We investigate the applicability of the median and Barker-Henderson prescriptions for obtaining spherical reference systems for three models: hard linear triatomics, hard heteronuclear dumbbells, and two-component mixtures of hard dumbbells. We propose an empirical method for determining the median potential for systems lacking a high degree of symmetry. For mixtures of hard molecules, we find ...

Several researchers have addressed the computer competencies needed by students and their teachers, and attitudes towards computers (Birkenholz & Harbstreit, 1987; Bowen, Mincemoyer & Pannley, 1983; Henderson, 1985: Miller & Kotrlik, 1987; Neason & Miller, 1982; Newman & Henderson, 1987; Trede, Russell & Miller, 1985; Zidon & Luft, 1987). Other writers have addressed the educational uses of the...

The first author, Michael C. Henderson, was a founder and served as Chairman of Albina Community Bank from 1995 until he retired at the end of 2009. He first learned about idiopathic pulmonary fibrosis (IPF) at the age of 58, when he was told that he had the disease. Ten years later, Mr. Henderson reflects on his passage through IPF in this personal narrative written with the assistance of Dani...