The equilibrium free surface of a contained liquid under low gravity and centrifugal forces

Equilibrium free surface of contained liquid under effects of low gravity, translational and angular acceleration, and capillary force

An Examination of School Culture and English Language Learner Achievement

English Language Learners (ELLs) do not achieve sufficiently on standardized tests, as required by federal law. Fourth grade ELLs at a suburban elementary school in the Southern United States experienced similar problems in the failure rate on the state standardized test. Still, this school outperformed several of the schools in the same area of the county. In this sequential, explanatory study, teacher and administrator perceptions of school culture and its impact on the achievement of ELLs in a Southern elementary school were examined. Vygotsky\u27s cultural-historical theory provided the theoretical framework to ground this study, as culture within a school could influence student achievement. At the study site, 26 elementary teachers voluntarily responded to the electronic School Culture Survey during the quantitative phase. Analysis of these surveys yielded means, produced factor scores, and identified discrepant areas. Two administrators, five 4th grade teachers, and four ELL teachers were invited and were interviewed to collect and analyze data in the qualitative phase. The thematic coding of the data identified teacher collaboration, collaborative leadership and perceptions of school culture as deficient in the school. The subsequent project, a position paper based on the findings, informed school leadership of the results and potential benefits a regional examination of school culture could provide. Improving school culture can allow teachers and administrators to better serve an underachieving student population; an improved culture could consequently contribute to positive social change for these ELLs

Stratospheric dynamics and transport studies

A three dimensional General Circulation Model/Transport Model is used to simulate stratospheric circulation and constituent distributions. Model simulations are analyzed to interpret radiative, chemical, and dynamical processes and their mutual interactions. Concurrent complementary studies are conducted using both global satellite data and other appropriate data. Comparisons of model simulations and data analysis studies are used to aid in understanding stratospheric dynamics and transport processes and to assess the validity of current theory and models

Growth of Disturbances in a Flame-Generated Shear Region

Results are presented of an experimental and theoretical investigation of the growth of transverse velocity disturbances in the shear region caused by a flame in a duct. In the theoretical stability analysis, a flow field arising from a flame in a duct was analyzed. The flow was neutrally stable to symmetric disturbances and unstable to antisymmetric ones. In the experimental part of the program disturbances of various frequencies were imposed on a flame stabilized in a duct, and the effects were measured by shadow photography and photomultiplier-probe surveys