Deconstructing the I and SLA in ISLA: One curricular approach

Instructed second language acquisition (ISLA) has been referenced in the larger field of the SLA literature for over two and a half decades. Currently, there are several theoretical underpinnings accounting for processes assumed to play a role in ISLA and quite an impressive number of studies have empirically addressed some aspect(s) of ISLA. Recently, a lengthy and relatively cohesive treatise of this substrand of SLA research in relation to both theoretical, empirical, and pedagogical perspectives has been published in two books (cf. Leow, 2015a; Loewen, 2015), and a new model of the L2 learning process in ISLA has been proposed (Leow, 2015a). These publications are timely and important given that the concept of ISLA not only needs to be clearly defined but also situated contextually. To this end, this article (a) revisits current definitions of ISLA in the SLA literature with the aim of identifying specific features of ISLA that underlie such definitions, (b) deconstructs ISLA by probing deeper into what comprises the terms instructed and SLA in ISLA, (c) provides a brief summary of the cognitive processes and variables postulated by the theoretical underpinnings of ISLA and pertinent empirical research, (d) recommends that ISLA be observed from one curricular approach together with its empirical and pedagogical ramifications, and (e) provides some measure of direction future ISLA research may follow

Fuentes de información en línea sobre FOL: modelo de clasificación y propuesta de repertorio, con justificación y desarrollo metodológicos

El presente trabajo es una respuesta a una cuestión planteada durante el periodo de prácticas del alumno en el centro de enseñanza y que se deriva de la heterogeneidad de estudios de acceso del profesorado y la variedad y disparidad de los contenidos del módulo de FOL. Éstos responden a distintas y diferentes áreas de conocimiento conectados con la realidad laboral, lo que provoca en los profesores una cierta sensación de inseguridad pues les es difícil ser competente en todos ellos. Por otro lado, la misma realidad laboral, influida por el entorno social, económico y normativo, es muy cambiante. La crisis económica, los cambios sociales y tecnológicos y, particularmente, las respuestas legislativas en forma de desregulación laboral son otro factor importante que afecta no solo a la manera en que se imparte el módulo sino a su contenido. El objetivo ha sido ofrecer una respuesta metodológica al recurso, cada vez más frecuente, a la información en internet, consistente en la clasificación, análisis, evaluación, descripción y presentación de las fuentes de información disponibles, creando un baremo sobre usabilidad, actualidad y autoridad, entre otras características, que sirva de guía para su empleo por el profesorado

Browsing Digital Collections with Reconfigurable Faceted Thesauri

Faceted thesauri group classification terms into hierarchically arranged facets. They enable faceted browsing, a well-known browsing technique that makes it possible to navigate digital collections by recursively choosing terms in the facet hierarchy. In this paper we develop an approach to achieve faceted browsing in live collections, in which not only the contents but also the thesauri can be constantly reorganized. We start by introducing a digital collection model letting users reconfigure facet hierarchies. Then we introduce navigation automata as an efficient way of supporting faceted browsing in these collections. Since, in the worst-case, the number of states in these automata can grow exponentially, we propose two alternative indexing strategies able to bridge this complexity: inverted indexes and navigation dendrograms. Finally, by comparing these strategies in the context of Clavy, a system for managing collections with reconfigurable structures in digital humanities and educational settings, we provide evidence that navigation dendrogram organization outperforms the inverted index-based one

Learning Object Repositories with Dynamically Reconfigurable Metadata Schemata

[ES] In this paper we describe a model of learning object repository in which users have full control on the metadata schemata. Thus, they can define new schemata and they can reconfigure existing ones in a collaborative fashion. As consequence, the repository must react to changes in schemata in a dynamic and responsive way. Since schemata enable operations like navigation and search, dynamic reconfigurability requires clever indexing strategies, resilient to changes in these schemata. For this purpose, we have used conventional inverted indexing approaches and we have also devised a hierarchical clusteringbased indexing model. By using Clavy, a system for managing learning object repositories in the field of the Humanities, we provide some experimental results that show how the hierarchical clustering-based model can outperform the more conventional inverted indexes-based solutions

Organometallic Nanoparticles Ligated by NHCs: Synthesis, Surface Chemistry and Ligand Effects

[EN] Over the last 20 years, the use of metallic nanoparticles (MNPs) in catalysis has awakened a great interest in the scientific community, mainly due to the many advantages of this kind of nanostructures in catalytic applications. MNPs exhibit the characteristic stability of heterogeneous catalysts, but with a higher active surface area than conventional metallic materials. However, despite their higher activity, MNPs present a wide variety of active sites, which makes it difficult to control their selectivity in catalytic processes. An efficient way to modulate the activity/selectivity of MNPs is the use of coordinating ligands, which transforms the MNP surface, subsequently modifying the nanoparticle catalytic properties. In relation to this, the use of N-heterocyclic carbenes (NHC) as stabilizing ligands has demonstrated to be an effective tool to modify the size, stability, solubility and catalytic reactivity of MNPs. Although NHC-stabilized MNPs can be prepared by different synthetic methods, this review is centered on those prepared by an organometallic approach. Here, an organometallic precursor is decomposed under H-2 in the presence of non-stoichiometric amounts of the corresponding NHC-ligand. The resulting organometallic nanoparticles present a clean surface, which makes them perfect candidates for catalytic applications and surface studies. In short, this revision study emphasizes the great versatility of NHC ligands as MNP stabilizers, as well as their influence on catalysis.This research was funded by: Proyectos Intramurales Especiales (201880E079), Primero Proyectos de Investigacion PAID-06-18 (SP20180088), Agencia Estatal de Investigacion (PID2019-104159GB-I00/AEI/10.13039/501100011033) and Junta de Andalucia (PY18-3208). The authors thank Instituto de Tecnología Química (ITQ), Consejo Superior de Investigaciones Científicas (CSIC), Universitat Politècnica de València (UPV), Departamento de Química Inorgánica (University of Seville), Institute for Chemical Research (IIQ) for the facilities and Severo Ochoa excellence programme, C.C.-N. thanks Generalitat Valenciana for the predoctoral GVA fellowship (ACIF/2019/076). We gratefully acknowledge B. Chaudret for his invaluable contribution to this research area and his sincere friendship.Cerezo-Navarrete, C.; Lara, P.; Martínez-Prieto, LM. (2020). Organometallic Nanoparticles Ligated by NHCs: Synthesis, Surface Chemistry and Ligand Effects. Catalysts. 10(10):1-30. https://doi.org/10.3390/catal10101144S1301010Hopkinson, M. N., Richter, C., Schedler, M., & Glorius, F. (2014). An overview of N-heterocyclic carbenes. Nature, 510(7506), 485-496. doi:10.1038/nature13384Smith, C. A., Narouz, M. R., Lummis, P. A., Singh, I., Nazemi, A., Li, C.-H., & Crudden, C. M. 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Nuclear Magne

Estudio sobre las concepciones didácticas de un grupo de futuros maestros de Primaria : permanencias y cambios metodológicos

El presente trabajo trata sobre una investigación en la Universidad de Sevilla acerca de las concepciones didácticas de 12 alumnos/as del grado de Educación Primaria. Para ello se profundizará sobre el trabajo realizado durante sus prácticas en su tercer curso. Para tal fin se ha utilizado una metodología cualitativa correspondiente en una entrevista semi-estructurada con preguntas abiertas y semi-abiertas. Además, este trabajo ha sido fundamentado principalmente a partir del estudio de los Modelos Didácticos como Instrumentos de Análisis y de Intervención en la realidad educativa a través de sus 5 categorías. A su vez, se indicará las posibles transformaciones que hayan podido experimentar estos alumnos/as universitarios durante su proceso de prácticas y se tratará de explicar porque se han podido producir dichos cambios. Igualmente, se valoran las oportunidades que ofrece la Universidad de Sevilla a estos aspirantes a maestros, también cómo esta institución fomenta sus prácticas para este grado, equivalentemente se conocerán las experiencias que tuvieron estos futuros docentes junto a sus alumnos, la creatividad que emplearon en sus aulas, etc.Universidad de Sevilla. Grado en Educación Primari

Evaluating the whiteness of spectroscopy-based non-destructive analytical methods – Application to food analytical control

Recent advancements in analytical chemistry in the food quality field have emphasized ecofriendly analytical techniques eschewing chemicals and solvents. Various methodologies exist for assessing the sustainability of analytical methods, however none has provided guidance for appraising non-destructive methods, especially predevelopment. Among these, the RGB approach stands out, evaluating method colour via three main criteria: analytical performance, environmental impact, and practical efficiency. This framework offers a comprehensive evaluation, aiming for a "white" colour denoting excellence across all three categories. This article introduces an adapted RGB method for ex-ante evaluation of new non-destructive analytical methods pre-development. It outlines key steps for evaluating method "whiteness". As a guiding example, the approach was applied to three analytical methods focussed on quality and authenticity control of edible vege- table oils utilizing solvent-free spectroscopic techniques. Results underscored a priori feasibility assessment value, aligning evaluative objectives with intended method goals.Project (ref.: CPP2021-008672), funded by MCIN/AEI/501100011033 (Spanish Ministry of Science and Innovation)European Union NextGenerationEU/PRTR"Funding for open access charge: Universidad de Granada / CBU