These assumptions are necessary to make the methods efficient enough to allow for searches of phylogenetic tree space, although they are far from guaranteed to hold for empirical datasets (e.g. [ 22]).
This database is mostly intended to run in-memory, so as to hold the whole dataset in RAM [10, 29].
The statistical guarantees for SVDquartets requires a strict molecular clock, a property that is not likely to hold on most biological datasets, especially when the species are not very closely related, and when loci are sampled from throughout the genomes.
This assumption is likely to hold in the current dataset and methods: In ALSPAC, the risk of non-response has been identified to be higher for households with male cohort children and lower socio-economic status (Boyd et al., 2012).
The WDS dataset held by NHS Wales Informatics Service (NWIS), the NHS organisation in Wales mandated to hold personally identifiable data, contains addresses for all individuals who register with a General Practitioner.
Adding additional covariates to the mapping functions, like clinical variables or dimension scores of other questionnaires may overcome this problem, but this limits the use of the function to datasets that hold all those variables.
Rather than set up its own DAC, the UK10K project drew on the pre-existing DAC already operating out of the Wellcome Trust (WT), London, to formally approve access to UK10K datasets held in the EGA.
A new licence – working title the "Charged Licence" – has been drafted for public authorities with reason to charge for the re-use of datasets they hold.
"The prize – as well as ensuring we deliver better value for money in public spending – is to drive real social and economic benefits by making it as easy as possible for businesses and other organisations to exploit datasets held by public authorities," he said.
A list of the datasets held to date is included in Table 1.
