{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:BOKDM7T4MXBOV6LTH22S6BJAXW","short_pith_number":"pith:BOKDM7T4","canonical_record":{"source":{"id":"2211.04579","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2022-11-08T21:56:03Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"0181c2c6d87a16d81f56c06b8ed2ec2fe577fc4f529f5cba005b7b497d23a379","abstract_canon_sha256":"55a3e15cc6c66a767194a953b7fb7883a10b171fbba6d4ee6534b31553d0b7f6"},"schema_version":"1.0"},"canonical_sha256":"0b94367e7c65c2eaf9733eb52f0520bda9a8f1d259a8ac86245b2725eb9b5718","source":{"kind":"arxiv","id":"2211.04579","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.04579","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"arxiv_version","alias_value":"2211.04579v3","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.04579","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"pith_short_12","alias_value":"BOKDM7T4MXBO","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"pith_short_16","alias_value":"BOKDM7T4MXBOV6LT","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"pith_short_8","alias_value":"BOKDM7T4","created_at":"2026-07-05T06:25:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:BOKDM7T4MXBOV6LTH22S6BJAXW","target":"record","payload":{"canonical_record":{"source":{"id":"2211.04579","kind":"arxiv","version":3},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2022-11-08T21:56:03Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"0181c2c6d87a16d81f56c06b8ed2ec2fe577fc4f529f5cba005b7b497d23a379","abstract_canon_sha256":"55a3e15cc6c66a767194a953b7fb7883a10b171fbba6d4ee6534b31553d0b7f6"},"schema_version":"1.0"},"canonical_sha256":"0b94367e7c65c2eaf9733eb52f0520bda9a8f1d259a8ac86245b2725eb9b5718","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:25:15.190240Z","signature_b64":"MkxwoPFGA0JhEIGLMMV0HuCgVUpM/Iyzo5qLIqDeVSmrIPk4Yqo2zN4VLe37CE2A1rItyjM3uognsv1ZkOFcDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b94367e7c65c2eaf9733eb52f0520bda9a8f1d259a8ac86245b2725eb9b5718","last_reissued_at":"2026-07-05T06:25:15.189761Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:25:15.189761Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2211.04579","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:25:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lqV7c4EDJDmtQQDj7iP18p7o4QN26NIWxx0pSj7U7NG32f7swUtNsGeFrMysNXeNg9rURnuVqH9FjT0QSaeQDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T05:40:50.654339Z"},"content_sha256":"6af6669254406361ed0de25155570f4fc5bef94638e7987a763f8ee265140d76","schema_version":"1.0","event_id":"sha256:6af6669254406361ed0de25155570f4fc5bef94638e7987a763f8ee265140d76"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:BOKDM7T4MXBOV6LTH22S6BJAXW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Incompressible Squeeze-Film Levitation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"physics.flu-dyn","authors_text":"Aim\\'ee Sakes, Micha\\\"el Wiertlewski, Mostafa A. Atalla, Ron A. J. van Ostayen","submitted_at":"2022-11-08T21:56:03Z","abstract_excerpt":"Transverse vibrations can induce the non-linear compression of a thin film of air to levitate objects, via the squeeze film effect. This phenomenon is well captured by the Reynolds' lubrication theory, however, the same theory fails to describe this levitation when the fluid is incompressible. In this case, the computation predicts no steady-state levitation, contradicting the documented experimental evidence. In this letter, we uncover the main source of the time-averaged pressure asymmetry in the incompressible fluid thin film, leading the levitation phenomenon to exist. Furthermore, we reve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.04579","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2211.04579/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T06:25:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vkpU3CWCFqU2fQJ/CXLmF2wDBiUpPqXuPNESfMwU8pH7lrDgYkv3c6XVrO6Rpbzdxn+xqI0F8NXevAOQ71KuBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T05:40:50.654975Z"},"content_sha256":"8a24a3e89f32dc4fe766cbcedfbe8cccb6dd340666674a0be45e31f1b7a38175","schema_version":"1.0","event_id":"sha256:8a24a3e89f32dc4fe766cbcedfbe8cccb6dd340666674a0be45e31f1b7a38175"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BOKDM7T4MXBOV6LTH22S6BJAXW/bundle.json","state_url":"https://pith.science/pith/BOKDM7T4MXBOV6LTH22S6BJAXW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BOKDM7T4MXBOV6LTH22S6BJAXW/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":"2026-07-09T05:40:50Z","links":{"resolver":"https://pith.science/pith/BOKDM7T4MXBOV6LTH22S6BJAXW","bundle":"https://pith.science/pith/BOKDM7T4MXBOV6LTH22S6BJAXW/bundle.json","state":"https://pith.science/pith/BOKDM7T4MXBOV6LTH22S6BJAXW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BOKDM7T4MXBOV6LTH22S6BJAXW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:BOKDM7T4MXBOV6LTH22S6BJAXW","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":"55a3e15cc6c66a767194a953b7fb7883a10b171fbba6d4ee6534b31553d0b7f6","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2022-11-08T21:56:03Z","title_canon_sha256":"0181c2c6d87a16d81f56c06b8ed2ec2fe577fc4f529f5cba005b7b497d23a379"},"schema_version":"1.0","source":{"id":"2211.04579","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.04579","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"arxiv_version","alias_value":"2211.04579v3","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.04579","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"pith_short_12","alias_value":"BOKDM7T4MXBO","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"pith_short_16","alias_value":"BOKDM7T4MXBOV6LT","created_at":"2026-07-05T06:25:15Z"},{"alias_kind":"pith_short_8","alias_value":"BOKDM7T4","created_at":"2026-07-05T06:25:15Z"}],"graph_snapshots":[{"event_id":"sha256:8a24a3e89f32dc4fe766cbcedfbe8cccb6dd340666674a0be45e31f1b7a38175","target":"graph","created_at":"2026-07-05T06:25:15Z","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/2211.04579/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Transverse vibrations can induce the non-linear compression of a thin film of air to levitate objects, via the squeeze film effect. This phenomenon is well captured by the Reynolds' lubrication theory, however, the same theory fails to describe this levitation when the fluid is incompressible. In this case, the computation predicts no steady-state levitation, contradicting the documented experimental evidence. In this letter, we uncover the main source of the time-averaged pressure asymmetry in the incompressible fluid thin film, leading the levitation phenomenon to exist. Furthermore, we reve","authors_text":"Aim\\'ee Sakes, Micha\\\"el Wiertlewski, Mostafa A. Atalla, Ron A. J. van Ostayen","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2022-11-08T21:56:03Z","title":"Incompressible Squeeze-Film Levitation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.04579","kind":"arxiv","version":3},"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":"sha256:6af6669254406361ed0de25155570f4fc5bef94638e7987a763f8ee265140d76","target":"record","created_at":"2026-07-05T06:25:15Z","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":"55a3e15cc6c66a767194a953b7fb7883a10b171fbba6d4ee6534b31553d0b7f6","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.flu-dyn","submitted_at":"2022-11-08T21:56:03Z","title_canon_sha256":"0181c2c6d87a16d81f56c06b8ed2ec2fe577fc4f529f5cba005b7b497d23a379"},"schema_version":"1.0","source":{"id":"2211.04579","kind":"arxiv","version":3}},"canonical_sha256":"0b94367e7c65c2eaf9733eb52f0520bda9a8f1d259a8ac86245b2725eb9b5718","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0b94367e7c65c2eaf9733eb52f0520bda9a8f1d259a8ac86245b2725eb9b5718","first_computed_at":"2026-07-05T06:25:15.189761Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:25:15.189761Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MkxwoPFGA0JhEIGLMMV0HuCgVUpM/Iyzo5qLIqDeVSmrIPk4Yqo2zN4VLe37CE2A1rItyjM3uognsv1ZkOFcDg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:25:15.190240Z","signed_message":"canonical_sha256_bytes"},"source_id":"2211.04579","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6af6669254406361ed0de25155570f4fc5bef94638e7987a763f8ee265140d76","sha256:8a24a3e89f32dc4fe766cbcedfbe8cccb6dd340666674a0be45e31f1b7a38175"],"state_sha256":"a579384d9be17cd87fdcd4d998208dbeb5aef473ff37523ff80c7843b8332546"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uIzCK4G1eNsxMTVUNgUjxGR5XswJsuSoFIooJkhEYcZ6A+GAYtV2+P2YB7huUwE5zjyiM0PO8G0ktfqbdsA6DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T05:40:50.659352Z","bundle_sha256":"855331fc293439d44f7d340b0afb45984c01079deaf5540bd33497b0174ce985"}}