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joigus last won the day on July 25

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About joigus

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  • Birthday 05/04/1965

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    Biology, Chemistry, Physics
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    Theoretical Physics
  • Biography
    I was born, then I started learning. I'm still learning.
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  1. Awesome book. Totally compliant with Einstein's alleged* motto 'as simple as possible, but not any simpler'. The Making of... might be worth checking out. *https://www.nature.com/articles/d41586-018-05004-4
  2. Hyperbolic functions. It's done in relativity all the time. Whistle if you need more help. Clues: Rescale x and y; then assign hyperbolic cosine (cosh) and sine (sinh). z goes along for the ride.
  3. He was. He didn't have the aura of genius that others have accrued perhaps, but nudged physics into common sense many times.
  4. https://www.washingtonpost.com/local/obituaries/steven-weinberg-nobel-winning-physicist-who-united-principal-forces-of-nature-dies-at-88/2021/07/26/75d8d24a-ee31-11eb-bf80-e3877d9c5f06_story.html Nobel-Prize-winning Steven Weinberg dies at 88. One of the makers of the standard model. His influence in the world of physics in the second half of the 20th century has been only comparable to that of giants as Feynman, Gell-Mann, and 't Hooft. His books Dreams of a Final Theory and The First Three Minutes are a must-read for anybody willing to understand physics and how physicists think.
  5. May be relevant to the discussion: http://www.olympedia.org/lists/55/manual https://www.insider.com/michael-phelps-weight-of-gold-olympians-suicide-depression-epidemic-2020-7 I'm not suggesting that these sources can be taken as particularly rigorous, or that any conclusions should be immediately drawn. Depression seems to be very common among elite sportspeople, whether successful in their careers or not. But upon first inspection, it doesn't seem that successful sportspeople are spared a lot of this alleged suffering. Gold medalist Jesús Rollán was a case very much d
  6. As you posted this question in the Quantum Theory section, I'm going to assume you're pitching it at consequences of the holographic principle for human experience. Unfortunately there are none that we can discern so far. It is too fundamental, and at the same time too poorly understood, for anybody to be able to draw any conclusions for consciousness or any other presumably emergent phenomena (big clusters of matter doing something collectively). 'The universe is a hologram' is a catchphrase for a deep physical principle that is in the process of being understood. There is no direct
  7. Exactly. One should always try to catch for patterns, not only in the facts, but also in human narratives, whatever the level of accuracy in reporting facts. I think some kind of crude facts generate this phenomenology, I have little doubt about that. But in the chain of narrative, something gets lost (or added), like in a complex, socially-driven, broken-telephone game. I think there's a lesson to be learnt in biblical (and other mythical) narratives that's very much related to what's happening here. Some Moses figure must have existed, but probably a very different guy from the one we i
  8. If one analyses UFO reports and close-contact stories, and from the purely story-telling POV, it all sounds very much as humans (bipedal, anthropomorphic) from the future doing the time-warp/FTL thing (or from a parallel dimension) and trying not to leave too much of a fingerprint (so as to avoid big ripples of retrocausal interference). These 'beings' are invariably portrayed in such a way that the number one feature that strikes me is how much they look like moderately-distant relatives that care about us. I wonder if the whole thing is not just a re-edition of the biblical stories
  9. Yes. Konrad Lorentz is one example. Another is Werner Heisenberg --also a Nazi. And I'm not crazy about Pauli either --physics is my background.
  10. For a particularly creative way of using our running skills, look up 'persistence hunting' and research thereof. Very interesting way of sophisticated thinking* making up for lack of speed. *Foreseeing the consequence of a chain of consecutive actions, rather than 1st-order causal thinking --the immediate consequence of an action. Corvids and psittaciformes!! I think @Peterkin's link partially overlaps with very interesting talk by author mentioned in mentioned link --John Marzluff: https://youtu.be/1Wp_R0Eo-NE?t=1183 (Ends at 38' 10''.) In
  11. It's clearly undergone circumcision.
  12. Although from the big bang you cannot infer gravity (meaning Einstein's field equations), there is a connection between both in the opposite logical direction. Singularities are a consequence of Einstein's field equations. This is the content of the Penrose-Hawking singularity theorem. Under a set of assumptions that amount to saying that causality holds (until you reach a horizon, that is), horizons themselves, and the singularities hidden behind them, are a must. Another way of saying it is that congruences of geodesics are not complete. So you could say singularities are a consequen
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