Recent content by Xyius

Thanks for your reply! Yes, I figured as much. However I am having a hard time finding a good book to use. Perhaps I am not searching for the right key words. That is why I am asking for other who have learned about this formally for advice on where they learned it from. What I am looking...

Hello, I am a hobby machinist and also an EE PhD student. Recently I have been trying to make powerful solenoid actuators. I have succeeded, but they aren't perfect. I really want to make a professional, powerful solenoid. To give a sense of how deep I am going, here is what I have found so...

##n## is an integer. And I believe must be smaller than -2 from what I showed here. So that would mean the max value in the lower limit should be -4? Then I could just expand out until k=0 and use a geometric sum.

Homework Statement Find ##x[n] \ast h[n]## when ##x[n] = 3 u[2-n]## and ##h[n] = 4\left( \frac{1}{2} \right)^{n+2}u[n+4]## where ##u[n-k]## is the unit step function. Homework Equations None really The Attempt at a Solution So I know this is probably simple but I am confused. So the...

Yes, sorry I didn't state my current academic status as I wanted to keep the post short. I will have my PhD in electrical engineering in a year and also obtain a masters in physics at the same time.

Hello, I will try to keep it short here. I want to be a professor (Physics or Engineering) but from what I am reading, it seems like a large amount of work with little pay. I have a few questions about this topic and was wondering if anyone could shed some light on it. 1.) What are the...

Hello, I hope I am posting this in the correct forum topic. It really is more of a "mathy" type of question, but I am posting it here because it deals with radar, and this type of math is used a lot in radar. To the mods, feel free to move it to a more suitable location if desired. I have...

I made a typo in my original post, the one term at the end of the lagrangian should be ##mg y_0## not ##mg \dot{y_0}##. I figured it out! I was correct in my reasoning as you pointed out, but the trick was to realize that part of the integral of the third term can be written in the form ##-ml...

1.) The Problem Statement: a.) Find the Lagrangian of a pendulum where the height of the hinge is oscillating in the y direction and is is defined as a function ##y_0=f(t)## b.) Add a function (a gauge transformation) of the form ##\frac{d F(\theta,t)}{dt}## to the original lagrangian...

Ah that makes perfect sense! So now that the path in phase space is determined, how do I do the integration? I have attached a plot I made in MATLAB defining the loop the the particles motion defines in phase space. It would just be the center loop. My professor said I have to look at the...

I only really need help evaluating the contour integral. I added more detail for completeness. 1. Homework Statement A particle of mass ##m## is constrained to move on the ##x## axis subject to the following potential. V(x)=a \sec^2\left( \frac{x}{l} \right) Find the action angle variables...

Homework Statement An ideal transmission line is terminated with a load impedance of 90 ohms and has a characteristic impedance of 50 ohms. Why does it's S11 response trace out a circle on the smith chart? Homework Equations Z_{\text{in}}=Z_0\frac{Z_0+j Z_L \tan(\beta l)}{Z_L+j Z_0 \tan(\beta...

Oh! Of course! Thanks!

It's been a little bit since I have studied multi-particle quantum mechanics and I am a little rusty on the notation. Let's say I have a wave function, that consists of the tensor product of two spaces, one for each particle moving, ##|\psi_1,\psi_2>##. Each of these particles is moving in a...

EDIT: Oops! I posted this in the wrong section! Meant to post in engineering section! I am not sure if I am doing this problem correctly or not. It is very simple. 1. Homework Statement A 2 port network consists of just a series inductor with ##Z=j 100 \Omega## in a ##50 \Omega## system...