Analyzing First-Person Stories Based on Socializing, Eating and Sedentary Patterns

First-person stories can be analyzed by means of egocentric pictures acquired throughout the whole active day with wearable cameras. This manuscript presents an egocentric dataset with more than 45,000 pictures from four people in different environments such as working or studying. All the images were manually labeled to identify three patterns of interest regarding people's lifestyle: socializing, eating and sedentary. Additionally, two different approaches are proposed to classify egocentric images into one of the 12 target categories defined to characterize these three patterns. The approaches are based on machine learning and deep learning techniques, including traditional classifiers and state-of-art convolutional neural networks. The experimental results obtained when applying these methods to the egocentric dataset demonstrated their adequacy for the problem at hand.Comment: Accepted at First International Workshop on Social Signal Processing and Beyond, 19th International Conference on Image Analysis and Processing (ICIAP), September 201

Control visual embebido en dispositivo FPGA

El objetivo principal del siguiente proyecto es el diseño e implementación de un controlador visual basado en imagen clásico, embebido en un dispositivo reconfigurable FPGA. Se partirá de un sistema programado sobre la FPGA capaz de procesar una imagen capturada por la cámara. A partir de ésta imagen se obtiene la posición en imagen de los puntos característicos que se emplean para obtener el error del control visual. La principal aportación de este proyecto será la paralelización del algoritmo de control visual para poder programarlo en la FPGA, de forma que se puedan realizar tareas de control visual embebido

The Hotelling's Rule Revisited in a Dynamic General Equilibrium Model

The validity of the Hotelling?s rule, the fundamental theorem of nonrenewable resource eco- nomics, is limited by its partial equilibrium nature. One symptom of this limitation may be the disagreement between the empirical evidence, showing stable or declining resource prices, and the rule, predicting exponentially increasing prices. In this paper, we study the optimal depletion of a nonrenewable resource in a dynamic general equilibrium framework.We show that in, the long run, the price of a nonrenewable (i) is constant when the nonrenewable is essential in production, and (ii) it increases only if the rate of return of capital is larger than the capital depreciation rate and if the non-renewable is an inessential input in production. We believe that our model offers a theoretical explanation to non-growing nonrenewable prices and hence at least partially solves the paradox between the Hotelling's rule and the empirical regularities. We also show that two factors play a crucial role in determining the long run behavior of non-renewable prices, namely the elasticity of substitution between input factors, and the long run behavior of the real interest rate. Another major achievement of this study is the full analytical solution of the model under a Cobb-Douglas technology.Nonrenewable resources; One-sector growth model, Hotelling?s Rule, Sustainability

Inmigrant homelessness. A case of university action-research in the context of the olive harvest in Úbeda

Cuando la inmigración deriva en sinhogarismo se crea un fenómeno de profunda exclusión social que afecta a escala individual, relacional y estructural. Uno de los contextos en los que se observa el sinhogarismo inmigrante es el agrícola, en las campañas anuales donde se requiere mano de obra de temporeros. Este documento aborda una experiencia de investigación-acción que implica a inmigrantes, población autóctona y universidad, en torno a la recogida de la aceituna en Úbeda, municipio de la provincia de Jaén, en España. Se muestran los resultados de varios grupos focales, realizados con inmigrantes, población local, profesorado, estudiantes y personal de administración y servicios de un centro universitario. Los resultados refuerzan la necesidad de una intervención urgente y compleja, pues no solo se describe una situación de profundo desamparo estructural, sino que también se identifican varios agentes implicados en el fenómeno, todos ellos insertos en procesos globales con repercusiones locales. En medio de todo ello, la universidad debe jugar un papel fundamental, basado en su condición de institución que genera conocimiento relevante.When immigration results in homelessness, a phenomenon of deep social exclusion is created, with effects in individual, relational and structural scales. One of the contexts in which immigrant homelessness is observed is the agricultural one, in the annual campaigns where labor of temporary workers is required. This document addresses a research-action experience involving immigrants, local people and university, around the harvest of oil in Úbeda, municipality of the province of Jaén, in Spain. The results of several focus groups are shown, accomplished with immigrants, local population, teachers, students and administration and services staff of a university center. The results reinforce the need for urgent and complex intervention, not only describing a situation of profound structural helplessness, but also identifying several agents involved in the phenomenon, all of them inserted in global processes with local repercussions. In the midst of all this, the university must play a fundamental role, based on its status as an institution that generates relevant knowledge

Vector-borne disease risk indexes in spatially structured populations

There are economic and physical limitations when applying prevention and control strategies for urban vector borne diseases. Consequently, there are increasing concerns and interest in designing efficient strategies and regulations that health agencies can follow in order to reduce the imminent impact of viruses like Dengue, Zika and Chikungunya. That includes fumigation, abatization, reducing the hatcheries, picking up trash, information campaigns. A basic question that arise when designing control strategies is about which and where these ones should focus. In other words, one would like to know whether preventing the contagion or decrease vector population, and in which area of the city, is more efficient. In this work, we propose risk indexes based on the idea of secondary cases from patch to patch. Thus, they take into account human mobility and indicate which patch has more chance to be a corridor for the spread of the disease and which is more vulnerable. They can also indicate the neighborhood where hatchery control will reduce more the number of potential cases. In order to illustrate the usefulness of these indexes, we run a set of numerical simulations in a mathematical model that takes into account the urban mobility and the differences in population density among the areas of a city. If i is a particular neighborhood, the transmission risk index TR_i measures the potential secondary cases caused by a host in that neighborhood. The vector transmission risk index VTR_i measures the potential secondary cases caused by a vector. Finally, the vulnerability risk index VR_i measures the potential secondary cases in the neighborhood. Transmission indexes can be used to give geographical priority to some neighborhoods when applying prevention and control measures. On the other hand, the vulnerability index can be useful to implement monitoring campaigns or public health investment.Comment: 16 pages, 5 figure

UVE de Gowin instrumento metacognitivo para un aprendizaje significativo basado en competencias

El present treball té com a objectiu descriure l'eina metacognitiva i heurística anomenada V de Gowin, desenvolupada a la llum de la teoria d'Ausubel, Novak i Gowin en la resolució de problemes, anàlisi del currículum, avaluació, anàlisi crítica de treballs d’investigació, informes de pràctiques de laboratori de còmput, entre altres més. Es presenten la metodologia i els resultats obtinguts quan s’ha implementat en assignatures d'anàlisi i disseny dels algorismes, en la carrera d'Enginyeria en Computació a l'Institut Politècnic Nacional. La necessitat d'implementar-la per donar suport a l'estudiant en el seu aprenentatge significatiu i la millora del rendiment acadèmic, que redunda a abatre la problemàtica de reprovació i la deserció escolar que causen un efecte negatiu en diversos àmbits socials i econòmics, i anar més enllà en guiar els estudiants cap a un aprenentatge basat en competències.El presente trabajo tiene como objetivo describir la herramienta metacognitiva y heurística denominada UVE de Gowin, desarrollada a la luz de la teoría de Ausubel, Novak y Gowin en la en resolución de problemas, análisis del currículo, evaluación, análisis crítico de trabajos de investigación, reportes de prácticas de laboratorio de cómputo entre otras más. Se presentan la metodología y resultados obtenidos al implementarla en asignaturas de análisis y diseño de los algoritmos, en la carrera de ingeniería en computación en el Instituto Politécnico Nacional. La necesidad de implementarla para apoyar al estudiante en su aprendizaje significativo y el mejoramiento del rendimiento académico que redunda en abatir la problemática de reprobación y la deserción escolar que causan un efecto negativo en diversos ámbitos sociales y económicos e ir más allá al guiarlos hacia un aprendizaje basado en competencia

THE VIRTUAL LABORATORY IN THE ANALYSIS OF ALGORITHMS AS DIDACTIC STRATEGY

The objective of the present work was to apply a methodology in the teaching of the Techniques of Design and Analysis of Computational Algorithms, for the construction of optimal algorithms in the solution of problems. The methodology followed in the investigation began with the construction and selection of measurement tools. The subject of the Techniques of Design and Analysis of Computational Algorithms in Computer Science is very important, since they are a tool for the optimal and effective solution in the solution of problems through the design of computer algorithms, being necessary to investigate what ideas students have or preconceived ideas through diagnostic tests. This document first describes the methodology followed and the results obtained when applied through the virtual material implemented with Gowin's UVE and the conceptual maps (MMCC) to achieve significant learning in the topic of algorithm analysis. The data recorded at the beginning, during and at the end of the course were analyzed qualitatively and quantitatively in a comparative manner. This research was carried out in the School of Mechanical and Electrical Engineering of the Culhuacán Unit of the National Polytechnic Institute of Mexico in the course of the analysis of algorithms of the fifth semester of