He succeeded in cultivating international collaborative research teams before the Internet existed. His two honorary doctorate degrees from universities in South Africa and Poland and four honorary professorial appointments at universities in China are a testament to this work.
During his 47 years at the U, he has produced more than 600 publications, won millions of dollars in federal funding through grants and contracts and secured more than 30 patents that have provided more than $750,000 in income to the U, making him one of the largest royalty earners for the university. In 1993, he was elected into the National Academy of Engineering, one of the highest honors bestowed up on an engineer.
He is perhaps best known for his research contributions associated with the processing of mineral and energy resources, with patents on the processing of oil sands, resin recovery from Utah coal and air-sparged hydrocyclone technology. Miller and his research group have launched a number of new areas in mineral processing research, including the flotation chemistry of mineral surfaces and the 3-D characterization of multiphase particulate systems using X-ray microtomography.