{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:HATR34IKY6F43NOCEGWHYZJSNE","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":"7d641d947d9d7c1f769cad77e00ed1e9142ddd7f6cb0147459507b5c14c561e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-10-24T18:50:02Z","title_canon_sha256":"2883a46ee025e68616b08fe4bced21e9069ef1ba3bfa791b02e4f9c44fef5a7b"},"schema_version":"1.0","source":{"id":"2510.21971","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2510.21971","created_at":"2026-06-29T00:14:00Z"},{"alias_kind":"arxiv_version","alias_value":"2510.21971v2","created_at":"2026-06-29T00:14:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2510.21971","created_at":"2026-06-29T00:14:00Z"},{"alias_kind":"pith_short_12","alias_value":"HATR34IKY6F4","created_at":"2026-06-29T00:14:00Z"},{"alias_kind":"pith_short_16","alias_value":"HATR34IKY6F43NOC","created_at":"2026-06-29T00:14:00Z"},{"alias_kind":"pith_short_8","alias_value":"HATR34IK","created_at":"2026-06-29T00:14:00Z"}],"graph_snapshots":[{"event_id":"sha256:ca7fd8fd0557701262ae6676a10bfc16c8498a39326511fb67703e42609fa9eb","target":"graph","created_at":"2026-06-29T00:14:00Z","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/2510.21971/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Inertial spheres settling through sharp density interfaces can arrest, reverse direction, and resume descent, a phenomenon known as bouncing. Using synchronized particle image velocimetry and tracking in water-salt and water-glycerol stratifications, we demonstrate that bouncing is the dynamic response of a coupled sphere-fluid composite. As the sphere crosses the interface, it entrains a boundary layer of lighter fluid, creating a transient buoyant wake.\n  We formalize this mechanism into a phenomenological dynamic model that couples the momentum of the sphere with the entrainment and detachm","authors_text":"Alex Liberzon, Aviv Littman, Chen Mortenfeld, Maarten van Reeuwijk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-10-24T18:50:02Z","title":"Revisiting the phenomenon of bouncing of inertial particles crossing density stratified interfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.21971","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:a21e50ab23f2adf9306dadcffd4c050557218ba4991bfd1ceea4e6b356aff5a6","target":"record","created_at":"2026-06-29T00:14:00Z","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":"7d641d947d9d7c1f769cad77e00ed1e9142ddd7f6cb0147459507b5c14c561e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2025-10-24T18:50:02Z","title_canon_sha256":"2883a46ee025e68616b08fe4bced21e9069ef1ba3bfa791b02e4f9c44fef5a7b"},"schema_version":"1.0","source":{"id":"2510.21971","kind":"arxiv","version":2}},"canonical_sha256":"38271df10ac78bcdb5c221ac7c6532691f5317c6dd4cec1a0b553b9e50ae8b17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"38271df10ac78bcdb5c221ac7c6532691f5317c6dd4cec1a0b553b9e50ae8b17","first_computed_at":"2026-06-29T00:14:00.665874Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-29T00:14:00.665874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I8adWaj53fHnBwrTtmyO+zLNXAA8UcLQO/aIvhsOukCXKMEfsAYKyPwix+66jgQH+FZ3eS5nNDf71JEoKqZxAg==","signature_status":"signed_v1","signed_at":"2026-06-29T00:14:00.666337Z","signed_message":"canonical_sha256_bytes"},"source_id":"2510.21971","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a21e50ab23f2adf9306dadcffd4c050557218ba4991bfd1ceea4e6b356aff5a6","sha256:ca7fd8fd0557701262ae6676a10bfc16c8498a39326511fb67703e42609fa9eb"],"state_sha256":"62f07d3d92c020aa8a47910dfece190db49775346c413c37b594d784a4732a6f"}