Recombination (cosmology) Updated 2025-07-16
Type of processor Updated 2025-07-16
Universal asynchronous receiver-transmitter Updated 2025-07-16
A good project to see UARTs at work in all their beauty is to connect two Raspberry Pis via UART, and then:
- type in one and see characters appear in the other: scribles.net/setting-up-uart-serial-communication-between-raspberry-pis/
- send data via a script: raspberrypi.stackexchange.com/questions/29027/how-should-i-properly-communicate-2-raspberry-pi-via-uart
Part of the beauty of this is that you can just connect both boards directly manually with a few wire-to-wire connections with simple jump wire. Its simplicity is just quite refreshing. Sure, you could do something like that for any physical layer link presumably...
Remember that you can only have one GNU screen connected at a time or else they will mess each other up: unix.stackexchange.com/questions/93892/why-is-screen-is-terminating-without-root/367549#367549
On Ubuntu 22.04 you can screen without sudo by adding yourself to the
dialout
group with:sudo usermod -a -G dialout $USER
Universal quantum gates Updated 2025-07-16
Just like as for classic gates, we would like to be able to select quantum computer physical implementations that can represent one or a few gates that can be used to create any quantum circuit.
Unfortunately, in the case of quantum circuits this is obviously impossible, since the space of N x N unitary matrices is infinite and continuous.
Therefore, when we say that certain gates form a "set of universal quantum gates", we actually mean that "any unitary matrix can be approximated to arbitrary precision with enough of these gates".
Or if you like fancy Mathy words, you can say that the subgroup of the unitary group generated by our basic gate set is a dense subset of the unitary group.
Priory bicycles Updated 2025-07-16
Quantum algorithm by problem Updated 2025-07-16
Hebrew Bible division Updated 2025-07-16
Self-publishing website Updated 2025-07-16
Survivorship bias Updated 2025-07-16
University entry exam Updated 2025-07-16
They mean that until you are 18, you have to study a bunch of generic crap you hate just to get into university. Rather than studying whatever it is that you truly love to become a God at it as fast as possible and have any chance of advancing the field.
And then, if you decide that you want to change, which is not unlikely since you haven't really try to study what you signed up for before then, it can be very hard and time consuming, leading to a bunch of adults with useless degress they will never use at work.
Justin Helps Updated 2025-07-16
Creator of Primer
youtube.fandom.com/wiki/Primer gives real identity:Feels exactly the background you'd expect: disilusioned by the educational system, and working to make education better! Great guy! Reminds Ciro Santilli of himself a bit.
- the name is Justin Helps from Minnesota
- dropped out of his PhD that got boring, and used to work at Khan Academy
- LinkedIn gives PhD subject: www.linkedin.com/in/justin-helps/ as materials science
- twitter.com/helpsypoo personal Twitter account
Face reveal at: www.youtube.com/watch?v=QC91Bf8hQVo
Law of triviality Updated 2025-07-16
Personality Updated 2025-07-16
Projective special linear group Updated 2025-07-16
Proteomics Updated 2025-07-16
The study of the proteome.
Rear bicycle derailleur does not shift up Updated 2025-07-16
Full range achieved, going from fastest to slowest works (downshift), but going from slowest to next slowest (upshift) fails. Limits are good, B-tension screw didn't help
- bicycles.stackexchange.com/questions/66811/rear-derailleur-does-not-downshift-properly-shifts-up-smoothly likely good question but with wrong up vs down terminology
Spectre aperiodic monotile Updated 2025-07-16
Text-based music synthesizer Updated 2025-07-16
Upshift and downshift in cycling Updated 2025-07-16
How to blackout your window without drilling One year update Updated 2025-07-16
One problem popped up about one year after having bought the blinds in 2019: the blind won't stay still except at the most closed position. Anywhere above it started to slowly go up by itself.
There are unlisted articles, also show them or only show them.