Recent content by Alex_F

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    High School Electrostatic charge build up in environmental electron microscopy

    That is correct. This is explained very well in this article https://www.nature.com/articles/nmat898.
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    High School Electrostatic charge build up in environmental electron microscopy

    Thanks for your answer. I suppose that it might be the case that the discharge process relies solely on the presence of humid air inside ESEM to wash off and carry the charges away from the sample, but I am not sure.
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    High School Electrostatic charge build up in environmental electron microscopy

    Hello, If I understand it correctly, the samples are grounded inside a scanning electron microscope (SEM) to avoid charge build up through the electron beam. Also the non-conductive are coated with a conductive layer, so they can be grounded as well. However, I do not know how the charge build...
    • Alex_F
    • Thread
    • Build Charge Electron Electron microscopy Electrostatic Electrostatic charges Environmental Grounding Microscopy
    • Replies: 7
    • Forum: Atomic and Condensed Matter
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    Undergrad Index and bound shift in converting a sum into integral

    Actually this is not written by me. I have seen this in a book and also couple of articles. So I suppose that is correct.
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    Undergrad Index and bound shift in converting a sum into integral

    Considering the below equality (or equivalency), could someone please explain how the bounds and indices are shifted? $$\sum_{i=2}^{k}(h_i/f_{i-1})=\int_{1}^{k}(h(i)/f(i))di$$
    • Alex_F
    • Thread
    • Bound Index Integral Shift Sum
    • Replies: 6
    • Forum: Calculus
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    Undergrad Taylor expansion of an unknown function

    Thanks for your answer. You are right, it is definitely not a Taylor expansion. I think we can call it quadratic polynomial fit as the results are identical when you fit a second-order polynomial to the available data. I checked this for couple of functions and it should be also possible to...
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    Undergrad Taylor expansion of an unknown function

    Hello, I have a question regarding the Taylor expansion of an unknown function and I would be tanksful to have your comments on that. Suppose we want to find an analytical estimate for an unknown function. The available information for this function is; its exact value at x0 (f0) and first...