Bulletin of the American Physical Society
80th Annual Meeting of the APS Southeastern Section
Volume 58, Number 17
Wednesday–Saturday, November 20–23, 2013; Bowling Green, Kentucky
Session GE5: Partnering with Industrial Physicists' Poster Session |
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Chair: Crystal Bailey, APS Room: Ballroom A |
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GE5.00001: Acoustics of a Helmholtz Resonator Maxwell Henry NASA Langley Research Center developed the software package OVERFLOW to solve the time-dependent, Reynolds-averaged, Navier-Stokes equation using multiple overset structured grids. The accuracy of the algorithm used in OVERFLOW permits the study of acoustics better than commercial software. To test the accuracy of acoustic prediction of OVERFLOW, the acoustic data from NASA scientist Patricia Block's cavity research will be compared to 2- and 3-dimensional models. This project will focus on simulating 2- and 3-dimensional computational models of the Helmholtz Resonator and comparing them to theoretical results. [Preview Abstract] |
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GE5.00002: Neutron Detection with Plastic Scintillators Zachary Bergstrom |
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GE5.00003: The flow-driven picture of molecular cloud formation: A parameter study of the effects of shear on hydrodynamic instabilities and star formation Christina Haig, Fabian Heitsch, Jonathan Carroll In recent years a flow-driven picture of molecular cloud formation has been presented to explain the narrow age spread of stellar clusters in the solar neighborhood. In this scenario clouds of molecular hydrogen form in the shock boundary between two supersonic streams of atomic hydrogen on scales of tens of parsecs, due to thermal, gravitational, and non-linear thin shell instabilities. These instabilities lead to simultaneous local collapse across the length of the cloud, forming dense cores and stars within a few shock-crossing times. In recent simulations of head-on collisions, observable parameters such as age spread and star formation efficiency have been indirectly measured and found to be relatively accurate. In an effort to extend the robustness of these investigations, our work includes the effects of shear; a reasonable expectation in the interstellar medium. In our work we find that shear flows can inhibit global and local collapse, but still permit the formation of dense cores due to breakup of the shock boundary. Final stellar angular momentum distribution and star formation rates are compared, as well as post-processing of data to form CII maps. These simulations are done in AstroBEAR, a magnetohydrodynamic code with adaptive mesh refinement and self-gravity. [Preview Abstract] |
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GE5.00004: Interfaces for Organic Electronics Cortney Bougher |
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GE5.00005: Photothermal property of plasmonic nanoparticles and its application in polymer processing Somsubhra Maity |
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GE5.00006: Microfabrication of Gated Diamond Field Emitter Arrays Jyotirmoy Mandal |
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GE5.00007: Investigation of low-cost Cu2O-CuI based photovoltaic devices with near infrared response Ryan Landry, P.K.D.D.P. Pitigala, Ajith DeSilva, A.G.U. Perera Recently there has been a growing interest in thin films formed from low-cost, non-toxic semiconducting materials due to the promise shown for use in a wide variety of applications ranging from solar cells to environmental purification. In this study, we form n-type copper (I) oxide (n-Cu2O) thin films by boiling copper electrodes in copper (II) sulfate (CuSO4) solutions of varying molarity. Thin films of p-type copper (I) iodide (p-CuI) are then formed over the n-Cu2O films - thus completing p-n heterojunctions that are studied as photon-detecting devices with near infrared response. The devices have a final configuration of glass/FTO/Cu/n-Cu2O/p-CuI/graphite-FTO/glass. We characterize these devices via responsivity, capacitance-voltage (CV), and ultraviolet-visible-near infrared (UV-VIS-NIR) spectroscopy measurements. A peak photoresponsivity of 75mA/W at 575nm and 1mA/W at 943nm is observed at room temperature. The response data also indicates a variation in device response with film thickness -- we are making efforts to optimize these films to increase performance. [Preview Abstract] |
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GE5.00008: Bamboo Strength based on Drying Technique Jonathan Hendricks . [Preview Abstract] |
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