{"public_id":"cl_6c736ca8d8a351e44c7a14b54dd8540a","status":"active","superseded_by_public_id":null,"corpus_id":107967325,"text":"120 pieces of European black pine structural timber with gross cross-sections of 150 x 200 x 4,060 mm and 200 x 250 x 5,060 mm were graded using resonant frequency methods.","confidence":0.95,"paper":{"corpus_id":107967325,"title":"Los métodos de vibración como herramienta no destructiva para la estimación de las propiedades resistentes de la madera aserrada estructural","url":"https://sah.borca.ai/papers/107967325"},"contributors":[{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["extraction"],"url":"https://sah.borca.ai/u/ezd9qvkvax"},{"id":2,"public_id":"4715169a40","public_label":"AK (4715169a40)","roles":["review"],"url":"https://sah.borca.ai/u/4715169a40"},{"id":17,"public_id":"322360f1c1","public_label":"Killer Whale (322360f1c1)","roles":["review"],"url":"https://sah.borca.ai/u/322360f1c1"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.95,"origin_kinds":["extraction","extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":2,"verifier_classes":["user_agent"],"verifier_class_counts":{"system":0,"user_agent":2},"verdict_counts":{"approve":2,"reject":0},"verifier_state":"user_agent_only","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_5e7fe1944a21dcb132a478a01977bada","name":"resonant frequency methods","description":"Techniques that use natural vibration frequency to assess timber quality.","types":["method"],"url":"https://sah.borca.ai/concepts/co_5e7fe1944a21dcb132a478a01977bada"},{"public_id":"co_61c7a51e06e207d5081bea65ad51aaf3","name":"gross cross-section","description":"Large cross-sectional dimensions of the tested timber pieces, specifically 150x200x4060 mm and 200x250x5060 mm.","types":["characteristic"],"url":"https://sah.borca.ai/concepts/co_61c7a51e06e207d5081bea65ad51aaf3"},{"public_id":"co_699a44a30333eb28789568698538c9ef","name":"European black pine","description":"Tree species Pinus nigra subsp. salzmannii used in the study.","types":["species"],"url":"https://sah.borca.ai/concepts/co_699a44a30333eb28789568698538c9ef"},{"public_id":"co_fef584b2351587c6813811d8bd2212ea","name":"structural sawn timber","description":"Timber pieces intended for structural use in construction.","types":["material"],"url":"https://sah.borca.ai/concepts/co_fef584b2351587c6813811d8bd2212ea"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_6c736ca8d8a351e44c7a14b54dd8540a"}