Pore-gas dynamics in overburden and reclamation soil covers
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Pore-gas dynamics in single-layered and multi-layered soil covers were characterised in a mine cover testing programme for the reclamation of lean oil sand overburden. Pore-gas concentrations of oxygen and carbon dioxide in the upper 1·5 m of soil covers and overburden did not reach the threshold that poses a risk for plant growth. Below 1·5 m in the overburden, however, oxygen dropped to 0% and carbon dioxide rose to >16%. While methane concentrations were typically <1·7%, there was a peak in methane at one sampling location to concentrations >35%. Novel subsurface flux chambers were designed and fabricated to measure directly oxygen ingress through soil covers and carbon dioxide efflux from overburden into soil covers. Oxygen fluxes peaked at 18·0 kg/(m2 a) and carbon dioxide fluxes peaked at 2·3 kg/(m2 a). Soil cover material and placement thickness affected gas flux rates. Diffusive fluxes were calculated from soil gas profiles by estimating diffusion coefficients from position-dependent soil moisture and temperature. Advective fluxes were calculated from pressure gradients and in situ air conductivity. Advection dominated over diffusion in soil covers except for one location that was either a localised zone of microbial activity (hydrocarbon degradation or methane oxidation) or the overburden was coarser textured and responded quickly to barometric pressure fluctuations.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| 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) | 0.000 | 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 it