The effect of platform motions upon the biomechanical demands of lifting tasks
Why this work is in the frame
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Bibliographic record
Abstract
The purpose of this study was to examine the biomechanical demands associated with MMH performed in moving environments. Twelve healthy male subjects performed four different lifting tasks (referred to as 10U, 15U, Close25 and Far25) while exposed to a simulated ship motion profile. Dependent measures included electromyographic (EMG) signals from several trunk muscles and thoracolumbar motions collected via a Lumbar Motion Monitor (LMM). A repeated measures ANOVA was employed to examine the differences between thoracolumbar velocities and trunk EMG activities between successful lifts and lifts during which a motion induced interruption (MII) was identified. The maximum EMG signals increased as MII events occurred for the left and right erector spinae and external obliques. The 10U lifting task significantly differed from both the Close25 and Far25 lifting tasks in the maximum left trapezius and the 10U lifting task differed from all other lifting tasks for the maximum right trapezius activities. There were increases in the maximum thoracolumbar velocities in the lateral bending and twisting planes for lifts incurring a MII across all lifting conditions when comparing successful lifts. These data suggest that performing tasks in moving environments will place an operator at an increased risk for musculoskeletal injuries, particularly when the rate of MII is high.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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) | 0.000 | 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 it