Accuracy in the localization of sperm whales resident in the strait of gibraltar using one hydrophone
Bibliographic record
Abstract
The geographical distribution in the Strait of Gibraltar of sperm whales (Physeter macrocephalus) and of four species of dolphins suggests some common foraging territories between the species, and a subsequent share of the water column.A localization method using one hydrophone at an unknown depth has been used here to estimate the foraging depth of sperm whales.The sperm whales tracked in the Main Channel of the Strait of Gibraltar have been found to be hunting at the bottom of the water column.The localization method calls for the use of a large vertical 4-hydrophone array.The accuracy of this method is assessed using random variables.A simple analytic expression the error on the depth of the source is then calculated.The results of the localization method are checked by considering an second sperm whale and a second hydrophone.Three ray propagation models have been compared to study the importance of the heterogeneity of the speed of sound in the localization process. r Es u m EDes etudes visuelles en surface dans le Detroit de Gibraltar montrent que les grands cachalots (Physeter macrocephalus) et plusieurs especes de dauphins partagent leurs territoires de chasse.Une methode de localisation par acoustique passive utilisant un hydrophone une profondeur inconnue a ete utilisee ici, afin d 'estimer la profondeur de chasse des cachalots, et prouver un eventuel partage de la colonne d 'eau entre les differentes especes.Les cachalots poursuivis dans le Detroit de Gibraltar chassent dans la partie inferieure de la colonne d 'eau.La methode de localisation simule l'utilisation d 'un reseau vertical a 4 hydrophones de grande dimension.La precision dans la methode de localisation est estimee l'aide de variables aratoires.Une expression analytique de l'erreur sur la profondeur de la source est donnee.Un second cachalot et un second hydrophone ont ete considers afin de verifier les rsultats de la methode de localisation.Trois modeles de propagation ont ete compares afin d 'etudier l'importance de l'heterogente de la celerite du son dans l'estimation de la position de la source.
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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".