Biodegradation of wave-formed sand ripples during SAX04 (Sediment Acoustics Experiment 2004)
Bibliographic record
Abstract
The gradual decay of 50- to 70-cm-wavelength sand ripples over a 20-day period of continuous in situ observations is presented. The ripples formed midway through the SAX04 experiment during Tropical Storm Matthew, and the observation period began immediately following this event. Bed elevation profiles and planform images of the ripple field were obtained at centimeter-scale resolution using rotary sonars, and at millimeter-scale resolution using a laser-video bed profiling system. Low-frequency currents, wave orbital velocities, and near-bed turbulence were monitored simultaneously with colocated instruments. The observed rates of change of the principal components of the bed elevation spectrum and of the spatially integrated backscatter intensity differences are presented and compared to predictions made with a diffusivity-based model of the ripple decay process. The model-data comparisons yield values for the horizontal sediment diffusivity which are consistent with previous measurements using particle-counting techniques.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".