Archive for the pictures Category

Bayesian maps of Africa

Posted in pictures, Statistics with tags , , , , , , on March 21, 2018 by xi'an

A rather special issue of Nature this week (1 March 2018) as it addresses Bayesian geo-cartography and mapping childhood growth failure and educational achievement (along with sexual differences) all across Africa! Including the (nice) cover of the journal, a preface by Kofi Annan, a cover article by Brian Reich and Murali Haran, and the first two major articles of the journal, one of which includes Ewan Cameron as a co-author. As I was reading this issue of Nature in the train back from Brussels, I could not access the supplementary material, so could not look at the specifics of the statistics, but the maps look quite impressive with a 5×5 km² resolution. And inclusion not only of uncertainty maps but also of predictive maps on the probability of achieving WHO 2025 goals. Surprisingly close to one in some parts of Africa. In terms of education, there are strong oppositions between different regions, with the south of the continent, including Madagascar, showing a positive difference for women in terms of years of education. While there is no reason (from my train seat) to doubt the statistical analyses, I take quite seriously the reservation of the authors that the quality of the prediction cannot be better than the quality of the data, which is “determined by the volume and fidelity of nationally representative surveys”. Which relates to an earlier post of mine about a similar concern with the deaths in Congo.

Picus viridis [jatp]

Posted in pictures with tags , , , , on March 18, 2018 by xi'an

a faint memory of ice

Posted in Books, Mountains, pictures, Running, Travel with tags , , , , , , , , , , , , , , on March 17, 2018 by xi'an


During the past week of vacations in Chamonix, I spent some days down-hill skiing (which I find increasingly boring!), X-country skiing (way better), swimming (indoors!) and running, but the highlight (and the number one reason for going there!) was an ice cascade climb with a local guide, Sylvain (from the mythical Compagnie des Guides de Chamonix). There were very options due to the avalanche high risk and Sylvain picked a route called Déferlante at the top of Les Grands Montets cabin stop and next to the end of a small icefield, Glacier d’Argentière. We went there quite early to catch the first cabin up, along a whole horde of badasss skiers and snowboarders, and reached the top of the route by foot first, a wee bit after 9 pm. A second guide and a client appeared before we were ready to abseil down, and two more groups would appear later. On touring skis. Continue reading

Brussels skyline [jatp]

Posted in University life, Running, Travel, pictures with tags , , , , , , , on March 15, 2018 by xi'an

another instance of a summer of Bayesian conferences

Posted in pictures, Statistics, Travel, University life with tags , , , , , , , , , on March 15, 2018 by xi'an

As it happens, the next MaxEnt conference will happens in London, on 2-6 July, at the Alan Turing Institute, which makes it another perfect continuation of the ISBA meeting in Edinburgh, or of the Computational Statistics summer school in Warwick the week after. But in competition with BAYsm in Warwick and MCqMC in Rennes. I once attended a MaxEnt meeting in Oxford. (Oxford, Mississippi!) Which was quite interesting in the audience it attracted and the focus of the discussions, some of which were exhilaratingly philosophical!

Winter sports [poster]

Posted in Mountains, pictures, Travel with tags , , , , , on March 11, 2018 by xi'an

Chamonix snapshot #3 [jatp]

Posted in Kids, Mountains, pictures, Running, Travel with tags , , , , , , , , , , , on March 10, 2018 by xi'an