{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:PKGNSSKEJ2XKFZTW6WMUZAAZE4","short_pith_number":"pith:PKGNSSKE","canonical_record":{"source":{"id":"1207.4002","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-07-17T14:21:38Z","cross_cats_sorted":[],"title_canon_sha256":"afb474407cdd16239dc8ed1bef7502c08325581370a5fda4b547937424c9220f","abstract_canon_sha256":"9ccfabdbf20ccd7f1316b679aceee49174406c80f3530c85d30d3bbe1ac40e7e"},"schema_version":"1.0"},"canonical_sha256":"7a8cd949444eaea2e676f5994c8019270eff4e93914b4d22cbbcd05b7c36eb2d","source":{"kind":"arxiv","id":"1207.4002","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.4002","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"arxiv_version","alias_value":"1207.4002v1","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.4002","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"pith_short_12","alias_value":"PKGNSSKEJ2XK","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"PKGNSSKEJ2XKFZTW","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"PKGNSSKE","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:PKGNSSKEJ2XKFZTW6WMUZAAZE4","target":"record","payload":{"canonical_record":{"source":{"id":"1207.4002","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-07-17T14:21:38Z","cross_cats_sorted":[],"title_canon_sha256":"afb474407cdd16239dc8ed1bef7502c08325581370a5fda4b547937424c9220f","abstract_canon_sha256":"9ccfabdbf20ccd7f1316b679aceee49174406c80f3530c85d30d3bbe1ac40e7e"},"schema_version":"1.0"},"canonical_sha256":"7a8cd949444eaea2e676f5994c8019270eff4e93914b4d22cbbcd05b7c36eb2d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:56:17.480009Z","signature_b64":"3Z61WigHQKQETnOd5V8OYF76ruz4BgTPlgPiHr7vw6Synt9cINatkFafy6x29i4H0ukR4lGZTSZODSolOHeXAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a8cd949444eaea2e676f5994c8019270eff4e93914b4d22cbbcd05b7c36eb2d","last_reissued_at":"2026-05-18T01:56:17.479406Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:56:17.479406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1207.4002","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:56:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bhqm+UhXl2US+ynTCg0fQPpY/IbwwD8OGMpF2e3xoohSf8zz6xwvO//63gCpM0XMkFhC6rEymwjEPN0zxaVXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T12:26:47.000082Z"},"content_sha256":"5bfd1e5ed2bd0b5e5de80c53b3ee8d88eb670725bd7e46ac03fbdc906137f908","schema_version":"1.0","event_id":"sha256:5bfd1e5ed2bd0b5e5de80c53b3ee8d88eb670725bd7e46ac03fbdc906137f908"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:PKGNSSKEJ2XKFZTW6WMUZAAZE4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Validation of Advanced EM Models for UXO Discrimination","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.class-ph","authors_text":"Peter B. Weichman","submitted_at":"2012-07-17T14:21:38Z","abstract_excerpt":"The work reported here details basic validation of our advanced physics-based EMI forward and inverse models against data collected by the NRL TEMTADS system. The data was collected under laboratory-type conditions using both artificial spheroidal targets and real UXO. The artificial target models are essentially exact, and enable detailed comparison of theory and data in support of measurement platform characterization and target identification. Real UXO targets cannot be treated exactly, but it is demonstrated that quantitative comparisons of the data with the spheroid models nevertheless ai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.4002","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:56:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eSCShjvXrWVLz9IEm3+fCwnTX4S1SIppqbLK5ZruoD6nPYKESDJVp3eGILVpNyd6nUDGxvwg4UNj5suYf+bjBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T12:26:47.000742Z"},"content_sha256":"520483ed6e61cf0cce61332820a18f1e689bcef7c3034dacc8e1e976d57f59a2","schema_version":"1.0","event_id":"sha256:520483ed6e61cf0cce61332820a18f1e689bcef7c3034dacc8e1e976d57f59a2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PKGNSSKEJ2XKFZTW6WMUZAAZE4/bundle.json","state_url":"https://pith.science/pith/PKGNSSKEJ2XKFZTW6WMUZAAZE4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PKGNSSKEJ2XKFZTW6WMUZAAZE4/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T12:26:47Z","links":{"resolver":"https://pith.science/pith/PKGNSSKEJ2XKFZTW6WMUZAAZE4","bundle":"https://pith.science/pith/PKGNSSKEJ2XKFZTW6WMUZAAZE4/bundle.json","state":"https://pith.science/pith/PKGNSSKEJ2XKFZTW6WMUZAAZE4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PKGNSSKEJ2XKFZTW6WMUZAAZE4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:PKGNSSKEJ2XKFZTW6WMUZAAZE4","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":"9ccfabdbf20ccd7f1316b679aceee49174406c80f3530c85d30d3bbe1ac40e7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-07-17T14:21:38Z","title_canon_sha256":"afb474407cdd16239dc8ed1bef7502c08325581370a5fda4b547937424c9220f"},"schema_version":"1.0","source":{"id":"1207.4002","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.4002","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"arxiv_version","alias_value":"1207.4002v1","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.4002","created_at":"2026-05-18T01:56:17Z"},{"alias_kind":"pith_short_12","alias_value":"PKGNSSKEJ2XK","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"PKGNSSKEJ2XKFZTW","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"PKGNSSKE","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:520483ed6e61cf0cce61332820a18f1e689bcef7c3034dacc8e1e976d57f59a2","target":"graph","created_at":"2026-05-18T01:56:17Z","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":"The work reported here details basic validation of our advanced physics-based EMI forward and inverse models against data collected by the NRL TEMTADS system. The data was collected under laboratory-type conditions using both artificial spheroidal targets and real UXO. The artificial target models are essentially exact, and enable detailed comparison of theory and data in support of measurement platform characterization and target identification. Real UXO targets cannot be treated exactly, but it is demonstrated that quantitative comparisons of the data with the spheroid models nevertheless ai","authors_text":"Peter B. Weichman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-07-17T14:21:38Z","title":"Validation of Advanced EM Models for UXO Discrimination"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.4002","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":"sha256:5bfd1e5ed2bd0b5e5de80c53b3ee8d88eb670725bd7e46ac03fbdc906137f908","target":"record","created_at":"2026-05-18T01:56:17Z","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":"9ccfabdbf20ccd7f1316b679aceee49174406c80f3530c85d30d3bbe1ac40e7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.class-ph","submitted_at":"2012-07-17T14:21:38Z","title_canon_sha256":"afb474407cdd16239dc8ed1bef7502c08325581370a5fda4b547937424c9220f"},"schema_version":"1.0","source":{"id":"1207.4002","kind":"arxiv","version":1}},"canonical_sha256":"7a8cd949444eaea2e676f5994c8019270eff4e93914b4d22cbbcd05b7c36eb2d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a8cd949444eaea2e676f5994c8019270eff4e93914b4d22cbbcd05b7c36eb2d","first_computed_at":"2026-05-18T01:56:17.479406Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:17.479406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3Z61WigHQKQETnOd5V8OYF76ruz4BgTPlgPiHr7vw6Synt9cINatkFafy6x29i4H0ukR4lGZTSZODSolOHeXAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:17.480009Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.4002","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5bfd1e5ed2bd0b5e5de80c53b3ee8d88eb670725bd7e46ac03fbdc906137f908","sha256:520483ed6e61cf0cce61332820a18f1e689bcef7c3034dacc8e1e976d57f59a2"],"state_sha256":"60c04f18afc4d7e29d7f5e7af9199f26a2c4d0eab4a7debb421e6276a5864eb8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TPUuavRgsca/xoazbzddXr+d7zlC9mVrhlDkwga24XU3kOy8s0LdLWjHRwSGf+Qq44u9DOlAtwtHriIwqnr8CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T12:26:47.004083Z","bundle_sha256":"b2ce04684ad28aefe603426a6696948ba6092692b0f13ca9df04cfcc3c659352"}}