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Tajima's D is a population genetic test statistic created by and named after the Japanese researcher Fumio Tajima. [1] Tajima's D is computed as the difference between two measures of genetic diversity: the mean number of pairwise differences and the number of segregating sites, each scaled so that they are expected to be the same in a neutrally evolving population of constant size.
Tajima's D is based on the expectation that S = theta * x where x is the sum of 1/i for i from 1 to N. Thus, we turn this into a method to estimate theta by noting that theta = E(S)/x. The current version suggests that S/x part is a "normalized" version of segregating sites, and this leads to a mistake in the calculation of D in the example.
Fumio Tajima was born in Ōkawa, in Japan's Fukuoka prefecture, in 1951. [1] [2] He graduated from high school in 1970, completed his undergraduate degree at Kyushu University in 1976, and received a Master's degree from the same institution in 1978. [3]
Anthony David Smith FMedSci (born 16 September 1938) is a British biochemist and pharmacologist. Smith has spent his entire academic career in the University of Oxford . [ 1 ] [ 2 ] His research focuses on biochemical changes with disease and prevention.
David Deniston Smith is an American businessman who is the executive chairman of Sinclair Broadcast Group (SBGI) since January 2017, having been its president and CEO from September 1990 to January 2017. [2] In 2024, he acquired majority ownership of The Baltimore Sun (founded 1837) and its affiliated regional and community newspapers. [3]
Fay and Wu's H is a statistical test created by and named after two researchers Justin Fay and Chung-I Wu. [1] The purpose of the test is to distinguish between a DNA sequence evolving randomly ("neutrally") and one evolving under positive selection.
David Smith is an amateur mathematician and retired print technician from Bridlington, England, [1] who is best known for his discoveries related to aperiodic monotiles that helped to solve the einstein problem.
David Smith (born May 15, 1985) is an American professional volleyball player who plays as a middle blocker for ZAKSA Kędzierzyn-Koźle and the U.S. national team. Smith was a bronze medalist at the Olympic Games Rio 2016 , Paris 2024 and the 2018 World Championship ; the 2015 World Cup winner and a three–time Champions League winner ( 2021 ...