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Record W7047713042

High-speed imaging of ice-on-ice crushing

2013· article· en· W7047713042 on OpenAlex

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.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.
venuePublished in a venue whose home country is Canada.

Bibliographic record

VenueNPARC · 2013
Typearticle
Languageen
FieldEngineering
TopicPhotocathodes and Microchannel Plates
Canadian institutionsNewfoundland and Labrador Centre for Applied Health Research
Fundersnot available
KeywordsMonocrystalline siliconSpallPyramid (geometry)CrystalliteLoad cell
DOInot available

Abstract

fetched live from OpenAlex

High-speed imaging (15,000 images/s) has been used to observe the behavior of truncated- pyramid freshwater ice samples crushing against an initially-flat freshwater ice ‘platen’ at –10oC at a rate of 20 mm/s. For most tests a polycrystalline sample was crushed against a monocrystalline platen. Two tests involved the cases where both the pyramid sample and platen were monocrystalline and where they were both polycrystalline. The ice behavior was viewed through the ice platen. Remarkably the behavior of the ice in all cases resembled that of prior tests where ice pyramids were crushed against rigid steel and acrylic platens and where observations included spalling, high-pressure zones and low-pressure zones. Spalling rates for the polycrystalline sample tests were significantly influenced by the resonant frequency of the ice-apparatus system, ~ 350 Hz, and the load records showed several extended segments of lock-in at that frequency. This implies that the spalling rates were generally in the vicinity of the resonant frequency of the system and this lead, at times, to the rates adjusting to match the system resonant frequency. While small elastic oscillations of the ice-apparatus system were evident in the sawtooth load record for the monocrystalline ice sample test these did not result in lock-in since the spalling rate was much lower than the polycrystalline case and much more stress built up in the system between spalling events, that is, the load sawteeth had much higher amplitudes and longer periods. The difference in behavior of the monocrystalline and polycrystalline ice can be attributed to the presence of grain boundaries and the random c-axis orientations of the grains, where both promote spalling fractures. Adhesive effects, due to rapid refreezing of liquid produced during crushing, were also observed in the load records at the ends of the tests where load went negative briefly as the crushed ice pyramid was pulled away from the ice platen.

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 imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.092
Threshold uncertainty score0.457

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

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.

Opus teacher head0.009
GPT teacher head0.203
Teacher spread0.195 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it