Using simulation software to implement an active learning methodology in the university teaching.

IJERI: International Journal of Educational Research and Innovation, nº1, 2014, p. 87-98La pedagogía activa se fundamenta en que el alumno sea un sujeto activo en su propio aprendizaje y el docente actúe como un facilitador del proceso. Pese a que esta metodología presenta aspectos muy positivos, la mayoría de acciones se realizan en proyectos de escuelas activas ya que son muchas las dificultades para emplearla en el entorno universitario. Sin embargo, se hace patente la necesidad de un cambio desde el aprendizaje tradicional ¿industrializado¿ hacia una formación permanente, activa y experimentada para lo que resulta imprescindible el manejo de las nuevas tecnologías de información y comunicación (TIC). En este ámbito, resulta especialmente útil el empleo de simuladores, ya que mediante simulación el alumno es capaz de diseñar un modelo de un sistema real y llevar a cabo experiencias con él. En el presente trabajo, se propone el uso del programa informático de simulación de bioprocesos Aspen Batch Process Developer como herramienta para un aprendizaje activo en las enseñanzas prácticas de las asignaturas Procesos Biotecnológicos del Grado en Biotecnología e Ingeniería de los Bioprocesos del Máster en Biotecnología Ambiental, Industrial y Alimentaria de la Universidad Pablo de Olavide. Con el programa informático los alumnos manejarán balances de materia, parámetros de diseño y optimización propios de una industria biotecnológica. Durante el transcurso de las asignaturas se promueve la formación activa de los alumnos mediante el uso de un entorno virtual en el que se deposita material didáctico interactivo.Active learning pedagogy is based in the capacity of the students to be an active subject in their own learning and also the capacity of the teacher to act as a facilitator of the learning process. Although this methodology has many positive aspects, most actions are performed on active schools projects since there are many difficulties to use it in the University environment. However, there is an evident need for a change from the traditional "industrial" Página 88 Número 1. Año I (Junio 2014). learning towards an active and experiencing learning that will be essential for the management of new communication and information technologies. Specifically, it is particularly useful to use simulators because by means of the use of simulation programs the student is able to design a model of a real system and to conduct experiences with it. In this paper, we propose the use of a bioprocesses computer simulation program called Aspen Batch Process Developer. This program can be used as a tool for active learning in practical teaching courses such as Biotechnological Processes from Biotechnology Degree and Bioprocess Engineering from Master of Environmental, Industrial and Food Biotechnology, coursed in Pablo de Olavide University. Through this simulation program, students will be able to handle mass balances and design and optimization parameters related to a biotechnology industry. During the course, the active learning training of students is promoted through of the use of a virtual platform in which interactive teaching material is placed.Universidad Pablo de OlavideVersión del edito

Spin Glass Ordering in Diluted Magnetic Semiconductors: a Monte Carlo Study

We study the temperature-dilution phase diagram of a site-diluted Heisenberg antiferromagnet on a fcc lattice, with and without the Dzyaloshinskii-Moriya anisotropic term, fixed to realistic microscopic parameters for $IIB_{1-x} Mn_x Te$ (IIB=Cd, Hg, Zn). We show that the dipolar Dzyaloshinskii-Moriya anisotropy induces a finite-temperature phase transition to a spin glass phase, at dilutions larger than 80%. The resulting probability distribution of the order parameter P(q) is similar to the one found in the cubic lattice Edwards-Anderson Ising model. The critical exponents undergo large finite size corrections, but tend to values similar to the ones of the Edwards-Anderson-Ising model.Comment: 4 pages plus 3 postscript figure

Fabricación del electrodo superior en dispositivos moleculares mediante la formación de enlaces covalentes σ C-Au

Resumen del póster presentado a la 6ª Jornada de Jóvenes Investigadores en Física y Química de Aragón celebrada en Zaragoza el 20 de noviembre de 2014.-- et al.Peer reviewe

From an organometallic monolayer to an organic monolayer covered by metal nanoislands: A simple thermal protocol for the fabrication of the top contact electrode in molecular electronic devices

et al.In this contribution, a novel method for practical uses in the fabrication of the top contact electrode in a metal/organic monolayer/metal device is presented. The procedure involves the thermally induced decomposition of an organometallic compound, abbreviated as the TIDOC method. Monolayers incorporating the metal organic compounds (MOCs) [[4-{(4-carboxy)ethynyl}phenyl]ethynyl]-(triphenylphosphine)-gold, 1, or [1-isocyano-4-methoxybenzene]-[4-amino-phenylethynyl]-gold, 2, were annealed at moderate temperatures (1: 150 °C for 2h and 2: 100 °C for 2 h), resulting in cleavage of the Au-P or Au-C bond and reduction of Au(I) to Au(0) as metallic gold nanoparticles (GNPs). These particles are distributed on the surface of the film resulting in formation of metal/molecule/GNP sandwich structures. Electrical properties of these nascent devices were determined by recording I¿V curves with a conductive-AFM. The I¿V curves collected from these metal/organic monolayer/GNPs sandwich structures are typical of metal-molecule-metal junctions, with no low resistance traces characteristic of metallic short circuits observed over a wide range of set-point forces. The TIDOC method is therefore an effective procedure for the fabrication of molecular junctions for the emerging area of molecular electronics.Peer Reviewe

Is trivial the antiferromagnetic RP(2) model in four dimensions?

We study the antiferromagnetic RP(2) model in four dimensions. We find a second order transition with two order parameters, one ferromagnetic and the other antiferromagnetic. The antiferromagnetic sector has mean-field critical exponents and a renormalized coupling which goes to zero in the continuum limit. The exponents of the ferromagnetic channel are not the mean-field ones, but the difference can be interpreted as logarithmic corrections. We perform a detailed analysis of these corrections and conclude the triviality of the continuum limit of this model.Comment: 21 pages, 5 figures, LaTeX2

A new test for random number generators: Schwinger-Dyson equations for the Ising model

We use a set of Schwinger-Dyson equations for the Ising Model to check several random number generators. For the model in two and three dimensions, it is shown that the equations are sensitive tests of bias originated by the random numbers. The method is almost costless in computer time when added to any simulation.Comment: 6 pages, 3 figure

Critical Behavior of the Three-Dimensional Ising Spin Glass

We have simulated, using parallel tempering, the three dimensional Ising spin glass model with binary couplings in a helicoidal geometry. The largest lattice (L=20) has been studied using a dedicated computer (the SUE machine). We have obtained, measuring the correlation length in the critical region, a strong evidence for a second-order finite temperature phase transition ruling out other possible scenarios like a Kosterlitz-Thouless phase transition. Precise values for the $\nu$ and $\eta$ critical exponents are also presented.Comment: RevTex; 12 pages plus 5 ps figures. Final version to be published in PR

Tuning the size, composition and structure of Au and Co50Au50 Nanoparticles by High-Power Impulse Magnetron Sputtering in gas-phase Synthesis

Gas-phase synthesis of nanoparticles with different structural and chemical distribution is reported using a circular magnetron sputtering in an ion cluster source by applying high-power impulses. The influence of the pulse characteristics on the final deposit was evaluated on Au nanoparticles. The results have been compared with the more common direct current approach. In addition, it is shown for the first time that high-power impulses in magnetron based gas aggregation sources allows the growth of binary nanoparticles, CoAu in this case, with a variety of crystalline and chemical arrangements which are analyzed at the atomic level

Estrategias metodológicas para el aprendizaje basado en proyectos de investigación en Ingeniería de Bioprocesos

El desarrollo de métodos interactivos que propician el intercambio de información entre el alumnado y profesorado ha significado un esfuerzo importante para ambos, ya que rompen con el estrecho espacio formativo que deja la clásica transmisión mecánica y verbalista de conocimientos. Marcando como objetivo la superación del 'argumento de autoridad', se han propuesto diversas estrategias para llevar a cabo procesos de aprendizaje basados en investigación. En el presente estudio se hace un recorrido por los diversos métodos interactivos de enseñanza- aprendizaje haciendo especial hincapié en las estrategias metodológicas del aprendizaje basado en proyectos experimentales debido a su especial relevancia en el ámbito científico. Se propone un método de preselección por parte del alumnado así como cuatro fases principales para llevar a cabo un trabajo de investigación de calidad. La primera fase consiste en una propuesta inicial en la que se ofertan al alumnado los proyectos a elegir por el grupo ECOWAL para realizar el trabajo fin de Máster y en la que el alumnado debe construir una base documental o ¿estado del arte¿. Durante la segunda fase o ¿diseño de la investigación¿ se marcan unos objetivos claros y se diseña el trabajo experimental a realizar. Seguidamente, se propone una tercera fase de recogida y tratamiento de datos y se detalla especialmente cómo realizar el informe con el que concluye la cuarta fase. Los intercambios de ideas, los apoyos que se prestan tanto entre iguales, así como las aportaciones procedentes del docente u otro colaborador, hacen de este sistema un tejido cultural compartido excelente para el aprendizaje del alumnado en el campo de la Ingeniería Química.Artículo revisado por pare

From traditional paper to nanocomposite films: Analysis of global research into cellulose for food packaging

This bibliometric study encompasses all publications between 2000 and 2020 on the production of cellulosecontaining food packaging, often proposed as an alternative to petro-based materials. Results show a fastgrowing interest in this area, especially during the last decade, with 1029 documents published in highimpact journals. In a topic where countries such as Italy, Sweden and Spain show high scientific production per capita, the most influential groups are based in European institutions (Universit`a degli Studi di Perugia and Grenoble Institute of Technology). Among more than 7000 keywords, those with high co-occurrence were analyzed to identify not only the most important research areas, but also current knowledge gaps. It was found that composites in which cellulose is the reinforcing material, commonly as nanofibers or nanocrystals, are becoming more frequent than cellulose-based packaging. The matrix of such composites is, generally speaking, another biopolymer, but their potential to replace conventional thermoplastic materials remains under question.Departamento de Biología Molecular e Ingeniería Bioquímic