Paper - The Temporal Aspect of the Drake Equation and SETI

Paper - The Temporal Aspect of the Drake Equation and SETI
Authors: Milan M. Cirkovic Tue, 10 Jun 2003, 8 pages

http://arxiv.org/abs/astro-ph/0306186

Abstract follows -
We critically investigate some evolutionary aspects of the famous
Drake equation, which is usually presented as the central guide for
the research on extraterrestrial intelligence. It is shown that the
Drake equation tacitly relies on unverifiable and possibly false
assumptions on both the physico-chemical history of our Galaxy and the
properties of advanced intelligent communities. The importance of
recent results of Lineweaver on chemical build-up of inhabitable
planets for SETI is emphasized. Two important evolutionary effects are
briefly discussed and the resolution of the difficulties within the
context of the phase-transition astrobiological models sketched.
_________________
(If you are looking for other SETI science papers to read, and you
haven't seen my previous posts, consider visiting my website at
http://www.geocities.com/exosearch , which now has quite a few links!)
Regards, Jason H.

"Russell Wallace" wrote in message
...
On 2 Aug 2003 17:42:51 -0700, (Jason H.) wrote:

(If you are looking for other SETI science papers to read, and you
haven't seen my previous posts, consider visiting my website at
http://www.geocities.com/exosearch , which now has quite a few links!)

Good page!

The article about gamma ray bursts delaying the evolution of
intelligent life was interesting, but I'm still not really convinced.
Granted that a sufficiently nearby GRB that happened to be aimed in
our direction would cause a mass extinction; from what we know of
Earth's evolutionary history, mass extinctions have on the whole been
beneficial rather than harmful.

This is interesting! The doomsayers say, look at the primian (sp?) mass
extinction where 95% of the lifeforms perished! But, hey, wait a minute!,
just hold on there buddy! :-), look at us now(!) a billion (or is it 1/2
billion?) years later!!

Species died forever, sure, but life (for better or worse or indifferently)
still flourishes on Earth regardless ...

Good point!
Al


--
"Sore wa himitsu desu."

Ok, I give, what does this mean?

To reply by email, remove
the small snack from address.
http://www.esatclear.ie/~rwallace

"Russell Wallace" wrote in message
...
On 2 Aug 2003 17:42:51 -0700, (Jason H.) wrote:

(If you are looking for other SETI science papers to read, and you
haven't seen my previous posts, consider visiting my website at
http://www.geocities.com/exosearch , which now has quite a few links!)

Good page!

The article about gamma ray bursts delaying the evolution of
intelligent life was interesting, but I'm still not really convinced.
Granted that a sufficiently nearby GRB that happened to be aimed in
our direction would cause a mass extinction; from what we know of
Earth's evolutionary history, mass extinctions have on the whole been
beneficial rather than harmful.

This is interesting! The doomsayers say, look at the primian (sp?) mass
extinction where 95% of the lifeforms perished! But, hey, wait a minute!,
just hold on there buddy! :-), look at us now(!) a billion (or is it 1/2
billion?) years later!!

Species died forever, sure, but life (for better or worse or indifferently)
still flourishes on Earth regardless ...

Good point!
Al


--
"Sore wa himitsu desu."

Ok, I give, what does this mean?

To reply by email, remove
the small snack from address.
http://www.esatclear.ie/~rwallace

On Tue, 05 Aug 2003 15:59:13 GMT, "Alfred A. Aburto Jr."
wrote:

This is interesting! The doomsayers say, look at the primian (sp?) mass
extinction where 95% of the lifeforms perished! But, hey, wait a minute!,
just hold on there buddy! :-), look at us now(!) a billion (or is it 1/2
billion?) years later!!

Exactly.

"Sore wa himitsu desu."

Ok, I give, what does this mean?

"That is a secret." It's a quote from the anime series 'Slayers Next'
- watch the series and you'll see why the line is worth quoting ^.^

--
"Sore wa himitsu desu."
To reply by email, remove
the small snack from address.
http://www.esatclear.ie/~rwallace

On Tue, 05 Aug 2003 15:59:13 GMT, "Alfred A. Aburto Jr."
wrote:

This is interesting! The doomsayers say, look at the primian (sp?) mass
extinction where 95% of the lifeforms perished! But, hey, wait a minute!,
just hold on there buddy! :-), look at us now(!) a billion (or is it 1/2
billion?) years later!!

Exactly.

"Sore wa himitsu desu."

Ok, I give, what does this mean?

"That is a secret." It's a quote from the anime series 'Slayers Next'
- watch the series and you'll see why the line is worth quoting ^.^

--
"Sore wa himitsu desu."
To reply by email, remove
the small snack from address.
http://www.esatclear.ie/~rwallace