Underwater communications testing of the multi-mode pipe projector
Bibliographic record
Abstract
The functionalities of the multi-mode pipe projector (MMPP) as an underwater communications source, was investigated. The three transducer-equipped GPS buoys with its center frequency set for barrel-stave projector at 1500 Hz, MMPP at 1950 Hz and MMPP at 3850 Hz were deployed at testsite off the west coast of Florida in the Gulf of Mexico. Source levels were kept low so that acoustic emission did not exceed the maxima stated in the cruise plan and GPS NMEA data was encoded on hyperbolic frequency modulated (HFM) sweeps at a rate of 8 symbols per second. A group of type SSQ-53F (GPS) sonobuoys were laid to receive the GPS encoded acoustic signal and subsequently retransmit the data via RF link to CFAV Quest. It was observed that signals were received with high signal to noise ratio including 70 % clear and 26 % highly usable transmissions. Results shows that MMPP can be used in underwater communications as its performance is minimally impacted by multi-path distortion at range of 2km.
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.
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 | 0.001 | 0.002 |
| 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 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".