Recent content by FiberOptix

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    Projected Separation and 3D Distance Problem (Code Included)

    Right, this discussion has been helpful. I guess my initial assertion was incorrect and I can continue on but I'm still feeling a bit uneasy about it.
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    Projected Separation and 3D Distance Problem (Code Included)

    Because a projected separation is calculated assuming the distances to each are the same. Any difference between the distances two is going to give a true separation that is greater than the projected one. Yes, I think the difference here is that, by projected separation, I intend to mean...
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    Projected Separation and 3D Distance Problem (Code Included)

    Hi all, I've written code that takes J2000 equatorial coordinates for 2 objects and calculates (1) the projected separation of between object 1 and object 2 at the distance of object 1, and the Euclidean (3D) distance between objects 1 and 2. The projected separations should be <= the Euclidean...
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    Benefits of Oxidizing Gold: Rust Prevention & More

    Thank you for your assistance. This is a bit of a problem then, and my complete lack of Chemistry knowledge compounds this. My ultimate goal is the deposition of DPPC (a membrane protein) on to gold by vesicle fusion. The paper that I've been referencing claims they used a gold substrate that...
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    Benefits of Oxidizing Gold: Rust Prevention & More

    I'm quite late to this discussion but actually it's very relevant to some recent issues that have come up in my lab: I'm looking to oxidize a 50nm gold layer on the back of a BK-7 glass prism. Despite being quite familiar with the use of Aqua Regia, I want to oxidize gold and not remove it from...
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    Transmission function of diffraction grating aperture

    Homework Statement The aperture has vertical opaque strips of width, a, separated by open spaces of width 2a. The width of the overall aperture is L = 19a. a) Write a transmission function for this aperture. b) What would the field distribution be, at a plane in the Fraunhofer zone, if the...
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    Defining Randomness: Is It Based on Algorithms or Physics?

    It's my understanding that randomness is a pretty hard concept to nail down, and I believe there is still debate as to whether there even exists true randomness - it depends on your definition, which bring us back to your question. I believe computers can only generate pseudo-randomness, and...
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    Heat equation PDE for spherical case

    Actually if you look at my initial post you may find that there are a few details that make the generalization from these resources a little difficult, hence my plea for help on this forum. I even found a few better resources than those by googling but not until I got Carslaw & Jeager's book...
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    Heat equation PDE for spherical case

    Come now, it's almost been a week! I'm interested in 1D and 2D solutions as well if that makes it easier. I hope to have something soon, and if this really is a big problem for most people I'll write it up in latex and post a link.
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    Heat equation PDE for spherical case

    Hello, I believe this is my first post. I would like to solve the heat equation PDE with some special (but not complicated) initial conditions, my scenario is as follows: A perfectly spherical mass of water, where the outer surface is at some particular temperature at t=0 (but not held at...
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    Laurent Series and Partial Fractions: Exam Help Requested

    Alright, so I now understand it's because of the convergence in particular regions but I'm still not 100% on this.
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    Laurent Series and Partial Fractions: Exam Help Requested

    Hello all, I've got an exam tomorrow so any quick responses would be appreciated. I'm following the Boas section on Laurent series... Anyway, here's my problem: In an example Boas starts with f(z) = 12/(z(2-z)(1+z), and then using partial fractions arrives at f(z) = (4/z)(1/(1+z) +...
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