{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:ZRAUEM64CNXH7YRWHORA5PWE2U","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":"487618d4df4525efc61d2a29404afc9133d88e076c92115db5f5734c2d9a7573","cross_cats_sorted":["stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2026-06-06T17:16:37Z","title_canon_sha256":"b5e6fe1a4695ef9d97234fc15ce2f591be9f2beca8ad0a67c4797fc2c8e0fe44"},"schema_version":"1.0","source":{"id":"2606.08261","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.08261","created_at":"2026-06-09T01:05:31Z"},{"alias_kind":"arxiv_version","alias_value":"2606.08261v1","created_at":"2026-06-09T01:05:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.08261","created_at":"2026-06-09T01:05:31Z"},{"alias_kind":"pith_short_12","alias_value":"ZRAUEM64CNXH","created_at":"2026-06-09T01:05:31Z"},{"alias_kind":"pith_short_16","alias_value":"ZRAUEM64CNXH7YRW","created_at":"2026-06-09T01:05:31Z"},{"alias_kind":"pith_short_8","alias_value":"ZRAUEM64","created_at":"2026-06-09T01:05:31Z"}],"graph_snapshots":[{"event_id":"sha256:7d06dcf7093e957200bbcf4041acb38dd3eb35520b850b5fda15728a6e170407","target":"graph","created_at":"2026-06-09T01:05:31Z","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/2606.08261/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Accurately monitoring mental fatigue is critical for improving workplace safety and productivity. A recent study examined unobtrusively collected smartphone typing speed as a potential ambulatory proxy assessment of mental fatigue using data from the Intern Health Study (IHS). While population-level average typing speed patterns were found to be consistent with validated measures of mental fatigue, how these trajectories vary across participants and days may inform opportune moments for just-in-time interventions and remains an open question. Treating typing speed trajectories as sparsely obse","authors_text":"Erjia Cui, Nidhi Pai, Srijan Sen, Yu Fang, Zhenke Wu","cross_cats":["stat.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2026-06-06T17:16:37Z","title":"Sparse Longitudinal Functional Principal Component Analysis for Episodic Ambulatory Behavioral Assessments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.08261","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":"sha256:54d8346f98c9728d9217b98df5a149658df42b61b94e4edb2340b9448628d78c","target":"record","created_at":"2026-06-09T01:05:31Z","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":"487618d4df4525efc61d2a29404afc9133d88e076c92115db5f5734c2d9a7573","cross_cats_sorted":["stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.ME","submitted_at":"2026-06-06T17:16:37Z","title_canon_sha256":"b5e6fe1a4695ef9d97234fc15ce2f591be9f2beca8ad0a67c4797fc2c8e0fe44"},"schema_version":"1.0","source":{"id":"2606.08261","kind":"arxiv","version":1}},"canonical_sha256":"cc414233dc136e7fe2363ba20ebec4d51b55e2102f636538422f4d0a0a6b0aa6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc414233dc136e7fe2363ba20ebec4d51b55e2102f636538422f4d0a0a6b0aa6","first_computed_at":"2026-06-09T01:05:31.684634Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-09T01:05:31.684634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fWu+T/DllqaxB+RHHI2ZuJmfvZatAN4UhjJwVl2Wa/rircIsMd6TDzVDUzEnr2KpWTvoPqkf0lbqkPi7s5ALDQ==","signature_status":"signed_v1","signed_at":"2026-06-09T01:05:31.685148Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.08261","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:54d8346f98c9728d9217b98df5a149658df42b61b94e4edb2340b9448628d78c","sha256:7d06dcf7093e957200bbcf4041acb38dd3eb35520b850b5fda15728a6e170407"],"state_sha256":"cdfd93a98a615d882b7d360b8a55bc601f4ce7d877cf5a2d8eecc32ff17173b0"}