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kogens

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China bans hidden car door handles over safety concerns

bbc.com
10 points·by kogens·5 tháng trước·2 comments

Infinity with Max Cooper – In Six Minutes

mk.bcgsc.ca
2 points·by kogens·2 năm trước·0 comments

1-Bit Pixels Encoded in E. Coli for the Display of Interactive Digital Media

docs.google.com
2 points·by kogens·3 năm trước·0 comments

comments

kogens
·năm ngoái·discuss
Still in use in many places for some ungodly reason.

At my previous job they had been using Notes since the company was founded in the early 90’s, meaning they lived through it being Lotus Notes, then IBM Notes and now HCL Notes.

Everything was deeply entrenched - email, warehouse inventory, ERP system, all documentation made in the entire company… just everything.

And this is for a scandinavian company manufacturing high tech devices for telecom and aviation, among other things.

It was… an interesting nightmare, constantly got in the way of any sort of productivity. Definitely contributed to me leaving early
kogens
·năm ngoái·discuss
And hidden https://news.ycombinator.com/hidden

(I literally just accidentally pressed hide on a post and was wondering how to un-hide it when I saw this post, nice coincidence!)
kogens
·2 năm trước·discuss
Yeah, I immediately thought of Kikuchi lines from electron diffraction in crystals https://en.wikipedia.org/wiki/Kikuchi_lines_(physics)
kogens
·2 năm trước·discuss
Very cool!

There are also techniques for the TEM (transmission electron microscope) to visualize and measure magnetic fields such as electron holography.

Esentially by splitting the electron beam in two, passing half through vacuum and half through a magnetic sample, then recombining the beams, you can extract magnetic information from the interference pattern of the two beams with some Fourier analysis magic.

I have a writeup with examples from a project i did years ago on my blog, if anyone is interested: https://longcreek.me/blog/2021/holography-intro

Walkthrough of calculations using Python: https://longcreek.me/blog/2021/holography-code
kogens
·2 năm trước·discuss
A project management tool/kanban board app. Similar to Trello, except Linear is way nicer to work with in my opinion.