Robert D. Guber ’15 studied alcoholic liver, diabetes, and obesity. Lipi Gupta ’15 worked on reducing beam emittance in the Cornell Electron Storage Ring (CESR), a 768-meter ring that is part of the Cornell High Energy Synchrotron Source (CHESS), to produce brighter s-rays. Sang Min Han ’15 examined toadfish to create a mathematical model for vertebrate vocalization. Swati Sureka ’15 engineered nucleic acid to develop DNA materials. Teresa O.