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Isolation index measures the degree to which people inhabit geographic units inhabited primarily by members of their own group. It is usually denoted by I. It is usually denoted by I. It varies from 0 to 1.0 and is defined as the proportion of own-group members in the unit of the average person.
The index of isolation is = = where K is the number of units in the study, A i and t i is the number of units of type A and the number of all units in i th sample. A modified index of isolation has also been proposed
where (comparing a black and white population, for example): a i = the population of group A in the i th area, e.g. census tract A = the total population in group A in the large geographic entity for which the index of dissimilarity is being calculated. b i = the population of group B in the i th area
Over time, the isolation by distance model reveals a decline in local isolation and a rise in short and long range migration and the Sandy population experienced an isolate breakdown over time. Distance plays a role in determining kinship, but becomes less significant over time as the measures of the fit of the model decline.
Locations of a few relatively well-known examples of isolated languages A language isolate is a language that has no demonstrable genetic relationship with any other languages. [ 1 ] [ 2 ] Basque in Europe, Ainu [ 1 ] in Asia, Sandawe in Africa, Haida and Zuni in North America, Kanoê in South America , Tiwi in Australia and Burushaski in ...
The Theil index is a statistic primarily used to measure economic inequality [1] and other economic phenomena, though it has also been used to measure racial segregation. [2] [3] The Theil index T T is the same as redundancy in information theory which is the maximum possible entropy of the data minus the observed entropy.
The sexual isolation between Drosophila miranda and D. pseudoobscura, for example, is more or less pronounced according to the geographic origin of the flies being studied. Flies from regions where the distribution of the species is superimposed show a greater sexual isolation than exists between populations originating in distant regions.
Say that a node v in a graph has d neighbors: then v will adopt product A if a fraction p of its neighbors is greater than or equal to some threshold. For example, if v's threshold is 2/3, and only one of its two neighbors adopts product A, then v will not adopt A. Using this model, we can deterministically model product adoption on sample ...