{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:Q63BE5VS2IOPDPMSGDYQCFTD4E","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0c3056999c1f60e920d2624b315adf03ad11b2e4644c6b9263f320fd750572ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-05-19T02:47:10Z","title_canon_sha256":"c5292cf103de1bc107f34a077bdc4c9ebb696ae68537667e8ad04cad609d9728"},"schema_version":"1.0","source":{"id":"1405.4582","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1405.4582","created_at":"2026-05-18T00:22:53Z"},{"alias_kind":"arxiv_version","alias_value":"1405.4582v1","created_at":"2026-05-18T00:22:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1405.4582","created_at":"2026-05-18T00:22:53Z"},{"alias_kind":"pith_short_12","alias_value":"Q63BE5VS2IOP","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"Q63BE5VS2IOPDPMS","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"Q63BE5VS","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:5a4bf56c74a3bc7e119db8c7da20d884516309b48a186aa58cf6329146943b96","target":"graph","created_at":"2026-05-18T00:22:53Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"An electrical impedance spectroscopy-based nondestructive testing (NDT) method is proposed to image both cracks and reinforcing bars in concrete structures. The method utilizes the frequency-dependent behavior of thin insulating cracks: low-frequency electrical currents are blocked by insulating cracks, whereas high-frequency currents can pass through the conducting bars without being blocked by thin cracks. Rigorous mathematical analysis relates the geometric structures of the cracks and bars to the frequency-dependent Neumann-to-Dirichlet data. Various numerical simulations support the feasi","authors_text":"Habib Ammari, Jin Keun Seo, Liangdong Zhou, Tingting Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-05-19T02:47:10Z","title":"Electrical impedance spectroscopy-based nondestructive testing for imaging defects in concrete structures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.4582","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7fa8ec16e8318660c45aa37b5c020a28a4b17778d8a1f15bbfa69ae07995499a","target":"record","created_at":"2026-05-18T00:22:53Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0c3056999c1f60e920d2624b315adf03ad11b2e4644c6b9263f320fd750572ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"math.AP","submitted_at":"2014-05-19T02:47:10Z","title_canon_sha256":"c5292cf103de1bc107f34a077bdc4c9ebb696ae68537667e8ad04cad609d9728"},"schema_version":"1.0","source":{"id":"1405.4582","kind":"arxiv","version":1}},"canonical_sha256":"87b61276b2d21cf1bd9230f1011663e13c6a5458c1979781a5aacc6a9f5c7f53","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"87b61276b2d21cf1bd9230f1011663e13c6a5458c1979781a5aacc6a9f5c7f53","first_computed_at":"2026-05-18T00:22:53.181367Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:53.181367Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4UrFkV853RqqxkcG3lAnz1ipovggM1FEKeIFZPLF8wnjY2chJMfXtbMBQX39ZVvX9kZzxrgvtzzxUz+YuxXACA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:53.181775Z","signed_message":"canonical_sha256_bytes"},"source_id":"1405.4582","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7fa8ec16e8318660c45aa37b5c020a28a4b17778d8a1f15bbfa69ae07995499a","sha256:5a4bf56c74a3bc7e119db8c7da20d884516309b48a186aa58cf6329146943b96"],"state_sha256":"dd901225d59513521bd421da0b81ea49fadf9c1b59a5ed49de71c15408711530"}