Spontaneous parametric down-conversion Updated 2025-07-16
You can then detect one of the photons, and when you do you know that the other one is there as well and ready to be used. two photon interference experiment comes to mind, which is the basis of photonic quantum computer, where you need two photons to be produced at the exact same time to produce quantum entanglement.
Features Alan Migdall of the National Institute of Standards and Technology. Produced by the Joint Quantum Institute (JQI).
Mentions that this phenomena is useful to determine the efficiency of a single photon detector, as you have the second photon of the pair as a control.
Also briefly describes how the input energy and momentum must balance out the output energy and momentum of the two photons coming out (determined by the output frequency and angle).
Shows the crystal close up of the crystal branded "Cleveland Crystals Inc.". Mentions that only one in a billion photon gets scattered.
Also shows a photomultiplier tube.
Then shows their actual optical table setup, with two tunnels of adjustable angle to get photons with different properties.
Very short whiteboard video by Peter Mosley from the University of Bath, but it's worth it for newbs. Basically describes spontaneous parametric down-conversion.
One interesting thing he mentions is that you could get single photons by making your sunglasses thicker and thicker to reduce how many photons pass, but one big downside problem is that then you don't know when the photon is going to come through, that becomes essentially random, and then you can't use this technique if you need two photons at the same time, which is often the case, see also: two photon interference experiment.
Schwinger effect Updated 2025-07-16
SQLite benchmark Updated 2025-07-16
SQL prefix column names with the table they came from Updated 2025-07-16
Belt-driven bicycle Updated 2025-07-16
Concatenate two videos with ffmpeg Updated 2025-07-16
Culture of Brazil Updated 2025-07-16
Organization developing quantum control systems Updated 2025-07-16
Soviet Union Updated 2025-07-16
Ultraviolet catastrophe Updated 2025-07-16
What is the Ultraviolet Catastrophe? by Physics Explained (2020)
Source. Blockchain wiki Updated 2025-07-16
City in the Netherlands Updated 2025-07-16
Cladogram Updated 2025-07-16
TODO vs Phylogenetic tree? www.visiblebody.com/blog/phylogenetic-trees-cladograms-and-how-to-read-them:
Cladograms and phylogenetic trees are functionally very similar, but they show different things. Cladograms do not indicate time or the amount of difference between groups, whereas phylogenetic trees often indicate time spans between branching points.
Counties of the United Kingdom Updated 2025-07-16
There are few different versions. The most important as of 2020 are:
- historic counties of England: these are more fixed, but useless for politics
- administrative counties of England: these evolve with politics more
No one is capable of offering an official/more generalized (why can't Google Maps do this properly?) map than these people: wikishire.co.uk/map/#/centre=54.004,-4.500/zoom=7 So so be it.
Collegiate university Updated 2025-07-16
SubStation Alpha Updated 2025-07-16
strings (Binutils) Updated 2025-07-26
Science and Technology Facilities Council Updated 2025-07-16
AI game Updated 2025-07-16
Our Final Invention - Artificial General Intelligence by Sciencephile the AI (2023)
Source. AGI via simulation section.Ciro Santilli defines an "AI game" as:
a game that is used to train AI, in particular one that was designed with this use case in mind, and usually with the intent of achieving AGI, i.e. the game has to somehow represent a digital world with enough analogy to the real world so that the AGI algorithms developed there could also work on the real world
Most games played by AI historically so far as of 2020 have been AI for games designed for humans: Human game used for AI training.
Ciro Santilli took a stab at an AI game: Ciro's 2D reinforcement learning games, but he didn't sink too much/enough into that project.
Bibliography:
AI generated porn Updated 2025-07-16
This is going to be the most important application of generative AI. Especially if we ever achieve good text-to-video.
Image generators plus human ranking:
- pornpen.ai/ a bit too restrictive. Girl laying down. Girl sitting. Penis or no penis. But realtively good at it
- civitai.tv/. How to reach it: civitai.tv/tag/nun/2/
www.pornhub.com/view_video.php?viewkey=ph63c71351edece: Heavenly Bodies Part 1: Sister's Mary First Act. Pornhub title: "AI generated Hentai Story: Sexy Nun alternative World(Isekai) Stable Diffusion" Interesting concept, slide-narrated over visual novel. The question is how they managed to keep face consistency across images.
Unlisted articles are being shown, click here to show only listed articles.