{"id":"W2769438884","doi":"10.1121/1.5014904","title":"Limitations of a Gaussian Beam Model for low-frequency acoustic propagation under ice","year":2017,"lang":"en","type":"article","venue":"The Journal of the Acoustical Society of America","topic":"Underwater Vehicles and Communication Systems","field":"Engineering","cited_by":0,"is_retracted":false,"has_abstract":true,"ca_institutions":"Defence Research and Development Canada","funders":"","keywords":"Acoustics; Gaussian beam; Reflection (computer programming); Amplitude; Underwater; Underwater acoustics; Beam (structure); Gaussian; Wavenumber; Range (aeronautics); Reflection coefficient; Optics; Geology; Physics; Computer science; Materials science","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0003850784,0.00009421208,0.0002308584,0.00001281866,0.0002907863,0.00002642879,0.0009115989,0.0000549306,0.000002586441],"category_scores_gemma":[0.00007748045,0.00005370571,0.0002722844,0.00006579358,0.0003480392,0.0001327267,0.00007893507,0.00021134,8.043868e-7],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00005272458,"about_ca_system_score_gemma":0.00006540324,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00001902338,"about_ca_topic_score_gemma":0.000002294831,"domain_scores_codex":[0.9990615,0.00004116397,0.0004609617,0.00004513671,0.0002529991,0.000138186],"domain_scores_gemma":[0.998242,0.0003639117,0.0005527742,0.0005354329,0.0002606029,0.00004529474],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"simulation_or_modeling","study_design_gemma":"simulation_or_modeling","study_design_scores_codex":[0.00002723019,0.0000589657,0.00001642627,0.0001391087,0.0001866668,3.073533e-8,0.001701473,0.7652005,0.2282273,0.00003562406,0.001054991,0.003351668],"study_design_scores_gemma":[0.0002796101,0.00007103136,0.0004236311,0.0001207664,0.0002043541,0.000007225947,0.001441481,0.9885613,0.005404965,0.00335268,0.00006431754,0.00006869248],"study_design_candidate":"simulation_or_modeling","study_design_consensus":"simulation_or_modeling","genre_codex":"methods","genre_gemma":"empirical","genre_scores_codex":[0.01780613,0.0001421172,0.9789954,0.002621319,0.00006361052,0.0001903736,0.00001283439,0.0000103666,0.000157829],"genre_scores_gemma":[0.9576992,0.0004157392,0.04161372,0.0001246832,0.00006091633,0.000004999024,5.326166e-7,0.00001731243,0.00006283428],"genre_candidate":"methods","genre_consensus":null,"teacher_disagreement_score":0.9398931,"threshold_uncertainty_score":0.2236522,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0541825047564029,"score_gpt":0.2631952006769402,"score_spread":0.2090126959205373,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}