Whole-ship motions and accelerations at the stern of the CCGS Louis S. St. Laurent : October 2000 ice trials
Bibliographic record
Abstract
The MOTAN inertial measurement system was used to determine whole-ship motions and accelerations at the stern of the LOUIS S. ST-LAURENT during the October 2000 ice trials. A total of 43 ice impact events were recorded during the trials, most of which involved secondyear and multi-year floes. Impact speeds ranged from 2 to 16 kt. Since the objective of the October 2000 Trials was to examine propeller-ice interaction, data from the MOTAN sensor, which was installed near the ship舗s centre of gravity, were used to compute the whole-ship motions at the ship舗s centre propeller, in the stern. During the 43 events, maximum accelerations in heave, sway and surge were 1.1 m/s², 1.9 m/s² and 1.0 m/s² respectively, at the centre propeller. The events produced a maximum roll of 7.6°, compared to maximum a pitch and yaw of 1.8° and 1.5°, respectively. Maximum accelerations in roll, pitch and yaw were 2.8 deg/s², 1.8 deg/s² and 1.5 deg/s² respectively. Results showed no apparent relation between impact speed and the measured whole-ship motions. Very few of the impact events qualified as symmetrical, head-on impacts where ship motions are primarily in heave and pitch; roll and yaw motions were a significant component of most of the impact events.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| 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".