William Brian Waring
نویسندگان
چکیده
منابع مشابه
Brian Blades , William Ford Anid
P ULMONARY ARTERY aneurysms are relatively rare lesions. One hundred and fifty-two cases have been found in world literature. The purpose of this communication is to review briefly available information on the subject and to report a case in which successful surgical treatment has been achieved. Boyd and MeGavack,' in 1939, reported 111 cases of pulmonary aneurysm proved at necropsy. In 1947, D...
متن کاملWilliam P . Hanage , Brian G . Spratt , Katherine
A central problem in understanding bacterial speciation is how clusters of closely related strains emerge and persist in the face of recombination. We use a neutral Fisher–Wright model in which genotypes, defined by the alleles at 140 house-keeping loci, change in each generation by mutation or recombination, and examine conditions in which an initially uniform population gives rise to resolved...
متن کاملWilliam P . Hanage , Brian G . Spratt , Katherine M .
A central problem in understanding bacterial speciation is how clusters of closely related strains emerge and persist in the face of recombination. We use a neutral Fisher–Wright model in which genotypes, defined by the alleles at 140 house-keeping loci, change in each generation by mutation or recombination, and examine conditions in which an initially uniform population gives rise to resolved...
متن کاملWilliam P . Hanage , Christophe Fraser and Brian G . Spratt *
Whatever else they should share, strains of bacteria assigned to the same species should have housekeeping genes that are similar in sequence. Single gene sequences (or rRNA gene sequences) have very few informative sites to resolve the strains of closely related species, and relationships among similar species may be confounded by interspecies recombination. A more promising approach (multiloc...
متن کاملFrom Fermat to Waring
The ring Zk(+, .) mod p k with prime power modulus (prime p > 2) is analysed. Its cyclic group Gk of units has order (p − 1)p, and all p-th power n residues form a subgroup Fk with |Fk| = |Gk|/p. The subgroup of order p − 1, the core Ak of Gk, extends Fermat’s Small Theorem (FST ) to mod p, consisting of p − 1 residues with n ≡ n mod p. The concept of carry, e.g. n in FST extension n ≡ np + 1 m...
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ژورنال
عنوان ژورنال: BMJ
سال: 2008
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.39455.764468.be