The challenges in the selection and recruitment to school headteachers in the Spanish Educational System

Currently, the low number of candidates and the complex formation of the teams are great problems in the occupation of the school leadership position. This qualitative study aims to identify the main difficulties experienced from the perspective of the candidates. Based on the data obtained in various interviews, it should be noted how the headteacher selection process is influenced by different variables, both contextual and personal. The variables that condition this process include complexity of the decision to be a candidate or accept the appointment and the difficulty of forming and a team, among others

Links between ease of use, perceived usefulness and attitudes towards technology in older people in university: A structural equation modelling approach

Technological resources have the potential to improve the quality of life in a context in which social pressure for the use of these tools is increasing. In this sense, the adoption of technological resources by the elderly is a highly complex issue because numerous and varied factors are involved. Precisely for this reason, this study aims to analyze the effects that exist between a series of dimensions related to the perception of older people regarding the ease of use, the perceived usefulness of technological tools, attitudes towards technology and their intention to use them in everyday life. To do this, 415 adults (M = 66.27 years) enrolled in a program at the University of Experience in the Spanish context completed an online questionnaire. The application of a Structural Equations Model for data analysis highlights that the perceived ease of use of the technology has a positive effect on the perceived usefulness of these resources. Similarly, an indirect effect of the perceived usefulness of technology on the intention to use these resources is observed through the manifestation of positive attitudes towards the use of digital tools

Critical thinking and inclusive practice: A qualitative study of spanish primary school teachers’ perceptions

As one of the most necessary skills of the 21st century for problem solving, critical thinking should be taught and included in the curriculum of those schools in which inclusivity towards all their students is a priority. From this perspective, this study presents the educational implications for the teaching and evaluation of this skill. In addition, teachers' perceptions regarding the teaching methods used, evaluation techniques and limitations that they encounter at the moment of enhancing the critical thinking of their students are analysed. A descriptive-comprehensive research with a qualitative approach was adopted, with data collected from interviews with 10 primary education teachers in the Spanish educational system. The analysis suggests that, although there is some knowledge on the part of teachers about critical thinking skills, most of them are not able to respond to this learning need. They highlight the technique of joint discussion and interactions between teams as among the effective tools for fostering critical thinking skills. Notably, these teachers have referred to the existence of certain relationships between critical thinking and equitable and quality education

Econometric analysis of the industrial growth determinants in Colombia

An econometric study is carried out using a panel data model with fixed effects to identify the industrial development determinants in Colombia during the term 2005–2015. The database used in the study corresponds to World Bank and the Colombian state. The determinants of industrial growth identified at the theoretical level that allow the enhancement of productive capacities to face foreign competition in Colombia are: innovation; networks of innovations and knowledge among companies and organizations; the interest rate; the capital-product ratio, the unit labor cost; and the exchange rate. The amount invested in scientific, technological and innovation activities by industrial group is the only variable that is not significant in the model

Carcinoma de células escamosas de la piel infiltrando hueso. Presentación de un caso

Introduction: the squamous or epidermoid cell carcinoma is the second most common ¨non- melanoma¨ tumor in the skin areas exposed to sunlight, and it is more common in older people. Its incidence is higher in men, but it can be seen in both sexes. Case presentation: a 57-year-old female patient, native, with a clinical antecedent of a "removed" lesion in her right leg about 30 years ago in a private hospital, without specifying its anatomopathological result. She went to the Emergency Service at the National Regional Hospital in Escuintla, Guatemala, because four months ago she began with a small ulcerated injure in the same leg, and as she reported, in the "same place", which was initially treated with "home remedies", without specifying which ones, but the injure did not get better, otherwise it began to grow in an exophytic way and became secondarily infected. It was decided then to hospitalize the patient in the Surgery Service of Women for the study and later treatment. It was performed a skin biopsy to obtain an accurate diagnosis, the anatomopathological diagnosis confirmed the existence of a squamous cell carcinoma, well differentiated and infiltrating of the skin. It was decided then to consult and send the case to Roosevelt Hospital in Guatemala to be consulted with a surgeon specialist in oncology.Discussion: the epidermoid carcinoma, also known as spinocellular carcinoma is the second most common "non-melanoma" skin cancer, preceded by basal cell carcinoma; it is derived from alterations in the epidermis, specifically of keratinocytes.Conclusion: the squamous (epidermoid) cell carcinoma arises from alterations in epidermal keratinocytes and it can infiltrate bone structures.Introducción: el carcinoma de células escamosas o “epidermoide” como también se le denomina, es el segundo tumor “no melanoma” más frecuente de la piel de las zonas expuestas a los rayos solares y es más común en las personas mayores. Tiene mayor incidencia en los hombres, aunque pueden ser vistos en ambos sexos.Presentación de caso: paciente de sexo femenino, 57 años de edad, raza indígena, con antecedentes de habérsele “removido” hace aproximadamente 30 años una lesión en la pierna derecha, en un Sanatorio Privado no precisando el resultado anatomopatológico de la misma. Acude a emergencias del Hospital Nacional Regional de Escuintla, (HNRE), Guatemala, porque desde hace aproximadamente 4 meses comenzó con una lesión, ulcerada, pequeña en la misma pierna y según refiere la paciente en el “mismo lugar”, que se trató inicialmente con “remedios caseros”, sin precisar cuáles, pero que no mejoró, al contrario comenzó a crecer de forma exofítica y a infectarse secundariamente. Se decide ingresar en el Servicio de Cirugía de Mujeres para estudio y posterior tratamiento. Se realiza biopsia de piel para un diagnóstico certero, el diagnóstico anatomopatológico confirma la existencia de un carcinoma de células escamosas bien diferenciado e infiltrante de piel, se toma la conducta de consultar y remitir el caso para el Hospital Roosevelt de Ciudad de Guatemala para ser interconsultado con un especialista cirujano oncólogo.Discusión: el carcinoma epidermoide o también conocido como carcinoma espinocelular, es el segundo cáncer de piel “no melanoma” más frecuente, siendo precedido por el carcinoma de células basales, el mismo se deriva de alteraciones a nivel de la epidermis específicamente de los queratinocitos.Conclusión: el carcinoma de células escamosas (epidermoide) surge por alteraciones de queratinocitos de la epidermis y es capaz de infiltrar estructuras óseas.

Characterisation of Medipix3 Silicon Detectors in a Charged-Particle Beam

While designed primarily for X-ray imaging applications, the Medipix3 ASIC can also be used for charged-particle tracking. In this work, results from a beam test at the CERN SPS with irradiated and non-irradiated sensors are presented and shown to be in agreement with simulation, demonstrating the suitability of the Medipix3 ASIC as a tool for characterising pixel sensors.Comment: 16 pages, 13 figure

Causas que afectan la producción en una unidad empresarial de base porcina camagüeyana, categorías implicadas

Background: pig production systems are exposed to economic losses from various diseases and health culls. Objective. Establish the order of participation of some causes of mortality in the Business Unit of Mixed Porcine Base, as well as the categories most involved. Methods: official information on economic losses due to mortality due to: enteropathies, respiratory diseases, health sacrifices and other causes was compiled in the categories of offspring, pre-fattening and fattening during the five-year period 2012-2016. From it, a linear regression was performed without error to establish the hierarchical relationship between causes of mortality using standardized coefficients (β) and an ANOVA, with Duncan's multiple comparison test, for the degree of affectation of the categories under study. Results: losses due to mortality amounted to 113 215.94 CUP; Its causes, all with significant impact, followed a descending order headed by enteropathies, and followed by respiratory diseases, health sacrifices and others. The most affected categories were young and pre-fattening. The prophylactic use of antibiotics prescribed for these rearing stays does not meet the expected effect. Conclusions: enteropathies, respiratory diseases, health slaughter and other causes had a significant influence on the mortality of pigs and pre-fattening pigs. The prophylactic use of antibiotics prescribed for these rearing stays does not meet the expected effect. Key words:  enteric disease, respiratory infection, porcine livestock, sanitary sacrifice (Source: MeSH)Antecedentes: los sistemas de producción de cerdos están expuestos a pérdidas económicas por enfermedades diversas y sacrificios sanitarios. Objetivo. Establecer el orden de participación de algunas causas de mortalidad en la Unidad Empresarial de Base Mixta Porcina, así como las categorías más implicadas. Método: se recopiló la información oficial relativa a pérdidas económicas debidas a mortalidad por: enteropatías, enfermedades respiratorias, sacrificios sanitarios y otras causas en las categorías crías, precebas y cebas durante el quinquenio 2012-2016. A partir de la misma se realizó una regresión lineal sin error para, mediante los coeficientes estandarizados (β), establecer la relación de jerarquía entre las causas de mortalidad y un ANOVA, con prueba de comparación múltiple de Duncan, para el grado de afectación de las categorías en estudio. Resultados: las pérdidas por concepto de mortalidad ascendieron a 113 215,94 CUP; sus causas, todas con impacto significativo, siguieron un orden descendente encabezado por enteropatías, y seguidas de enfermedades respiratorias, sacrificios sanitarios y otras. Las categorías más afectadas fueron crías y precebas. El uso profiláctico de antibióticos normados para estas estadías de crianza no cumple el efecto previsto. Conclusiones: las enteropatías, enfermedades respiratorias, sacrificios sanitarios y otras causas influyeron significativamente en las mortalidades de crías y precebas porcinas. El uso profiláctico de antibióticos normados para estas estadías de crianza no cumple el efecto previsto. Palabras clave: enfermedades respiratorias, enteropatías, porcicultura, sacrificio sanitario (Fuente: MeSH

Analysis of age-related left ventricular collagen remodeling in living donors: Implications in arrhythmogenesis

Age-related fibrosis in the left ventricle (LV) has been mainly studied in animals by assessing collagen content. Using second-harmonic generation microscopy and image processing, we evaluated amount, aggregation and spatial distribution of LV collagen in young to old pigs, and middle-age and elder living donors. All collagen features increased when comparing adult and old pigs with young ones, but not when comparing adult with old pigs or middle-age with elder individuals. Remarkably, all collagen parameters strongly correlated with lipofuscin, a biological age marker, in humans. By building patient-specific models of human ventricular tissue electrophysiology, we confirmed that amount and organization of fibrosis modulated arrhythmia vulnerability, and that distribution should be accounted for arrhythmia risk assessment. In conclusion, we characterize the age-associated changes in LV collagen and its potential implications for ventricular arrhythmia development. Consistency between pig and human results substantiate the pig as a relevant model of age-related LV collagen dynamics. © 2022 The Author(s

Observation of two new Ξb−\Xi_b^- baryon resonances

Two structures are observed close to the kinematic threshold in the $\Xi_b^0 \pi^-$ mass spectrum in a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb$^{-1}$ recorded by the LHCb experiment. In the quark model, two baryonic resonances with quark content $bds$ are expected in this mass region: the spin-parity $J^P = \frac{1}{2}^+$ and $J^P=\frac{3}{2}^+$ states, denoted $\Xi_b^{\prime -}$ and $\Xi_b^{*-}$. Interpreting the structures as these resonances, we measure the mass differences and the width of the heavier state to be $m(\Xi_b^{\prime -}) - m(\Xi_b^0) - m(\pi^{-}) = 3.653 \pm 0.018 \pm 0.006$ MeV$/c^2$, $m(\Xi_b^{*-}) - m(\Xi_b^0) - m(\pi^{-}) = 23.96 \pm 0.12 \pm 0.06$ MeV$/c^2$, $\Gamma(\Xi_b^{*-}) = 1.65 \pm 0.31 \pm 0.10$ MeV, where the first and second uncertainties are statistical and systematic, respectively. The width of the lighter state is consistent with zero, and we place an upper limit of $\Gamma(\Xi_b^{\prime -}) < 0.08$ MeV at 95% confidence level. Relative production rates of these states are also reported.Comment: 17 pages, 2 figure