3,318 research outputs found

    Schoolyard Improvements and Standardized Test Scores: An Ecological Analysis

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    Boston MA’s schoolyards had seriously deteriorated since the middle of the 20th century resulting in dangerous and unusable outdoor spaces. Beginning in the mid 1990s, a program to renovate these schoolyards has resulted in approximately half of the schools now having outdoor recreational, learning and garden spaces. This study compared the 4th grade test score results in renovated vs. unrenovated schools. Controlling for school demographics, schools that had a renovated schoolyard had more of their students passed the state mandated math test (1.06, 95% confidence interval = .00012, .12). Effects on the state mandated English language arts test were not as great. While this is an ecologic analysis and there may be other factors that influenced the better performance on the math test, this study suggests that improvements to the physical environment of schools and/or better access to physical activity may result in better school performance

    Assessment of Buffet Forcing Function Development Process Using Unsteady Pressure Sensitive Paint

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    A wind tunnel test was conducted at the Ames Unitary Plan Wind Tunnel to characterize the transonic buffet environment of a generic launch vehicle forebody. The test examined a highly instrumented version of the Coe and Nute Model 11 test article first tested in the 1960s. One of the measurement techniques used during this test was unsteady pressure sensitive paint (uPSP) developed at the Arnold Engineering Development Complex. This optical measurement technique measured fluctuating pressures at over 300,000 locations on the surface of the model. The high spatial density of these measurements provided an opportunity to examine in depth the assumptions underpinning the development of buffet forcing functions (BFFs) used in the development of the Space Launch System vehicle. The comparison of discrete-measurement-based BFFs to BFFs developed by continuous surface pressure integration indicates that the current BFF development approach under predicts low frequency content of the BFFs while over predicting high frequency content. Coherence-based adjustments employed to reduce over prediction in the surface integration of discrete pressure measurements contribute to the inaccuracy of the BFFs and their implementation should be reevaluated

    Globalization, Urban Competitiveness, and Human Capital: Davidson County, Tennessee\u27s Place in the Equation

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    Profound changes in the structure of the global economy since the end of World War II have drastically affected the way governments, businesses, and individuals interact with one another. The development of regional trading alliances (European Union, NAFTA, APEC), the end of the Cold War, and the rapid development of information technologies have contributed to new global economic theories that are being adopted by places large and small. Simply put, economic paradigms have changed. Local concerns have become more prevalent in the public debate over economic, political, and societal changes as a whole. The goal of my research is to determine the most relevant factors in attracting human capital and to examine the effectiveness of public policy decisions aimed at attracting and retaining quality human capital. Since the types of data needed to analyze trends within cities themselves are not readily available for analysis, this work was conducted at the county level. In this study, I argue that analyses of specific demographic variables using descriptive statistics and cluster analyses should indicate that Nashville-Davidson County has a distinct advantage in stocks of human capital over other similarly sized counties, and that this advantage in quality human capital can be linked to job growth in the hightechnology sector. This study\u27s results indicate that Davidson County, Tennessee, has an advantage over other similarly sized counties in the amount and quality of its human capital. This advantage in human capital and the balance of Davidson County\u27s high-tech economic sector (for the variables studied) suggests that Nashville is poised to make great strides economically in the global high-tech economy

    Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Analysis of Lower Pecos Rock Paints and Possible Pigment Sources

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    Chemical analyses of prehistoric rock paints from the Lower Pecos Region of southwestern Texas were undertaken using laser ablation-inductively coupled plasma-mass spectrometry. This technique allowed us to measure the chemical composition of the paint pigments with minimal interference from a natural rock coating that completely covers the ancient paints. We also analyzed samples representing potential sources of paint pigments, including iron-rich sandstones and quartzite from the study area and ten ochre samples from Arizona. Cluster analysis, principle component analysis and bivariate plots were used to compare the chemical compositions of the paint and pigment sources. The results indicate that limonite extracted from the sandstone was the most likely source for some of the pigments, while ochre was probably used as well

    Program Manager Competencies (Chapter 11 of Program Management for Improved Business Results)

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    The successful program manager is constantly seeking to learn and broaden his or her knowledge and experience in order to take on more complex and critical programs. The program management competency model was developed in order to address the breadth, depth, and complexity of the program management role. This chapter uses the program management competency model to detail the knowledge, skills, and abilities needed for program managers to continually grow as professionals and consistently succeed in their role. The various types of competencies that are discussed in the chapter are: customer and market competencies, business and financial competencies, process and project management competencies, and leadership competencies. Additionally, the chapter discusses the key organizational enablers needed to make the competency model fully effective and to adequately support the program management discipline within an organization
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