{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:BNV2JL5NTSU4RJ5P67XQSQETLF","short_pith_number":"pith:BNV2JL5N","canonical_record":{"source":{"id":"2007.08892","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-07-17T10:44:48Z","cross_cats_sorted":[],"title_canon_sha256":"fd463378ac800896447f3db3dfa2a22b15648fe1d1b3ea628d706e4aba5e6594","abstract_canon_sha256":"d79e20a2e66bf638b22c813e1adc1c55b60a4fb5fd6af8cbb619e4bce3b717dc"},"schema_version":"1.0"},"canonical_sha256":"0b6ba4afad9ca9c8a7aff7ef094093594d9fa42b38646fdc524275c84aef1516","source":{"kind":"arxiv","id":"2007.08892","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.08892","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"arxiv_version","alias_value":"2007.08892v1","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.08892","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"pith_short_12","alias_value":"BNV2JL5NTSU4","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"pith_short_16","alias_value":"BNV2JL5NTSU4RJ5P","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"pith_short_8","alias_value":"BNV2JL5N","created_at":"2026-07-05T01:19:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:BNV2JL5NTSU4RJ5P67XQSQETLF","target":"record","payload":{"canonical_record":{"source":{"id":"2007.08892","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-07-17T10:44:48Z","cross_cats_sorted":[],"title_canon_sha256":"fd463378ac800896447f3db3dfa2a22b15648fe1d1b3ea628d706e4aba5e6594","abstract_canon_sha256":"d79e20a2e66bf638b22c813e1adc1c55b60a4fb5fd6af8cbb619e4bce3b717dc"},"schema_version":"1.0"},"canonical_sha256":"0b6ba4afad9ca9c8a7aff7ef094093594d9fa42b38646fdc524275c84aef1516","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:19:58.379886Z","signature_b64":"2CarB0XYGLiVl4D00GLAu2tDlcyRDU1hpx0R0DcE/aQ8VY9SMAI1k/7OUxY5oHzY6baA4mXC5JpZsuYlKDBBBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b6ba4afad9ca9c8a7aff7ef094093594d9fa42b38646fdc524275c84aef1516","last_reissued_at":"2026-07-05T01:19:58.379472Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:19:58.379472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.08892","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":"2026-07-05T01:19:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OzgkaKSFTvJytgx29y5GSggHqHO1bY97UrIacRgPX+hr5hOwkfxRSg5m9NWSSPN0DHuIp3keyjBIHcxxn+52AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T21:38:31.620703Z"},"content_sha256":"b741d1f0e9078eeb359580af5913d7478d84aec45b5da6a923d067013ce54448","schema_version":"1.0","event_id":"sha256:b741d1f0e9078eeb359580af5913d7478d84aec45b5da6a923d067013ce54448"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:BNV2JL5NTSU4RJ5P67XQSQETLF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fluid-structure interaction using volume penalization and mass-spring models with application to flapping bumblebee flight","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Dmitry Kolomenskiy, Hung Truong, Kai Schneider, Thomas Engels","submitted_at":"2020-07-17T10:44:48Z","abstract_excerpt":"Wing flexibility plays an essential role in the aerodynamic performance of insects due to the considerable deformation of their wings during flight under the impact of inertial and aerodynamic forces. These forces come from the complex wing kinematics of insects. In this study, both wing structural dynamics and flapping wing motion are taken into account to investigate the effect of wing deformation on the aerodynamic efficiency of a bumblebee in tethered flight. A fluid-structure interaction solver, coupling a mass-spring model for the flexible wing with a pseudo-spectral code solving the inc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.08892","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2007.08892/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:19:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ThDd8gP+7FpZeYWyzZUMOTAY2wsU5uv6pW3YgrlPrRUh4JqWkQmwhE/SVjpKx5rBa2Nq3EdF5DbPjoJiJnXnDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T21:38:31.621266Z"},"content_sha256":"49fdbd9295e5db7d909b82d94964215ee261078568de482de2d3ff50919546ef","schema_version":"1.0","event_id":"sha256:49fdbd9295e5db7d909b82d94964215ee261078568de482de2d3ff50919546ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BNV2JL5NTSU4RJ5P67XQSQETLF/bundle.json","state_url":"https://pith.science/pith/BNV2JL5NTSU4RJ5P67XQSQETLF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BNV2JL5NTSU4RJ5P67XQSQETLF/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":"2026-08-21T21:38:31Z","links":{"resolver":"https://pith.science/pith/BNV2JL5NTSU4RJ5P67XQSQETLF","bundle":"https://pith.science/pith/BNV2JL5NTSU4RJ5P67XQSQETLF/bundle.json","state":"https://pith.science/pith/BNV2JL5NTSU4RJ5P67XQSQETLF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BNV2JL5NTSU4RJ5P67XQSQETLF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:BNV2JL5NTSU4RJ5P67XQSQETLF","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":"d79e20a2e66bf638b22c813e1adc1c55b60a4fb5fd6af8cbb619e4bce3b717dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-07-17T10:44:48Z","title_canon_sha256":"fd463378ac800896447f3db3dfa2a22b15648fe1d1b3ea628d706e4aba5e6594"},"schema_version":"1.0","source":{"id":"2007.08892","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.08892","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"arxiv_version","alias_value":"2007.08892v1","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.08892","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"pith_short_12","alias_value":"BNV2JL5NTSU4","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"pith_short_16","alias_value":"BNV2JL5NTSU4RJ5P","created_at":"2026-07-05T01:19:58Z"},{"alias_kind":"pith_short_8","alias_value":"BNV2JL5N","created_at":"2026-07-05T01:19:58Z"}],"graph_snapshots":[{"event_id":"sha256:49fdbd9295e5db7d909b82d94964215ee261078568de482de2d3ff50919546ef","target":"graph","created_at":"2026-07-05T01:19:58Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2007.08892/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Wing flexibility plays an essential role in the aerodynamic performance of insects due to the considerable deformation of their wings during flight under the impact of inertial and aerodynamic forces. These forces come from the complex wing kinematics of insects. In this study, both wing structural dynamics and flapping wing motion are taken into account to investigate the effect of wing deformation on the aerodynamic efficiency of a bumblebee in tethered flight. A fluid-structure interaction solver, coupling a mass-spring model for the flexible wing with a pseudo-spectral code solving the inc","authors_text":"Dmitry Kolomenskiy, Hung Truong, Kai Schneider, Thomas Engels","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-07-17T10:44:48Z","title":"Fluid-structure interaction using volume penalization and mass-spring models with application to flapping bumblebee flight"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.08892","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:b741d1f0e9078eeb359580af5913d7478d84aec45b5da6a923d067013ce54448","target":"record","created_at":"2026-07-05T01:19:58Z","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":"d79e20a2e66bf638b22c813e1adc1c55b60a4fb5fd6af8cbb619e4bce3b717dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2020-07-17T10:44:48Z","title_canon_sha256":"fd463378ac800896447f3db3dfa2a22b15648fe1d1b3ea628d706e4aba5e6594"},"schema_version":"1.0","source":{"id":"2007.08892","kind":"arxiv","version":1}},"canonical_sha256":"0b6ba4afad9ca9c8a7aff7ef094093594d9fa42b38646fdc524275c84aef1516","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0b6ba4afad9ca9c8a7aff7ef094093594d9fa42b38646fdc524275c84aef1516","first_computed_at":"2026-07-05T01:19:58.379472Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:19:58.379472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2CarB0XYGLiVl4D00GLAu2tDlcyRDU1hpx0R0DcE/aQ8VY9SMAI1k/7OUxY5oHzY6baA4mXC5JpZsuYlKDBBBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:19:58.379886Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.08892","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b741d1f0e9078eeb359580af5913d7478d84aec45b5da6a923d067013ce54448","sha256:49fdbd9295e5db7d909b82d94964215ee261078568de482de2d3ff50919546ef"],"state_sha256":"92533043f7f14f08c08f75417bfa3dfdd9ceabe1a9216f444f11c8409497c44f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KcNUP/3R418cMT8lqGpYgcycPpDPVRmppFRkWAh6SRVUr3fHXmygWN3jF9P0OqMJqRIoPhHkA0xL5M99AgqBCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T21:38:31.626332Z","bundle_sha256":"ccbec97aadeccc0e9b8212b198c60482887f8fd34ab57d09122246a9d4386be9"}}