Centrifuge Model Testing of Liquefaction Mitigation via Denitrification-Induced Desaturation
Why this work is in the frame
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Bibliographic record
Abstract
Centrifuge model tests were conducted to evaluate the potential for earthquake-induced soil liquefaction mitigation via microbially mediated denitrification (dissimilatory reduction of nitrogen). Desaturation by denitrifying bacteria is the first stage of a two-stage process to increase earthquake-induced liquefaction resistance referred to as microbially induced desaturation and precipitation (MIDP). In the test described herein, denitrification was induced in Ottawa F-65 sand on the 1-m radius centrifuge at the University of California, Davis NHERI/CGM centrifuge. The degree of saturation was monitored during testing by monitoring soil moisture content. After monitoring indicated that significant desaturation had been induced at 1 g by an enriched denitrifying microorganism culture, the model was accelerated to 80 g. Saturation measurements during spin-up provided insight on the influence of steady state pore pressure on biogenic gas desaturation. Cyclic loading during the ultimate centrifuge acceleration of 80 g demonstrated desaturation via MIDP has potential to mitigate earthquake-induced soil liquefaction.
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Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it