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Limited to no literature exists on the association among sleep quality, obesity and depression in pediatric populations. This study aims to explore this association by examining the sleep quality of children and adolescents before and after a twelve-week comprehensive multidisciplinary pediatric obesity program.
Archival data from the pediatric obesity program included 71 children ages 6-17 (M=10.24, SD=2.74 ) who had been assessed pre and post intervention using the Children's Depression Inventory (CDI), a Sleep Questionnaire, and physician derived Body Mass Index (BMI). On all measures, higher scores indicate presence of symptoms of depression, sleep difficulties, or obesity.
High scores on the CDI proved to predict poor sleep quality both at intake and exit. Hierarchical regression exhibited change in BMI from intake to exit and predicted sleep quality. As BMI decreased from intake to exit, sleep quality increased.
The current study suggests that sleep quality is influenced by the level of depression in children and adolescents both at pre and post intervention measures. Both depression and BMI influenced sleep quality. When the effect of BMI was accounted for, depression significantly predicted sleep quality. The more depressed children/adolescents reported to be, the lower their quality of sleep. Thus, this study suggests the importance of sleep and depression in the treatment of pediatric obesity. This research supports the importance of a multidisciplinary approach to addressing pediatric obesity.
We present results from deep Chandra X-ray observations of the galaxy group NGC 5813. This system shows three pairs of collinear cavities, with each pair associated with an elliptical AGN outburst shock. Due to the relatively regular morphology of this system, and the unique unambiguous detection of three distinct AGN outburst shocks, it is particularly well-suited for the study of AGN feedback and the AGN outburst history. We find that the mean kinetic power is roughly the same for each outburst, and that the total energy associated with the youngest outburst is significantly lower than that of the previous outbursts. This implies that the mean AGN jet power has remained stable for at least 50 Myr, and that the youngest outburst is ongoing. We find that the mean shock heating rate balances the local radiative cooling rate at each shock front, suggesting that AGN outburst shock heating alone is sufficient to offset cooling and establish AGN/ICM feedback within at least the central 30 kpc. Finally, we find non-zero shock front widths that are too large to be explained by particle diffusion, but are instead consistent with arising from broadening of the shock fronts due to propagation through a turbulent ICM with a mean turbulent speed of ~ 70 km s−1.
We review the performance of the PollyVote, which combined forecasts from polls, prediction markets, experts’ judgment, political economy models, and index models to predict the two-party popular vote in the 2012 US presidential election. Throughout the election year the PollyVote provided highly accurate forecasts, outperforming each of its component methods, as well as the forecasts from FiveThirtyEight.com. Gains in accuracy were particularly large early in the campaign, when uncertainty about the election outcome is typically high. The results confirm prior research showing that combining is one of the most effective approaches to generating accurate forecasts.
Ferroelectric thin films typically differ from bulk ceramics in terms of both the average grain size and the degree of stress imposed on the film by the substrate. Studies on bulk ceramics have demonstrated that the number of domain variants within grains depends on the grain size for sizes <˜lμm. This can diminish the poling efficiency of the material. Since most thin films show primary grain sizes well below a micron, similar effects should be observed in films. In addition, since the perovskite ferroelectrics contain ferroelastic as well as ferroelectric domains, it seems clear that stress in thin films may markedly alter the degree to which domain walls contribute to the observed properties. In this paper, the relative importance of these factors are discussed for several types of ferroelectric thin films. Films have been prepared by pulsed laser deposition, magnetron sputtering, and by sol-gel processing. It has been found that epitaxial BaTiO3 films are ferroelectric at 77K down to thicknesses as low as ˜ 60nm. Data on the low and high field electrical properties are reported as a function of temperature, the film crystallinity, and film thickness for representative perovskite films.
Results of a study of the luminescence of rare earth ions in crystalline thin films grown on reflective substrates will be presented. As an example, the luminescence of Sm2+:CaF2 films has been calculated as a function of the separation between the active layer and a silicon substrate. These calculations involve coupling the narrow resonance of the rare earth ions to the electromagnetic modes of the film. Results including the optimum thickness for enhanced luminescence will be presented. Experimental work on Sm2+:CaF2 films grown on Si by molecular beam epitaxy will also be discussed.
Two unusual cavities at a Northumberland colliery are described. Although apparently of tectonic origin they do not seem to be related to any major fault. Sideronatrite, not previously recorded in this country, is thought to result from the alteration of the marcasite and pyrite lining the cavities by underground saline waters. These waters are the source of the baryte and gypsum that are also found in the cavities and of the salt stalactites in the disused roadways of the colliery.
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