A few new orders for D-optimal matrices

The first examples of D-optimal matrices of orders 222, 234, 258 and 278 are constructed.Comment: 9 pages, 3 table

Linear models and D-optimal designs for n [triple bond; length as m-dash] 2 mod 4

In experimental situations where n two-level factors are involved and n observations are taken, then the D-optimal first-order saturated design is an n x n ± 1 matrix with the maximum determinant. In this paper we discuss this problem for n [triple bond; length as m-dash] 2 mod 4, we summarize all the known results, and we give some new D-optimal designs for n = 90, N = 226 and n = 362.Supplementary difference sets D-optimal designs Construction