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Undergraduate Research Opportunities Program

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Now showing 1 - 10 of 34
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Experimental Plasmatron Heat Flux Measuring Techniques Study

2009-11-09 , Vaden, Sarah

Ground testing for hypersonic re-entry vehicles is an invaluable methodology to vehicle conception. The Von Karman Institute plasmatron is a facility that can duplicate the localized aerothermodynamic properties and conditions experienced on atmospheric reentry. Because of its relevance to design oriented testing activities, accurate heat flux measurements are crucial. Therefore this study addressed the heat flux measuring capabilities of two different temperature sensors. Experimentally, two calorimeters, (one with type K thermocouple only and the other with both thermocouple and PT100), were tested under a range of typical Plasmatron operating conditions. An inversion of the calorimeters was also performed for comparison and cross checking within the facility. Namely increased air mass flow had a thinning effect on the error differences between the two sensors. Further, there were no systematic differences between the two calorimeters (i.e. thermocouple heat flux from calorimeter A compared to calorimeter B). For the main experiment, thermocouple heat flux measurements were always higher than PT100. The inversion of the two calorimeters, however, showed a reversal of heat flux ordering as a result of aggravated the inlet thermocouple sensor readings. A case study was performed to test for grounding effects on sensor behavior, concluding that direct sensor grounding is not a source of increased temperature readings

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The Tower

2009-11-09 , Weigel, Emily

What is The Tower? How to submit, work for, and find The Tower across campus.

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Woodshop as Soulcraft

2009-11-09 , Buffardi, Derek

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Assistive Technology: The Application and Rhetoric of Cochlear Implants [2009]

2009-04-01 , Chatel, Lindsay

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Improvisation and Technical Innovation

2009-11-09 , Lefton, Lew

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What Would Thoreau Do?

2009-11-09 , Lesniewski, Victor

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Molecular midwives: The solution to strand cyclization in the pre-RNA world

2009-11-09 , Chen, Michael

In recent years, the RNA-world hypothesis has become the leading theory for the origins of life. Few researchers, though, believe RNA could have spontaneously appeared out of the primordial soup. Regardless of the speculation about what could have preceded RNA, any origins of life theory would have one seemingly insurmountable obstacle: strand cyclization. Due to the flexibility of RNA-like or DNA-like polymers, a strand growing in solution would not grow much longer than 4 units, which is a problem because genes are usually hundreds, if not thousands, of units long. However, intercalator "planar molecules that slip between base pairs" increase the stiffness of the polymer thereby promoting linear growth. Using tetra-nucleotides as the model system and varying intercalators, we show that intercalators are the solution to strand cyclization.

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Building the House: Physical Implementation of Wood Working

2009-11-09 , Marlatt, Drew

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A Year at Walden

2009-11-09 , Bohra, Kamna , Yellamraju, Siri

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Digital Performance

2009-04-15 , Dixon, Steve