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brilliant scientist, collaborator, and educator, who pushed not only the boundaries of one’s intellect but also the boundaries of what was possible in science and technology to positively impact society. To his family and friends, he will always be known as the consummate gentleman, devoted husband, and loving father who had great integrity, wit, and an appreciation for storytelling with amazing recollection of historical facts and an understanding of diverse cultures and languages. He will continue to live in the hearts and memories of those he personally touched in meaningful ways.

Un-Chul is survived by his beloved wife of 49 years, Lee; his daughter, Audrey, and son-in-law Frank; his two younger brothers, Woon-Soo (Paul) and Woon-Seo and their families; his nephew Sang Hoon and his wife Kyung Sook; and his great-nephew Yoonha (James).

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