{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:IKZM22GEEP7CIQLAPLGRFYPHY7","short_pith_number":"pith:IKZM22GE","canonical_record":{"source":{"id":"2105.10812","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2021-05-22T21:29:51Z","cross_cats_sorted":[],"title_canon_sha256":"47ceb380d9f1eb1d3c73618352042ef3a11a33c66191883988d37152e50bdb26","abstract_canon_sha256":"356917b1a797d8beb6c637f88634610f6eb2b68ac36ac397bd2741e04013429d"},"schema_version":"1.0"},"canonical_sha256":"42b2cd68c423fe2441607acd12e1e7c7f4dfa5fa60c0b8904bae57ad93ad80b2","source":{"kind":"arxiv","id":"2105.10812","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.10812","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"arxiv_version","alias_value":"2105.10812v2","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.10812","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"pith_short_12","alias_value":"IKZM22GEEP7C","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"pith_short_16","alias_value":"IKZM22GEEP7CIQLA","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"pith_short_8","alias_value":"IKZM22GE","created_at":"2026-07-05T08:10:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:IKZM22GEEP7CIQLAPLGRFYPHY7","target":"record","payload":{"canonical_record":{"source":{"id":"2105.10812","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2021-05-22T21:29:51Z","cross_cats_sorted":[],"title_canon_sha256":"47ceb380d9f1eb1d3c73618352042ef3a11a33c66191883988d37152e50bdb26","abstract_canon_sha256":"356917b1a797d8beb6c637f88634610f6eb2b68ac36ac397bd2741e04013429d"},"schema_version":"1.0"},"canonical_sha256":"42b2cd68c423fe2441607acd12e1e7c7f4dfa5fa60c0b8904bae57ad93ad80b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:10:09.546572Z","signature_b64":"4FMahl8X0qK6Kity4oaEAairR9y0dI2zbxt3Oo2ZW95NumGtAn0umWfMXH9/OhA/GoxREWXlsjZzcdUk75cgCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"42b2cd68c423fe2441607acd12e1e7c7f4dfa5fa60c0b8904bae57ad93ad80b2","last_reissued_at":"2026-07-05T08:10:09.546182Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:10:09.546182Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.10812","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":"2026-07-05T08:10:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U/uy/GmQaCpgyfLhlO9U0RPijkPSSWlIZ/Fl42ziltMvWPShk+IRzgh0wcfWd5Q3X9NFl6/pPT50sYp9e0G3Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-15T21:39:29.558387Z"},"content_sha256":"872cd08226d22cc5e78066426111652d58d8640b5eaec5e035787ab0fd1e5e11","schema_version":"1.0","event_id":"sha256:872cd08226d22cc5e78066426111652d58d8640b5eaec5e035787ab0fd1e5e11"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:IKZM22GEEP7CIQLAPLGRFYPHY7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Active extensile stress promotes 3D director orientations and flows","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Julia M. Yeomans, Mehrana R. Nejad","submitted_at":"2021-05-22T21:29:51Z","abstract_excerpt":"We use numerical simulations and linear stability analysis to study an active nematic layer where the director is allowed to point out of the plane. Our results highlight the difference between extensile and contractile systems. Contractile stress suppresses the flows perpendicular to the layer and favours in-plane orientations of the director. By contrast, extensile stress promotes instabilities that can turn the director out of the plane, leaving behind a population of distinct, in-plane regions that continually elongate and divide. This supports extensile forces as a mechanism for the initi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.10812","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/2105.10812/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":"2026-07-05T08:10:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"63SD6CyipSuVPT7YR5rvfh8x9gV7P7zeT0/cvuCgaD03wkItS+KcPZiSz6B+ph7qEoZi0lw7QLwGLUMsX+riAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-15T21:39:29.558767Z"},"content_sha256":"4810e136bd7e45fe0eb497df436a9802abd1a71cc7e4d57d0c7d4857acc56b8d","schema_version":"1.0","event_id":"sha256:4810e136bd7e45fe0eb497df436a9802abd1a71cc7e4d57d0c7d4857acc56b8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IKZM22GEEP7CIQLAPLGRFYPHY7/bundle.json","state_url":"https://pith.science/pith/IKZM22GEEP7CIQLAPLGRFYPHY7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IKZM22GEEP7CIQLAPLGRFYPHY7/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":"2026-07-15T21:39:29Z","links":{"resolver":"https://pith.science/pith/IKZM22GEEP7CIQLAPLGRFYPHY7","bundle":"https://pith.science/pith/IKZM22GEEP7CIQLAPLGRFYPHY7/bundle.json","state":"https://pith.science/pith/IKZM22GEEP7CIQLAPLGRFYPHY7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IKZM22GEEP7CIQLAPLGRFYPHY7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:IKZM22GEEP7CIQLAPLGRFYPHY7","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":"356917b1a797d8beb6c637f88634610f6eb2b68ac36ac397bd2741e04013429d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2021-05-22T21:29:51Z","title_canon_sha256":"47ceb380d9f1eb1d3c73618352042ef3a11a33c66191883988d37152e50bdb26"},"schema_version":"1.0","source":{"id":"2105.10812","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.10812","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"arxiv_version","alias_value":"2105.10812v2","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.10812","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"pith_short_12","alias_value":"IKZM22GEEP7C","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"pith_short_16","alias_value":"IKZM22GEEP7CIQLA","created_at":"2026-07-05T08:10:09Z"},{"alias_kind":"pith_short_8","alias_value":"IKZM22GE","created_at":"2026-07-05T08:10:09Z"}],"graph_snapshots":[{"event_id":"sha256:4810e136bd7e45fe0eb497df436a9802abd1a71cc7e4d57d0c7d4857acc56b8d","target":"graph","created_at":"2026-07-05T08:10:09Z","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/2105.10812/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use numerical simulations and linear stability analysis to study an active nematic layer where the director is allowed to point out of the plane. Our results highlight the difference between extensile and contractile systems. Contractile stress suppresses the flows perpendicular to the layer and favours in-plane orientations of the director. By contrast, extensile stress promotes instabilities that can turn the director out of the plane, leaving behind a population of distinct, in-plane regions that continually elongate and divide. This supports extensile forces as a mechanism for the initi","authors_text":"Julia M. Yeomans, Mehrana R. Nejad","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2021-05-22T21:29:51Z","title":"Active extensile stress promotes 3D director orientations and flows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.10812","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":"sha256:872cd08226d22cc5e78066426111652d58d8640b5eaec5e035787ab0fd1e5e11","target":"record","created_at":"2026-07-05T08:10:09Z","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":"356917b1a797d8beb6c637f88634610f6eb2b68ac36ac397bd2741e04013429d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2021-05-22T21:29:51Z","title_canon_sha256":"47ceb380d9f1eb1d3c73618352042ef3a11a33c66191883988d37152e50bdb26"},"schema_version":"1.0","source":{"id":"2105.10812","kind":"arxiv","version":2}},"canonical_sha256":"42b2cd68c423fe2441607acd12e1e7c7f4dfa5fa60c0b8904bae57ad93ad80b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42b2cd68c423fe2441607acd12e1e7c7f4dfa5fa60c0b8904bae57ad93ad80b2","first_computed_at":"2026-07-05T08:10:09.546182Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:10:09.546182Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4FMahl8X0qK6Kity4oaEAairR9y0dI2zbxt3Oo2ZW95NumGtAn0umWfMXH9/OhA/GoxREWXlsjZzcdUk75cgCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:10:09.546572Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.10812","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:872cd08226d22cc5e78066426111652d58d8640b5eaec5e035787ab0fd1e5e11","sha256:4810e136bd7e45fe0eb497df436a9802abd1a71cc7e4d57d0c7d4857acc56b8d"],"state_sha256":"590b4e0c88c048803ffa5e1f9e7735b6c54bcd5cdc39e030d862d3cc66a04864"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1PmjD6ekI5yxun6MMTILE3Fzau15lGRFKnw8anuiFwVDp0+rVHCk5l6eKFVK2vu/+Bm2AvEDfmcqbiWUuZBUCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-15T21:39:29.561341Z","bundle_sha256":"2c339414efda1037ee1244493cb14536286a892d71098c772e9d204e969c97b5"}}