution was proposed as one of the possible intravascular irradiation techniques. materials and methods: the monte carlo n-particle transport code (mcnp4b) was used...
1 Genetics of Neurodegenerative and Metabolic Diseases Unit, IRCCS-Fondazione Istituto Neurologico Carlo Besta, via Celoria 11, 20133 Milan, Italy 2 Clinic of Central and Peripheral Degenerative Neuropathies Unit, IRCCS-Fondazione Istituto Neurologico Carlo Besta, via Celoria 11, 20133 Milan, Italy 3 Clinical Neurophysiology Unit, IRCCS-Fondazione Istituto Neurologico Carlo Besta, via Celoria 1...
Since its first description fifty years ago, the Metropolis Monte Carlo method has been used in a variety of different ways for the simulation of continuum quantum many-body systems. This paper will consider some of the generalizations of the Metropolis algorithm employed in quantum Monte Carlo: Variational Monte Carlo, dynamical methods for projector monte carlo (i.e. diffusion Monte Carlo wit...
A description of Monte Carlo methods for simulation of proteins is given. Advantages and disadvantages of the Monte Carlo approach are presented. The theoretical basis for calculating equilibrium properties of biological molecules by the Monte Carlo method is presented. Some of the standard and some of the more recent ways of performing Monte Carlo on proteins are presented. A discussion of the...
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