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Archive for Chamonix

ISBA⁵

Posted in pictures, Running, Statistics, Travel, University life with tags , , , , , , , , , , , , , , , , , , , on July 4, 2026 by xi'an

After a pleasant run under the pouring rain (noisy rain that had not helped with my sleep or lack thereof), I attended both morning episodes of Calibrated Bayes, with a range of interesting, mostly novel, questions and solutions. And rekindling my interrogations about overparameterised models and model misspecification within a Bayesian framework. And the elusive notion of outliers.

The noon discussion around our report as the committee on the future of ISBA conferences went on rather well, given the circumstances, with about 50 participants with ideas and opinions on the opportunity of splitting the ISBA World into multiple hubs. And on the practical difficulties. (Despite the itch to do it, I did not intervene with my counter-objections to most of the raised objections! Nor mentioned BayesComp in Aussois.) Participants of the (unofficial) 2021 mirror in Marseille brought some welcomed support!

Daniele Durante’s Bayarri lecture on skew symmetric approximations was also attuned to the approximation spirit of the morning. The symmetrisation of the target reminded me of our (unpublished) folded method. With the (unrelated) question of the statistical meaning of a higher order Laplace expansion. And the calibration of this skewed approximation.

The final session on Cut Bayes couldn’t be missed!, since this has been an interest of mine’s since MCMSki IV in Chamonix! With an automated cut model construction by Robert Goude and an optimised choice of generalised Bayes posteriors by David Nott.

from Les Houches to Venezia, privately

Posted in pictures, Travel, University life with tags , , , , , , , , , , , , , , on March 28, 2026 by xi'an

The third ERC Synergy OCEAN privacy workshop took place in Venice rather than Les Houches, as a more convenient location for most participants and a definitely more academic and peaceful environment than the Rocky Pop psychedelic hotel! (It also helped that I was invited by the Department of Economics for that period.) Most of participants were old-timers and this helped in launching working groups and discussions from early on. Hence allowing to make more progress in exploring new directions to improve estimation efficiency under privacy (and vice-versa). In particular, our recent decision-theoretic developments proved of interest to several groups and hopefully extensions will come out, none too much in the future. And no-one fell in a canal, or in a crevasse, or ended up in the hospital this time… Grazie mille a tutti!

a journal of the cha(ca)os (and fig) year

Posted in Books, Kids, Mountains, pictures, Travel, Wines with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on October 1, 2025 by xi'an

 Read the last part of The Thousand Autumns of Jacob de Zoet by David Mitchell, which still  takes place in the early 1800’s at the Dutch East India Company trading post Dejima in Nagasaki, as the historical aspects—like the attempt by a British ship to take over the outpost—beat the weakest features of the story. The end does feel rushed.

I made my first attempt at a chocolate tablet by mixing the cocoa—cacao in French—paste (kako in Créole) I brought back from Guadeloupe—made from the cocoa seeds I had bought at the market, roasting and crushing them—with crushed biscuits and a tiny bit of butter. The result was keeping with the bitter chocolate flavour I enjoy in 100% cocoa tablets, if presumably richer in fat and sugar, and more on the chocolate biscuit side! As the fig tree is now delivering at full speed, I am making compotes and office deliveries on most days, along with picking great tomatoes (which survived the heat waves) and the second chili pepper that grew from the chili tree this summer—sadly so low on the Scoville scale that it didn’t much differ from the peppers that also grew there—. In a bountiful year, the only failure was the buckwheat attempt, since no single flower came to deliver. Expert advice is thus sought for next year! This did not prevent me from resuming cooking whey (from skyr) and buckwheat, rye, or chestnut crêpes (on the Amazon iron griddle that no longer sticks!).

Watched and enjoyed the series Dept. Q, a gritty, depressing, and engrossing detective story that mixes cold cases, domestic violence, PTSD, sexism, several levels of guilt, and a variety of Scottish accents, from Edinburgh to the Western Isles. Despite the captivity thread in the scenario that I always dislike as a weak option in this kind of story, albeit making more sense as the episodes unfold. The grey areas surrounding most characters keeps the series at quite an acceptable level of engagement, as does the range of personalities thus displayed. This includes most victims that could have fallen into the poor-dear trap, but remain ambiguous and equally guilty to maintain the balance. Looking forward new seasons (not in the Scottish sense, where most days usually cover all four of them!). Also watched the second season of Wednesday, enjoyable enough if on the light and repetitive side. With Jenna Ortega still running the show, along with a stronger presence of Catherine Zeta-Jones. Just missing the Cramps moment of Season 1!

UTMB, c’est parti/andiamo!

Posted in Kids, Mountains, pictures, Running, Travel with tags , , , , , , , , , , , , , , , , on August 25, 2025 by xi'an

a journal of the chaos (and rhubarb) year

Posted in Books, Kids, Mountains, pictures, Travel, Wines with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , on July 30, 2025 by xi'an

 Read Fjellet, geværet, vannet (A mountain, a gun, a lake) by Lars Ramslie (in French, published by the Chamonix based Paulsen editions). A perturbing recollection of a broken childhood between the Norwegian outdoors and violent parenting, in the shadow of an out-of-control father. To the point I found it rather hard to finish the book, the author (and son) being often borderline apologetic for his father’s violent outbursts. That he survived such a trauma is astounding. That local social services could not keep his father away is a shame… I also read E.M. Forster’s A Passage to India classic, while travelling to Chennai, which already reviewed in a separate post.

Beyond indulging in South Indian dishes and a never ending range of appams and local fruits, I made rhubarb preserve from a home-grown rhubarb planting, sometime supplemented with the first figs from our fig-tree and sometime augmented by farmer market sticks. Picked too hot a day to make a ceviche, despite a quick dip in lemon as I returned from the market. (No aftereffect, it just did not taste nice.) And panned an experimental monkfish liver that proved nice and ejnoyable (and with a very mild taste compared with the veal liver I had to eat once a week as a child).

Watched nothing on the flights to and from India. Not even my neighbours’ screens! But watched the Japanese TV series The Hot Spot that is rather funny if not hilarious, and on the lengthy side (esp. all the lunch meetings in Mont Blanc (!) restaurant). Still, the mundane lives of all characters, including the alien—who suffers from all too human shortcomings!—, and  the ever-present backdrop of Mount Fuji make the show worth watching for a while. (A second season feels superfluous, mind.)