Archive for Normandy

X Fall²⁶ World Tour

Posted in Running, Statistics, Travel with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on September 21, 2026 by xi'an

As you may have noticed from previous entries, over the past three weeks I have been almost constantly travelling, with various but mostly large amounts of luck in my travels.

Starting with a Paris-Marseille round trip for our daughter birthday, where both trains ran on time with operational WiFi and Air conditioning (and the inevitable noisy junior passengers commuting back from their vacations).

Followed a few hours later by a Paris-Lugano round trip where again the stars aligned since the flight to Milano Malpensa was on time and landed 20mn before the only direct (flexi)bus to Lugano departed. Again in time. On the way back I had to leave right after my talk (apologies!) but got a direct (if slow) train to Milano and hopped the push via Montenapoleone (!) between two Milano metro lines to reach Milano Linate with one hour to go. On time again.

One day at home to sort various pump issues (from fixing all car injectors to replacing a drainage pump that failed to stop a massive rainstorm from entering our basement, to a flat bike tyre returning from PariSanté Campus) and then a quick weekend drive to Argentan, Normandy, for which the car managed and the traffic was surprisingly smooth for the last weekend of the national August vacation break), and where I enjoyed a long run in the woody hills, one month or so prior to the Argentan half-marathon, 30 years from my first participation. Enough time back home to cook a fresh, Norman, rhubarb preserve and off to to Durham, Northumbria, by another smooth, on-time, flight, with the small hitch of the RER B—just back from being closed for an entire month—unexpectedly finishing one station too early (and a particularly noisy family returning from one amusement park). And the same on the return, via Newcastle with a glimpse from the train of the Tyne and its iconic bridge. Reminding me of my visit there for the RSS meeting in 2013, travelling with Jim Hobert.

One more day at home and at work (teaching my first Monte Carlo class of the semester) and I was back in Charles de Gaulle airport for the flight to Tokyo Haneda. With enough time to have a second breakfast in the lounge and leave my phone on my seat!, fortunately recovered a few frantic minutes later. The flight took one hour less than expected, thanks to favourable winds, with the hitches of having no AC power plug available on the plane and no Wifi on either phone or laptop, a nuisance on a 12h day flight with a talk to polish. Going through customs at Haneda was even smoother than “usual” and I only took one wrong train on my way to Yokohama. (Which happened again the next days until I decided to stick Google map schedules, which are highly accurate and constantly updated). The only hitch of the trip was the attempt at bullet summiting Fuji-san, unsurprisingly as with most of my bullet attempts!, because the weather conditions were horrendous to the point of wardens turning people off at the entry of the Yoshida path and also to the point of inducing landslides on the unique route conducting to the 5th station. I thus got stuck there with 1600 people for a few hours until the route was reopened and the shuttle restarted, obviously with some further delays in entering the (third) bus, with more confusion and jostling than usual in Japan (but also with a large proportion of foreign hikers!). Taxis were not responding either and before the news came of the reopening I was getting worried about missing my flight! While the return saw no seamless connections and no express trains, leading to a total trip time close to 5 hours, incl. a cold soba stop at a station, I still managed to reach my Haneda hotel at check-in time and to have an intense training session on their treadmill to make up for the missing 15km and 1400⁺ climb. (Rescheduling my direct bus ticket on-line proved impossible from my phone without a local help as automated translation does not work with images.) The flight back to Paris went very smoothly by the Eastern route over the pole, with AC power (making my external battery delivered by amazon.jp fortunately superfluous since it is prohibited to use on AF flights) and Wifi running. Making my working on the paper associated with the Akaike lecture way more efficient.

Pegasus half-marathon meltdown [01:30:07 – 245/5176 – 2/59 M6M]

Posted in pictures, Running, Travel with tags , , , , , , , , , , , , , , , , , on June 9, 2026 by xi'an

Huge disappointment with this favourite race of mine! It is unclear what caused my underperforming this time, since I had trained regularly for two months, with many long distance runs and several intensity ones, weekly. The temperature was mild, the constant wind none too strong, but I slowed down almost from the beginning… And could not keep up with the 1h30 pacers when they passed me 5km before the finish line (even though they were running faster than the 1h30 target!). Lack of rest the final week? A fast 12km bike ride to the Saint-Lazare train station the previous day (in order to avoid the nightmare of getting back to Caen train station on race day)? Too much weight loss the last two weeks? Too long a warm-up run the same morning? Need of gels mid-race? The most frustrating is that I would have ended first in the previous category (M5M).

Pointe-du-Hoc, the deadly cliff

Posted in Books, pictures, Statistics, Travel with tags , , , , , , , , , , , on January 27, 2026 by xi'an

f.k.a. Église Saint-Pierre d’Engranville

Posted in pictures, Running, Travel with tags , , , , , , , , , , , , , on January 10, 2026 by xi'an

renewable energy [book review]

Posted in Books, Kids, Travel with tags , , , , , , , , , , , , , , , , , , , , , , , , , , , , , on December 28, 2025 by xi'an

Renewable Energy (2nd edition, 2025), by Nick Jelley is part of the terrific “Very Short Introduction” series, which provides an expert introduction to a topic within 150 pages. (The OUP equivalent of the French series “Que sais-je?” that started in 1941.) The reason for the second edition, as provided by the author, is the “dramatic expansion, and fall in cost” of clean energy products. Unfortunately, it comes out just short of realising the magnitude of the backlash again renewable energy and fighting climate change launched by the second Trump administration and the ensuing added pressure on other countries to reduce further their fuel consumption.

The main sources of renewables are identified as wind, sun, and water, in a first chapter that operates as an historical recap on the evolution of energy sources and consumption. The second chapter stresses the need for renewable to fight global warming and to reverse climate change, with a rather vague discussion of the costs of producing energy from renewable. Chapter 3 focusses on (debatable) biomass, solar heat, and hydropower. Chapter 4 on wind power, with a few paragraphs on the production costs and the reluctance of local populations (that seems to be fuelled by right-wing parties). Chapter 5 is specifically about solar photovoltaïcs, deemed to be now cheaper than fossil fuels inmost countries. And substituting for deficient or inexistent large scale energy grids in some countries. And Chapter 6 deals (briefly) with other low-carbon technologies, like tidal dams (mentioning the 1966 La Rance dam near Mont Saint-Michel, Normandy, we would visit now and then when I was a kid!), wave turbines, nuclear energy, and geothermal power (both heating and providing electricity). Chapter 7 discusses renewable electricity issues with energy storage (batteries and pumped hydro storage), since most solutions cannot be fired at will. The book  addresses neither the loss in carrying electricity over long distances (as suggested p103 between Morocco and Europe, or Australia and Singapore), nor the hacking risks impacting large electricity grids. Chapter 8 switches to decarbonasing heat and transport, where heat pumps and electric vehicles are the most promising venues. Chapter 9 concludes by a more political discussion of the transition to renewable, pointing out the Chinese leadership in switching to solar and wind capacities. And the brake put on the transition by international crisis such as the Russian invasion of Ukraine that keep subsidies on fuel consumption. And make European countries divesting from this transition to invest in military budgets.

While the book manages a proper introduction to renewable energy and stays up-to-date with the current developments, I find it a bit overly optimistic on the prospect of achieving COP goals and carbon neutrality. Beyond the geostrategic issues briefly mentioned in the concluding chapter, there is no mention made of the exploding energy consumption of AIs and of the limited investments of AI companies into renewable energies… Reducing energy demand does not even occupy one page of the book (p127). Similarly, I find too little discussion of the political and human aspects of using renewables, eg photovoltaïcs and batteries, which resurfaced in the recent Chinese blockade on rare earths or coverages (as in Nature, 04 Nov 2025) on the extreme hardship of extracting minerals. Contrary to those (aspects) for massive dams affecting the local populations and in the dispute between countries or States. And also little on the environmental costs of producing and recycling both solar and wind farms, in contrast with hydroelectricity. Surprisingly, nuclear energy is evacuated in one paragraph in Chapter 2, on safety arguments. If reappearing in Chapter 6 with further concerns about the overall cost of nuclear energy.

[The usual disclaimer applies, namely that this bicephalic review is likely to appear later in CHANCE, in my book reviews column.]