Anybody using Bluetooth ? It seems to take too long to lower chipset prices.
What is the cheapest chipset now in the market ?

Regards,

Pedro



----- Original Message -----
From: "William Chops Westfield" <westfw@MAC.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Monday, November 17, 2003 11:34 PM
Subject: Re: [OT]: Willow tree biomass - multiplies input energy by 11


> On Monday, Nov 17, 2003, at 15:44 US/Pacific, Jake Anderson wrote:
> >
> > you say that USA uses 100 times the energy of the incident sunlight?
> >
> Actually, I think he said that fossil fuel consumption is equivalent to
> 100 times the incident sunlight energy, after assuming horrendous
> (but not necessarilly incorrect) conversion factors for each of the
> stages
> from sunlight->biomass->...->fossilfuel.  This is a way of including the
> difficulties (ie inefficiency) of creating the fossil fuels; we're using
> up the fossil fuels at a rate 100 times that with which they could
> possibly
> be replaced...
>
> But I'm not sure it's relevant.  The whole point of alternative energy
> sources,  including solar and biomass, is to replace those inefficient
> steps with more efficient ones, or eliminate them entirely.  So a solar
> cell converts sunlight directly at better than 10% efficiency (not
> counting
> manufacturing/etc, which you do need to count sooner or later), which is
> better than solar to biomass efficiency, and much much better than solar
> to fossil fuel to electricity conversion.  Biomass research presumably
> includes finding plants that are more efficient than "average", and I
> assume the point of the original posting was that someone was claiming
> that willow trees were more efficient that some other fuels.  (Willows
> make great charcoal for fireworks, btw...)
>
> So the article claims that there's about a 10:1 payback for willow
> biomass,
> and the counter-argument is that if that "1" HAS to be fossil fuels,
> it's
> not nearly efficient enough to reach a steady state...  But we don't
> really
> know how much of the "1" needs to be fossil fuels, because there isn't a
> lot of effort directed at running willow harvesting appliances off of
> willow wood.  Yet.  Presumably, willow is better than "something else",
> or there wouldn't be a paper.  At least in some growing conditions.
>
> Personally, I want direct ethanol fuel cells, at the end of a grow,
> ferment,
> fuel cell chain that's both shorter and more efficient than fossil fuel
> generations.  The whole Bush "hydrogen fuel cell" thing is a bit
> depressing,
> because large scale hydrogen generation currently uses ... fossil
> fuels.  I
> guess he had to keep his oil buddies happy :-(
>
> BillW
>
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