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QxCalc
For mathematical calculations in high-school, physics, chemistry, mathematics, economics, electrical, mechanical.
Create equations, and also calculate with them, with ease.
You use the calculator the same way as you use a pen and paper. It is quite simple, and can do a lot of work given syntax correctness.
It comes with a "basic" gui, however the best way to use it is with the 'vim' editor, for which it has a syntax highlight file (calc.vim).
rcal is an interactive calculator for DOS, that loosely mimics the behavior of "roller printing" calculators. It supports huge numbers, floating point and has
extremely low hardware requirements.
Leibnitz is the calculator you've always wanted (even if you didn't know it!), short of handwriting recognition.
FAQ: https://github.com/jafl/jx_application_framework/tree/master/programs/leibnitz#readme
ChangeLog: http://leibnitz.sourceforge.net/ChangeLog.html
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for a geometric mean size of a given particle size distribution
...We will be able to modify particle size bins used in the software. If you need modifications, please let us know through the support page. For more detail, please see and cite our following paper:
Yamamoto, N., Nazaroff, W.W., Peccia, J. (2014). Assessing the aerodynamic diameters of taxon-specific fungal bioaerosols by quantitative PCR and next-generation DNA sequencing, Journal of Aerosol Science 78, 1-10.