Directivity patterns for a short line array of barrel-stave flextensional transducers
Bibliographic record
Abstract
The directivity patterns of short line array of barrel-stave flextensional transducers, was investigated. The four-element line array of 1.3 m with a 40 cm inter-element spacing was used with amplifiers for driving each transducers. A four-channel Wavetek 650 synthesizer was used to apply phase and time delays. The directivity patterns of transducers were measured using a rotating station at a water depth of 30.5 m using the radiation patterns produced by driving the two center elements 180° out of phase. It was observed that the cardioid patterns were produced using same two center elements by driving 96°out of phase at 800 Hz while solid curve type radiation patterns were obtained on driving all four elements in phase at 1640 Hz. Result shows that an omnidirectional pattern can be created by exciting a single elements while cardioid and dipole-like patterns can be obtained from driving two elements out of phase.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".