Professor Avram Bar-Cohen, affectionally known to everyone as Avi, passed away on Oct. 10, 2020. Throughout his life, distressingly cut short while he remained at his peak in every respect, Avi was foremost and supremely devoted to his family, exhibited contagious and indefatigable passion while making academically seminal and industrially paramount contributions to the fields of heat transfer and electronics packaging, and zealously pursued his other diverse interests ranging from economic theory to snowmobiling. We, a small contingent of the innumerable colleagues and, without exception, friends, within Avi's vast technical network are honored and humbled to pen this heartfelt tribute to him. Anyone who has attended a lecture by Avi is familiar with his mantra of “leave the world a better place,” Tikkun Olam in Hebrew. He was, in so very many ways, profoundly successful in this endeavor. A sampling of them are described here.

Early Years. Avi was...

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