Broadband waterborne hammer seismic source for imaging river and lake sub-bottoms
Bibliographic record
Abstract
Waterborne surveys were conducted using a handheld hammer hitting a rod attached to an aluminum plate with a single channel hydrophone eel. The broadband signal generated by this recording system produces a data set that can be processed in multiple frequency bands such at 0.5 kHz, 1.5 kHz, 3.5 kHz and 5.5 kHz. The lowest frequency band shows a greater capacity of penetration with reflections observed below high impedance contrasts such as till and sand-gravel layers. The higher frequency bands show the lacustrine sediment layers with greater penetration than that acquired with a 15 kHz CHIRP acoustic profiler system. A survey across Round Lake, Ontario, revealed faulted structures that are interpreted preliminarily to be mass movement-related. A second survey across the Ottawa River, Ontario-Quebec, reveals a buried gorge and a complex sedimentation interpreted as flood-related erosion and deposition. Presentation Date: Monday, September 16, 2019 Session Start Time: 1:50 PM Presentation Time: 2:40 PM Location: 217C Presentation Type: Oral
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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 | 0.001 | 0.001 |
| 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) | 0.010 | 0.001 |
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".