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

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

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

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

"Factores socioeconómicos que intervienen en el desempeño académico de los ingresantes de la Facultad de Ingeniería Mecánica y de Energía de la UNAC, 2018".

La presente investigación de tipo descriptiva- cualitativa trata sobre los "Factores socioeconómicos que intervienen en el desempeño académico de los ingresantes de la facultad de ingeniería mecánica y de energía de la UNAC en el año 2018", lo hemos dividido en tres partes: la parte 1 se trata el ASPECTO SOCIOECONÓMICO, en la que consideramos temas como las personas que viven con el estudiante, cuanto dependen económicamente de sus padres, Promedio de ingreso familiar, Dinero que recibe diario para sus gastos personales, si desempeña labor remunerada, actividad en la que trabaja, tiempo que está trabajando, horas que trabaja, exigencia de sus empleadores, cómo afecta el trabajo a sus estudios, cuanto percibe mensualmente, propiedad de la vivienda donde reside, servicios con que cuenta la vivienda, artefactos con que cuenta en el hogar, movilidad de su casa a la universidad, beca de alimentos, si usa la residencia universitaria, la biblioteca Central, la biblioteca especializada FIME, tipo de colegio que ha estudiado; en la parte 11, se trata el ASPECTO FAMILIAR en la que se consideran temas como el estado civil del estudiante, si tiene hijos y pareja, cuál es su relación con las personas de su entorno, a qué dedica sus horas libres; La parte 111, trata sobre el DESEMPEÑO ACADÉMICO, donde vemos, cómo las personas de su entorno afectan en su desempeño académico, cómo se considera como alumno, asignatura que más le agrada, asignatura que más le desagrada, cursos que piensas aprobar, método de estudio, consideración sobre la implementación y mobiliario del aula, tipo de estudio para las evaluaciones, consideración hacia sus profesores, su opinión sobre la implementación del laboratorio de química, a su asistencia a clases, opción en la que ha ingresado, que tanto le agrada la carrera que sigue, lugar de nacimiento y distrito donde vive.Trabado de investigacio