Technical Reports and Papers from my work. Message boards: Muon1 Project Forum Software here General/Rubbish Discuss things. Miscellaneous: Black hole images Obtained by tracing light through curved space, something I did during my relativity course at Oxford. |
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Browser Wars 4-in-a-row competition using your web browser Colunms Cubular matching! Tubetris Tubular Tetrominoes. NCGi website An incomplete Asteroids game? | ||||||
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2025-Feb-28 16:26:35 I like this tensor notation. #maths
https://en.wikipedia.org/wiki/Levi-Civita_symbol#/media/File:Epsilontensor.svg |
2025-Feb-28 15:47:32 More of Jupiter's polar region.
https://www.iflscience.com/gorgeous-new-views-of-jupiter-reveal-its-true-colors-65197 |
2025-Feb-28 15:46:46 True colour vs. false colour of #Jupiter (it still looks impressive in true colour). #space #astronomy
https://science.nasa.gov/resource/jupiter-in-true-and-false-color/ https://www.cnet.com/science/space/why-nasas-image-of-jupiters-true-colors-is-so-very-special/ |
2025-Feb-28 15:34:01 Vehicle dependability comparison (doesn't look good for my Audi).
https://www.jdpower.com/business/press-releases/2025-us-vehicle-dependability-study-vds |
2025-Feb-28 13:26:39 Flatellite: a flat #satellite fits more in a single launch. #space
https://www.rocketlabusa.com/updates/rocket-lab-announces-flatellite-a-new-satellite-designed-for-mass-manufacture-and-tailored-for-large-constellations/ https://x.com/RocketLab/status/1895310725863874826 |
2025-Feb-27 12:34:24 Firefly Aerospace lander nears the #Moon. #space
https://x.com/Firefly_Space/status/1894833374247698921 |
2025-Feb-25 22:28:30 Earth and Phobos together, seen from Mars. #space #astronomy #astroastronomy
RT https://mastodon.social/@setiinstitute/114065835479732263 |
2025-Feb-25 20:35:47 I had a three item order split into two deliveries. The delivery with two items had one go to the wrong building in the internal mail. 🙃 |
2025-Feb-25 20:26:17 I asked for a picture of a thousand mallards and it gives me 18 mallards, one of which has two beaks (another has two bodies, so maybe it's 19 mallards in all?) |
2025-Feb-25 20:24:47 I like this one. #mallards
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2025-Feb-25 20:21:21 Europa clipper flies past Mars, took about 4.5 months to get there.
#space #NASA https://www.nasa.gov/missions/europa-clipper/nasas-europa-clipper-uses-mars-to-go-the-distance/ |
2025-Feb-24 23:13:43 AI is eroding code quality states new in-depth report prepared by AI. |
2025-Feb-24 22:31:35 Two or more minor worries can cancel out if they have the correct relative phase. |
2025-Feb-24 18:20:47 Results of the Starship Flight 7 investigation.
#space #SpaceX https://www.spacex.com/updates/#flight-7-report |
2025-Feb-24 01:07:49 If the subsystem can predict the future exactly, it is not receiving any new information. |
2025-Feb-22 20:37:03 Aircraft accidents have been generally decreasing despite how it may appear.
https://www.bbc.com/news/articles/c5ym8n4lzp6o |
2025-Feb-22 19:47:59 But have you considered... a Canadian alternative? #computing
https://codeberg.org/Taffer/canadian-alternatives |
2025-Feb-22 00:27:36 Warning Alcohol Impairs Judgement
RT https://x.com/BobGolen/status/1893058021669966273 |
2025-Feb-21 21:13:19 Some Ukraine facts from ISW.
https://x.com/TheStudyofWar/status/1893022794402652341 |
2025-Feb-21 19:58:21 Picture taken from the X-37B in high Earth orbit. #space
RT https://x.com/SpaceForceDoD/status/1892960033513554202 |
2025-Feb-21 19:30:24 Horse rescued [video]
https://www.bbc.com/news/videos/cly4zg9n64po |
2025-Feb-21 19:23:45 UK government makes Apple remove end-to-end encryption for cloud storage. #IT #security
https://www.bbc.com/news/articles/cgj54eq4vejo |
2025-Feb-20 23:12:12 #Asteroid strike probability in 2032 has decreased.
#space #astronomy RT https://fosstodon.org/@AkaSci/114033051477613649 |
2025-Feb-20 18:48:19 Ice contours.
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2025-Feb-19 21:31:31 I let the equation solve with negative radii and thought "well it looks like an orbit, maybe that's just how the equation solves for the hyperbolic case", but only just realised negative radii also turn repulsive (1/r^2) forces into attractive ones and vice versa. |
2025-Feb-19 21:24:23 I'm actually starting to figure out what's going on with all these sign conventions. #physics
Incidentally, I tried Grok 3 on the hyperbolic Kepler orbits problem and it did exactly what I did: got the naive derivation OK but utterly confused about the sign conventions. |
2025-Feb-18 23:07:12 Atmosphere of an ultra-hot gas giant #planet found to contain layers including iron and titanium.
#space #astronomy https://www.eso.org/public/news/eso2504/ |
2025-Feb-18 19:27:33 If this launch goes to plan, it will be the first time a rocket lifts off in one country and lands in another.
#space #SpaceX https://www.spacex.com/launches/mission/?missionId=sl-10-12 |
2025-Feb-17 06:08:45 Database needs a clean.
RT https://x.com/elonmusk/status/1891350795452654076 |
2025-Feb-16 23:06:51 #AMD Zen 6 (Ryzen) #CPU architecture rumoured to have 12 cores per die. Some desktop parts will have 24 cores total.
https://www.techpowerup.com/332583/amd-zen-6-powers-medusa-point-mobile-and-olympic-ridge-desktop-processors |
2025-Feb-16 20:43:00 "The Trump administration [...] has reportedly struggled to reach the people that were fired after they were locked out of their federal email accounts."
https://www.bbc.com/news/articles/c4g3nrx1dq5o |
2025-Feb-16 20:22:02 The squirrels are eating the parrot food.
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2025-Feb-16 05:58:58 I noticed that most of the errors the AI is making in its code are because it can't anticipate the _behaviour_ of the program. The syntax is fine. Then I realised "oh yeah, that's the Turing halting problem". Undecidable. No AI or human will ever solve it in general. |
2025-Feb-15 19:15:54 Put PARROT food in the bird feeder, let's see what sorts of bird I get. |
2025-Feb-15 01:27:35 Car turned the check engine light _off_ this morning; never seen that before. |
2025-Feb-14 21:34:32 Don't need the online integrator any more when I can do this: #maths #computing #python
from sympy import * b,C,D = symbols('b C D') print(integrate(C/(1+(b*D)**2)*2*pi*b, b)) Output: pi*C*log(D**2*b**2 + 1)/D**2 |
2025-Feb-13 22:54:12 Decided to run something I'd been doing this week through Grok 2 step-by-step. It did the algebra correctly and generated working C code, which was embarrassing because when I tested it, the AI's code was correct and I'd made an algebra mistake! |
2025-Feb-13 04:47:37 https://www.politico.com/news/magazine/2025/02/11/democrats-tricked-strong-economy-00203464
#economics |
2025-Feb-13 01:58:20 Air-breathing ion engines for very low orbit satellites:
https://www.bbc.com/future/article/20250207-sky-skimmers-the-race-to-send-satellites-into-very-low-earth-orbits |
2025-Feb-12 19:52:30 Kanazawa, Japan in recent snow. [video]
RT https://x.com/cram_box/status/1888898391608013167 |
2025-Feb-12 19:29:31 I am now trained to put up barricades (caution or danger tape) at work, although the training title said "Barrricades" at one point. |
2025-Feb-12 15:19:57 Last night I dreamt that I was being chased around an abandoned shopping mall by a turtle carrying a smaller turtle in its mouth that had a smaller turtle in its mouth that was high enough to bite my finger. |
2025-Feb-12 02:58:14 Formula for the roots of a cubic polynomial --> "I'll never use that"
I actually used it for something sensible for the first time today. |
2025-Feb-12 01:08:39 Clouds on #Mars.
[timelapse] #space #astronomy https://www.nasa.gov/missions/mars-science-laboratory/nasas-curiosity-rover-captures-colorful-clouds-drifting-over-mars/ |
2025-Feb-11 01:21:53 The planetary "alignment" is quite good. I walked out (in the snow) to see the Moon, Mars, Jupiter near Aldebaran ("fake mars") and Venus about to set.
#space #astronomy |
2025-Feb-10 23:45:41 39m Extremely Large Telescope under construction. #astronomy
https://www.eso.org/public/images/potw2506a/ |
2025-Feb-10 03:24:56 In modern 3D games they put yellow paint to guide you, but I'm curious about the opposite: a relatively small game map that is designed to be as unintuitive as possible to navigate. |
2025-Feb-10 02:00:14 Baltic states unplug from Russia and join EU power grid
https://www.bbc.com/news/articles/crlkwyljl8lo |
2025-Feb-09 18:05:01 2.3% probability #asteroid impact arc for Dec 22, 2032. #space #astronomy
RT https://x.com/astroEdLu/status/1887939413054996494 |
2025-Feb-07 19:11:20 Walked past the radio telescope at work.
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2025-Feb-07 00:12:01 ESA Solar Orbiter may have found the origin of the solar wind. #space #astronomy
https://scitechdaily.com/solar-orbiter-just-solved-a-major-mystery-about-the-sun/ |
2025-Feb-06 22:50:09 Apparently, in my calculation, the orbits of mutually repelling particles with an inverse square law have negative eccentricity (hyperbolic orbits with e<-1). If I make them attractive, I get positive eccentricity again. |
2025-Feb-06 22:49:33 AI calculates the wrong amount of #cheese.
https://www.bbc.com/news/articles/cx2j15r1g09o |
2025-Feb-06 22:49:10 Nice video of a smaller boat and crew docking to a #SpaceX droneship with a booster on it.
RT https://x.com/JerryPikePhoto/status/1887308840271491088 |
2025-Feb-04 23:19:46 Concentric star-forming rings formed from galactic collision:
#space #astronomy https://hubblesite.org/contents/news-releases/2025/news-2025-006 |
2025-Feb-04 02:31:03 60kW laser fired from US destroyer [photo]
https://x.com/dustinemills24/status/1886531917186527687 |
2025-Feb-03 20:57:12 They took so many disused cables out of the underground laboratory! Also there is wi-fi down there now.
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2025-Feb-02 21:30:48 The groundhog says we get 6 more weeks of wintry weather.
https://www.bbc.com/news/videos/c78xeg59y83o |
2025-Feb-02 21:15:40 Could I use the reflections on the trombone bell to reconstruct the rest of the AI world?
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2025-Feb-01 19:59:11 Had a really funny dream where there was a + shaped tug-of-war with four people at the corners and the goal was to make the fifth person attached to the middle fall down a hole. Later on there was a less-unfair 2 v. 2 version (not sure where the person in the middle fit in). |
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