Technical evaluation of an allergen Challenge TheatreTM
Bibliographic record
Abstract
Allergen challenge chambers expose allergen-sensitive subjects to a predetermined concentration of allergen in a closed, controlled environment and provide a mechanism to induce clinical symptoms and measure the effect of medication. A technical evaluation of the capabilities of the Red Maple Trials Allergen Challenge Theatre was performed. The theatre is a 4-zone facility holding up to 99 seats in a series of elevated rows. Grass ( Phleum pratense ) and ragweed ( Ambrosia artemisiifolia ) pollens were injected into the air supply and blown into the facility through ducts located across the top of the front wall. Grass and ragweed pollen concentrations were measured on impact samplers set at face level in 5 sections of a T-shaped quadrant. Concentrations were measured every 30 minutes for 150 minutes. Continuous pollen counts were also read by a laser particle counter (LPC) set to read particles > 5µm and positioned 5 feet above floor level. The impact sampler pollen concentration for the theatre quadrant during the entire 180-minute exposure was 3992 ± 975 grains m . Concentrations for the quadrant were consistent at each 30-minute measurement with means ranging from 3648 to 4523 and SDs from 678 to 1105. Pollen concentrations were consistent in each of the 5 sections of the quadrant over time with means ranging from 3112 to 5268 and SDs ranging from 308 to 926. Pollen counts measured by LPC remained consistent at 4000 per m during the experiment. There was a linear relationship between the LPC pollen readings and the impact sampler readings. The Red Maple Trials allergen exposure theatre demonstrated the capacity to achieve and maintain a concentration of pollen grains at a magnitude consistent with the literature and associated with the ability to induce symptoms of appropriate intensity upon allergen challenge. The use of an LPC provided a significant advantage by monitoring pollen counts on a continuous basis. The chamber with a seating capacity of 99 places has the ability to evaluate large test groups at a time.
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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 | 0.006 | 0.005 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.008 | 0.002 |
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".