1,015 research outputs found
Evidencia de elementos asociados al pensamiento funcional en currÃculo chileno de educación básica
En este estudio abordamos el análisis de elementos asociados al pensamiento funcional en el currÃculo chileno. Realizamos un análisis de contenido de las directrices relativas al álgebra escolar para las edades 6-13 años. Analizamos cada uno de los programas de estudio de matemáticas para cada uno de los ocho años mencionados. Mostramos un resumen de los elementos asociados al pensamiento funcional presente en cada programa de estudio, organizado por curso. Además, presentamos ejemplos que evidencian elementos de este tipo de pensamiento. Los resultados muestran que en todos los cursos de educación básica chilena hay presencia de elementos relacionados con el pensamiento funcional
Generación y continuación de patrones por dos alumnas de 6-7 años en tareas de seriaciones
Presentamos un estudio de casos a través de entrevistas semiestructuradas para describir la generación de patrones y la continuación de seriaciones cualitativas que realizan dos alumnas de 6-7 años. Describimos el trabajo realizado por las alumnas en diez tareas de patrones lógicos construidas de acuerdo a tres criterios: (a) atributos, (b) número de elementos en el núcleo y (c) variación de atributos entre elementos. Los resultados evidencian que las alumnas generan diferentes tipos de patrones y continúan diferentes tipos de seriaciones (reiterativas y no reiterativas), con distinto número de elementos en el núcleo
Construcción de seriaciones en educación primaria: un estudio de caso
Presentamos un estudio de caso cuyo objetivo es describir las seriaciones que construye una alumna de 7 años. Pedimos a la alumna que continuara 14 seriaciones diferentes, conociendo dos elementos inÃciales dados. La recogida de datos se llevó a cabo a través de una entrevista semiestructurada. En este trabajo describimos el tipo de seriaciones que la alumna construyó atendiendo a las variables de tarea consideradas en esta investigación para el diseño de las seriaciones. Mostramos algunos ejemplos de las producciones de la alumna. Entre los resultados, destacamos que la alumna construyó seriaciones reiterativas y no reiterativas, atendiendo a diferentes patrones y distinto número de elementos en el núcleo
Shock Transmission and Coupling with External Stock Markets: Assymetric Effects and Structural Break
In this article, we analyze the effects of shock transmissions from selected advanced financial markets—Tokyo, New York, Paris and Frankfurt— to Santiago de Chile and Sao Paulo (Bovespa) as a control. This research focuses on the recent financial crises of 2007 and 2008 where the transmission flowed from the developed world towards emerging markets, such as Chile. Our analysis incorporates the transmission effects in mean, variance and covariance. For the mean equation, we implemented a non-restricted VAR model. For the variance component, we modeled a specification with asymmetric effects. The covariance and correlation effects are estimated using a conditional dynamic asymmetric model based on the dynamic conditional correlation model of Engle, testing for the possibility of long run structural breaks in correlations between financial markets. We found strong evidence of structural breaks increasing correlations during the recent financial crisis. Our results are consistent with international evidence.
Friends or just fans? Parasocial relationships in online television fiction communities
This paper explores parasocial phenomena on social media pages related to Spanish television fiction by analysing the development of parasociality through relationships established between users and characters and the characteristics of this type of online community. The sample consisted of 4,762 spontaneous comments posted on social media pages (1,598 on Facebook and 3,164 on Twitter) linked to television series. Comments published between 1 January 2018 and 31 May 2020 were compiled the day after the premiere of each fiction. Our findings confirm those of previous researchs on the similarity between parasocial relationships with fictional characters and relationships in real life. This study also substantiates that women’s comments show a greater tendency to draw associations between parasocial relationships and daily life. We also find a link between programme longevity and audience success on the one hand, and the intensity of parasocial relationships with the characters on the other. The relationships among community members reveal a degree of narcissism, prompting more self-disclosure than interaction with the rest of the users. Therefore, such relationships are closer to consociality (Kozinets, 2015) than parasociality, although significant differences concerning gender identity are also found in this context.Este artÃculo explora los fenómenos parasociales que se producen en las redes sociales dedicadas a la ficción televisiva española, con el objetivo de analizar tanto las relaciones entre los usuarios y los personajes como las caracterÃsticas de este tipo de comunidades y la evolución de ambas manifestaciones de la parasocialidad. La muestra de análisis está integrada por 4.762 comentarios espontáneos en las webs dedicadas a los programas (1.598 en Facebook y 3.164 de Twitter), publicados entre el 1 de enero de 2018 y el 31 de mayo de 2020 y recogidos al dÃa siguiente del estreno de cada ficción. El trabajo confirma los resultados de las investigaciones precedentes sobre la semejanza de las relaciones parasociales con los personajes y las relaciones reales, asà como la mayor tendencia de los comentarios femeninos a extrapolar las relaciones parasociales a su vida cotidiana. El análisis también evidencia la relación entre, por un lado, la longevidad de los programas y el éxito de audiencia y, por otro lado, la intensidad de las relaciones parasociales con los personajes. Las relaciones entre los miembros de la comunidad revelan un cierto narcisismo, que los induce más a mostrarse (self-disclosure) que a interactuar con el resto de los usuarios. Se sitúan, por consiguiente, más próximos a la consocialidad (Kozinets, 2015) que a la parasocialidad, aunque también en este punto se aprecian diferencias significativas en relación con la identidad de género
Concentración de TSH endógena : un nuevo test para el diagnóstico de hipotiroidismo canino
Desde hace varios años disponemos del test para calcular la concentración de tirotropina (TSH) endógena canina. Los estudios publicados hasta el momento coinciden en que se trata de una prueba útil para el diagnóstico del hipotiroidismo en el perro. La concentración basal de TSH canina presenta una sensibilidad moderada (70%) y una especificidad alta (90%). Aunque la interpretación conjunta de los niveles de tiroxina (T4) total y de TSH aporta una buena eficacia diagnóstica, es conveniente descartar enfermedades no tiroideas antes de realizar estas pruebas hormonales. Cuando se evalúa un perro con un cuadro clÃnico compatible de hipotiroidismo, una concentración baja de T4 Y alta de TSH confirma el diagnóstico.An assay for determination of canine thyrotropin (cTSH) has become available a few years ago. Recent studies agree that determination of cTSH is a useful test for the diagnosis of hypothyroidism in dogs. The basal eTSH concentration has a moderate sensitivity (70%) and a high specificity (90%). Although the interpretation of both thyroxine (T4) and cTSH concentrations provides a good diagnostic accuracy, is suitable to rule out non-thyroidal illnesses before performing thyroid functÃon tests. When evaluating a dog with clinical signs consistent with hypothyroidism, the finding of a low thyroxine concentration (T4) and a high eTSH concentration in a dog confirms the diagnosis
Depression, professional self-efficacy, and job performance as predictors of life satisfaction: the mediating role of work engagement in nurses
BackgroundThe life satisfaction and job performance of nursing professionals are affected by a multitude of factors, including work engagement, self-efficacy, and depression. The Job Demands-Resources (JD-R) model provides a theoretical framework to explore these relationships.ObjectiveOur study aimed to analyze the primary goal of this research, which is to examine the mediating role of work engagement in the relationship between depression, professional self-efficacy, job performance, and their impact on life satisfaction in nurses, using the JD-R theory as a guide.MethodsThis cross-sectional study involved 579 participants aged between 21 to 57 years (M = 39, SD = 9.95). Mediation analysis was used to examine the influence of depression, self-efficacy, and job performance on work engagement, and in turn, its effect on life satisfaction.ResultsFindings indicated that work engagement plays a crucial mediating role between depression, self-efficacy, job performance, and life satisfaction. Interventions to increase work engagement could assist nurses in better managing depression and improving their performance and life satisfaction.ConclusionsOur study highlights the need for workplace policies and strategies that foster work engagement and self-efficacy among nurses while effectively managing job demands to prevent depression. Moreover, these findings underscore the importance of the JD-R theory to understand and improve nurses' job satisfaction and performance, and suggest areas for future research, including exploring other potential factors and applying these findings across different contexts and cultures
Seroprevalence of canine brucellosis in the district of Los Olivos, Lima, Peru
El estudio evaluó la seroprevalencia de brucelosis canina en el distrito de Los Olivos, Lima, Perú, mediante el método diagnóstico de Inmunodifusión en Gel de Agar (IDGA). Se recolectaron 288 muestras de sangre de canes mayores de dos meses de edad. Los sueros resultantes se analizaron para la determinación de seropositividad a Brucella canis. La seroprevalencia de brucelosis canina fue de 4.9 ± 1.8% (IC 95%) y una seroprevalencia corregida de 5.3 ± 2.6% (IC 95%), sin encontrar un efecto significativo para las variables edad, sexo, condición fisiológica, hábitos de paseo e historia reproductiva.The study evaluated the seroprevalence of canine brucelosis in the district of Los Olivos, Lima, Peru by the Agar Gel Immunodifussion test (AGID). Blood samples (n=288) were collected from dogs older than 2 months of age. The sera were tested for Brucella canis. The seroprevalence of canine brucelosis was 4.9 ± 1.8% (95% CI) and the corrected seroprevalence was 5.3 ± 2.6% (95% CI), without significant association for age, sex, physical condition, indoor/outdoor habits and reproductive history
A search for pre- and proto-brown dwarfs in the dark cloud Barnard 30 with ALMA
In this work we present ALMA continuum observations at 880 m of 30
sub-mm cores previously identified with APEX/LABOCA at 870m in the Barnard
30 cloud. The main goal is to characterize the youngest and lowest mass
population in the cloud. As a result, we report the detection of five (out of
30) spatially unresolved sources with ALMA, with estimated masses between 0.9
and 67 M. From these five sources, only two show gas emission. The
analysis of multi-wavelength photometry from these two objects, namely B30-LB14
and B30-LB19, is consistent with one Class II- and one Class I low-mass stellar
object, respectively. The gas emission is consistent with a rotating disk in
the case of B30-LB14, and with an oblate rotating envelope with infall
signatures in the case of LB19. The remaining three ALMA detections do not have
infrared counterparts and can be classified as either deeply embedded objects
or as starless cores if B30 members. In the former case, two of them (LB08 and
LB31) show internal luminosity upper limits consistent with Very Low Luminosity
objects, while we do not have enough information for LB10. In the starless core
scenario, and taking into account the estimated masses from ALMA and the
APEX/LABOCA cores, we estimate final masses for the central objects in the
substellar domain, so they could be classified as pre-BD core candidates.Comment: Published in A&
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