Towards a new curriculum design: The role of the process variables and their alteration

A comienzos de los ochenta toda una línea de investigación se pone en marcha con una idea central: romper el tradicional abismo existente entre teoría pedagógica y praxis escolar. Los estudios del Mesa Seminar de Chicago de 1980 con Bloom a la cabeza abanderan esta dirección que encuentra terreno abonado en realizaciones paralelas tales como la investigación-acción o el interés por la evaluación procesual-cualitativa. Se toma conciencia de que existen variables curriculares -repetidamente constatadas, definidas y estudiadas que son inamovibles por la escuela, tal es el caso del nivel de ingresos de los padres. Al mismo tiempo se reconoce que existen variables de proceso que pueden y deben ser alteradas, con objeto de optimizar el proceso de enseñanza-aprendizaje. Este trabajo se inscribe en esa línea voluntarista de acercamiento entre teoría educativa y praxis escolar, de intervención sobre esas variables archiconstatadas a lo largo de las tres últimas décadas.At the beginning of the eighties a line of research was initiated whit one central idea; to break the traditional abysm between pedagogical theory and classroom practice. The studies of the Chicago Seminar of 1980 with Bloom at the head, marked out this direction which found fertile soil in parallel activities such as action research or the interest in process-qualitative evaluation. It was realized that there exist curriculum variables-repeatedly confirmed, defined and studied-which are immovable for the school, as for example the income level of the parents. At the same time it was recognized that there exist process variables which can and agility to be alert whit the aim of getting the best oút of the teaching/learning process. This work follows the line of drawing together educational theory and school practice, of intervention over these variables constantly confirmed throughout the last three decades.peerReviewe

Poly-Harmonic Distortion Model Extraction in Charge-Controlled One-Port Devices

A charge-controlled, one-port device is used to describe and discuss the extraction procedure of a Poly-Harmonic Distortion (PHD) model in detail. For this case, both voltage and current waveforms are shown to be enough to fully characterize the PHD model. It is also shown that all the information specifically required for this PHD model definition can be stored in the Fourier coefficients of the incremental conductance and capacitance. The results are validated by comparing them with those obtained using a commercial circuit simulation tool.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Programas de desarrollo dirigidos a agricultoras : identificando clústeres para el caso del programa "Formación y capacitación para mujeres campesinas" de Chile

This article aims to contribute to the evaluation of development policies for female farmers based on their beneficiaries attitudes. For this, it was conducted a survey in the Metropolitan Region of Santiago, Chile, to a representative sample of participants in the "Education and training program for rural women" of the Chilean National Institute for Agricultural Development. The questionnaire applied was divided into the following sections: i) personal characteristics of the farmers and their family unit; ii) technical, productive and commercial features; iii) farm and household income; and iv) vision of themselves and program-related attitudes. The data collected was processed by descriptive and multivariate techniques such as principal components and cluster analysis. The results show a positive assessment of the program on an aggregate level, although there are significant dissimilarities within the sample, allowing three clusters to be identified: "reticent participants" (42.3%), "associative participants" (20.5%) and "empowered participants" (37.2%). The farmers on those clusters present differences not only in their attitudes towards the program but also in their education level, income, farm profitability and balance between productive and domestic roles. Its concluded that individual characteristics and circumstances impact beneficiaries perception of the programs, which should be considered in their design and implementation.Este artículo tiene como propósito contribuir a la evaluación de las políticas de desarrollo dirigidas a mujeres campesinas, considerando en este sentido las actitudes de sus propias beneficiarias. Para ello, se aplicó una encuesta en la Región Metropolitana de Santiago, Chile, a una muestra representativa de participantes del programa "Formación y Capacitación para mujeres campesinas" del Instituto Nacional de Desarrollo Agropecuario. El cuestionario utilizado se dividió en las siguientes secciones: i) características personales de las productoras y de sus unidades familiares; ii) rasgos técnicos, productivos y comerciales; iii) ingreso predial y familiar; y iv) visión respecto de ellas mismas; así como actitudes frente al programa. La información levantada se procesó mediante técnicas descriptivas y multivariantes, como componentes principales y análisis de conglomerados. Los resultados obtenidos muestran una valoración positiva del programa a nivel agregado, sin embargo con diferencias significativas entre las encuestadas, permitiendo identificar tres grupos: "participantes reticentes" (42,3%), "participantes asociativas" (20,5%) y "participantes empoderadas" (37,2%). Las agricultoras en cada grupo divergen no solo en sus actitudes respecto del programa, sino también en su nivel educacional, ingreso, rentabilidad de sus negocios y relación entre los roles productivo y doméstico. Se concluye que las características y circunstancias individuales impactan en la percepción que las beneficiarias tienen sobre los programas, lo que debe ser considerado en su diseño y ejecución.Fil: Boza, Sofía. Universidad de Chile. Facultad de Ciencias Agronómicas.Fil: Muñoz, Tomás. Universidad de Chile. Facultad de Ciencias Agronómicas.Fil: Rico, Margarita. Universidad de Valladolid (España)Fil: Muñoz, Jazmín. Universidad de Chile. Facultad de Ciencias Agronómicas

Methanol dehydration on carbon-based acid catalysts

Methanol dehydration to produce dimethyl ether (DME) is an interesting process for the chemical industry since DME is an important intermediate and a promising clean alternative fuel for diesel engines. Pure or modified γ-aluminas (γ-Al2O3) and zeolites are often used as catalysts for this reaction. However, these materials usually yield non desirable hydrocarbons and undergo fast deactivation. In this work, we study the catalytic conversion of methanol over an acid carbon catalyst obtained by chemical activation of olive stone with H3PO4. A significant amount of phosphorus remains over the catalyst surface after the activation process, mostly in form of C-O-PO3 and C-PO3 groups, which provide the carbon a relatively high surface acidity and oxidation resistance. Methanol decomposition on this catalyst yields selectivities to DME higher than 82% at 623K and methanol conversion of 34%, under the operating conditions studied. The activated carbon catalytic activity and stability, under inert and oxidant atmospheres, as well as different regeneration procedures, were studied. In the absence of oxygen, the catalyst suffers a progressive deactivation by coke deposition on the active acid sites (Fig. 1). The presence of oxygen modifies the carbon surface chemistry, probably through oxygen spillover on the catalyst surface, where the availability of labile oxygen avoids catalyst deactivation. A reaction mechanism has been proposed where methanol dehydration seems to proceed through an Eley-Rideal mechanism, which assumes the adsorption of water and oxygen spillover on the acid active sites, avoiding coke deposition

Perfomance analysis of hybrid systems based on externally heayed closed-cycle engines

This work presents a comparative analysis of hybrid systems that make use of closed-cycle externally heated bottoming systems. Two options are considered: reciprocating (Stirling) engines and supercritical carbon dioxide turbines. These engines share the common feature of working on closed cycles with optimised fluids (H2 and CO2 respectively). However, they differ in their internal structure: Stirling engines make use of volumetric machinery whereas the SCO2 system is composed by turbomachinery. In both cases, the working fluid is subjected to very high pressure and temperature in the range of 50-200 bar and 40-650 ºC. A brief description of both bottoming systems is provided in the article along with the expected performance of each case in on-design and off-design (part load) conditions. The analysis is therefore split into two stages. First, a comparison is shown for on-design operation aiming to evaluate the maximum efficiency attainable by the proposed systems. Second, a preliminary analysis of off-design operation is presented. The paper concludes that hybrid systems based on atmospheric fuel cells and externally heated closed-cycle bottoming engines have the potential to outperform conventional pressurised fuel cells and gas turbines hybrids while preserving the topping system from the demanding operating conditions of the latter configuratio

Usabilidad en dashboards para analítica de Big Data

A día de hoy, una de las mayores industrias en el mundo del entretenimiento es la de los videojuegos. Actualmente, existen multitud de tipos de videojuegos entre los que se encuentran los “juegos serios”. Estos tienen como principal objetivo la educación, cuyo propósito es desafiar y generar metas a los jugadores. De la interacción entre los usuarios y los juegos serios, se genera información que se puede convertir en relevante y útil gracias a la analítica de aprendizaje. El presente trabajo fin de grado (a partir de ahora TFG) tiene como objetivo facilitar la creación de nuevas visualizaciones, que ayuden a interpretar los datos y que se integren dentro de una infraestructura de analítica de aprendizaje para su uso en juegos serios. En este TFG se ha creado una estructura de un plugin de visualización para Kibana, utilizando librerías de visualización externas que facilitan su creación. Para facilitar al máximo la creación de esta estructura, se ha programado un generador de proyectos. Para comprobar el funcionamiento de toda esta estructura, se realizan varios ejemplos utilizando el generador de plugins, donde se incorporan visualizaciones creadas por el autor de este TFG

Producción del disco CZ de El Corrientazo

Grabación, edición y mezcla en estudio de un producto fonográfico. Realizar la producción del primer disco compacto, descarga virtual o vinilo del grupo musical al cual pertenezco: El CorrientaZo.Maestro (a) en MúsicaPregrad

Contributo para um modelo de estimativa rápida de custos em propostas de engenharia - um caso da indústria da refrigeração

Esta dissertação nasce da oportunidade de aproximar o contexto empresarial ao contexto académico, desenvolvendo-se um estudo sobre os custos envolvidos em diversas obras, com vista a melhorar propostas de engenharia na indústria da refrigeração. O trabalho de orçamentação é um processo onde são envolvidos bastantes recursos, quer pessoais quer temporais. Um factor bastante relevante para a sua realização é a sua complexidade técnica, podendo demorar entre uma a duas semanas até à sua conclusão. Deste modo, esta dissertação focou-se em desenvolver uma metodologia onde é possível estimar o custo total de uma obra, a fim de reduzir a utilização destes recursos e a valorizálos. Nesta dissertação apresentam-se vários estudos com base nos custos analisados, onde é feito: • Uma análise do diferencial de custos globais nas obras analisadas; • Uma análise do diferencial de custos parciais nas obras analisadas; • Uma análise de quais as parcelas de uma obra que mais contribuem para o diferencial global de uma obra; • Um estudo de como é a constituição de uma obra, com base nos custos reais. Consequentemente obteve-se uma equação que permite estimar o custo total de uma obra, onde são utilizadas variáveis que ajudam a definir as características da mesma. Com base neste modelo é possível quantificar uma estimativa do custo para um orçamento em uma a duas horas.This thesis stems from the opportunity of bringing the corporate and academic contexts together, developing a study on the costs involved in several construction works with the objective of improving engineering proposals in the refrigeration industry. The process of budgeting involves several resources, both in terms of manpower and time. A deciding factor for their execution is their technical complexity, reaching one to two weeks until their conclusion. In this manner, this thesis focused on developing a methodology that enables the estimation of the total cost of a construction work, with the objective of reducing resource utilization and maximizing their usage. In this thesis, several studies based on the analyzed costs are presented, where the following are made: • Differential global cost analysis in the studied construction works; • Differential global cost analysis in the studied construction works; • An analysis of which parcels of a construction work most contribute to its global differential; • A study of the constitution of a construction work based on its real costs. As a result, an equation that allows the estimation of the total cost of a construction work was obtained, where several variables are used that allow the definition of its characteristics. Based on this model, it is possible to quantify a cost estimation for a budget in one to two hours

Automorphisms of moduli spaces of vector bundles over a curve

Let X be an irreducible smooth complex projective curve of genus g at least 4. Let M(r,\Lambda) be the moduli space of stable vector bundles over X or rank r and fixed determinant \Lambda, of degree d. We give a new proof of the fact that the automorphism group of M(r,\Lambda) is generated by automorphisms of the curve X, tensorization with suitable line bundles, and, if r divides 2d, also dualization of vector bundles.Comment: 12 page