Kyoto medal Updated 2025-07-16
Microwave source Updated 2025-07-16
Microwave only found applications into the 1940s and 1950s, much later than radio, because good enough sources were harder to develop.
One notable development was the cavity magnetron in 1940, which was the basis for the original radar systems of World War II.
Web portal Updated 2025-07-16
Yttrium barium copper oxide Updated 2025-07-16
Upside: superconducting above 92K, which is above the 77K of liquid nitrogen, and therefore much much cheaper to obtain and maintain than liquid helium.
Downside: it is brittle, so how do you make wires out of it? Still, can already be used in certain circuits, e.g. high temperature SQUID devices.
CIA 2010 covert communication websites Wayback Machine crawl date search Updated 2025-07-16
Computer science course of the University of Oxford variant Updated 2025-07-16
Euclidean algorithm Updated 2025-07-16
Mineral Updated 2025-07-16
Minkowski inner product matrix Updated 2025-07-16
Open X-Embodiment Updated 2025-07-16
Terrible name, but very interesting dataset:
GitHub describes the input quite well:
The model takes as input a RGB image from the robot workspace camera and a task string describing the task that the robot is supposed to perform.What task the model should perform is communicated to the model purely through the task string. The image communicates to the model the current state of the world, i.e. assuming the model runs at three hertz, every 333 milliseconds, we feed the latest RGB image from a robot workspace camera into the model to obtain the next action to take.
TODO: how is the scenario specified?
TODO: any simulation integration to it?
Original gangster Updated 2025-07-16
Try to fix your own bike before taking it to the shop Updated 2025-07-16
Sometimes you get annoyed to death with your bike not breaking or changing gears perfectly as you would like, and the people at the bike shop never do the job well enough.
The problem with bike shops is that the employees are already swamped with work, and they don't get paid any extra for doing more work.
As a result, paradoxically, they are often happier, and respect you more if you are trying to get them to help you to fix your own bike!
Also, for the same reason, they don't have the time to go for a quick test ride after a fix to ensure that the bug was actually fixed.
So they ignore things that would obviously be huge ridability benefits (although they might not be obvious to newbie customers), for which customers would gladly pay more money for.
But you start to learn how to do stuff yourself and it feel amazing when you finally get there (after infinite trial and error).
Ciro dreams of a bike shop that actually calls you for the appointment and then teaches you how to fix the thing.
Monstrous moonshine Updated 2025-07-16
Superconducting qubits are bad because it is harder to ensure that they are all the same Updated 2025-07-16
This is unlike atomic systems like trapped ion quantum computers, where each atom is necessarily exactly the same as the other.
Year 4 of the computer science course of the University of Oxford Updated 2025-07-16
Zeeman effect Updated 2025-07-16
Non-anomalous: number of splits matches predictions of the Schrödinger equation about the number of possible states with a given angular momentum. TODO does it make numerical predictions?
www.pas.rochester.edu/~blackman/ast104/zeeman-split.html contains the hello world that everyone should know: 2p splits into 3 energy levels, so you see 3 spectral lines from 1s to 2p rather than just one.
It also mentions that polarization effects become visible from this: each line is polarized in a different way. TODO more details as in an experiment to observe this.
Well explained at: Video "Quantum Mechanics 7a - Angular Momentum I by ViaScience (2013)".
Experimental physics - IV: 22 - Zeeman effect by Lehrportal Uni Gottingen (2020)
Source. This one is decent. Uses a cadmium lamp and an etalon on an optical table. They see a more or less clear 3-split in a circular interference pattern,
They filter out all but the transition of interest.
- youtu.be/ZmObNFAqkBE?t=165 passes the lines through a polarizer, which shows how orbital angular momentum is carried by photon polarization
- youtu.be/ZmObNFAqkBE?t=370 says they are looking at 1D2 to 1P1 changes.
Turing machine that halts if and only if the Goldbach conjecture is false Updated 2025-07-16
Zhuangzi Updated 2025-07-16
- James Legge (1891):
- ctext.org/zhuangzi side by side with Chinese, one chapter per page. Dividies it into three parts:
- Inner Chapters
- Outer Chapters
- Miscellaneous Chapters
- ctext.org/zhuangzi side by side with Chinese, one chapter per page. Dividies it into three parts:
Nature Scitable Updated 2025-07-16
As of 2022 visible at: www.nature.com/scitable
Apparently they had a separate URL as just scitable.com, so they were somewhat serious about it before shutting it down.
As of 2022 marked:RIP.
This page has been archived and is no longer updated
www.nature.com/scitable/blog/student-voices/ has last entry 2015, so presumably that's the shutdown year.
Self description:so quite related to OurBigBook.com.
Using our platform, you can customize your own eBooks for your students. Create an online classroom. Contribute and share content and connect with networks of colleagues.
OurBigBook.com Feature ideas Updated 2025-07-16
In this section we will gather some more advanced ideas besides the basic features described at how the website works.
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