{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:AJLKKDPPO4PQQTH2K7UBM6IRJD","short_pith_number":"pith:AJLKKDPP","canonical_record":{"source":{"id":"1803.11037","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-03-29T12:54:15Z","cross_cats_sorted":[],"title_canon_sha256":"f24305ce4780a58131e1e252a7a1fa0c395c89054127685d339689c28884ae65","abstract_canon_sha256":"550bebc5daf8bcd232600c0fae2ecf2fa71ae8bbfa617a81b0ae8d3d8b6c9e4b"},"schema_version":"1.0"},"canonical_sha256":"0256a50def771f084cfa57e816791148cf4f970de6895e139a3a2af6520f91be","source":{"kind":"arxiv","id":"1803.11037","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.11037","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"arxiv_version","alias_value":"1803.11037v4","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.11037","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"pith_short_12","alias_value":"AJLKKDPPO4PQ","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AJLKKDPPO4PQQTH2","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AJLKKDPP","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:AJLKKDPPO4PQQTH2K7UBM6IRJD","target":"record","payload":{"canonical_record":{"source":{"id":"1803.11037","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-03-29T12:54:15Z","cross_cats_sorted":[],"title_canon_sha256":"f24305ce4780a58131e1e252a7a1fa0c395c89054127685d339689c28884ae65","abstract_canon_sha256":"550bebc5daf8bcd232600c0fae2ecf2fa71ae8bbfa617a81b0ae8d3d8b6c9e4b"},"schema_version":"1.0"},"canonical_sha256":"0256a50def771f084cfa57e816791148cf4f970de6895e139a3a2af6520f91be","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:30.769466Z","signature_b64":"kjwZS8ravbjOa+6KzZAwBf0r7CEy/3oo6L5xlcKHs4g3Ok6+CEVETQbBg5TwGc4J7MCqGLvvvy+X2aPcIIVYAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0256a50def771f084cfa57e816791148cf4f970de6895e139a3a2af6520f91be","last_reissued_at":"2026-05-17T23:42:30.768910Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:30.768910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.11037","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:42:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7AmahHnd9KJXR15S5Y51rN37AO7BNqLrd1M3ga38R1mZseOBMSsJWfs5QFdDZ/BpBzMw/Ki3MA4CWBs1RMGnAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:53:26.047488Z"},"content_sha256":"6bf69b76e7357e4e1146b4a1c552abf06ab6e44029c42e7142acf579e738face","schema_version":"1.0","event_id":"sha256:6bf69b76e7357e4e1146b4a1c552abf06ab6e44029c42e7142acf579e738face"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:AJLKKDPPO4PQQTH2K7UBM6IRJD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Second harmonic generation and vortex shedding by a dipole-quadrupole and a quadrupole-octupole swimmer in a viscous incompressible fluid","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"B. U. Felderhof, R. B. Jones","submitted_at":"2018-03-29T12:54:15Z","abstract_excerpt":"Vortex shedding by a swimming sphere in a viscous incompressible fluid is studied for surface modulation characterized by a superposition of dipolar and quadrupolar, as well as for quadrupolar and octupolar displacements, varying harmonically in time. The time-dependent swimming velocity and the flow velocity are calculated to second order in the amplitude of surface modulation for both models. The models are also useful for the discussion of bird flight."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.11037","kind":"arxiv","version":4},"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":"2026-05-17T23:42:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tZMyMdE8LGHc1FNAfuXnfxh1F7OwhL1uyai4n3gV4oc2NlENmZnqlAHi+RfdrYWEKiDrynW2nppbCYZSNQfoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-26T15:53:26.047832Z"},"content_sha256":"26dccaf9d13f1491c86bffe6242548a2ad67b8be6f778518c06c9ca9935cb165","schema_version":"1.0","event_id":"sha256:26dccaf9d13f1491c86bffe6242548a2ad67b8be6f778518c06c9ca9935cb165"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AJLKKDPPO4PQQTH2K7UBM6IRJD/bundle.json","state_url":"https://pith.science/pith/AJLKKDPPO4PQQTH2K7UBM6IRJD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AJLKKDPPO4PQQTH2K7UBM6IRJD/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":"2026-06-26T15:53:26Z","links":{"resolver":"https://pith.science/pith/AJLKKDPPO4PQQTH2K7UBM6IRJD","bundle":"https://pith.science/pith/AJLKKDPPO4PQQTH2K7UBM6IRJD/bundle.json","state":"https://pith.science/pith/AJLKKDPPO4PQQTH2K7UBM6IRJD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AJLKKDPPO4PQQTH2K7UBM6IRJD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AJLKKDPPO4PQQTH2K7UBM6IRJD","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":"550bebc5daf8bcd232600c0fae2ecf2fa71ae8bbfa617a81b0ae8d3d8b6c9e4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-03-29T12:54:15Z","title_canon_sha256":"f24305ce4780a58131e1e252a7a1fa0c395c89054127685d339689c28884ae65"},"schema_version":"1.0","source":{"id":"1803.11037","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.11037","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"arxiv_version","alias_value":"1803.11037v4","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.11037","created_at":"2026-05-17T23:42:30Z"},{"alias_kind":"pith_short_12","alias_value":"AJLKKDPPO4PQ","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AJLKKDPPO4PQQTH2","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AJLKKDPP","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:26dccaf9d13f1491c86bffe6242548a2ad67b8be6f778518c06c9ca9935cb165","target":"graph","created_at":"2026-05-17T23:42:30Z","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":"Vortex shedding by a swimming sphere in a viscous incompressible fluid is studied for surface modulation characterized by a superposition of dipolar and quadrupolar, as well as for quadrupolar and octupolar displacements, varying harmonically in time. The time-dependent swimming velocity and the flow velocity are calculated to second order in the amplitude of surface modulation for both models. The models are also useful for the discussion of bird flight.","authors_text":"B. U. Felderhof, R. B. Jones","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-03-29T12:54:15Z","title":"Second harmonic generation and vortex shedding by a dipole-quadrupole and a quadrupole-octupole swimmer in a viscous incompressible fluid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.11037","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":"sha256:6bf69b76e7357e4e1146b4a1c552abf06ab6e44029c42e7142acf579e738face","target":"record","created_at":"2026-05-17T23:42:30Z","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":"550bebc5daf8bcd232600c0fae2ecf2fa71ae8bbfa617a81b0ae8d3d8b6c9e4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2018-03-29T12:54:15Z","title_canon_sha256":"f24305ce4780a58131e1e252a7a1fa0c395c89054127685d339689c28884ae65"},"schema_version":"1.0","source":{"id":"1803.11037","kind":"arxiv","version":4}},"canonical_sha256":"0256a50def771f084cfa57e816791148cf4f970de6895e139a3a2af6520f91be","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0256a50def771f084cfa57e816791148cf4f970de6895e139a3a2af6520f91be","first_computed_at":"2026-05-17T23:42:30.768910Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:30.768910Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kjwZS8ravbjOa+6KzZAwBf0r7CEy/3oo6L5xlcKHs4g3Ok6+CEVETQbBg5TwGc4J7MCqGLvvvy+X2aPcIIVYAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:30.769466Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.11037","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6bf69b76e7357e4e1146b4a1c552abf06ab6e44029c42e7142acf579e738face","sha256:26dccaf9d13f1491c86bffe6242548a2ad67b8be6f778518c06c9ca9935cb165"],"state_sha256":"5fa2b55f6e257d66e7a0091802f90414eaf9c7937086bf15a49fa75648dfcaf9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r8xQFbynk5dl9PJF95FTty2r7xnkdL8gJXjQCu/LYVT4WYAWFVXpmcEw1HyxCUsvokhuBEnt3u2pc0sOzQgtDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-26T15:53:26.049710Z","bundle_sha256":"ce40b387930ef689f051fc2d111c561a143535a99ec392c390b936436c5cdd83"}}