{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ARXRDWNLB4FYNVPZ2YUR666JK5","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":"f43003ac4e2138afe73070f3e928216c17b22e28d3aab2c4f6124e6d57062dac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-05-05T18:06:25Z","title_canon_sha256":"6e4c4a86b7853c83aafd4d384ce1ea67e8dafa2acac957531d17321924fa561e"},"schema_version":"1.0","source":{"id":"1505.01101","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.01101","created_at":"2026-05-18T01:17:25Z"},{"alias_kind":"arxiv_version","alias_value":"1505.01101v4","created_at":"2026-05-18T01:17:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.01101","created_at":"2026-05-18T01:17:25Z"},{"alias_kind":"pith_short_12","alias_value":"ARXRDWNLB4FY","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_16","alias_value":"ARXRDWNLB4FYNVPZ","created_at":"2026-05-18T12:29:10Z"},{"alias_kind":"pith_short_8","alias_value":"ARXRDWNL","created_at":"2026-05-18T12:29:10Z"}],"graph_snapshots":[{"event_id":"sha256:6ddf20c16550f7e277169d7361eb9b848b4b942af5189b23ed48505f707e08d9","target":"graph","created_at":"2026-05-18T01:17:25Z","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":"A rigid object of general shape is fixed inside a wind tunnel. The drag force exerted on it by the wind is determined by a new method based on simple basic Physics concepts, provided one has a solver, any solver, for the corresponding dynamic Navier-Stokes equation which determines the wind velocity field around the object. The method is completely general, but here we apply it to the traditional problem of a long cylinder perpendicular to the wind.","authors_text":"Daniel Girardi, P.M.C. de Oliveira, P.V.S. Souza","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-05-05T18:06:25Z","title":"Drag force in wind tunnels: a new method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.01101","kind":"arxiv","version":4},"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":"sha256:488d7fc2947564a9e3f82010b1dbe121f67a5a89829a1b1bacd58bd309c23b45","target":"record","created_at":"2026-05-18T01:17:25Z","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":"f43003ac4e2138afe73070f3e928216c17b22e28d3aab2c4f6124e6d57062dac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-05-05T18:06:25Z","title_canon_sha256":"6e4c4a86b7853c83aafd4d384ce1ea67e8dafa2acac957531d17321924fa561e"},"schema_version":"1.0","source":{"id":"1505.01101","kind":"arxiv","version":4}},"canonical_sha256":"046f11d9ab0f0b86d5f9d6291f7bc9576ab4365958f10e624f118361507653aa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"046f11d9ab0f0b86d5f9d6291f7bc9576ab4365958f10e624f118361507653aa","first_computed_at":"2026-05-18T01:17:25.768414Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:25.768414Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ebus2OByUxm2AL5sOlpE2a9pGeAp1FoWXnXPjyDtsYq0TXL3jql8BjQpx3U/2rEyaczvhPKLL2D6cPf0Eaj+Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:25.769040Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.01101","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:488d7fc2947564a9e3f82010b1dbe121f67a5a89829a1b1bacd58bd309c23b45","sha256:6ddf20c16550f7e277169d7361eb9b848b4b942af5189b23ed48505f707e08d9"],"state_sha256":"8c1fbf48540bb8187c999700efffe701d17f191b2490f0f7c6d8089166e4dbd7"}