Irradiation effects studies of NERVA materials

Several materials used in the NERVA project were irradiated at cryogenic temperatures to neutron fluences between 10 to the 17th and 10 to the 19th power newtons per square centimeter. Tensile properties were determined over a temperature range to evaluate the effects of irradiation on the material properties. The expected radiation damage typical of other materials was observed. A general increase in strength and decrease in ductility occurred. The effects at liquid nitrogen temperatures are more pronounced since radiation induced defects are not annealed out

An examination of the contribution and function of the music workshop in the in-service education of the classroom teacher

Thesis (M.M.)--Boston Universit

H. A. Merrick to Governor Langer, 1933

In this letter dated December 4, 1933, H. A. Merrick praises Governor William Langer for his progressive leadership, particularly for his proclamation against foreclosures. H.A. Merrick was the President of Superior Service Laundries in Seattle.https://commons.und.edu/langer-papers/1009/thumbnail.jp

Large antenna apertures and arrays for deep space communications

Effect of frequency on communications capability, single antennas and arrays, and economic balance between ground station and spacecraft developmen

Application of A Distributed Nucleus Approximation In Grid Based Minimization of the Kohn-Sham Energy Functional

In the distributed nucleus approximation we represent the singular nucleus as smeared over a smallportion of a Cartesian grid. Delocalizing the nucleus allows us to solve the Poisson equation for theoverall electrostatic potential using a linear scaling multigrid algorithm.This work is done in the context of minimizing the Kohn-Sham energy functionaldirectly in real space with a multiscale approach. The efficacy of the approximation is illustrated bylocating the ground state density of simple one electron atoms and moleculesand more complicated multiorbital systems.Comment: Submitted to JCP (July 1, 1995 Issue), latex, 27pages, 2figure

Do Not Play With Fire

Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light and various reaction products. Fire is intriguing and therefore something that will attract a curious child from an early age. In 2010, the United States fire department responded to 44,900 fires started by someone, usually a child, playing with fire. These fires caused 90 civilian deaths, 890 civilian injuries and $210 million in direct property damage. Preschoolers and kindergartners are most likely to start these fires, while playing with matches or lighters and most likely to die in these fires. Most fire-play fires (77%) started outside, but most associated deaths (97%) were in home structure fires. Almost half (46%) of people who start reported home fires by playing were five years old or younger. Two out of five (40%) child-playing home structure fires began in the bedroom. Mattresses and bedding were the items first ignited in 24% of child-playing home structure fires and 29% of associated civilian fire deaths

Intellectual and Developmental Disability: Healthcare Financing

The World Health Organization (WHO) estimates global spending on healthcare at $6.5 trillion, approximately 10.5$2.6 trillion, essentially quadrupling since 1980. The 2010 United States Patient Protection and Affordable Care Act (PPACA), also known as Obamacare, has stimulated extensive debate over the way in which healthcare is financed, and whether or not the costs of healthcare are sustainable. Among publicly funded healthcare in the US, Medicaid and Medicare are primary sources of funding. In federal fiscal year 2012, Medicaid spending on acute health exceeded $275.4 billion, while a further$122.7 billion expended in Medicaid long term services and supports. The impact of an aging population worldwide (the so-called “wave of wisdom”), as the Baby Boomer generation reaches senior status, and attendant increases in chronic conditions, will be a substantial driver of healthcare costs in the future. Among people with intellectual and developmental disabilities (IDD), cost estimates vary depending on a range of factors. Some children with IDD, for example, are covered for at least some healthcare needs by private insurance policies held by their parents, while other children and most adults with IDD rely heavily on Medicaid and, to a lesser extent, Medicare and other publicly financed healthcare options. In many US states, certain nursing and home health services are presumed to be part of funding of home and community-based service (HCBS) medicaid waiver services (typically considered part of residential service reimbursements under these waivers), and rely on medicaid state plans for other acute health services. There are also wide ranges of estimates of uncompensated care that, when combined with other variables that are difficult to control, make accurate aggregate cost estimates difficult. Birenbaum and Cohen offer a review of healthcare utilization and costs in general for people with IDD