846 resultados para Radiotherapy Planning, Computer-Assisted


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We present a purposeful initiative to open new grounds for teaching Geometrical Optics. It is based on the creation of an innovative education networking involving academic staff from three Spanish universities linked together around Optics. Nowadays, students demand online resources such as innovative multimedia tools for complementing the understanding of their studies. Geometrical Optics relies on basics of light phenomena like reflection and refraction and the use of simple optical elements such as mirrors, prisms, lenses, and fibers. The mathematical treatment is simple and the equations are not too complicated. But from our long time experience in teaching to undergraduate students, we realize that important concepts are missed by these students because they do not work ray tracing as they should do. Moreover, Geometrical Optics laboratory is crucial by providing many short Optics experiments and thus stimulating students interest in the study of such a topic. Multimedia applications help teachers to cover those student demands. In that sense, our educational networking shares and develops online materials based on 1) video-tutorials of laboratory experiences and of ray tracing exercises, 2) different online platforms for student self-examinations and 3) computer assisted geometrical optics exercises. That will result in interesting educational synergies and promote student autonomy for learning Optics.

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La condición tridimensional de la construcción edificatoria precisa del uso del dibujo en 3D como la mejor herramienta de proyecto y transmisión de conocimientos técnicos y formales. El objetivo de esta comunicación es mostrar la aplicación de la expresión gráfica en 3D en un análisis histórico sobre la evolución de la envolvente industrializada en arquitectura, identificando sus principales condicionantes técnicos y constructivos. El estudio compara la evolución del uso de sistemas constructivos industrializados mediante un análisis gráfico de las soluciones constructivas más destacables. La metodología empleada se basa en la identificación y estudio de determinados sistemas constructivos industrializados compuestos por materiales ligeros así como de obras de arquitectura representativas por su influencia en la evolución de la envolvente arquitectónica en la segunda mitad del siglo XX. La representación gráfica en 3D ayuda a comparar las obras analizadas desde aspectos tecnológicos y formales, constatándose la utilidad del dibujo asistido por ordenador en el análisis constructivo realizado. En conclusión, el uso del dibujo arquitectónico en 3D contribuye, por la mejor comprensión de las características espaciales de las soluciones constructivas, al análisis de las propiedades materiales y funcionales de los sistemas constructivos industrializados y su aplicación al diseño arquitectónico, ayudando a perfeccionar su conocimiento e incrementando la calidad constructiva y compromiso social de las propuestas arquitectónicas.

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Gaining valid answers to so-called sensitive questions is an age-old problem in survey research. Various techniques have been developed to guarantee anonymity and minimize the respondent's feelings of jeopardy. Two such techniques are the randomized response technique (RRT) and the unmatched count technique (UCT). In this study we evaluate the effectiveness of different implementations of the RRT (using a forced-response design) in a computer-assisted setting and also compare the use of the RRT to that of the UCT. The techniques are evaluated according to various quality criteria, such as the prevalence estimates they provide, the ease of their use, and respondent trust in the techniques. Our results indicate that the RRTs are problematic with respect to several domains, such as the limited trust they inspire and non-response, and that the RRT estimates are unreliable due to a strong false "no" bias, especially for the more sensitive questions. The UCT, however, performed well compared to the RRTs on all the evaluated measures. The UCT estimates also had more face validity than the RRT estimates. We conclude that the UCT is a promising alternative to RRT in self-administered surveys and that future research should be directed towards evaluating and improving the technique.

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Thesis (M. S.)--University of Illinois at Urbana-Champaign.

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Includes bibliographical references.

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Originally presented as the author's thesis (M.A.), University of Illinois at Urbana-Champaign.

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Thesis (M.S.)--University of Illinois at Urbana-Champaign.

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Thesis (M. S.)--University of Illinois at Urbana-Champaign.

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Mode of access: Internet.

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Thesis--University of Illinois at Urbana-Champaign.

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Bibliography: p. 52.

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Description based on: 1985; title from caption.

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Thesis (Master's)--University of Washington, 2016-06