Date: Wed Feb 7 13:32:44 2007

Author: --- trappe

Subject: Re: List conversations. Please Read.

Post:
Rick, that is an extremely good analogy. And certainly I catch the
gist that global means more than local. I believe the politician who
is peddling most of this issue has been astute enough (advised after
the fact?) to suggest that the term global warming is
inappropriate...but I'll not sit through the video again, just to
locate that quote...

Perhaps we should be more specific in terming the effect "Warming
localized to ice geographies", even, specifically, the *ONE* locality
where the core samples were drilled. I suspect that the correlations
are much greater than John would have us believe, but his caution is
part of the process of review.

What is not part of the process happened when the tobacco companies
bought "evidence" that smoking was not related to cancer. And, this
(purchasing of opinions) is too close for us to go down that path,
again.
Karl

Quoting Rick Tarara :

>
> ----- Original Message ----- From:
>>
>> In science, a hypothesis is *JUST A GUESS*. In science, the
>> researcher cannot have a vested interest in "being right". The
>> scientist must report the bad with the good, or so we claim.
>>
>> I wonder if our lab proceedures in Physics reinforce this notion
>> when student lab reports state that they proved what they started
>> out to prove (what they learned ahead of time in lecture).
>>
>
> Such a procedure (which I'm going to guess many incorporate) can be
> used during a more-or-less standard pendulum lab. First of all, try to
> do the experiment before the topic is covered in lab--do it as a
> 'figure out what the period of this thing depends on'. No theory, no
> sophisticated hypothesis, just breaking down the possible variables and
> then designing ways to study their effects. THEN a good trick is to
> break up the work into various groups--who report back to the
> whole--AND break up those looking at the length into short, medium, and
> long groups. What happens there is that each group's data can be
> interpreted as linear (well the 'short' group may see some curvature).
> Only when ALL the data are combined is it clear that the relationship
> between period and length is not linear. The lesson--which must be
> emphasized (few will catch it on their own)-- is that we can be easily
> fooled by incomplete data sets. More data is always better. This also
> relates to John's point about not using local phenomena to make global
> statements.
>
> Rick
>
> ***************************
> Richard W. Tarara
> Professor of Physics
> Saint Mary's College
> Notre Dame, IN
> rtarara@saintmarys.edu
> ******************************
> Free Physics Software
> PC & Mac
> www.saintmarys.edu/~rtarara/software.html
> *******************************





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