Пікірлер

• 
  @edwardwilliammorris13403 сағат бұрын

  Excellent little gadget . Thanks for posting 👍👍

• 
  @robotblocks323222 сағат бұрын

  I have a quick question I see a bunch of math courses such as math 1171, 1152, 1150, 1173, 1100, 1170 and so on. Do they all use similar concepts of calculus? And what can calculus be used for?

• 
  @ChrisStaecker14 сағат бұрын

  These numbers are all different from different universities. At my university, we have 3 different calculus courses numbered 1121, 1145, and 1171. These are all similar, but with different emphases (applied vs theoretical). Other universities will use different numberings, and there is no way to know what the numbers represent without looking specifically at each university's description of their own courses. For "what can calculus be used for": it's a very general-purpose way of analyzing in a concrete way how a function is changing over time. This is extremely useful in just about every scientific or data-intensive field. All sciences, statistics, business analytics, etc. It's not something that a normal person uses in their everyday life (I never have), but the modern world could not exist without it.

• 
  @robotblocks32325 сағат бұрын

  @@ChrisStaecker if I were to let’s say choose a field related to computer/robotic engineering what would calculus be used for? I took pre calculus and did pretty well in it, but never fully understood what it was used for. All I did was a bunch of graphs and equations.

• 
  @ChrisStaecker5 сағат бұрын

  @@robotblocks3232 if your robots are moving, you’ll need to understand the physics of motion which involves calculus pretty fundamentally. If you’re dealing directly with electronics hardware, all the electrical engineering will be done using calculus. If you’re doing purely software engineering you may be able to get by without it, but really it depends on exactly what you’re doing.

• 
  @robotblocks32324 сағат бұрын

  @@ChrisStaecker Ok, thank you for the information! It helped clarify a few things I needed to know.

• 
  @1906FarnsworthКүн бұрын

  1:53 There was plenty of coaxial cable in the 1960's. It's how I received my TV back in those days, because we were too far from the stations to get it via antenna. Coax was used as far back as World War 2, and before.

• 
  @ChrisStaeckerКүн бұрын

  Yes coax is certainly very old, but this type of connector appeared in the 70s I believe.

• 
  @1906FarnsworthКүн бұрын

  @@ChrisStaecker Do you mean F connectors? Had 'em in the 60's. The ones with the integrated crimp rings might be newer than that, can't remember that much. The ones from the '60s had separate rings to crimp it on.

• 
  @ChrisStaeckerКүн бұрын

  @1906Farnsworth yes the F connectors, which Wikipedia assures me became common in the 70s. I’m no expert…

• 
  @davecgriffith2 күн бұрын

  New year's resolution: work "pop the doink" smoothly into a conversation.

• 
  @1ucasvb3 күн бұрын

  The math in the blackboard seems to mostly check out. They are expectation values for angular momentum operators in the total angular momentum basis, and there's also an integral for the spherical harmonics which is also relevant.

• 
  @ChrisStaecker3 күн бұрын

  I should've been more careful!

• 
  @diogoduarte40973 күн бұрын

  The bar is really low to get a "good" rating

• 
  @ChrisStaecker3 күн бұрын

  Yeah this one really isn’t that great, but I liked it so it gets the “good”!

• 
  @theobserver3144 күн бұрын

  A surprise, to be sure, but a welcomed one.

• 
  @TomCarlson4 күн бұрын

  One of these just sold on eBay for five bones! I woulda bid, but I already have one.

• 
  @zalibecquerel34634 күн бұрын

  Great to see you again! Hope you're doing well.

• 
  @N_Wheeler4 күн бұрын

  Still waiting on your 'Apollo 13' slide rule video.

• 
  @somecreeep4 күн бұрын

  3:08 What's wrong with the bra-ket notation from episode 3? That's the standard way of representing matrix elements of an operator. Not too many bars. I do think it's a cardinal sin to write J like a backwards L, but other than that, I don't see much wrong with it. Maybe they shouldn't have divided by J^2 since you can't divide by operators, but if they're just being lazy about some agreed-upon norm for operators (e.g. determinant or a Frobenius norm), that's fine too

• 
  @ChrisStaecker4 күн бұрын

  Ah- maybe it's OK? I don't actually know much about the bra-ket notation. I've only ever seen it like <f|x>. But now scrolling down deep on wikipedia I see there really is such a thing as <f|x|g>. I stand corrected! I was also initially thrown by the backwards L, but eventually decided it was supposed to be a J. I figured they copied it from somewhere, and maybe whoever was copying it thought it actually was a backwards L, so they wrote it like that.

• 
  @MattMcIrvin10 сағат бұрын

  @@ChrisStaecker Yeah, it looks to me like they got something out of a quantum mechanics text and at least used it as the basis of what they were writing.

• 
  @LeoStaley4 күн бұрын

  I love that there are 320 views and 19 comments, and that you called summer Glau a forehead actor.

• 
  @Salsmachev4 күн бұрын

  My favourite math props moment is in the second live action Scooby Doo movie. The movie itself is nothing special, but there's a scene where Velma uses a flight computer slide rule and I literally shouted at the screen when I saw it. I don't remember exactly what they were doing with it, but I'm pretty sure that's not the right slide rule to be using.

• 
  @ChrisStaecker3 күн бұрын

  Thanks- i'll check this out

• 
  @MattMcIrvin10 сағат бұрын

  Ever seen the shot of Spock using one of those on the starship Enterprise? He actually used it in multiple episodes if I recall correctly.

• 
  @caseymiradewitt4 күн бұрын

  Forehead actress is going to keep me smiling all day.

• 
  @ChrisStaecker4 күн бұрын

  DOES. NOT. QUIT.

• 
  @MichaelDoornbos4 күн бұрын

  I have an R.C.Allen adding machine but never thought of it as a potential movie prop. Neat!

• 
  @musicalBurr4 күн бұрын

  Funny coincidence. I just started rewatching this from the start only a couple of days ago. I do like it - for starters Summer Glau is a wonderful Terminator robot! There's some interesting time-travel logic that shows up later on in the 2nd season, like criss-crossing time branches or something. Too bad they didn't keep going into the third season.

• 
  @timetraveller66434 күн бұрын

  They go back further and build a time machine out of an abacus, a sundial , and some trig tables. click, click, click, whooosh !

• 
  @musicalBurr4 күн бұрын

  Haha! Funny. :-)

• 
  @jaapsch24 күн бұрын

  You mean, like the Dial of Destiny?

• 
  @8_Bit4 күн бұрын

  Fun! This is the first time KZread's recommended your videos to me since the L.A. Noire / The Prisoner videos.

• 
  @ChrisStaecker4 күн бұрын

  I guess they think you really love the props! I made lots of videos about the Curta last December, which totally burned me out- i'm just now getting back into it.

• 
  @MrEMeat-kk9tc4 күн бұрын

  Happy to see you making videos again!

• 
  @jaapsch24 күн бұрын

  I love it when props are made from repurposed other items. It happens more often with electronic toys than calculators, and usually in low budget films/series. Eg Firefly used a Master Merlin game as a controller

• 
  @Nashvillain10SE4 күн бұрын

  You mean like how OceanGate Expeditions repurposed a Logitech F710 Wireless PC Gamepad to take a submarine down to the bottom of the ocean floor to see the Titanic wreck?

• 
  @creamwobbly4 күн бұрын

  They also repurposed a fiberglass manufacturing process that was good for about half the depth they were planning to go to.

• 
  @StephenRansom474 күн бұрын

  [blank] Bashing is always fun in movie props … I keep thinking that Brazil & 12 Monkeys must have Oodles. 😅 *oodles - lots

• 
  @ChrisStaecker4 күн бұрын

  I have plans for Brazil- not sure about 12 Monkeys

• 
  @MattMcIrvin10 сағат бұрын

  The prop designs for Brazil must have been so much fun because they were going out of their way to make everything look as unpleasant and awkward as possible. The desk phone with a little patch-cable switchboard on the front of it and a ringer that does this horrible "bee-yurp... bee-yurp..."

• 
  @StephenRansom479 сағат бұрын

  @@MattMcIrvin Indeed … Terry is a master of World Building … it’s 🤔 Brazil-Punk!

• 
  @Gremriel4 күн бұрын

  Lol! I just saw another video of an old calculator, and I thought: I haven't seen Chris Staecker in a while. And here you are.

• 
  @ChrisStaecker4 күн бұрын

  I got real busy over the last few months but I'm hoping to make more videos again now-

• 
  @Laundry_Hamper4 күн бұрын

  The hordes demand mirth. Math mirth.

• 
  @willjohnston29596 күн бұрын

  From time 2:45 in the video, the computations he is doing are these: 17 + 15 = 32 32 + 23 = 55 55 + 87 = 142 142 + 91 = 233 233 + 45 = 278 278 + 67 = 345

• 
  @BlueArt-cu8xb8 күн бұрын

  Could you tell me about the information of textbooks? Thank you so much!

• 
  @willemmagney13279 күн бұрын

  Very clear description of the Isoperimetric quotient. Thanks :)

• 
  @nastazjapruszczak233611 күн бұрын

  I have finals in a week.this video is just so helpful and lovely. thanks a lot!

• 
  @guedemedebremartin508112 күн бұрын

  Thanks you Sir for this vidéo. Please Can I use texmacs that is much more easy for a New writer .

• 
  @ChrisStaecker12 күн бұрын

  I’m not familiar with Texmacs. Most math journals will expect your final article version to being in latex, so it could be a slight issue if you’re using something else. I understand that texmacs can export to latex though? In that case it would probably be fine.

• 
  @ChrisStaecker12 күн бұрын

  I’m not familiar with Texmacs. Most math journals will expect your final article version to being in latex, so it could be a slight issue if you’re using something else. I understand that texmacs can export to latex though? In that case it would probably be fine.

• 
  @guedemedebremartin508112 күн бұрын

  @@ChrisStaecker yes it exports in latex. But I wanted to know if it was good enough.

• 
  @ptmusicalboxes16 күн бұрын

  I think I understand this. It’s a device to sort out numbers. I think I figured out a division on it. It truly is interesting.

• 
  @ptmusicalboxes16 күн бұрын

  You can divide with these.

• 
  @CaribouDataScience17 күн бұрын

  According to my slide rule the answer is ...267,000

• 
  @AtelierDBurgoyne17 күн бұрын

  Your series is fun and full of good, sensible reflections. At 1:02:25 for the Curta during an expedition to Greenland, those not-so-smart marketing folks added an image of... a penguin from Antartica! There are no penguins in the Arctic. Doh!

• 
  @CaribouDataScience18 күн бұрын

  How would you like to have to use the 8 hours a day😮

• 
  @Tommy_Poole20 күн бұрын

  This was truly excellent and I learned so much. Thanks Professor Chris.

• 
  @BokBarber21 күн бұрын

  One of these days the youtube algorithm will give this channel the love it deserves. The hundreds of thousands, if not millions of views per video. And when that day finally comes Comptometer prices will hit the moon as thousands of people are influenced to rush out and buy them, and this man will cash out on both ends as he gets that sweet youtube money while liquidating his 8 storage sheds full of mechanical adding machines.

• 
  @LuisRodriguez-vh6fg23 күн бұрын

  I did that calculation on my Odhner 227. Very satisfying ❤

• 
  @donnamoreau899824 күн бұрын

  I have a brown one that has cents, dimes, dollars, ten dollars

• 
  @elcidleon650027 күн бұрын

  Do you know what happened to your webarea? It looks like it's dead.

• 
  @ChrisStaecker26 күн бұрын

  I just moved my office a couple of weeks ago and everything went down! I needed to update some links- should be working now!

• 
  @elcidleon650026 күн бұрын

  @@ChrisStaecker - Thanks for the notification. I assumed that something went wrong, and notify the situation.

• 
  @AtelierDBurgoyne27 күн бұрын

  Thanks for your great videos. Of all the old big adding, listing and calculating machines, I find the Dalton 10 key to be the most obscure. It had an early patent tjat included a typewriter keyboard, maybe for typing on invoices and calculating the total?

• 
  @BokBarber27 күн бұрын

  Well now I'm buying a Bates numbering machine. I've been looking for this exact thing but apparently my google-fu wasn't strong enough. Thanks Chris Staeker!

• 
  @BokBarber27 күн бұрын

  You could use it as a clicker by just clicking 10 and ignoring the 1s place.

• 
  @BokBarber28 күн бұрын

  Me: I would like 50 free paint sticks please. Home Depot employee: Sure, no problem sir. (Frantically presses the Napier's Bones Alarm under the counter.)

• 
  @KarenSDR28 күн бұрын

  How fascinating! I read the book "Yupana Inka - Decoding the Inka's Math. Tawa Pukllay® " by Dhavit Prem , which is based on the drawing from the 1500s by Guaman Poma de Ayala that you showed. I made a video summarizing and giving examples of the method in the book. But i've never seen anything like these before. I love how mysterious they are. The same kind of mystery that surrounds the ancient Chinese boardgame Liubo: there are hundreds of physical boards, but not much on how they were used (in 2019 a tomb hoard was found which apparently has many pages of explanations, but I haven't been able to find out more information than just the fact that it exists.) Also those mysterious Roman dodecahedrons. There are lots of theories, but no actual explanations from ancient sources. Thanks for making this video!

• 
  @AtelierDBurgoyneАй бұрын

  The machines either have a manual ribbon reverse control or they might have an auto-reverse mechanism as on vintage typewriters. Once the ribbon is wound on the other spool, the direction of travel of the ribbon would reverse, and this happens hundreds of times before the ribbon needs to be changed again. My 1912 Dalton adding machine is equipped with a ribbon reversing mechanism, so a Smith-Corona adding machine from the 1950s should have one too, just like on all the Smith-Corona typewriters of that era.

• 
  @hamdifouzai4713Ай бұрын

  you still have no crank ?

• 
  @ChrisStaeckerАй бұрын

  Never did get one- but I sold the machine a few years back anyway.

• 
  @melainekerfaou8418Ай бұрын

  I scrolled through all the comments thinking I'd find at least one or two proponents of Majority Judgement or other highest median voting systems, but apparently there isn't, so I feel compelled to fill the niche. With MJ you get to grade candidates instead of just ranking them. The system avoids Arrow's paradox (a minority third candidate can't cause the most popular candidate to lose to the runner up). And it provides rich statistics on voter preferences. A major drawback is the fact that it uses the median, not the mean: I don't think the media are cognitively ready for medians.

• 
  @phyllisbutler2275Ай бұрын

  This is amazing I didn’t know what it was my dad had this and gave it to us Wow mine works great I do need to sell it any ideas how and what I should do

• 
  @BartcountsАй бұрын

  It sounds strange, but no one has ever described how the tens transfer happens. Not just in addition (which is normal; that can be found in, say, the Swift or Addimat that can only add), but also in the other direction, in subtraction (and that is not normal for these simple devices). The device has no screws, so it is waiting for a collector to break open the glued housing.

• 
  @TheJeffersonАй бұрын

  "this little boink: lmao

• 
  @AtelierDBurgoyne17 күн бұрын

  Doink

• 
  @shroomyboiakabigboydru10ex85Ай бұрын

  I have that game same spyro

• 
  @roseblitz1439Ай бұрын

  I have a Bates Numbering Machine Serial No. D464641, 6 wheels and STYLE E. It was made in Hackettstown, NJ. I guess this was from Bates' second company. It is definitely stuck. It stamps but the numbers don't change. I thought it was funny that you used Bates from Downton Abbey. 😂