Can education policy make children happier? A comparative study in 33 countries

There is an increasing academic and policy interest in subjective well-being (SWB). However, the questions of whether and how public policy can promote children’s SWB remain understudied. This thesis aims to reduce this gap by studying the association between education policy and students’ SWB, with a focus on life satisfaction (LS). To quantitatively study this question, this thesis analyses data on 15-year-old students in 33 countries that participated in the 2015 Programme for International Student Assessment (PISA) study. The analysis draws on Bronfenbrenner’s ecological model of child development and it is conducted by using a range of advanced quantitative methods, mainly multilevel regression. This thesis presents analysis demonstrating an association between several education policy-relevant factors and students´ LS, which is particularly prominent –and observed in almost all countries- for schoolwork-related anxiety, bullying and parents’ emotional support in relation to school. Results also indicate that schools may play an important role in shaping students’ LS. This is supported by evidence that these associations tend to vary by school, by evidence on the existence of school effects in almost all countries, and by the finding that a proportion - substantial in some countries- of the variation in students’ LS is explained by differences between schools. Moreover, findings suggest that school type and school peers’ characteristics can be important to students’ LS too. In addition, in many countries, the links between schools and education policy and students’ LS differ for girls and boys and for students of different socio-economic status. Finally, in all the analyses described above, there are significant differences across countries. Overall, this thesis makes key contributions to our understanding of whether and how children´s SWB can be influenced by schools and education policy, supporting calls that education policy should also be assessed in terms of its impact in children´s SWB

Already gone

Already Gone is a project that explores the relationship of the photographic medium to the concepts of time and history, and the several temporal and historical layers contained within any photographic image. It is heavily influenced by photo-conceptualist practices that were introduced in the 1960s that often employed a de-skilled aesthetic, and questioned photography\u27s intrinsic characteristics, possibilities, and limitations. Already Gone is inspired by the ideas of artistic agency in a time where the end of history and the beginning of post-history is proposed, and in the effects the demise of analog photography might have in the indexical nature of the medium. This project is the culmination of ideas about my uneasiness regarding the prevailing uncertainty in contemporary photographic and artistic practice, and my adherence to an approach to art-making based on the everyday as source of inspiration for the creation of work, where awareness is exercised with the ulterior motivation of acquiring consciousness through an artistic process

Supramolecular Chemistry Approach To The Design Of A High-resolution Sensor Array For Multianion Detection In Water

Reliable sensing of structurally similar anions in water is a difficult problem, and analytical tests and sensor devices for reliable sensing of multiple anions are very rare. This study describes a method for fabrication of simple colorimetric array-based assays for aqueous anion solutions, including complex analytes encountered in real-life applications. On the fundamental level, this method shows how the discriminatory capacity of sensor arrays utilizing pattern recognition operating in multianalyte environments may be dramatically improved by employing two key features. The synergy between the sensor and hydrogel host resembles the cooperative effects of an apoenzyme and cofactor: the host hydrogel helps extract the target anions from the bulk analyte while stripping the solvate molecules off the anions. In addition, the supramolecular studies of the affinity and selectivity of the potential sensors for target analytes allow for constructing an array predesigned for a particular analyte. To illustrate both aspects, an eight-sensor array utilizing colorimetric sensor materials showing selectivity for fluoride and pyrophosphate while displaying significant cross-reactivity for other anions such as carboxylates, phosphate, or chloride was used to differentiate between 10 anions. The quantitative analyses were also performed to show that the eight-sensor array was found to operate across 4 orders of magnitude concentrations (0.20-360 ppm; 10 mu M to 20 mM). The applicability of this approach was demonstrated by analyzing several toothpaste brands. The toothpastes are complex analytes comprising both known and unknown anions in various concentrations. The fluoride-selective yet cross-reactive array is shown to utilize the fluoride content as the main differentiating factor while using the remaining anionic components for further differentiation between toothpaste brands

Simple Electrooptical Sensors For Inorganic Anions

Electrooptical sensors consisting of a conjugated chromophore undergoing a change in color and a redox-active moiety such as quinone fused to the chromophore were synthesized. Strong changes in colorimetric and electrochemical properties were observed in the presence of inorganic anions. A unique anion-specific response was observed for fluoride, pyrophosphate, and acetate. DFT (B3LYP/6-31G*) calculations performed for both on/off states of a sensor-fluoride model are in good agreement with the observed electrochemical and spectroscopic data

Facile sol-gel synthesis of porous silicas using poly(propylene)imine dendrimers as templates

Commercially available poly(propylene)imine (DAB-Am-32 and DAB-Am-64) dendrimers were used as single-molecule templates to tailor the porosity of silicas via a nonacidic sol-gel method. X-ray diffraction on both the as-prepared (oven-dried at 373 K) and the calcined (833 K) materials revealed that modest contraction took place on template removal and that the cavities created did not achieve three-dimensional ordering under the current synthesis conditions. Transmission electron microscopy of “Pt-stained” samples supported this picture. A modified Horvath–Kawazoe analysis of the argon adsorption isotherms indicated that DAB-Am-64 is a much more effective template than DAB-Am-32. Pyrolysis and oxidation protocols for template removal are also presented

Contribución al estudio de la acción nociva de la luz con motivo de dos casos de disminución de la agudeza visual a consecuencia de la observación del ultimo eclipse de sol

Copia digital. España : Ministerio de Cultura. Subdirección General de Coordinación Bibliotecaria, 202

Facile sol-gel synthesis of porous silicas using poly(propylene)imine dendrimers as templates

Commercially available poly(propylene)imine (DAB-Am-32 and DAB-Am-64) dendrimers were used as single-molecule templates to tailor the porosity of silicas via a nonacidic sol-gel method. X-ray diffraction on both the as-prepared (oven-dried at 373 K) and the calcined (833 K) materials revealed that modest contraction took place on template removal and that the cavities created did not achieve three-dimensional ordering under the current synthesis conditions. Transmission electron microscopy of “Pt-stained” samples supported this picture. A modified Horvath–Kawazoe analysis of the argon adsorption isotherms indicated that DAB-Am-64 is a much more effective template than DAB-Am-32. Pyrolysis and oxidation protocols for template removal are also presented

Forecasting Air Quality Data with the Gamma Classifier

Non

Fundamentos filosóficos y técnicas metodológicas en el aprendizaje heutagógico, EsSalud, Lima 2017

El propósito de la investigación fue fortalecer el corpus teórico limitado del aprendizaje autodeterminado, y proponer el desarrollo de técnicas metodológicas específicas, con el objetivo de establecer que fundamentos filosóficos y técnicas metodológicas influyen en el aprendizaje heutagógico aplicado por los instructores de la Escuela de Emergencia de EsSalud. Estudio descriptivo correlacional transversal, con una población de 17 instructores que dictaron cursos de los módulos básicos, avanzados, especializados, integrales, gestión y de desastres; el tipo de muestreo fue no probabilístico intencionado, para la recolección de datos, la técnica de estudio propuesta fue una encuesta, y el instrumento una lista de chequeo estructurado de acuerdo a los objetivos de la investigación, validado por juicio de expertos. El procesamiento de los resultados y análisis de la investigación fueron con aplicación del paquete estadístico SPSS - Statistical Package for Social Sciencies. La contrastación de la hipótesis general fue mediante el coeficiente de Correlación Parcial de Rango de Kendall, y las hipótesis específicas, se usó el coeficiente de correlación de rango de Spearman que sigue una distribución t con un nivel de significancia 0.05 y n-2 grados de libertad. Resultado, los fundamentos filosóficos se relacionan directamente con el aprendizaje heutagógico; las técnicas metodológicas y tipos de técnicas metodológicas se relacionan moderadamente y positivamente con el aprendizaje heutagógico. Se concluye establecido mediante el Coeficiente de Correlación Parcial de Rango de Kendall (p= 0,039Tesi