Validation of GATE 6.1 for targeted radiotherapy of metastic melanoma using 131I-labeled benzamide

International audienceThe GATE 6.1 Monte Carlo simulation platform based on the GEANT4 toolkit is in constant improvement for dosimetric calculations. Here, we explore its use for calculating internal absorbed dose distribution in mice for the treatment of malignant melanoma after injection of a new specific radiopharmaceutical labeled with iodine 131. We estimate the dosimetric accuracy of GATE 6.1, by calculating first S values and by comparing them and absorbed doses to organswith EGSnrc for a digital mouse phantom and a CT scan based mouse phantom

A design optimization framework for enhanced compressor stability using dynamic system modeling

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.Includes bibliographical references (p. 95-96).by Vincent P. Perrot.S.M

A flow microdevice for studying the initiation and propagation of a single pit

International audienceA novel experimental setup in which a glass microcapillary can be precisely positioned close to a metallic electrode has been developed to locally inject aggressive solutions at will. It has been used for studying the pitting corrosion of a 316L stainless steel in 0.5 M H2SO4 medium. The amount of chloride ions released by the capillary could be controlled and the analysis of the corrosion products by scanning electron microscopy and energy dispersive X-ray spectroscopy showed there was no selective dissolution of the 316L stainless steel. This device was shown to be an efficient tool for understanding localized corrosion. (c) 2012 Elsevier Ltd. All rights reserved

Étude de la corrosion du cuivre par microélectrochimie: Comparaison entre microélectrode et microcellule

Ce travail présente la comparaison de mesures électrochimiques réalisées à l'aide d'une microcellule et de microélectrodes conventionnelles. Des mesures de voltamétrie cyclique et d’impédances électrochimiques ont été réalisées sur des électrodes de cuivre pur, électrode classique couplée à des capillaires et microélectrodes, au potentiel de corrosion dans une solution NaCl 0,1 M, La comparaison entre ces deux types de mesure apporte des informations relatives à leurs sensibilités et limitations. En particulier, le domaine des basses fréquences du diagramme d’impédance est sensible à la géométrie de la microcellule ainsi qu'au positionnement relatif des électrodes

Ergodic encoding for single-element ultrasound imaging in vivo

Conventional ultrasound imaging relies on the computation of geometric time delay from multiple sensors to detect the position of a scatterer. In this paper, we present Ergodic Relay Ultrasound Imaging (ERUI), a method that utilizes an ergodic cavity down to a single ultrasonic sensor for ultrasound imaging. With the proposed method, the ergodic cavity creates a unique temporal signature that encodes the position of a scatterer. When compared to standard approaches, ERUI enables the generation of images of comparable quality while utilizing fewer detector elements. Our results suggest that ERUI has the potential to achieve image resolution similar to that of traditional imaging techniques, shifting the complexity from hardware to sofware. The demonstrated feasibility offers a promising path towards ultrasound probes with reduced costs and complexity for more portable scanning devices.Comment: 5 pages, 4 figures, Lette

A Compact and Lightweight Fibered Photometer for the PicSat Mission

PicSat is a nanosatellite developed to observe the transit of the giant planet β Pictoris, expected in late 2017. Its science objectives are: the observation of the transit of the giant planet’s Hill sphere, the detection of exocomets in the system, and the fine monitoring of the circumstellar disk inhomogeneities. To answer these objectives without exceeding the possibilities of a 3-unit Cubesat in terms of mass and power budget, a small but ambitious 2 kg opto-mechanical payload was designed. The instrument, specifically made for high precision photometry, uses a 3.7 cm effective aperture telescope which injects the light in a single-mode optical fiber linked to an avalanche photodioode. To ensure the stability of the light injection in the fiber, a fine pointing system based on a two-axis piezoelectric actuation system, is used. This system will achieve a sub-arcsecond precision, and ensure that an overall photometric precision of at least 200 ppm/hr can be reached

Scikit-learn: Machine Learning in Python

International audienceScikit-learn is a Python module integrating a wide range of state-of-the-art machine learning algorithms for medium-scale supervised and unsupervised problems. This package focuses on bringing machine learning to non-specialists using a general-purpose high-level language. Emphasis is put on ease of use, performance, documentation, and API consistency. It has minimal dependencies and is distributed under the simplified BSD license, encouraging its use in both academic and commercial settings. Source code, binaries, and documentation can be downloaded from http://scikit-learn.sourceforge.net

AGE AND GENDER-RELATED SYMPTOMS RECURRENCE AFTER AV NODE RE-ENTRANT TACHYCARDIA

International audienc

Функционирование маркетинговых терминов в английском языке и способы их перевода на русский язык

Целью исследования является определение способов перевода английской терминологии на русский язык