{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:GMET5G4FH4E7KTB2RN2ECZYLBH","short_pith_number":"pith:GMET5G4F","canonical_record":{"source":{"id":"2607.12436","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-07-14T07:09:48Z","cross_cats_sorted":["physics.bio-ph","physics.comp-ph"],"title_canon_sha256":"ea952513b95bd747718f5db5ca7101fa01b15175dd22ae8b504ffd289d4cc4ef","abstract_canon_sha256":"77944b3dfe339eeec991d15f9b9d12531af6a2338b5ed2a109b3408b5aa18ee0"},"schema_version":"1.0"},"canonical_sha256":"33093e9b853f09f54c3a8b7441670b09cce40f8f20b8b8ccfdb330217d470880","source":{"kind":"arxiv","id":"2607.12436","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.12436","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"arxiv_version","alias_value":"2607.12436v1","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.12436","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"pith_short_12","alias_value":"GMET5G4FH4E7","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"pith_short_16","alias_value":"GMET5G4FH4E7KTB2","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"pith_short_8","alias_value":"GMET5G4F","created_at":"2026-07-15T01:21:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:GMET5G4FH4E7KTB2RN2ECZYLBH","target":"record","payload":{"canonical_record":{"source":{"id":"2607.12436","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-07-14T07:09:48Z","cross_cats_sorted":["physics.bio-ph","physics.comp-ph"],"title_canon_sha256":"ea952513b95bd747718f5db5ca7101fa01b15175dd22ae8b504ffd289d4cc4ef","abstract_canon_sha256":"77944b3dfe339eeec991d15f9b9d12531af6a2338b5ed2a109b3408b5aa18ee0"},"schema_version":"1.0"},"canonical_sha256":"33093e9b853f09f54c3a8b7441670b09cce40f8f20b8b8ccfdb330217d470880","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-15T01:21:34.894468Z","signature_b64":"YaEj03aQOMNf9cXVgQhS0X+05zACVUTjtQOZjA32QTB7VU0FdyTbuf0jQlUDf/mrfMgdTkNrGt6NxG3iFyc0Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33093e9b853f09f54c3a8b7441670b09cce40f8f20b8b8ccfdb330217d470880","last_reissued_at":"2026-07-15T01:21:34.893650Z","signature_status":"signed_v1","first_computed_at":"2026-07-15T01:21:34.893650Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.12436","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":"2026-07-15T01:21:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"D6tp+xIOaB0Ac9lmllry2y9jmP09w3oHegbfpv+Rhr/WusiMD2bmdvAlrHTc9tLZkjnrLE+Kc4kkfyp0urhUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T06:09:24.131152Z"},"content_sha256":"df031ed4db9b03b817dcf532bf9f9ba2e473c2c81b6a2890e21c9fea8bee0644","schema_version":"1.0","event_id":"sha256:df031ed4db9b03b817dcf532bf9f9ba2e473c2c81b6a2890e21c9fea8bee0644"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:GMET5G4FH4E7KTB2RN2ECZYLBH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Emergent coordination and propulsion of a model spherical ciliate","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["physics.bio-ph","physics.comp-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Eric E Keaveny, Hang Su, Timothy A Westwood","submitted_at":"2026-07-14T07:09:48Z","abstract_excerpt":"A longstanding challenge in biofluid dynamics research is a mechanistic understanding of the coordinated movement of motile cilia and its resulting ability to facilitate fluid transport. In this study, we develop numerical techniques to simultaneously compute the emergent coordination of and propulsion by filamentous model cilia covering the surface of a sphere. To accomplish this, we develop what we refer to as the filament oscillator model, in which each cilium has two dynamic degrees of freedom: a phase variable that maps to a specific shape in a prescribed sequence, and an angle that descr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.12436","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/2607.12436/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":"2026-07-15T01:21:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zcsEI5mHOM44gk3MOAjcSn2LH9nv+nIt0UKQW9NnR1IE0Id53lsK26EAq0NsU2+DXaH7/8swdsiu65qvOaZVAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T06:09:24.132117Z"},"content_sha256":"bf3c20de36fe7171f7af93c9521bb8aa416ab5feef7ee050910f21f8ba2e73a6","schema_version":"1.0","event_id":"sha256:bf3c20de36fe7171f7af93c9521bb8aa416ab5feef7ee050910f21f8ba2e73a6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GMET5G4FH4E7KTB2RN2ECZYLBH/bundle.json","state_url":"https://pith.science/pith/GMET5G4FH4E7KTB2RN2ECZYLBH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GMET5G4FH4E7KTB2RN2ECZYLBH/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":"2026-08-04T06:09:24Z","links":{"resolver":"https://pith.science/pith/GMET5G4FH4E7KTB2RN2ECZYLBH","bundle":"https://pith.science/pith/GMET5G4FH4E7KTB2RN2ECZYLBH/bundle.json","state":"https://pith.science/pith/GMET5G4FH4E7KTB2RN2ECZYLBH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GMET5G4FH4E7KTB2RN2ECZYLBH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:GMET5G4FH4E7KTB2RN2ECZYLBH","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":"77944b3dfe339eeec991d15f9b9d12531af6a2338b5ed2a109b3408b5aa18ee0","cross_cats_sorted":["physics.bio-ph","physics.comp-ph"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-07-14T07:09:48Z","title_canon_sha256":"ea952513b95bd747718f5db5ca7101fa01b15175dd22ae8b504ffd289d4cc4ef"},"schema_version":"1.0","source":{"id":"2607.12436","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.12436","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"arxiv_version","alias_value":"2607.12436v1","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.12436","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"pith_short_12","alias_value":"GMET5G4FH4E7","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"pith_short_16","alias_value":"GMET5G4FH4E7KTB2","created_at":"2026-07-15T01:21:34Z"},{"alias_kind":"pith_short_8","alias_value":"GMET5G4F","created_at":"2026-07-15T01:21:34Z"}],"graph_snapshots":[{"event_id":"sha256:bf3c20de36fe7171f7af93c9521bb8aa416ab5feef7ee050910f21f8ba2e73a6","target":"graph","created_at":"2026-07-15T01:21:34Z","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/2607.12436/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A longstanding challenge in biofluid dynamics research is a mechanistic understanding of the coordinated movement of motile cilia and its resulting ability to facilitate fluid transport. In this study, we develop numerical techniques to simultaneously compute the emergent coordination of and propulsion by filamentous model cilia covering the surface of a sphere. To accomplish this, we develop what we refer to as the filament oscillator model, in which each cilium has two dynamic degrees of freedom: a phase variable that maps to a specific shape in a prescribed sequence, and an angle that descr","authors_text":"Eric E Keaveny, Hang Su, Timothy A Westwood","cross_cats":["physics.bio-ph","physics.comp-ph"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-07-14T07:09:48Z","title":"Emergent coordination and propulsion of a model spherical ciliate"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.12436","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:df031ed4db9b03b817dcf532bf9f9ba2e473c2c81b6a2890e21c9fea8bee0644","target":"record","created_at":"2026-07-15T01:21:34Z","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":"77944b3dfe339eeec991d15f9b9d12531af6a2338b5ed2a109b3408b5aa18ee0","cross_cats_sorted":["physics.bio-ph","physics.comp-ph"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2026-07-14T07:09:48Z","title_canon_sha256":"ea952513b95bd747718f5db5ca7101fa01b15175dd22ae8b504ffd289d4cc4ef"},"schema_version":"1.0","source":{"id":"2607.12436","kind":"arxiv","version":1}},"canonical_sha256":"33093e9b853f09f54c3a8b7441670b09cce40f8f20b8b8ccfdb330217d470880","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33093e9b853f09f54c3a8b7441670b09cce40f8f20b8b8ccfdb330217d470880","first_computed_at":"2026-07-15T01:21:34.893650Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-15T01:21:34.893650Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YaEj03aQOMNf9cXVgQhS0X+05zACVUTjtQOZjA32QTB7VU0FdyTbuf0jQlUDf/mrfMgdTkNrGt6NxG3iFyc0Dg==","signature_status":"signed_v1","signed_at":"2026-07-15T01:21:34.894468Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.12436","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df031ed4db9b03b817dcf532bf9f9ba2e473c2c81b6a2890e21c9fea8bee0644","sha256:bf3c20de36fe7171f7af93c9521bb8aa416ab5feef7ee050910f21f8ba2e73a6"],"state_sha256":"33d69bbde81ebc628c0399e908208d3f907db86a3fde14e9c2b88fb8cee69d67"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C8PYdwFoSTIcALqwXkhBmvho+K4OaPeaMa6hEMeYsAq7SAo/FSP69cpnCGJJI+FmjW7iitowDFR9FnQ5+GRmDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T06:09:24.191877Z","bundle_sha256":"8e10de7855bb643077cea234cccfc5ee524f4d81e6a4fbe389c51553a80ee934"}}