Comments by "Lawrence D’Oliveiro" (@lawrencedoliveiro9104) on "Technology Connections" channel.

  1. 0:32 Actually, both are transducers. And any transducer can work to some degree in either direction -- the two physical systems that are coupled (air versus wood/bone/electricity/whatever) can exchange energy either way.
    1
  2. 0:30 Blue USB sockets? In 2005?!? ANACHRONISM!! (or at least time paradox)
    1
  3. Never mind format wars, how about a pronunciation war: “bay-ta” or “bee-ta”?
    1
  4. 3:09 That’s the opening to Steven Spielberg’s Amazing Stories -- not that I’ve seen the series, but I recognize it from some of the vintage CG clips here on YouTube.
    1
  5. 20:16 That would be true of simple resistive heating. Not so true of, say, heat pumps.
    1
  6. One thing I use the combo function for is, microwave to cook the chicken pieces thoroughly on the inside, simultaneously grilling to crisp the outside.
    1
  7. 11:02 Regarding the noise ... here in NZ, a couple of hours south of Auckland, I rarely need to run my portable unit at night, so that mitigates the noise issue somewhat. Also I run it most heavily for maybe 3-4 weeks of the year, during the hottest part of summer.
    1
  8. When I were a wee lad and Get Smart was being shown for the first time on local TV, I used to be taken with the clock-hand-style floor indicators outside the lifts. Do any of those still exist?
    1
  9. The EU remembers. It’s their anthem.
    1
  10. 14:58 Analog filters cannot have a sharp cutoff (without introducing phase-shift artifacts), but digital filters can. Oversampling can give you a perfectly good cutoff at a 20kHz × 2 = 40kHz sampling rate, or any other rate you want. The reason for the 44.1kHz audio CD sampling rate has to do with the original use of adapted VCR machines for the audio mastering, and the need to able to adapt both PAL and NTSC machines for the purpose. Source: John Watkinson, The Art Of Digital Audio -- I have an old edition of this and his Art Of Digital Video -- both are still well worth reading.
    1
  11. 16:03 Ah, you did know at least part of that.
    1
  12. 1:56 Or could it be “the sai of sapience”?
    1
  13. 3:28 Fourier is not complicated! (The main trouble I have with it is remembering where the π factors come in.) The wonderful symmetry between time/space-domain and frequency-domain representation of signals is just breathtakingly beautiful to behold. So there.
    1
  14. 5:15 See, nothing complicated about that, is there? ;)
    1
  15. That could be just the “ringing” he already alluded to.
    1
  16. And for CD-ROMs, there’s an extra layer of error correction on top of that.
    1
  17. 16:07 In fact, it’s the anti-green, the complementary colour to green.
    1
  18. Just a further thought, it seems to me the way the brain interprets the stimuli from the different cone types is not simply as addition of scalars, but as basis vectors pointing in different directions in a 2D plane. That’s why stimulation of red+blue is not equivalent to just green.
    1
  19. 20:00 Complex numbers FTW!
    1
  20. 5:28 Also used in computer monitors, like Apple’s legendary 13" RGB monitor from 1987 -- commonly considered to be the first colour monitor to be good enough to be used in black-and-white!
    1
  21. 11:06 Ah, you mentioned that too.
    1
  22. Have you ever seen a Zenith FTM (Flat-Tension Mask) set? That was a CRT with a truly flat screen. I don’t think they were very successful, though.
    1
  23. I never used one, but I read reviews which said that, after years of staring at convex CRT screens, the Zenith gave one the illusion of actually being concave. One benefit from being at least vertically flat (both the Sony Trinitrons and the Zenith FTM) was less reflection from overhead lights in an office.
    1
  24.  @bsadewitz  Even the fovea is a compromise: increased detail and colour vision (more cones) means less rods, which means less light sensitivity right in the most important part of our visual field. And then there’s the blind spot ...
    1
  25.  @bsadewitz  Saccades actually involve turning off your sight in the brain, so you don’t see everything jump around during the eye movement. Each saccade lasts about a quarter of a second, and there is typically one of these per second. You cannot see during a saccade, but you just don’t notice. So for a quarter of your entire waking life, you are blind without realizing it.
    1
  26.  @bsadewitz  “Not seeing” = “blind”.
    1
  27. 5:12 Those f-numbers are the denominator in a fraction of the lens focal length (which is what the “f” stands for). So higher denominators means the fraction is actually smaller: e.g. f/2.8 is less than f/1.4.
    1
  28. Is electricity not “physical”?
    1
  29. But “semantics” means “meaning”. So if you want to ignore the meaning, then why are you saying anything at all?
    1
  30. So what does your supposed “audience” classify electricity as, if not “physical”, then? Is it something “spiritual”, perhaps? I’m trying to think non-semantically here, as you suggest.
    1
  31. Thought: wouldn’t it be neat if you could get the “raw” RGB+infrared data from the scanner? Then you could apply a software-based equivalent of Digital ICE to the image on a PC, that you could interactively tweak by hand (e.g. apply only to certain areas) for the best results, rather than having the scanner do an automatic, not so smart, one-size-fits-all job.
    1
  32. 23:00 It’s not a Windows phone. Phones did not run Windows, they ran Windows Phone. So it’s a Windows Phone phone.
    1
  33. 13:03 This is what happens when you have a an OCD presenter catering to an OCD audience. It’s hell in there, I tell you ...
    1
  34. 15:09 There were some vendors that pushed the envelope even further, with 90-minute discs, at least. But the reliability fell off at that point, so things finally stabilized back at 80 minutes.
    1
  35. 1:16 Rust isn’t magnetic. This is actually Fe₃O₄, I believe.
    1
  36. Using something in its entirety can indeed be fair use: https://www.techdirt.com/articles/20090810/1913245833.shtml https://www.techdirt.com/articles/20120530/17333319132/myths-realities-about-fair-use.shtml
    1
  37. This is why we have JPEG2000 now. The wavelet compression degrades more gracefully than DCT in old JPEG: it goes fuzzy instead of blocky/ringing.
    1
  38. 0:51 Sound is pressure waves. It can be transmitted through any matter, not just air: e.g. underwater, or through rock. Or the taut string of a tin-can intercom.
    1
  39. But if you let them loose, where do they go?
    1
  40. You were talking about “loosing” them. If you didn’t mean “let them loose”, what did you mean?
    1
  41. 13:59 “Economies of scale to rear their ugly head”, boyo!
    1
  42. 11:19 The aftermarket CD player that I fitted in my previous car would not play discs that had been burned at faster than 8×.
    1
  43. I just thought of a drinking game, where you take a drink every time he says something snarky. ‌ Nobody would get through a single video. ‌ ‌ ‌ ‌ ‌ ‌‌‌ ‌ Without having to go to the toilet. ‌ (Why, what kind of drink did you think I meant?)
    1
  44. “Sample rate” ≠ “Bit rate”
    1
  45. Have you considered trying different voltages through the klaxon, just to see how the sound changes? That would presumably change the motor speed.
    1
  46. 4:19 Yeah! (Thumbs up for getting that point across.)
    1
  47. 2:44 The semiconductor crystal on its own doesn’t restrict the conduction of current in one direction, it’s the junction between the crystal and the conducting metal wire.
    1
  48. 1:48 s/Kotelkinov/Kotelnikov/
    1
  49. 1:45 Kind of like a radar for light?
    1
  50. 0:55 Lower tolerances, not higher. They are less tolerant of variations from the spec, not more.
    1