Least Squares Regression Principal Component Analysis

Dimension reduction is an important technique in surrogate modeling and machine learning. In this thesis, we present three existing dimension reduction methods in detail and then we propose a novel supervised dimension reduction method, `Least Squares Regression Principal Component Analysis" (LSR-PCA), applicable to both classification and regression dimension reduction tasks. To show the efficacy of this method, we present different examples in visualization, classification and regression problems, comparing it to state-of-the-art dimension reduction methods. Furthermore, we present the kernel version of LSR-PCA for problems where the input are correlated non-linearly. The examples demonstrated that LSR-PCA can be a competitive dimension reduction method.La reducción de dimensiones es una técnica importante en el modelado de sustitución y el aprendizaje automático. En esta tesis, presentamos en detalle los tres métodos de reducción de dimensiones existentes y proponemos un novedoso método supervisado de reducción de dimensiones, el "Least Squares Regression Principal Component Analysis" (LSR-PCA), aplicable tanto a las tareas de clasificación como a las de reducción de dimensiones de regresión. Para demostrar la eficacia de este método, presentamos diferentes ejemplos de problemas de visualización, clasificación y regresión, comparándolo con los métodos más avanzados de reducción de dimensiones. Además, presentamos la versión del núcleo de LSR-PCA para problemas en los que las entradas están correlacionadas de forma no lineal. Los ejemplos demostraron que LSR-PCA puede ser un método competitivo de reducción de dimensiones.Reducció de dimensions és una tècnica important dins del Machine-Learning. En aquesta tesi, presentem tres mètodes existents de reducció de dimensions en detall i llavors proposem un nou mètode supervisat de reducció de dimensions, "Least Squares Regression Principal Component Analysis" (LSR-PCA), aplicable a tant a tasques de classificació com a tasques de regressió. Per mostrar l'eficàcia d'aquest mètode, presentem exemples diferents en visualització, classificació i problemes de regressió, comparant-la a mètodes de dimensió de reducció moderns. A més, presentem la versió de nucli de LSR-PCA per a problemes on l'entrada és correlacionada no-linearment. Els exemples han demostrat que LSR-PCA pot ser un mètode de reducció de dimensions competitiu

Adaptive Robot Framework: Providing Versatility and Autonomy to Manufacturing Robots Through FSM, Skills and Agents

207 p.The main conclusions that can be extracted from an analysis of the current situation and future trends of the industry,in particular manufacturing plants, are the following: there is a growing need to provide customization of products, ahigh variation of production volumes and a downward trend in the availability of skilled operators due to the ageingof the population. Adapting to this new scenario is a challenge for companies, especially small and medium-sizedenterprises (SMEs) that are suffering first-hand how their specialization is turning against them.The objective of this work is to provide a tool that can serve as a basis to face these challenges in an effective way.Therefore the presented framework, thanks to its modular architecture, allows focusing on the different needs of eachparticular company and offers the possibility of scaling the system for future requirements. The presented platform isdivided into three layers, namely: interface with robot systems, the execution engine and the application developmentlayer.Taking advantage of the provided ecosystem by this framework, different modules have been developed in order toface the mentioned challenges of the industry. On the one hand, to address the need of product customization, theintegration of tools that increase the versatility of the cell are proposed. An example of such tools is skill basedprogramming. By applying this technique a process can be intuitively adapted to the variations or customizations thateach product requires. The use of skills favours the reuse and generalization of developed robot programs.Regarding the variation of the production volumes, a system which permits a greater mobility and a faster reconfigurationis necessary. If in a certain situation a line has a production peak, mechanisms for balancing the loadwith a reasonable cost are required. In this respect, the architecture allows an easy integration of different roboticsystems, actuators, sensors, etc. In addition, thanks to the developed calibration and set-up techniques, the system canbe adapted to new workspaces at an effective time/cost.With respect to the third mentioned topic, an agent-based monitoring system is proposed. This module opens up amultitude of possibilities for the integration of auxiliary modules of protection and security for collaboration andinteraction between people and robots, something that will be necessary in the not so distant future.For demonstrating the advantages and adaptability improvement of the developed framework, a series of real usecases have been presented. In each of them different problematic has been resolved using developed skills,demonstrating how are adapted easily to the different casuistic

Impacto del cambio de regulación sobre las instalaciones fotovoltaicas

La energía eléctrica es una fuente de energía renovable que se obtiene a través del movimiento de cargas eléctricas (electrones positivos y negativos) producidas en el interior de materiales conductores. El fenómeno de la electricidad en sí no tiene historia. No podemos fijar un origen para ello, salvo por su relación con el ser humano. Una de las teorías que existen es que, por el año 600 a.C., el filósofo Tales de Mileto observó que frotando una varilla de ámbar con una lana o piel se obtenían pequeñas cargas que atraían objetos de tamaño reducido. Y si frotaba mucho tiempo, lograba aparecer una chispa. La electricidad fue evolucionando desde la simple percepción del fenómeno hasta su tratamiento científico. Con la notable excepción del uso del magnetismo de la brújula, hasta la revolución científica del siglo XVII su tratamiento se basó en especulaciones y en registros fragmentarios. A partir de entonces, numerosos físicos y matemáticos estudiaron y avanzaron en la comprensión de la electricidad. Las dudas acerca de su naturaleza eran cada vez mayores y su interés por cómo explotarla crecía con cada descubrimiento. Hubo que esperar hasta finales del siglo XIX para que las aplicaciones económicas de la electricidad la convirtieran en una de las fuerzas motrices de la segunda revolución industrial, dando paso a los ingenieros.Ingeniería Eléctric

Actividad Física y Alimentación en Educación Primaria

En la actualidad, existe en España un alto nivel de obesidad, además de un sedentarismo que acentúa la gravedad del sobrepeso en las edades comprendidas entre 6-12 años. Este problema presenta una preocupación a nivel social e institucional debido a las posibles complicaciones que esto puede provocar, además de los riesgos para la salud. Estos problemas de sobrepeso y sedentarismo vienen precedidos por los malos hábitos, tanto alimenticios como a nivel físico de los niños junto a estilos de vida inadecuados o poco saludables. Con la finalidad de afrontar esta situación, la Agencia Española de Seguridad Alimentaria y Nutrición, pretende promover una buena salud y prevenir de esta manera la obesidad mediante la Estrategia NAOS y el programa PERSEO, ambos a nivel nacional. Además del Programa Thao, de ámbito privado, que trabaja con algunos ayuntamientos de diferentes municipios como en el que nos vamos a centrar en este caso, el ayuntamiento de Palencia.Grado en Educación Primari

Adaptive Robot Framework: Providing Versatility and Autonomy to Manufacturing Robots Through FSM, Skills and Agents

207 p.The main conclusions that can be extracted from an analysis of the current situation and future trends of the industry,in particular manufacturing plants, are the following: there is a growing need to provide customization of products, ahigh variation of production volumes and a downward trend in the availability of skilled operators due to the ageingof the population. Adapting to this new scenario is a challenge for companies, especially small and medium-sizedenterprises (SMEs) that are suffering first-hand how their specialization is turning against them.The objective of this work is to provide a tool that can serve as a basis to face these challenges in an effective way.Therefore the presented framework, thanks to its modular architecture, allows focusing on the different needs of eachparticular company and offers the possibility of scaling the system for future requirements. The presented platform isdivided into three layers, namely: interface with robot systems, the execution engine and the application developmentlayer.Taking advantage of the provided ecosystem by this framework, different modules have been developed in order toface the mentioned challenges of the industry. On the one hand, to address the need of product customization, theintegration of tools that increase the versatility of the cell are proposed. An example of such tools is skill basedprogramming. By applying this technique a process can be intuitively adapted to the variations or customizations thateach product requires. The use of skills favours the reuse and generalization of developed robot programs.Regarding the variation of the production volumes, a system which permits a greater mobility and a faster reconfigurationis necessary. If in a certain situation a line has a production peak, mechanisms for balancing the loadwith a reasonable cost are required. In this respect, the architecture allows an easy integration of different roboticsystems, actuators, sensors, etc. In addition, thanks to the developed calibration and set-up techniques, the system canbe adapted to new workspaces at an effective time/cost.With respect to the third mentioned topic, an agent-based monitoring system is proposed. This module opens up amultitude of possibilities for the integration of auxiliary modules of protection and security for collaboration andinteraction between people and robots, something that will be necessary in the not so distant future.For demonstrating the advantages and adaptability improvement of the developed framework, a series of real usecases have been presented. In each of them different problematic has been resolved using developed skills,demonstrating how are adapted easily to the different casuistic

Probing and manipulating graphene physics at the atomic level

Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Física de la Materia Condensada. Fecha de lectura: 26-01-201

El ingreso de los docentes en la Argentina: ¿es alto o bajo?

Relative income of teachers is analyzed in Argentina. A Mincerian income equation is estimated for a cross section sample of individuals from 1998 Permanent Household Survey (EPH) over twenty-nine metropolitan areas and a Oaxaca decomposition procedure is followed to ascertain whether characteristics or returns explain better the log mean difference in income of teachers and other relevant groups used for comparison. Hourly income of teachers are found to be higher than the average for the economy, slightly lower than that of workers with post-secondary studies, but lower definite respective of professionals. Characteristics is a critical source of teacher-non-teacher income differential. Its relative weight changes according to the group of comparison chosen. Substracting the effect of characteristics, income difference is reduced by 40 % in the total population, 16% in the post-secondary population but has the reverse effect of penalizing teachers vs professionals.Mincer equation, relative income of teachers, Oaxaca decomposition

Social Consciousness and Perceived Risk as Drivers of Crowdfunding as a Socially Responsible Investment in Tourism

This article is a first step in examining reward-based crowdfunding in tourism as a socially responsible nvestment where individuals collaborate with projects that contribute to the development of their communities in economic, environmental, and/or sociocultural terms. Thus, the present study develops a model where social consciousness and perceived risk are postulated to influence individuals' attitudes toward and intentions to participate in a project of crowdfunding. Based on a simulated crowdfunding project of "enotourism" that contributes to the development of a region in Spain, results reflect that the main drivers of individuals' overall attitude toward crowdfunding are social consciousness and platform risk. Additionally, individuals' intentions to fund the tourism project are influenced by their specific attitude toward the project and their overall attitude toward crowdfunding

La recepción alberdiana en la política educativa de los gobiernos de Julio Argentino Roca

ResumenNuestro propósito es evidenciar que, en las dos últimas décadas del siglo XIX,Roca encuentra ciertas voces, en los ministros de instrucción pública y en el normalismo, que aceptan algunas premisas básicas de las ideas educativas de Alberdi, pero no comparten el programa de la república del habitante productor de riqueza, sino que inscriben su propuesta educativa en un programa de república de ciudadanos que pondría &n a la república posible. Esto explicaría dos cuestiones centrales para nuestra exploración: primero por qué en 1900 puede debatirse, por primera vez en el congreso de la nación, un proyecto de educación asociado al trabajo, y segundo, por qué se lo rechaza. A nuestro juicio, los actores que participan de este debate educativo y que se oponen a la república posible, se han formado antes de 1900, y sobre este aspecto trata el presente artículo

How online search behavior is influenced by user-generated content on review websites and hotel interactive websites

ABSTRACT: Purpose – The purpose of this paper is to advance in research on consumer Psychology of hospitality, since it investigates how online search behavior of users (particularly, information search and choice) is influenced by the opinions of other people in a new context characterized by the generalized use of Web 2.0 applications. Design/methodology/approach – Empirical research was carried out in the hotel sector in Iberian Peninsula, where two Web 2.0 applications are especially relevant for users: the review Web sites and the hotel interactive Web sites. A qualitative method (in-depth interviews with hotel managers) and a quantitative technique (personal surveys to a sample of 830 users) were used to conduct this research. Findings – The results indicates that the perceived influence on behavior of the user-generated content on these Web 2.0 applications is determined, in both cases, by the value of the information, the credibility of the sources and the degree of similarity between the user and the creators of content. Practical implications – Firms should have an active presence in the review Web sites and the hotel interactive Web sites, and use these platforms for market research and communication. Firms should engage users to post content, support their credibility and facilitate the evaluation of the content generators’ similarity. Originality/value – This paper is the first study in the hospitality literature that develops and empirically tests an integrative model explaining the perceived influence on behavior of user-generated content on Web 2.0 applications