{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:ZP72GZE5D4OT7A7XNHAHPLWGWP","short_pith_number":"pith:ZP72GZE5","canonical_record":{"source":{"id":"0911.1731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2009-11-09T17:16:50Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"7b6bd11986faca9707bf07a4afb5cf15fbd71f9ffb614acc7086d07e12aa2f5a","abstract_canon_sha256":"1a0ec44238b3c8001081bf184abbd50750a7cffa27c9a9b7845d6c263625d445"},"schema_version":"1.0"},"canonical_sha256":"cbffa3649d1f1d3f83f769c077aec6b3c3cb725ad24448366d40230ae0766460","source":{"kind":"arxiv","id":"0911.1731","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1731","created_at":"2026-05-18T00:39:05Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1731v1","created_at":"2026-05-18T00:39:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1731","created_at":"2026-05-18T00:39:05Z"},{"alias_kind":"pith_short_12","alias_value":"ZP72GZE5D4OT","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZP72GZE5D4OT7A7X","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZP72GZE5","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:ZP72GZE5D4OT7A7XNHAHPLWGWP","target":"record","payload":{"canonical_record":{"source":{"id":"0911.1731","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2009-11-09T17:16:50Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"7b6bd11986faca9707bf07a4afb5cf15fbd71f9ffb614acc7086d07e12aa2f5a","abstract_canon_sha256":"1a0ec44238b3c8001081bf184abbd50750a7cffa27c9a9b7845d6c263625d445"},"schema_version":"1.0"},"canonical_sha256":"cbffa3649d1f1d3f83f769c077aec6b3c3cb725ad24448366d40230ae0766460","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:05.216340Z","signature_b64":"wswI7uXUHmP88IaILcXdM5DF7V+SR4LZVVpJ34TOlgMJhCksKiTj5/lKoJehGeIHvHm40Czr9fKI4xD3AmveCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cbffa3649d1f1d3f83f769c077aec6b3c3cb725ad24448366d40230ae0766460","last_reissued_at":"2026-05-18T00:39:05.215675Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:05.215675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0911.1731","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":"2026-05-18T00:39:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bk2exgZ+DSUMVnJMAOXyiciHsWc+CgHrJVttjgABjYjpRwNj77I91DZsstVVnWaRQZxZYW4WmUITuvPnr6/IAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T23:14:07.606131Z"},"content_sha256":"38f5dd60bcee1dd4d7272ecdb0fa1baf62ae3241b06c431fa7c0995056927b04","schema_version":"1.0","event_id":"sha256:38f5dd60bcee1dd4d7272ecdb0fa1baf62ae3241b06c431fa7c0995056927b04"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:ZP72GZE5D4OT7A7XNHAHPLWGWP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Material properties of of Caenorhabditis elegans swimming at low Reynolds number","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.flu-dyn"],"primary_cat":"physics.bio-ph","authors_text":"Josue Sznitman, Paulo E. Arratia, Prashant K. Purohit, Predrag Krajacic, Todd Lamitina","submitted_at":"2009-11-09T17:16:50Z","abstract_excerpt":"Undulatory locomotion, as seen in the nematode \\emph{Caenorhabditis elegans}, is a common swimming gait of organisms in the low Reynolds number regime, where viscous forces are dominant. While the nematode's motility is expected to be a strong function of its material properties, measurements remain scarce. Here, the swimming behavior of \\emph{C.} \\emph{elegans} are investigated in experiments and in a simple model. Experiments reveal that nematodes swim in a periodic fashion and generate traveling waves which decay from head to tail. The model is able to capture the experiments' main features"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1731","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":"2026-05-18T00:39:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tLwZBQa7STAF+7acrybDXx8IECfUSnooM3+SIpw3D1+ZxhlNBjaRn7892YKHzQF4323Ak1yYOXFBF/co7085CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T23:14:07.606903Z"},"content_sha256":"1d574cdaaedd27c8e35303fa2037e95171983832700077e0367215cbfe5bdaf0","schema_version":"1.0","event_id":"sha256:1d574cdaaedd27c8e35303fa2037e95171983832700077e0367215cbfe5bdaf0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZP72GZE5D4OT7A7XNHAHPLWGWP/bundle.json","state_url":"https://pith.science/pith/ZP72GZE5D4OT7A7XNHAHPLWGWP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZP72GZE5D4OT7A7XNHAHPLWGWP/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":"2026-05-30T23:14:07Z","links":{"resolver":"https://pith.science/pith/ZP72GZE5D4OT7A7XNHAHPLWGWP","bundle":"https://pith.science/pith/ZP72GZE5D4OT7A7XNHAHPLWGWP/bundle.json","state":"https://pith.science/pith/ZP72GZE5D4OT7A7XNHAHPLWGWP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZP72GZE5D4OT7A7XNHAHPLWGWP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZP72GZE5D4OT7A7XNHAHPLWGWP","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":"1a0ec44238b3c8001081bf184abbd50750a7cffa27c9a9b7845d6c263625d445","cross_cats_sorted":["physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2009-11-09T17:16:50Z","title_canon_sha256":"7b6bd11986faca9707bf07a4afb5cf15fbd71f9ffb614acc7086d07e12aa2f5a"},"schema_version":"1.0","source":{"id":"0911.1731","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.1731","created_at":"2026-05-18T00:39:05Z"},{"alias_kind":"arxiv_version","alias_value":"0911.1731v1","created_at":"2026-05-18T00:39:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.1731","created_at":"2026-05-18T00:39:05Z"},{"alias_kind":"pith_short_12","alias_value":"ZP72GZE5D4OT","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"ZP72GZE5D4OT7A7X","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"ZP72GZE5","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:1d574cdaaedd27c8e35303fa2037e95171983832700077e0367215cbfe5bdaf0","target":"graph","created_at":"2026-05-18T00:39:05Z","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":"Undulatory locomotion, as seen in the nematode \\emph{Caenorhabditis elegans}, is a common swimming gait of organisms in the low Reynolds number regime, where viscous forces are dominant. While the nematode's motility is expected to be a strong function of its material properties, measurements remain scarce. Here, the swimming behavior of \\emph{C.} \\emph{elegans} are investigated in experiments and in a simple model. Experiments reveal that nematodes swim in a periodic fashion and generate traveling waves which decay from head to tail. The model is able to capture the experiments' main features","authors_text":"Josue Sznitman, Paulo E. Arratia, Prashant K. Purohit, Predrag Krajacic, Todd Lamitina","cross_cats":["physics.flu-dyn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2009-11-09T17:16:50Z","title":"Material properties of of Caenorhabditis elegans swimming at low Reynolds number"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.1731","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":"sha256:38f5dd60bcee1dd4d7272ecdb0fa1baf62ae3241b06c431fa7c0995056927b04","target":"record","created_at":"2026-05-18T00:39:05Z","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":"1a0ec44238b3c8001081bf184abbd50750a7cffa27c9a9b7845d6c263625d445","cross_cats_sorted":["physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2009-11-09T17:16:50Z","title_canon_sha256":"7b6bd11986faca9707bf07a4afb5cf15fbd71f9ffb614acc7086d07e12aa2f5a"},"schema_version":"1.0","source":{"id":"0911.1731","kind":"arxiv","version":1}},"canonical_sha256":"cbffa3649d1f1d3f83f769c077aec6b3c3cb725ad24448366d40230ae0766460","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cbffa3649d1f1d3f83f769c077aec6b3c3cb725ad24448366d40230ae0766460","first_computed_at":"2026-05-18T00:39:05.215675Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:05.215675Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wswI7uXUHmP88IaILcXdM5DF7V+SR4LZVVpJ34TOlgMJhCksKiTj5/lKoJehGeIHvHm40Czr9fKI4xD3AmveCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:05.216340Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.1731","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:38f5dd60bcee1dd4d7272ecdb0fa1baf62ae3241b06c431fa7c0995056927b04","sha256:1d574cdaaedd27c8e35303fa2037e95171983832700077e0367215cbfe5bdaf0"],"state_sha256":"1d22ed2b98836e498882eed7b7c6848401cd860ae48a7768dac7676d96e481ec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CJfXE0JhwnQBNRcudDIBPvoGcj8a1svD4Kj+y28T/VnTNRmLg7T2JfoYtDlIax5IdVkR+JsB8y0E4uMSNNRcCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T23:14:07.611351Z","bundle_sha256":"491f6dd4dd7d3f27f02fb8e522fcda83798212e5b35fd3bc7f34046ae9e12e8e"}}