Leadership, self-concept and sex: a deep analysis of transformational leadership

Una parte de la investigación sobre liderazgo se ha centrado en los efectos del liderazgo transformacional (TF) y transaccional (TA) en el autoconcepto del propio líder. Esta investigación se ha focalizado esta cuestión, debido a la importancia que encierra. Si se distingue qué tipo de liderazgo conlleva poseer un autoconcepto más positivo, es decir, una mayor autoestima, podremos concluir que existe una forma de liderar que, al menos en ese aspecto, es más recomendable. Según Sosik y Cameron (2010), el líder transformacional poseerá una personalidad más ascética y una excelencia moral; y por ello, un autoconcepto más positivo. Además, también analizaremos si existe diferencia en cuanto al sexo a la hora de ejercer un tipo de liderazgo u otro; pues se espera que las mujeres tiendan a desarrollar un liderazgo más transformacional (Eagly y col., 1992). Utilizando como muestra a 56 profesores/as de secundaria de Granada procedimos a pasar una serie de instrumentos que miden el tipo de liderazgo y el autoconcepto, con el fin de poner a prueba nuestras hipótesis. Finalmente, éstas fueron contrastadas, pues se encontró una clara tendencia por parte de las mujeres al liderazgo transformacional, además de comprobar que éste conllevaba un mayor autoconcepto personal y social en las personas que lo elegían como forma de liderazgo a ejercer.Part of the research about leadership has been focused on the effects that both transformational and transactional leadership have on the leader’s self-concept. This study is focused on that question, due to the importance that it has nowadays. Thus, if we can determine which form of leadership is related to a more positive self-concept, we will be able to conclude that it actually exists a way to lead that is more advisable than others, at least in this respect. Sosik and Cameron (2010) claim that transformational leaders have a more ascetic personality and also a moral excellence, so their self-concept will be more positive. Also, we will analyze the difference between men and women when it comes to lead: we expect that women tend to develop a transformational leadership (Eagly et al., 1992). For that aim, it was drawn a sample of 56 secondary school teachers from Granada, who had to complete different tests about their form of leadership and their self-concept. We finally found that, in general, women tend to have a transformational leadership, and this kind of leadership is related to a better self-concept, both social and personal.Universidad de Granada. Departamento de Psicología Social. Proyecto de Innovación Docente ReiDoCre

Scaling of graphene field-effect transistors supported on hexagonal boron nitride: radio-frequency stability as a limiting factor

The quality of graphene in nanodevices has increased hugely thanks to the use of hexagonal boron nitride as a supporting layer. This paper studies to which extent hBN together with channel length scaling can be exploited in graphene field effect transistors (GFETs) to get a competitive radio frequency (RF) performance. Carrier mobility and saturation velocity were obtained from an ensemble Monte Carlo simulator that accounted for the relevant scattering mechanisms (intrinsic phonons, scattering with impurities and defects, etc.). This information is fed into a self consistent simulator, which solves the drift diffusion equation coupled with the two dimensional Poisson's equation to take full account of short channel effects. Simulated GFET characteristics were benchmarked against experimental data from our fabricated devices. Our simulations show that scalability is supposed to bring to RF performance an improvement that is, however, highly limited by instability. Despite the possibility of a lower performance, a careful choice of the bias point can avoid instability. Nevertheless, maximum oscillation frequencies are still achievable in the THz region for channel lengths of a few hundreds of nanometers.Comment: 29 pages, 7 figures, 1 table, Supplementary Information (10 pages) Funded by: 1 Micronova Nanofabrication Centre 2 European Union's Horizon 2020 (696656) 3 MINECO (TEC2013-42622-R, TEC2015-67462-C2-1-R, TEC2016-80839-P, MINECO/FEDER, FJCI-2014-19643) 4 MECD (CAS16/00043) 5 Generalitat de Catalunya (2014 SGR 384

Factor multiplicador completo de un sistema de un grado de libertad sometido a carga armónica

Artículo publicado en Applied Mathematics LettersThe magnification factor for the steady-state response of a SDOF system under harmonic loading is described in many structural dynamics textbooks; the well known analytical solution is easily obtained from the solution to the damped equation of motion for harmonic loading. The complete and steady state solutions can differ significantly. An analytical expression for the maximum response to the complete solution (steady state plus transient) remains elusive; however, a simple analytical expression is identified herein for the undamped case. Differences in the magnification factors obtained for both solutions are discussed.TEP-19

Factor multiplicador completo de un sistema de un grado de libertad sometido a carga armónica

Artículo publicado en Applied Mathematics LettersThe magnification factor for the steady-state response of a SDOF system under harmonic loading is described in many structural dynamics textbooks; the well known analytical solution is easily obtained from the solution to the damped equation of motion for harmonic loading. The complete and steady state solutions can differ significantly. An analytical expression for the maximum response to the complete solution (steady state plus transient) remains elusive; however, a simple analytical expression is identified herein for the undamped case. Differences in the magnification factors obtained for both solutions are discussed.TEP-19

Enhancing estimation methods for integrating probability and non-probability survey samples with machine-learning techniques. An application to a Survey on the impact of the COVID-19 pandemic in Spain

Web surveys have replaced Face-to-Face and computer assisted telephone interviewing (CATI) as the main mode of data collection in most countries. This trend was reinforced as a consequence of COVID-19 pandemic-related restrictions. However, this mode still faces significant limitations in obtaining probabilitybased samples of the general population. For this reason, most web surveys rely on nonprobability survey designs. Whereas probability-based designs continue to be the gold standard in survey sampling, nonprobability web surveys may still prove useful in some situations. For instance, when small subpopulations are the group under study and probability sampling is unlikely to meet sample size requirements, complementing a small probability sample with a larger nonprobability one may improve the efficiency of the estimates. Nonprobability samples may also be designed as a mean for compensating for known biases in probability-basedweb survey samples by purposely targeting respondent profiles that tend to be underrepresented in these surveys. This is the case in the Survey on the impact of the COVID-19 pandemic in Spain (ESPACOV) that motivates this paper. In this paper, we propose a methodology for combining probability and nonprobabilityweb-based survey sampleswith the help ofmachine-learning techniques. We then assess the efficiency of the resulting estimates by comparing them with other strategies that have been used before. Our simulation study and the application of the proposed estimation method to the second wave of the ESPACOV Survey allow us to conclude that this is the best option for reducing the biases observed in our data.The authorswould like to thank the Institute forAdvanced Social Studies at the SpanishNational Research Council (IESACSIC) for providing data and information about the Survey on the impact of the COVID-19 pandemic in Spain (ESPACOV) Survey. This study was partially supported by Ministerio de Educación y Ciencia (PID2019-106861RB-I00, Spain), IMAG-Maria de Maeztu CEX2020-001105-M/AEI/10.13039/501100011033, and FEDER/Junta de Andalucía-Consejería de Transformación Económica, Industria, Conocimiento y Universidades (FQM170-UGR20, A-SEJ-154-UGR20) and by Universidad de Granada / CBUA for open access charges

Artritis reumatoide como forma de presentación de un timoma

El timo juega un importante papel en la maduración de los linfocitos T y en la tolerancia inmune, una alteración a dicho nivel podría desencadenar una reacción de linfocitos contra antígenos propios, dando lugar a reacciones autoinmunes. Presentamos el caso de un paciente de 65 años diagnosticado hacía 4 años de artritis reumatoide seropositiva controlada con bajas dosis de corticoide que ingresó en el servicio de Medicina Interna por cuadro sincopal situacional (defecatorio) con recuperación espontánea. En las exploraciones complementarias destacaba la presencia en la radiografía de tórax de una masa mediastínica confirmada en TAC y con biopsia compatible con timoma. Tras el hallazgo casual del timoma y 2 años después de la extirpación del mismo el paciente se encuentra asintomático sin tratamiento corticoideo en lo que respecta a artritis y con negativización en controles posteriores a la cirugía de factor reumatoide y anticuerpos anticitrulinados en descens

2º Congreso Internacional de Modelos Mecánicos en Ingeniería Estructural

2nd International Congress on Mechanical Models in Structural Engineering, celebrated in 20-21 of June 2013, Granada.Grupo: Ingeniería e infraestructuras (TEP190

II Premio Nacional de educación para el desarrollo "Vicente Ferrer" 2010 : buenas prácticas

Resumen basado en el de la publicaciónLa Agencia Española de Cooperación Internacional para el Desarrollo (AECID) junto con el Ministerio de Educación convoca anualmente los premios de educación para el desarrollo que están dirigidos a todos los centros docentes españoles sostenidos con fondos públicos que impartan educación infantil, educación primaria, educación secundaria obligatoria, bachillerato y formación profesional. Se recogen las buenas prácticas de los docentes premiados en esta segunda edición. Docentes que en el ejercicio de su función educadora han convertido el proceso educativo en un proceso dinámico e interactivo que permite al alumnado desarrollar un conocimiento crítico de nuestro mundo. Profesores y profesoras que han estimulado la participación del alumnado en la construcción de estructuras sociales más justas y solidarias, y han promovido actuaciones basadas en el principio de la corresponsabilidad de todos los actores implicados.MadridBiblioteca de Educación del Ministerio de Educación, Cultura y Deporte; Calle San Agustín, 5 - 3 planta; 28014 Madrid; Tel. +34917748000; [email protected]