Recent content by abhiroop_k

Thanks! Could you please elaborate a little more w.r.t the example I mentioned? I read a few articles and have come up with the following result for the equation i posed: d [f(q)] / dq = [-(a x q)/2] + [q* x a] Is this right?

How does the quaternion derivative work in the presence of a quaternion product. More specifically, does the standard product rule apply for quaternion derivatives? Say, I have a function f(q) = q* x a x q [where q -> quaternion, a -> const vector x-> quat prod] what is the result of the...

Okay, a basic doubt but, I have individual button cables that have a main and a shield lead. I need to use 3 of these electrode cables together, so do I connect all their shield leads' to a common ground?

Yes, I will be using button electrodes.

I need to collect data via measuring EMG signals in the upper arm. I have standard AgCl stick-on ECG electrodes. My question is, if I can use normal alligator clip cables for collecting this signal from the electrode and feed it into an instru-amp? Will this affect the signal strength and/or...

I am working on a project that involves using an op-amp (among other ic's) to collect EMG signals from arm muscles. I couldn't get my hands on TL072. Will IC 741 be a decent substitute? TL072 -> http://www.ti.com/product/tl072 IC 741 -> http://www.ti.com/lit/ds/symlink/lm741.pdf...

I need to use EMG electrodes for an upper-limb EMG interfacing project. I have been unable to obtain EMG electrodes. Can ECG electrodes be used instead? If yes, what are the repercussions? Thanks :D

thanks. :D i need a little more information about the theory of formation giants->black holes->lifetime

Any decent papers/articles on black holes, their formation, dynamics, etc? Moderate amount of maths and derivations involved would be great!

Any decent links or papers about cloaking devices using negative refractive index metamaterials?

What is the function of the splits on each ring in SRR's ?

the pressure argument makes sense! :) i meant more contact area when a bottle tips over!

ahh nice hadn't thought of that! :)

thanks. :) how are multiple curved surfaces more suitable for balance as compared to a single flat one? is it because they account for a larger contact surface area?

i meant any plastic (other than glass) bottle generally used for storing cold-drinks, water etc. :)