774 resultados para Read-to-peer


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In a long table a row might split across a page and this may make the data harder to read. This default of a row being allowed to split can be changed, this video shows how.

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Description of how to conduct a peer review

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Since 2003 the School of Medicine at the Universidad del Rosario in Bogotá, Colombia, offers to the students a program named Peer Tutors. The program’s objectives are: to generate a social interaction mechanism that favors knowledge construction side by side with advanced peers; to promote the development of ethical, moral and coexistence oriented values through an academic experience, and to generate a space to explore specific academic interests and teacher´s potential. This article presents the theoretic frame that supports the importance of social interaction in knowledge construction, as well as some indicators that allow a first appraisal of the program. Several achievements that account for the synergic value of an experience that not only fulfills the function of initiating a process of teaching formation and academic support, but that also builds a proactive attitude before learning, are highlighted.

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Introducción: Las vacunas clásicamente han representado un método económico y eficaz para el control y prevención de múltiples enfermedades infecciosas. En los últimos años se han introducido nuevas vacunas contra neumococo a precios elevados, y los diferentes análisis económicos a nivel mundial de estas vacunas no muestran tendencias. El objetivo de este trabajo era resumir la evidencia existente a través de los diferentes estudios económicos evaluando las dos vacunas de segunda generación contra neumococo en la población a riesgo. Metodología: En este trabajo se realizo una revisión sistemática de la literatura en 8 bases de datos localizadas en diferentes partes del mundo y también que tuvieran literatura gris. Los artículos fueron inicialmente evaluados acorde a su titulo y resumen, posteriormente los elegidos se analizaron en su totalidad. Resultados: Se encontraron 404 artículos, de los cuales 20 fueron incluidos en el análisis final. Se encontró que la mayoría de los estudios se realizaron en áreas donde la enfermedad tiene una carga baja, como es Norte América y Europa, mientras que en los lugares del mundo donde la carga es mas alta, se realizaron pocos estudios. De igual manera se observo que la mayoría de los estudios mostraron por los menos ser costo efectivos respecto a la no vacunación, y en su totalidad las dos vacunas de segunda generación mostraron costo efectividad respecto a la vacunación con PCV-7. Los resultados de los estudios son muy heterogéneos, hasta dentro del mismo país, señalando la necesidad de guías para la conducción de este tipo de estudios. De igual manera, la mayoría de los estudios fueron financiados por farmacéuticas, mientras en un numero muy reducido por entes gubernamentales. Conclusiones: La mayoría de los estudios económicos sobre las vacunas de segunda generación contra neumococo han sido realizados en países con un alto índice de desarrollo económico y patrocinados por farmacéuticas. Dado que la mayoría de la carga de la enfermedad se encuentran en regiones con un menor nivel de desarrollo económico se deberían realizar mas en estas zonas. De igual manera, al ser la vacunación un asunto de salud publica y con un importante impacto económico los gobiernos deberían estar mas involucrados en los mismos.

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I look for classroom peer effects for psychoactive substance consumption among Colombian high school students and attempt to identify channels that rationalize for these effects. To do so, I use data for Colombian schools from 2011. I identify peer effects using household consumption behavior to instrument average classroom consumption. I find that an increase of 10% in the proportion of classroom users of alcohol, cannabis, and cocaine increases the probability of students to use alcohol, cannabis, and cocaine in 3.14%, 4.29%, and 2.38% respectively. I find no significant effect on cigarette smoking for the full sample but after exploring heterogeneous effects I find suggestive evidence that the effect is positive in some grades. I find some evidence that indicate that peer effects on alcohol, cannabis, and cocaine consumption operate through risk perception and easiness of access to psychoactive substances, meaning that the increase of likelihood of consumption could be explained because it is easier to access to drugs for students that interact with consumers or because a decrease in the risk students perceive of consuming these substances. Finally, through the use of a SUR and a 3SLS estimator I find strong correlations between smoking cigarettes and consuming cannabis (55 %), and cocaine (60 %).

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This paper provides recent evidence about the beneÖts of attending preschool on future performance. A non-parametric matching procedure is used over two outcomes: math and verbal scores at a national mandatory test (Saber11) in Colombia. It is found that students who had the chance of attending preschool obtain higher scores in math (6.7%) and verbal (5.4%) than those who did not. A considerable fraction of these gaps comes from the upper quintiles of studentís performance, suggesting that preschool matters when is done at high quality institutions. When we include the number of years at the preschool, the gap rises up to 12% in verbal and 17% in math.

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Hacer una tarta de plátano forma parte del capítulo de competencias. Con un texto sencillo y palabras que se repiten se da a los niños instrucciones de cómo hacer un postre muy simple. Las fotografías se usan para hacer los libros reales para las propias experiencias de los niños. Para los jóvenes lectores con edades comprendidas entre los cuatro y cinco años. Las palabras se introducen en el contexto real a través de diferentes tipos de texto.

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Forma parte de un programa de lectura para niños de hasta cinco años y cumple con los requisitos del currículo de Inglaterra, Gales y Escocia. Durante esta etapa, el niño se acerca a la lectura sobre la base de la comprensión de la relación entre imágenes y texto, y debe familiarse con el sentido de izquierda a derecha en que se efectua áquella. El profesor hace la lectura en voz alta para que los alumnos se familiaricen con los textos y tengan confianza en lo que leen. Son dos breves historias, una con más texto que la otra, que se apoyan sobre todo en las ilustraciones.

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Hacer un sombrero de papel forma parte del capítulo de competencias. Con un texto sencillo y palabras que se repiten se da a los niños instrucciones de cómo hacer un sombrero muy sencillo. Las fotografías se usan para hacer los libros reales para las propias experiencias de los niños. Para los jóvenes lectores con edades comprendidas entre los cuatro y cinco años. Las palabras se introducen en el contexto real a través de diferentes tipos de texto.

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Resum del seminari "How to review and get reviewed" sobre la revisió per experts (peer review), que va tenir lloc a la Universitat de Barcelona el 20 de juny de 2011

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The human visual ability to perceive depth looks like a puzzle. We perceive three-dimensional spatial information quickly and efficiently by using the binocular stereopsis of our eyes and, what is mote important the learning of the most common objects which we achieved through living. Nowadays, modelling the behaviour of our brain is a fiction, that is why the huge problem of 3D perception and further, interpretation is split into a sequence of easier problems. A lot of research is involved in robot vision in order to obtain 3D information of the surrounded scene. Most of this research is based on modelling the stereopsis of humans by using two cameras as if they were two eyes. This method is known as stereo vision and has been widely studied in the past and is being studied at present, and a lot of work will be surely done in the future. This fact allows us to affirm that this topic is one of the most interesting ones in computer vision. The stereo vision principle is based on obtaining the three dimensional position of an object point from the position of its projective points in both camera image planes. However, before inferring 3D information, the mathematical models of both cameras have to be known. This step is known as camera calibration and is broadly describes in the thesis. Perhaps the most important problem in stereo vision is the determination of the pair of homologue points in the two images, known as the correspondence problem, and it is also one of the most difficult problems to be solved which is currently investigated by a lot of researchers. The epipolar geometry allows us to reduce the correspondence problem. An approach to the epipolar geometry is describes in the thesis. Nevertheless, it does not solve it at all as a lot of considerations have to be taken into account. As an example we have to consider points without correspondence due to a surface occlusion or simply due to a projection out of the camera scope. The interest of the thesis is focused on structured light which has been considered as one of the most frequently used techniques in order to reduce the problems related lo stereo vision. Structured light is based on the relationship between a projected light pattern its projection and an image sensor. The deformations between the pattern projected into the scene and the one captured by the camera, permits to obtain three dimensional information of the illuminated scene. This technique has been widely used in such applications as: 3D object reconstruction, robot navigation, quality control, and so on. Although the projection of regular patterns solve the problem of points without match, it does not solve the problem of multiple matching, which leads us to use hard computing algorithms in order to search the correct matches. In recent years, another structured light technique has increased in importance. This technique is based on the codification of the light projected on the scene in order to be used as a tool to obtain an unique match. Each token of light is imaged by the camera, we have to read the label (decode the pattern) in order to solve the correspondence problem. The advantages and disadvantages of stereo vision against structured light and a survey on coded structured light are related and discussed. The work carried out in the frame of this thesis has permitted to present a new coded structured light pattern which solves the correspondence problem uniquely and robust. Unique, as each token of light is coded by a different word which removes the problem of multiple matching. Robust, since the pattern has been coded using the position of each token of light with respect to both co-ordinate axis. Algorithms and experimental results are included in the thesis. The reader can see examples 3D measurement of static objects, and the more complicated measurement of moving objects. The technique can be used in both cases as the pattern is coded by a single projection shot. Then it can be used in several applications of robot vision. Our interest is focused on the mathematical study of the camera and pattern projector models. We are also interested in how these models can be obtained by calibration, and how they can be used to obtained three dimensional information from two correspondence points. Furthermore, we have studied structured light and coded structured light, and we have presented a new coded structured light pattern. However, in this thesis we started from the assumption that the correspondence points could be well-segmented from the captured image. Computer vision constitutes a huge problem and a lot of work is being done at all levels of human vision modelling, starting from a)image acquisition; b) further image enhancement, filtering and processing, c) image segmentation which involves thresholding, thinning, contour detection, texture and colour analysis, and so on. The interest of this thesis starts in the next step, usually known as depth perception or 3D measurement.

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The objectives of the study were (a) to examine which information and design elements on dairy product packages operate as cues in consumer evaluations of product healthfulness, and (b) to measure the degree to which consumers voluntarily attend to these elements during product choice. Visual attention was measured by means of eye-tracking. Task (free viewing, product healthfulness evaluation, and purchase likelihood evaluation) and product (five different yoghurt products) were varied in a mixed within-between subjects design. The free viewing condition served as a baseline against which increases or decreases in attention during product healthfulness evaluation and purchase likelihood evaluation were assessed. The analysis revealed that the only element operating as a health cue during product healthfulness evaluation was the nutrition label. The information cues used during purchase likelihood evaluation were the name of the product category and the nutrition label. Taken together, the results suggest that the only information element that consumers consistently utilize as a health cue is the nutrition label and that only a limited amount of attention is devoted to read nutrition labels during purchase likelihood evaluations. The study also revealed that the probability that a consumer will read the nutrition label during the purchase decision process is associated with gender, body mass index and health motivation.

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Objetivo: A presente dissertação de mestrado teve como principal objetivo estudar a associação entre o suporte parental e dos pares na atividade física das crianças e adolescentes dos 10 aos 17 anos de idade. Método: Foi efetuada uma revisão sistemática de literatura (RSL) onde se sumarizou o estado da arte sobre a temática. Posteriormente foi realizado um estudo observacional transversal onde se investigou como o suporte dos pais (tangível e intangível) e dos pares estão associados com a atividade física entre crianças e adolescentes, examinando as diferenças entre géneros e a sua variação com a idade. Participaram no estudo 1876 crianças e adolescentes, de ambos os sexos, entre os 10 aos 17 anos de idade, participantes do projeto PESSOA. Resultados: Os resultados do estudo transversal corroboram os resultados de alguns estudos da revisão sistemática de literatura uma vez que, apesar das diferenças metodológicas entre os estudos, foram encontradas correlações significativas entre o suporte parental e o nível de atividade física das crianças e adolescentes. Há diferenças entre géneros no tipo de suporte parental e no suporte dos pares. O estudo transversal demonstrou uma associação positiva entre o suporte dos pares e a idade. Esta associação destaca-se na transição da infância para a adolescência. Em ambos os géneros, o suporte dos pares registou uma maior associação à atividade física do que o suporte dos pais. Conclusões: A realização deste estudo demonstra que os pais e os pares são fatores chave na atividade física das crianças e adolescentes. Em diferentes fases da infância e da adolescência, o papel de cada um deles altera-se de acordo com vários fatores do envolvimento físico e social. É necessário mais investigação nesta área, preferencialmente estudos longitudinais que permitam uma melhor compreensão de como as diferentes fontes (pais e pares) e os diferentes tipos de suporte (tangível e intangível) evoluem ao longo da infância e da adolescência e qual o seu impacto nos diferentes níveis de atividade física.

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The Dapperstreet[1] ...Anything is a lot, when you expect so little Life keeps its wonders hidden To suddenly reveal them in a divine state. I thought about all t Soaking wet, one drizzly morning, Simply happy in the Dapperstreet. The Dapperstreet is part of a neighbourhood often referred to as “East”, situated in the eastern part of Amsterdam. It is a lively and vibrant multi-cultural part of the city. It has a daily market with food from around the world, but is also known worldwide because of the murder on Theo van Gogh, the Dutch film director who was killed there in 2001 because of his critical and provocative statements on the Islam. Thus it can be concluded that it is certainly a neighbourhood with its own problems but, as can be read in Bloem’s poem, a place to call home and long for. [1] Poem by J.C. Bloem, The Dapperstreet (Het Verlangen, 1921). Translation by Davida de Hond.