I work along side Dan at DuPont Research for a couple years where we got to be great friends. I have always been impressed and amazed at the scope and depth of the seemingly endless list things that he knowledge of. I learned a lot from Dan. We especially loved sharing our interest in music, of all kinds, some of which he introduced me to that I treasure to this day. Hardly a week went by that he did not bring into our lab some CD that he just added to his no doubt vast library. A great loss to everyone who knew Dan and even to those who had not yet made his acquaintance.