[meteorite-list] Ben Guerir TKW and TAW

From: Martin Altmann <Altmann_at_meteoritecentral.com>
Date: Thu Sep 8 09:11:40 2005
Message-ID: <006c01c5b478$5015ac40$6389fea9_at_9y6y40j>

Yes, I suggest that, what all want to know, the newest concept:

W

(= the weight of da meteorite).
All other tkws, taws, crws are functions of time.

More seriously, I think the only possible approach, is the syssiphic labour
Joern does with his Metbase.
Difficult if one should informal notices should be add to the published
weights....

Buckleboo!

PS: From Benguerir police confiscated specimens, the locals had collected,
only to sell them to dealers.

PPS: tickets, tickets, folks buy tickets!!!

----- Original Message -----
From: "Martin H." <planetwhy_at_yahoo.com>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Thursday, September 08, 2005 2:55 PM
Subject: Re: [meteorite-list] Ben Guerir TKW and TAW


> Hi All,
>
> The concept of TAW (total available weight) is the
> third iteration of TKW (total known weight). The two
> previous directions were made independent of each
> other, but essentially came to the same conclusion. I
> came up with the concept of eTKW or effective total
> weight for my Accretion Desk article in June of 2004.
> Here is the link:
>
> http://www.meteoritetimes.com/Back_Links/2004/June/Accretion_Desk.htm
>
> I based the eTKW concept on population dynamics of
> animals where, say like the grizzlies in Yellowstone
> National Park, there might be a known number of bears,
> but situation dictates that the population in the Park
> behaves as if a much lower number. So eTKW reflects
> when there might be a large quantity of the material
> that fell, but due to some circumstances, the actual
> amount of material available in separate pieces may be
> extremely low. Major examples include the Willamette
> and Hoba irons.
>
> Another take on the issue is with Kevin K.'s TRW or
> total repository weight. In this method, one simply
> adds up the weight of material published in collection
> catalogs, or as listed in the Catalogue (British).
> Kevin wrote about this in his book and in Meteorite
> Magazine. This number gains great importance when much
> of the original mass has been lost over time.
>
> So the TAW is yet another attempt to quantify the
> material in a way useful beyond the general statistics
> of the discovery.
>
> Anyone else want to take a stab at this issue?
>
> Cheers,
>
> Martin
>
>
>
>
> --- Jeff Grossman <jgrossman_at_usgs.gov> wrote:
>
> > No, I don't think so. My point is that
> > "availability" depends on who
> > you are. A typical scientist has neither a large
> > (or any) meteorite
> > collection nor a budget for purchasing specimens.
> > To him or her,
> > privately owned meteorites are not directly
> > available. It's
> > different for a researcher at a large museum, who
> > has significant
> > trading power and/or an acquisition budget. In the
> > same way a
> > collector with a small collection has little trading
> > power, so many
> > museum specimens seem unavailable. However,
> > big-time dealers have
> > the wherewithal to negotiate trades with museums for
> > some very
> > special meteorites not normally considered
> > available. For those
> > collectors or scientists with the greatest
> > resources, nearly
> > everything is theoretically available except for
> > objects of
> > extraordinary significance.
> >
> > So it's not a useful quantity, this "TAW." There's
> > no way to define
> > it unless you want to change the A to stand for
> > Advertised.
> >
> > jeff
> >
> > At 08:56 PM 9/7/2005, stan . wrote:
> >
> > >I think you have it all backwards. institutions
> > ALWAS have things
> > >that the colelcting public would give their eye
> > teeth to get ahold
> > >of, making nearly anything in the hands of
> > colelctors avalible to the
> > >researchers if they want to go out and get it one
> > way or the
> > >other... now what lab wants to do a study on a nice
> > big 100 lbs nwa
> > >869 and has a 100g nakhla individual laying around
> > that they dont need? :)
> > >
> > >
> > >>Gee, I would define Total Available Weight as that
> > material which
> > >>is accessible and ready for use in scientific
> > research. This would
> > >>include the pieces in Morocco museums, but not
> > pieces in the hands
> > >>of collectors.
> > >>
> > >>Availability is a matter of perspective and
> > access, which is
> > >>different for different people.
> > >
> > >
> > >______________________________________________
> > >Meteorite-list mailing list
> > >Meteorite-list_at_meteoritecentral.com
> >
> >http://six.pairlist.net/mailman/listinfo/meteorite-list
> >
> > ______________________________________________
> > Meteorite-list mailing list
> > Meteorite-list_at_meteoritecentral.com
> >
> http://six.pairlist.net/mailman/listinfo/meteorite-list
> >
>
>
>
>
>
> ______________________________________________________
> Click here to donate to the Hurricane Katrina relief effort.
> http://store.yahoo.com/redcross-donate3/
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list_at_meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list
Received on Thu 08 Sep 2005 09:22:06 AM PDT