{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:QVXE37OGEWRQCZNQZ3GU6XWAFK","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":"dd8748a7d002e4fc381a9e1f8c922b09e464b7d10dec6442d7d04e78bda403a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-07T01:16:04Z","title_canon_sha256":"7e53bdb3d8ca0aac370218ac8e759b098c2e205a4ac134b0c46301f8c072225f"},"schema_version":"1.0","source":{"id":"1905.02312","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.02312","created_at":"2026-05-17T23:46:51Z"},{"alias_kind":"arxiv_version","alias_value":"1905.02312v1","created_at":"2026-05-17T23:46:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.02312","created_at":"2026-05-17T23:46:51Z"},{"alias_kind":"pith_short_12","alias_value":"QVXE37OGEWRQ","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QVXE37OGEWRQCZNQ","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QVXE37OG","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:9530c95f22170db25e7bf57db67f114916330f3d0dc7d1b15f0bdb7289d8acc0","target":"graph","created_at":"2026-05-17T23:46:51Z","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"},"paper":{"abstract_excerpt":"This paper presents a novel approach based on pulse transit time (PTT) for the estimation of blood pressure (BP). In order to achieve this goal, a data acquisition hardware is designed for high-resolution sampling of phonocardiogram (PCG) and photoplethysmogram (PPG). These two signals can derive PTT values. Meanwhile, a force-sensing resistor (FSR) is placed under the cuff of the BP reference device to mark the moments of measurements accurately via recording instantaneous cuff pressure. For deriving the PTT-BP models, a calibration procedure including a supervised physical exercise is conduc","authors_text":"Amirhossein Esmaili, Mahdi Shabany, Mohammad Kachuee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-07T01:16:04Z","title":"Non-invasive Blood Pressure Estimation Using Phonocardiogram"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.02312","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":"sha256:1c2cdbb505a0ad7dab69c0464aa3f7326f032c80db90fd64159e7380080dccb0","target":"record","created_at":"2026-05-17T23:46:51Z","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":"dd8748a7d002e4fc381a9e1f8c922b09e464b7d10dec6442d7d04e78bda403a6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-05-07T01:16:04Z","title_canon_sha256":"7e53bdb3d8ca0aac370218ac8e759b098c2e205a4ac134b0c46301f8c072225f"},"schema_version":"1.0","source":{"id":"1905.02312","kind":"arxiv","version":1}},"canonical_sha256":"856e4dfdc625a30165b0cecd4f5ec02a91c29aa83eb0333ab3c51fa8aa6924f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"856e4dfdc625a30165b0cecd4f5ec02a91c29aa83eb0333ab3c51fa8aa6924f0","first_computed_at":"2026-05-17T23:46:51.803452Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:51.803452Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8dyEpWF4HkUKTSTLF8yhye2dsiPyPR5qQ3QKDpCqSxRPe+gbCwhpz9E32UlFqx+qJTK/tMBBWepzT6Up2fnMBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:51.804086Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.02312","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c2cdbb505a0ad7dab69c0464aa3f7326f032c80db90fd64159e7380080dccb0","sha256:9530c95f22170db25e7bf57db67f114916330f3d0dc7d1b15f0bdb7289d8acc0"],"state_sha256":"d0ac0ed381a02d2e99a4dc8772f69c3711644ba90924f0c186c66d4931960e65"}