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Michael McAlpine is an associate professor of mechanical engineering at the University of Minnesota , where he researches 3D printing functional materials .. University of Minnesota. University of Minnesota. 3D printing. 3D printing. He was formerly an assistant professor of aerospace engineering at Princeton University , where he conducted research on materials capable of generating power from human motion .. Princeton University. Princeton University. He has a BS from Brown University , an MA and a Ph.D. from Harvard University , all in chemistry .. Brown University. Brown University. Harvard University. Harvard University. chemistry. chemistry. In 2010 he was included in the MIT Technology Review 's TR35 list .. TR35. TR35