[ot] life of bright LED

[Vu Pham]

On Sat, 2007-05-19 at 12:54 -0400, Rick Bowers wrote:
> 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".
> 

By the colors :) 

Vu