Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Veritasium" channel.

  1. I hope the original study at least randomized the order of answer choices. I wouldn't be overly surprised to find out that the order of choices was more important than anything else. That said, I totally know how non-natural bayesian statistics is human beings.
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  2.  @williamherd7251  I agree, if you use all fans on constant power using a single big fan would be more effective. However, if you actually used the possibilities of having different wind patterns using different speeds for different fans, the design shown here is actually pretty clever. Plus it seems to use off-the-shelf parts so it will be much cheaper than fully custom setup using lots of fans.
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  3. I agree, Veritasium, Vsauce, SmarterEveryDay and Sabine Hossenfelder are prime examples of channels that make YouTube worth using even if you wouldn't like all the ads and random stuff.
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  4.  @KyleTheFolf  I would guess the decision makers (maybe called product owner?) has just prioritized other features that they focus on. Software development faces the problem that you have way more ideas about how to improve the product than you have actual resources to implement. As a result, you have to drop lots of great ideas and implement only the features you think are most important. That said, I still cannot figure out why they decided that doing the extra work to change behavior of dislike button was worth doing. Or why they removed the feature to allow community to offer subtitles to the channels.
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  5.  @Beanbean1313  I would recommend looking up what Wozniak did when Jobs refused to pay the original engineers bonuses. It's clear from the start that Wozniak wasn't in the game for money. And Jobs was all about money and secondarily about other stuff. And yes, Jobs was good at making money whenever Apple had a product good enough.
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  6. 10:25 I think one way to think about this is to take the Newtonian equation F = ma and simply observe that the acceleration ("a") is also defined by change in speed over time. And if time is warped by gravity, it obviously follows that F=ma is not that simple anymore.
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  7. ... and in addition, assume 10% change that any deceiving behavior is a misunderstanding.
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  8. The explanation and animation was great indeed! It made me immediately understand why applying it for the wave function obviously makes sense.
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  9. I have the bell enabled and still I got info about this video just today. Now is 20th day and this video was released in 16th.
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  10. 29:05 It's much easier to learn to tie the underlying crossing the other way and keep doing the loop the same way you always did. The simplest way to debug the issue (that is, identify incorrectly tied knot) is to notice that one of the loops points forward on your shoe and another points backwards. Correctly tied knot will always point the loops towards the sides under heavy tension (e.g. after walking for a while).
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  11. The results will be used nefariously by the commercial company. As you saw in the end, this researcher wasn't after money but pure knowledge.
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  12.  @harrybhalerao8315  Get-there-itis was strong in this story. If the plan was to use radio to locate the only landing option and there's any problem with your radios (such as never hearing any response to any voice communication) it's time to return instead of keep going.
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  13. 4:22 I think it would have been even more interesting to have a ratchet mechanism so that once you're supposed to make left turn, you no longer turn the steering towards right no matter which position it currently has. That would probably have prevented even continous turn to left because you cannot (easily?) balance the bike during the cornering anymore. Also, having a driver that can do something like Fabio Wibmer or Danny MacAskill would have been interesting. Though, those drivers could have just raised to front wheel of the ground in case the steering doesn't work anymore...
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  14. 22:10 Make no mistake: meaningful "relationship" can mean something else but a marriage and kids.
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  15.  @fullaccess2645  The problem with flag is that it will the influenced by the fan but you still cannot pass the flag though the fan to see the turbulence after the fan. A good demonstration would be using some kind of RC plane to draw horizontal smoke lines orthogonal to direction of the vehicle movement and the fan would then run through those smoke lines while another drone high enough (and maybe somewhat aside not to cause vertical air movement towards the smoke) would shoot the lines. If Derek's explanation is the correct one, this vehicle should be able to run through the smoke lines and the part of the smoke line that is hit by the vehicle will be delayed next to all the other areas. The only question is, will the smoke stay in visible clusters long enough when released into the wind?
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  16. This just underlines how bad methods our even best educational systems currently have.
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  17. Right, I actually wrote the same thing and then deleted the comment when Derek said it immediately after I had written the comment.
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  18. I guess the game of life simulating game of life is nicer demo because the actual rules that game of life executes are REALLY simple compared to minecraft. Imagine how complex the starting state of game of life would need to be to correctly simulate minecraft engine!
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  19. What does surprise me is not using ECC memory for any critical process. For avoiding problems in CPU or caches, you can just execute all logic twice in series and report error if second result does not match the first result. So the max to avoid this whole error class is 2x CPU load plus the price of ECC over regular RAM. Modern CPUs have multiple cores so you can (and should, to avoid unnoticed repeatable errors in CPU) run both the "original" and "verification" tasks in parallel so there's no extra latency needed.
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  20.  @freshrockpapa-e7799  I guess it depends on where you live. The difference between quality of education between countries is enormous.
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  21. If you were hurt with the church organ sounds, you're listening all audio with too high volume and you should reduce the overall listening volume if you want to preserve your hearing. I thought that the church organ sounds were actually mixed a bit quieter than they would appear in real world.
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  22. i just realized that you could actually make the thumbnails to stand out more simply by having a blue sidebar like in this video at 17:19. When most thumbnails at Youtube do not have single color siderbars, using one could make it seem different from everything else!
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  23. Also, the current education system accepts that children don't understand maths of previous years before attempting new stuff. Maths builds on previously learnt stuff so trying to skip stuff (you didn't learn this last year, try to cope without) is not going to work and will just make people hate maths. The minimum bar should be raised so high that all children understand all the things during the math classes but they may still make lots of mistakes while applying those concepts. However, no children should be left without support when they fail to understand some building block that they're expected to know next year.
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  24. Chernobyl doesn't look like shown in this video either nowadays because the New Safe Confinement structure was finally transported over it in 2016.
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  25. The actual disaster site was inside Shelter Structure (sarcophagus) which was visible in the background while measuring the radiation at Chernobyl area. Nowadays there's additional New Safe Confinement structure around the sarcophagus, too, to reduce radiation levels even more. The radiation inside the sarcophagus is still too high for humans to enter (nearly sure death due the radiation poisoning in a couple of days if you ever visited the inside for longer than 15 minutes). I recommend reading the Wikipedia page about the "Chernobyl Nuclear Power Plant sarcophagus" because that old structure was already huge and it had to be built in insane radiation environment. The situation at Fukushima was really bad, too, but the end results are not nearly as bad as at Chernobyl. The Fukushima site haven't needed any additional extra structures to reduce the radiation similar to sarcophagus at Chernobyl.
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  26.  @UristMcKerman  When did astronauts end up on ISS without ability get back to Earth? Redundancy doesn't guarantee original timeframes.
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  27.  @somethinglikethat2176  Sure, I think the NASA management was thinking that the shuttle has internal redundancy so much that you don't need a redundant shuttle (that is, another one for backup). NASA had a huge problem with internal communcations. At one point the engineering estimated that there was a one in thousand change for a catastrophic failure during a shuttle mission. And the management was thinking there was a one in million change for the same thing! If management was this far off from the reality (if these groups disagree on probablity, I'd assume engineering is closer to reality), it's not a surprise mistakes were made.
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  28. I think a simple fix could be that publishers would be held accountable for any research they publish. As a direct result, they would be forced to publish any replicate research that results in different results from previously published research. If publications do not want to do lots of replicate research publishing, they should improve their own quality checking (basically more elaborate peer review) before publishing.
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  29.  @error.418  If I undertood the story correctly, they had only the radio system to locate the actual place to land. Dead reckoning and celestial navigation were just good enough to get into distance where radio should work for sure. Of course, that assumes that the antennas are intact and the radio is working, neither of which did they check after departure.
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  30. And on such a scale, typical human life is between one and two minutes! Another way to understand scale of things is to use 1m x 1m x 1m cubes and represent a year with a small 1mm x 1mm x 1mm cube. If you take a typical human life and organize it in a row at the bottom corner, it would be a narrow line between 50–100 mm from a corner (about 2–4 inches if you don't know SI units). The time from all the stories in the Bible would two a couple of straight lines on the bottom, the time from the asteroid that killed all the asteroids would be 65 mm (~2.5") thick layer of small cubes at the bottom of a bigger cube. And the time when life first appeared on Earth would be about 4 full big cubes.
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  31. The interesting question is, what are your requirements? If you want an everlasting light bulb and don't mind the efficiency, it's really easy to do. However, if you want spectrum distribution identical to black body radiation (that is, quality wise matching an incasdescent light bulb) and efficiency above 100 lm/W (better than CFL), then creating everlasting light bulb is really really really hard. And those white LEDs? The failure point of those is either too thin phosphor coating (white LEDs use phosphor to convert UV light to visible light and that's a wear part) or electrolytic capacitors having limited lifespan inside the inverter needed to power those LEDs.
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  32. Knowledge and culture (e.g. music and art) is the only thing that remains from humans in long timeframes. If you don't do neither, your job is to provide support for those that do.
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  33.  @talosgak1236  Speak for yourself. I've learned a lot from many videos I watch. However, that requires active watching, not thinking about other things at the same time.
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  34. To be exact, the CIA method was shining something with a laser and measuring the reflection. It obviously works but it's an active method which means it can be detected. The method in this video is similar to passive sonar in submarines - it cannot be detected because the listener doesn't need to transmit anything. And just like passive sonar is much harder to create than active sonar, the problems are similar in this version, too.
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  35. Why walk on two feet if you can use three and automatically result in more stability on solid surfaces?
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  36.  @antonvlaskin8496  Yes, "site" is unclear. Some people use it as a synonym for being at the location, e.g. the closest parking lot. Obviously you cannot visit the actual reactor because that would be way too radioactive still.
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  37. Autorotation is more like using the rotor as wings with really poor connection to the plane body. It's closer to airplane with a broken engine.
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  38. Any device with an integrated battery that is not easily user replaceable is an example of planned obscolence. Manufacturers will keep telling lies about why they supposedly cannot create thin waterproof devices with 3.5 mm audio plug and user replaceable battery even though such devices have already existed in the past.
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  39. I think most people do not understand what "random" means in this context. Maybe ask for "Pick a number between 1 and 100 you think other people wouldn't pick" instead? There a truly random value would be the best option because you assume most people are not able to generate real random numbers at will. And the least "random" number would be "Pick a number between 1 and 100 you think most people will pick" – I'm pretty sure 7 would win that one in Western countries and 8 or 88 in Asia.
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  40.  @vishwajeetprasad1729  I'm happy to buy last years products from mindless people following this year's trends as long as I can fix the stuff that gets broken. Currently, even if you can solder stuff like Louis, there's no way to get software upgrades to an iPhone once Apple stops supporting it. With Android, there's e.g. LineageOS.
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  41. The interesting part about iPhones is that many people rationalize their high purchase price by the "fact" that Apple supports those devices longer than Android manufacturers. However, if you actually check the Apple documentation, they promise zero support for their products. In fact, they could never release a single software update nor any spare parts and they would still not break any promises they have made to the public.
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  42.  @williamzame3708  Challenger disaster was NASA management misunderstanding about the amount of redundancy in the system. The design used redundant o-rings (there were two o-rings and the design was calculated to be safe even if one failed). However, the cold temperature caused common fault mode which meant that the probability of failure of single o-ring was no longer independent and redudancy was lost because another o-ring would fail simultaneously with high probability.
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  43.  @Saigonas  The original Cosmos was scientific TV series hosted by Carl Sagan. The newer variant is a TV series hosted by Neil deGrasse Tyson. I think this episode was closer to the newer series.
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  44. Zac doesn't need to have extreme hobbies because his body will produce all the adrenaline he can ever need during normal business hours.
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  45. Great video! This is easily the most clear explanation of FFT and it also explains the history of it. And it again makes one wonder just how awesome mathematician Gauss was!
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  46. Superb episode!
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  47. "Nothing to hide; nothing to fear" is another way to say "I don't understand what you guys are talking about but I guess it cannot be anything important."
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  48. The example with coins was great but it made you think that to go around the other circle, you must rotate double the "expected" amount instead of "expected" + 1.
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  49. I like to say that I'm expecting time after death to feel exactly similar as the time from the start of the universe until my birth.
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  50. Yes, this wouldn't work for plane because that cannot use the friction between the vehicle and the ground.
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