Proteus

Alright. I just thought there was something more to how those eddy currents were turned into sound.

Is a fourth DARPA Grand Challenge planned yet?

If an image is reflected by a surface which bends according to a particular function, can one, based on this function, know how the image is deformed, and reverse the deformation? How? (Formula etc.)

Why does a pot vibrate on an induction plate? (I know how an induction plate works, so skip that part.)

You're right, wrong formula. Sorry for the stupid question.

I had thought that the energy of a photon is entirely kinetic, since it has no rest mass. Is this true? At the edge of the Schwarzschild radius of a neutral non-rotating black hole, a photon can only just escape the black hole if it goes in the opposite direction of the black hole. If the kinetic energy equals the potential gravitational energy, then mc^2 = GMm/r <=> r =GM/c^2 Yet, this is HALF the actual distance to the black hole, since the Schwarzschild radius equals 2GM/c^2 . What's wrong?

How strong is the Lorentz force on nanoscale? Would the Lorentz force of an electrical circuit of only nanometers thick (such as carbon nanotubes) be powerful enough that arbitrarily nearby objects would be significantly magnetically influenced?

I read that in the desert, temperature inversion happens mostly on hot days. Why? The desert sand warms quickest, and so has the lowest heat capacity, so should absorb less heat than the air above it does. Why not? Sand normally has a specific heat capacity of 800 joules per kelvin per kilogram. Air normally has a specific heat capacity of 1000 joules per kelvin per kilogram.

Thank you! That was what I wanted to know. So some small animals with small brain volume yet are relatively intelligent compensate their low brain volume by decreasing the diameter of the neurons, not by increasing the mass density of the brain matter.

Do small animals have smaller neurons, or is there less space in between them? There doesn't seem to be a proportionality in the size of the skull and intelligence. Parrots are very intelligent, for instance.

I know how to remove it, but, well, it's a bit late now, since I removed it by accident. Just how long can it take before I get a rash? And is it possible, IF I AM infected, that I still don't get a rash at all? If it's certain the rash will appear if I'm infected, then there's nothing to worry about, since, with my foreknowledge, it would basically mean I'll have red alarm lights flickering everywhere as an indicator, ensuring that it won't go unnoticed to phase two or three, where the real problems like encephalopathies occur.

I'm not all that concerned, but one might as well be cautious. The tick was still very flat. I think I'm insensitive to the substance it normally secretes to numb the bite area, because I felt it when it bit.

I just accidentally removed a tick. I scratched it away when I felt something on my arm. Having removed it accidentally means that I did so carelessly. The needle was probably still in the skin. Not having tweezers, I tried to remove it with a knife, hopefully successfully, but if I hit the needle itself, this might only have made it worse. I'm pretty sure I got this tick today. Is it possible to have symptoms after one day of exposure?

What are the most important differences between the two?

Why doesn't it cause damage elsewhere in the body? Or does it just cause more damage to the bone marrow because there is a higher concentration of white blood cells (since they are produced there)? Er, thanks for the paper, but it's not like I'm going to write a thesis on it or something. I was just looking for some basic facts.

Pure red cell aplasia is said to be an autoimmune reaction. How can an autoimmune reaction cause the bone marrow to cease producing red blood cells?

How does multiple sclerosis lead to kidney failure?

Out of curiosity, is it theoretically possible to extract electrons from metals, perhaps through the administration of strong magnetic fields? If so, could this, hypothetically, be used as an energy source, or would whatever energy it would yield be equal to the energy it would cost? I do realize that it would be impossible to gain a net energy from the electromagnetic force of the electrons, since whatever energy that might produce would be exactly equal to the energy it would take to extract the electrons from the metal. Metals are, after all, generally electrically neutral. What I was wondering, however, was rather if it would be possible to use the kinetic energy of the electrons. I was thinking of metals because part of the electrons are in the conduction bands instead of in the valence bands; it's these that, in my hypothesis, I was thinking of extracting.

Ah, sorry, I didn't see the link last time I looked. Mokele, is the electrical activity of the muscles, or even of the peripheral nervous system, really that significant? You'd expect most of the magnetic field to be caused by the brain. Besides, if the magnetic field of the rest of the body was comparable, would magnetoencephalography even still be possible?

Blasted. I can't seem to find any relevant numbers, neither for the total number of axons in the body nor for the current per axon. Hasn't the magnetic field of the body ever been observed?

I can't seem to find this anywhere. I know that the nervous system produces a magnetic field, as it basically consists of electrical conductors. What I wonder is, how strong is this magnetic field in teslas?

Hm, I was thinking more of some kind of radiation which would penetrate through the barrier (not infrared), the emission of which would be correlated to heat. Suppose the source of heat is a complex chemical system such as a human body. This is all purely hypothetical. It doesn't need to be more than theoretically possible at present.

Is there theoretically any way to detect heat beyond a barrier, without access beyond this barrier?

So meta materials do exactly the same thing to sound waves as they do to light waves? Bizarre. What is the explanation for this? I understand why light waves do this, but sound waves are quite a different matter.

I read in this article that nine cats survived to temperatures as low as 12,5 through hypercapnia and hypoxia. I understand that this reduces oxidative stress, which can no longer be controlled by the body when it's chemical activity has been so far reduced, to an absolute minimum, but doesn't the body spontaneously break down through its entropy? Or is the entropy so reduced along with the temperature that it is no longer very significant? Aren't there reactions needed to keep the tissues from falling apart by themselves? I have the feeling I'm overlooking something. I'm not sure how long the cats survived at this temperature, though of course it can't have been very long.