{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:MYUFBOKB3CVIZUJ3UV6FOFEG4Y","short_pith_number":"pith:MYUFBOKB","canonical_record":{"source":{"id":"1012.4798","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2010-12-21T20:57:49Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"7a7caf21fe0941a91d095ed5423a32b3450a86b929ca97e24f66039f0d0dd43c","abstract_canon_sha256":"1c61e21ee14c56c6ea29c96894bafdc87489ae79051df059d18db4d9539c36dc"},"schema_version":"1.0"},"canonical_sha256":"662850b941d8aa8cd13ba57c571486e61e7ab478272f86067ab0a600a3030486","source":{"kind":"arxiv","id":"1012.4798","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.4798","created_at":"2026-05-18T04:32:53Z"},{"alias_kind":"arxiv_version","alias_value":"1012.4798v1","created_at":"2026-05-18T04:32:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.4798","created_at":"2026-05-18T04:32:53Z"},{"alias_kind":"pith_short_12","alias_value":"MYUFBOKB3CVI","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MYUFBOKB3CVIZUJ3","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MYUFBOKB","created_at":"2026-05-18T12:26:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:MYUFBOKB3CVIZUJ3UV6FOFEG4Y","target":"record","payload":{"canonical_record":{"source":{"id":"1012.4798","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2010-12-21T20:57:49Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"7a7caf21fe0941a91d095ed5423a32b3450a86b929ca97e24f66039f0d0dd43c","abstract_canon_sha256":"1c61e21ee14c56c6ea29c96894bafdc87489ae79051df059d18db4d9539c36dc"},"schema_version":"1.0"},"canonical_sha256":"662850b941d8aa8cd13ba57c571486e61e7ab478272f86067ab0a600a3030486","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:32:53.687544Z","signature_b64":"YIt52a3RIB4c8M+Ic/YzlcJc60VPLhOSL+cE3m7KxRHWRN/0D6r86YptuROkKWOt1CIxB97YENUbkG8fA1gACA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"662850b941d8aa8cd13ba57c571486e61e7ab478272f86067ab0a600a3030486","last_reissued_at":"2026-05-18T04:32:53.687151Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:32:53.687151Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.4798","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":"2026-05-18T04:32:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zMixLut4yM2H8/UmEzfzfCw2HSsdCsRU/hjVR3P7Gu/PM0S+8xMO3hNMJWlyIXu0fqqShC5SoECXRwRE8pGkDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:35:52.083866Z"},"content_sha256":"e73c859ef894394293197a898c46a4087edf0f1aebe2c4661fafa16341756e0d","schema_version":"1.0","event_id":"sha256:e73c859ef894394293197a898c46a4087edf0f1aebe2c4661fafa16341756e0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:MYUFBOKB3CVIZUJ3UV6FOFEG4Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The collective motion of nematodes in a thin liquid layer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.flu-dyn"],"primary_cat":"physics.bio-ph","authors_text":"Dominic Vella, Sean Gart, Sunghwan Jung","submitted_at":"2010-12-21T20:57:49Z","abstract_excerpt":"Many organisms live in confined fluidic environments such as the thin liquid layers on the skin of host organisms or in partially- saturated soil. We investigate the collective behaviour of nematodes in a thin liquid layer, which was first observed by Gray and Lissmann, [J. Exp. Biol. 41, 135 (1964)]. We show experimentally that nematodes confined by a thin liquid film come into contact and only separate again after some intervention. We attribute this collective motion to an attractive force between them arising from the surface tension of the layer and show that for nearby nematodes this for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.4798","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":"2026-05-18T04:32:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PlXenN7sPUijtEZCS5iY+1FlBa7IbIoTHPaI3FSY5pBJOXsO/oO19LjQNA8JAuDze0wuEVwv9H2OKz5wPrmNDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T06:35:52.084460Z"},"content_sha256":"d16747dbc9781440ba357e777637c53374e6de48fe39cfa73bc0aa4de3ba4176","schema_version":"1.0","event_id":"sha256:d16747dbc9781440ba357e777637c53374e6de48fe39cfa73bc0aa4de3ba4176"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MYUFBOKB3CVIZUJ3UV6FOFEG4Y/bundle.json","state_url":"https://pith.science/pith/MYUFBOKB3CVIZUJ3UV6FOFEG4Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MYUFBOKB3CVIZUJ3UV6FOFEG4Y/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":"2026-06-05T06:35:52Z","links":{"resolver":"https://pith.science/pith/MYUFBOKB3CVIZUJ3UV6FOFEG4Y","bundle":"https://pith.science/pith/MYUFBOKB3CVIZUJ3UV6FOFEG4Y/bundle.json","state":"https://pith.science/pith/MYUFBOKB3CVIZUJ3UV6FOFEG4Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MYUFBOKB3CVIZUJ3UV6FOFEG4Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:MYUFBOKB3CVIZUJ3UV6FOFEG4Y","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":"1c61e21ee14c56c6ea29c96894bafdc87489ae79051df059d18db4d9539c36dc","cross_cats_sorted":["physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2010-12-21T20:57:49Z","title_canon_sha256":"7a7caf21fe0941a91d095ed5423a32b3450a86b929ca97e24f66039f0d0dd43c"},"schema_version":"1.0","source":{"id":"1012.4798","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.4798","created_at":"2026-05-18T04:32:53Z"},{"alias_kind":"arxiv_version","alias_value":"1012.4798v1","created_at":"2026-05-18T04:32:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.4798","created_at":"2026-05-18T04:32:53Z"},{"alias_kind":"pith_short_12","alias_value":"MYUFBOKB3CVI","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MYUFBOKB3CVIZUJ3","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MYUFBOKB","created_at":"2026-05-18T12:26:10Z"}],"graph_snapshots":[{"event_id":"sha256:d16747dbc9781440ba357e777637c53374e6de48fe39cfa73bc0aa4de3ba4176","target":"graph","created_at":"2026-05-18T04:32:53Z","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":"Many organisms live in confined fluidic environments such as the thin liquid layers on the skin of host organisms or in partially- saturated soil. We investigate the collective behaviour of nematodes in a thin liquid layer, which was first observed by Gray and Lissmann, [J. Exp. Biol. 41, 135 (1964)]. We show experimentally that nematodes confined by a thin liquid film come into contact and only separate again after some intervention. We attribute this collective motion to an attractive force between them arising from the surface tension of the layer and show that for nearby nematodes this for","authors_text":"Dominic Vella, Sean Gart, Sunghwan Jung","cross_cats":["physics.flu-dyn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2010-12-21T20:57:49Z","title":"The collective motion of nematodes in a thin liquid layer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.4798","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:e73c859ef894394293197a898c46a4087edf0f1aebe2c4661fafa16341756e0d","target":"record","created_at":"2026-05-18T04:32:53Z","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":"1c61e21ee14c56c6ea29c96894bafdc87489ae79051df059d18db4d9539c36dc","cross_cats_sorted":["physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2010-12-21T20:57:49Z","title_canon_sha256":"7a7caf21fe0941a91d095ed5423a32b3450a86b929ca97e24f66039f0d0dd43c"},"schema_version":"1.0","source":{"id":"1012.4798","kind":"arxiv","version":1}},"canonical_sha256":"662850b941d8aa8cd13ba57c571486e61e7ab478272f86067ab0a600a3030486","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"662850b941d8aa8cd13ba57c571486e61e7ab478272f86067ab0a600a3030486","first_computed_at":"2026-05-18T04:32:53.687151Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:32:53.687151Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YIt52a3RIB4c8M+Ic/YzlcJc60VPLhOSL+cE3m7KxRHWRN/0D6r86YptuROkKWOt1CIxB97YENUbkG8fA1gACA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:32:53.687544Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.4798","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e73c859ef894394293197a898c46a4087edf0f1aebe2c4661fafa16341756e0d","sha256:d16747dbc9781440ba357e777637c53374e6de48fe39cfa73bc0aa4de3ba4176"],"state_sha256":"0e8705af1355526b1926f0cf108deaaaa38a37078a672aeb2cd0d5089b7890c0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JwJyKaLodipEr6M2oFiauuf6w3tUDaA+FAosZIXD7iwTWodqV6zBXATnnytQ1LPFyqnFFhXnWIJGTcC/tJJPDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T06:35:52.087492Z","bundle_sha256":"b7374f0501f155e3acadfb9c4c40d272e368d9b72bce6058bd7af174db937e4f"}}