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If I have a power supply (not a computer power supply, just a battery-replacing wall wart) and it doesn't have the usual polarity marking, how to I know if the tip is positive or negative?
Update: I couldn't find my multimeter. I did find a model number on the power supply and typed it into Google…
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On my USB hub where the power supply plugs in, the polarity is unmarked (I got it used, from my brother's friend). I need to know what the polarity should be.
I don't think it makes a difference about the brand. Could someone who has a USB hub tell me what the polarity markings are?
This is why…
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how do i switch my camera battery and the battery type
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Hello,
How do I qery individulas in my ontology, here is a description of what I would like to do (similar to SQL queries):
I have three classes (components, features, and polarity). The polarity value can be positive_polarity or negative_polarity, both are subclasses of polarity.
a_component hasFeature…
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I'm building a web semantic project that gathers the maximum ammount of historic data about a certain company and tries to predict its future market stock values.
For data I have the historic stock values (not normalized), news (0 to 1 polarity) and subjective content (also a 0 to 1 polarity).
What…
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