1,018 research outputs found
Analysis of the Narratives with Characters That Make Ethnic Diversity Visible¿ Miraculous: Tales of Ladybug & Cat Noir
This study follows the line of different authors who examined the visibility of ethnic diversity in children's television series and the psychoeducational implications of these media narratives for children. Specifically, this work analyses the behaviours/actions developed by the model characters of cultural diversity and how these characters promote a perspective on diversity that conditions children. Employing a qualitative methodology, we use content analysis and critical discourse analysis as tools to be able to read, describe and interpret said content. The results highlight that these children's programmes present a culture that reinforces certain values and behaviours. Likewise, the TV programmes analysed present stories marked by models of cultural diversity that contribute to the maintenance of certain social structures and the normalisation of inequality. We believe that educational institutions, through media education, should go deeper and teach students to look critically, deciphering codes of the audiovisual language present in the elements of children's stories. In the complex society of the 21st century, we must consider that the needs of children change depending on how their identity intersects with aspects such as ethnicity, class, gender, etc., in order to equip them with the appropriate tools to deal with these problems. Keywords: digital narratives; cultural diversity; media literac
Role of masonry fabric subsurface moisture on biocolonisation. A case study
High moisture is one of the main factors favouring the growth of algae and other organisms on stone surfaces. However, little is known about the specific effects of subsurface moisture on this process. Some regions will be exposed to longer periods of humidity and rainfall as a result of climate change. Understanding the role and internal dynamics of moisture in stone is therefore essential to enable development of mechanisms for controlling biological colonisation and thus preventing biodeterioration. The present case study is a preliminary investigation of the role of subsurface moisture in the biocolonisation process and was conducted on the walls of the Guard House of Stirling Castle. Moisture was measured at depth (up to 3, 11 and 30 cm) in both interior and exterior walls of the building with a portable device based on non-destructive microwave technology. Data were analysed in relation to the orientation of the walls, type of stone and biocolonisation. The subsurface moisture between 3 and 11 cm was found to play an important role in supporting colonising organisms on the building by modulating bioreceptivityThis study was partly financed through project CGL2016-79778-R (AEI/FEDER, UE) and Xunta de Galicia (ED431 2018/32). E. Fuentes was financially supported by a PhD Fellowship-Contract MICINN-FPI (BES-2017-079927)S
Friedel Oscillations in Relativistic Nuclear Matter
We calculate the low-momentum N-N effective potential obtained in the OBE
approximation, inside a nuclear plasma at finite temperature, as described by
the relativistic - model. We analyze the screening effects
on the attractive part of the potential in the intermediate range as density or
temperature increase. In the long range the potential shows Friedel-like
oscillations instead of the usual exponential damping. These oscillations arise
from the sharp edge of the Fermi surface and should be encountered in any
realistic model of nuclear matter.Comment: 11 pages in preprint format, typeset using REVTEX, 3 included figures
in tar, compressed, uuencoded forma
Antiangiogenic Therapy in Epithelial Ovarian Cancer
Approximately 75% of women with ovarian cancer are diagnosed at advanced stages (FIGO stage III/IV), with 15-23 months median global survival and 20% 5-year survival. Angiogenesis plays an important role in tumour development and proliferation. Increased angiogenesis is associated with worse clinical outcome in ovarian cancer. Here we review the play of bevacizumab in the treatment of ovarian cancer and also other antiangiogenic drugs. In total, to date there are no promising results for most of the reviewed antiangiogenic agents, except those already known for bevacizumab, trebananib, pazopanib, cediranib and nintedanib. Ongoing research will shed more light on this fascinating tumour process and its control
Genetic variability and phylogenetic relationships of the autochthonous horse breed for meat production based on mitochondrial DNA
Publicado en el año 2008 en: Revista ITEA, 104 (2), 283-289. http://www.aida-itea.org/index.php/revista/contenidos?idArt=85&lang=esp
Webs desde donde descargar las ponencias: http://acteon.webs.upv.es/
Web del congreso:
http://www.uco.es/genetica/MERAGEM/xivreunion.htmSe han estudiado la variabilidad y relaciones genéticas de las cuatro poblaciones equinas de aptitud cárnica
de España de protección especial (41 muestras) (Burguete (BUR): 10, Jaca Navarra (JAC): 11, Hispano
Bretón (HB): 10 y Agrupación Hipermétrica del Pirineo (AHP): 10) a través del estudio del ADN mitocondrial
(ADNmt). Se han encontrado 15 haplotipos en las 4 razas analizadas determinados por la
existencia de 19 posiciones polimórficas de las cuales 18 han sido posiciones informativas parsimoniosas
y 1 no informativa (singleton). La diversidad haplotípica (Hd) ha oscilado entre 0,758 del AHP y 0,993 del
BUR siendo el valor medio de todas las razas de de 0,929 (SD = 0,016). La raza JAC ha presentado el
mayor valor de diversidad nucleotídica (0,023). Casi la totalidad de los haplotipos encontrados los han
compartido las razas analizadas excepto el haplotipo 8 que sólo lo ha presentado la AHP, el haplotipo 10
la raza BUR, los haplotipos 13 y 14 el HB y el haplotipo 15 la raza JAC. No se ha encontrado un agrupamiento
claro de las poblaciones analizadas, lo que confirma los múltiples orígenes maternos previamente
indicado por varios autores. No obstante, al haberse encontrado haplotipos específicos en las 4 poblaciones
analizadas se deben tenerlos en cuenta a la hora de llevar a cabo los planes de conservación.Genetic variability and phylogenetic relationships of the autochthonous horse breed for meat production based on mitochondrial DNA We have studied the genetic variability and relationships of four endangered Spanish equine populations for meat production using mitochondrial DNA (mtDNA) (41 horses, 30 of them belong to Burguete (BUR), Hispano Bretón (HB) and Agrupación Hipermétrica del Pirineo (AHP) populations and the other 11 samples belong to Jaca Navarra (JAC) breed. Fifteen haplotypes were found and 19 polomorphic sites were detected, eighteen of them were parsimony informative sites and the other one was a singleton. Haplotipic diversity (Hd) ranged from 0.758 of AHP to 0.993 of BUR breed. The average Hd value was 0.929 (SD = 0.016). The JAC breed presented the highest nucleotide diversity value (0.023). Most of haplotypes found have been shared by the four horse populations except haplotype 8 that only was presented by AHP populaton, haplotype 10 by BUR, the haplotypes 13 and 14 by HB and haplotype 15 by JAC breed. A clear group of horses belong to the same population were not shown. These results confirm the multiple maternal origin previously shown by other authors. However we have found haplotypes specific of each breed that is important to take in account in their conservation programmes
Classical Cepheids: Yet another version of the Baade-Becker-Wesselink method
We propose a new version of the Baade--Becker--Wesselink technique, which
allows one to independently determine the colour excess and the intrinsic
colour of a radially pulsating star, in addition to its radius, luminosity, and
distance. It is considered to be a generalization of the Balona approach. The
method also allows the function F(CI) = BC + 10 log (Teff) for the class of
pulsating stars considered to be calibrated. We apply this technique to a
number of classical Cepheids with very accurate light and radial-velocity
curves and with bona fide membership in open clusters (SZ Tau, CF Cas, U Sgr,
DL Cas, GY Sge), and find the results to agree well with the reddening
estimates of the host open clusters. The new technique can also be applied to
other pulsating variables, e.g. RR Lyrae and RV Tauri.Comment: 6 pages, 2 figures, 1 table; Submitted to Astrophysical Bulletin,
201
Aplicación de las Nuevas Tecnologías GPS-GPRS para el estudio del comportamiento y mejora de la producción de la raza de lidia
La dehesa es un ecosistema agroforestal único que aúna un óptimo rendimiento
económico con una menor incidencia en el medio. En la Península
Ibérica hay unas 500.000 hectáreas de dehesas concentradas en Andalucía,
Castilla y León, Extremadura, Castilla La Mancha y Madrid.
La raza de Lidia es, dentro de las razas autóctonas, por su rusticidad y
adaptación, una de las que mejor aprovechan y conservan la dehesa. Las
condiciones de cría en grandes fincas (400-500 hectáreas de media), el
espacio por cabeza (entre una y seis hectáreas por animal), la movilidad que
le da su menor tamaño con respecto a otras razas y su crecimiento en libertad
con mínima presencia humana la ha hecho indispensables para el mantenimiento
del ecosistema de la dehesa.
Con este trabajo pretendemos aplicar una tecnología innovadora como es
el GPS-GPRS a la monitorización de la etología del ganado de la raza de Lidia durante todos los periodos de su vida y especialmente en aquellos momentos
en los que el animal se ve sometido a diferentes prácticas de manejo.
Para ello, se implementará la tecnología de GPS que permite el posicionamiento
relativo de un objetivo mediante la captación de la señal de diferentes
satélites específicos, lo que proporcionará información precisa sobre: el
desplazamiento del ganado en un periodo determinado, las distancias recorridas,
el territorio pastoreado, las áreas más querenciosas, su ritmo circadiano,
las pautas de comportamiento, etc. Así mismo, el dispositivo incorporará
sensores de parámetros biológicos como la temperatura ó el ritmo
cardíaco, etc. La implementación de este sistema permitirá, a través del
posicionamiento, realizar la óptima gestión de los recursos pastables de la
dehesa, permitiendo ahorrar costes en alimentación, infraestructuras y personal,
y ofrecer, en un futuro cercano, una atractiva herramienta al ganadero
para realizar el control remoto de sus reses
Mecanismos que controlan la velocidad de los deslizamientos
Los deslizamientos activos a menudo mantienen velocidades lentas o moderadas (del orden de mm/día o cm/día) durante un largo periodo de tiempo. Las variaciones de la velocidad están relacionadas con los cambios en las condiciones externas. En otros casos se observan deslizamientos llamados catastróficos por alcanzar grandes velocidades en algunos casos después de una etapa de movimiento lento. Simples leyes de resistencia no permiten explicar este tipo de comportamientos. En este artículo se analizan tres casos reales de deslizamientos activos lentos tomados de la bibliografía. En primer lugar, se pone de manifiesto que una simple ley de resistencia tipo Mohr-Coulomb predice velocidades mucho mayores que las registradas. A continuación, se muestra cómo la consideración del efecto positivo de la velocidad de deformación en la resistencia friccional permite reproducir satisfactoriamente la evolución del movimiento observado en los tres casos reales analizados mediante un modelo sencillo unidimensional.
En la segunda parte de este artículo, se analiza la evolución de los deslizamientos de una fase de reptación a una fase acelerada en la que, aparte de los efectos de la velocidad, se incluye la interacción térmica debido a la disipación del trabajo friccional en forma de calor en las bandas de corte. Un análisis de sensibilidad para el caso de deslizamientos planos muestra como en función del efecto de la velocidad sobre la resistencia y la disipación de los excesos de presión inducidos por el propio movimiento, se distingue entre deslizamientos potencialmente seguros o catastróficos. Dado un deslizamiento, para valores relativamente altos del efecto del efecto de la velocidad y del coeficiente de disipación, el deslizamiento se mantiene a velocidad lenta sin que se prevea su aceleración durante un periodo de tiempo en el cual el desplazamiento acumulado se mantiene dentro de un rango de valores razonables.Postprint (published version
Effect of 15 BMI-Associated polymorphisms, reported for europeans, across ethnicities and degrees of amerindian ancestry in mexican children
In Mexico, the genetic mechanisms underlying childhood obesity are poorly known. We evaluated the effect of loci, known to be associated with childhood body mass index (BMI) in Europeans, in Mexican children from different ethnic groups. We performed linear and logistic analyses of BMI and obesity, respectively, in Mestizos and Amerindians (Seris, Yaquis and Nahuatl speakers) from Northern (n = 369) and Central Mexico (n = 8545). We used linear models to understand the effect of degree of Amerindian ancestry (AMA) and genetic risk score (GRS) on BMI z-score. Northern Mexican Mestizos showed the highest overweight-obesity prevalence (47.4%), followed by Seri (36.2%) and Central Mexican (31.5%) children. Eleven loci (SEC16B/rs543874, OLFM4/rs12429545/rs9568856, FTO/rs9939609, MC4R/rs6567160, GNPDA2/rs13130484, FAIM2/rs7132908, FAM120AOS/rs944990, LMX1B/rs3829849, ADAM23/rs13387838, HOXB5/rs9299) were associated with BMI and seven (SEC16B/rs543874, OLFM4/rs12429545/rs9568856, FTO/rs9939609, MC4R/rs6567160, GNPDA2 rs13130484, LMX1B/rs3829849) were associated with obesity in Central Mexican children. One SNP was associated with obesity in Northern Mexicans and Yaquis (SEC16B/rs543874). We found higher BMI z-score at higher GRS (β = 0.11, p = 0.2 × 10−16) and at lower AMA (β = −0.05, p = 6.8 × 10−7). The GRS interacts with AMA to increase BMI (β = 0.03, p = 6.08 × 10−3). High genetic BMI susceptibility increase the risk of higher BMI, including in Amerindian children
Forgotten giants: Robust climate signal in pollarded trees
Producción CientíficaTree ring records are among the most valuable resources to create high-resolution climate reconstructions. Most climate reconstructions are based on old trees growing in inaccessible mountainous areas with low human activity. Therefore, reconstruction of climate conditions in lowlands is usually based on data from distant mountains. Albeit old trees can be common in humanized areas, they are not used for climate reconstructions. Pollarding was a common traditional management in Europe that enabled trees to maintain great vitality for periods exceeding the longevity of unmanaged trees. We evaluate the potential of pollarded deciduous oaks to record past climate signal. We sampled four pollarded woodlands in Central Spain under continental Mediterranean climate. We hypothesized that pollarded trees have a strong response to water availability during current period without pollarding management, but also in the period under traditional management if pruning was asynchronous among trees. Moreover, we hypothesized that if climate is a regional driver of oak secondary growth, chronologies from different woodlands will be correlated. Pollard oaks age exceeded 500 years with a strong response to Standardized Precipitation-Evapotranspiration Index (SPEI) from 9 to 11 months. Climate signal was exceptionally high in three of the sites (r2 = 0.443–0.655) during low management period (1962–2022). The largest fraction of this climate signal (≈70 %) could be retrieved during the traditional management period (1902–1961) in the three sites where pollarding was asynchronous. Chronologies were significantly correlated since the 19th century for all the studied period, highlighting a shared climate forcing. We identified critical points to optimize pollard tree sampling schema. Our results show the enormous potential of pollarded woodlands to reconstruct hydroclimate conditions in the Mediterranean with a fine spatial grain. Studying pollarded trees is an urgent task, since the temporal window to retrieve the valuable information in pollarded trees is closing as these giants collapse and their wood rots.Junta de Castilla y León-Consejería de Educación [IR2020-1-UVA08; VA171P20]EU LIFE Soria Forest Adapt [LIFE19 CCA/ES/001181]Ministerio de Ciencia e Innovación - AEI (IJC2019-040571-I)Ministerio de Ciencia e Innovación - AEI (PRE2018-084106
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