NEW NON-SEXUAL SKELETAL ABNORMALITIES IN ACARTIA LILLJEBORGH GIESBRECHT, 1889 (COPEPODA, CALANOIDA)

State of Sao Paulo Research Foundation (FAPESP)

Os objetivos da circunavegação da U.S. Exploring Expedition (1838-1842): longitude, mapeamento náutico e instituição das coordenadas geográficas modernas

Analisa o principal objetivo da viagem científica de circunavegação realizada pelos EUA entre 1838 e 1842. A tarefa de mapeamento destaca-se entre outras metas científico-estratégicas da viagem exploratória. A iniciativa da empreitada foi movida pela busca da exata localização em alto-mar após a instituição do sistema de longitudes, quando cartas náuticas e mapas de vários países foram conferidos, e outros, novos, desenhados. Os EUA participaram desse esforço internacional, dando início à constituição de um sistema cartográfico próprio.

Monte Carlo Semi-Empirical Model for Si(Li) X-Ray Detector: Differences between Nominal and Fitted Parameters.

A detailed characterization of a X-ray Si(Li) detector was performed to obtain the energy dependence of efficiency in the photon energy range of 6.4 - 59.5 keV. which was measured and reproduced by Monte Carlo (MC) simulations. Significant discrepancies between MC and experimental values were found when lhe manufacturer parameters of lhe detector were used in lhe simulation. A complete Computerized Tomagraphy (CT) detector scan allowed to find the correct crystal dimensions and position inside the capsule. The computed efficiencies with the resulting detector model differed with the measured values no more than 10% in most of the energy range.

Modelización econométrica a través de cadenas de Markov de Monte Carlo (MCMC) en valoración contingente

Doctorado en Análisis Económico. Programa en Análisis Económico Aplicado

Biología del salmón del alto Polymixia nobilis Lowe, 1838 (Osteichthyes, Polymixiidae) en las Islas Canarias (Atlántico NE)

Memoria presentada para la obtención del Diploma Acreditativo de Estudios Avanzados

Edad y crecimiento del sargo picudo Diplodus puntazzo (Cetti, 1777) y del sargo breado Diplodus cervinus cervinus (Lowe, 1838) en aguas de Gran Canaria

[ES] Este artículo es un adelanto de los resultados de la Tesis Doctoral que está realizando la autora y la que es dirigida por la Dra. Mª del Pino Palacios Díaz, del departamento de Patología animal, Producción animal, Bromatología y Tecnología de los alimentos. La finalidad del presente estudio es comprobar la viabilidad de un sistema de riego enterrado que incremente la seguridad sanitaria en el reuso de aguas depuradas para la producción de forraje en Canarias, disminuya el consumo de este recurso y facilite las operaciones de cultivo en las zonas regadas. Los datos que se presentan a continuación son los correspondientes a una fase de puesta en marcha del sistema. Ha sido financiado con una beca INNOVA dentro de un proyecto bajo convenio entre el Consejo Insular de Aguas y la Granja Agrícola Experimental de GC y la ULPGC.

Paralelización del algoritmo Monte Carlo Ray Tracing para Comunicaciones Ópticas Submarinas

Máster Universitario en Sistemas Inteligentes y Aplicaciones Numéricas en Ingeniería (SIANI)

Monte Carlo Simulations of Novel Scintillator Detectors and Dosimetry Calculations

Monte Carlo (MC) simulation techniques are becoming very common in the Medical Physicists community. MC can be used for modeling Single Photon Emission Computed Tomography (SPECT) and for dosimetry calculations. 188Re, is a promising candidate for radiotherapeutic production and understanding the mechanisms of the radioresponse of tumor cells "in vitro" is of crucial importance as a first step before "in vivo" studies. The dosimetry of 188Re, used to target different lines of cancer cells, has been evaluated by the MC code GEANT4. The simulations estimate the average energy deposition/per event in the biological samples. The development of prototypes for medical imaging, based on LaBr3:Ce scintillation crystals coupled with a position sensitive photomultiplier, have been studied using GEANT4 simulations. Having tested, in the simulation, surface treatments different from the one applied to the crystal used in our experimental measurements, we found out that the Energy Resolution (ER) and the Spatial Resolution (SR) could be improved, in principle, by machining in a different way the lateral surfaces of the crystal. We have then studied a system able to acquire both echographic and scintigraphic images to let the medical operator obtain the complete anatomic and functional information for tumor diagnosis. The scintigraphic part of the detector is simulated by GEANT4 and first attempts to reconstruct tomographic images have been made using as method of reconstruction a back-projection standard algorithm. The proposed camera is based on slant collimators and LaBr3:Ce crystals. Within the Field of View (FOV) of the camera, it possible to distinguish point sources located in air at a distance of about 2 cm from each other. In particular conditions of uptake, tumor depth and dimension, the preliminary results show that the Signal to Noise Ratio (SNR) values obtained are higher than the standard detection limit.