{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VQFHZ3EQQIZ3PRAIHFBBJ24HCJ","short_pith_number":"pith:VQFHZ3EQ","canonical_record":{"source":{"id":"1807.09199","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-07-24T15:59:32Z","cross_cats_sorted":[],"title_canon_sha256":"29682a4e0737024a2dbe1e521c21b4a1047041bd05046d4a1b60cbec960a1439","abstract_canon_sha256":"475ac658fc4acfef89c4c2ba0b77523a6073a2d8a9aedfd666a4c22a0647c823"},"schema_version":"1.0"},"canonical_sha256":"ac0a7cec908233b7c408394214eb871241180d362741f879764bc6e30d87a00e","source":{"kind":"arxiv","id":"1807.09199","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.09199","created_at":"2026-05-18T00:09:56Z"},{"alias_kind":"arxiv_version","alias_value":"1807.09199v1","created_at":"2026-05-18T00:09:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.09199","created_at":"2026-05-18T00:09:56Z"},{"alias_kind":"pith_short_12","alias_value":"VQFHZ3EQQIZ3","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VQFHZ3EQQIZ3PRAI","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VQFHZ3EQ","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VQFHZ3EQQIZ3PRAIHFBBJ24HCJ","target":"record","payload":{"canonical_record":{"source":{"id":"1807.09199","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-07-24T15:59:32Z","cross_cats_sorted":[],"title_canon_sha256":"29682a4e0737024a2dbe1e521c21b4a1047041bd05046d4a1b60cbec960a1439","abstract_canon_sha256":"475ac658fc4acfef89c4c2ba0b77523a6073a2d8a9aedfd666a4c22a0647c823"},"schema_version":"1.0"},"canonical_sha256":"ac0a7cec908233b7c408394214eb871241180d362741f879764bc6e30d87a00e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:09:56.449812Z","signature_b64":"8FH5I+o1G7yzFfKFLElq9Wak1pW8FSieYX3M3t+C/KaK2Qq5Fsb9rs1hOQC0ODlBXr7RW2fRzvQQoDmrH6ylAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac0a7cec908233b7c408394214eb871241180d362741f879764bc6e30d87a00e","last_reissued_at":"2026-05-18T00:09:56.449163Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:09:56.449163Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.09199","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":"2026-05-18T00:09:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ye51K1A3RQQsy2OTzKc+F0BGykNepQUTao1Mo4hCQqHcW9cjPj/xJxSX68ssJt1ww8gbMdiz82zzbR6GaXDiAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T09:42:39.984835Z"},"content_sha256":"e65b102df7b3deadbfa158f2081bd0090c0827a668cd46c8003d7db89d251be1","schema_version":"1.0","event_id":"sha256:e65b102df7b3deadbfa158f2081bd0090c0827a668cd46c8003d7db89d251be1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VQFHZ3EQQIZ3PRAIHFBBJ24HCJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Bursting and reformation cycle of the laminar separation bubble over a NACA-0012 aerofoil: The dynamics of the flow-field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Eltayeb ElJack, Julio Soria","submitted_at":"2018-07-24T15:59:32Z","abstract_excerpt":"Detailed flow dissection using Dynamic Mode Decomposition (DMD) and Proper Orthogonal Decomposition (POD) is carried out to investigate the dynamics of the flow-field around a NACA-0012 aerofoil at a Reynolds number of $5\\times 10^4$, Mach number of $0.4$, and at various angles of attack around the onset of stall. Three distinct dominant flow modes are identified by the DMD and the POD: 1) a globally oscillating flow mode at a low-frequency (LFO mode 1); 2) a locally oscillating flow mode on the suction surface of the aerofoil at a low-frequency (LFO mode 2); and 3) a locally oscillating flow "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.09199","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":"2026-05-18T00:09:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AykLCVdU6CYHJ84dw0se6MgQ16q5+aWYiLhaGR/l4+T17hRvqXY5xXEVJQHpcjnV27opdUu5HWtpoOCoWr/RBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T09:42:39.985178Z"},"content_sha256":"9a9d4866b8506590783341d438772cc2158a46efeab6e03b3d698e9a8ee7a83e","schema_version":"1.0","event_id":"sha256:9a9d4866b8506590783341d438772cc2158a46efeab6e03b3d698e9a8ee7a83e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQFHZ3EQQIZ3PRAIHFBBJ24HCJ/bundle.json","state_url":"https://pith.science/pith/VQFHZ3EQQIZ3PRAIHFBBJ24HCJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQFHZ3EQQIZ3PRAIHFBBJ24HCJ/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":"2026-06-24T09:42:39Z","links":{"resolver":"https://pith.science/pith/VQFHZ3EQQIZ3PRAIHFBBJ24HCJ","bundle":"https://pith.science/pith/VQFHZ3EQQIZ3PRAIHFBBJ24HCJ/bundle.json","state":"https://pith.science/pith/VQFHZ3EQQIZ3PRAIHFBBJ24HCJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQFHZ3EQQIZ3PRAIHFBBJ24HCJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VQFHZ3EQQIZ3PRAIHFBBJ24HCJ","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":"475ac658fc4acfef89c4c2ba0b77523a6073a2d8a9aedfd666a4c22a0647c823","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-07-24T15:59:32Z","title_canon_sha256":"29682a4e0737024a2dbe1e521c21b4a1047041bd05046d4a1b60cbec960a1439"},"schema_version":"1.0","source":{"id":"1807.09199","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.09199","created_at":"2026-05-18T00:09:56Z"},{"alias_kind":"arxiv_version","alias_value":"1807.09199v1","created_at":"2026-05-18T00:09:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.09199","created_at":"2026-05-18T00:09:56Z"},{"alias_kind":"pith_short_12","alias_value":"VQFHZ3EQQIZ3","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VQFHZ3EQQIZ3PRAI","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VQFHZ3EQ","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:9a9d4866b8506590783341d438772cc2158a46efeab6e03b3d698e9a8ee7a83e","target":"graph","created_at":"2026-05-18T00:09:56Z","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":"Detailed flow dissection using Dynamic Mode Decomposition (DMD) and Proper Orthogonal Decomposition (POD) is carried out to investigate the dynamics of the flow-field around a NACA-0012 aerofoil at a Reynolds number of $5\\times 10^4$, Mach number of $0.4$, and at various angles of attack around the onset of stall. Three distinct dominant flow modes are identified by the DMD and the POD: 1) a globally oscillating flow mode at a low-frequency (LFO mode 1); 2) a locally oscillating flow mode on the suction surface of the aerofoil at a low-frequency (LFO mode 2); and 3) a locally oscillating flow ","authors_text":"Eltayeb ElJack, Julio Soria","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-07-24T15:59:32Z","title":"Bursting and reformation cycle of the laminar separation bubble over a NACA-0012 aerofoil: The dynamics of the flow-field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.09199","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:e65b102df7b3deadbfa158f2081bd0090c0827a668cd46c8003d7db89d251be1","target":"record","created_at":"2026-05-18T00:09:56Z","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":"475ac658fc4acfef89c4c2ba0b77523a6073a2d8a9aedfd666a4c22a0647c823","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-07-24T15:59:32Z","title_canon_sha256":"29682a4e0737024a2dbe1e521c21b4a1047041bd05046d4a1b60cbec960a1439"},"schema_version":"1.0","source":{"id":"1807.09199","kind":"arxiv","version":1}},"canonical_sha256":"ac0a7cec908233b7c408394214eb871241180d362741f879764bc6e30d87a00e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac0a7cec908233b7c408394214eb871241180d362741f879764bc6e30d87a00e","first_computed_at":"2026-05-18T00:09:56.449163Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:56.449163Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8FH5I+o1G7yzFfKFLElq9Wak1pW8FSieYX3M3t+C/KaK2Qq5Fsb9rs1hOQC0ODlBXr7RW2fRzvQQoDmrH6ylAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:56.449812Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.09199","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e65b102df7b3deadbfa158f2081bd0090c0827a668cd46c8003d7db89d251be1","sha256:9a9d4866b8506590783341d438772cc2158a46efeab6e03b3d698e9a8ee7a83e"],"state_sha256":"62404b7cbd5dc795da468a513eaa78456a3159d89285da4b54a96bbb4020645f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+IiMlPoJBN8/0N05H4fG9nrEuOvNGxpJCPToHRHtdXIpbpxVzFMeAGVJnByVhECRQBY++rkuaYcmOEx13X/ICQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T09:42:39.987149Z","bundle_sha256":"b2f3627f546090f0c50958129fc537ffadff7287ccec9cdabc9f0593a25e6821"}}