Recent content by robphy

possibly helpful (for an abstract-index notation approach): page 18 (and page 3 and onward for definitions) of "Conserved currents of massless fields of spin s>0" Stephen C. Anco, Juha Pohjanpelto https://arxiv.org/abs/math-ph/0202019 Proc.Roy.Soc.Lond. A459 (2003) 1215-1240...

(1991) Judas Priest - Painkiller [Best LIVE Version HQ] *RARE* 1991 (2026) JUDAS PRIEST ／ Painkiller ( cover ) 松島フェス-RockBarステージ- #松フェス - solo 2m10s - a different vantage point: (at 15m51s of a 52m video) 2026年6月28日RockBar- 松島フェス -【完全版】最初から最後まで (2012) Judas Priest - Painkiller -...

I can appreciate managing "cognitive load". It's overwhelming when it's too much.... too many signals, with a lot of background noise. Right now, it feels underwhelming.... too few signals in a vacuum. Under Browse by field, I'm glad the latest-updated thread is back. I wish there was a date...

possibly useful: Electric and Magnetic fields in terms of Weyl spinors Isak Fleig , Department of Physics, Lund University Bachelor thesis https://lup.lub.lu.se/student-papers/search/publication/9196838 See also Penrose & Rindler Ch 5.1 The electromagnetic field and its derivative operator...

One of the motivations for my "third column" suggestions above was that I feel like there is a lot of space where there could be more data. Many of the fonts are small and dim (as if I'm about to get an alert for low printer toner).

Insomnia https://en.wikipedia.org/wiki/Anthem_(band) (2010) INSOMNIA by Anthem - in studio: Anthem - Insomnia - https://tabs.ultimate-guitar.com/tab/anthem/insomnia-guitar-pro-1678238 - https://www.physicsforums.com/threads/talent-worthy-of-wider-recognition.1064653/post-7248226 (2021)...

Some suggestions (assuming full-screen on a WIndows desktop): I think Latest activity's width should be shared with Today's signal so that this is immediately visible without having to scroll down the page, when logged in. It seems when not logged in, Today's signal is already near the top. I...

This arxiv-document is based on Mermin's "Light Rectangles", where the area of causal-diamonds is proportional to the square-interval between opposite corners. It's unfortunate it makes numerous references to Euclidean geometry and uses circular-trigonometry to analyze the figures. [Mermin does...

Over the last 8 years or so, I've been seeking new young rock/metal guitarists (with the help of YouTube) from what would typically be considered surprising places [like my recent post in the covers thread: Nene Royal #2505 ]. I’m glad that some have gotten to go play here in the US and gain...

M 2.9 - 20 km ENE of Kenilworth, Illinois https://earthquake.usgs.gov/earthquakes/eventpage/us7000sz2h/executive 2026-07-08 19:38:43 (UTC) 42.186°N 87.503°W 5.0 km depth Earth scientist explains Lake Michigan earthquake near Chicago's north suburbs - CBS Chicago

Nene Royal (2026-July 7) 16-Year-Old Nene Royal Is Shy... Until She Starts Singing "Zombie" | Auditions | AGT (2024) Zombie - The Cranberries (Live Cover By Nene Royal feat. Headbanging Mike) (2020) Zombie - The Cranberries (Cover by Nene Royal 9 y/o) another from (2020) Zombie - The...

Maybe off topic... but I like the "Science by Humans" part Physics Forums - Science by Humans

Last Rites / Loved To Deth (1985) from https://en.wikipedia.org/wiki/Killing_Is_My_Business..._and_Business_Is_Good!#Songs https://en.wikipedia.org/wiki/Megadeth https://megadeth.fandom.com/wiki/Last_Rites_%E2%81%84_Loved_to_Deth_(song) (1984) Megadeth- Last Rites/Love To Deth (1987)...

=1050205&o=date']more Missioned Souls on PF

#1920 (In the Hall of the Mountain King) has a live-version from Blackmore's Rainbow. #1921 (Hall of the Mountain King - Savatage) has the Savatage version (inspired by Grieg) #1922 posted by @Hornbein has another cover: SRC. In the hall of the mountain king/Bolero.