{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:MF47KJTGAYPUNQ5DPAG23DHLWX","short_pith_number":"pith:MF47KJTG","canonical_record":{"source":{"id":"1502.02869","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-02-10T11:49:27Z","cross_cats_sorted":[],"title_canon_sha256":"43e37eb1d14e0a07888888dcd19901e2f6a2122a540644aa2b08c95d3c80e2b2","abstract_canon_sha256":"a8b039a1f135d2d38a6a9e31c7c537cfcacbddaf7040dc36b9acb6fc69a2091f"},"schema_version":"1.0"},"canonical_sha256":"6179f52666061f46c3a3780dad8cebb5dfc64c2c4e94de00707d64845ba0f63e","source":{"kind":"arxiv","id":"1502.02869","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.02869","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"arxiv_version","alias_value":"1502.02869v1","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.02869","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"pith_short_12","alias_value":"MF47KJTGAYPU","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MF47KJTGAYPUNQ5D","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MF47KJTG","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:MF47KJTGAYPUNQ5DPAG23DHLWX","target":"record","payload":{"canonical_record":{"source":{"id":"1502.02869","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-02-10T11:49:27Z","cross_cats_sorted":[],"title_canon_sha256":"43e37eb1d14e0a07888888dcd19901e2f6a2122a540644aa2b08c95d3c80e2b2","abstract_canon_sha256":"a8b039a1f135d2d38a6a9e31c7c537cfcacbddaf7040dc36b9acb6fc69a2091f"},"schema_version":"1.0"},"canonical_sha256":"6179f52666061f46c3a3780dad8cebb5dfc64c2c4e94de00707d64845ba0f63e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:53.135173Z","signature_b64":"sveArAVfI42WPpEzaAuWraMglQ4WPd33qHVCOQHUyoquxEiO5nXiuhr6IQyaSsPFhWbLC6PejSVbUC2ATfwYDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6179f52666061f46c3a3780dad8cebb5dfc64c2c4e94de00707d64845ba0f63e","last_reissued_at":"2026-05-18T01:16:53.134387Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:53.134387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.02869","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":"2026-05-18T01:16:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w29f6Nv6lNd20x+HK01ZXhsiaZ7YcygClC4tbsAtnK6dujzEEwnenloWESk608wIvP+A3f+bvCJdXJWcXTGvBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:06:31.055042Z"},"content_sha256":"d27529951a42a4022f3157c3419c90f47365f1c5b29294a1c335385a72dbdbda","schema_version":"1.0","event_id":"sha256:d27529951a42a4022f3157c3419c90f47365f1c5b29294a1c335385a72dbdbda"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:MF47KJTGAYPUNQ5DPAG23DHLWX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Universal mechanism for air entrainment during liquid impact","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Detlef Lohse, Devaraj van der Meer, Jacco H. Snoeijer, Maurice H.W. Hendrix, Wilco Bouwhuis","submitted_at":"2015-02-10T11:49:27Z","abstract_excerpt":"When a mm-sized liquid drop approaches a deep liquid pool, both the interface of the drop and the pool deform before the drop touches the pool. The build up of air pressure prior to coalescence is responsible for this deformation. Due to this deformation, air can be entrained at the bottom of the drop during the impact. We quantify the amount of entrained air numerically, using the Boundary Integral Method (BIM) for potential flow for the drop and the pool, coupled to viscous lubrication theory for the air film that has to be squeezed out during impact. We compare our results to various experi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.02869","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":"2026-05-18T01:16:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5+8Gk1isBmKl+sAyZgIF+SKW5AlXx34MAF5phYUvvBDHquSRhOG0ipi3aAHSaaigL/FBsJ5BiNgT3NVkFVm/Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:06:31.055496Z"},"content_sha256":"ac207e27f9ac9cad2e3df04234991997fa2bf1e7085aa65c0ee408bb931a934a","schema_version":"1.0","event_id":"sha256:ac207e27f9ac9cad2e3df04234991997fa2bf1e7085aa65c0ee408bb931a934a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MF47KJTGAYPUNQ5DPAG23DHLWX/bundle.json","state_url":"https://pith.science/pith/MF47KJTGAYPUNQ5DPAG23DHLWX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MF47KJTGAYPUNQ5DPAG23DHLWX/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":"2026-05-26T23:06:31Z","links":{"resolver":"https://pith.science/pith/MF47KJTGAYPUNQ5DPAG23DHLWX","bundle":"https://pith.science/pith/MF47KJTGAYPUNQ5DPAG23DHLWX/bundle.json","state":"https://pith.science/pith/MF47KJTGAYPUNQ5DPAG23DHLWX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MF47KJTGAYPUNQ5DPAG23DHLWX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MF47KJTGAYPUNQ5DPAG23DHLWX","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":"a8b039a1f135d2d38a6a9e31c7c537cfcacbddaf7040dc36b9acb6fc69a2091f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-02-10T11:49:27Z","title_canon_sha256":"43e37eb1d14e0a07888888dcd19901e2f6a2122a540644aa2b08c95d3c80e2b2"},"schema_version":"1.0","source":{"id":"1502.02869","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.02869","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"arxiv_version","alias_value":"1502.02869v1","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.02869","created_at":"2026-05-18T01:16:53Z"},{"alias_kind":"pith_short_12","alias_value":"MF47KJTGAYPU","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MF47KJTGAYPUNQ5D","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MF47KJTG","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:ac207e27f9ac9cad2e3df04234991997fa2bf1e7085aa65c0ee408bb931a934a","target":"graph","created_at":"2026-05-18T01:16:53Z","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":"When a mm-sized liquid drop approaches a deep liquid pool, both the interface of the drop and the pool deform before the drop touches the pool. The build up of air pressure prior to coalescence is responsible for this deformation. Due to this deformation, air can be entrained at the bottom of the drop during the impact. We quantify the amount of entrained air numerically, using the Boundary Integral Method (BIM) for potential flow for the drop and the pool, coupled to viscous lubrication theory for the air film that has to be squeezed out during impact. We compare our results to various experi","authors_text":"Detlef Lohse, Devaraj van der Meer, Jacco H. Snoeijer, Maurice H.W. Hendrix, Wilco Bouwhuis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-02-10T11:49:27Z","title":"Universal mechanism for air entrainment during liquid impact"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.02869","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:d27529951a42a4022f3157c3419c90f47365f1c5b29294a1c335385a72dbdbda","target":"record","created_at":"2026-05-18T01:16:53Z","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":"a8b039a1f135d2d38a6a9e31c7c537cfcacbddaf7040dc36b9acb6fc69a2091f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-02-10T11:49:27Z","title_canon_sha256":"43e37eb1d14e0a07888888dcd19901e2f6a2122a540644aa2b08c95d3c80e2b2"},"schema_version":"1.0","source":{"id":"1502.02869","kind":"arxiv","version":1}},"canonical_sha256":"6179f52666061f46c3a3780dad8cebb5dfc64c2c4e94de00707d64845ba0f63e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6179f52666061f46c3a3780dad8cebb5dfc64c2c4e94de00707d64845ba0f63e","first_computed_at":"2026-05-18T01:16:53.134387Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:53.134387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sveArAVfI42WPpEzaAuWraMglQ4WPd33qHVCOQHUyoquxEiO5nXiuhr6IQyaSsPFhWbLC6PejSVbUC2ATfwYDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:53.135173Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.02869","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d27529951a42a4022f3157c3419c90f47365f1c5b29294a1c335385a72dbdbda","sha256:ac207e27f9ac9cad2e3df04234991997fa2bf1e7085aa65c0ee408bb931a934a"],"state_sha256":"33e906ead048a1aff3033071f5b283fd4f9125b78bb2a4ee3ef829222137d93f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4VWRC0zRns5ktMwXRmAREV0WGVEHrhP2Soy9HRm6POSYohvOXrVSlFsxJHJUcmULVcYHD7zl3jqCl+CzD3X9BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:06:31.058786Z","bundle_sha256":"1eebcd28d6f78d72b78b0c0b3553935885425d7a91ab961615bc62594d5215dd"}}