Archive for car

significant changepoint? [poor statistics]

Posted in pictures, Statistics, Travel with tags , , , , , , , on May 5, 2021 by xi'an

A rather short-shighted item of news in Libération on road deaths rising in March 2021 for the first time since the beginning of lockdown in March 2020. The increase is by 22 persons, which is arguably not statistically significant (although terribly significant for the victims and their families) and somehow to be expected when considering the figures are averages over 12 months, hence representing the new volume of driving induced by the lockdown measures like work-at-home, closed schools, cancelled winter vacations. At best the following figures should see a plateau. More globally, this huge dip in the number of deaths, bringing us back to the 1920’s figures!,  is to be celebrated, alas with no prospect that this lower rate will resist a return to higher levels of activity.

A series of mechanical mishaps

Posted in Running with tags , , , , , , , on March 7, 2011 by xi'an

The past week saw the coincidence of a series of mechanical problems on the home front:

  • I was diagnosed with a meniscus tear after an MRI, presumably due to years of jogging although it only started to feel painful after Adap’skiii…. This was treated by an cortisone injection in the knee (addressing the inflammation hopefully for a few years but not the tear).
  • My bike back-wheel axis broke, which means I biked back home with the brake on! Good training! (And it does not hurt the knee!) Changing this wheel will cost me the equivalent of a full tank of gas, i.e. at least forty round trips to my office…
  • My Macbook video card broke down on Monday night, meaning truly no access to the data even with an external screen. (I wonder if this is yet another effect of the Philadelphia tea party!) Fortunately, this was right after my weekend backup so only a day of work on the Jaynes‘ slides is inaccessible. Fortunately too, the newer Macbook was already equipped with Kubuntu 10.10 and the switch was easy, except for having to use a mouse for the first time in ten years! As reported in this earlier post, the system works almost perfectly, with only the microphone and the wireless mouse not operational… If I could use the touch-pad for cut&paste, it would be perfect. Anyway, I should get my 2007 Macbook early this week with a new video card, courtesy of Apple despite the warranty having run out!
  • My radio stopped broadcasting the national public radio on Saturday evening for about half an hour. I found only the next day that this was due to an incredible…series of coincidences and accidents at the national public radio that stopped all broadcasting for half an hour! Nothing related with my own radio then.
  • My car thermometer started giving impossibly low temperatures, by a factor of -10⁰C or so… This is a very minor bug and an interesting calibration problem: I will try to check whether the discrepancy is reliable enough to build a correcting function!