Acoustic Studies of Liquid-Vapor Critical Behavior of Neon and Helium in Aerogels
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Bibliographic record
Abstract
We have used an acoustic resonator to study the liquid-vapor coexistence curve and critical region of simple fluids (neon and helium) confined in high porosity silica aerogels. A diverging isothermal compressibility at a critical point appears as a sharp minimum in the sound velocity. The low frequencies of the resonator (a few kHz) allow a more direct probe of the fluid compressibility than was possible in previous ultrasonic measurements. We have also made direct density-pressure measurements in aerogels, using a capacitive technique to avoid complications from any bulk fluid present in the experiment. The presence of the aerogel lowers the fluids' critical temperatures and narrows their coexistence curves. We compare our results to those for bulk neon and to previous measurements in aerogels.
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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 | 0.001 | 0.001 |
| 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