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Comment Background noise correction? (Score 1) 79

Would be my first thought when I see negative energy readings. If a sensor produces a signal when no radiation hits it, then the average level of this signal is substracted. Since such a signal normally has a noise it will result in some negative values. Then it would not be an error.
I don't see any details on what kind of sensor this is though, or what kind of energy it measures. So I can't tell if it is that.

Comment Re:don't think this is a good idea (Score 1) 82

3d printing can have other advantages too, for example it can create very lightweight parts with a mesh structure, or other structures that are impossible to make out of one part conventionally. It can also be worthwhile for very complex parts, which would have to be made out of many parts otherwise.

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