1. School of Mathematics and Statistics, Newcastle University, Newcastle upon Tyne NE1 7RU, U.K. tom.nye@ncl.ac.uk
2. Department of Mathematics, Texas A&M University, College Station, Texas 77843, U.S.A. xiaoxian@math.tamu.edu
3. Department of Mathematics, University of Hawaii at Hilo, Hilo, Hawaii 96720, U.S.A. gradysw@hawaii.edu
4. Department of Operations Research, Naval Postgraduate School, Monterey, California 93943, U.S.A. ryoshida@nps.edu