How Flexible Machines Could Save Is Our Food Becoming Less Nutritious? 2 months ago   12:52

Veritasium
Compliant mechanisms have lots of advantages over traditional devices. SimpliSafe is awesome security. It's really effective, easy to use, and the price is great. Check out SimpliSafe here: https://simplisafe.com/veritasium

I visited the Compliant Mechanisms Research group at Brigham Young University and spoke to Professor Larry Howell:
https://www.compliantmechanisms.byu.edu

At the above link, you can download 3D-print files to make some of the objects in the video, plus learn more about compliant mechanisms.

What I learned about compliant mechanisms I summarize in the 8 P's of compliant mechanisms:

1. Part count (reduced by having flexible parts instead of springs, hinges)
2. Productions processes (many, new, different enabled by compliant designs)
3. Price (reduced by fewer parts and different production processes)
4. Precise Motion (no backlash, less wear, friction)
5. Performance (no outgassing, doesn't require lubricant)
6. Proportions (reduced through different production processes)
7. Portability (lightweight due to simpler, reduced part count designs)
8. Predictability (devices are reliable over a long period of time)

Special thanks to Patreon supporters:
Donal Botkin, James M Nicholson, Michael Krugman, Nathan Hansen, Ron Neal, Stan Presolski, Terrance Shepherd

Animation by Alan Chamberlain

Comments 2727 Comments

EpicEpidemic
#9 "Private"
Yawg moth
Woah, dude has greys in his beard now. Where has the time gone?
MIKHELOVIČ COOLLINAN
For 3D printing, what plastic would be best?
PLA is not very flexible I know
Jari Fuller
very cool...thx
Fharish Ahmed Clips
Most Cringe moment 7:56
Ricky Downhill - RDH
This is all very cool, but that microscopic stuff is nuts!!
M
Yea because we have not enough plastic on earth xD
Chris
These guys at 1:37
crazyassailant
At about 3:44, you ask the question about how long the switch piece lasts. He referenced fatigue testing which got over a million cycles before failure. Is there any kind of metric or estimation to what that equates to in terms of time in real-world use? How long would that be expected to last?
Jenn Hoff
Wow, this guy is amazing!!!
Kanishk Gang
The thumbnail is demonitized.
Teerin Varongchayakul
this is the coolest tech ever!
Dylan Dreisbach
Time to get my 3d printer set up again! They are quite cheap if you don't mind being on your own setting it up and troubleshooting and calibrating.
t guanni
So damn cool...
fernando jaimes
my reaction to this is just... :O WoW, awesome
Victor Sebastian S.
just just.. instant subscribe
Charterf 7
Ipad 11 bend
ufewl
just a realty bad video a waste of time, wont be subscribing
ufewl
What the fukc is going on at 6.07 we cant see what is going on or what she does so for someone who explains science it is fukcing uselss
Abdel Hakim
i can watch your videos all day long one of my favorite YouTubers
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Is Our Food Becoming Less Nutritious? How Flexible Machines Could Save 2 months ago   07:30

The nutrient content of food is declining. Is it because of soil depletion, selective breeding, or... something else?
Watch my new documentary, VITAMANIA: http://ve42.co/vita

I came across this story as I was making the film Vitamania. When you ask sellers of vitamins why you should take vitamin supplements even if you eat a healthy diet, they will say because our food doesn't contain all the nutrients it once did. This is supposedly due to soil depletion, cold storage, food ripening off the vine, and global transport of out-of-season foods. And to an extent this is true. Foods contain the greatest amount of nutrients if they are eaten soon after they are harvested. An unexpected source of nutrient decline is the increasing amount of carbon dioxide in the atmosphere. It causes plants to grow faster and bulk up on carbs but at the expense of other nutrients, so in percentage terms the amount of nutrients are actually declining. For now this decline is modest so supplementing with vitamin pills is probably unnecessary for most people with a healthy diet but it may be a concern in future.

Thanks to Kate Pappas & Chris Kamen for writing, producing and filming this video with me
Edited by Lucy McCallum
Sound mix by Wayne Hyett
Fact Checking by Calvin Lee and Claire Smith
Thanks to the Collingwood Children’s Farm and Glenn Fitzgerald from the University of Melbourne & Agriculture Victoria

Further Reading:

https://www.sciencedirect.com/science/article/pii/S0889157516302113
https://www.ncbi.nlm.nih.gov/pubmed/15637215/?ncbi_mmode=std
http://soils.wisc.edu/facstaff/barak/poster_gallery/minneapolis2000a/
https://www.politico.com/agenda/story/2017/09/13/food-nutrients-carbon-dioxide-000511
http://www.abc.net.au/news/2018-05-24/scientists-warning-rice-may-become-less-nutritious/9792822