Can dynamic recrystallization and bulk pressure melting explain characteristics of ice crushing?
Bibliographic record
Abstract
Dynamic Recrystallization and bulk pressure melting, accompanied by extensive microcracking, in localized zones of high pressure, have been put forward by some researchers (Jordaan, 2001; Jordaan et al., 1999) as the dominant mechanisms governing the behavior of ice during impact and indentation. This paper outlines the fundamental physics of ice recrystallization and pressure melting and then examines the viability of the proposed ice crushing model in the context of existing lab and field data. Questions arise when the time dependent aspects of recrystallization and heat conduction are considered in view of the high strain rates typically imposed on ice during impacts and indentation. The model exhibits incompatibilities with detailed in situ pressure and temperature measurements and simultaneous visual data over a wide range of scales. Similarly, the model does not adequately explain the relative displacement measurements of ice and indentors. Thin sections of indented natural ice and large flaw-free single crystals are discussed in association with these conclusions.
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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 | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.003 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".