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

  1.  @phillcameron8090  I was really surprised that they didn't stop Destin from moving the knife close to high precision parts. I would have expected wooden or plastic instruments only even nearby that part.
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  2. I agree 100%. The fact that he was so sure that the non-classified manual contained the info that he offered to fetch the manual was great. As was the fact that his supervisor waited for the actual manual and verified it. I do software for living and I do verify code written by others even though I trust them because people make mistakes every now and then. It's not about not trusting their knowledge, it's about assuming they are human.
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  3. The whole gaming experience was insanely well cut and Shane was definitely the star for the story. Only thing missing was difficulty setting with "Wife mode".
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  4.  @crowdrctrl  Yeah, however, you could probably be off by 2 just by the manufacturing tolerances of the blanks. Still, the computed speed was insanely close considering that he didn't have any real data on the flex of the ball.
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  5. Yes, it looks like his mind rapidly went "oops, glad I used safety goggles but if that thing would have caused any bigger fireball, I'd be missing some of my hair nonetheless".
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  6. 11:35 I would guess the fire is caused by the friction when the stitching undoes very fast. Edit: Yeah, the videos says this 10 seconds later :D
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  7. @Phillip Banes There are no Finnish car brands. The closest there ever was would be the Saab but that doesn't exist anymore.
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  8. @Phillip Banes Saab-Valmet Oy was founded in 1968 and it was a joint company owned partially by Finnish government via their ownership of Valmet. But I agree that Saab was mostly Swedish, which is why I used the expression the closest you can get.
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  9.  @yoloswaggins2161  60 is around the state where your heart could stop beating. The exact limit where your heart stops working is individual and 60 was considered the lowest value acceptable for this kind of test. Of course, if you get oxygen + CPR immediately after your heart stopped beating, you'll be fine, but you would definitely die unless other people bring you back in that situation.
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  10. The legislation should also be compatible with end-to-end encryption. For example, the UK law forces you to release all your encryption keys to police when requested. If you fail to give all the encryption keys, you go to jail. That's not obviously a free society. Another problem is that some countries have passed laws that make use of encryption illegal. That's another example of non-free country. Make sure that your country doesn't pass such idiotic laws that take away your freedom.
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  11. Is the actual interview off the web nowadays?
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  12. 17:30 Wow! If all ads were like that, I wouldn't skip ads anywhere.
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  13. I think the most genious part of the whole system was to mechanically adjust each water springler pressure spring to match the waterflow when both the incoming water pressure and the area under the arm is considered. And because you can add each springler setting to database, you know immediately how to adjust any spare parts needed when springlers fail in the future. One thing that I'd have wanted to see in this video is where does the water come from? With the amount of water that was pushed down the pipe, the pump and water source must be pretty beefy indeed.
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  14.  @cogoid  Did I understood correctly that the pump is running only ~2% of the whole year? Can a single pump be shared by multiple farms?
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  15.  @cogoid  Thanks for the clarification. Your previous comment didn't explain if the 150 kW water pump was electric or ICE powered but considering the power, I guessed ICE powered.
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  16.  @cogoid  That makes sense. Thanks!
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  17. That audible ad was really good!
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  18. 14:58 Youtube video compression: oh yeah guys, this is going to get blurry...
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  19. Superb video! And I totally agree that if they do not know the final count of required rockets, it's not going to happen in 2 years. Also, how come we now need 15+ rockets to get one mission to moon when over half a century ago one rocket was enough? Also, I think it would be much better demonstration of skill to send 15 missions to moon with 15 rockets than using 15 rockets to do one mission with cryogenic refueling on the orbit.
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  20. You should have measured/controlled RPM of the cutting head, too. Robert had really good suggestions about what to focus on.
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  21. Destin has tendency to shoot on location so when he doesn't follow the pattern, it's hard to notice :D
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  22. I thought JWST was supposed to be in the shadow of the Earth always (L2). Why is there still sunshine into the shield? Update: it was explained around 23:00. Basically L2 point would be in constant shadow of Earth but they want to use solar panels for electricity so they don't actually go exactly to L2 but instead orbit around it at a distance that gets sunlight to the solar panels.
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  23. In my experience, pretty thin twisted sharp sharp square line did nice cuts but the line was so fragile I had to be feeding more line all the time. Nowadays I'm using much thicker solid round line that is really durable and still results in usable cut.
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  24. The Triad seemed to have three very good guys in it. I guess it wasn't just a lucky accident that this was the submarine you got into. The Navy hopefully understands that this triad is special.
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  25. Great videoa as usual. I'm looking forward for the rest of the series! I hope you had included a link to the extended video in the video description.
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  26. The fact that the stripes were curved but now s-shaped tells me that the curtains are not slowing down in front of the image area. The spring is basically pushing more speed over the whole distance but the increase gets slower and slower when spring is losing energy and shutter blade is already moving pretty fast.
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  27. Does that "analog brain" of that carburetor get it to run within modern emission limits?
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  28. It turns out that ice being slippery is much more than friction melting or pressure melting. The article titled "Why Is Ice Slippery?" by Robert Rosenberg explains this is great detail. The actual cause turns out to be 10–100 nm thick water-like film on water-air surface. And this film like structure appears to form even on air-vacuum surface but then the film is even thinner.
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  29. 27:00 I understood that he had worried during the planning and as they think they have solved all known problems, there's nothing else to worry. Of course, the changes are that something unforeseen goes bad that worrying about that is not going to change anything so there's no point to worry anymore.
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  30. Why didn't you push the first domino with something attached to camera dolley? I'd have expected such a method be much more accurate than two different people controlling the camera dolley and pushing the first domino over.
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  31. 25:47 The performance by Shane was totally surpsing but the editing was perfect!
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  32. And they needs lots of experience. To stop on a spot from high speed, you have to have pretty good understanding of the sharpness of your blade, the condition of the ice (how smooth it is, how much snow on top) and the temperature of the ice. Then you just feel the pressure in your feet during the breaking. You start the breaking with knees bent and if you need more stopping power, you press faster towards to ground, if you need less stopping power, you release some pressure and turn the blade a bit towards the 90 degree orientation. If the ice is smooth enough, you can do the breaking movement with the blade nearly perfectly orthogonal to the ice and the breaking power is really low. The blade just skims the surface. However, your weight will go to the outside edge really easily if the ice is not perfectly smooth. When the speed is mostly slowed down (say about 5 km/h or less), you can basically hop on skates during the braking action to instantly stop by pushing the edges into the ice. That will stop the skates and the remaining energy must be transferred to your muscles and pushing you upwards (you still have knees bent, right?). However, if you estimate your speed incorrectly, your muscles are not strong enough to take the instant stop immediately or your knees are not bent enough, and your weight will go the outside edge and you'll fall. It's not dangerous but will look a bit embarrasing.
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  33. Here in Finland it's called "siimaleikkuri" which could be translated back to "fishing line cutter".
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  34. I used to think that there was a small hole for some of the light to leak away instead of partially transparent mirror.
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  35. 14:00 It looks like one or two extra gloves would have catched it. I didn't expect the ball to keep going straight for so long time.
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  36. Has search patterns changed now that we have better and better drones?
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  37. I think it would make more sense to play this video on the entertainment system instead of doing the usual safety routine.
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  38. It would have been cool to mention CCD sensors with the global shutter but other than that, great work!
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  39. I wish you had talked more about the bearing of this thing. That's the hardest part to understand for me. It appears to be some kind of slide bearing but what are the exact features?
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  40. It's pretty insane that this factory ever got built. Imagine the discussion before pulling the trigger to start building it: "So how complex system we exactly have to make here? To manufacture tiny roll of film???" Of course, in reality, all this is a product of long evolution where each part has been replaced with a slightly improved part or machine and we're seeing the end result of decades of optimization. And letting Destin to document all this on video is basically Kodak saying "Look, this is the setup you would need to replicate to build a new factory to manufacture film. And by the way, film industry is slowly dying away so don't expect to collect investment back in the long run."
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  41. Yes, it's actually the official term used to describe matter falling into black hole.
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  42. I hope you create similar video / video series about manufacturing mechanical locks or other stuff containing lots of small high precision parts built in huge quantities.
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  43. If you have sturdy enough tripod it's okay to touch the camera, you just cannot change anything on the optical path. If you have a tripod on the flimsier side of things, even a wind blowing towards the camera will affect the image quality.
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  44. I think they should play this video in airplane infotainment system before takeoff instead of doing the official routine.
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  45. 19:15 Mirror was like "wait... this pieces should be flying already!"
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  46. I guess that would need tilting motors for the whole platform to fix the gravity vs acceleration vectors to match the virtual movement even better.
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  47. This is probably the best made half an hour ad ever.
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  48. I assume that this question was part of the clipped away part but here it goes: Can they use external sound sources for passive sonar? Meaning, when they hear a ship with diesel engine, can they use the sound from the diesel engine to detect the enemy submarine nearby using passive sonar from the sound waves bouncing away from the enemy submarine? Also, considering that fighters now use AESA radars, can they do something similar with active or passive sonar today?
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  49. 32:50 Imagine that huge block of ice starting to slide towards you while you're half inside the hatch! Would you try to go down or jump up from the hatch?
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  50. Great video! I'm a bit surprised that they use just ball point tools instead of small rollers that rotate according to the direction of the tool. I would expect small rollers pushing from opposite sides of metal to allow for higher quality resulting surface. I guess that has some other con-sides that I cannot guess right now, probably related to how metal actually behaves under high pressure.
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  51. Great video! How did the colors look for the human eye at the bottom of the pool? The video shows greenish blue cast on everything but did you see colors like that yourself? I would have expected to see some kind of color calibration target at the bottom and video color corrected for that.
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  52. I think the most important thing is that you lose but you have understanding how to improve your performance. If the required effort to advance even a little bit in the game is too high, it will not be interesting to play. On the other hand, if the game is too easy and you can play through it without any effort, it will be boring, too. And if the player cannot understand how they can improve their performance, the apperance to the player will be "this game sucks". Some games, use adaptive difficulty setting and identical looking enemies get stronger if you've been playing without failures for a longer time. I remember playing GTA and getting a mission that was practically impossible to accomplish and after failing maybe 5 times in a row, the automatic difficulty setting nudged downwards and even the enemy count for the mission halved. Then it was too easy. So if you go with adaptive difficulty setting, it should have really smooth ramp instead of going directly from "way too hard" to "way too easy" or vice versa.
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  53. Okay, now do the same with Pierburg variable venturi carburetor such as one found in old Saab 900 engines. That thing is pretty nice because it doesn't need a choke to run run cold and since the venturi dimensions change according to throttle the fuel is mixed very well on all throttle levels. And there's no electronics or other external controls of any kind - it all works with vacuum from the carburetor. The genious part is having a oil dampener to allows the user to rapidly change the throttle position without the engine stalling because the venturi change speed is limited by the oil dampener. And you could tweak the dampening both by changing the amount of oil or the viscosity of oil in the dampener to tune it perfectly.
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  54. XO seemed to be pretty relaxed guy until your questions got closer to classified stuff. Then he went totally tight slipped.
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  55. There's actually zero change to get into orbital speeds with plastic potato gun.
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  56. If every CEO would be like Tory Bruno we would have a lot less problems with commercial companies.
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  57. 28:18 I think this is the most important thing to understand here: in case of complex metal structures it's already faster to manufacture and stress test the full part using this manufacturing method than do full 3D stress analysis on software on computer to figure out if the resulting part would be good enough for the designed purpose.
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  58. Same here. I was already aware of the paper trick and I always assumed it works because of slowing down the "projectile" during the fall but it appears to be just the surface tension after seeing the slow motion video.
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  59. It's indeed interesting how simple neurons are and yet we still don't have a clear explanation what's the brain's equivalent to the back propagation algorithm used for computer AI systems.
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  60. You get a similar feel with a DSLR with a broken LCD panel and 1 GB memory card. The important part of the film photography is not having a method to instantly check your results. That forces you to think more about what you're doing. Even if you have configured your DSLR to not show the preview automatically, you still know that you can immediately review the photo if needed. Taking photos of important moments without ability to know if the photo was successful and not being able to just shoot 100s of photos to make sure you have at least one successful shot makes all the difference. Also most film SLRs come with a really high quality lens (for its time!) which is usually much better than the kit lens most people shoot with their DSLR.
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