A Howell design admitting A51

Sequencings and Howell Designs

Howell Designs with Sub-designs

A Howell design of side s and order 2n, or more briefly an H(s, 2n), is an s x s array in which each cell is either empty or contains an unordered pair of elements from some (2n)-set V such that (1) every element of V occurs in precisely one cell of each row and each column, and (2) every unordered pair of elements from V is in at most one cell of the array. It follows immediately from the defi...

Grosse and R . Rodney Howell

BACKGROUND: Although newborn screening for critical congenital heart disease (CCHD) was recommended by the US Health and Human Services Secretary’s Advisory Committee on Heritable Disorders in Newborns and Children to promote early detection, it was deemed by the Secretary of the HHS as not ready for adoption pending an implementation plan from HHS agencies. OBJECTIVE: To develop strategies for...

How to construct a block design with block size four admitting a blocking set

1. Introduction. Since this is a survey paper on blocking sets in block designs, the definition of a block design seems an appropriate beginning. So, here goes. A block design of index A is a pair (p, B), where P is a finite set (the elements of which are sometimes called points) and B is a collection of subsets of P (all of the same size k) called blocks such that every pair of distinct elemen...

Howell-Jolly body-like inclusions in neutrophils.

A 40-year-old HIV-positive man was evaluated for fatigue, weakness, fever, and cough. He was not taking any medications. His blood count showed normocytic anemia, leukopenia, and thrombocytopenia (hemoglobin 85.0 g/L, mean corpuscular volume 99 fL, white blood cell count 1.9 109/L, platelets 50 109/L). His CD4 count was 0.05 109/L. Other laboratory tests showed normal B12, folate, thyroid, and ...