[Population Modeling] Re: PopModWkGrpIMAG-news Digest, Vol 3,
Issue 20
John Rice
john.rice at noboxes.org
Mon Jan 19 08:44:05 PST 2015
Thank you Tony for offering a 'sea anchor'. Old navy guy here. Sea
anchors are used when the water is too deep for the available bottom anchor
chain. The do not STOP drift, but the do slow it down. Definitions from
authoritative general dictionaries are needed. In fact, personally, I
think that the rate as which people keep redefining a term to make it fit
some esoteric narrow application is wiping out our language system. There
are definitions for the work Population as a construct. If those
definitions do not that do not describe what we mean, then we are using the
wrong word. Find, or Oh My, create a new word. The advantage of creation
is that early in its use anyone who reads it will have to 'ask' what it
mean rather than taking off thinking they know what we mean.
I will get and post a few more (Method, Process, Procedure) any of which
might be use following Tony's lead that "PM (for now, or whatever we end up
calling it) is a (method, process, procedure, or some else) that uses
?????? for the purpose of ???????? " "It is characterize by ??????, and
differs from other similar form of (modeling, computation. ??) such as ??,
??, ??, which it may employ in part in that it ???????.
So all we need to do is fill in the ?????s.
On Mon, Jan 19, 2015 at 5:05 AM, <popmodwkgrpimag-news-request at simtk.org>
wrote:
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> Today's Topics:
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> 1. PopModWkGrpIMAG-news Digest, Vol 3, Issue 17 (Hunt, C. Anthony)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 18 Jan 2015 20:13:51 +0000
> From: "Hunt, C. Anthony" <a.hunt at ucsf.edu>
> Subject: [Population Modeling] PopModWkGrpIMAG-news Digest, Vol 3,
> Issue 17
> To: "popmodwkgrpimag-news at simtk.org" <popmodwkgrpimag-news at simtk.org>
> Message-ID: <D0E14B56.2A387F%a.hunt at ucsf.edu>
> Content-Type: text/plain; charset="utf-8"
>
> I offer some musings regarding defining population modeling (PM).
> Population modeling is an activity. For members of this group it is a
> process with a purpose. Identifying this group's PM process purposes will
> help to define what PM means to us.
>
> Given those purposes, the processes employed by members of this group are
> drawn from a relatively specialized set of methods. Identifying the
> group's method's will further define what PM means to us.
>
> Given those two constraints, I think that Merriam-Webster Unabridged
> definitions of population are adequate (for our needs):
>
> 1 a : the whole number of people or inhabitants occupying a specific
> geographical locality (as an institution, a country, a world)
> [I might replace "people or inhabitants" with entities]
> 1 b : the total number or amount of things especially within a given area
>
> 2 : the act or process of populating
> [may apply only rarely]
>
> 3 a : a body of persons having some quality or characteristic in common
> and usually thought of as occupying a particular area
> [I might replace "persons" with entities, and (this is minor)
> "area" with
> space]
> 3 b (1) : the organisms inhabiting a particular area or biotope
> 3 b (2) : a group of interbreeding biotypes that represents the level of
> organization at which speciation begins
>
> 4 mathematics : a group of individual persons, objects, or items from
> which samples are taken for measurement statistically
>
>
> -T-
>
> On 1/17/15 2:06 AM, "popmodwkgrpimag-news-request at simtk.org"
> <popmodwkgrpimag-news-request at simtk.org> wrote:
>
> >Today's Topics:
> >
> > 1. Re: Population modeling definition (Jacob Barhak)
> >
> >
> >----------------------------------------------------------------------
> >
> >Message: 1
> >Date: Fri, 16 Jan 2015 04:07:08 -0600
> >From: Jacob Barhak <jacob.barhak at gmail.com>
> >Subject: Re: [Population Modeling] Population modeling definition
> >To: Talitha Feenstra <talitha.feenstra at rivm.nl>
> >Cc: popmodwkgrpimag-news at simtk.org
> >Message-ID:
> > <CAM_y+3S_D1e1GhKA_8C8zvTeijA2_3nEupq61Jx1h-=
> s6mmGAA at mail.gmail.com>
> >Content-Type: text/plain; charset="utf-8"
> >
> >Hi Talitha, Hi John, Hi Olaf, Hi Steve, Hi Stephan, Hi Al, and greeting to
> >all others who have not participated yet.
> >
> >You have contributed thoughts to this discussion. I would like to point to
> >two issues I see and add a third issue to the discussion
> >
> >1. Dictionary like definition:
> >John and Olaf are trying to define the term like a dictionary. In this
> >perspective, I myself would interpret population as: "A collection of X"
> >where X can change as Madhav suggested before. It is probably a noun
> >describing plurality of X.
> >
> >2. Definition by Models included:
> >However, perhaps a more interesting discussion is what kind of models fall
> >into our category. I recall Al and Steve trying to include Markov models,
> >while Talitha and previously Stephan are excluding Markov Cohort models
> >from falling within our definition of population modeling. This is to the
> >best of my understating and I am surprised that Talitha suggested a strict
> >definition since she some of her work is Markov model based.
> >
> >What would you all feel about including Markov models within population
> >modeling only if they stratify the cohort by age, gender, and/or other
> >parameters. And non stratified models will define these as cohort models
> >outside population modeling?
> >
> >3. Modeling of individual uncertainty
> >This is another question. Would we consider description of uncertainty of
> >parameters in an individual within our population modeling group? For
> >example, does defining distribution of height of a person by mean,
> >variance, and distribution function fall into our category? After all we
> >are modeling a single entity from information derived from a population. I
> >would say yes, especially if the information is extracted from a
> >population
> >that we can name. But what about correlation between anthropometric
> >features such as defining the mean ratio between height and arm length as
> >one number? Will one number be sufficient to call it population modeling
> >or do we need a distribution? I would say if the number is associated to a
> >population cohort then perhaps, and defiantly yes if we have several
> >numbers associated with different population cohorts.
> >
> >I am interested to learn more what others think of those questions. I hope
> >others will join this discussion.
> >
> > Jacob
>
>
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> End of PopModWkGrpIMAG-news Digest, Vol 3, Issue 20
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>
--
"Where there is much desire to learn, here of necessity will be much
arguing,
much writing, many opinions; for opinion in good men is but knowledge in
the making."
John Milton (1608 - 1674)
Cellular 757 318 0671
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