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matthiasl

HN member
Joined
Wed, Apr 29, 2009, 11:33 AM UTC
HN karma
401
Public activity
88 items

About matthiasl

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Recent public activity

  1. comment
    Comment #47375056

    "What is the mechanism that increases risk for MOV-sourced fires in this arrangement?" I wondered the same thing, and failed to find a satisfying explanation. I can find plenty of …

  2. comment
    Comment #47219479

    It took me a while to realise that you were responding to the article, not a comment here. You're right in correcting the article, but I'd like to add that for probably around a de…

  3. comment
    Comment #45757786

    Right, it's TX-only. The article says so explicitly halfway through: "As before, this is a transmit-only proof of concept" I didn't notice that on my first reading.

  4. comment
    Comment #45106800

    > All the designs I know of have a pumped (active) cooling loop for the reactor, then a secondary loop where the coolant (typically water) evaporates and drives a turbine, [...] Yo…

  5. comment
    Comment #42634923

    Assuming you're refering to Hövding, the recall was overturned on appeal, back in 2023, but the company went bankrupt anyway: https://discerningcyclist.com/hovding-bankruptcy/ In s…

  6. comment
    Comment #42494081

    I looked at a London telephone book from 1979, when I think the record was released. Most of the phone numbers were something like 01 361 1234, i.e. seven digits after the 01 area …

  7. comment
    Comment #42493079

    (Author here) No contradiction. I think what happened is 1. The recording engineer dialled the operator. Could have been pulse dialling, could have been DTMF, doesn't matter. 2. Op…

  8. comment
    Comment #42489984

    659 8890 That one's just ordinary DTMF. I recorded the audio, trimmed it manually and then made a spectrogram like this: sox gun1.wav -n rate 4k spectrogram -m -y 500 The 'rate' sw…

  9. comment
    Comment #42488611

    You're right; I think CCITT5 is just another name for SS5, because different groups were writing standards. Bell called it one thing, CCITT (an international standards group) calle…

  10. comment
    Comment #42487779

    The discussion is new to me. I started analysing the audio because someone sent me a link to the film (The Wall) on youtube and asked me about the signalling. Once I'd decoded the …

  11. comment
    Comment #42486488

    Interesting. Normally, films use deliberately fictious numbers, e.g. in the US it's always xxx555xxxxxx. Wikipedia says the UK uses various area codes for the same thing, including…

  12. comment
    Comment #42485923

    Author here. Yep, 44 is the UK country code. The problem I got stuck on is that the rest of the number, 1831, didn't make sense. I assumed the number was complete, since it had the…

  13. story
  14. comment
    Comment #38316667

    There's no smoke coming out. Best guess: you're confused by the word "smokestack". Smokestack is a synonym for chimney. The power station is closed. The chimneys are still there, b…

  15. comment
    Comment #36819290

    ATM cells have 48 byte payloads. Supposedly that was because different groups involved in the standardisation process wanted either 32 or 64 byte payloads.

  16. comment
    Comment #34552814

    Not important to the conclusion or reasoning... but Stevena's post says: "the whole team working on Erlang quit and started their own company." The same event as described in "A hi…

  17. comment
    Comment #34412436

    To put some numbers on "much worse" versus "not much worse": The best window I can find from the major Danish manufacturer Velfac has a total U-value of 0.82 W/°K/m² [1]. It's a tr…

  18. comment
    Comment #33077618

    Schroedingersat> ...albedo increase... You mean _decrease_, right?

  19. comment
    Comment #32749356

    > Electric heat pumps actually don't work in very cold weather. I think that statement needs to be qualified and quantified. Qualified: your claim is probably only intended to appl…

  20. comment
    Comment #31629782

    Do you have some numbers to back your "strong" doubts? One widely cited source is the 'Lazard' report: https://www.lazard.com/perspective/levelized-cost-of-energy-... it puts onsho…

  21. comment
    Comment #24260796

    Rurban wrote: "the very best (Formula 1) at 10 KHz". how much of the above is a typo and how much is real? I'm pretty sure 'KHz' is a typo which maybe should be kHz as in the start…

  22. comment
    Comment #23005763

    > you can't just throw around numbers without explaining exactly what they mean or where they come from. In the interview, Gieseke says influenza kills 1000 to 2000 people per year…

  23. comment
    Comment #23005104

    That difference seems to arise because the report you cite uses a broad definition of influenza deaths. Page 2 says they're counting patients who "have influenza as a contributing …

  24. comment
    Comment #23004874

    I also share your concern about claims made by Gieseke. The article quotes Gieseke as saying "The real death toll, he suggested, will be in the region of a severe influenza season …

  25. comment
    Comment #22896597

    "ICU admissions [...] have very little lag." Sweden's ICU admissions number for a particular day usually takes a week or two to settle down. For instance, here's how the numbers we…