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kogens

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China bans hidden car door handles over safety concerns

bbc.com
10 points·by kogens·قبل 5 أشهر·2 comments

Infinity with Max Cooper – In Six Minutes

mk.bcgsc.ca
2 points·by kogens·قبل سنتين·0 comments

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

docs.google.com
2 points·by kogens·قبل 3 سنوات·0 comments

The true power of regular expressions (2012)

npopov.com
27 points·by kogens·قبل 3 سنوات·3 comments

comments

kogens
·السنة الماضية·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
·السنة الماضية·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
·قبل سنتين·discuss
Yeah, I immediately thought of Kikuchi lines from electron diffraction in crystals https://en.wikipedia.org/wiki/Kikuchi_lines_(physics)
kogens
·قبل سنتين·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
·قبل سنتين·discuss
A project management tool/kanban board app. Similar to Trello, except Linear is way nicer to work with in my opinion.