Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

Validation of a reduced scale to assess basic learning skills of university students

[ES] La relación entre evaluación y desarrollo de las competencias básicas para el aprendizaje del alumnado universitario es indiscutible, pues la evaluación juega un papel relevante al determinar lo que aprende el alumnado y la forma en la que realiza sus tareas académicas. Con el objetivo de contribuir en el avance de la metodología evaluativa para la valoración de dichas competencias, este estudio pretende validar una escala reducida la cual ha sido adaptada del Autoinforme de desarrollo de las competencias básicas de los estudiantes –COMPES-. Dicha escala busca medir, de forma concisa y breve, el nivel competencial percibido por parte del alumnado respecto a un conjunto de competencias básicas relacionadas con la participación del discente en la evaluación del aprendizaje. A través de un estudio de validación, a partir de las respuestas ofrecidas por una muestra de 480 estudiantes universitarios, se analiza la estructura factorial y la consistencia interna de la escala reducida. Los análisis factoriales, exploratorio y confirmatorio, así como el análisis de consistencia asociado, muestran un modelo ajustado con 14 ítems distribuidos en cuatro dimensiones: Análisis; Resolución y Argumentación Creativa; Valoración y comunicación; Evaluación como proceso de aprendizaje y Trabajo en equipo. En conclusión, se hace patente, en primer lugar, el binomio evaluación y aprendizaje universitario y, en segundo lugar, la necesidad y utilidad de contar con una escala validada y reducida de autopercepción de las competencias básicas de aprendizaje del alumnado universitario.[EN] The relationship between evaluation and development of the basic competences for the learning of the university students is indisputable, since the evaluation plays an important role in determining what the students learn and the way in which they carry out their academic tasks. With the aim of contributing to the advancement of the evaluation methodology for the assessment of these competences, this study aims to validate a small scale which has been adapted from the Self-report on the development of the basic competences of the students –COMPES-. This scale seeks to measure, in a concise and brief way, the level of competence perceived by the students with respect to a set of basic competences related to the participation of the student in the evaluation of learning. Through a validation study, based on the answers offered by a sample of 480 university students, the factorial structure and internal consistency of the reduced scale are analyzed. The factorial, exploratory and confirmatory analyses, as well as the associated consistency analysis, show an adjusted model with 14 items distributed in four dimensions: Analysis; Resolution and Creative Argumentation; Assessment and communication; Evaluation as a learning process and Teamwork. In conclusion, it becomes clear, firstly, the binomial evaluation and university learning and, secondly, the need and usefulness of having a validated and reduced scale of self-perception of the basic learning competences of university students.Chiva Sanchis, I.; Ramos Santana, G.; Moral Mora, A.; Pérez Carbonell, A. (2021). Validación de una escala reducida para valorar competencias básicas de aprendizaje del alumnado universitario. REDU. Revista de Docencia Universitaria. 19(1):129-145. https://doi.org/10.4995/redu.2021.15125OJS129145191Abal, F.J.P., Auné, S.E., Lozzia, G.S. y Attorresi, H.F. (2017). Funcionamiento de la categoría central en ítems de Confianza para la Matemática. Revista Evaluar, 17(2), 18-31. https://doi.org/10.35670/1667-4545.v17.n2.18717Albareda, S. y Gonzalvo, M. (2013). Competencias genéricas en sostenibilidad en Educación Superior. Revisión y compilación. Revista de Comunicación de la SEECI, 32, 141-159. http://dx.doi.org/10.15198/seeci.2013.32.141-159Arias, I. M. (2015). Diseño y validación de un cuestionario de escala formativa para valorar las competencias transversales de estudiantes universitarios. Una propuesta para dispositivos móviles basada en Android. [Tesis doctoral]. ]. https://doi.org/10.17345/ute.2015.1.661Baartman, L. y Ruijs, L. (2011). Comparing students' perceived and actual competence in higher vocational education. Assessment & Evaluation in Higher Education, 36(4), 385-398. https://doi.org/10.1080/02602938.2011.553274Bagozzi, R.P. y Yi, Y. (1988). On the evaluation of structural equatios models. Journal of the Academy of Marketing Science, 16 (1), 74-94. http://dx.doi.org/10.1007/BF02723327Bolívar, A. (2008). El discurso de las competencias en España: educación básica y educación superior. Red-U. Revista Electrónica de Docencia Universitari, 6 (2), 2-23. https://doi.org/10.4995/redu.2008.6268Bollen, K.A (1989). Structural equations Mth latent variables. Wiley. https://doi.org/10.1002/9781118619179Boud, D. y Molloy, E. (coord.) (2015). El feedback en educación superior y profesional. Madrid: Narcea ediciones.Browne, M.W., y Cudeck, R. (1992). Alternative Ways of Assessing Model Fit. Sociological Methods and Research, 21, 230-258. https://doi.org/10.1177/0049124192021002005Campo-Arias, A. y Oviedo, H. C. (2008). Propiedades Psicométricas de una Escala: la Consistencia Interna. Revista de Salud Pública, 10(5),831-839. https://doi.org/10.1590/S0124-00642008000500015Clemente, J.S., y Escribá C. (2013). Análisis de la percepción de las competencias genéricas adquiridas en la Universidad. Revista de Educación, 362, 535-561. https://doi.org/10.4438/1988-592X-RE-2013-362-241Días, C.B., Caro, N.P. y Gauna, E.J. (2015). Cambio en las estrategias de enseñanza-aprendizaje para la nueva Generación Z o de los "nativos digitales". Repositorio Digital. Universidad Nacional Autónoma de México. http://hdl.handle.net/20.500.12579/4134Fernández, E., Bernardo, A., Suárez, N., Cerezo, R., Núñez, J.C., y Rosario, P. (2013). Predicción del uso de estrategias de autorregulación en educación superior. Anales de Psicología, 29(3), 865-875. http://dx.doi.org/10.6018/analesps.29.3.139341Frías, D., y Pascual, M. (2012). Prácticas del Análisis Factorial Exploratorio (AFE) en la investigación sobre conducta del consumidor y marketing. Suma Psicológica, 19 (1), 47-58.Gargallo, B., Almerich, G., Suárez-Rodríguez, J.M. y García-Félix, E. (2012). Estrategias de aprendizaje en estudiantes universitarios excelentes y medios. Su evolución a lo largo del primer año de carrera. RELIEVE, 18 (2), 1-22. http://dx.doi.org/10.7203/relieve.18.2.2000Gijbels, D. (2011). Assessment of vocational competence in higher education: reflections and prospects. Assessment and Evaluation in Higher Education, 36(4), 381-383. http://dx.doi.org/10.1080/02602938.2011.581859Gómez-Ruiz, M.A., Rodríguez-Gómez, G. e Ibarra, M.S. (2013a). Desarrollo de las competencias básicas de los estudiantes de Educación Superior mediante la e-Evaluación orientada al aprendizaje. RELIEVE, 19 (1). http://dx.doi.org/10.7203/relieve.19.1.2457Gómez-Ruiz, M.A., Rodríguez-Gómez, G. e Ibarra, M.S. (2013b). COMPES: Autoinforme sobre las competencias básicas relacionadas con la evaluación de los estudiantes universitarios. Estudios sobre Educación, 24, 197-224.Henson, R.K., y Roberts, J.K. (2006). Use of Exploratory Analysis in Published Research: Common Errors and Some Comments on Improved Practice. Educational and Psychological Measurement, 66, 393-416. https://doi.org/10.1177/0013164405282485Hu, L.T., y Bentler, P.M. (1999). Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives. Structural Equation Modeling, 6, 1-55. https://doi.org/10.1080/10705519909540118JQI (Joint Quality Initiative) (2004). Shared 'Dublin' descriptors for Short Cycle, First Cycle, Second Cycle and Third Cycle Awards. https://www.aqu.cat/doc/doc_24496811_1.pdfLance, C.E., Butts, M.M., y Michels, L.C. (2006). The sources of four commonly reported cutoff criteria: what did they really say? Organizational Research Methods, 9(2), 202-220. https://doi.org/10.1177/1094428105284919Law, W., Elliot, A.J. y Murayama, K. (2012). Perceived competence modera¬tes the relation between performance-approach and performance-avoidance goals. Journal of Educational Psychology, 104(3), 806-819. https://doi.org/10.1037/a0027179Lizasoain, L., Etxeberria, J., y Lukas, J.F. (2017). Propuesta de un nuevo cuestionario de evaluación de los profesores de la Universidad del País Vasco. Estudio psicométrico, dimensional y diferencial. RELIEVE, 23(2). https://doi.org/10.7203/relieve.23.2.10436Lloret, S., Ferreres, A., Hernández-Baeza, A., y Tomás, I. (2014). El análisis factorial exploratorio de los ítems: una guía práctica, revisada y actualizada. Anales de Psicología, 30(3), 1151-1169. http://dx.doi.org/10.6018/analesps.30.3.199361Loehlin, J.C., y Beaujean, A.A. (2017). Latent variable models: An introduction to factor, path, and structural equation analysis. New York: Taylor & Francis.López Castro, M., y Pantoja, A. (2017). Escala para valorar la percepción y grado de satisfacción del profesorado de Educación Primaria de la Comunidad Autónoma de Andalucía respecto a los procesos tutoriales. Revista Complutense De Educación, 29(1), 287-306. https://doi.org/10.5209/RCED.52286Marko, I., Pikabea, I., Altuna, J., Eizagirre, A., y Perez-Sostoa, V. (2019). Propuesta para el desarrollo de competencias transversales en el Grado de Pedagogía. Un estudio de caso. Revista Complutense De Educación, 30(2), 381-398. https://doi.org/10.5209/RCED.57490Martínez-Clares, P., y González-Morga, N. (2018). Las competencias transversales en la universidad: propiedades psicométricas de un cuestionario. Educación XX1, 21(1). https://doi.org/10.5944/educxx1.20194Meroño, L., Calderón, A., Arias-Estero, J.-L., y Méndez-Giménez, A. (2017). Diseño y validación del cuestionario de percepción del profesorado de Educación Primaria sobre el aprendizaje del alumnado basado en competencias (#ICOMpri2). Revista Complutense De Educación, 29(1), 215-235. https://doi.org/10.5209/RCED.52200Moratto, N., Cárdenas, N. y Berbesí, D. (2012). Validación de un cuestionario breve para detectar intimidación escolar. Revista CES Psicología, 5(2), 70-78.National Union of Students. (2010). Charter on Assessment and Feedback.Navarro-Saldaña, G. (2017). Responsabilidad social universitaria en las universidades del siglo XXI. Conferencia realizada el 1 de febrero en la Inauguración del Programa Formación Integral del profesorado Universitario (FIPU). Universitat de València (Por Cortesía de la autora).Real Decreto 1393/2007, de 29 de octubre, por el que se establece la ordenación de las enseñanzas universitarias oficiales. (BOE de 30 de octubre).Real Decreto 1027/2011, de 15 de julio, por el que se establece el Marco Español de Cualificaciones para la Educación Superior. (BOE de 3 de agosto)Rodríguez-Espinar, S. (2015). Los estudiantes universitarios de hoy: una visión multinivel. REDU. Revista de Docencia Universitaria, 13 (2), 91-124. https://doi.org/10.4995/redu.2015.5440Rodríguez-Gómez, G., Ibarra, M.S. y Cubero, J. (2018). Competencias básicas relacionadas con la evaluación. Un estudio sobre la percepción de los estudiantes universitarios. Educación XXI, 21(1), 181-207. https://doi.org/10.5944/educxx1.20184Rodríguez-Gómez, G., Ibarra, M.S., Gallego, B., Gómez-Ruiz, M.A. y Quesada, V. (2012). La voz del estudiante en la evaluación del aprendizaje: un camino por recorrer en la universidad. RELIEVE, 18(2), 1-21. https://doi.org/10.7203/relieve.18.2.1985Segers, M. y Dochy, F. (2001). New Assessment Forms in Problem-Based Learning: The Value-Added of the Students' Perspective. Studies in Higher Education, 26(3), 327-343. https://doi.org/10.1080/03075070120076291Tabachnick, B.G., y Fidell, L.S. (2001). Using multivariate statistics. Needham Heights: Allyn & Bacon.Tanaka, J.S., y Huba, G.H. (1989). A general coefficient of determination for covariance structure models under arbitrary GLS estimation. British Journal of Mathematical and Statistical Psychology, 42, 233-239. https://doi.org/10.1111/j.2044-8317.1989.tb00912.xThomas, G., Martin, D. y Pleasants, K. (2011). Using self- and peer assessment to enhance students' future-learning in higher education. Journal of University Teaching & Learning Practice, 8(1). https://doi.org/10.1080/02602938.2015.1039484Villa, A. (2020). Aprendizaje Basado en Competencias: desarrollo e implantación en el ámbito universitario. REDU. Revista de Docencia Universitaria, 18(1), 19-46. doi:https://doi.org/10.4995/redu.2020.13015Ya-Hui, S., Li-Yia, F., Chao-Chin, Y. y Tzu-Ling, C. (2012). How teachers support university students' lifelong learning development for sustainable futures: The student's perspective. Futures, 44, 158-165. https://doi.org/10.1016/j.futures.2011.09.008Zimmerman, B.J. (2002). Becoming a Self-regulated Learner: an Overview. Theory into Practice, 41(2), 64-70. https://doi.org/10.1207/s15430421tip4102_

Search for W′→tb→qqbb decays in pp collisions at √s=8 TeV with the ATLAS detector

A search for a massive W′ gauge boson decaying to a top quark and a bottom quark is performed with the ATLAS detector in pp collisions at the LHC. The dataset was taken at a centre-of-mass energy of √s=8 TeV and corresponds to 20.3 fb−1 of integrated luminosity. This analysis is done in the hadronic decay mode of the top quark, where novel jet substructure techniques are used to identify jets from high-momentum top quarks. This allows for a search for high-mass W′ bosons in the range 1.5–3.0 TeV. b-tagging is used to identify jets originating from b-quarks. The data are consistent with Standard Model background-only expectations, and upper limits at 95 % confidence level are set on the W′→tb cross section times branching ratio ranging from 0.16pb to 0.33pb for left-handed W′ bosons, and ranging from 0.10pb to 0.21pb for W′ bosons with purely right-handed couplings. Upper limits at 95 % confidence level are set on the W′-boson coupling to tb as a function of the W′ mass using an effective field theory approach, which is independent of details of particular models predicting a W′boson

Control biológico In Vitro de nematodos agalladores (Meloidogyne sp.) a base de quitosano y fluensulfone

El nematodo agallador (Meloidogyne sp.) tiene importancia económica potencial en diversos cultivos, en su combate casi siempre se han utilizado diferentes productos de agroquímicos, por lo que se necesita evaluar nuevos productos que sean una mejor alternativa en su manejo y en el cuidado al medio ambiente. En el presente trabajo se evaluó la eficacia biológica de diferentes extractos del quitosano un biopolímero natural con efecto nematicida y regulador de poblaciones de estos fitonematodos y Fluensulfone un nematicida de amplio espectro, el estudio se realizó In vitro, se colectaron muestras de suelo y se extrajeron los nematodos mediante el método de embudo de Baermann, se colocaron en cajas petri en diluciones con 30-35 nematodos por unidad experimental, en donde para su control se utilizó quitosano extraído de langostino de rio y quitosano comercial a diferentes concentraciones (0. 25, 0.50, 0.75), así mismo un nematicida comercial con extracto de quitosano Nematrol Plus , esto comparado con otros nematicidas comerciales Ditera (Myrothecium verrucaria  ),  Nemover  (Extracto  de  pino)  y  Nimitz  (Fluensulfone)  .Se  encontró  que  el  efecto nematicida del quitosano en dosis media (0.50) fue mejor posterior a las 24 horas después de la aplicación con una mortalidad de 95.83 a 100 % de nematodos,  y una eficacia del 100 %, esto comparado con los nematicidas comerciales

Evaluating adaptive strategies for Mediterranean agriculture: a participatory approach in the Arroyo de la Balisa Sub-basin (Segovia, Spain)

Climate change is already exacerbating water scarcity issues, particularly in vulnerable regions such as the Mediterranean. In this context, agricultural adaptation measures are essential to ensure food security and sustainable agriculture. This research focuses on the prioritization and socioeconomic assessment of adaptation strategies for agriculture in the Arroyo de la Balisa sub-basin (Segovia, Spain). A participatory multi-criteria approach was conducted with 41 local stakeholders, including public administration, agronomic engineering companies, farmers, livestock producers, environmentalists, and experts, who ranked 14 adaptation measures under current and future scenarios. Subsequently, a structured questionnaire collected detailed insights from local farmers regarding socioeconomic impacts and implementation barriers for the eight prioritized measures. Key findings indicate that, despite their considerable potential benefits, irrigation-related measures such as modernization and expansion are hindered by high costs and significant implementation barriers. Conversely, cover crops for woody crops and crop rotation with soil-improving species emerged as the most feasible options due to balanced cost-benefit perceptions among farmers. The participatory approach adopted, involving active validation by local actors, provided context-specific insights and enhanced the practical relevance and acceptance of results, facilitating targeted policy interventions to foster climate resilience in Mediterranean agriculture

Search for black holes and other new phenomena in high-multiplicity final states in proton-proton collisions at root s=13 TeV

Peer reviewe

Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks

Peer reviewe

Search for high-mass diphoton resonances in proton-proton collisions at 13 TeV and combination with 8 TeV search

Peer reviewe

A search for prompt lepton-jets in pp collisions at root s=8 TeV with the ATLAS detector

A search is presented for a new, light boson with a mass of about 1 GeV and decaying promptly to jets of collimated electrons and/or muons (lepton-jets). The analysis is performed with 20.3 fb−1 of data collected by the ATLAS detector at the Large Hadron Collider in proton-proton collisions at a centre-of-mass energy of 8 TeV. Events are required to contain at least two lepton-jets. This study finds no statistically significant deviation from predictions of the Standard Model and places 95% confidence-level upper limits on the contribution of new phenomena beyond the SM, incuding SUSY-portal and Higgs-portal models, on the number of events with lepton-jets.We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; IN2P3-CNRS, CEADSM/IRFU, France; GNSF, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZ. S, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, FP7, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex and Idex, ANR, Region Auvergne and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; the Royal Society and Leverhulme Trust, United Kingdom

Search for the production of single vector-like and excited quarks in the Wt final state in pp collisions at √s=8 TeV with the ATLAS detector

A search for vector-like quarks and excited quarks in events containing a top quark and a W boson in the final state is reported here. The search is based on 20.3 fb−1 of proton-proton collision data taken at the LHC at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector. Events with one or two leptons, and one, two or three jets are selected with the additional requirement that at least one jet contains a b-quark. Single-lepton events are also required to contain at least one large-radius jet from the hadronic decay of a high-pTW boson or a top quark. No significant excess over the expected background is observed and upper limits on the cross-section times branching ratio for different vector-like quark and excited-quark model masses are derived. For the excited-quark production and decay to Wt with unit couplings, quarks with masses below 1500 GeV are excluded and coupling-dependent limits are set