Evolution of an Inertial Measurement System called MOTAN: Summary of Installations on Five Ice-Strengthened Ships
Bibliographic record
Abstract
This paper provides a description of MOTAN, an inertial motion a measurement system that has been used to measure ice-induced global impact forces on ships since the year 2000. Measurements from three ships are used to show that MOTAN measures whole-ship motions reliably, and that those motions can be used to determine global impact forces on ships with reasonable accuracy. Data from the CCGS Terry Fox are used to show that MOTAN and two other, independent instrumentation systems measured impact forces that were in good agreement. Having demonstrated that MOTAN is a viable means of measuring global impact forces on ships, the discussion focuses upon more recent efforts to develop an autonomous MOTAN, i.e. a system that operates unattended during a ship’s entire operating season. To date, the autonomous MOTAN has been installed on two ships: CCGS Henry Larsen and the M/T Véga Desgagnés, with the objective of using the data to determine statistical information about the magnitude and frequency of global loads that a ship experiences during its operating season.
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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 | 0.003 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".