Category Archives: Uncategorized

Astro ph round up: quantile regression and model emulation …

Two recent arXivals to catch up on here, aided in part by a more-than-usually-tedious bus journey from Witney to Oxford this morning (the culprits being ongoing road works in Witney and excess traffic attracted by filming of the Countryfile tv … Continue reading

Posted in Uncategorized | Leave a comment

P-values, sigmas, LRTs, and Chi-sq tests …

I’ve been thinking a lot recently about non-Bayesian hypothesis testing, in part because my reading has taken me to a number of particle physics papers in which the likelihood ratio test (LRT) is very often the tool of choice for … Continue reading

Posted in Uncategorized | Leave a comment

Generative Adversarial Networks for Cosmology …

Earlier this week I was up in London for the Statistical Data Science 2017 conference organised by Imperial College London and hosted by Winton Capital. Naturally quite a few of the talks focussed on machine learning methods and Gaussian processes. … Continue reading

Posted in Uncategorized | Leave a comment

A Bayesian indirect inference for the binary fraction in Leo II …

A recent arXival by Spencer et al. presents a Bayesian analysis of radial velocity data for the binary fraction in (the ultra faint dwarf galaxy) Leo II in which the inference proceeds by comparison of mock datasets against the observed … Continue reading

Posted in Uncategorized | Leave a comment

Modelling cluster profiles …

I spent last week in Paris visiting the Institut Pasteur for a Gates Foundation workshop organised to focus thinking around the problem of designing a Target Product Profile for a ‘commercial’ malaria serology test.  On my journey back I read … Continue reading

Posted in Uncategorized | 1 Comment

Emulators and process convolutions …

I read two interesting papers recently: the first from astro ph was by Kern et al., entitled “Emulating Simulations of Cosmic Dawn for 21cm Power Spectrum Constraints on Cosmology, Reionization, and X-Ray Heating“.  The type of emulator approach described in … Continue reading

Posted in Uncategorized | 1 Comment

Daleks vs MultiNest …

A recent paper on the arXiv that caught my attention was this one by entitled Accelerated Parameter Estimation with DALE by Daniel & Linder (2017), in which the authors present a code for determining confidence contours on model parameters for which … Continue reading

Posted in Uncategorized | Leave a comment