Recent content by Conservation

This paper (https://www.ncbi.nlm.nih.gov/pubmed/15077763, sorry behind a paywall) seems to suggest that Fisher-Spearman permutation test is sensitive to differences in variances; however, I've also read other literature suggesting that this is not the case for permutation tests.

@Ygggdrasil Thank you; permutation test seems to be what I'm looking for. I'm probably going to use Two-Sample Fisher-Pitman Permutation Test implemented in R; however, I'm finding conflicting reports on whether permutation test assumes equality of variance when used as a test of different...

Hello everyone, Say you have two sample distributions that are known to be two different distributions (one randomly drawn from a Poisson distribution, other randomly drawn from an uniform distribution). Given that you know the distributions are not going to be normal, a two-sample t-test would...

My question stems form the section "How Many Modes in a Cavity?" in the following derivation of Rayleigh-Jean Law: http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/rayj.html#c2" In here, they count the number of modes as represented by volume of an eighth of a sphere. What's the mathematical...

Thank you for your replies everyone; I think, as pixel pointed out, I was thrown off by the notion that the effect would be dependent on the observer observing a phenomenon with his eyes, which would require light to reach. The example I was thinking of was indeed the common example of the...

Hello everyone, sorry if this is a noob question; I'm just starting out with special relativity. I was wondering whether relativity of simultaneity is a direct consequence of our ability to "know" being dependent on sight (light reaching a point). If, for example, we could only judge an event...

Homework Statement Solve ut+3ux=0, where -infinity < x < infinity, t>0, and u(x,0)=f(x).Homework Equations Fourier Transform where (U=fourier transform of u) Convolution Theorem The Attempt at a Solution I've used Fourier transform to get that Ut-3iwU=0 and that U=F(w)e3iwt. However, I'm...

Homework Statement Homework Equations Heat equation The Attempt at a Solution I can derive E(t) to get integral of du/dt over 0 to L, which is the same as integrating the right hand side of the original equation (d2u/dx2+sin(5t); while this allows me to take care of the d2u/dx2, I don't know...

Well, it was kind of a broad, open question about compounds with hydroxy group; I don't plan on using the compounds for anything, it's more for a puzzle of sort.

Fucitol made me laugh...Not quite what I expected. Anything else?

I'm looking for examples of some interesting compounds that contain alcohol functional group (please, no joke suggestions about various liquor). Bonus points for creativity/thinking-outside-the-box. Thanks.

I am currently studying nucleophilicity of molecules and am getting a set of conflicting information, so I wanted to clarify nucleophilicity trends with respect to solvent. The link below discusses how nucleophilicity increases down the periodic table with protic solvents and decreases down the...

Okay. That makes sense; That would make E field coming out from the opposite surface same as the E field going in, and that's consistent with Gauss's law. What I fail to see is how this distribution of induced charges will result a field of 0 inside the conductor. If there is an infinite...

I am trying to understand electric fields of conductors. Say that there is an infinite sheet of uniform positive charge; parallel to it lies a infinite, uncharged conducting sheet. What would the field look like between the sheets? Beyond the sheets? I would guess that the uniformly charged...

Ah, okay. Thank you very much.