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Measurement and Passive Reduction of Vibration Transmission in String Trimmers 2010
(Dr. Jack Leifer, Howard Hughes Medical Institute Program, Trinity University)

ABSTRACT
It has been well documented that over long periods of time, people who regularly operate hand tools powered by small internal-combustion engines can become affected by a debilitating set of clinically irreversible effects, collectively referred to as hand-arm vibration syndrome (HAVS). Although HAVS cannot be cured, the onset of the disorder can be delayed or, in fact, prevented, by restricting either the duration of the exposure, and/or the magnitude of the vibration transmitted from the tool to an operator's hands and arms (per ANSI and similar standards). In this paper, we’ve evaluated an approach for reducing the magnitude of transmitted vibration at the engine-side grip of one commercial- and one consumer-grade string trimmer. The ultimate goal of this work is to develop a set of simple, passive retrofits for these tools that will reduce the likelihood of HAVS in full-time grounds-maintenance workers. The idea for this work stems from a stated need of Goodwill Industries of San Antonio, our NPA (non-profit agency) collaborator over the past several years. Based on this preliminary work, we’ve found that grips incorporating half-inch rubber studs placed at areal densities of either 25/in² or 12/in² significantly reduce the RMS vibration transmitted to the hand and arm at all frequencies (including the low frequency components known to be most harmful)

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Hydrocarbon Thin Film Evaporation 2009
(Dr. Peter Kelly-Zion, Engineering Science Department, Trinity University)

- Implemented filtered backprojection (FBP) and simultaneous algebraic reconstruction technique (SART) algorithms in MATLAB to model spatial concentration distribution of hydrocarbon vapors
- Optimized the FBP algorithm by evaluating effects of various filters on the empirical and the synthesized data

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Alternative Energy System Prototype 2009
(Dr. Gordon Mac Alpine, Physics Department, Trinity University)

- Worked in a directed research to install a data acquisition system for standalone photovoltaic solar and wind energy systems for energy production analysis
- Studied energy consumption statistics in the US and researched on alternative energy systems

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Quasars, active galactic nuclei (AGN), and Very Long Baseline Interferometry (VLBI) 2008
(Dr. David Hough, Physics Department, Trinity University)

- Completed a high-resolution radio-study project of AGN using VLBI data reduction techniques
- Studied Magneto Hydro Dynamic (MHD) models of relativistic jets emitted by AGN and tested VLBI data for the validity of jet model

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