Archive for Normandie

Ivanoël! [jatp]

Posted in Kids, pictures, Travel with tags , , , , , , , on February 11, 2018 by xi'an


snapshot from Cabourg [jatp]

Posted in pictures, Travel with tags , , , , on June 1, 2017 by xi'an

art brut

Posted in pictures, Running, Travel with tags , , , , , , , , , on October 22, 2016 by xi'an

Norman sunrise [jatp]

Posted in pictures, Running, Travel with tags , , , , , on October 16, 2016 by xi'an

Caen hospital [jatp]

Posted in Kids, pictures, Travel with tags , , , , on October 9, 2016 by xi'an

Argentan half-marathon 2016 [1:23:28-23/380-V2 2/74-16⁰]

Posted in Running, Travel, Wines with tags , , , , , , , , , , , , on October 2, 2016 by xi'an

And yet another Argentan half-marathon! Which started this blog, so to speak, 8 years ago… Although I could not repeat my feat at the San Francisco half-marathon, as I had lost my high altitude benefits, I managed well enough, with a good overall time of 1:23:28 and a second place in the V2 category, once again. I gained more than one minute from last year time, despite a strong face wind and thanks to sticking to a small group of younger runners. This is one of my best times since the start of the blog in 2008, so I am clearly very happy with the result. And plan to celebrate tonight with a top Montpellier wine!

same data – different models – different answers

Posted in Books, Kids, Statistics, University life with tags , , , , , , , , , on June 1, 2016 by xi'an

An interesting question from a reader of the Bayesian Choice came out on X validated last week. It was about Laplace’s succession rule, which I found somewhat over-used, but it was nonetheless interesting because the question was about the discrepancy of the “non-informative” answers derived from two models applied to the data: an Hypergeometric distribution in the Bayesian Choice and a Binomial on Wikipedia. The originator of the question had trouble with the difference between those two “non-informative” answers as she or he believed that there was a single non-informative principle that should lead to a unique answer. This does not hold, even when following a reference prior principle like Jeffreys’ invariant rule or Jaynes’ maximum entropy tenets. For instance, the Jeffreys priors associated with a Binomial and a Negative Binomial distributions differ. And even less when considering that  there is no unity in reaching those reference priors. (Not even mentioning the issue of the reference dominating measure for the definition of the entropy.) This led to an informative debate, which is the point of X validated.

On a completely unrelated topic, the survey ship looking for the black boxes of the crashed EgyptAir plane is called the Laplace.