{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:34TUCEQQG3FFWV4LZ2V5FKHKXF","short_pith_number":"pith:34TUCEQQ","canonical_record":{"source":{"id":"1304.2475","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2013-04-09T07:24:14Z","cross_cats_sorted":[],"title_canon_sha256":"ace75b74d15a7cb74c7a8e04218a9c3da5871ec82befdb2f056dda19e888c159","abstract_canon_sha256":"bfaeff1d85ea5edc242c9a9f5891b54d4d827b340c2895f244def904feb393ff"},"schema_version":"1.0"},"canonical_sha256":"df2741121036ca5b578bceabd2a8eab967ec2ebdb17e0a2f14c6b1e2b3c5d2d2","source":{"kind":"arxiv","id":"1304.2475","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.2475","created_at":"2026-05-18T00:58:17Z"},{"alias_kind":"arxiv_version","alias_value":"1304.2475v1","created_at":"2026-05-18T00:58:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2475","created_at":"2026-05-18T00:58:17Z"},{"alias_kind":"pith_short_12","alias_value":"34TUCEQQG3FF","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"34TUCEQQG3FFWV4L","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"34TUCEQQ","created_at":"2026-05-18T12:27:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:34TUCEQQG3FFWV4LZ2V5FKHKXF","target":"record","payload":{"canonical_record":{"source":{"id":"1304.2475","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2013-04-09T07:24:14Z","cross_cats_sorted":[],"title_canon_sha256":"ace75b74d15a7cb74c7a8e04218a9c3da5871ec82befdb2f056dda19e888c159","abstract_canon_sha256":"bfaeff1d85ea5edc242c9a9f5891b54d4d827b340c2895f244def904feb393ff"},"schema_version":"1.0"},"canonical_sha256":"df2741121036ca5b578bceabd2a8eab967ec2ebdb17e0a2f14c6b1e2b3c5d2d2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:58:17.417690Z","signature_b64":"u+i7TlBaRXghxgvb1ELIVdgYApiyGSkYfRRyoOZuY8pdHC2D2lmEpX8MGPSMegnm/J/CMTk/RX7NpPWPo1KFBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"df2741121036ca5b578bceabd2a8eab967ec2ebdb17e0a2f14c6b1e2b3c5d2d2","last_reissued_at":"2026-05-18T00:58:17.416873Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:58:17.416873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1304.2475","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":"2026-05-18T00:58:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9u0KyShSUW7lZ8uSv2ke3c4qwE1Dx6E4t3mKHTxpDh+2V2H0SHXTvISsZwG/UwEUTuvxuaplmpHrDqOqwWGNBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:42:08.197139Z"},"content_sha256":"ea41e3b9bd7c65302848071c9c105bc9feff659b3c539f7b2c51daf71e80612a","schema_version":"1.0","event_id":"sha256:ea41e3b9bd7c65302848071c9c105bc9feff659b3c539f7b2c51daf71e80612a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:34TUCEQQG3FFWV4LZ2V5FKHKXF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Design and Development of a Heart Rate Measuring Device using Fingertip","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.OH","authors_text":"Md. Abdul Kader, Md. Abu Sayed, M.M.A. Hashem, Rushdi Shams","submitted_at":"2013-04-09T07:24:14Z","abstract_excerpt":"In this paper, we presented the design and development of a new integrated device for measuring heart rate using fingertip to improve estimating the heart rate. As heart related diseases are increasing day by day, the need for an accurate and affordable heart rate measuring device or heart monitor is essential to ensure quality of health. However, most heart rate measuring tools and environments are expensive and do not follow ergonomics. Our proposed Heart Rate Measuring (HRM) device is economical and user friendly and uses optical technology to detect the flow of blood through index finger. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2475","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":""},"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":"2026-05-18T00:58:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FxkA8bXnitmRir5CSnyqZ5FQ53UdJK/sWntKzS2qUXZRWkh5gsVAbHpiFNDCtEAsOglDSiCQfhDMgH5/vnbtBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:42:08.197611Z"},"content_sha256":"c6ce7dba08004f26a2d0689bb76c76555a777a8e2f7887ccf6b86fe3d5a0e1ce","schema_version":"1.0","event_id":"sha256:c6ce7dba08004f26a2d0689bb76c76555a777a8e2f7887ccf6b86fe3d5a0e1ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/34TUCEQQG3FFWV4LZ2V5FKHKXF/bundle.json","state_url":"https://pith.science/pith/34TUCEQQG3FFWV4LZ2V5FKHKXF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/34TUCEQQG3FFWV4LZ2V5FKHKXF/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":"2026-05-27T03:42:08Z","links":{"resolver":"https://pith.science/pith/34TUCEQQG3FFWV4LZ2V5FKHKXF","bundle":"https://pith.science/pith/34TUCEQQG3FFWV4LZ2V5FKHKXF/bundle.json","state":"https://pith.science/pith/34TUCEQQG3FFWV4LZ2V5FKHKXF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/34TUCEQQG3FFWV4LZ2V5FKHKXF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:34TUCEQQG3FFWV4LZ2V5FKHKXF","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":"bfaeff1d85ea5edc242c9a9f5891b54d4d827b340c2895f244def904feb393ff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2013-04-09T07:24:14Z","title_canon_sha256":"ace75b74d15a7cb74c7a8e04218a9c3da5871ec82befdb2f056dda19e888c159"},"schema_version":"1.0","source":{"id":"1304.2475","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.2475","created_at":"2026-05-18T00:58:17Z"},{"alias_kind":"arxiv_version","alias_value":"1304.2475v1","created_at":"2026-05-18T00:58:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.2475","created_at":"2026-05-18T00:58:17Z"},{"alias_kind":"pith_short_12","alias_value":"34TUCEQQG3FF","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"34TUCEQQG3FFWV4L","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"34TUCEQQ","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:c6ce7dba08004f26a2d0689bb76c76555a777a8e2f7887ccf6b86fe3d5a0e1ce","target":"graph","created_at":"2026-05-18T00:58:17Z","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":"In this paper, we presented the design and development of a new integrated device for measuring heart rate using fingertip to improve estimating the heart rate. As heart related diseases are increasing day by day, the need for an accurate and affordable heart rate measuring device or heart monitor is essential to ensure quality of health. However, most heart rate measuring tools and environments are expensive and do not follow ergonomics. Our proposed Heart Rate Measuring (HRM) device is economical and user friendly and uses optical technology to detect the flow of blood through index finger. ","authors_text":"Md. Abdul Kader, Md. Abu Sayed, M.M.A. Hashem, Rushdi Shams","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2013-04-09T07:24:14Z","title":"Design and Development of a Heart Rate Measuring Device using Fingertip"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.2475","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:ea41e3b9bd7c65302848071c9c105bc9feff659b3c539f7b2c51daf71e80612a","target":"record","created_at":"2026-05-18T00:58:17Z","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":"bfaeff1d85ea5edc242c9a9f5891b54d4d827b340c2895f244def904feb393ff","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.OH","submitted_at":"2013-04-09T07:24:14Z","title_canon_sha256":"ace75b74d15a7cb74c7a8e04218a9c3da5871ec82befdb2f056dda19e888c159"},"schema_version":"1.0","source":{"id":"1304.2475","kind":"arxiv","version":1}},"canonical_sha256":"df2741121036ca5b578bceabd2a8eab967ec2ebdb17e0a2f14c6b1e2b3c5d2d2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"df2741121036ca5b578bceabd2a8eab967ec2ebdb17e0a2f14c6b1e2b3c5d2d2","first_computed_at":"2026-05-18T00:58:17.416873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:17.416873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u+i7TlBaRXghxgvb1ELIVdgYApiyGSkYfRRyoOZuY8pdHC2D2lmEpX8MGPSMegnm/J/CMTk/RX7NpPWPo1KFBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:17.417690Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.2475","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ea41e3b9bd7c65302848071c9c105bc9feff659b3c539f7b2c51daf71e80612a","sha256:c6ce7dba08004f26a2d0689bb76c76555a777a8e2f7887ccf6b86fe3d5a0e1ce"],"state_sha256":"19a3f721f3b86c2be10fde50d49fb686f88cb13aa619c4c64f31fe2e87817cb7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"waJleDzlMxpp9EKdqFUz/V8lI2MM6Pk3jEmNusGZ9FHBMfEbnyXGG8V/CvzemBzZFtPPIKpR1ptLJofpjcaGBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T03:42:08.200163Z","bundle_sha256":"4e05a3398b17d76ff5e8d5647e9f85181d504aecac9191944aadf88810d506d0"}}