{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:5CIBSPCV7UHQJQGBSITGUSVLZB","short_pith_number":"pith:5CIBSPCV","canonical_record":{"source":{"id":"2312.11756","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-12-18T23:52:40Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"0a11a2b1c72d02370c38fd062665c5d76cc725d00b75ffe5e63771216abbc8a4","abstract_canon_sha256":"6017ac2dc2854062c31e6c5a61a056c35006799166084b0f19efb9f89e0eb523"},"schema_version":"1.0"},"canonical_sha256":"e890193c55fd0f04c0c192266a4aabc85a99427dbbcaa3040805a5891f9ef2ec","source":{"kind":"arxiv","id":"2312.11756","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2312.11756","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"arxiv_version","alias_value":"2312.11756v3","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2312.11756","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"pith_short_12","alias_value":"5CIBSPCV7UHQ","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"pith_short_16","alias_value":"5CIBSPCV7UHQJQGB","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"pith_short_8","alias_value":"5CIBSPCV","created_at":"2026-07-05T09:49:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:5CIBSPCV7UHQJQGBSITGUSVLZB","target":"record","payload":{"canonical_record":{"source":{"id":"2312.11756","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-12-18T23:52:40Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"0a11a2b1c72d02370c38fd062665c5d76cc725d00b75ffe5e63771216abbc8a4","abstract_canon_sha256":"6017ac2dc2854062c31e6c5a61a056c35006799166084b0f19efb9f89e0eb523"},"schema_version":"1.0"},"canonical_sha256":"e890193c55fd0f04c0c192266a4aabc85a99427dbbcaa3040805a5891f9ef2ec","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:49:01.741855Z","signature_b64":"MjO1oauCOms7Il5GyqQbnamaqz2RLfIaMsmsQEMS3FYDBqruv+8lQGjKQtp6IcOyphE2f/aCVfW/w3HaSW3+BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e890193c55fd0f04c0c192266a4aabc85a99427dbbcaa3040805a5891f9ef2ec","last_reissued_at":"2026-07-05T09:49:01.741301Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:49:01.741301Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2312.11756","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":"2026-07-05T09:49:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Vptt7WAIPKyR5Zk1vHVsAfw2vP+rxL3whDUk4+cuj9OfMeWGQQmAUNcvpADJexCbQK/UKeLMH2qMVuqmD3lcDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T05:56:22.473439Z"},"content_sha256":"c0ec9aeeb7ffe6b6fd5c2bd73eba542308eaad7f62f4620f2dd93892c2a15e0e","schema_version":"1.0","event_id":"sha256:c0ec9aeeb7ffe6b6fd5c2bd73eba542308eaad7f62f4620f2dd93892c2a15e0e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:5CIBSPCV7UHQJQGBSITGUSVLZB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Vertex model with internal dissipation enables sustained flows","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph"],"primary_cat":"cond-mat.soft","authors_text":"Chaithanya K. V. S., Jan Rozman, Julia M. Yeomans, Rastko Sknepnek","submitted_at":"2023-12-18T23:52:40Z","abstract_excerpt":"Complex tissue flows in epithelia are driven by intra- and inter-cellular processes that generate, maintain, and coordinate mechanical forces. There has been growing evidence that cell shape anisotropy, manifested as nematic order, plays an important role in this process. Here we extend an active nematic vertex model by replacing substrate friction with internal viscous dissipation, dominant in epithelia not supported by a substrate or the extracellular matrix, which are found in many early-stage embryos. When coupled to cell shape anisotropy, the internal viscous dissipation allows for long-r"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2312.11756","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/2312.11756/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":"2026-07-05T09:49:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zMo7PzStOa5+SHPkxqw8ZQGLDTmMtph+8AKtlKBmnj4UVX1EA5hHCHxPcW0tgfEUq0rxJD0Ic40hl6zq4zeoBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T05:56:22.473964Z"},"content_sha256":"5168ff9c07bf1ca4d4b62612b8d0d5c0ed0ded212ba0cca23e013049550349da","schema_version":"1.0","event_id":"sha256:5168ff9c07bf1ca4d4b62612b8d0d5c0ed0ded212ba0cca23e013049550349da"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5CIBSPCV7UHQJQGBSITGUSVLZB/bundle.json","state_url":"https://pith.science/pith/5CIBSPCV7UHQJQGBSITGUSVLZB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5CIBSPCV7UHQJQGBSITGUSVLZB/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":"2026-08-22T05:56:22Z","links":{"resolver":"https://pith.science/pith/5CIBSPCV7UHQJQGBSITGUSVLZB","bundle":"https://pith.science/pith/5CIBSPCV7UHQJQGBSITGUSVLZB/bundle.json","state":"https://pith.science/pith/5CIBSPCV7UHQJQGBSITGUSVLZB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5CIBSPCV7UHQJQGBSITGUSVLZB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:5CIBSPCV7UHQJQGBSITGUSVLZB","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":"6017ac2dc2854062c31e6c5a61a056c35006799166084b0f19efb9f89e0eb523","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-12-18T23:52:40Z","title_canon_sha256":"0a11a2b1c72d02370c38fd062665c5d76cc725d00b75ffe5e63771216abbc8a4"},"schema_version":"1.0","source":{"id":"2312.11756","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2312.11756","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"arxiv_version","alias_value":"2312.11756v3","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2312.11756","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"pith_short_12","alias_value":"5CIBSPCV7UHQ","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"pith_short_16","alias_value":"5CIBSPCV7UHQJQGB","created_at":"2026-07-05T09:49:01Z"},{"alias_kind":"pith_short_8","alias_value":"5CIBSPCV","created_at":"2026-07-05T09:49:01Z"}],"graph_snapshots":[{"event_id":"sha256:5168ff9c07bf1ca4d4b62612b8d0d5c0ed0ded212ba0cca23e013049550349da","target":"graph","created_at":"2026-07-05T09:49:01Z","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/2312.11756/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Complex tissue flows in epithelia are driven by intra- and inter-cellular processes that generate, maintain, and coordinate mechanical forces. There has been growing evidence that cell shape anisotropy, manifested as nematic order, plays an important role in this process. Here we extend an active nematic vertex model by replacing substrate friction with internal viscous dissipation, dominant in epithelia not supported by a substrate or the extracellular matrix, which are found in many early-stage embryos. When coupled to cell shape anisotropy, the internal viscous dissipation allows for long-r","authors_text":"Chaithanya K. V. S., Jan Rozman, Julia M. Yeomans, Rastko Sknepnek","cross_cats":["physics.bio-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-12-18T23:52:40Z","title":"Vertex model with internal dissipation enables sustained flows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2312.11756","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:c0ec9aeeb7ffe6b6fd5c2bd73eba542308eaad7f62f4620f2dd93892c2a15e0e","target":"record","created_at":"2026-07-05T09:49:01Z","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":"6017ac2dc2854062c31e6c5a61a056c35006799166084b0f19efb9f89e0eb523","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-12-18T23:52:40Z","title_canon_sha256":"0a11a2b1c72d02370c38fd062665c5d76cc725d00b75ffe5e63771216abbc8a4"},"schema_version":"1.0","source":{"id":"2312.11756","kind":"arxiv","version":3}},"canonical_sha256":"e890193c55fd0f04c0c192266a4aabc85a99427dbbcaa3040805a5891f9ef2ec","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e890193c55fd0f04c0c192266a4aabc85a99427dbbcaa3040805a5891f9ef2ec","first_computed_at":"2026-07-05T09:49:01.741301Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:49:01.741301Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MjO1oauCOms7Il5GyqQbnamaqz2RLfIaMsmsQEMS3FYDBqruv+8lQGjKQtp6IcOyphE2f/aCVfW/w3HaSW3+BA==","signature_status":"signed_v1","signed_at":"2026-07-05T09:49:01.741855Z","signed_message":"canonical_sha256_bytes"},"source_id":"2312.11756","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c0ec9aeeb7ffe6b6fd5c2bd73eba542308eaad7f62f4620f2dd93892c2a15e0e","sha256:5168ff9c07bf1ca4d4b62612b8d0d5c0ed0ded212ba0cca23e013049550349da"],"state_sha256":"b42105afe8949b5475d6c7a725a5c2f65b5cdc58a61f856b7ca050ac08a12f79"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s8g4kTJ8HgW0cf4c6UHZPsW4bUcQt7gAqSVDLLw/dnhRIAGW+9Ij2KhhUlcVbOyHEqsxKUFYx/uETgBRbiG4Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T05:56:22.477676Z","bundle_sha256":"ae3947321b171a6189336ed88e0ea0019ab5fabd27ed5351f9de1f1f1b91b963"}}