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  1. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 09

    Pretty much the only thing this thread is now demonstrating is that the Dunning-Kruger effect is alive and well.
  2. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 07

    Although the word "exponential" was used in the report, you are right that it's a word very much misused, and I am sure the term was not used in a mathematical sense. It was just used in a lay sense to indicate that the problems would get progressively worse the longer it was left. Exponential...
  3. microwizard

    LAPD blast containment truck fails, seventeen people injured

    I guess the answer is if you have a hammer, you treat everything as a nail. If you have a box to safely blow stuff up, you put stuff in the box. Operators are rarely like engineers with a curious mind, but people who want to get the job done, and in this case return the neighbourhood to the...
  4. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 07

    If they are accurate, then why aren't they identical? If they are different, whose version is correct? Even if one witness is 100% correct in all their observations, there is no way to tell which one. Hearing is an even worse sense than sight, it can be very hard to tell exactly which direction...
  5. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 07

    Witness statements are notoriously inaccurate. What is reported in the media is rarely what the person actually said, and then you have translation issues on top. I don't believe any forensic analysis relies on them. The answers are obtained by close inspection of the rubble, which is why...
  6. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 07

    The mini dozer was fighting a losing battle, the water level continued to rise, apparently coinciding with high tide. It is going to be interesting to see what the foundations look like under that slab.
  7. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 05

    No more than 1 story. As you have seen the analysis on youtube by Building Integrity, you have seen he accounts for all the upper floors - there is no collapsed penthouse, it is right there in the image. We can't see well enough to see that the parapet wall is still there, but it is not...
  8. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 05

    No, analysis shows the whole section has shifted down by the time the video starts. The penthouse level has not collapsed.
  9. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 05

    The main problem with the "roof first" theory is that there is no evidence for it. At some point you have to apply Occam's razor, rather than keep adding caveats like "maybe all the people in the top floors happened to be heavy sleepers". Also there were lights on in the upper floors, so it is...
  10. microwizard

    LAPD blast containment truck fails, seventeen people injured

    Not really, they drive real slow and have a police escort. Either way, the risk of accidental detonation during transport is always lower than intentionally detonating on site.
  11. microwizard

    LAPD blast containment truck fails, seventeen people injured

    I had assumed the blast truck was for safely transporting explosives (or suspect devices) to a range where they could be detonated. I didn't realise the idea was to offer a "doorstep" service! Quite mad.
  12. microwizard

    Miami Beach, Champlain Towers South apartment building collapse, Part 02

    I would be surprised if you didn't know that interior shots are often taken with a wide angle lens which introduce distortion to the image. Unless you know what lens was used you can not rely on these images for analysis. Also, please don't leap to accuse people of being shills because they...
  13. microwizard

    300 Meter Chinese Building Starts to Shake

    Surprised me too. It looks like an earth tremor, but apparently seismic activity is already ruled out. I can't think of any other reason. It was built in 2000, so must be a rare occurrence. With my software hat on, I would say carry on and see if it happens again :)
  14. microwizard

    Hernando de Soto Bridge (I-40 Mephis)

    I am glad we are speculating about how the inspector missed an obvious clue, rather than discussing how a major bridge collapsed in operation! Possibly the "gorilla" problem? While fixated on one topic, the brain ignores others. But I would have thought an inspector would be proactively looking...
  15. microwizard

    300 Meter Chinese Building Starts to Shake

    I have been in tall buildings which gently swayed, so I was expecting something like that, but this is a faster vibration. There is another video showing the interior of the building, and objects are shaking with a similar frequency. There is no way those roof top chimneys could cause the...
  16. microwizard

    Llano River Bridge Collapse in Texas

    Climate change denial events are becoming more frequent. I wonder how much of our infrastructure will be washed away before people accept the truth. That is the real "failure and disaster".
  17. microwizard

    Soyuz program troubles

    NASA could have had a replacement transport system in place, if they had the focus, direction and funding. The Shuttle was a compromise design trying to meet multiple requirements and contained design flaws from the start. NASA suffers the problem of getting wildly changing goals with each new...
  18. microwizard

    Kids trapped in a cave

    All this Musk hate doesn't seem to be much to do with engineering. Kinda ironic, since Musk is criticized for making a personal attack, but it's ok when Musk is the subject? Anyway, what goes on twitter is best left on twitter.
  19. microwizard

    Self Driving Uber Fatality - Thread II

    The Tesla software supports the case where there is a lane marking visible on only one side, the lack of a second lane marking isn't necessarily an error. In the case of lane markings diverging, how does the software know _which_ lane marking is the "right" one to follow? Either one could be...
  20. microwizard

    Self Driving Uber Fatality - Thread II

    I have been following the progress of self driving cars since the DARPA challenge DARPA Grand Challenge in 2004. It's interesting because it's the first widespread application of AI in a largely uncontrolled real world environment. Road vehicle fatalities are a big killer, and anything to...

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