{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:PXR7IIPBDVNG2SCMSUCH5H2IGO","short_pith_number":"pith:PXR7IIPB","canonical_record":{"source":{"id":"1306.4423","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2013-06-19T05:00:19Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"63c387b8084a4e9ad0e57355796639559fccae1bbcb7b0c043a92ff5ee59f04c","abstract_canon_sha256":"421e013ccd05a827120721d18f2b4cf12e23dab099f267cce4c73166c414310c"},"schema_version":"1.0"},"canonical_sha256":"7de3f421e11d5a6d484c95047e9f4833bab20db9cc07a71001596142b6f3fb7b","source":{"kind":"arxiv","id":"1306.4423","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.4423","created_at":"2026-05-17T23:56:10Z"},{"alias_kind":"arxiv_version","alias_value":"1306.4423v1","created_at":"2026-05-17T23:56:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.4423","created_at":"2026-05-17T23:56:10Z"},{"alias_kind":"pith_short_12","alias_value":"PXR7IIPBDVNG","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"PXR7IIPBDVNG2SCM","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"PXR7IIPB","created_at":"2026-05-18T12:27:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:PXR7IIPBDVNG2SCMSUCH5H2IGO","target":"record","payload":{"canonical_record":{"source":{"id":"1306.4423","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2013-06-19T05:00:19Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"63c387b8084a4e9ad0e57355796639559fccae1bbcb7b0c043a92ff5ee59f04c","abstract_canon_sha256":"421e013ccd05a827120721d18f2b4cf12e23dab099f267cce4c73166c414310c"},"schema_version":"1.0"},"canonical_sha256":"7de3f421e11d5a6d484c95047e9f4833bab20db9cc07a71001596142b6f3fb7b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:10.838941Z","signature_b64":"zmGyqZ4NPongjeTi9iqeu3cPMKD5xH8OUBFwsdUrDoqJ99ATeT80oIIuyMPfca4nfV5D0tsBy2WukcmLwBbTBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7de3f421e11d5a6d484c95047e9f4833bab20db9cc07a71001596142b6f3fb7b","last_reissued_at":"2026-05-17T23:56:10.838187Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:10.838187Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.4423","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":"2026-05-17T23:56:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+nQgRZRdrfwaZ8E2RDKcqSX4zW/EisnoT8eiFagFjV3Qy7/pPYpIhdNrsB8zS0p97US0RelnOCz/SvB6J61kDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:36:49.631477Z"},"content_sha256":"8185327ba88d8c9454db2506890432dab8f8d53504efa6d31d68e4b1cf530a52","schema_version":"1.0","event_id":"sha256:8185327ba88d8c9454db2506890432dab8f8d53504efa6d31d68e4b1cf530a52"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:PXR7IIPBDVNG2SCMSUCH5H2IGO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nematode Locomotion in Unconfined and Confined Fluids","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Alejandro Bilbao, Eligiusz Wajnryb, Jerzy Blawzdziewicz, Siva Vanapalli","submitted_at":"2013-06-19T05:00:19Z","abstract_excerpt":"The millimeter-long soil-dwelling nematode {\\it C. elegans} propels itself by producing undulations that propagate along its body and turns by assuming highly curved shapes. According to our recent study [PLoS ONE \\textbf{7}, e40121 (2012)] all these postures can be accurately described by a piecewise-harmonic-curvature (PHC) model. We combine this curvature-based description with highly accurate hydrodynamic bead models to evaluate the normalized velocity and turning angles for a worm swimming in an unconfined fluid and in a parallel-wall cell. We find that the worm moves twice as fast and na"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.4423","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":"2026-05-17T23:56:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k/CIwOofvQ9lS53/uwC8SDDsFzIN02EmuBra9mjL5jQ8TqZ7j+w4x32umkg0K01T8HCJseGpynm2PWAjQoztDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T20:36:49.631834Z"},"content_sha256":"1babc56b8a48dd68fe64c1b84ce0ddb983fcbbca45c0ccfb2e9c5bb6ebbe4773","schema_version":"1.0","event_id":"sha256:1babc56b8a48dd68fe64c1b84ce0ddb983fcbbca45c0ccfb2e9c5bb6ebbe4773"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PXR7IIPBDVNG2SCMSUCH5H2IGO/bundle.json","state_url":"https://pith.science/pith/PXR7IIPBDVNG2SCMSUCH5H2IGO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PXR7IIPBDVNG2SCMSUCH5H2IGO/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":"2026-06-03T20:36:49Z","links":{"resolver":"https://pith.science/pith/PXR7IIPBDVNG2SCMSUCH5H2IGO","bundle":"https://pith.science/pith/PXR7IIPBDVNG2SCMSUCH5H2IGO/bundle.json","state":"https://pith.science/pith/PXR7IIPBDVNG2SCMSUCH5H2IGO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PXR7IIPBDVNG2SCMSUCH5H2IGO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:PXR7IIPBDVNG2SCMSUCH5H2IGO","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":"421e013ccd05a827120721d18f2b4cf12e23dab099f267cce4c73166c414310c","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2013-06-19T05:00:19Z","title_canon_sha256":"63c387b8084a4e9ad0e57355796639559fccae1bbcb7b0c043a92ff5ee59f04c"},"schema_version":"1.0","source":{"id":"1306.4423","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.4423","created_at":"2026-05-17T23:56:10Z"},{"alias_kind":"arxiv_version","alias_value":"1306.4423v1","created_at":"2026-05-17T23:56:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.4423","created_at":"2026-05-17T23:56:10Z"},{"alias_kind":"pith_short_12","alias_value":"PXR7IIPBDVNG","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_16","alias_value":"PXR7IIPBDVNG2SCM","created_at":"2026-05-18T12:27:57Z"},{"alias_kind":"pith_short_8","alias_value":"PXR7IIPB","created_at":"2026-05-18T12:27:57Z"}],"graph_snapshots":[{"event_id":"sha256:1babc56b8a48dd68fe64c1b84ce0ddb983fcbbca45c0ccfb2e9c5bb6ebbe4773","target":"graph","created_at":"2026-05-17T23:56:10Z","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":"The millimeter-long soil-dwelling nematode {\\it C. elegans} propels itself by producing undulations that propagate along its body and turns by assuming highly curved shapes. According to our recent study [PLoS ONE \\textbf{7}, e40121 (2012)] all these postures can be accurately described by a piecewise-harmonic-curvature (PHC) model. We combine this curvature-based description with highly accurate hydrodynamic bead models to evaluate the normalized velocity and turning angles for a worm swimming in an unconfined fluid and in a parallel-wall cell. We find that the worm moves twice as fast and na","authors_text":"Alejandro Bilbao, Eligiusz Wajnryb, Jerzy Blawzdziewicz, Siva Vanapalli","cross_cats":["physics.bio-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2013-06-19T05:00:19Z","title":"Nematode Locomotion in Unconfined and Confined Fluids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.4423","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":"sha256:8185327ba88d8c9454db2506890432dab8f8d53504efa6d31d68e4b1cf530a52","target":"record","created_at":"2026-05-17T23:56:10Z","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":"421e013ccd05a827120721d18f2b4cf12e23dab099f267cce4c73166c414310c","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2013-06-19T05:00:19Z","title_canon_sha256":"63c387b8084a4e9ad0e57355796639559fccae1bbcb7b0c043a92ff5ee59f04c"},"schema_version":"1.0","source":{"id":"1306.4423","kind":"arxiv","version":1}},"canonical_sha256":"7de3f421e11d5a6d484c95047e9f4833bab20db9cc07a71001596142b6f3fb7b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7de3f421e11d5a6d484c95047e9f4833bab20db9cc07a71001596142b6f3fb7b","first_computed_at":"2026-05-17T23:56:10.838187Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:10.838187Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zmGyqZ4NPongjeTi9iqeu3cPMKD5xH8OUBFwsdUrDoqJ99ATeT80oIIuyMPfca4nfV5D0tsBy2WukcmLwBbTBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:10.838941Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.4423","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8185327ba88d8c9454db2506890432dab8f8d53504efa6d31d68e4b1cf530a52","sha256:1babc56b8a48dd68fe64c1b84ce0ddb983fcbbca45c0ccfb2e9c5bb6ebbe4773"],"state_sha256":"cf54c57fe8d55fd6bed5bddb20e79dd692e89b0b5c3f55a1e694a626742af1ba"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HxmZROrdgksdHPszcp5oXIMtX8AbcaHlf9EpNAmCviB6lzp9UD1uZye6qCeVSKeiSjKZD6l0XpqLP6InAiRYBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T20:36:49.640891Z","bundle_sha256":"20afbaaf754b56bb59ebe117447659cd92536d60e8ee5e720f4cc26965e09123"}}