Notice bibliographique
Résumé
The Cohasset A-52 drill site of Petro-Canada is situated in 34 M of water approximately 25 kM southwest of Sable Island (lat: 43-51-09N; long:60-37-44W; see fig.1 ). It is located south of West Bar in an area dominated by shoreface-connected ridges. The drill rig Rowan Gorilla was situated on the south flank of such a shoreface ridge during drilling operations of January - March, 1986. The local bed dips at a slope of approximately 3 degrees to the south and is composed of medium - coarse size siliceous sand. Seismic data suggests that this sand ridge has migrated to the south in modern times. Thus the Cohasset site appears to be a region of net=sand infilling. The site is intermittently rippled and Mega-rippled by waves and currents. Sand transport and scouring around the spud cane is considered by the diving observers, Wolf Sub-Ocean Ltd., to be significant. This is thought to be due to winter storm-driven currents and wave Motion. The Geological Survey of Canada was invited by Petra-Canada Ltd. to carry out a joint _study on the transport of sand at the Cohasset site in order to assess seabed erosion and deposition and the conditions under which sand transport takes place, Six (6) storm events were experienced during this study. The Most severe wave conditions of the study were experienced during our arrival at the rig. During the subsequent detection period the most severe conditions experienced were: MAXIMUM SIGNIFICANT WAVE HEIGHT ............ 4.5 M; MAXIMUM MEAN WAVE PERIOD................... 7.2 s; MAXIMUM NEAR BEO CURRENT ................... 0.8 m/s; MAXIMUM WIN ? SPEED ........................ 27 m/s; Sand was seen in suspension, the bed was covered with hummocky megaripples and scouring around the spud cans was taking place at the time of our arrival; that is during the passage of storm 1. Despite the passage of several subsequent storms active suspended sediment transport of sand was detected only under storm 6. The prevailing direction of net sediment transport appears to be to the west. Transport took place predominantly as bedload. Wave and current formed ripples were detected during each of the UFO dives. These appeared to change size and orientation from dive to dive, and illustrated bedload transport of sand under storms 2 - 6. The Majority (90%} of the suspended particulate Matter detected in the sampling program was organic. Diatoms, organic detritus and pellets were suspended by wave motion during the middle four storms of the study: 30 January, 2 February, 5 February and 6 February, 1986. Minor amounts << 107.) of fine-grain sand were sampled throughout the study, but appeared to bear no relationship to wave or current strength. Sand was suspended during storms 1 and 6 which occurred on 29 January and 10 February, 1986. It is concluded that the natural seabed is stable under the storm conditions 2 - 5 observed during this study. It is also concluded that active transport of bottom sediment (Mean diameter - 0.4 MM) took place during the storm 1 (of the 29 January, 1986). Threshold conditions for sand suspension were exceeded during this storm and were barely reached during storm 6. Megaripples are intermittently present. They form and are destroyed within days of the passage of storms.
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 | 0,001 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,002 | 0,002 |
| Études des sciences et des technologies | 0,003 | 0,001 |
| Communication savante | 0,003 | 0,001 |
| Science ouverte | 0,001 | 0,002 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,038 | 0,004 |
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 ».