Micro-absorption correction in Rietveld refinement

I noticed that the thermal parameter B of my material was regularly going negative during the refinement, I tried several fixes I found online but no luck. Then I stumbled upon the micro-absorption correction, I tried implementing it and it definitely helped, although at this point I am not completely sure if I implemented it correctly. My supervisor had no idea what it is and how to use it, but together we came to the conclusion that since it definitely alters the intensity of the peaks it should be refined before the atomic coordinates, the occupation and B, and it should be fixed before refining any of those. Does that make sense? Is that a good idea? I would love to hear from someone who does actually know how to implement it.

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u/Ok_Course1403 — 13 days ago

Why don't we use capacitors to charge electric vehicles?

I know that super capacitors are expensive and capactitors don't have the energy density to power a vehicle, however wouldn't a mixed battery/capacitor improve the long charging time issue of batteries? You could cherge the capacitors super fast and have them charge the battery while driving, this way you could charge up in several few seconds stops instead of one several minute charge up. Idk about the cost effectiveness of using small super capacitor to do this, probably not worth it, but maybe with capacitor capable of charging like 10% of the battery?

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u/Ok_Course1403 — 2 months ago

KUAL not working even after common fixes on Kindle K5

I followed these steps, as suggested by u/SpartanHeavy:
1 - Install Jailbreak

  • Download "K5 JailBreak (5.0.x - 5.4.4.2)" archive from here.
  • Find the "kindle-5.4-jailbreak.zip" file and unzip it to your Kindle's root directory.
  • Select the "update your kindle" option in the settings menu.
  • After the words **** JAILBREAK **** appear at the bottom of your screen, select the "restart" option in the settings menu and wait for the Kindle to restart.

2 - Install DevCerts Update

  • Download the DevCerts zip file from here.
  • Find the update file labeled "k5-ALL_keystore-install.bin" and copy it to your Kindle's root directly.
  • Select the "update your kindle" option in the settings menu

3 - Install KUAL

  • Download "KUAL" archive from here.
  • Find the "KUAL-KDK-2.0.azw2" file in the archive and copy it to your Kindle's documents folder.

My understanding is that the DevCerts update is supposed to get rid of the error "not signed by an authorised developer", and for every instance of this problem I have seen that has been the case, however not this time, could it be because all guides are at least one year old?

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u/Ok_Course1403 — 2 months ago

How to associate colour and object in theme creator

On Powerpoint 2026 for Windows, i am able to create a theme, however I don't understand how to make it so that a color in my palette (say accent 1) is the color of all slide numbers, on default, like the default theme do. When I change it manually, changing the color palette does nothing, what am I missing?

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u/Ok_Course1403 — 4 months ago

Transfering ownership of a OneDrive folder

I know this question already got asked, but I am afraid this is a peculiar case. My colleagues all work on a shared oneDrive folder, but the owner of said folder is leaving our university, and as such her institutional account will be revoked. She already gave me editor permission, but when her account is taken down, will I still have access to the folder?

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u/Ok_Course1403 — 5 months ago

A question about Fullprof

I am performing Rietveld refinement on a material in which a site is shared between Iron and Nickel. Fullprof is not capable of refining the occupation of those atoms since their atomic number is too similar, however would it be possible to refine the occupation of the site, while keeping the Fe/Ni ratio constant? I tried fidgeting with the constraints, but I'm not very good with those.

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u/Ok_Course1403 — 5 months ago