Three Dimensional Inverse Synthetic Aperture Radar Imaging

This research investigates the generation, display, and interpretation of three-dimensional (3-D) Synthetic Aperture Radar images. Three-dimensional assumes that the data collected consists of one temporal dimension and two orthogonal angular dimensions. From this data, a three dimensional reflectivity map, or 3-D image, of a target can be constructed. This thesis effort develops and applies a three-dimensional imaging algorithm on actual radar data measured on a one-third scale model of a C-29 aircraft. Two-dimensional slices of the three-dimensional image as well as three-dimensional isosurfaces are compared to the physical properties of the target. The results demonstrate the ability to produce three-dimensional images given three-dimensional radar data

The Relationship between Competency in Shorthand Accuracy and Achivement in Shorthand Dictation

This problem was a study of the relationship between (a) competency in shorthand accuracy and achievement in shorthand dictation and (b) competency in shorthand accuracy and measured intelligence

Corn Response to Competition: Growth Alteration vs. Yield Limiting Factors

Competition mechanisms among adjacent plants are not well understood. This study compared corn growth and yield responses to water, N, and shade at 74,500 plants ha−1 (1×) with responses to water and N when planted at 149,000 plant ha−1 Plant biomass, leaf area, chlorophyll content, reflectance, and enzyme expression (transcriptome analysis) were measured at V-12. Grain and stover yields were measured with grain analyzed for 13C isotopic discrimination (Δ) and N concentration. At V-12, 60% shade plants had increased chlorophyll and reduced leaf area and height compared to full sun plants. In the 2× treatment, plants had 11% less chlorophyll than 1× plants with leaf area and height similar to 60% shade plants. At harvest, plants in the 2× treatment were smaller, had increased water and N use efficiency, and an 11% per hectare yield increase compared with the 1× unstressed treatment. Per-plant yields from 60% shade and 2× treatments were 50% less than 1× unstressed treatment. Yield reduction in shaded plants was attributed to light stress. Lower yield in the 2× treatment was attributed to a population-density induced 20% decrease in the red/near-infrared (NIR) ratio, which resulted in downregulation of C4 carbon metabolism enzymes (phosphoenolpyruvate carboxykinase, phosphoenolpyruvate carboxylase, and pyruvate orthophosphate dikinase). Although the net impact of high plant density and shade stress on per-plant yield were similar, the stress compensation mechanisms differed

Neurocognitive and temperamental systems of self-regulation and early adolescents’ social and academic outcomes

The aim of the current study was to examine the role of individual differences in neurocognitive and temperamental systems of self-regulation in early adolescents ’ social and academic competence. Measures used in the study included the Attention Network Test, the Early Adolescence Temperament Questionnaire, a peer-reported Social Status Questionnaire, a self-reported measure of Schooling Skills, and information on grades obtained by the students in a variety of school subjects ( n = 69 12-year olds). Results showed that effi ciency of the neurocognitive network of executive attention is related to academic outcomes, particularly in mathematics, as well as to aspects of social adjustment. Temperamental effortful control appears to be a signifi cant predictor of all dimensions of school competence assessed in this study and mediates the relationship between social adjustment and poor schooling outcomes. These data suggest that individual differences in systems of self-regulation are central to understanding processes of learning and social adjustment in the school

Stress ocupacional no ensino : um estudo com professores dos 3º ciclo e ensino secundário

Este trabalho foi realizado com 689 professores portugueses, a leccionarem nos terceiro ciclo e ensino secundário. Foram avaliados indicadores de stress, “burnout”, saúde física e satisfação profissional. Observaram-se valores significativos de stress ocupacional (perto de 40%), e de “burnout” (10% na exaustão emocional, 3% na baixa realização pessoal e 1% na despersonalização), vários problemas de saúde física e valores de insatisfação profissional perto dos 20%. As análises de regressão múltipla apontaram diferentes variáveis preditoras para as três dimensões do “burnout” (62% de variância explicada na exaustão emocional, 16% na realização pessoal e 13% na despersonalização). As análises discriminantes e “t-test” para amostras independentes demonstraram maior stress ocupacional nas mulheres, nos professores mais velhos, nos profissionais com vínculos profissionais mais precários, nos professores com mais horas de trabalho e com mais alunos em sala de aula. No final, apresentam-se as limitações do estudo e as implicações para a investigação futura.(undefined

Community-based nursing: An introduction

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Does On-site Experience Affect Responses to Stated Preference Questions?

An important issue in the design of stated-preference surveys is in the hypothetical setting whether providing information to the respondents can elicit valid value estimates. On-site experience with a resource is one way to provide respondents with first-hand information about the valuation object. In the research here we construct a treatment by providing the survey respondents an opportunity to have a walk through the forest. We compare the preference parameter estimates for on-site treatment with those for a mail survey in the context of a choice study of forest management practices. As both the sample/frame/mode and the information provided have been changed, we conduct both the on-site, pretest and on-site, posttest survey to differentiate the information effect. The results show that the stated preference is procedure invariant. The mail survey respondents are remarkably similar with both the on-site, pretest survey and the on-site, posttest survey. It indicates a mail scenario can provide sufficient information through appropriate description, and an on-site experience is not always necessary for respondents to estimate policy relevant values