{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:3XIEVWS5FTAVCTRME73QQN22WT","short_pith_number":"pith:3XIEVWS5","canonical_record":{"source":{"id":"2308.06860","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-08-13T23:26:36Z","cross_cats_sorted":[],"title_canon_sha256":"f54f93348769b6bb866fd0c6b6d1420706bea92f1eee63d8991240fdd850113a","abstract_canon_sha256":"0c3cdf12597f348086a8c2d6c104839228616275245a58ef461fcc3be0160bca"},"schema_version":"1.0"},"canonical_sha256":"ddd04ada5d2cc1514e2c27f708375ab4d3cfc44602c387d4eb363dbfaff389f9","source":{"kind":"arxiv","id":"2308.06860","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.06860","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"arxiv_version","alias_value":"2308.06860v1","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.06860","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"pith_short_12","alias_value":"3XIEVWS5FTAV","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"pith_short_16","alias_value":"3XIEVWS5FTAVCTRM","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"pith_short_8","alias_value":"3XIEVWS5","created_at":"2026-07-05T06:40:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:3XIEVWS5FTAVCTRME73QQN22WT","target":"record","payload":{"canonical_record":{"source":{"id":"2308.06860","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-08-13T23:26:36Z","cross_cats_sorted":[],"title_canon_sha256":"f54f93348769b6bb866fd0c6b6d1420706bea92f1eee63d8991240fdd850113a","abstract_canon_sha256":"0c3cdf12597f348086a8c2d6c104839228616275245a58ef461fcc3be0160bca"},"schema_version":"1.0"},"canonical_sha256":"ddd04ada5d2cc1514e2c27f708375ab4d3cfc44602c387d4eb363dbfaff389f9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:40:46.094696Z","signature_b64":"4mTP3eBsbpgfTOCNTzjygjHyOSW5tn5WiWvLeczKUaW3o8bZ+hjs4TyAnmc0+jf4V6qKC2r5Wg7MmCt2ARisCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ddd04ada5d2cc1514e2c27f708375ab4d3cfc44602c387d4eb363dbfaff389f9","last_reissued_at":"2026-07-05T06:40:46.094280Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:40:46.094280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2308.06860","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":"2026-07-05T06:40:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aWBz6AefDxzPKB4VqZxcJKq5F9RorK+wl0fAiynHPOLEC7SpkFqnTfyBQUBegzA6R8TWYu0dn1U7JJzdiEnEBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T04:51:46.457608Z"},"content_sha256":"d8a2bce1ba22bf15ee011e5539ee2d2266e0fae9527a7edb1b110871f64128bb","schema_version":"1.0","event_id":"sha256:d8a2bce1ba22bf15ee011e5539ee2d2266e0fae9527a7edb1b110871f64128bb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:3XIEVWS5FTAVCTRME73QQN22WT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Active nematics with deformable particles","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Ioannis Hadjifrangiskou, Julia M. Yeomans, Liam J. Ruske","submitted_at":"2023-08-13T23:26:36Z","abstract_excerpt":"The hydrodynamic theory of active nematics has been often used to describe the spatio-temporal dynamics of cell flows and motile topological defects within soft confluent tissues. Those theories, however, often rely on the assumption that tissues consist of cells with a fixed, anisotropic shape and do not resolve dynamical cell shape changes due to flow gradients. In this paper we extend the continuum theory of active nematics to include cell shape deformability. We find that circular cells in tissues must generate sufficient active stress to overcome an elastic barrier to deforming their shap"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.06860","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2308.06860/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":"2026-07-05T06:40:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G5g/W6yRVhZm8fGusnm4rVvfY7xNPJBdClxs3Bgo1iKHxMQLPIDM/znEfqmaiO5RLKsZxy7opsfTCC7/E8zqBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T04:51:46.457996Z"},"content_sha256":"8694ff6c5b67ea167606d98e1c6bf743c387db4002fc10db899142705d8005c4","schema_version":"1.0","event_id":"sha256:8694ff6c5b67ea167606d98e1c6bf743c387db4002fc10db899142705d8005c4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3XIEVWS5FTAVCTRME73QQN22WT/bundle.json","state_url":"https://pith.science/pith/3XIEVWS5FTAVCTRME73QQN22WT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3XIEVWS5FTAVCTRME73QQN22WT/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":"2026-07-07T04:51:46Z","links":{"resolver":"https://pith.science/pith/3XIEVWS5FTAVCTRME73QQN22WT","bundle":"https://pith.science/pith/3XIEVWS5FTAVCTRME73QQN22WT/bundle.json","state":"https://pith.science/pith/3XIEVWS5FTAVCTRME73QQN22WT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3XIEVWS5FTAVCTRME73QQN22WT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:3XIEVWS5FTAVCTRME73QQN22WT","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":"0c3cdf12597f348086a8c2d6c104839228616275245a58ef461fcc3be0160bca","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-08-13T23:26:36Z","title_canon_sha256":"f54f93348769b6bb866fd0c6b6d1420706bea92f1eee63d8991240fdd850113a"},"schema_version":"1.0","source":{"id":"2308.06860","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.06860","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"arxiv_version","alias_value":"2308.06860v1","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.06860","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"pith_short_12","alias_value":"3XIEVWS5FTAV","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"pith_short_16","alias_value":"3XIEVWS5FTAVCTRM","created_at":"2026-07-05T06:40:46Z"},{"alias_kind":"pith_short_8","alias_value":"3XIEVWS5","created_at":"2026-07-05T06:40:46Z"}],"graph_snapshots":[{"event_id":"sha256:8694ff6c5b67ea167606d98e1c6bf743c387db4002fc10db899142705d8005c4","target":"graph","created_at":"2026-07-05T06:40:46Z","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/2308.06860/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The hydrodynamic theory of active nematics has been often used to describe the spatio-temporal dynamics of cell flows and motile topological defects within soft confluent tissues. Those theories, however, often rely on the assumption that tissues consist of cells with a fixed, anisotropic shape and do not resolve dynamical cell shape changes due to flow gradients. In this paper we extend the continuum theory of active nematics to include cell shape deformability. We find that circular cells in tissues must generate sufficient active stress to overcome an elastic barrier to deforming their shap","authors_text":"Ioannis Hadjifrangiskou, Julia M. Yeomans, Liam J. Ruske","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-08-13T23:26:36Z","title":"Active nematics with deformable particles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.06860","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:d8a2bce1ba22bf15ee011e5539ee2d2266e0fae9527a7edb1b110871f64128bb","target":"record","created_at":"2026-07-05T06:40:46Z","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":"0c3cdf12597f348086a8c2d6c104839228616275245a58ef461fcc3be0160bca","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2023-08-13T23:26:36Z","title_canon_sha256":"f54f93348769b6bb866fd0c6b6d1420706bea92f1eee63d8991240fdd850113a"},"schema_version":"1.0","source":{"id":"2308.06860","kind":"arxiv","version":1}},"canonical_sha256":"ddd04ada5d2cc1514e2c27f708375ab4d3cfc44602c387d4eb363dbfaff389f9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ddd04ada5d2cc1514e2c27f708375ab4d3cfc44602c387d4eb363dbfaff389f9","first_computed_at":"2026-07-05T06:40:46.094280Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:40:46.094280Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4mTP3eBsbpgfTOCNTzjygjHyOSW5tn5WiWvLeczKUaW3o8bZ+hjs4TyAnmc0+jf4V6qKC2r5Wg7MmCt2ARisCg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:40:46.094696Z","signed_message":"canonical_sha256_bytes"},"source_id":"2308.06860","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8a2bce1ba22bf15ee011e5539ee2d2266e0fae9527a7edb1b110871f64128bb","sha256:8694ff6c5b67ea167606d98e1c6bf743c387db4002fc10db899142705d8005c4"],"state_sha256":"23921afeeb5c3e1102079d3d81f611b1899eb1c4fb0c6b5dd5a1d838c03de008"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L2jp3jSmYMioDuSkdthg/vlUaipTaf+XMgDZPHpog2+M9rY0/rlfBZBr0cC6DlqFahO+NVwJkQ0DJ/BnawYCCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T04:51:46.460397Z","bundle_sha256":"33b2f5517339382d1ff21a9b46e464c449bfc52b6847452d8028dc9b5f13c693"}}