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bkraz 53 minutes ago [-]
I'm always happy to see one of my videos on HN! I'm really glad to be getting back into the habit of making new videos. Let me know if you have any questions or suggestions. See you at Open Sauce!
hbarka 7 hours ago [-]
In my first internship, with a hard disk drive company, I learned how to use an Atomic Force Microscope to measure the roughness of the hard drive platter (the disk). The texture variation is in the order of angstroms or nanometers. It’s incredible how the AFM works like the needle of a record player, not via optics, and sensing at the atomic level.
0x0203 3 hours ago [-]
What's the size difference between the AFM needle and the area of stored magnetic flux on a hard drive platter? If you used an AFM as a sort of record player, scanning along lines of little pits, what sort of theoretical information density could be achieved over the whole surface of the disk?
cornstalks 58 minutes ago [-]
This is an advertisement, but it's one of the few I actually enjoy watching, and it suggests a track is "2500 times smaller than a human hair" which puts an upper bound on the size of a bit: https://www.youtube.com/watch?v=ZXs_9OXRnQo
This doesn't answer your question but your question made me think of this and I thought I'd share for anyone else.
MobiusHorizons 22 minutes ago [-]
If they are using the typical human hair = one thou, then the 2500 is suspiciously close to the conversion between inches and millimeters times a power of ten. I get 10 microns
ZiiS 5 hours ago [-]
Don't need to click the link to know who this will be.
Groxx 10 hours ago [-]
Applied Science is always worth an upvote
knob 6 hours ago [-]
I had never seen his channel and immediately loved it! Awesome stuff!
alhirzel 12 hours ago [-]
"I'll spare you the total sample prep details"...
Aboutplants 1 hours ago [-]
Honestly and hilariously, it’s a brilliant idea for his specific experiment. Met the exact specs of what he was looking for.
This doesn't answer your question but your question made me think of this and I thought I'd share for anyone else.