Recent content by abhiroop_k

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    Graduate Quaternion Derivative: Product Rule Explained

    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?
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    Graduate Quaternion Derivative: Product Rule Explained

    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...
    • abhiroop_k
    • Thread
    • Calculus Derivative Quaternion Quaternions
    • Replies: 7
    • Forum: Calculus
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    Can Standard Alligator Clips Affect EMG Signal Quality?

    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?
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    Can Standard Alligator Clips Affect EMG Signal Quality?

    Yes, I will be using button electrodes.
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    Can Standard Alligator Clips Affect EMG Signal Quality?

    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...
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    What is the best op-amp for EMG signals?

    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...
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    EMG vs ECG Electrodes: Can ECG be Used as a Substitute?

    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
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    Graduate Decent papers/articles on black holes

    thanks. :D i need a little more information about the theory of formation giants->black holes->lifetime
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    Graduate Decent papers/articles on black holes

    Any decent papers/articles on black holes, their formation, dynamics, etc? Moderate amount of maths and derivations involved would be great!
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    Undergrad Are Metamaterials the Key to Developing Cloaking Devices?

    Any decent links or papers about cloaking devices using negative refractive index metamaterials?
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    Graduate Working Principle of Split Ring Resonators

    What is the function of the splits on each ring in SRR's ?
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    Bumps on PET Bottles: Why & How?

    the pressure argument makes sense! :) i meant more contact area when a bottle tips over!
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    Bumps on PET Bottles: Why & How?

    ahh nice hadn't thought of that! :)
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    Bumps on PET Bottles: Why & How?

    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?
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    Bumps on PET Bottles: Why & How?

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