Duelos medicos, contra el theatro Critico de el Rmo. P. Fr. Benito Feyjoò, y contra la Palestra Medica del Padre Don Fr. Antonio Rodriguez... que en defensa, y desagravio de la Noble Facultad Medica, ofreciò al juicio de los curiosos, y doctos en Theoricos, Practicos, y Medicos Discursos /

Mode of access: Internet.

Las oraciones y cartas del padre de la eloqüencia Isócrates /

Mode of access: Internet.

Carta consolatoria a la ciudad de Guanajuato en la sensible muerte de su zeloso apostol el padre rector Ignacio Raphael Coromina .../

Mode of access: Internet.

Adiciones al año christiano del Padre Croiset segun el metodo del mismo padre : correspondientes á los meses de julio, agosto y septiembre : con la traduccion de las Epistolas, y Evangelios de estos meses /

Mode of access: Internet.

Adiciones al año christiano del padre Croiset segun el medo del mismo padre : correspondientes á los meses de octubre, noviembre y diciembre : con la traduccion de las Epistolas y Evangelios de estos meses /

Mode of access: Internet.

Las tardes de la granja ó Las lecciones del padre /

Encabezamiento tomado de Barbier,IV, col. 512.

Effects of collimator backscatter in an Elekta linac by Monte Carlo simulation

The effects of radiation backscattered from the secondary collimators into the monitor chamber in an Elekta linac (producing 6 and 10 MV photon beams) are investigated using BEAMnrc Monte Carlo simulations. The degree and effects of this backscattered radiation are assessed by evaluating the changes to the calculated dose in the monitor chamber, and by determining a correction factor for those changes. Additionally, the fluency and energy characteristics of particles entering the monitor chamber from the downstream direction are evaluated by examining BEAMnrc phase-space data. It is shown that the proportion of particles backscattered into the monitor chamber is small (<0.35 %), for all field sizes studied. However, when the backscatter plate is removed from the model linac, these backscattered particles generate a noticeable increase in dose to the monitor chamber (up to approximate to 2.4 % for the 6 MV beam and up to 4.4 % for the 10 MV beam). With its backscatter plate in place, the Elekta linac (operating at 6 and 10 MV) is subject to negligible variation of monitor chamber dose with field size. At these energies, output variations in photon beams produced by the clinical Elekta linear accelerator can be attributed to head scatter alone. Corrections for field-size-dependence of monitor chamber dose are not necessary when running Monte Carlo simulations of the Elekta linac operating at 6 and 10 MV.

Population Monte Carlo Algorithm in High Dimensions

The population Monte Carlo algorithm is an iterative importance sampling scheme for solving static problems. We examine the population Monte Carlo algorithm in a simplified setting, a single step of the general algorithm, and study a fundamental problem that occurs in applying importance sampling to high-dimensional problem. The precision of the computed estimate from the simplified setting is measured by the asymptotic variance of estimate under conditions on the importance function. We demonstrate the exponential growth of the asymptotic variance with the dimension and show that the optimal covariance matrix for the importance function can be estimated in special cases.

A cost-based optimization of a fiberboard pressing plant using Monte-Carlo simulation (a reliability program)

In this research the reliability and availability of fiberboard pressing plant is assessed and a cost-based optimization of the system using the Monte- Carlo simulation method is performed. The woodchip and pulp or engineered wood industry in Australia and around the world is a lucrative industry. One such industry is hardboard. The pressing system is the main system, as it converts the wet pulp to fiberboard. The assessment identified the pressing system has the highest downtime throughout the plant plus it represents the bottleneck in the process. A survey in the late nineties revealed there are over one thousand plants around the world, with the pressing system being a common system among these plants. No work has been done to assess or estimate the reliability of such a pressing system; therefore this assessment can be used for assessing any plant of this type.