Full-scale ship-structure ice impact laboratory experiments: experimental apparatus and initial results
Bibliographic record
Abstract
This article presents the results of three ice impacts against a stiffened panel cut from the recently decommissioned ex-HMCS IROQUOIS. The upgraded experimental apparatus (the large double-pendulum), its sensors, and experimental conditions are also presented. The apparatus consists of two pendulums, one constrains and supports an ice feature, and the other constrains and supports a ship hull grillage structure. The first ice impact had data integrity and ice cone geometry issues, and so is treated as a commissioning test. During the second impact the impact force peaked at 553.9 kN, the total impact duration was 0.055 s and the hull plating acceleration at the centre of the impacted location was a maximum of 10877 m/s2. The third impact exhibited a peak force of 773.6 kN, 9691 m/s2 of acceleration, and had an impact duration of 0.039 s.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 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".