Archive for the Mountains Category

Rifugio Vittorio Sella al Lauson

Posted in Kids, Mountains, pictures, Travel with tags , , , , , , , , on August 28, 2016 by xi'an

valnontey valleyTo sort of make up for the failed attempt at Monte Rosa, we stayed an extra day and took a hike in Vale d’Aosta, starting from Cogne where we had a summer school a few years ago. And from where we started for another failed attempt at La Grivola. It was a brilliant day and we climbed to the Rifugio Vittorio Stella (2588m) [along with many many other hikers], then lost the crowds to the Colle della Rossa (3195m), which meant a 1700m easy climb. By the end of the valley, we came across steinbocks (aka bouquetins, stambecchi) resting in the sun by a creek and unfazed by our cameras. (Abele Blanc told us later that they are usually staying there, licking whatever salt they can find on the stones.)

steinbocks near Colle della Rossa, Aosta, Jul 16, 2016 near Rifugio Vittorio Stella, Aosta, Jul 16, 2016

The final climb to the pass was a bit steeper but enormously rewarding, with views of the Western Swiss Alps in full glory (Matterhorn, Combin, Breithorn) and all to ourselves. From there it was a downhill hike all the way back to our car in Cogne, 1700m, with no technical difficulty once we had crossed the few hundred meters of residual snow. And with the added reward of seeing several herds of the shy chamois mountain goat.

end of the plateau, Rifugio Vittorio Stella, Aosta, July 16, 2016Except that my daughter’s rental mountaineering shoes started to make themselves heard and that she could barely walk downwards. (She eventually lost her big toe nails!) It thus took us forever to get down (despite me running to the car and back to get lighter shoes) and we came to the car at 8:30, too late to contemplate a drive back to Paris.

view from Colle Della Rossa, Aosta, July 16, 2016

MCqMC 2016 [#4]

Posted in Mountains, pictures, Running, Statistics, Travel, University life with tags , , , , , , , , , , , , , , on August 21, 2016 by xi'an

In his plenary talk this morning, Arnaud Doucet discussed the application of pseudo-marginal techniques to the latent variable models he has been investigating for many years. And its limiting behaviour towards efficiency, with the idea of introducing correlation in the estimation of the likelihood ratio. Reducing complexity from O(T²) to O(T√T). With the very surprising conclusion that the correlation must go to 1 at a precise rate to get this reduction, since perfect correlation would induce a bias. A massive piece of work, indeed!

The next session of the morning was another instance of conflicting talks and I hoped from one room to the next to listen to Hani Doss’s empirical Bayes estimation with intractable constants (where maybe SAME could be of interest), Youssef Marzouk’s transport maps for MCMC, which sounds like an attractive idea provided the construction of the map remains manageable, and Paul Russel’s adaptive importance sampling that somehow sounded connected with our population Monte Carlo approach. (With the additional step of considering transform maps.)

An interesting item of information I got from the final announcements at MCqMC 2016 just before heading to Monash, Melbourne, is that MCqMC 2018 will take place in the city of Rennes, Brittany, on July 2-6. Not only it is a nice location on its own, but it is most conveniently located in space and time to attend ISBA 2018 in Edinburgh the week after! Just moving from one Celtic city to another Celtic city. Along with other planned satellite workshops, this occurrence should make ISBA 2018 more attractive [if need be!] for participants from oversea.

Assistant Professor position @ WU

Posted in Mountains, Statistics, Travel, University life, Wines with tags , , , , , , , on August 15, 2016 by xi'an

wien2There is an opening for an assistant professor non-tenure position in Vienna, WU, in Sylvia Früwirth-Schnatter’s group. With deadline September 7, 2016. The requested profile is

– PhD in applied mathematics or in statistics with a strong mathematical background
– Enthusiastic interest in research in Bayesian statistics, exemplified through publications in international journals in topics including, but not limited to, Bayesian non-parametric methods, Bayesian inference for high-dimensional and complex data, Bayesian time series analysis and state space modelling, efficient Markov chain Monte Carlo methods
– Interest in applications in economics, finance, and business
– Excellent programming skills (e.g. in R or Matlab)
– German language skills are not a prerequisite

Here are the details for those interested in this exciting opportunity!

Mount Shasta

Posted in Kids, Mountains, pictures, Travel with tags , , , , , on August 14, 2016 by xi'an

Dolason Prairie

Posted in Kids, Mountains, pictures, Travel with tags , , , , , , on August 11, 2016 by xi'an

even dogs in the wild

Posted in Books, Mountains, Travel with tags , , , , , , , on August 10, 2016 by xi'an

A new Rankin, a new Rebus! (New as in 2015 since I waited to buy the paperback version.) Sounds like Ian Rankin cannot let his favourite character rest for his retirement and hence set in back into action, along with the new Malcom Fox [working in the Complaints] and most major characters of the Rebus series. Including the unbreakable villain, Big Ger Cafferty. This as classical as you get, borrows from half a dozen former Rebus novels, not to mention this neo-Holmes novel I reviewed a while ago. But it is gritty, deadly efficient and captivating. I read the book within a few days from returning from Warwick.

About the title, this is a song by The Associates that plays a role in the book. I did not this band, but looking for it got me to a clip that used an excerpt from the Night of the Hunter. Fantastic movie, one of my favourites.

Forte di Bard

Posted in Kids, Mountains, pictures, Travel, University life, Wines with tags , , , , , , , , , , , , on August 4, 2016 by xi'an

After our aborted attempt at Monte Rosa, Abele Blanc treated us to a quick visit to Forte di Bard, a 19th Century military fortress in the Valley of Aosta [a first version of which was razed by Napoleon’s troops in 1800] on top the medieval village of Bard. Ironically, the current fortress never saw action as Napoleon’s siege was the last invasion of the kingdom of Savoy by French troops.

The buildings are impressive, so seamlessly connected to the rock spur that supports them that they appear to have grown out of it. They reminded me of Vauban’s fortresses, with the feeling that they were already outdated when they got built. (On the French Savoy side, there is a series of fortresses that similarly faced no battle as they were designed to keep the French out, becoming overnight useless when this part of Savoy was ceded to France in exchange for its support of the unification of Italy. For instance, there is such a fort in Aussois, which now houses an hostel, a gastronomical restaurant [we enjoyed at O’Bayes 03], and a via ferrata…)

The fortress has been recently and beautifully renovated with the help of the Italian State and of the European Union. It houses conferences and art exhibits. Like those on Marc Chagall and Elliot Erwitt that we briefly saw, missing the massive museum of the Alps… A few dozen kilometers from Torino, it would be a perfect location for a small workshop, albeit not large enough for a future MCMski.

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