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  1. Confused
    Anchovyforestbane reacted to JeffreysTubes8 in Will our galaxy turn into a radioactive wasteland?   
    Possibly most of the star systems will be diluted for a time. Have you actually run a simulation? What will we do if we can't outrace expansion because we don't understand dark energy 😲
  2. Like
    Anchovyforestbane reacted to sluggo in Will our galaxy turn into a radioactive wasteland?   
    You used the important term 'trust'.
    The 'experts' in their field, trust the educational system that taught them, and believe they are passing on truth, as best they know it, at the present.A patient seeks a diagnosis from a doctor who is more knowledgeable and experienced than the patient. A person takes a flight to a distant place, trusting in the experience of the pilot, traffic controllers, maintenance people, etc. No one can do all things necessary in life, so they must depend on others.Unless a person is deceitful or dishonest, they will provide the best service they can.The one critical thing in evaluating trustworthiness is perspective.A plane crash with 100 lives lost, is a dramatic attention getting headline. That is the nature of news media. If they published every successful flight, after a few days, people would ignore those because it is common and boring. The important point is the crashes are a small portion of all flights. If you question information on a subject of interest, I suggest a little research on the subject will help you decide theory or fact (verified by experimental evidence).
    Some things like the weather are so complex, you won't get a definite forecast, but probabilities of this, that, and the other.
  3. Like
    Anchovyforestbane reacted to sluggo in Will our galaxy turn into a radioactive wasteland?   
    Most people who spend time and money in the pursuit of education want to believe they have acquired knowledge that helps them understand the world they inhabit. They trust in the scientific method to find answers to their questions. Their confidence is enough to publish information to others, and the public is expecting 'expert' opinions. Now imagine an aircraft crash scene. Investigators arrive to reconstruct the event.That is similar to the state of human knowledge. The world was already here when humans arrived. They must hypothesize or speculate with whatever evidence they can find as to how the universe came to be in its current state.
    No knowledge is certain, and subject to revision.
  4. Haha
    Anchovyforestbane reacted to HallsofIvy in Will our galaxy turn into a radioactive wasteland?   
    Because then no one would be impressed!
  5. Like
    Anchovyforestbane reacted to sluggo in Will our galaxy turn into a radioactive wasteland?   
    Same answer to your previous questions.
    'They' are speculating based on what little knowledge they have. 
     They are making it up as they go, revising their thinking as knowledge increases.
  6. Thanks
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    Yes. Gravity isn't a force, and Susskind says this around two or three times as well from his lecture. I've been saying it for years as well. You don't ever quantize fields,  that are not actually fields. It's a wrong turn amd has led us to a wrong path, as the Idea butcheres the first principles of relativity, that is. That gravity is and always will be a pseudoforce from the curvature and distortion of the metric from contribution of these stress energies that are known as contributed from the real particles of the standard model. If you want gravitons, you'd have to say GR is wrong, and doing that youll figuratively be cutting off the same foot to which we hold all our models on, in good faith.
  7. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    I can't and will not, because I'd be laboring under a lie. 
  8. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    This following lecture is really good for the select few who have spouted a lot of nonsense concerning gravitons (;-) we all know who I'm talking about) because the lecture goes into talking about the gravitational waves. When asked how it is generated, Susskind clearly is careful not to say anything about gravitons. He states it's an analogue of how charges move. I made a quick post before, about how you can envision curvature much like how an electron circles round a proton. It's because it has an acceleration, what Susskind didn't mention though as I had before, some quantum effects does away with certain classical ideas of this acceleration when wave functions dominate inside an atom. How quickly took it to larger systems, like pulsars and was very clear about it, the waves come out of the gravitational theory, not as mediator particle but based on rapidly rotating binary systems which produce these ripples in spacetime. I just finished watching it there. I hope others have done so too, because he really knows his stuff. Even when scientists speak about h as the perturbation of the metric g he's cautious not speak of them in the extreme field interpretations where we have been misled into the notion it is a physical field. Gravity is a pseudoforce and until we abandon the enthusiastic and frankly, audacious let alone ambitious attempts of making it part of a mediator field, I feel like we won't be making much progress.
  9. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    If you want a more complicated look into it, you can follow my essay, where the torsion is non vanishing in bivector gravity theory. You'll find out how to expand the equation 
    ∇·∇  = (∂ + Γ)(∂ + Γ)
    including how the gamma matrices (Pauli spin matrices) are involved as coefficients on the algebra. I don't expect everyone to be able to follow it as it a bit more difficult.
  10. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    Right heres the next lecture by Susskind,
    When I spoke about the relativitistic correction,
    ∇  = (∂ + Γ)
    It is also important to know how ot arises in general relativity for the Ricci curvature. It appears like
    R  = ∂ Γ + ΓΓ
    because it has those essential space derivatives associated to the gradient with how geometry, more specifically curvature spreads through space with dimensions of inverse length squared . Again, to get the full relationship, you can simply expand 
    (∂ + Γ)(∂ + Γ)
    with appropriate indices, and from it you find the parallel transport from ordinary concepts of curvature and the geodesics that matter couples to. From it you find the antisymmetric part involving torsion. Again. In bivector theory, this part arises even more naturally than what you might expect I'm GR. I think personally, bivector theory is more intuitive in this matter as it avoids unnecessary debates as to whether torsion should vanish as a symmetry of ordinary general relativity. When I imposed the gamma Pauli spin to it, we see it preserves with it the generally accepted laws of Poincare spacetime symmetries. In other words, anything preserving the Poincare symmetries, we should in principle expect it to be a real facet of nature.
  11. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    Now, I know some of you really are interested in this, including the person who private messaged me, and while it is a complicated subject, and though I've given a very short rudimentary way for you to envision using them, they can be used in many different ways, such as replacing the acceleration with a Christoffel symbol, but then you need to start introducing the summation indices and from that you'd get the four force of gravity. Though it's not a force, it's just a notation symmetry to the which we think about the wat the force drops off 1/length^2. If you want to know more, here's Susskind, he's pretty clear the way he does it. He has use of a white board and will glossary over the derivatives of space in terms of the Christoffel symbols when speaking about the curvature tensor.
  12. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    Ivy, you'll find out soon, but a short answer is the derivatives of spacetime. when we speak of the operator, there is a correction term in the form of the Christoffel symbol. It is the Covariant derivative, which is the 1/length correction to the space derivatives. If you just have some patience, I would have got to this.
  13. Like
    Anchovyforestbane reacted to VictorMedvil in Chtistoffel notation   
    I distracted Dubbel however he will get to it.
  14. Like
    Anchovyforestbane reacted to HallsofIvy in Chtistoffel notation   
    What does any of this have to do with the Christoffel Symbols?
  15. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    I'm being asked by another poster at this site about this notation, how are the symbols used, probably also how they appear on physics. So I have decided to make this public so that its not a wasted discussion and so others will learn as well. I'll start it all in segments in good time.
  16. Like
    Anchovyforestbane reacted to Dubbelosix in Chtistoffel notation   
    Ok, to understand the Christoffel symbol, I hope the notion of curved space and its unification with acceleration as the warping of gravity is also understood as a prerequisite because the aim of this post is not to teach the literal understandings of what you read in popular science books, but rather to break down what gravity is when it is manifestly spoke about in mathematical physics. 
    Ok... So hopefully you will already know about basics of Euclidean space ie. The coordinates of ordinary flat space as
    x + y + z
    Algebraically speaking, this can also be written as the powers of amy arbitrary notation 
    x and x^2 and x^3. This won't be important for our discussions though. What is important us that to have a four dimensional space, where time is a coordinate, you can write
    s^2 = x^2 + y^2 + z^2 - t^2
    Why is the last leg of this four dimensional Pythagorean taken away? It doesn't need to be, its a sign convention with notation (+,+,+,-), it can also be (-,-,-,+) it's only that the former is seen more often than the latter. The symbol "s" is the conventional notation describing a metric. By introducing the extra space dimension as a leg of the Pythagorean triangle, we have entered what us called Minkowski space.
    General relativity is not easier for newcomers to understand, but let's try and break it down, as simple as we can. In special relativity, the space which things can move in is described by an operator, called the Laplace operator and has the appearance of the derivatives with inverse length squared, and is a differential notation for the divergence 
    Or simply as
    In short it describes, acting on a function "f", we write it  as
    ∇2 f = ∂2f/ ∂x2  
    +  ∂2f/ ∂y2  +  ∂2f/ ∂z2  
    For three space dimensions, so what about the forth? While we are talking about a forth soon, we still have not degressed into the issue of curvature because operators can speak of a forth dimension and still not really talk about curvature, we'll get into that in good time. The next lesson will be about operators in four dimensions. I'll let this post be digested properly first.
  17. Like
    Anchovyforestbane reacted to Moontanman in How certain is our scientific knowledge? Honestly?   
    Scientific knowledge, while not absolute, is ever more accurate. Science is a self correcting process, no other method has yielded the results the scientific method has been able to provide.  
  18. Thanks
    Anchovyforestbane reacted to write4u in How certain is our scientific knowledge? Honestly?   
    It depends on the scientific discipline you are addressing.  Is there a country named Russia?
    The answer to that is "we know and can demonstrate that Russia exists" .  What it is like is completely subjective.
    It is like all large societies. It has the best of humanity, it has the worst of humanity.
    Those questions do not belong to the physical sciences, those are of the social sciences, which use entirely different criteria than the physical sciences.
  19. Like
    Anchovyforestbane reacted to Evolute in Torus Cell   
    Nice post with some good analytics. But with all due respect, Human chromosome fusion of the Ape's 2a and 2b centromeres notwithstanding, I have to stay with the Notch2NL genetic mutations found in Homo being the reason for Human brain size and cognitive functions. Rather than derail this thread I would refer you back to the Humans from Apes thread that you posted on a short time back. And since chromosome one is where the Notch2NL genes are located, the fusion of chromosome 2 wouldn't appear to be the culprit. There's more to this, of course but not for here would be better.
    More on topic here, though, there's no question that toroidal systems and mechanisms do exist in Humans and in Nature, but the OP was about cells that have toriodal shapes. Being essentially a doughnut-like, flatter shape more than spherical or ovoid. Good brain teaser 🙂
  20. Like
    Anchovyforestbane reacted to Evolute in Torus Cell   
    In truth, I am impressed with you understanding of component systems and their functions. And while I can produce some logical questions or observation, I am in no way at the level that you are at. My interest lies more in evolutionary DNA mutation in how the Human brain advanced so far beyond the Great Apes. To each their own. But I did find your torus cell concept intriguing and so there were some considerations that I thought I could pass on to expand on the idea, or at least modestly try to expand my own knowledge. You have succeeded in pretty much leaving me in the dust although, conceptually, I was initially able to follow your line of thinking. Fun stuff. I saw written somewhere that if one stops learning they die and I'm certainly not ready to throw in the towel just yet 🙂 
  21. Like
    Anchovyforestbane reacted to Evolute in Torus Cell   
    If the volume of two objects are equal, a sphere will have the least amount of surface area.
    Whether or not it would be beneficial to have a toroidal shape or not? Don't know. More surface in a torus for absorbing nutrients? Would a torus necessitate a nucleus that is consistent relative to the torus curve, so that it, too, would have to become a torus inside a torus? What might mitosis look like and where would chromosomes/nucleus be located? Would gravity select for orientation? Would small particles get stuck in the inner diameter? of a torus and shot off osmosis at cell surface contact points? And how would changing either of the two diameters of a torus affect any cytoplasmic homogeneity? Would traveling in a bloodstream by flipping end over end create issues within capillaries? Nature obviously spherical or elongated cells as being better so.
    Ball's in your court, Anchovyforestbane 🙂
  22. Like
    Anchovyforestbane reacted to VictorMedvil in Life Extending Retroviral Vector By Removing Kat7   
    Using the same method as the Chinese scientists that extended the life of mice(https://www.scienceforums.com/topic/37733-new-gene-therapy-reverses-aging-in-mice/) but slightly different, This being a Retroviral Vector that targets kat7 in liver cells using cas9 with a guide RNA to silence the gene as the inserts to the vector. This should in humans extending life span by 25% if it works anything like the mice that were gene edited.

    The Liver Targetting Retroviral Vector in this construct can be purchased from West Nanorobotics(https://www.wnanorobotics.com/shop) however the Insert will have to be purchased separately probably synthesized from cDNA.
  23. Like
    Anchovyforestbane reacted to CountryBoy in What does this mean?   
    It appears to be a plus sign, a minus sign, a times sign (as used in computer languages), and a percent sign, inside parentheses.  If you think it should have some deeper meaning than that, please tell us the context.
  24. Like
    Anchovyforestbane got a reaction from write4u in What are you listening to right now?   
  25. Thanks
    Anchovyforestbane got a reaction from write4u in What are you listening to right now?   
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