Search results for "ESOL"

Potential combined effects of maternal smoking and coffee intake on foetal death within the Danish National Birth Cohort

2018

Background: Several studies have linked coffee intake and smoking to foetal death, but a possible interaction between both exposures remains unknown.Methods: We studied, within the Danish National Birth Cohort, the potential interaction between smoking and coffee drinking while pregnant on the risk of foetal (early and late) death. The study included 90 086 pregnant women, with information about their smoking habit and coffee intake in early pregnancy, and several potential confounding factors. Interaction was studied by calculating both the hazard ratio (HR) in Cox's regression (linear and smoothed restricted cubic spline) and the interaction contrast ratio (ICR).Results: Women who neither…

Extraordinary Performance of Carbon‐Coated Anatase TiO 2 as Sodium‐Ion Anode

2015

The synthesis of in situ polymer‐functionalized anatase TiO2 particles using an anchoring block copolymer with hydroxamate as coordinating species is reported, which yields nanoparticles (≈11 nm) in multigram scale. Thermal annealing converts the polymer brushes into a uniform and homogeneous carbon coating as proven by high resolution transmission electron microscopy and Raman spectroscopy. The strong impact of particle size as well as carbon coating on the electrochemical performance of anatase TiO2 is demonstrated. Downsizing the particles leads to higher reversible uptake/release of sodium cations per formula unit TiO2 (e.g., 0.72 eq. Na+ (11 nm) vs only 0.56 eq. Na+ (40 nm)) while the …

La resolución de problemas en los libros de texto de matemáticas de Educación Primaria: del informe Cockcroft a la actualidad

2021

Actualmente se cumplen 35 años de la publicación del libro 'Las matemáticas sí cuentan', más conocido por su subtítulo El informe Cockroft. En el presente artículo se sintetizan las principales ideas vertidas en este informe sobre la importancia de la resolución de problemas y su tratamiento por parte de los libros de texto. En un segundo momento, se revisan las críticas que este material hegemónico ha recibido por parte de diferentes expertos, desde el momento de la publicación de este informe en la década de los años ochenta hasta la actualidad. Finalmente, se proponen algunas alternativas para el cambio. Thirty-five years have now passed after the publication of the book "Mathematics cou…

Elementos de resolución de problemas en primeras edades escolares con Bee-bot

2018

En este trabajo se presenta un estudio exploratorio sobre elementos de resolución de problemas puestos en juego por estudiantes de primeras edades escolares mientras resuelven tareas con el robot programable Bee-bot. En dichos problemas, los estudiantes deben secuenciar las instrucciones necesarias para que el robot recorra un camino desde un punto inicial a otro final. Se pretende observar y caracterizar actuaciones de tres parejas de estudiantes con el fin de determinar recursos heurísticos y procesos de gestión desarrollados durante la resolución de los problemas. Al ser un estudio exploratorio, se han seleccionado dos parejas de estudiantes del último curso de infantil y una pareja del …

Self-regulated learning, self-efficacy beliefs and performance during the late childhood

2010

This article analyzes relations between self-regulated learning, self-efficacy beliefs, and performance in tasks of solving arithmetic problems. The research includes 268 six-year-old students enrolled in the first year of primary school in Spain. The results from binary logistic regression models indicate that self-regulated learning and its interaction with self-efficacy beliefs predict performance. Finally, the cluster analysis shows four profiles of students: i) positive adjusted; ii) negative unadjusted I; iii) negative unadjusted II y; iv) negative adjusted.. Este artículo analiza relaciones entre el aprendizaje autorregulado, las creencias de autoeficacia y el desempeño en tareas de …

Human dignity in the learning environment : testing a sociological paradigm for a diversity-positive milieu with school starters

2004

Landowner preferences and conservation prioritization : response to Nielsen et al

2017

In-gas laser ionization and spectroscopy of actinium isotopes near the N=126 closed shell

2017

The in-gas laser ionization and spectroscopy (IGLIS) techniquewas applied on the $^{212–215}$Ac isotopes, produced at the Leuven Isotope Separator On-Line (LISOL) facility by using the in-gas-cell and the in-gas-jet methods. The first application under on-line conditions of the in-gas-jet laser spectroscopy method showed a superior performance in terms of selectivity, spectral resolution, and efficiency in comparison with the in-gas-cell method. Following the analysis of both experiments, the magnetic-dipole moments for the $^{212–215}$Ac isotopes, electric-quadrupole moments and nuclear spins for the $^{214,215}$Ac isotopes are presented and discussed. A good agreement is obtained with lar…

Characterization of Supersonic Gas Jets for High-Resolution Laser Ionization Spectroscopy of Heavy Elements

2018

© 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. The method of laser spectroscopy in supersonic gas jets was proposed for high-resolution and high-efficiency in-gas laser ionization and spectroscopy studies of short-lived nuclei. The flow properties of such supersonic gas jets have been characterized under off-line conditions. Planar laser-induced fluorescence spectroscopy of s…

Characterization of a CZT focal plane small prototype for hard X-ray telescope

2005

The promise of good energy and spatial resolution coupled with high efficiency and room temperature operation has fuelled a large international effort to develop cadmium zinc telluride (CZT) for hard X-ray applications. We are involved on the development of a hard X-ray telescope based on multilayer optics and focal plane detector operative in the 10-80 keV energy range. This telescope requires a high efficiency focal plane providing both fine spatial resolution and spectroscopy with a compact and robust design. This paper reports preliminary results on the characterization both in spectroscopic and spatial response of two small pixellated CZT detectors (10times10times1 mm3 and 10times10tim…