BUSCADOR RECOLECTA

Esta investigación de carácter descriptivo analiza en qué medida una muestra aleatoria de 136 aplicaciones de software educativo orientado a niveles iniciales se corresponde con los planteamientos educativos y los rasgos clásicos de una unidad didáctica.

A completely chemo- and regioselective synthesis of pyrimidin-4(3H)-ones by reaction between 4,5-dihydro-1,2,4-oxadiazoles and chromium alkoxy alkynyl Fischer carbene complexes is reported. Overall, it is a formal (3+3)-cycloaddition where 4,5-dihydro-1,2,4-oxadiazoles partake for the first time in the intermolecular formation of 6-membered heterocycles. Three points of diversity have been explored, and usually, synthetically useful isolated yields are reached, including one example at gram-scale. A reasonable mechanism, supported by DFT calculations, is proposed., - Ministerio de Ciencia, Innovación y Universidades of Spain (Agencia Estatal de Investigación: PID2022-140635NB-I00, PID2019-107580GB-I00/AEI/10.13039/501100011033) - Agencia de Ciencia, Competitividad Empresarial e Innovacion Asturiana –SEKUENS – (SEK-25-GRU-GIC-24-030). - MCIU predoctoral FPI contract to S. S.-A.

Spanish Ministry of Economy and Competitiveness (MINECO), Spanish Ministry of Science and Innovation (MICINN) respectively and Asturias Regional Government.

Se presenta el primer protocolo inducido por luz visible para la preparación general de tiocianatos alquenilos a partir de bromuros alquenilos. La reacción es simple, se lleva a cabo bajo condiciones muy suaves y demuestra una amplia tolerancia a grupos funcionales. Además, se desarrolló un protocolo en flujo para permitir una ampliación eficiente de la síntesis de tiocianatos alquenilos, mejorando aún más la practicidad y el valor del método. Es importante destacar que estos tiocianatos alquenilos sirven como valiosos bloques de construcción para la construcción de diversas familias de moléculas que contienen azufre a través de trifluorometilaciones, cicloadiciones, oxidaciones y reacciones de formación de enlaces C–S o P–S., Se agradece sinceramente la beca predoctoral “Severo Ochoa” (BP21/050) concedida a H. F. P. por FICYT (Principado de Asturias) y la beca postdoctoral “Ramón y Cajal” concedida a M. P. (MCINN-24-RYC2022-035485-I) por el Ministerio de Ciencia e Innovación de España (Agencia Estatal de Investigación). También se agradece el apoyo financiero de este trabajo por parte del Ministerio de Ciencia e Innovación de España (Agencia Estatal de Investigación: MCINN-23-PID2022-140635NB-I00/MCIN/AEI/10.13039/501100011033/FEDER, UE) y la Universidad de Oviedo (PAPI-23-GR-COM-04).

Partiendo de la base de que el poder se construye, sobre todo, en la comunicación (Castells, 2009), se evidencia la importancia de la capacidad comunicativa. Dicho de otra manera: Comunicación es poder. No en vano, las grandes empresas y los gobiernos invierten muchos esfuerzos en su capacidad de comunicación. Al mismo tiempo, la competencia comunicativa a un nivel individual es un prerrequisito básico para la participación en los procesos de la sociedad, ya que permite a los individuos desarrollarse profesionalmente, integrarse socialmente y, por ende, lograr una realización personal más satisfactoria. Debido a la creciente globalización y digitalización tanto de la vida cotidiana como del mundo laboral, las fronteras entre países se desdibujan, las distancias se acortan y los procesos se internacionalizan. Por lo tanto, la comunicación debe ser también internacional, lo que implica la necesidad de aprender lenguas extranjeras y poder comunicarse en ellas. La competencia comunicativa en una o varias len-guas se convierte así en un requisito fundamental para la ciudadanía. Estos cambios socioeconómicas y las exigencias resultantes también se han registrado en el ámbito de la didáctica de las lenguas extranjeras y han contribuido a un cambio de paradigma, en el sentido de favorecer cada vez más el desarrollo de las diversas competencias, entre ellas la competencia comunicativa (Villa y Poblete, 2010). En este contexto, el principal objetivo del presente trabajo es investigar empíricamente el potencial que ofrece el aprendizaje mediante la comunicación en un entorno tándem para el desarrollo de competencias lingüísticas generales.

Data from the article "M. Garcia, F. Ortin, J. Quiroga. An Infrastructure to Deliver Synchronous Remote Programming Labs. Transactions on Learning Technologies, Volume 14(2), pp. 161-172, 2021. https://doi.org/10.1109/TLT.2021.3063298", With the abrupt nationwide lockdown caused by the COVID-19 pandemic, many universities suspended face-to-face activities. Some of them decided to continue their academic courses, adapting traditional approaches to online learning. An important challenge was to deliver programming labs over the Internet without important methodological changes, which might imply modifications of the learning outcomes. Most of the existing approaches to remote programming labs are based on asynchronous learning, where students work autonomously and contact the lecturers if they have any issues. The existing systems to provide synchronous programming labs are restricted to a single programming language or application type, and show significant interaction limitations. Therefore, we defined an infrastructure that allowed us to deliver synchronous programming labs over the Internet during the COVID-19 lockdown, as we used to do face-to-face. After using it for both programming labs and exams, students showed a high level of satisfaction. Compared to previous years, the use of our system produced no statistically significant difference in student's grades, pass and fail rates, or the number of students taking the lab exam. The network bandwidth, CPU, and memory resources consumed are sufficiently low to have allowed all the students to use it without any issues. Regardless of the pedagogical and methodological approach selected, our infrastructure provides the synchronous and remote delivery of programming labs, similar to the original face-to-face approach. Its features make it appropriate to deliver synchronous remote classes where strong lecturer-student interaction is required, and all the student work can be done with their computers., This work has been partially funded by the Spanish Department of Science, Innovation and Universities: project RTI2018-099235-B-I00. The authors have also received funds from the University of Oviedo through its support of official research groups (GR-2011-0040).

Supplementary information for the article "Photochemical carboborylation and three- component difunctionalization of a,b-unsaturated ketones with boronic acids via tosylhydrazones" Chemical Science: DOI: 10.1039/d4sc06537. The data are contained in a word .docx file with the chemdraw and NMR data embebed. NMR data in mestrenova format can be retrieved from the file. NMR data for each compound in Bruker format., Supplementary information for the article "Photochemical carboborylation and three- component difunctionalization of a,b-unsaturated ketones with boronic acids via tosylhydrazones" Chemical Science: DOI: 10.1039/d4sc06537. The ChemDraw structures and the NMR data are embebed in the .docx file. NMR data can be retrieved in mestrenova format., Financial support of this work by Ministerio de Ciencia e Innovación of Spain (Agencia Estatal de Investigación: grant MCINN-23-PID2022-140635NB-I00 Financed by MCIN/AEI/ 10.13039/501100011033/FEDER, UE). A FPI predoctoral contract to A.V.-M. (MCINN-24-PREP2022-000214) and a “Ramón y Cajal” postdoctoral grant to M. P. (MCINN-24-RYC2022-035485-I) by Ministerio de Ciencia e Innovación of Spain (Agencia Estatal de Investigación) are gratefully acknowledged

Data Documentation for “A general sizing methodology of grid-connected PV systems to meet the zero-energy goal in buildings”, This research has received national funds from the Spain Ministry of Universities, through the FPU program (FPU21/05062).

This dataset corresponds to the near field (NF) measurements of a 70 cm diameter offset reflector antenna, fed with a circularly polarized helix antenna, working at 4650 MHz [1,2]. The reflector antenna was measured at the spherical range in an anechoic chamber of the University of Oviedo, in Spain. This anechoic chamber has a roll over azimuth positioner that enables full spherical acquisions. Two different measurement distances were considered, R1 = 3.198 m and R2 = 5.191 m. Samples on both spherical acquisition surfaces were taken according to a sampling rate of 1 degree in theta (or azimuth axis), and 3 degrees in phi (roll axis). The two tangential components of the electric field (Eth, Eph) were measured. This dataset can be used for testing near-field-to-far-field (NF-FF) transformation techniques [3]. Besides, measurements are provided at two different distances, thus enabling the assessment of amplitude-only antenna diagnostics and NF-FF transformation methods [4-7]. [1] García Fernández, M.; Álvarez López, Y.; Las-Heras, F. Dual-Probe Near-Field Phaseless Antenna Measurement System on Board a UAV. Sensors 2019, 19, 4663. [2] M. G. Fernández, Y. Álvarez López and F. L. -H. Andrés, "Advances in Antenna Measurement and Characterization Using Unmanned Aerial Vehicles," 2019 13th European Conference on Antennas and Propagation (EuCAP), Krakow, Poland, 2019, pp. 1-5. [3] Y. Alvarez, F. Las-Heras and M. R. Pino, "Reconstruction of Equivalent Currents Distribution Over Arbitrary Three-Dimensional Surfaces Based on Integral Equation Algorithms," in IEEE Transactions on Antennas and Propagation, vol. 55, no. 12, pp. 3460-3468, Dec. 2007, [4] C. Cappellin, A. Frandsen and O. Breinbjerg, "Application of the SWE-to-PWE antenna diagnostics technique to an offset reflector antenna", IEEE Antennas Propag. Mag., vol. 50, no. 5, pp. 204-213, Oct. 2008. [5] Y. Alvarez, F. Las-Heras, and M. R. Pino, “The sources reconstruction method for amplitude-only field measurements,” IEEE Transactions on Antennas and Propagation, vol. 58, no. 8, pp. 2776–2781, 2010. [6] Zhi-Xiang Xie, Yun-Hua Zhang, Si-Yuan He, Guo-Qiang Zhu, "A Novel Method for Source Reconstruction Based on Spherical Wave Expansion and NF-FF Transformation Using Amplitude-Only Data", IEEE Transactions on Antennas and Propagation, vol.67, no.7, pp.4756-4767, 2019. [7] Fernando Rodríguez Varela, Javier Fernandez Álvarez, Belén Galocha Iragüen, Manuel Sierra Castañer, Olav Breinbjerg, "Numerical and Experimental Investigation of Phaseless Spherical Near-Field Antenna Measurements", IEEE Transactions on Antennas and Propagation, vol.69, no.12, pp.8830-8841,, Funding Agency: Ministerio de Ciencia e Innovación of Spain, Agencia Estatal de Investigación of Spain, and Fondo Europeo de Desarrollo Regional (FEDER) Grant Number: PID2021-122697OB-I00 (“META-IMAGER”)

Esta investigación de carácter naturalista, obtiene datos por medio de analíticas de aprendizaje de juegos serios para la predicción del rendimiento académico en enseñanza elemental.