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Record W2025212942 · doi:10.2113/jeeg10.4.365

Injection Electrode Overprinting

2005· article· en· W2025212942 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
fundA Canadian funder is recorded on the work.

Bibliographic record

VenueJournal of Environmental and Engineering Geophysics · 2005
Typearticle
Languageen
FieldEarth and Planetary Sciences
TopicGeophysical and Geoelectrical Methods
Canadian institutionsUniversity of Saskatchewan
FundersNatural Sciences and Engineering Research Council of Canada
KeywordsOverprintingElectrodeOvervoltagePolarization (electrochemistry)Materials scienceElectrical resistivity and conductivityInduced polarizationVoltageElectrical impedanceVoltOptoelectronicsElectrical engineeringGeologyChemistryEngineering

Abstract

fetched live from OpenAlex

Abstract Polarization of the injection electrodes in resistivity and induced polarization may in some cases result in an anomalous response at the receiving electrodes. This is referred to here as injection electrode overprinting. Overprinting may occur in resistivity measurements when an electrode is used as a receiving electrode immediately following duty as an injection electrode, such as in multi-electrode systems with automatic switching. The circumstances that produce overprinting are demonstrated here and recommendations are made to limit its occurrence and effect. It is found that the overvoltage on injection electrodes is unlikely to exceed a few volts and that the period of rapid, nonlinear, decay is over in a few seconds. Most modern resistivity equipment can easily accommodate potentials with these characteristics as part of spontaneous potential rejection. A simple procedure is recommended to test if overprinting is occuring. Injection sequences with short and long delays between injector-receiver duty should be executed. Any difference in apparent resistivity indicates a possible problem with overprinting. Situations where one of an injection pair has a large surface area and the other a small surface area, as is often the case in pole-pole or pole-dipole surveys, are more likely to be problematic in that the polarization and circuit impedance may depend on the polarity of the pulse.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.978
Threshold uncertainty score0.273

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.003
GPT teacher head0.162
Teacher spread0.159 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it