{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:YTER34QFA54MR6TX625DMUOWW7","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":"9fc7e2a3ec22b04e566d46b3d09cd532b6c21b755d4b7b88597da56d9f1b66f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2014-11-07T15:36:22Z","title_canon_sha256":"13711efc04294252643ff8f96cba8e310e04acf471e2451b45eddf7916d89f9f"},"schema_version":"1.0","source":{"id":"1411.1950","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.1950","created_at":"2026-05-18T02:17:11Z"},{"alias_kind":"arxiv_version","alias_value":"1411.1950v2","created_at":"2026-05-18T02:17:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.1950","created_at":"2026-05-18T02:17:11Z"},{"alias_kind":"pith_short_12","alias_value":"YTER34QFA54M","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YTER34QFA54MR6TX","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YTER34QF","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:d059e37560c91162e0bce18429766e3d8054a39ceb1dedb70631be17b292e25c","target":"graph","created_at":"2026-05-18T02:17:11Z","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":"We analyze the dynamics of small particles vertically confined, by means of a linear restoring force, to move within a horizontal fluid slab in a three-dimensional (3D) homogeneous isotropic turbulent velocity field. The model that we introduce and study is possibly the simplest description for the dynamics of small aquatic organisms that, due to swimming, active regulation of their buoyancy, or any other mechanism, maintain themselves in a shallow horizontal layer below the free surface of oceans or lakes. By varying the strength of the restoring force, we are able to control the thickness of","authors_text":"Federico Toschi, Herman J.H. Clercx, Luca Biferale, Massimo De Pietro, Michel A.T. van Hinsberg, Prasad Perlekar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2014-11-07T15:36:22Z","title":"Clustering of vertically constrained passive particles in homogeneous, isotropic turbulence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.1950","kind":"arxiv","version":2},"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":"sha256:7546cfafa8c2cfc690a6b63c3638ebd03b17fb97f5e40bce6108a9700d4b4419","target":"record","created_at":"2026-05-18T02:17:11Z","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":"9fc7e2a3ec22b04e566d46b3d09cd532b6c21b755d4b7b88597da56d9f1b66f8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2014-11-07T15:36:22Z","title_canon_sha256":"13711efc04294252643ff8f96cba8e310e04acf471e2451b45eddf7916d89f9f"},"schema_version":"1.0","source":{"id":"1411.1950","kind":"arxiv","version":2}},"canonical_sha256":"c4c91df2050778c8fa77f6ba3651d6b7c4e52f27cbdcc2999df9b31eb94f6261","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c4c91df2050778c8fa77f6ba3651d6b7c4e52f27cbdcc2999df9b31eb94f6261","first_computed_at":"2026-05-18T02:17:11.747601Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:11.747601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+whpsrgJaaZsTjXLyCoV7R1dbAXLJJn2Y/fiFVowuEPGgtDzQhBZ0qg0aITGzFL7TDEIEF0yaYYNFMK64gZDCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:11.748312Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.1950","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7546cfafa8c2cfc690a6b63c3638ebd03b17fb97f5e40bce6108a9700d4b4419","sha256:d059e37560c91162e0bce18429766e3d8054a39ceb1dedb70631be17b292e25c"],"state_sha256":"de5e5ad051c302d8d03f07adb82709d2b89f9910fd563d794598ae39c470618f"}