The Eternal Doorman

Who'd have thought that background radiation shows strong 'non-local' second-order correlations?! See  Inductiva - Chantal Roth on Fundamental Physical Models  and  The Action Lab - Branched Flow . Here's the photon sieve video: At 10:06 there's a kind of stop-motion effect achieved by changing the focal plane of the microscope, which then shows a different stage in the evolution of the image as the light moves away from the sieve. Here's his photon bunching ( Hanbury Brown and Twiss Effect ) video: This is a description of the process of making the sieve mask:  At 7:53 there's an interesting thing that happens when the etching isn't complete. And finally, here's a short course in photolithography: Subscribe to Huygens Optics .

 ... in two kinds of way, ... I was going to post a comment to the effect that the stock markets are basically all just one giant fraud, ... See  Michael Hudson Interviewed by Glenn Diesen . Subscribe to Steve Keen .  Then I listened to this, ... Now I think we desperately need a decent communications system! See Ian Clarke on Freenet . Subscribe to Innerverse with Jazz Maia .  YouTube didn't recommend this, I had to search for it, ...  48:03 The search worked! See  I Asked Google A Personal Question, ...  My comments : 58:22 I like hearing people talking about perfect circles. My favourite perfect circles are the ones which are curves where the perpendiculars to the tangents all intersect exactly one straight line. Other people may prefer other kinds of perfect circle, that's OK. I might be talking nonsense though.  1:04:20 Language as a physical causal structure?! How about perfect circles as a physical causal structure then? I think language...

This is really interesting. He has written a book  The Classical Wave Theory of Matter: A Dynamical Interpretation of Relativity, Quantum Mechanics and Gravity .    See his website:  https://classicalmatter.org/ . My comments : 17:28 It's not clear this is a conservative system though. What if this wheel, gummy-bear, whatever is not at the end of the string? If you hold the neighbouring wheels, gummy-bears, whatever, still and turn one on the middle then all that happens is you warm up the elastic band they're threaded on. So it is important that the neighbouring elements are free to move and that the elastic band is perfect. Then wouldn't you get half the twist going in one direction and the other half going in the other direction? [ 31:58 Ah OK] I think the more interesting model is that the 'photon' is a topological deformation in the perfectly elastic ether and is emitted by a spin 1/2 particle doing that Dirac belt trick thing, but that's not a material m...

I saw this film in 2014 sometime and I was very puzzled by the part in the opening scene where Hal Moore, played by Mel Gibson, is studying the specifications of the Bell "Huey" Helicopters . "Development of the Iroquois started in the early 1950s, a major impetus being a requirement issued by the United States Army for a new medical evacuation and utility helicopter." What struck me was the maximum ceiling of the things, which was well over 12,000 feet, fully loaded.  I wondered how many places there were in the world which had populations living at that height above sea level. I knew only Bolivia and India/Himalayas/Tibet. I can't find a clip of that scene, but there's this one: So I suppose that explains it. Subscribe to Hollywood Society Media . But then I just learned from CGTN that in the early 1950s the CIA were organising an insurgence in Tibet ( 3:26 ): Subscribe to CGTN .  

I said "Why is google so crap in Bolivia?" It replied:  Based on user experiences and reports, Google services (Search, Maps, Play Store) can feel suboptimal in Bolivia due to a combination of poor local infrastructure, limited local support, and regional technical restrictions. Key reasons for this include: Poor Internet Quality: Slow, unstable, and congested internet connections are common in Bolivia, which severely impacts the speed and reliability of Google Search. Lack of Local Data and Support: Bolivia has limited localized data for Maps and services, and the country is often not a priority for Google, leading to less accurate or missing information. Payment and Access Restrictions: Users in Bolivia often find that international cards are declined on the Google Play Store, requiring local payment methods. Technical Issues: Reports indicate that even when using decent, local Wi-Fi, services like the Play Store or updating offline packs for Maps can become stuck or unusab...

I have been complaining about some of the (presumably AI-generated) video clips he's been using, ( 4:20  and 7:26 ) showing what seem to be implausibly dense galactic clusters. So, ... last time I asked what they were, and where they were taken, and said maybe they were dark matter. Subscribe to Anton Petrov .

See coherence theorem on nlab . See also  Emily Riehl and Terrence Tau on The Future of Mathematics , Then maybe  Richard Clegg Explaining What's Wrong With Computer Science and  About Logic Interview with Graham Priest . There is in fact a long tradition of quite rigorous thought about proofs in the Category of Categories: see  doctrine on nLab . 

The rentiere economy . It's a really interesting take! You end up with most of the economic growth being interest paid by landlords on their mortgages. See his book  The Destiny of Civilization .  Subscribe to Glenn Diesen .  Subscribe to David Gilmour .  Joining the dots:  The Future is Closer than I Thought Modern Day Alchemy Peñico in Peru was constructed by a 5,000 year-old culture

Subscribe to Numberphile . Then I listened to this discussion about AI maths, where this Putnam problem came up: See the discussion at 16:55 Subscribe to  Weights and Biases .