Recent content by sshzp4

lol. Which one of you is planning on becoming a professor?

dampers behave the same as springs when they are in series and parallel? Yes. Are such formulas useful? No! Always construct free body diagrams with well-defined inertial/non inertial reference frames. Look up 'mechanical impedance'. The standard MKC model is useful only because it leads...

Walk four miles a day to and from work, five days a week. Been doing that last three months now. Lost about 5+/-5 lbs. Don't eat a lot during the week, but (tend to) pig out at home during the weekends :"). Okay shape, need a month to start looking like a mathematician again. Can't stand...

PhD's, depending upon the city, get paid between 16-30K. 26-30K is for ColumbiaU, NY. 22K, MIT. 22K, CMU, Pittsburgh, 16/18/22K varies intradepartment for the mid west schools. And I have absolutely no clue about pays they lure grads at on the West coast. If you win an NSF GRFP/Hertz grant, you...

You need to understand elliptic integrals. Wolfram site and wikipedia entry on the elliptic have sufficient information for a solution and you can get some general elliptic manipulation strategies + history from http://everything2.com/title/elliptic+integral+standard+forms". To derive the...

1. Your questions were technically answered a long time ago, by people with good intentions. 2. You believe in the conspiracy theories, don't you? The know-it-all swagger is the same. 3. You are a social misfit, and not out of choice. You have a bad GPA. Your teachers think you are real crap...

Look up the help docs for ODE45/23/etc for a way to solve this in matlab. You will find all the examples convert the second order diff eq to two first order or even three. You already have what you need to pretty much copy and paste MATLAB example code and run your problem. This in control...

Lucid dreaming, anyone? Its ubercool. Exhausting, but fun. And there's never bad endings.

Gave up meat+fish for some weird reason when I was like 3. I simply refused. Obstinacy prevailed over parental tactics. Probably had something to do with all the animal/fable based cartoons+Discovery. Now I don't eat meat cause I have no taste for it. I used to want to be a zoologist. :/...

:D! What a visual there! What a genius! I prefer my computers. Thank you. Computers are tools. They allow you to store a part of your thoughts in a retrievable, visual form elsewhere while you go and think about some other pertinent issue. It is also the great democratizer. Some people are...

I am not sure if any texts helped me out completely. Most of this just comes from mathematical modeling experience. If you are really interested and have the time to devote, try understanding linear algebra (Gilbert Strang's MIT lectures videos on youtube+his or Jim Hefferson's text on the...

I don't understand your notation. You first homogenize your ODE, then you find the eigenvalues of your characteristic equation. Then you apply BCs to extract constants of integration. So you find eigenvalues before applying BCs. So, in general, yes. However, the way you have described your...

My answer would be to construct a step function for the y power term in x^y. The step function is a continuous representation of the integral of kronecker/dirac delta. The condition of the step is 'evenness' or 'oddness'. Eg. If your series were, 1 8 1 64 1 216.. then my solution would be...

Thanks Jack. That's how I chose to consider it as well. And it certainly is true when a, b and A, B are defined over the real domain. But if we examine the definition over a complex field, the transformation seems to stretch things a bit. But nevertheless, elliptics are usually defined...

My implication was, the question even arises because of a faulty method we use to observe behavior. We tend to 'look out' for things that we expect, and unconsciously not take note of counter observations. Eg. I probably look at the watch all time time. However, I take notes only when its 454...