{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:B5FOIJIMB6PJPRNW4YQR6SUDOC","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":"c6d6c756cd32dec5b5e02c6c9fba00d7c37c4d783d0b6a370c35c8ab4126f8a7","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-05-04T21:09:36Z","title_canon_sha256":"e22e0593853f928fc607fa6f9cba9d762619d8c1a46460455d277b47caafeefa"},"schema_version":"1.0","source":{"id":"1805.01938","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01938","created_at":"2026-05-18T00:16:41Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01938v1","created_at":"2026-05-18T00:16:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01938","created_at":"2026-05-18T00:16:41Z"},{"alias_kind":"pith_short_12","alias_value":"B5FOIJIMB6PJ","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"B5FOIJIMB6PJPRNW","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"B5FOIJIM","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:5c6eb8d9443c71b5a0d2b100c1a823ec1f3e688c7325ee57473be5fd4e604e1c","target":"graph","created_at":"2026-05-18T00:16:41Z","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 Betz law places a fundamental limit on the amount of power that can be extracted by a wind turbine for a fixed area wind column. This manuscript extends the original Betz Law derivation to a \"multi-turbine\" approach.","authors_text":"Anna Brockway, Danny Broberg, Deep Shah, Steve Drapcho","cross_cats":[],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-05-04T21:09:36Z","title":"Getting More Out of the Wind: Extending Betz's Law to Multiple Turbines"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01938","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:f833e305923421e061ac37928eb4bd3dd0727b7a71c057ac0f53250055ffd050","target":"record","created_at":"2026-05-18T00:16:41Z","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":"c6d6c756cd32dec5b5e02c6c9fba00d7c37c4d783d0b6a370c35c8ab4126f8a7","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-05-04T21:09:36Z","title_canon_sha256":"e22e0593853f928fc607fa6f9cba9d762619d8c1a46460455d277b47caafeefa"},"schema_version":"1.0","source":{"id":"1805.01938","kind":"arxiv","version":1}},"canonical_sha256":"0f4ae4250c0f9e97c5b6e6211f4a83709334718236c7d485cea0312cfb0a7288","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f4ae4250c0f9e97c5b6e6211f4a83709334718236c7d485cea0312cfb0a7288","first_computed_at":"2026-05-18T00:16:41.514481Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:41.514481Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ooqfoNyJ+bAHGEAK/F768MENLrBbu0qhW9NCbPBOAlg1LDUXaBABQcYacSlENAoN5bJByjV+pUlGcyd0rmBtAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:41.515101Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.01938","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f833e305923421e061ac37928eb4bd3dd0727b7a71c057ac0f53250055ffd050","sha256:5c6eb8d9443c71b5a0d2b100c1a823ec1f3e688c7325ee57473be5fd4e604e1c"],"state_sha256":"bf00460d61592e2b8d9ddfe97694ff938f42ccc87f0442caebb0cfbcdbdda77d"}