El video clip popular de la tecnocumbia

Interesa aquí acercarnos a la comprensión de la apropiación del lenguaje del video clip, por la industria cultural de la tecnocumbia, industria al fin, pues goza de todos sus requisitos.

Poéticas y políticas del video indígena en el Ecuador

Este paper revisa críticamente los debates que se han realizado sobre el video indígena y los conceptos fundamentales que se han desarrollado para pensar su complejidad en miras a construir la noción de “prácticas audiovisuales indígenas” por fuera de las meta-narrativas de emancipación, concepciones binarias y esencialismos étnicos. En una primera parte realiza un balance de la trayectoria de los debates sobre video indígena que se han realizado en las últimas décadas, plantea una breve revisión histórica de los principales acontecimiento que llevaron del movimiento en el contexto latinoamericano, revisa críticamente un conceptos como “medios indígenas”, “medios ciudadanos”, “video comunitario”, “estéticas enraizadas”, “imagen-política”, finalmente analiza los enfoques disciplinarios e interdisciplinarios desarrollados dentro de los estudios antropológicos, comunicativos y culturales. En una segunda parte propone hacer un análisis de los procesos de resistencia cultural en el Ecuador dentro de los cuales se inscribe el video indígena. Posteriormente se plantea un estudio de la obra y el pensamiento Alberto Muenala y Amaru Cholango, dos artistas indígenas precursores en el uso del video en Ecuador que han influenciado a las nuevas generaciones. En una tercera parte, se retoma los dos casos de estudio para plantear una serie de críticas a las conceptualizaciones establecidas sobre video indígena y finalmente se establecen un conjunto de elementos para la reconceptualización de las prácticas audiovisuales indígenas.

La interactividad de las redes sociales en el video online. Estudios de casos: TerraTV (Brasil), CaracolTV (Colombia) y Ecuavisa (Ecuador)

El fulgor de las redes sociales, Facebook y Twitter, en el año 2013 ha llevado a múltiples análisis investigativos en estudios de comunicación a nivel de maestría; debido, en más de una forma, a las victorias conseguidas en el plano de la interactividad comunicativa sustentadas en los principios de libertad humana, propios de la democracia. Al reconocer al sujeto como decidor, hablamos de la libertad para seleccionar, pertenecer, y participar, formando redes de afiliación y amistad basadas en las conexiones físicas. Así, busco conocer cuál es el grado de interactividad de las redes sociales en la difusión del video online. El inicio de la comunicación moderna impulsada por la prensa bajo un formato de oferta de información derivó en la aplicación de prácticas comunicacionales semejantes en el medio televisivo, pero cuando los medios iniciaron la producción de contenidos en la web, la lógica del emisor-canal-receptor se transformó hacia una bidireccionalidad múltiple. En este punto, a partir de un método cuantitativo, cuestiono el establecimiento de un diálogo con el usuario y entre usuarios generado por las publicaciones en Facebook y Twitter de cibermedios como TerraTV, CaracolTV y Ecuavisa, identificados por la distribución de contenido en formato de video on demand con carácter noticioso. Con el posicionamiento de internet en la esfera mediática la formación de las redes humanas físicas se virtualizaron, haciendo que cada uno de los nodos de la sociedad red ofrezca sus dosis de innovación al sistema, agregando valor e impulsando el capital social. Likes, fan pages, share, tuits, comentarios y clicks han llevado a todos los medios de comunicación a mantener conexiones con las redes sociales. En el caso de Ecuador, indago si Ecuavisa está empleando todas las potencialidades ofrecidas por la arquitectura de Facebook y Twitter para desarrollar una conversación entre sus fans. Con estudios de casos de 182 post y tuits producidos en Facebook y Twitter por los cibermedios seleccionados durante la elección del papa en marzo 2013, se compara el grado de adecuación a la interactividad en la difusión del video online, tras la implementación de un modelo de medición adaptado al test de dinamismo. CaracolTV se configura, entre los representantes de Brasil, Colombia y Ecuador, como el cibermedio con mayor grado de interactividad en una escala de 70 puntos.

Innovative use of vodcast (Video-Podcast) to enrich learning experience in structures laboratory

Students may have difficulty in understanding some of the complex concepts which they have been taught in the general areas of science and engineering. Whilst practical work such as a laboratory based examination of the performance of structures has an important role in knowledge construction this does have some limitations. Blended learning supports different learning styles, hence further benefits knowledge building. This research involves an empirical study of how vodcasts (video-podcasts) can be used to enrich learning experience in the structural properties of materials laboratory of an undergraduate course. Students were given the opportunity of downloading and viewing the vodcasts on the theory before and after the experimental work. It is the choice of the students when (before or after, before and after) and how many times they would like to view the vodcasts. In blended learning, the combination of face-to-face teaching, vodcasts, printed materials, practical experiments, writing reports and instructors’ feedbacks benefits different learning styles of the learners. For the preparation of the practical, the students were informed about the availability of the vodcasts prior to the practical session. After the practical work, students submitted an individual laboratory report for the assessment of the structures laboratory. The data collection consisted of a questionnaire completed by the students, follow-up semi-structured interviews and the practical reports submitted by them for assessment. The results from the questionnaire were analysed quantitatively, whilst the data from the assessment reports were analysed qualitatively. The analysis shows that most of the students who have not fully grasped the theory after the practical, managed to gain the required knowledge by viewing the vodcasts. According to their feedbacks, the students felt that they have control over how to use the material and to view it as many times as they wish. Some students who have understood the theory may choose to view it once or not at all. Their understanding was demonstrated by their explanations in their reports, and was illustrated by the approach they took to explicate the results of their experimental work. The research findings are valuable to instructors who design, develop and deliver different types of blended learning, and are beneficial to learners who try different blended approaches. Recommendations were made on the role of the innovative application of vodcasts in the knowledge construction for structures laboratory and to guide future work in this area of research.

Blended learning approach to include the innovative use of vodcasts (video-podcasts) to enrich students learning experience in structures laboratory

Students may have difficulty in understanding some of the complex concepts which they have been taught in the general areas of science and engineering. Whilst practical work such as a laboratory based examination of the performance of structures has an important role in knowledge construction this does have some limitations. Blended learning supports different learning styles, hence further benefits knowledge building. This research involves the empirical studies of how an innovative use of vodcasts (video-podcasts) can enrich learning experience in the structural properties of materials laboratory of an undergraduate course. Students were given the opportunity of downloading and viewing the vodcasts on the theory before and after the experimental work. It is the choice of the students when (before or after, before and after) and how many times they would like to view the vodcasts. In blended learning, the combination of face-to-face teaching, vodcasts, printed materials, practical experiments, writing reports and instructors’ feedbacks benefits different learning styles of the learners. For the preparation of the practical laboratory work, the students were informed about the availability of the vodcasts prior to the practical session. After the practical work, students submit an individual laboratory report for the assessment of the structures laboratory. The data collection consists of a questionnaire completed by the students, and the practical reports submitted by them for assessment. The results from the questionnaire were analysed quantitatively, whilst the data from the assessment reports were analysed qualitatively. The analysis shows that students who have not fully grasped the theory after the practical were successful in gaining the required knowledge by viewing the vodcasts. Some students who have understood the theory may choose to view it once or not at all. Their understanding was demonstrated by the quality of their explanations in their reports. This is illustrated by the approach they took to explicate the results of their experimental work, for example, they can explain how to calculate the Young’s Modulus properly and provided the correct value for it. The research findings are valuable to instructors who design, develop and deliver different types of blended learning, and beneficial to learners who try different blended approaches. Recommendations were made on the role of the innovative application of vodcasts in the knowledge construction for structures laboratory and to guide future work in this area of research.

Investment in preventing and preparing for biological emergencies and disasters: social and economic costs of disasters versus costs of surveillance and response preparedness

Biological emergencies such as the appearance of an exotic transboundary or emerging disease can become disasters. The question that faces Veterinary Services in developing countries is how to balance resources dedicated to active insurance measures, such as border control, surveillance, working with the governments of developing countries, and investing in improving veterinary knowledge and tools, with passive measures, such as contingency funds and vaccine banks. There is strong evidence that the animal health situation in developed countries has improved and is relatively stable. In addition, through trade with other countries, developing countries are becoming part of the international animal health system, the status of which is improving, though with occasional setbacks. However, despite these improvements, the risk of a possible biological disaster still remains, and has increased in recent times because of the threat of bioterrorism. This paper suggests that a model that combines decision tree analysis with epidemiology is required to identify critical points in food chains that should be strengthened to reduce the risk of emergencies and prevent emergencies from becoming disasters.

Application of one-list capture-recapture models to scrapie surveillance data in Great Britain

In this paper, we apply one-list capture-recapture models to estimate the number of scrapie-affected holdings in Great Britain. We applied this technique to the Compulsory Scrapie Flocks Scheme dataset where cases from all the surveillance sources monitoring the presence of scrapie in Great Britain, the abattoir survey, the fallen stock survey and the statutory reporting of clinical cases, are gathered. Consequently, the estimates of prevalence obtained from this scheme should be comprehensive and cover all the different presentations of the disease captured individually by the surveillance sources. Two estimators were applied under the one-list approach: the Zelterman estimator and Chao's lower bound estimator. Our results could only inform with confidence the scrapie-affected holding population with clinical disease; this moved around the figure of 350 holdings in Great Britain for the period under study, April 2005-April 2006. Our models allowed the stratification by surveillance source and the input of covariate information, holding size and country of origin. None of the covariates appear to inform the model significantly. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.

A comparison of the active surveillance of scrapie in the European Union

The abattoir and the fallen stock surveys constitute the active surveillance component aimed at improving the detection of scrapie across the European Union. Previous studies have suggested the occurrence of significant differences in the operation of the surveys across the EU. In the present study we assessed the standardisation of the surveys throughout time across the EU and identified clusters of countries with similar underlying characteristics allowing comparisons between them. In the absence of sufficient covariate information to explain the observed variability across countries, we modelled the unobserved heterogeneity by means of non-parametric distributions on the risk ratios of the fallen stock over the abattoir survey. More specifically, we used the profile likelihood method on 2003, 2004 and 2005 active surveillance data for 18 European countries on classical scrapie, and on 2004 and 2005 data for atypical scrapie separately. We extended our analyses to include the limited covariate information available, more specifically, the proportion of the adult sheep population sampled by the fallen stock survey every year. Our results show that the between-country heterogeneity dropped in 2004 and 2005 relative to that of 2003 for classical scrapie. As a consequence, the number of clusters in the last two years was also reduced indicating the gradual standardisation of the surveillance efforts across the EU. The crude analyses of the atypical data grouped all the countries in one cluster and showed non-significant gain in the detection of this type of scrapie by any of the two sources. The proportion of the population sampled by the fallen stock appeared significantly associated with our risk ratio for both types of scrapie, although in opposite directions: negative for classical and positive for atypical. The initial justification for the fallen stock, targeting a high-risk population to increase the likelihood of case finding, appears compromised for both types of scrapie in some countries.

Modeling cumulative evidence for freedom from disease with applications to BSE surveillance trials

This investigation deals with the question of when a particular population can be considered to be disease-free. The motivation is the case of BSE where specific birth cohorts may present distinct disease-free subpopulations. The specific objective is to develop a statistical approach suitable for documenting freedom of disease, in particular, freedom from BSE in birth cohorts. The approach is based upon a geometric waiting time distribution for the occurrence of positive surveillance results and formalizes the relationship between design prevalence, cumulative sample size and statistical power. The simple geometric waiting time model is further modified to account for the diagnostic sensitivity and specificity associated with the detection of disease. This is exemplified for BSE using two different models for the diagnostic sensitivity. The model is furthermore modified in such a way that a set of different values for the design prevalence in the surveillance streams can be accommodated (prevalence heterogeneity) and a general expression for the power function is developed. For illustration, numerical results for BSE suggest that currently (data status September 2004) a birth cohort of Danish cattle born after March 1999 is free from BSE with probability (power) of 0.8746 or 0.8509, depending on the choice of a model for the diagnostic sensitivity.

Group stochastic search for object detection and tracking

A technique is presented for locating and tracking objects in cluttered environments. Agents are randomly distributed across the image, and subsequently grouped around targets. Each agent uses a weightless neural network and a histogram intersection technique to score its location. The system has been used to locate and track a head in 320x240 resolution video at up to 15fps.