Bibliographic record
Abstract
In the present work, the radon contamination has been investigated with a high-purity germanium detector and dual ‘gamma + beta’ and ‘alpha’ contamination metre. Radioactive radon (222Rn) and products of its decay were collected by well-known swiping technique. Naturally occurring dust deposited on a plastic surface was collected and the radiation emissions coming from the collected sample were measured and analysed. The main radioactive isotopes contributing to the gamma spectrum were determined. The time behaviour of radon progeny contributing to gamma and alpha activities was investigated and compared with a modelled forecast. The minimal detectable activity when the radon progeny could be determined with a high-purity germanium gamma spectrometer has been established. Also, the minimum activity, measured with a dual contamination metre, has been recognised at which the presence of radon progeny contamination can be determined using gamma spectrometry. A new method is proposed for determining the duration of radon contamination and the time when the contamination occurred. The method is based on the analysis of the relative gamma activities of radon progeny (214Pb and214Bi) measured at different times after the radon contamination.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| 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) | 0.001 | 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".