Determinación de la composición química de piezas metálicas históricas: aplicación a un bronce romano

La deicrniinación de la composición química media de un bronce arqueoló gico no siempre es fácil. Algunos problemas a resolver son la heterogeneidad de la composición química, la dificultad de extracción de muestras o la importan cia de los elementos traza. En la comunicación se discute en primer lugar la me todología y técnicas de análisis apropiadas para la determinación de la compo sición de bronces singulares. Por último, se describe un procedimiento de obtención de viruta, cuasi no destructivo, para realizar análisis por procedimientos con vencionales. La validez y el significado de los resultados se discuten mediante la aplicación del procedimiento a un bronce de origen romano: el Hypnos ha llado en la villa romana de El Ruedo, en Almedinilla (Córdoba)

Effects of Cryogenic Aging on a Rapid Prototyped (RP) Polymer

Little research has been done on the post-processing (aging) of rapid prototyped (RP) polymers at temperatures below 123K (–238˚F). Test specimens of RP thermosetting resin (DSM-Somos 8110) were fabricated and cryogenically aged from 10-25 hours. The tensile strength and impact toughness were measured. This work will study the effect of cryogenic aging on yield strength of Somos 8110. This paper will also discuss our interpretation of the data based on fractography.The work was funded by an NSF Grant under Research Experiences for Undergraduates (REU).Mechanical Engineerin

Determinación de la composición química de piezas metálicas históricas: aplicación a un bronce romano

La determinación de la composición química media de un bronce arqueológico no siempre es fácil. Algunos problemas a resolver son la heterogeneidad de la composición química, la dificultad de extracción de muestras o la importancia de los elementos traza. En la comunicación se discute en primer lugar la metodología y técnicas de análisis apropiadas para la determinación de la composición de bronces singulares. Por último, se describe un procedimiento de obtención de viruta, cuasi no destructivo, para realizar análisis por procedimientos convencionales. La validez y el significado de los resultados se discuten mediante la aplicación del procedimiento a un bronce de origen romano: el Hypnos hallado en la villa romana de El Ruedo, en Almedinilla (Córdoba)

Aligning the principles of assessment for learning to learning in physical education: a review of literature

peer-reviewedThe full text of this article will not be available in ULIR until the embargo expires on the 19/04/2022Background: A comprehensive international literature review on alternative assessment in physical education has been provided by López-Pastor et al. ([2013]. “Alternative Assessment in Physical Education: A Review of International Literature.” Sport, Education & Society 18 (1): 57–76). The authors remarked that while more authentic forms of assessment in physical education have been evidenced over the last three decades, the extent to which alternative assessment practices have become common practice in the teaching of physical education is yet to be established. Purpose: This review provides an updated perspective on the prevalence of assessment for learning (AfL) principles in physical education discourse since the 2013 publication. The intent is to inform and consider future AfL practices in school physical education and physical education teacher education (PETE) programmes. Methods: Eligibility criteria for the review required full-text articles written in English or Spanish; published (open access and/or in print) in peer-reviewed, academic and professional journals; and limited to the period 2013–2019. Inclusion criteria required articles to report assessment being used to promote learning in physical education, regardless of making reference to ‘assessment for learning’. Findings: Fifty-two articles met the inclusion criteria. A thematic analysis of these articles resulted in four themes: i) traditional positioning of assessment in physical education; ii) AfL and physical education; iii) the constraints in enacting AfL in physical education; and iv) how to most effectively embed AfL in daily physical education practices. Conclusions: The main conclusions of this review are that i) AfL is a learning-oriented assessment based on socio constructivist theories and integrated into the teaching-learning process, ii) physical education teachers continue to use assessment solely to grade students; iii) physical education teachers do not have the necessary skillset to use AfL in physical education successfully; iv) physical education teachers need to be supported to implement AfL; and v) it is necessary to consider how best PETE programmes can infuse AfL across the programme

The little skate genome and the evolutionary emergence of wing-like fins

Skates are cartilaginous fish whose body plan features enlarged wing-like pectoral fins, enabling them to thrive in benthic environments1,2. However, the molecular underpinnings of this unique trait remain unclear. Here we investigate the origin of this phenotypic innovation by developing the little skate Leucoraja erinacea as a genomically enabled model. Analysis of a high-quality chromosome-scale genome sequence for the little skate shows that it preserves many ancestral jawed vertebrate features compared with other sequenced genomes, including numerous ancient microchromosomes. Combining genome comparisons with extensive regulatory datasets in developing fins—including gene expression, chromatin occupancy and three-dimensional conformation—we find skate-specific genomic rearrangements that alter the three-dimensional regulatory landscape of genes that are involved in the planar cell polarity pathway. Functional inhibition of planar cell polarity signalling resulted in a reduction in anterior fin size, confirming that this pathway is a major contributor to batoid fin morphology. We also identified a fin-specific enhancer that interacts with several hoxa genes, consistent with the redeployment of hox gene expression in anterior pectoral fins, and confirmed its potential to activate transcription in the anterior fin using zebrafish reporter assays. Our findings underscore the central role of genome reorganization and regulatory variation in the evolution of phenotypes, shedding light on the molecular origin of an enigmatic trait

Innovación y estrategias de intervención en acoso escolar

Los problemas de convivencia escolar, violencia escolar, bullying y cyberbullying, en los centros españoles son una realidad y, por tanto, es necesario que los futuros docentes cuenten con estrategias específicas para el abordaje de estas situaciones cuando se enfrenten a la realidad de las aulas. En este manual, profesionales del área de la convivencia escolar presentan las actuaciones, programas y herramientas disponibles que en estos momentos se están poniendo en práctica en los centros escolares con resultados positivos. Así, se pretende ampliar el conocimiento teórico-práctico en el ámbito de la convivencia, gestión de conflictos y violencia escolar.EducaciónPsicologí

The little skate genome and the evolutionary emergence of wing-like fin appendages

Skates are cartilaginous fish whose novel body plan features remarkably enlarged wing-like pectoral fins that allow them to thrive in benthic environments. The molecular underpinnings of this unique trait, however, remain elusive. Here we investigate the origin of this phenotypic innovation by developing the little skate Leucoraja erinacea as a genomically enabled model. Analysis of a high-quality chromosome-scale genome sequence for the little skate shows that it preserves many ancestral jawed vertebrate features compared with other sequenced genomes, including numerous ancient microchromosomes. Combining genome comparisons with extensive regulatory datasets in developing fins (gene expression, chromatin occupancy and three-dimensional (3D) conformation) we find skate-specific genomic rearrangements that alter the 3D regulatory landscape of genes involved in the planar cell polarity (PCP) pathway. Functional inhibition of PCP signaling resulted in marked reduction of anterior fin size, confirming this pathway as a major contributor of batoid fin morphology. We also identified a fin-specific enhancer that interacts with 3' HOX genes, consistent with the redeployment of Hox gene expression in anterior pectoral fins, and confirmed the potential of this element to activate transcription in the anterior fin using zebrafish reporter assays. Our findings underscore the central role of genome reorganizations and regulatory variation in the evolution of phenotypes, shedding light on the molecular origin of an enigmatic trait

Promoción de la salud y entornos saludables

A forestar forestalAplicación de un programa educativo participativo en salud  bucal a una comunidad de adultos mayoresBiblioteca móvil y su implementación en el hospital Padre HurtadoConsumo de riesgo de alcohol en Chile: una propuesta innovadora de intervenciónDiseño de un programa interactivo de promoción de la salud vocal para NB1Encuentro formativo en promoción de salud y gestión de entornos saludables para TenoExperiencia docente: programa intersectorial de promoción/prevención en preescolares de comunas vulnerables, Región MetropolitanaFiltrado glomerular, método preventivo aparición de fibrosis sistémica nefrogénica por gadolinio en examen de RMImplementación de consejerías en vida sana en APS, Región de los RíosMedicina preventiva en feria libre de la población San Gregorio: Cecof San Gregorio, Contagiando SaludMetodología innovadora en la enseñanza de una ectoparasitosisPrevención de accidentes por monóxido de carbono en edificios, Providencia 2002-2009Programa de promoción y prevención en salud bucal para preescolaresPromoviendo hábitos saludables en los vecinos de Reñaca Alto, Viña del Mar, 2009Rol de la capacitación en la implementación de acciones para la prevención de la obesidadSatisfacción usuaria en el Cesfam Natales a un año de su funcionamientoTres estrategias publicitarias y de comunicación aplicadas al consumo de alcohol de bajo riesgoTropa de la salud: uso de los medios como forma de promover la salu

Overview of recent TJ-II stellarator results

The main results obtained in the TJ-II stellarator in the last two years are reported. The most important topics investigated have been modelling and validation of impurity transport, validation of gyrokinetic simulations, turbulence characterisation, effect of magnetic configuration on transport, fuelling with pellet injection, fast particles and liquid metal plasma facing components. As regards impurity transport research, a number of working lines exploring several recently discovered effects have been developed: the effect of tangential drifts on stellarator neoclassical transport, the impurity flux driven by electric fields tangent to magnetic surfaces and attempts of experimental validation with Doppler reflectometry of the variation of the radial electric field on the flux surface. Concerning gyrokinetic simulations, two validation activities have been performed, the comparison with measurements of zonal flow relaxation in pellet-induced fast transients and the comparison with experimental poloidal variation of fluctuations amplitude. The impact of radial electric fields on turbulence spreading in the edge and scrape-off layer has been also experimentally characterized using a 2D Langmuir probe array. Another remarkable piece of work has been the investigation of the radial propagation of small temperature perturbations using transfer entropy. Research on the physics and modelling of plasma core fuelling with pellet and tracer-encapsulated solid-pellet injection has produced also relevant results. Neutral beam injection driven Alfvénic activity and its possible control by electron cyclotron current drive has been examined as well in TJ-II. Finally, recent results on alternative plasma facing components based on liquid metals are also presentedThis work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under Grant Agreement No. 633053. It has been partially funded by the Ministerio de Ciencia, Inovación y Universidades of Spain under projects ENE2013-48109-P, ENE2015-70142-P and FIS2017-88892-P. It has also received funds from the Spanish Government via mobility grant PRX17/00425. The authors thankfully acknowledge the computer resources at MareNostrum and the technical support provided by the Barcelona S.C. It has been supported as well by The Science and Technology Center in Ukraine (STCU), Project P-507F

PDZ domains and their binding partners: structure, specificity, and modification

PDZ domains are abundant protein interaction modules that often recognize short amino acid motifs at the C-termini of target proteins. They regulate multiple biological processes such as transport, ion channel signaling, and other signal transduction systems. This review discusses the structural characterization of PDZ domains and the use of recently emerging technologies such as proteomic arrays and peptide libraries to study the binding properties of PDZ-mediated interactions. Regulatory mechanisms responsible for PDZ-mediated interactions, such as phosphorylation in the PDZ ligands or PDZ domains, are also discussed. A better understanding of PDZ protein-protein interaction networks and regulatory mechanisms will improve our knowledge of many cellular and biological processes