Phosphorus Content of Belwood Reservoir Sediment Core
Bibliographic record
Abstract
On February 14, 2018, four sediment cores were obtained from Belwood Lake, an approximately 7-km2 reservoir in the upper Grand River Watershed that was created in 1941 as a result of dam construction.Of these four, one core, , 8.7 cm internal diameter and 47 cm long, was selected for sediment core dating and laboratory analysis. Cores were collected using a Glew hammer-driven gravity corer fitted with a lucite tube and were subsequently transported to the lab, where they were sectioned at 0.5-cm intervals. Sediment samples were sealed in plastic bags and refrigerated at 4℃ until undergoing further analysis. One of the four cores collected (47 cm long), was selected for sediment core dating and laboratory analysis. In the laboratory, sequential loss-on-ignition (LOI) analysis was performed using ~0.5-g subsamples of wet sediment from each core slice, as described previously, to obtain the organic matter and carbonate content. The sediment P content of core slices was determined by IC-OES (Thermo Scientific iCAP 6300) after digestion with potassium persulfate-sulfuric acid . A sediment core chronology was developed based on gamma ray spectrometric determination of 210Pb activity at contiguous 0.5-cm intervals, using previously described methods.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.003 | 0.005 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.012 | 0.009 |
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".