Pilot Head and Neck Response to Helicopter Whole Body Vibration and Head-Supported Mass
Bibliographic record
Abstract
Given the prevalence and severity of neck pain among helicopter pilots, the effects of helicopter whole body vibration (WBV) and pilot head-supported mass (HSM) on neck muscle strain and fatigue need to be understood to establish effective mitigating solutions and/or countermeasure protocols. The present study provides a preliminary assessment of pilot head and neck responses under different WBV conditions (i.e. Engines Off, Ground Idle, Hover, and Cruise) and HSM conditions (i.e. Helmet-only, Helmet+NVG) during flight operations on a Bell 412 helicopter. For both pilots, average neck electromyography (EMG) amplitudes were highest during the maximum WBV condition (Cruise) and the maximum HSM condition (Helmet+NVG). This indicates that helicopter WBV and HSM conditions jointly contribute to higher neck muscle loading, which may coincide with elevated neck muscle discomfort, strain, and fatigue. Therefore, effective mitigating solutions (e.g. vibration exposure limits, operational guidelines) must account for the combined effects of WBV and HSM to reduce or prevent neck pain among helicopter pilots.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".