[ot] life of bright LED

[Rick Bowers]

At 5/16/2007 05:17 PM, you wrote:
>On Wed, 2007-05-16 at 19:06 +0800, Man-wai Chang wrote:
> > > There is a book with all the pills in color plates.
> >
> > Out of curiosity, is there a rule among pill manufacturers to guarantee
> > each pill have a unique appearance (like public IPs)?
> >
>
>Public IPs is not a good comparison, I think. MAC address is more
>appropriate.
>
>And for that comparison, theoretically you can develop rules like:
>
>- for the left half of the pills, the color is unique among
>manufacturers, e.g. manufacturer A using color 0x0a0a0a, manufacturer B
>using color 0x0b0b0b. With this first rule, you know which pills are of
>which manufacturers.
>
>- for the right half of the pills, each manufacturer can assign
>different colors for different products.
>
>Then we have to invent the glasses that can help the nurses to read the
>colors correctly, and they will look up some drug-color database
>( perhaps on some Linux servers ) to find out the name of the drugs.
>
>Or for the sake of simplicity, doctors just give you prescriptions like
>"use 0A14FCFE123B for three days"
>
>Vu

How does one tell the "left half" from the "right half" when most 
pills are round or capsules or some other symmetrical shape? Without 
markings, there is no "up", "down", "left" or "right".

~Rick


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