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non évolutifs à l’échelle du temps de la mesure

English translation: not changing over the measurement timescale

12:42 Jan 11, 2008
French to English translations [PRO]
Tech/Engineering - Engineering (general) / landfill management
French term or phrase: non évolutifs à l’échelle du temps de la mesure
See right at the end of the paragraph below, taken from a document about landfill management and techniques.

Les expériences ont notamment montré que la dépendance de la température sur la conductivité pour des milieux simples saturés en lixiviats était de 2 % par degré Celsius. Elles ont également montré que la loi d’Archie (loi empirique des sols reliant la teneur en eau et la résistivité) pouvait s’appliquer sur un échantillon de 1 m3 de déchets (non évolutifs à l’échelle du temps de la mesure).

I am slightly confused by the way this is written in the French. Does that last bit mean something like this:

'...They also showed that the Archie’s law (the empirical law of soils which links water content and resistivity) could be applied to a 1m3 sample from waste which does not change during the measurement time' ?

Would be most grateful for enlightenment, as right now I am not sure. Thanks in advance.
French2English
United Kingdom
Local time: 23:13
English translation:not changing over the measurement timescale
Explanation:
This means that the measurements were sufficiently quick that the measurand did not change during them.
One other thing: surely conductivity is dependent on temp, not the other way round? This is certainly how usually expressed! Later implied by "2% per deg C".

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Note added at 10 mins (2008-01-11 12:53:11 GMT)
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"invariant" sounds a bit more technical!
Selected response from:

chris collister
France
Local time: 00:13
Grading comment
Selected automatically based on peer agreement.
4 KudoZ points were awarded for this answer



Summary of answers provided
4 +3not changing over the measurement timescale
chris collister


Discussion entries: 1





  

Answers


7 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +3
not changing over the measurement timescale


Explanation:
This means that the measurements were sufficiently quick that the measurand did not change during them.
One other thing: surely conductivity is dependent on temp, not the other way round? This is certainly how usually expressed! Later implied by "2% per deg C".

--------------------------------------------------
Note added at 10 mins (2008-01-11 12:53:11 GMT)
--------------------------------------------------

"invariant" sounds a bit more technical!

chris collister
France
Local time: 00:13
Works in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 250
Grading comment
Selected automatically based on peer agreement.

Peer comments on this answer (and responses from the answerer)
agree  Expialidocio (X)
22 mins
agree  Bourth (X): I suspect they R talking about the temp. inside a body of decomposing waste (compost), which may well B affected by the conductivity of the waste, i.e. this is not electrical conductivity. W. a panhandle, the temp where U hold depends on th. conductivity.
36 mins
  -> Archie's law does relate resistivity to porosity and hence percolation, so I think conductivity is electrical here. Depends on how you interpret "dependance de...sur..."
agree  Charles Hawtrey (X)
4 hrs
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