Visual learning style in Engineering. Utility in the teaching of the electric field

[ES] La contracci´on/compresi´on experimentada por los programas de la ense˜nanza de la Ingenier´ıa, desde los cinco/seis cursos cl´asicos a los cuatro del Grado actual, propicia un proceso de ense˜nanza-aprendizaje que sobrevuela muchos contenidos sin poder detenerse en ellos. Los alumnos contactan con los conceptos te´oricos y los algoritmos correspondientes, e identifican las actuaciones matem´aticas pertinentes, pero la penuria crediticia priva de las habilidades instrumentales para aplicarlas. El resultado puede ser un aprendizaje parcial y superficial. Este trabajo propone una actuaci´on docente para que el alumno adquiera habilidades en MATLAB como respuesta a necesidades concretas detectadas en el alumnado de materias vinculadas con Ingenier´ıa El´ectrica. Se parte de dos consideraciones iniciales: la constataci´on del predominio del estilo de aprendizaje visual de los alumnos de la UPCT por un lado, y por el otro, de la filosof´ıa de que las matem´aticas, para ser productivas en la Ense˜nanza de la Ingenier´ıa, necesitan del ordenador.[EN] The contraction/compression experienced by the engineering education programs, from the classical five/-six courses to the four courses of the current Degree, promotes a teaching-learning process that overflows many contents without being able to reflect on them. The students contact the theoretical concepts and the corresponding algorithms, and identify the pertinent mathematical actions, but the credit shortage deprives of the instrumental abilities to apply them. The result can be a partial and superficial learning. This work proposes a teaching performance for the student to acquire skills in MATLAB as a response to specific needs detected in the students of matters concerned with Electrical Engineering. Two starting points can be considered: the verification of the predominance of the visual learning style of the studentsof the Technical University of Cartagena (UPCT), and the philosophy that mathematics needs computersto be productive in the Teaching of Engineering.Vicéns Moltó, J.; Zamora Parra, B.; Hervás, R. (2020). Estilo de aprendizaje visual en la Ingeniería. Utilidad en la docencia de la rama eléctrica. Modelling in Science Education and Learning. 13(1):29-36. https://doi.org/10.4995/msel.2020.12117OJS2936131Chapra, Steven C. (2018) Applied numerical methods with MATLAB for engineers and scientists. McGraw-Hill Education, New York. 715 pp.Felder, R. M., Soloman, B. A., Index of Learning Styles Questionnaire. https://www.webtools.ncsu.edu/learningstyles/Felder, R. M., Silverman, L. (1988). Learning and Teaching Styles in Engineering Education. Journal of Engineering Education, 78(7), 674-681.Hoffman, J., Johnson, C., Logg, A. (2004). Dreams of Calculus. Perspectives on Mathematics Educa-tion. http://www.bodysoulmath.org/books/dreams-of-calculus.pdf https://doi.org/10.1007/978-3-642-18586-1Stewart, J. ( 2016 ). Calculus, Eighth Edition. CengageLearning, Boston. 1545 pp.Vicéns J. L. (2012). Una modalidad de tutor-facilitador en la enseñanza de la ingeniería, en Gaviria, J. L., Palmero M. C., Alonso, P. (Eds.). Entre generaciones: Educación, herencia y promesas. Actas del XV Congreso Nacional y V Iberoamericano de Pedagogía. Ed. ICCE, Madrid, 440-449.Vicéns J.L., Zamora, B., Hervás, M. R. (2018a). Una aplicación de los estilos de aprendizaje en la Universidad Politécnica de Cartagena, en Miralles, P., Guerrero, C. (Eds.). Metodologías docentes innovadoras en la enseñanza universitaria. Editum. Murcia, 403-415.Vicéns J.L., Zamora, B., Hervás, M. R. (2018b). Un Análisis de las actitudes visuales y verbales de alumnos noveles de Grado de Ingeniería en la Universidad Politécnica de Cartagena. Libro de Ac-tas del XXVI Congreso Universitario de Innovación Educativa en las Enseñanzas Técnicas. Escuela Politécnica de Ingeniería de Gijón, 621-632

An Aza-Fused pi-Conjugated Microporous Framework Catalyzes the Production of Hydrogen Peroxide

"This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Catalysis, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/page/policy/articlesonrequest/index.html"[EN] In order to produce hydrogen peroxide in small-scale electrochemical plants, selective catalysts for the oxygen reduction reaction (ORR) toward the desired species are required. Here, we report about the synthesis, characterization, ORR electrochemical behavior, and reaction mechanism of an aza-fused pi-conjugated microporous polymer, which presents high selectivity toward hydrogen peroxide. It was synthesized by polycondensation of 1,2,4,5-benzenetetramine tetrahydrochloride and triquinoyl octahydrate. A cobalt-modified version of the material was also prepared by a simple postsynthesis treatment with a Co(II) salt. The characterization of the material is consistent with the formation of a conductive robust porous covalent laminar polyaza structure. The ORR properties of these catalysts were investigated using rotating disk and rotating disk ring arrangements. The results indicate that hydrogen peroxide is almost exclusively produced at very low overpotentials on these materials. Density functional theory calculations provide key elements to understand the reaction mechanism. It is found that, at the relevant potential for the reaction, half of the nitrogen atoms of the material would be hydrogenated. This hydrogenation process would destabilize some carbon atoms in the lattice and would provide segregated charge. On the destabilized carbon atoms, molecular oxygen would be chemisorbed with the aid of charge transferred from the hydrogenated nitrogen atoms and solvation effects. Due to the low destabilization of the carbon sites, the resulting molecular oxygen chemisorbed state, which would have the characteristics of a superoxide species, would be only slightly stable, promoting the formation of hydrogen peroxide.This work has been financially supported by the MCINN-FEDER (projects CTQ2016-76221-P, MAT2013-46753-C2-1-P, and MAT2014-52305-P) and Generalitat Valenciana (project PROMETEO/2014/013).Briega-Martos, V.; Ferre Vilaplana, A.; De La Peña, A.; Segura, J.; Zamora, F.; Feliu, J.; Herrero, E. (2017). An Aza-Fused pi-Conjugated Microporous Framework Catalyzes the Production of Hydrogen Peroxide. ACS Catalysis. 7(2):1015-1024. https://doi.org/10.1021/acscatal.6b03043S101510247

Osmotic stress tolerance in forage oat varieties (Avena Sativa L.) based on osmotic potential trials

Received: April 1st, 2022 ; Accepted: December 12th, 2022 ; Published: February 7th, 2023 ; Correspondence: [email protected]; [email protected] oats (Avena sativa L.) are globally important for milk and meat production, and, to a lesser extent, for the human diet. In Mexico, oats are a strategic crop, occupying the fourth place in cultivated area, only after maize for grain, bean, and sorghum for grain. Droughts are the main problem for oat production in Mexico. This study evaluated the germination and seedling growth of several oat varieties in response to drought stress simulated by PEG-6000 treatments of different osmotic pressure in order to identify drought-resistant genotypes. The Teporaca genotype was the most outstanding in the three levels of OP compared to its control with 0.0 of Osmotic Potential (OP). The Teporaca genotype showed the largest root length and the lowest diminishment of root length under osmotic stress conditions. This genotype also had the largest shoot length in the three osmotic stress levels. Regarding root fresh weight, Babicora stands out with 98.5% and Teporaca with 43% in the most severe level. Teporaca, Menonita, and Babicora showed the outstanding root dry weights of 346.5%, 327.2%, and 251.2%, respectively. These varieties had higher root dry weight than their own controls in water in the most severe level of OP. In conclusion, the Teporaca, Menonita, and Karma genotypes showed the highest osmotic stress tolerance and could be used as sources of favorable alleles to improve oat drought tolerance

FGF receptor genes and breast cancer susceptibility: results from the Breast Cancer Association Consortium

Background:Breast cancer is one of the most common malignancies in women. Genome-wide association studies have identified FGFR2 as a breast cancer susceptibility gene. Common variation in other fibroblast growth factor (FGF) receptors might also modify risk. We tested this hypothesis by studying genotyped single-nucleotide polymorphisms (SNPs) and imputed SNPs in FGFR1, FGFR3, FGFR4 and FGFRL1 in the Breast Cancer Association Consortium. Methods:Data were combined from 49 studies, including 53 835 cases and 50 156 controls, of which 89 050 (46 450 cases and 42 600 controls) were of European ancestry, 12 893 (6269 cases and 6624 controls) of Asian and 2048 (1116 cases and 932 controls) of African ancestry. Associations with risk of breast cancer, overall and by disease sub-type, were assessed using unconditional logistic regression. Results:Little evidence of association with breast cancer risk was observed for SNPs in the FGF receptor genes. The strongest evidence in European women was for rs743682 in FGFR3; the estimated per-allele odds ratio was 1.05 (95 confidence interval=1.02-1.09, P=0.0020), which is substantially lower than that observed for SNPs in FGFR2. Conclusion:Our results suggest that common variants in the other FGF receptors are not associated with risk of breast cancer to the degree observed for FGFR2. © 2014 Cancer Research UK

Unique clinico-biological, genetic and prognostic features of adult early T-cell precursor acute lymphoblastic leukemia

Altres ajuts: this project was supported by the Asociación Española Contra el Cáncer (project ref: GC16173697BIGA), [...], and Obra Social "La Caixa"

Anisotropic flow of charged hadrons, pions and (anti-)protons measured at high transverse momentum in Pb-Pb collisions at sNN=2.76\sqrt{s_{\rm NN}}=2.76 TeV

The elliptic, $v_2$, triangular, $v_3$, and quadrangular, $v_4$, azimuthal anisotropic flow coefficients are measured for unidentified charged particles, pions and (anti-)protons in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV with the ALICE detector at the Large Hadron Collider. Results obtained with the event plane and four-particle cumulant methods are reported for the pseudo-rapidity range $|\eta|<0.8$ at different collision centralities and as a function of transverse momentum, $p_{\rm T}$, out to $p_{\rm T}=20$ GeV/$c$. The observed non-zero elliptic and triangular flow depends only weakly on transverse momentum for $p_{\rm T}>8$ GeV/$c$. The small $p_{\rm T}$ dependence of the difference between elliptic flow results obtained from the event plane and four-particle cumulant methods suggests a common origin of flow fluctuations up to $p_{\rm T}=8$ GeV/$c$. The magnitude of the (anti-)proton elliptic and triangular flow is larger than that of pions out to at least $p_{\rm T}=8$ GeV/$c$ indicating that the particle type dependence persists out to high $p_{\rm T}$.Comment: 16 pages, 5 captioned figures, authors from page 11, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/186

Centrality dependence of charged particle production at large transverse momentum in Pb-Pb collisions at sNN=2.76\sqrt{s_{\rm{NN}}} = 2.76 TeV

The inclusive transverse momentum ($p_{\rm T}$) distributions of primary charged particles are measured in the pseudo-rapidity range $|\eta|<0.8$ as a function of event centrality in Pb-Pb collisions at $\sqrt{s_{\rm{NN}}}=2.76$ TeV with ALICE at the LHC. The data are presented in the $p_{\rm T}$ range $0.15<p_{\rm T}<50$ GeV/$c$ for nine centrality intervals from 70-80% to 0-5%. The Pb-Pb spectra are presented in terms of the nuclear modification factor $R_{\rm{AA}}$ using a pp reference spectrum measured at the same collision energy. We observe that the suppression of high-$p_{\rm T}$ particles strongly depends on event centrality. In central collisions (0-5%) the yield is most suppressed with $R_{\rm{AA}}\approx0.13$ at $p_{\rm T}=6$-7 GeV/$c$. Above $p_{\rm T}=7$ GeV/$c$, there is a significant rise in the nuclear modification factor, which reaches $R_{\rm{AA}} \approx0.4$ for $p_{\rm T}>30$ GeV/$c$. In peripheral collisions (70-80%), the suppression is weaker with $R_{\rm{AA}} \approx 0.7$ almost independently of $p_{\rm T}$. The measured nuclear modification factors are compared to other measurements and model calculations.Comment: 17 pages, 4 captioned figures, 2 tables, authors from page 12, published version, figures at http://aliceinfo.cern.ch/ArtSubmission/node/284