{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:INKGCA4UKLZX5VPYY7CJLED5QN","short_pith_number":"pith:INKGCA4U","canonical_record":{"source":{"id":"1904.10673","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2019-04-24T07:54:13Z","cross_cats_sorted":[],"title_canon_sha256":"cc6011fb0873786bf7da263a34acdd8c714975c7a71e1a2c8fde471d43d7a03c","abstract_canon_sha256":"ad46c199144075ccb1a8ccd25323887e8cb6406573a9663230a578c4fee050ab"},"schema_version":"1.0"},"canonical_sha256":"435461039452f37ed5f8c7c495907d834b8851067f593c04018207526a9bbaf2","source":{"kind":"arxiv","id":"1904.10673","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.10673","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"arxiv_version","alias_value":"1904.10673v2","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.10673","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"pith_short_12","alias_value":"INKGCA4UKLZX","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"pith_short_16","alias_value":"INKGCA4UKLZX5VPY","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"pith_short_8","alias_value":"INKGCA4U","created_at":"2026-07-05T07:35:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:INKGCA4UKLZX5VPYY7CJLED5QN","target":"record","payload":{"canonical_record":{"source":{"id":"1904.10673","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2019-04-24T07:54:13Z","cross_cats_sorted":[],"title_canon_sha256":"cc6011fb0873786bf7da263a34acdd8c714975c7a71e1a2c8fde471d43d7a03c","abstract_canon_sha256":"ad46c199144075ccb1a8ccd25323887e8cb6406573a9663230a578c4fee050ab"},"schema_version":"1.0"},"canonical_sha256":"435461039452f37ed5f8c7c495907d834b8851067f593c04018207526a9bbaf2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:35:14.747072Z","signature_b64":"OEqcaauMDe9GIRUZnmEGanJKjYYgtg6swslnApi695Fn+dGoZOVAtMvHKd9mVEJ7ZWcvzsAAQp5zX6xNJmU2DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"435461039452f37ed5f8c7c495907d834b8851067f593c04018207526a9bbaf2","last_reissued_at":"2026-07-05T07:35:14.746577Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:35:14.746577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.10673","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:35:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FdoRFia/Tjlwwx1g2E8+fZlUq1mmzzZVOd/V4kcmhS0y9r0XlIffu/DPGA3rZZ6Lq0Lkr53mAxPWLGOXNf5FDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T19:34:53.329451Z"},"content_sha256":"31318c7efd5ae60cd0e27171905086ba733f236562d87e1ce656cc1f1a9cf383","schema_version":"1.0","event_id":"sha256:31318c7efd5ae60cd0e27171905086ba733f236562d87e1ce656cc1f1a9cf383"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:INKGCA4UKLZX5VPYY7CJLED5QN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extensive tip-splitting of injected organic liquid into an aqueous viscoelastic fluid","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Ayane Pygoscelis Sato, Kiwamu Yoshii, Kojiro Otoguro, Yutaka Sumino","submitted_at":"2019-04-24T07:54:13Z","abstract_excerpt":"The injection of a fluid into another fluid causes a spatiotemporal pattern along the injection front. Viscous fingering is a well-known example when the replaced material is a viscous fluid. Notably, most fluids are, in reality, viscoelastic, i.e., they behave as an elastic solid over short timescales. For this reason, it is important to study the situation when the replaced fluid is viscoelastic. In this study, we observe extensive tip-splitting in the fingering pattern when an incompressible organic liquid was injected into an oleophilic Hele--Shaw cell filled with an aqueous viscoelastic f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.10673","kind":"arxiv","version":2},"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/1904.10673/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":"2026-07-05T07:35:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oiD4RD02cGbANE+StcRDES3EJHhY9WNWOgjPQNGIdXThzx2mNJw7kiFmtvW4QmVZp9sNcu8m0j17KJireVFeCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T19:34:53.330297Z"},"content_sha256":"e4582c6d77115f83d856109e1bf253f87311621b9d08d2994f4a381e5f59ec09","schema_version":"1.0","event_id":"sha256:e4582c6d77115f83d856109e1bf253f87311621b9d08d2994f4a381e5f59ec09"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/INKGCA4UKLZX5VPYY7CJLED5QN/bundle.json","state_url":"https://pith.science/pith/INKGCA4UKLZX5VPYY7CJLED5QN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/INKGCA4UKLZX5VPYY7CJLED5QN/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":"2026-08-14T19:34:53Z","links":{"resolver":"https://pith.science/pith/INKGCA4UKLZX5VPYY7CJLED5QN","bundle":"https://pith.science/pith/INKGCA4UKLZX5VPYY7CJLED5QN/bundle.json","state":"https://pith.science/pith/INKGCA4UKLZX5VPYY7CJLED5QN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/INKGCA4UKLZX5VPYY7CJLED5QN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:INKGCA4UKLZX5VPYY7CJLED5QN","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":"ad46c199144075ccb1a8ccd25323887e8cb6406573a9663230a578c4fee050ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2019-04-24T07:54:13Z","title_canon_sha256":"cc6011fb0873786bf7da263a34acdd8c714975c7a71e1a2c8fde471d43d7a03c"},"schema_version":"1.0","source":{"id":"1904.10673","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.10673","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"arxiv_version","alias_value":"1904.10673v2","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.10673","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"pith_short_12","alias_value":"INKGCA4UKLZX","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"pith_short_16","alias_value":"INKGCA4UKLZX5VPY","created_at":"2026-07-05T07:35:14Z"},{"alias_kind":"pith_short_8","alias_value":"INKGCA4U","created_at":"2026-07-05T07:35:14Z"}],"graph_snapshots":[{"event_id":"sha256:e4582c6d77115f83d856109e1bf253f87311621b9d08d2994f4a381e5f59ec09","target":"graph","created_at":"2026-07-05T07:35:14Z","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/1904.10673/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The injection of a fluid into another fluid causes a spatiotemporal pattern along the injection front. Viscous fingering is a well-known example when the replaced material is a viscous fluid. Notably, most fluids are, in reality, viscoelastic, i.e., they behave as an elastic solid over short timescales. For this reason, it is important to study the situation when the replaced fluid is viscoelastic. In this study, we observe extensive tip-splitting in the fingering pattern when an incompressible organic liquid was injected into an oleophilic Hele--Shaw cell filled with an aqueous viscoelastic f","authors_text":"Ayane Pygoscelis Sato, Kiwamu Yoshii, Kojiro Otoguro, Yutaka Sumino","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2019-04-24T07:54:13Z","title":"Extensive tip-splitting of injected organic liquid into an aqueous viscoelastic fluid"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.10673","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":"sha256:31318c7efd5ae60cd0e27171905086ba733f236562d87e1ce656cc1f1a9cf383","target":"record","created_at":"2026-07-05T07:35:14Z","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":"ad46c199144075ccb1a8ccd25323887e8cb6406573a9663230a578c4fee050ab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2019-04-24T07:54:13Z","title_canon_sha256":"cc6011fb0873786bf7da263a34acdd8c714975c7a71e1a2c8fde471d43d7a03c"},"schema_version":"1.0","source":{"id":"1904.10673","kind":"arxiv","version":2}},"canonical_sha256":"435461039452f37ed5f8c7c495907d834b8851067f593c04018207526a9bbaf2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"435461039452f37ed5f8c7c495907d834b8851067f593c04018207526a9bbaf2","first_computed_at":"2026-07-05T07:35:14.746577Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:35:14.746577Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OEqcaauMDe9GIRUZnmEGanJKjYYgtg6swslnApi695Fn+dGoZOVAtMvHKd9mVEJ7ZWcvzsAAQp5zX6xNJmU2DA==","signature_status":"signed_v1","signed_at":"2026-07-05T07:35:14.747072Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.10673","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31318c7efd5ae60cd0e27171905086ba733f236562d87e1ce656cc1f1a9cf383","sha256:e4582c6d77115f83d856109e1bf253f87311621b9d08d2994f4a381e5f59ec09"],"state_sha256":"67b6a6307ff97fd303812020cca116a50bc32abe22fabe8232e8711234152210"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/k9OpccUMRtZ33aCn1LqP4HgAqaAMHC9PYteNbxOCVwLvimO1MuJMjDA+TX04K5NI8Gmmx2ZZNj3HVQ6DK6VCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T19:34:53.336224Z","bundle_sha256":"7fbea2f5f52f1b8f4f3fa0663726accfde0c71acaf39516cbcf75772aa2dd91d"}}