Comparison of measured and modelled transmission loss in emerald basin
Bibliographic record
Abstract
The measured and modeled transmission loss (TL) in the Emerald Basin was investigated. An acoustic projector was towed at 50-m depth by the research ship CFAV Quest. The transmitted signal consisted of 11 continuous-wave (CW) tones spaced 100 Hz apart from 1010 to 2010 Hz. The sonobuoy receivers were set for a depth of either 60 m or 120 m, and the received acoustic signals were relayed to the ship over a radio-frequency (RF) telemetry link. A sound-speed profile from the day of the experiment shows a pronounced duct with an axis close to the source depth. The data collected during the sea trial were later processed to yield estimates of the transmission loss through the equation TL = SL-SPL, where SL is the projector source level and SPL was the sound pressure level at the receiver. The curves at the different frequencies cluster quite closely together, but the TL was markedly less for the 60-m receiver than for the 120-m receiver. It was observed that the TL curves for the 60-m receiver display the low loss.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".