Effects of dehydration-induced structural and material changes on the apparent modulus of cancellous bone
Why this work is in the frame
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Bibliographic record
Abstract
Dehydration is known to cause an increase in the elastic modulus of bone tissue. However, it also causes structural changes (i.e. shrinkage) which can themselves significantly alter the mechanical properties, particularly in cancellous bone. The current study attempts to estimate the contribution of these two competing factors to the net change of dehydration on the apparent modulus of bovine cancellous bone. Cylindrical cores from the lumbar vertebrae were tested in tension, while hydrated and again after dehydration. The bone volume fractions (BV/TV) were measured in both conditions. The results indicate that the average overall increase in the apparent modulus after dehydration is 14±14% (mean±SD), which represents the net effect of a 27% increase in modulus due to increased tissue modulus offset by a modulus decrease of 13% due to reductions in bone volume fraction. These observations underscore the need to consider both structural and material changes when comparing hydrated and dehydrated mechanical behaviour.
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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