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Acknowledgment: Partial support for this work was provided by the National Science Foundation's Transforming Undergraduate Education in Science (TUES) program under Award No. 1140457 to Drs. A. Marquez, W. Zhu and J. Yoo. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.