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You can read more about my academic research topics by looking at My academic profile. If you are more interested about hackerish things look at my Hacker profile. You can contact me by email, use bjonnh-web AT

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A circular slide-ruler

We had this conference in Chicago in 2016. As I was playing with the laser-cutter and making planetary motion devices see Here, I also was playing with the idea of circular slide rulers. As the calculation of elution volumes and retention in CCC and CPC are using multiplications and divisions it is possible to do these on a circular slide ruler (or a normal one) by using logarithmic scales (because additions in that space correspond to multiplications in linear scale).

Tags: ccc cpc conference laser-cutter laser
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