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  1. R

    Does lifting weights stunt growth?

    I guess my point in chiming in on this is that is the issue: weight lifting taken to an extreme can stunt growth. It is the answer to the original question with some practical guidance as to what type of behavior constitutes "extreme". I'm out...RP
  2. R

    Does lifting weights stunt growth?

    Sure, but I think a kid that lifts as much weights as this one: http://www.kidzworld.com/article/5566-the-worlds-strongest-boy has probably crossed that line. I wonder if his parents have considered this, I kinda doubt it. I'll bet they're the type that will use ignorance as their...
  3. R

    Does lifting weights stunt growth?

    No doubt short stature helps in competitive gymnastics. But I was referring to studies done that show intense physical training starting before puberty and continuing after stunt growth. Here's one: http://linkinghub.elsevier.com/retrieve/pii/S0022347606801393 [Broken] There are many more.
  4. R

    Why do we need vitamin D?

    Great question. I agree that fat solubility must be part of the answer. Any vital nutrient that can be stored in fat improves survivability in cold environments, thus is "favored" by natural selection. But I think there must be a deeper aspect to. I'm thinking something unique about...
  5. R

    Does lifting weights stunt growth?

    True, but you might want to take a close look at gymnastics. A sport with a proven track record of stunting growth from heavy exercise/lifting starting from very early age.
  6. R

    Circuit design: electron reverse-diffusion

    Cool, sounds like an old timey science project. Since you're dealing with static charge, I don't see how a step-up transformer could be used. They require AC currents and are galvanically isolated so no physical charge could be transferred. My technique doesn't fit the bill either, it's best...
  7. R

    Circuit design: electron reverse-diffusion

    Hmm, interesting. What do you have in mind for this? I don't think any known material can do this b/c it's opposed to the laws of diffusion. But I know of a way to make this happen using active circuitry.
  8. R

    Auditory signals

    Your question pertains to the physiology of the cochlea. The cochlea is the organ in the brain responsible for transducing acoustic pressure waves into neural impulses. Each cochlea has about 3000 "inner" hair cells which produce impulses when excited. The inner hair cells are "tonotopically"...
  9. R

    Human eye pigmentation

    Keep in mind I'm not trying debate anything with you here. My interest in opening this discussion with you was to solicit your opinion on the physiology of green eyes. What I mean by this is whether or not you thought there was anything special about that color, as you do seem quite taken...
  10. R

    Human eye pigmentation

    Thanks for the reply. Since I asked for some of your time, I spent a little time looking online for the article I mentioned. No luck yet, but I did find some that I give below relevant to your points => Here's a link to a paper on Vit-D and retinal tumor suppresion...
  11. R

    Human eye pigmentation

    Oops, I forgot about that. I may not be able to find it, it's something I read about 2 years ago, it was a paper in a British physiology journal. That's all I remember, not much to go on. But either way I'm interested in your opinion about green eyes. This thread showed me that there is...
  12. R

    Human eye pigmentation

    I ask because I think it may have something to do with lightning flash photoprotection, in addition to to sunlight photoprotection. Remember, back in the evolutionary day it wasn't easy to find shelter from sudden storms.
  13. R

    Human eye pigmentation

    Monique, obviously you have an interest in green eyes. I'm curious, do you find the explanation given in this thread lacking? If so, do you have your own explanation?
  14. R

    Atom self capacitance

    Yes, the JE is all about the phenomena of electrons "tunneling" through a thin insulator sandwiched between 2 superconductors, so a junction is needed. The current is definitely "across/through" the insulator because DC currents can be produced as opposed to "in and out" as could be argued if...
  15. R

    Atom self capacitance

    I don't see the junction anywhere in your setup. The JE requires a junction. Of course an AC magnetic field would induce an AC current even in a superconducting loop. You didn't state what kind of magnetic field was used in your setup.
  16. R

    The Problem I Have with Evolution

    All excellent points. You really expressed the issue as objectively and honestly as I've seen it put, on this forum at least. To me, good science is about the search for things that can advance the state of knowledge. Even if the search turns out to prove something to the contrary, we all...
  17. R

    The Problem I Have with Evolution

    KAkermann, Agreed. But I've struggled to apply chance to the Russian fox experiment. Care to give it a go? I mean this sincerely. It probably is chance, but doesn't smell like it.
  18. R

    Atom self capacitance

    Nuby, I have to agree with V50. All of your calculations are really algebraic identities. This means there's no new information in them. The reason I tried to point you in the direction of the paper you found, is because it avoids this dilemma. It's "new" theory, and does not put the...
  19. R

    The Problem I Have with Evolution

    Your hypothesis is supported by the fox experiment. But the experiment isn't enough to prove it, it's necessary but not sufficient. The "high stress" in the fox experiment environment was the breeders favoritism towards the trait of tameness. Succeeding generations of foxes bred in the same...
  20. R

    The Problem I Have with Evolution

    Well, let's try to apply it to your question then. This experiment is one of the most relevant there is. I would say, based on this experiment, at a minimum: (a) The characteristics of a population of offspring are representative of the most favorable traits of the ancestor. and taking...
  21. R

    The Problem I Have with Evolution

    There is an interesting experiment on what I would call "unnatural selection", as it was controlled by man. Here's a link describing it: http://www.independent.co.uk/news/science/a-study-in-evolution-foxes-turned-into-mans-best-friend-482442.html The surprising thing is that merely...
  22. R

    Human eye pigmentation

    Quick reply, yes - it's located between blue and brown. I don't remember the specifics, it could also be due to a unique mixture of pigments. Humans produce more than one kind. See: http://en.wikipedia.org/wiki/Melanin#Melanin_in_humans
  23. R

    Human eye pigmentation

    Hi Monique, I did reply to your questions but looks like it got lost. I'm out of time at the moment. I'll try to get back to you again later on these.
  24. R

    Human eye pigmentation

    Terribly complicated question. But I will share an interesting anecdote. The father of an old friend, around 70 now, has pure white hair and ice blue eyes. But when my friend and I were younger he had brown hair and eyes, he was very proud of his Italian heritage. He wonders now why his...
  25. R

    Human eye pigmentation

    Great questions and a favorite topic of mine. Let me try to answer them. There was a great article in SciAm a year or 2 ago that described the structure of the eye. Basically it mostly consists of "nearly comatose" cells. The cells take this state because it makes them nearly transparent...
  26. R

    Atom self capacitance

    Listen folks, for the record, QM is king and for a lot of very good reasons, no argument there. My point to Nuby is merely that this seems to be a potentially useful alternative model of the hydrogen atom, and possibly even more complex atoms and polyatomic molecules. I mean there's still...
  27. R

    Atom self capacitance

    Nuby, I'd suggest you look for some more papers by same guy who wrote the first paper you found. If you find nothing, then you may have found an area open to some of your own creative theorizing. Maybe you could work something out and publish it? I really think this is a topic that deserves...
  28. R

    Atom self capacitance

    Yep, it usually comes down to semantics.
  29. R

    Atom self capacitance

    Not exactly. He is saying there are 2 kinds of energy present: kinetic (magnetic) and potential (electrostatic). One joule comes from the electrostatic field and 1 joule from the magnetic field - that's what I meant by "energy is additive". Equation 6 is saying that the electron's orbital...
  30. R

    Atom self capacitance

    So what? Energy is additive after all. His physical description of the de Broglie wavelength is brilliant and as far as I know a first. I look forward to seeing this model applied to other atoms. NO model is ever correct, as long as it offers unique insight and some novel predictions it...
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