Obese patients take up extra bed spaces in hospital, require more staff to treat them and need an array of super-strength equipment to withstand their weight as part of their growing burden on the NHS, physiotherapists have said.
For two-level factorials, we consider designs in N=2 (mod 4) runs as obtained by adding two runs, with a certain coincidence pattern, to an orthogonal array of strength two.
A k × N matrix A with entries from a set X of s ≥ 2 symbols is called an orthogonal array of strength t, size N, k constraints, and s levels if each t × N submatrix of A contains all possible t × 1 column vectors with the same frequency λ.
In particular, Γ is an orthogonal array of strength t if and only if F=Rt+1.
The method starts with an orthogonal array of strength 2, possibly tight, that contains mostly 2-level factors.
A covering array of strength t and order v is an N×k array over Zv with the property that every N×t subarray covers all members of Ztv at least once.
In the interim, mobilize a stunning array of strength, close streets, empty parks, slow traffic, watch the bridges and inconvenience the populace in the process -- men and women who learned long ago that in New York one has to take it as it comes.
Designs D2 and D3 are orthogonal arrays of strength 2, D1 and D4 are balanced arrays of full strength, D5 is a balanced array of strength 2, and D6 is obtained from D3 by deleting the duplicate run.
And it intends to apply these strengths across an array of software and services.
If I feel a horse needs to be ridden strongly from the front, I can put a certain rider on, or if I want someone a bit more sympathetic, there's an array of riders out there with different strengths in their armoury.
