#] #] ********************* #] "$d_web"'My sports & clubs/Sabine Hossenfelder/0_Hossenfelder & other physicists notes.txt' # www.BillHowell.ca ??Jul2023 initial # view in text editor, using constant-width font (eg courier), tabWidth = 3 https://www.youtube.com/@SabineHossenfelder/videos #48************************************************48 #24************************24 # Table of Contents, generate with : # $ grep "^#]" "$d_web"'My sports & clubs/Sabine Hossenfelder/0_Hossenfelder & other physicists notes.txt' | sed "s/^#\]/ /" # #24************************24 # Setup, ToDos, #08********08 #] ??Jul2023 #08********08 #] ??Jul2023 #08********08 #] ??Jul2023 #08********08 #] ??Jul2023 #08********08 #] ??Jul2023 #08********08 #] 14Jul2023 Hossenfelder: Has Protein Folding Been Solved? Deep Mind AlphaFold 2020 90-% score #] compared to max 40% several years ago https://www.youtube.com/watch?v=yhJWAdZl-Ck Sabine Hossenfelder 937K subscribers Recently Deepmind made big headlines with its AlphaFold success. Did it really "solve" protein folding? What did actually happen? In this video I explain what the protein folding problem is, why it's important, and what the current situation is. The protein animation shown at 1 mins 13 seconds goes back to this publication: Structure of the Cdc48 segregase in the act of unfolding an authentic substrate. Cooney I, Han H, Stewart MG, Carson RH, Hansen DT, Iwasa JH, Price JC, Hill CP, Shen PS. Science, 365(6452): 502-505 (2019). https://doi.org/10.1126/science.aax0486 0:00 Intro 0:35 What's the problem? 1:49 Why does it matter? 5:07 How to try and solve it 6:27 The CASP Competition 8:10 Alphafold 2 9:07 What does this mean? 10:42 Sponsor Message #08********08 #] 17Apr2023 I believe chatbots understand part of what they say. Let me explain. https://www.youtube.com/watch?v=cP5zGh2fui0 11Mar2023 nothing on consciousness other than fashionable platitudes #08********08 #] 17Apr2023 Good Problems in the Foundations of Physics https://backreaction.blogspot.com/2019/01/good-problems-in-foundations-of-physics.html Sunday, January 13, 2019 Dark Matter Is an inconsistency between theory and experiment and therefore a good problem. (The issue with dark matter isn’t whether it’s a good problem or not, but to decide when to consider the problem solved.) Dark Energy There are different aspects of this problem, some of which are good problems others not. The question why the cosmological constant is small compared to (powers of) the Planck mass is not a good problem because there is nothing wrong with just choosing it to be a certain constant. The question why the cosmological constant is presently comparable to the density of dark matter is likewise a bad problem because it isn’t associated with any inconsistency. On the other hand, the absence of observable fluctuations around the vacuum energy (what Afshordi calls the “cosmological non-constant problem”) and the question why the zero-point energy gravitates in atoms but not in the vacuum (details here) are good problems. The Hierarchy Problem The hierarchy problem is the big difference between the strength of gravity and the other forces in the standard model. There is nothing contradictory about this, hence not a good problem. Grand Unification A lot of physicists would rather have one unified force in the standard model rather than three different ones. There is, however, nothing wrong with the three different forces. I am undecided as to whether the almost-prediction of the Weinberg-angle from breaking a large symmetry group does or does not require an explanation. Quantum Gravity Quantum gravity removes an inconsistency and hence a solution to a good problem. However, I must add that there may be other ways to resolve the problem besides quantizing gravity. Black Hole Information Loss A good problem in principle. Unfortunately, there are many different ways to fix the problem and no way to experimentally distinguish between them. So while it’s a good problem, I don’t consider it a promising research direction. Particle Masses It would be nice to have a way to derive the masses of the particles in the standard model from a theory with fewer parameters, but there is nothing wrong with these masses just being what they are. Thus, not a good problem. Quantum Field Theory There are various problems with quantum field theories where we lack a good understanding of how the theory works and that require a solution. The UV Landau pole in the standard model is one of them. It must be resolved somehow, but just exactly how is not clear. We also do not have a good understanding of the non-perturbative formulation of the theory and the infrared behavior turns out to be not as well understood as we thought only years ago (see eg here). The Measurement Problem The measurement problem in quantum mechanics is typically thought of as a problem of interpretation and then left to philosophers to discuss. I think that’s a mistake; it is an actual inconsistency. The inconsistency comes from the need to postulate the behavior of macroscopic objects when that behavior should instead follow from the theory of the constituents. The measurement postulate, hence, is inconsistent with reductionism. The Flatness Problem Is an argument from finetuning and not well-defined without a probability distribution. There is nothing wrong with the (initial value of) the curvature density just being what it is. Thus, not a good problem. The Monopole Problem That’s the question why we haven’t seen magnetic monopoles. It is quite plausibly solved by them not existing. Also not a good problem. Baryon Asymmetry and The Horizon Problem These are both finetuning problems that rely on the choice of an initial condition, which is considered to be likely. However, there is no way to quantify how likely the initial condition is, so the problem is not well-defined. The Strong CP Problem Is a naturalness problem, like the Hierarchy problem, and not a problem of inconsistency. There are further always a variety of anomalies where data disagrees with theory. Those can linger at low significance for a long time and it’s difficult to decide how seriously to take them. For those I can only give you the general advice that you listen to experimentalists (preferably some who are not working on the experiment in question) before you listen to theorists. Experimentalists often have an intuition for how seriously to take a result. That intuition, however, usually doesn’t make it into publications because it’s impossible to quantify. Measures of statistical significance don’t always tell the full story. Posted by Sabine Hossenfelder at 3:32 AM #08********08 #] 12Apr2023 emrep Sabine Hossenfelder (or team) 1-276-447-3276 http://www.BillHowell.ca/System_maintenance/cellphone, wireless/230412 reply to Sabine (USB file transfers dont work).txt I recommend that you don't waste too much time on my webSite: "internal" links on my site often don't work, while "external" links should be OK. I just can't find the time to switch my web management programs to bash scripts while I've been doing a 2-year change to all operator names (and much functionality) in the QNial language libraries that I built and normally use. I am a retired amateur, not a professional scientist. Physics : The one "significant, unfinished] bit of work I've shelved for ~3-4 years (significant means step-by-step rederivation of theories) is a look into Charles William Lucas's "Universal force" theory, as a replacement of [general relativity, quantum mechanics, [strong, weak] force, gravity]. I have [~150, ~250] sets of derivations on slightly different basis for Chapter 4 only (the easiest chapter). Here's one example : 'http://www.BillHowell.ca/ProjMajor/Lucas/documents/191025 17h43m math Howell.txt' HOWEVER, I won't work on this again until I finish revamping my libraries for the QNial language (another 6 months to a year?), AND until I find a suitable derivation-checker. Higher-order Logic (HOL), Isabelle etc are available, but seem not quite what I want. I have dabbled at building something muyself, but that may be beyond me? Any suggestions in terms of what you use might help. What I have followed that might be of interest, taking the "far side of fun physics" is : SAFIRE electrical model of the Sun - inspired by the "Electric Universe" theories, with some tie-in to Anthony Peratt's astronomical plasmas (I think he was a student of Hans Alfen). Many rules of physics, not to mention the Standard model f the Sun, are broken by experimental results (privately funded, [US, UK, Australian] scientists, Canadian [private funding, engineers]. Extends Kristian Birkeland's "Earth torella" geomagnetic experiments and concepts. See https://aureon.ca/ as they have videos of the experiments, plus post-experiment business descriptions, like "radio-deisotopification" (my invented term, as they didn't have suitable phrase for me based on MIT work). Edward Dowdye Hr, "Extinction shift principle" - I bought the book to look at details of his analysis that General Relativity FAILS to describe the bening of light from Mercury by the Sun. It only works at one altitude, and infinity (where it isn't doing anything). But his extinction shift pronciple explain "intertial mass" misconceptions wonderfully. Edward Dowdye 2001 “Discourses & mathematical illustrations pertaining to the Extinction Shift Principle under the electrodynamics of Galilean transformations” copyright 1992, printed by Ed Dowdye, Second edition 2001, ISBN 0-9634471-5-7 Steve Bryant - I mentioned this in a previous text message. Not that Dowdye and Bryant are black, which I feel uncomfortable saying in today's environment, but they are heros to me. Steven Bryant 2016 "Disruptive : rewriting the rules of physics" www.Infinite CirclePublishing.com, El Cerrito, CA ISBN 978-0-9962409-0-1 Randall Mills grat concepts and "Hydrino concept" (fractional quantum levels of electrons, Lucas has this too). He proposes to dump quantum mechanics, although he is still a GR believer. Fantastic experiments and theoretical developments, and fun. I wrote a partial review (my webSite only) of : Brett Holverstott 2016 "Randell Mills and the search for hydrino energy" KRP History publisher, 437pp, ISBN: 978-0-692-76005-5 www.BrettHolverstoot.com Edwin Kaal (Germany) - replacement for atomic theories of quantum mechanics. [Simple, powerful, intuitive]. I've just received a book he and colleagues wrote, but won't get to it for perhaps 6 months. I have gone through several papers. There are many more, of course. I can't say whether the above people are [right wrong, true, false], I'm not smart enough to judge. But their work is [inspiring, thoughtful, independent]. Neural networks My priority interest since 1988 is neural networks. Right now, I'm scrambling on reading Steven Grossberg (giant in NNs) "Conscious Mind, resonant brain" monster book, with a view to also checking if "Tranformer Neural Nets" (TrNNs) and their Large Language Modelss" (LLMs) like chatGPT, have architectures that may serve as [protero, incipient] capabilities that could be extended to Grossberg's lobng-standing theoories (he claims to have first implemented non-linear NNs in 1957-58 or 19L60s?), but even if that is a stretch, he has done enormous fundamental work, He even [describe, explain]s the split away from multi-disciplinary work in psychology and physics (eg Helmhotz, Maxwell, Mach), to the silos of today (mistake?). #08********08 #] 11Apr2023 Sabine Hossenfelder txtmsg 276-447-3276 Couldn't easily send by text, so I only sent a sentence or two. My response : ??? I'm not sure what the request about texting this number was about. There was one reply to my blog (below), but I can't see it or who sent it (I can replies to other bloggers). My blog regarding "I Think Faster Than Light Travel is Possible. Here's Why." : "... Steven Bryant's 2016 "Disruptive : rewriting the rules of physics" (an amateur scientist at the time) suggests why Special Relativity works as well as it does (but not as well as claimed), and mathematically describes the propagation of simple errors from MM origins through SR. ..." I've had problems with texting since 08Feb2023. I now have a new cellPhone & two providers on it, but not everything works yet. Bill Howell, Bill@BillHowell.ca Member of Hussar Lion's Club & Sundowners, (retired from volunteer FireFighters Jan2021) http://www.BillHowell.ca (browser shows root directory of webSite) http://www.BillHowell.ca/home.html (internal links are being revamped, most don't work) 1-403 361-0759 temporary (1-587-707-2027 in repair) P.O. Box 299, Hussar, Alberta, T0J1S0 (Note : when you go to my webSite link above, you should see a directory listing in your browser. Click on "0_README first.txt" for instructions to see my home webPage. If you stay in the browser directory listing, you can go [up, down, across] my entire webSite.) #08********08 #] 11Apr2023 Hossenfelder: I Think Faster Than Light Travel is Possible. Here's Why. https://www.youtube.com/watch?v=9-jIplX6Wjw Sabine Hossenfelder 833K subscribers 583,624 views Apr 8, 2023 #science #physics If you've been following my channel for a really long time, you might remember that some years ago I made a video about whether faster-than-light travel is possible. I was trying to explain why the arguments saying it's impossible are inconclusive and we shouldn't throw out the possibility too quickly, but I'm afraid I didn't make my case very well. This video is a second attempt. Hopefully this time it'll come across more clearly! >> Dummy Hossenfelder still thinks Michaelson-Morely experiment supports relativity theory >> Einstein's theory s compatible with v >> c, but how do you accelrate to it? 00:00 Intro 01:51 The Speed of Light as Limit 06:12 The Speed of Light as Barrier 12:44 Time Travel Paradoxes 20:47 Quantum Gravity and Summary 21:54 Learn Physics on Brilliant Try out my quantum mechanics course (and many others on math and science) on Brilliant using the link https://brilliant.org/sabine. You can get started for free, and the first 200 will get 20% off the annual premium subscription. 💌 Support us on Donatebox ➜ https://donorbox.org/swtg 👉 Transcript and References on Patreon ➜ https://www.patreon.com/Sabine 📩 Sign up for my weekly science newsletter. It's free! ➜ https://sabinehossenfelder.com/newsle... 🔗 Join this channel to get access to perks ➜ / @sabinehossenfelder 08********08 #] 11Apr2023 What is wrong with current physics: Lerner, Hossenfelder, Penrose, and more https://www.youtube.com/watch?v=lYN9GWS1xjM What is wrong with current physics | Eric Lerner, Sabine Hossenfelder, Roger Penrose, and more! The Institute of Art and Ideas 137K subscribers 136,675 views Mar 23, 2023 Sabine Hossenfelder, Bjørn Ekeberg, Roger Penrose, Donald Hoffman, Peter Woit, Becky Parker, Marika Taylor and Eric Weinstein 00:00 Introduction 00:37 Sabine Hossenfelder | Simplifying scientific explanations 04:45 Eric Lerner | The Big Bang theory contradicts JWST images 08:04 Donald Hoffman | Why Space-Time is doomed 10:29 Bjørn Ekeberg | Evidence against the Standard Model of Cosmology 14:03 Eric Weinstein | On the difference between a good physicist and a great one 17:06 Becky Parker | How physics should be taught 19:47 Peter Woit | The fundamental relationship between mathematics and physics theories 22:25 Marika Taylor | The problem with String Theory 24:25 Roger Penrose | Singularities and black holes 26:22 Sabine Hossenfelder | Science and religion aren't at war #TheoreticalPhysicsResearch #FutureOfTheStandardModel #CosmologicalModelOfTheUniverse Links to the debates and talks: Sabine Hossenfelder - Physics and the meaning of life https://iai.tv/iai-academy/courses/in... >> well done she spoke at [start, end] many religious ideas are orgin of theories of physics, still have ?value? we aren't allowed to ake a story more complicated why a theory? because it describes what we observe, it is a limitation Eric Lerner - Cosmology and the big bust https://iai.tv/video/cosmology-and-th... >> OK, experimental Donald Hoffman - The Key to Consciousness https://iai.tv/video/the-key-to-consc... >> further into special structures, space-time and reductionism (elemental particles) are doomed, need much deeper [concept, structure], evolution & perception - probability of zero Bjørn Ekeberg - Cosmology needs philosophy https://iai.tv/video/the-union-of-sci... >> philosopher? - career threat to challenge establishment more convenient to add to existing models (empirical positivism) Ekeberg feels this is wrong, we should be able to question things Eric Weinstein - Finding an ultimate theory of everything https://iai.tv/video/finding-an-ultim... Weinstein is a mathematical physicist renormalisation theory - how to ensure flaw doesn't affect all else (like Black-Scholes pricing) DNA helix - female not willing to guess, missed Nobel prize for not guessing.. Becky Parker - The theory to end all theories https://iai.tv/video/the-theory-to-en... >> teacher, mouth with no mind? but very [enthusiastic, energetic] different [view, thinking]s are needed, don't force students down a path? Peter Woit - The code to the cosmos https://iai.tv/video/the-code-to-the-... >> easy to understand macro, not micro, but math is easier quantum than to get emergent macro physical world and number theory: very different, but coming together? (to me - always has been like that...) Marika Taylor - The code to the cosmos >> overhyped physics in past, media likes "theory of everything" Roger Penrose - The future of cosmology with Roger Penrose https://iai.tv/video/the-future-of-co... singularities are robust predictions, eg horizon, singularities are in middle Oppenheimer & student - [collapsing, symmetrical, no pressure] dust cloud The Institute of Art and Ideas features videos and articles from cutting edge thinkers discussing the ideas that are shaping the world, from metaphysics to string theory, technology to democracy, aesthetics to genetics. Subscribe today! https://iai.tv/subscribe?utm_source=Y... For debates and talks: https://iai.tv For articles: https://iai.tv/articles For courses: https://iai.tv/iai-academy/courses # enddoc