CL draws reloaded

Written on 14 March 2019, 04:25pm

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You have 8 teams. They will be drawn one against each other, so 4 pairs in total.

Question 1: how many distinct pair sets are possible?

105. I got to this number after running a large number of simulations. Then I did a little bit of research and I also found the formula:

k=4

Question 2: if 4 of the 8 teams are from England, what is the probability that all 4 of them will be drawn together?

Again, after analyzing the 105 distinct pair sets, I found that only 9 of them have all-English pairs. The full probability set is:

  • two English pairs: 9/105 or 8.57%
  • exactly one English pair: 72/105 or 68.57%
  • no English pair: 24/105 or 22.86%

Random links #12

Written on 12 March 2019, 09:27am

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I believe that the Airpods success can be explained by the bandwagon effect: “the rate of uptake of […] trends increases the more that they have already been adopted by others“. They slowly made their way from mockery to status symbol.

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At first sight, a bank card with a built-in fingerprint reader seems to be an excellent idea, right? You trade the PIN code (something that you know) for your fingerprint (something that you are). From an usability point of view, it’s a major step forward (PIN codes can be forgotten, misplaced, shoulder-surfed, reused, social engineered, etc). But from a privacy point of view things don’t look so good anymore. The initial plans indicate that the users still have to walk in a branch to enroll their fingerprints – which
(probably) means that the bank will get to know your biometric data. Which cannot be reset, as we all know.
A possible alternative is to ditch the bank card altogether and use something that you have with you all the time: your smartphone (see Apple Pay, Google Pay) – in addition to your biometric data which never leaves your device. But this solution is not inclusive: not everybody owns a smartphone.

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The results of this study are really sad and shows that in reality, we are far, far away from secure-by-design principles. “Researchers asked 43 freelance developers to code the user registration for a web app and assessed how they implemented password storage. 26 devs initially chose to leave passwords as plaintext ” (via)

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Read this thread in full. Brilliant

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Tesla and customer service

Written on 11 March 2019, 09:58pm

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A propos my past rants about the Tesla customer service here in Belgium, I just read this (highlights mine):

Tesla TSLA owners still love their vehicles, and the electric automaker still beats out competitors, according to a new survey by research firm Bernstein. But the company’s Achilles’ heel is its customer service.

Only 42% of customers described their service center experience as “excellent,” vs. 57% last time. Wait times for appointments have grown longer. Similar to our last survey, the service experience was especially weak outside the U.S. Perhaps most concerningly, recent service center users (those that had visited a center in the last 3 months) were less satisfied with their experience, experienced longer wait times for appointments, and had poorer rates of problem resolution — pointing to ongoing strain (and potential underinvestment?) in Tesla’s service network.

Tesla’s biggest problem is its customer service, according to a new Bernstein survey

This is spot on and it certainly applies in my case. Just a reminder, this is the breakdown of my current problems with Tesla:

  • long waiting times to get in touch with the customer service
  • asking me to pay for the replacement of the insecure key fobs or alternatively to disable the Passive Entry
  • only recording the real-time location of the car while driving (but not when someone moves it away)
  • setting up an arbitrary, unchangeable and absurd dashcam recording limit of 1 hour