Recent content by phrozenfearz

I don't think so... but please elaborate more on the method. In return, I'll elaborate more on what I have and what I need: I have several sets of [x] and [y] data series, taken by experiment, on separate occasions. The experimental setup, in terms of the two variables I need to fit a...

Hello PhysicsForums.com! I've got several sets of data that are all intended to represent the same ideal data set. I need to fit a regression to said sets of data - but have no idea of how to go about it. All multiple-regression literature I can find reads to the tune of: given...

Perturbation Theory Help! Hello physicsforums.com, The last two weeks of my nuclear engineering course covered a mathematical topic known as 'perturbation theory'. It was offered as a 'method to solve anything' with; the problem is, however, that nobody in my class understands it. Basic...

It's meant to represent the angle in which a neutron is travelling. Omega is made up of theta and phi and if represented as a vector has a length of one. I'm not sure about that last bit you mentioned, but I don't think flux is relevant since we're only talking about one neutron.

Can you help me to visualize this? It doesn't seem obvious to me, but integrals have never been a strong point once they move beyond x-y plots. The exact question reads: Integrate ∫ Ω dΩ. Hint: Ω = (iΩx + jΩy + kΩz)

Yeah, if the integrand were one, it would be simple. But the problem (as stated earlier, I posted this in the wrong forum) asks for the integrand to be Ω. Hence, my confusion. Is it just a dot-product, or am I doing something dreadfully wrong?

Ah, sorry.. let me figure out how to export it from MathType... \[ \int {\Omega d\Omega } = \int {(\Omega _x e_x + \Omega _y e_y + \Omega _z e_z )d\Omega } = \int_0^{2\pi } {d\varphi } \int_0^\pi {\sin \theta d\theta (\Omega _x e_x + \Omega _y e_y + \Omega _z e_z )} \] \[...

I have a solid angle being integrated over the surface area of a unit sphere. The only way I can interpret the answer I'm getting is that the integral of a vector w.r.t. a vector is equivalent to doing a dot-product. Therefore, the dot-product of omega with omega is zero. Thanks for the symbols!

I'm looking at integrating a solid angle multiplied by the vector representing that solid angle over an entire sphere (4pi). I've split the terms into sin(\theta)cos(\phi)i, sin(\theta)sin(\phi)j, cos(\theta)k, but I am still integrating phi over [0,2pi] and theta over [0,pi]. This doesn't seem...