Recent content by iLIKEstuff

old post i know... but i think it's worth mentioning that there may have been a difference in convention especially given the age of the paper. complex refractive index is \tilde{n} = n + ik in one convention and in the other, it is the conjugate, \tilde{n} = n - ik last paragraph of the...

Thanks for the help. I managed to figure it out using eigenvalues to find the roots and also the fact that I know roughly what the root should be (since my function is completely arbitrary). Basically I fed in the Y values for both equations, then solved each one for X by finding the...

I'm trying to compare two fitted curves by looking at the difference in x. Standard regression analysis tools always give you a delta Y (residual) and this is how the fit is done in the first place. So I have the coefficients of each of the terms for my 7th-order polynomial. it's in the...

I'm trying to model the damped oscillation of a cantilevered beam for a project I'm doing. Really I want to know how "stable" this system is going to be given an initial displacement. My main problem is I'm not familiar with typical damping coefficients and material properties (or even how to...

Oh. Maybe I dont' understand your problem. What about quadratic bezier curve?

Oops. I had so many papers up I picked the wrong one to post... I meant to cite Zhengyou Zhang, "Parameter estimation techniques: a tutorial with application to conic fitting" Image and Vision Computing, Vol 15, No 1, 1997, pg 59-76. It talks about conic fitting. With those two papers...

This is kind of old topic but FYI check out a paper on this exact subject in IEEE by Fitzgibbon et al titled "Direct least squares fitting of ellipses" from 1999

http://nerdapproved.com/misc-gadgets/dolphin-laser-pointer-keychain/" So in the above image they have little attachments for laser pointers that can make different designs. I've played around with similar types of attachments for laser pointers and have never thought about the physics...

So I recently took a job in R&D right out of my Master's program (in electrical engineering). When I was interviewing at the company, I quickly realized that everyone was "Dr. so-and-so". I actually did not interview with a single person that did not have a PhD out of 8 people (except for the...

When discussing magnetism or magnetic systems, Do you apply an H-field? or apply a B-field? I suppose this is in the general situation where you apply a magnetic field to a material. In relation to B-H loop showing hysteresis, I notice that the "x-axis", typically dependent variable, is...

So I have a simple/easy to answer question for any physics buffs out there. I think I'm doing something fundamentally flawed. Can you take the inverse of a divergence? analagous to antiderivative-integral? e.g., I want to find J from the continuity equation with a known \rho(\vec{r},t)...

So I know this topic of tunneling has been discussed hundreds of times on this forum, but I simply cannot find nor deduce an answer to a burning question I have about what happens exactly INSIDE the barrier and how to describe it (preferably in layman's terms.) The problem is basic: A...

in relating the index of refraction to the relative permittivity (dielectric constant/function). it is known that n = \sqrt{\epsilon_r} for optical frequencies (i.e. \mu_r=1. now this website http://hyperphysics.phy-astr.gsu.edu/Hbase/tables/diel.html#c1 gives the relative permittivity of...

in using rayleigh scattering theory to calculate the polarizability of particles of arbitrary forms with sizes smaller than the wavelength, my text entitled "light scattering by small particles" by van de hulst states " {|\alpha|}^{2} is defined by {|\alpha|}^{2} = {l}^{2} {|\alpha_1|}^{2} +...

the link below should take you to a google book called "principles of nano-optics" by novotny and hecht. my question is on the dispersion curve plot they have on page 388/389 figure 12.5 and 12.6. it is describing the surface plasmon polaritons. the part i don't get is this excerpt which can...