Evaluations Of New Protective Uniforms Must Include Heat Strain During MOPP1 To Determine Heat Tolerance During MOPP4
Bibliographic record
Abstract
New biological and chemical protective uniforms are designed to lower heat strain and increase exposure time (ET) when worn in the highest state of military oriented protective posture (MOPP 4). However, these garments are also intended to replace the normal battle dress uniform (BDU) and worn when the threat is low, or MOPP 1. PURPOSE: The purposes of this study were twofold; first, to examine whether heat strain experienced during MOPP 1 impacted on ET after the transition to MOPP 4; and second, to determine whether the use of vents in the arms and legs of the new CBplus uniform reduced heat strain during MOPP 1 and increased ET during MOPP 4. METHODS: Eight males (34 ± 8 y, 87 ± 11 kg, 181 ± 7 cm) performed a familiarization session and 4 trials at 35°C and 50% relative humidity with low wind (1 m/s) walking at 4.5 km/h for 90 min in MOPP 1 and up to a further 90 min in MOPP 4. For trial A subjects wore BDU in MOPP 1 with an overgarment during MOPP 4. Trial B was a 1-piece uniform worn over underwear and a T-shirt in MOPP 1 and MOPP 4 whereas trials C and D involved wearing the CBplus 2-piece uniform over underwear and a T-shirt. During D vents along the arm and upper and lower leg were opened in MOPP 1 but closed during MOPP 4 whereas the vents were closed at all times for C. All trials included the wearing of fragmentation and tactical assault vests and a helmet. RESULTS: Heart rates were lowest during MOPP 1 for A (114 ± 14) andD (114± 13)versusB(122± 19) and C (122 ± 17). Likewise, skin temperature during MOPP 1 was lower for D (35.2 ± 0.8°C) than B (35.8 ± 1.0°C) and C (35.6 ± 1.0°C). Also, A(35.4± 1.0°C) was lower than B. After 90 min in MOPP 1 rectal temperature (Tre) had increased the least in A (0.84 ± 0.2°C) versus the other trials and was significantly lower for D (0.96 ± 0.33°C) compared with C (1.04 ± 0.3°C). Tre increased rapidly during MOPP 4 for A, which also had the shortest ET (40 ± 9 min). The increased thermal strain during MOPP 1 for B offset its theoretical advantage in MOPP 4 such that ET (46 ± 21) min was similar to A. Differences in Tre between C and D remained during MOPP 4 where ET was increased during D (74 ±17 min) and C (62 ±19 min). CONCLUSIONS: It was concluded that the heat strain generated during MOPP 1 impacted ET following the transition to MOPP 4, and the use of vents in the arms and legs of the CBplus uniform reduced heat strain during MOPP 1 thereby increasing ET during MOPP 4.
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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) | 0.001 | 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 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".