Students’ perceptions of their learning outcomes in a flipped classroom environment

The flipped classroom model has positive effects on the educational process, and has recently become an alternative to the traditional model. However, additional research is necessary to identify the causes of those improvements and the contexts in which this methodology performs better. In this study, we analyze the perceptions of different students pursuing a bachelor’s degree at the University of Jaén (Spain) regarding flipped learning dynamics and the relationship between those perceptions and perceptions of their learning outcomes. Specifically, we investigate whether students’ acquired competences and attitude, as well as the use of formative assessment have positive effects on student perceptions on results. To accomplish this task, during the first semester of the 2020–2021 and 2021–2022 academic years, we collected the opinions of students via a questionnaire and tested those relationships using PLS. The results indicate that the three variables (acquired competences, attitude, and formative assessment) explain the perceptions of students with respect to achieving better grades, and are key elements of superior learning, that can improve students’ performance. Accordingly, this study provides evidence regarding the positive effects of flipped classroom on the teaching–learning process in higher education and explains the reasons for the resulting improvement in learning outcomes.Proyecto de Innovación Docente de la Universidad de Jaén “Aulas invertidas (Flipped Classroom): Una nueva forma de enseñar y aprender”, financiado por la Universidad de Jaén (España) (PIMED-UJA 2019)

High-frequency collective excitations in molten and glassy Te studied by inelastic neutron scattering

7 págs.; 5 figs.; 1 tab. ; PACS number s : 61.25.Mv, 61.43.Er, 61.20.Lc, 61.12. qhttp://dx.doi.org/10.1103/PhysRevB.73.094201The spectra of collective excitations of liquid and glassy tellurium have been studied by means of inelastic neutron scattering. Here we report on the dynamics of liquid Te as measured at two different temperatures, just above melting (Tm =723 K) and at ∼1000 K as well as the glass that is studied at room temperature. Estimates for the velocity of propagating excitations for both temperatures have been obtained from the experimental data, and a contrasting behavior is found with respect to anomalies shown by the adiabatic sound velocity measured by ultrasound methods. The origin of such differences is finally discussed. © 2006 The American Physical Society.This work was supported in part by Grant No. MAT2002- 04178-C04 SpainPeer Reviewe

Students’ attitude: Key to understanding the improvement of their academic RESULTS in a flipped classroom environment

The flipped classroom model has been shown in recent years to have a positive effect on students’ motivation and academic performance. In this paper, we analyze the perception that students of six undergraduate subjects at University of Ja´en (Spain) have of the subjects’ formative assessment and their attitude towards this new teaching-learning model. In addition, we analyze whether both variables influence their perception of achieving better academic results. The results of our study show that both aspects (formative assessment perception and attitude) explain students’ perception of outcomes. It leads us to conclude that students’ attitude is a key element of fostering more and better learning that improves their performance. In this way, our results provide further evidence for the literature on the positive effects of the flipped classroom on the teaching-learning process at the university level for students, teachers and scholars.“Aulas invertidas (Flipped Classroom): Una nueva forma de enseñar y aprender”, financiado por la Universidad de Jaén en el marco del “Plan de Innovación y Mejora Docente” (PIMED-UJA 2019

La dimensión afectiva olvidada del conocimiento didáctico del contenido de los profesores de ciencias

Shulman se refería al paradigma olvidado de la investigación sobre el profesor el que no se hubiese considerado el contenido de la materia específica, lo que le llevó a desarrollar el Conocimiento Didáctico del Contenido (CDC). Sin embargo la dimensión afectiva y emocional podemos considerarla la parte olvidada del CDC. Shulman consideraba que el CDC es una forma de razonamiento y de acción didáctica por medio de la cual los profesores transforman el contenido en representaciones comprensibles a los estudiantes. Investigaciones recientes indican que no hay acción humana, sin una emoción que la haga posible. Desde esta perspectiva es indudable que las emociones del profesor formarían parte del CDC. En el simposio mostraremos la relación entre lo cognitivo y lo afectivo del profesor y la necesidad de incluir la dimensión afectiva en el CDC de los profesores de ciencias

Microscopic dynamics in molten Ni: Experimental scrutiny of embedded-atom-potential simulations

11 págs.; 10 figs. ; PACS number s : 66.10. x, 66.20. d, 63.20.LsThe stochastic dynamics in molten nickel is studied by neutron scattering. The quasielastic spectrum shows two distinct components having disparate linewidths. The wave-vector dependence of the narrow component is shown to arise from incoherent scattering at low momentum transfers. In turn, the spectral half-width of the wider component shows a modulation with wave vector characteristic of coherent quasielastic scattering. The analysis of both components provides direct experimental estimates for the self-diffusion coefficient, as well as the effective particle diameter. The experimental data are then used to validate computer simulation results which are derived using an embedded-atom potential. Such results are also employed to explore regions in frequency-wave-vector space not easily amenable to experiment. In addition, simulation results are also compared with data pertaining to the collective motions. Such an exercise reveals the need to develop a further level in the memory function expansion of the coherent dynamic structure factor. The implications of such findings for our current understanding of the dynamics of liquid metals are finally assessed. © 2007 The American Physical Society.Peer Reviewe

1–42 b -Amyloid peptide requires PDK1/nPKC/Rac 1 pathway to induce neuronal death

1–42 b -Amyloid peptide requires PDK1/nPKC/Rac 1 pathway to induce neuronal death L Manterola 1,12 , M Hernando-Rodr ı ́ guez 2,12 , A Ruiz 3,4 , A Apraiz 5 , O Arrizabalaga 5 , L Vello ́ n 6 , E Alberdi 3,4 , F Cavaliere 3,4 , HM Lacerda 7 , S Jimenez 8,9 , LA Parada 10 , C Matute 3,4 and JL Zugaza 4,5,11 1–42 b -Amyloid (A b 1–42 ) peptide is a key molecule involved in the development of Alzheimer’s disease. Some of its effects are manifested at the neuronal morphological level. These morphological changes involve loss of neurites due to cytoskeleton alterations. However, the mechanism of A b 1–42 peptide activation of the neurodegenerative program is still poorly understood. Here, A b 1–42 peptide-induced transduction of cellular death signals through the phosphatidylinositol 3-kinase (PI3K)/ phosphoinositol-dependent kinase (PDK)/novel protein kinase C (nPKC)/Rac 1 axis is described. Furthermore, pharmacological inhibition of PDK1 and nPKC activities blocks Rac 1 activation and neuronal cell death. Our results provide insights into an unsuspected connection between PDK1, nPKCs and Rac 1 in the same signal-transduction pathway and points out nPKCs and Rac 1 as potential therapeutic targets to block the toxic effects of A b 1–42 peptide in neurons

Manuel García, el Espartero : (apuntes biográficos)

Copia digital. Valladolid : Junta de Castilla y León. Consejería de Cultura y Turismo, 201

Obtención de cemento eco-eficiente a base de ceniza procedente de caldera de lecho fluidizado

El objetivo principal de este trabajo ha sido la valorización de una ceniza procedente de un combustor de lecho fluidizado de biomasa forestal (CCBF) para su posible empleo como adición puzolánica con el fin de obtener un material base cemento más ecoeficiente. Esta ceniza es un residuo procedente de un combustor que es alimentado fundamentalmente por restos de corteza de eucalipto para la fabricación de pasta de papel, originando toneladas de dichas cenizas. La ceniza CCBF tiene importantes contenidos en SiO2, CaO, Al2O3 y K2O, como componentes mayoritarios. Estos óxidos la hacen atractiva para el campo de los materiales de construcción. Para su valorización se somete a la ceniza a un tratamiento hidrotermal (TH) durante un periodo de 4h a dos temperaturas (150 y 200ºC) en contacto con dos medios, agua desmineralizada y una disolución de NaOH 1M, en ambos casos se ha empleado una relación líquido/sólido de 10. Los cambios que se producen en la fase sólida resultante del TH se analizan mediante diferentes técnicas de caracterización Después del TH, se identifica, como fase predominante, la fase tipo tobermorita, precursora del gel C-S-H. La obtención de dicha fase, se optimiza durante el TH a 200ºC, temperatura en la que desapareen prácticamente la fase cuarzo y disminuye la de calcita, lo que favorece la formación de las fases tobermorita por incorporación de iones calcio y silicio, a su estructura. Previa a la incorporación de la ceniza a la matriz de cemento es necesario determinar su activididad puzolánica. Por ello, se ha estudiado la actividad puzolánica de la ceniza CCBF y de la ceniza CCBF activada hidrotermalmente (200ºC/4h). Para determinar esta activiad se ha empleado en ambos casos el método de la disolución saturada de cal, desarrollado en el Instituto Ciencias de la Construcción “Eduardo Torroja”. En ambas cenizas, CCBF y CCBF-200º/4h, se alcanzan valores de cal fijada a los 28 días, de 52,1 y 98,2% respectivamente. Debido a la alta actividad puzolánica que presentan, se procedió a una sustitución parcial de cemento Portland por ambas cenizas, en porcentajes del 0, 10 y 20% del cemento por ceniza, según la EN 196-3. Para evaluar el efecto de las mismas, se fabricaron probetas de 1x1x6cm, las cuales se sometieron a pruebas de resistencia mecánica a compresión a diferentes edades de hidratación (2, 7 y 28 días). Se pudo observar como con la adición de ambos tipos de ceniza mejoraba hasta un 30% la resistencia mecánica a los 28 días en relación a la referencia (0%), obteniendo mayores resistencias en ambos casos (CCBF y CCBF-200ºC-4h) con el 10% de sustitució

Tough Tables: Carefully Evaluating Entity Linking for Tabular Data

Table annotation is a key task to improve querying the Web and support the Knowledge Graph population from legacy sources (tables). Last year, the SemTab challenge was introduced to unify different efforts to evaluate table annotation algorithms by providing a common interface and several general-purpose datasets as a ground truth. The SemTab dataset is useful to have a general understanding of how these algorithms work, and the organizers of the challenge included some artificial noise to the data to make the annotation trickier. However, it is hard to analyze specific aspects in an automatic way. For example, the ambiguity of names at the entity-level can largely affect the quality of the annotation. In this paper, we propose a novel dataset to complement the datasets proposed by SemTab. The dataset consists of a set of high-quality manually-curated tables with non-obviously linkable cells, i.e., where values are ambiguous names, typos, and misspelled entity names not appearing in the current version of the SemTab dataset. These challenges are particularly relevant for the ingestion of structured legacy sources into existing knowledge graphs. Evaluations run on this dataset show that ambiguity is a key problem for entity linking algorithms and encourage a promising direction for future work in the field