Notice bibliographique
Résumé
Radon, one of the pollution sources of indoor air, is colorless, odorless, and tasteless noble gas, and is easily inhaled by humans, causing them lung cancer. The purpose of this study is to examine an amount of radon emission from gypsum boards among indoor building materials, and analyze indoor radon concentration through ventilation, which is another control method. Although it is known that 80-90% of radon flows into indoors through soil, it was also identified at high-rise apartment floors. This is judged to be resulted by building materials, and among them, gypsum board is being pointed out as the main cause. The standard of radon concentration is 148Bq/㎥ in America and Korea and 200Bq/㎥ in Canada, and Sweden is applying stricter standard to new houses (200Bq/㎥) than existing houses (400Bq/㎥). There are five gypsum board plants in Korea, Daejuk, Yeochoen, Daesan, Yeosu, and Ulsan, and gypsum boards that had been produced by each plant since 2014 were collected and then an amount of radon emission of one week was examined. As a result, max. 20Bq/㎥ was recorded, which is lower than the average indoor radon concentration, 48Bq/㎥. In addition, because an amount of radon emission from gypsum board produced in 2010 was confirmed to be 215Bq/㎥, it seems that phospho-gypsum board was converted to desulfurized gypsum board only lately, being applied by QC (Quality Control). Thus, it is needed to find out ways to control radon, ventilation or remodeling, for existing buildings, although gypsum boards of recently constructed buildings could be free from radon. For a basic way to control indoor radon spreading, ventilation should be done. For the experiment, gypsum board that produces a large amount of radon was put in a self-produced acrylic vessel, and ventilation was applied by blowing wind to it using a DC fan, and the change of an amount of radon contained in the vessel was observed. When the amount of radon 168Bq/㎥ was constantly applied by ventilation (once, wind speed 0.12m/s), it was reduced down to 16Bq/㎥ 4 days later, and when the amount of radon 303Bq/㎥ was constantly applied by ventilation (three times, wind speed 0.36m/s), it was reduced down to 30Bq/㎥ 4 days later. It is judged to be a satisfactory level because it is between 15Bq/㎥, outdoor average radon concentration, and 48Bq/㎥, indoor average radon concentration.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,001 | 0,001 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,007 | 0,003 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».