AI-GEOSTATS: Problem with web server

[Gregoire Dubois]

Dear all,

when trying to access www.ai-geostats.org, you may have noticed since Friday
that a userid  password are required. 

This problem is due to a change in the configuration of the computer network
of the University of Lausanne. People are currently working on the problem and
I hope the server will soon be accessible again. 

Sorry for the bad news, 

Gregoire (moderator of AI-GEOSTATS)

PS: archives of emails sent to the list are located elsewhere:

http://groups.yahoo.com/group/new_ai_geostats/



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Re: AI-GEOSTATS: measurement error variance

[Adrian Martínez Vargas]

The nugget effect can be related with:

a) Short range variability.
b) Measurement error.

Some times when your data is spaced appear a nugget effect, it can be solved
by including more closed samples in variograms or analysing the behaviour in
les spaced data in separated variograms.

Then having the short variability you or measurement error you can separate
both components of the nugget (variance at ~0 distance).

Note: I have never see these in any paper, it is based in logic, the I
suggest to you base your analysis in quality more than in quantity.

King Regards,

Adrian Martínez Vargas
ISMM, Las coloradas s/n
Moa Holguín Cuba
CP 83329

- Original Message -
From: Celia Bulit
To: lista Geostats
Sent: Saturday, August 10, 2002 11:24 AM
Subject: AI-GEOSTATS: measurement error variance


Dear all:

has anyone some suggestions for estimating the measurement error variance as
a component of the nugget, based on replicates data ?

Thank you for your attention
~~~
Celia Bulit
Depto. El Hombre y su Ambiente
UAM-Xochimilco
Calzada del Hueso 1100
04960 México D.F.
México

tel.:(5255)-5483-7360
(home)   (5255)-5606-5568




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