Search results for "F-ST"
showing 6 items of 36 documents
A geometrical framework for f –statistics
2020
AbstractA detailed derivation of the f–statistics formalism is made from a geometrical framework. It is shown that the f–statistics appear when a genetic distance matrix is constrained to describe a four population phylogenetic tree. The choice of genetic metric is crucial and plays an outstanding role as regards the tree–like–ness criterion. The case of lack of treeness is interpreted in the formalism as presence of population admixture. In this respect, four formulas are given to estimate the admixture proportions. One of them is the so–called f4–ratio estimate and we show that a second one is related to a known result developed in terms of the fixation index FST. An illustrative numerica…
Population genetic structure of the butterflyMelitaea didyma(Nymphalidae) along a northern distribution range border
1996
The population genetic structure of the butterfly Melitaea didyma was studied along the northern distribution range border in Central Germany by means of allozyme electrophoresis. Individuals were sampled from a total of 21 habitat patches from four regions, and two provinces. Sampling was designed to estimate local vs. regional differentiation. High levels of variability were found, He= 0.14-0.21. The mean expected sample heterozygosity from one region, Mosel, was significantly lower than from the Hammelburg region, He= 0.17 and 0.19, respectively. Two hierarchical levels of genetic differentiation were found. Within regions individuals sampled from different patches behaved as belonging t…
Data from: Low but contrasting neutral genetic differentiation shaped by winter temperature in European great tits
2015
Gene flow is usually thought to reduce genetic divergence and impede local adaptation by homogenising gene pools between populations. However, evidence for local adaptation and phenotypic differentiation in highly mobile species, experiencing high levels of gene flow, is emerging. Assessing population genetic structure at different spatial scales is thus a crucial step towards understanding mechanisms underlying intraspecific differentiation and diversification. Here, we studied the population genetic structure of a highly mobile species – the great tit Parus major – at different spatial scales. We analysed 884 individuals from 30 sites across Europe including 10 close-by sites (< 50 km)…
OASIS XLIFF-standardi ja sisällön lokalisointi
2013
Juuma, Matias OASIS XLIFF-standardi ja sisällön lokalisointi Jyväskylä: Jyväskylän yliopisto, 2013, 30 s. Tietojärjestelmätiede, Kandidaatin tutkielma Ohjaaja: Jauhiainen, Eliisa Tässä kandidaatintutkielmassa kuvataan sisällön lokalisointia sekä siihen liittyviä käsitteitä ja etuja. Sisällön lokalisointia esitellään eri näkökulmista ja sen hyötyjä ja ominaisuuksia on pyritty selventämään. Sisällön lokalisointia kuvataan niin organisaation näkökulmasta kuin myös käyttäjän eli sisällön kuluttajan näkökulmasta. Erilaisia standardeja on myös esiteltynä, jotta saataisiin vertailukohtia tämän tutkielman toiseen osaan eli XLIFF-standardiin. XLIFF-standardista annetaan yleiskuva siitä millainen sta…
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
2017
On August 17, 2017 at 12-41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0×104 years. We infer the component masses of the binary to be between 0.86 and 2.26 M, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17-1.60 M, with the total mass of the system 2.74-0.01+0.04M. The source was localized within a sky region of 28 deg2 (90% probabili…
Spējīgu skolēnu patstāvīgas mācīšanās kompetences veicināšana angļu valodas stundās pamatskolā 8.klasē
2019
Diplomdarba autore: Inese Reisa. Diplomdarba nosaukums: Spējīgu skolēnu patstāvīgas mācīšanās kompetences veicināšana angļu valodas stundās pamatskolā 8.klasē. Darbā tiek pētīta skolēnu patstāvīgās mācīšanās kompetence un tās pilnveides iespējas angļu valodas apguvē 8.klašu skolēniem. Pētījums veikts Kuldīgas 2.vidusskolā ar mērķi teorētiski pamatot un praktiski pārbaudīt nosacījumus patstāvīgas mācīšanās kompetences sekmēšanai darbā ar spējīgiem skolēniem. Pētījuma teorētiskās daļas 1.nodaļā formulēta patstāvīgas mācīšanās kompetences un mācīšanās spēju būtība. 2.nodaļā noteikti kritēriji patstāvīgas mācīšanās kompetencei 8. klasē, 3.nodaļā raksturotas patstāvīgas mācīšanās kompetences sek…