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A Study Of The Emergence Of Student Tacit Knowledge In Response To Environmental Images And Science Instruction, Rory J. Glass
A Study Of The Emergence Of Student Tacit Knowledge In Response To Environmental Images And Science Instruction, Rory J. Glass
Legacy Theses & Dissertations (2009 - 2024)
The purpose of this study was to identify the presence of students’ tacit understandings as they apply to environmental science content, and to discover how these understandings emerge and are viewed and interpreted by teachers. Towards that end over ten hours of classroom video was recorded and analyzed, from both large urban and smaller urban classrooms. Additionally, interviews were conducted with 15 students and two teachers to gain insight into their thinking on an array of topics related to the environment and environmental reasoning. It was hypothesized that students’ understandings and teachers’ interpretations of them may be influenced by their …
Phase Imaging Using X-Ray Optics, Bushra Kanwal
Phase Imaging Using X-Ray Optics, Bushra Kanwal
Legacy Theses & Dissertations (2009 - 2024)
Conventional x-ray imaging is a widely used imaging technique in medical diagnostics as well as material analysis. It utilizes only absorption-contrast imaging, which records intensity attenuation due to absorption. A major limitation of this technique for medical imaging is the poor contrast of weakly absorbing details in the soft tissue. Mammography and angiography are two examples where improved contrast is required. In the quest for better contrast in x-ray imaging, a number of different phase contrast imaging techniques have been explored. Phase contrast imaging offers an improvement over traditional absorption contrast because the x-ray wave field traversing an object experiences …