{"id":"W3035172871","doi":"10.1016/j.scitotenv.2020.139992","title":"Historical smelting activities in Eastern Canada revealed by Pb concentrations and isotope ratios in tree rings of long-lived white cedars (Thuja occidentalis L.)","year":2020,"lang":"en","type":"article","venue":"The Science of The Total Environment","topic":"Heavy metals in environment","field":"Environmental Science","cited_by":11,"is_retracted":false,"has_abstract":false,"ca_institutions":"Nexen (Canada); Université du Québec à Montréal","funders":"","keywords":"Smelting; Context (archaeology); Thuja; Contamination; Environmental science; Lead smelting; Environmental chemistry; Dendrochronology; Chemistry; Geography; Archaeology; Ecology; Biology","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0001235423,0.0001852286,0.0001840327,0.00103345,0.001252371,0.0008197274,0.0004496619,0.0002932288,0.0008031249],"category_scores_gemma":[0.0002177243,0.0001876589,0.0001177436,0.0009804579,0.0006478908,0.0002354319,0.0003262507,0.0002575267,0.0001733731],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.004379171,"about_ca_system_score_gemma":0.001893138,"about_ca_topic_candidate":true,"about_ca_topic_consensus":true,"about_ca_topic_score_codex":0.8513807,"about_ca_topic_score_gemma":0.9632856,"domain_scores_codex":[0.9998926,0.00000557196,0.000004528848,0.00003263726,0.00002386823,0.00004078079],"domain_scores_gemma":[0.9995816,0.0000218063,0.00007108334,0.00001299655,0.000192911,0.0001195661],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"observational","study_design_scores_codex":[0.0001923154,0.00004373899,0.9841331,0.00001078228,0.0000528188,0.0001616468,0.0009637328,0.00008522753,0.01037902,0.00006235915,0.0001415134,0.003773715],"study_design_scores_gemma":[7.264678e-7,0.000006581897,0.9992118,0.000001606041,0.000005698472,0.00002651989,0.0004389003,0.00003393851,0.0001385694,0.000006245287,0.0001272837,0.000002048881],"study_design_candidate":"observational","study_design_consensus":"observational","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9993442,0.00009210955,0.00002234461,0.00001107453,0.000001195869,0.000001324202,0.0002152412,0.000001895385,0.0003106602],"genre_scores_gemma":[0.9988101,0.00007638877,0.00004732636,0.00001251484,9.789308e-7,0.000001485403,0.0002874448,0.00000223204,0.0007616138],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.1486193,"threshold_uncertainty_score":0.2989891,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0124886219000045,"score_gpt":0.2010659429751259,"score_spread":0.1885773210751214,"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."}}