{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:NZ34JSAZLVCKJF674DARCB4MXO","short_pith_number":"pith:NZ34JSAZ","canonical_record":{"source":{"id":"1809.07692","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-31T07:25:20Z","cross_cats_sorted":["cs.NE"],"title_canon_sha256":"9e4f2be37fd3279a6a90611502e87f2d1fc2665a23205f0a2bd9ae16c5f02f14","abstract_canon_sha256":"b0f2d2022643bbd5631a07cbcd1ce73bbecd1a309b20e3de471f7aab11b91c9f"},"schema_version":"1.0"},"canonical_sha256":"6e77c4c8195d44a497dfe0c111078cbbbe50c3231e01fda8eaacc2ae9bfa72c3","source":{"kind":"arxiv","id":"1809.07692","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.07692","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"arxiv_version","alias_value":"1809.07692v2","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.07692","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"pith_short_12","alias_value":"NZ34JSAZLVCK","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NZ34JSAZLVCKJF67","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NZ34JSAZ","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:NZ34JSAZLVCKJF674DARCB4MXO","target":"record","payload":{"canonical_record":{"source":{"id":"1809.07692","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-31T07:25:20Z","cross_cats_sorted":["cs.NE"],"title_canon_sha256":"9e4f2be37fd3279a6a90611502e87f2d1fc2665a23205f0a2bd9ae16c5f02f14","abstract_canon_sha256":"b0f2d2022643bbd5631a07cbcd1ce73bbecd1a309b20e3de471f7aab11b91c9f"},"schema_version":"1.0"},"canonical_sha256":"6e77c4c8195d44a497dfe0c111078cbbbe50c3231e01fda8eaacc2ae9bfa72c3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:53:57.501928Z","signature_b64":"TXOnnhu7czaptXCltWk9Lrs+CSQbCi4QhxFYtPotkIZqzM7HUao31KT8rKs9NfBNXzFZxV6wzl1zxj0wjUwkAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6e77c4c8195d44a497dfe0c111078cbbbe50c3231e01fda8eaacc2ae9bfa72c3","last_reissued_at":"2026-05-17T23:53:57.501222Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:53:57.501222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.07692","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":"2026-05-17T23:53:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"88vWEGJFpqyrrCIuTMrCw7D4ShS1+XEYGQIhuN6xYt9SkBheotAsg5sZXkSu65Y+7olzITdGIqyOgBf4s1LDAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T05:00:33.340816Z"},"content_sha256":"75a99ddc17935fb5bb23223e539b687eb22711699ddc7918275b10d41249abb7","schema_version":"1.0","event_id":"sha256:75a99ddc17935fb5bb23223e539b687eb22711699ddc7918275b10d41249abb7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:NZ34JSAZLVCKJF674DARCB4MXO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Staying Alive - CPR Quality Parameters from Wrist-worn Inertial Sensor Data with Evolutionary Fitted Sinusoidal Models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.NE"],"primary_cat":"physics.med-ph","authors_text":"Andreas Hein, Andreas Klausen, Christian Lins, Sandra Hellmers, Sebastian Fudickar","submitted_at":"2018-08-31T07:25:20Z","abstract_excerpt":"In this paper, a robust sinusoidal model fitting method based on the Differential Evolution (DE) algorithm for determining cardiopulmonary resuscitation (CPR) quality-parameters - naming chest compression frequency and depth - as measured by an inertial sensor placed at the wrist is presented. Once included into a smartphone or smartwatch app, the proposed algorithm will enable bystanders to improve CPR (as part of a continuous closed-loop support-system). By evaluating the precision of the model with data recorded by a Laerdal Resusci Anne mannequin as reference standard, a low variance for c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.07692","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":""},"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":"2026-05-17T23:53:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aaiu663m8j4f91ySJjzampyJsctVn4wNam3Bsq4odU1nDJWEMSlQf3gzKcaVbXXuzvknc5mPQsZx8JnAbEsHDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T05:00:33.341145Z"},"content_sha256":"1923ffa175235ebcce18ab993c7c508685c45e65adea42c9c7041f548c3b61ef","schema_version":"1.0","event_id":"sha256:1923ffa175235ebcce18ab993c7c508685c45e65adea42c9c7041f548c3b61ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NZ34JSAZLVCKJF674DARCB4MXO/bundle.json","state_url":"https://pith.science/pith/NZ34JSAZLVCKJF674DARCB4MXO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NZ34JSAZLVCKJF674DARCB4MXO/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":"2026-07-02T05:00:33Z","links":{"resolver":"https://pith.science/pith/NZ34JSAZLVCKJF674DARCB4MXO","bundle":"https://pith.science/pith/NZ34JSAZLVCKJF674DARCB4MXO/bundle.json","state":"https://pith.science/pith/NZ34JSAZLVCKJF674DARCB4MXO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NZ34JSAZLVCKJF674DARCB4MXO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NZ34JSAZLVCKJF674DARCB4MXO","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":"b0f2d2022643bbd5631a07cbcd1ce73bbecd1a309b20e3de471f7aab11b91c9f","cross_cats_sorted":["cs.NE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-31T07:25:20Z","title_canon_sha256":"9e4f2be37fd3279a6a90611502e87f2d1fc2665a23205f0a2bd9ae16c5f02f14"},"schema_version":"1.0","source":{"id":"1809.07692","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.07692","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"arxiv_version","alias_value":"1809.07692v2","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.07692","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"pith_short_12","alias_value":"NZ34JSAZLVCK","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NZ34JSAZLVCKJF67","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NZ34JSAZ","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:1923ffa175235ebcce18ab993c7c508685c45e65adea42c9c7041f548c3b61ef","target":"graph","created_at":"2026-05-17T23:53:57Z","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, a robust sinusoidal model fitting method based on the Differential Evolution (DE) algorithm for determining cardiopulmonary resuscitation (CPR) quality-parameters - naming chest compression frequency and depth - as measured by an inertial sensor placed at the wrist is presented. Once included into a smartphone or smartwatch app, the proposed algorithm will enable bystanders to improve CPR (as part of a continuous closed-loop support-system). By evaluating the precision of the model with data recorded by a Laerdal Resusci Anne mannequin as reference standard, a low variance for c","authors_text":"Andreas Hein, Andreas Klausen, Christian Lins, Sandra Hellmers, Sebastian Fudickar","cross_cats":["cs.NE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-31T07:25:20Z","title":"Staying Alive - CPR Quality Parameters from Wrist-worn Inertial Sensor Data with Evolutionary Fitted Sinusoidal Models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.07692","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":"sha256:75a99ddc17935fb5bb23223e539b687eb22711699ddc7918275b10d41249abb7","target":"record","created_at":"2026-05-17T23:53:57Z","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":"b0f2d2022643bbd5631a07cbcd1ce73bbecd1a309b20e3de471f7aab11b91c9f","cross_cats_sorted":["cs.NE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-31T07:25:20Z","title_canon_sha256":"9e4f2be37fd3279a6a90611502e87f2d1fc2665a23205f0a2bd9ae16c5f02f14"},"schema_version":"1.0","source":{"id":"1809.07692","kind":"arxiv","version":2}},"canonical_sha256":"6e77c4c8195d44a497dfe0c111078cbbbe50c3231e01fda8eaacc2ae9bfa72c3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6e77c4c8195d44a497dfe0c111078cbbbe50c3231e01fda8eaacc2ae9bfa72c3","first_computed_at":"2026-05-17T23:53:57.501222Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:57.501222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TXOnnhu7czaptXCltWk9Lrs+CSQbCi4QhxFYtPotkIZqzM7HUao31KT8rKs9NfBNXzFZxV6wzl1zxj0wjUwkAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:57.501928Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.07692","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:75a99ddc17935fb5bb23223e539b687eb22711699ddc7918275b10d41249abb7","sha256:1923ffa175235ebcce18ab993c7c508685c45e65adea42c9c7041f548c3b61ef"],"state_sha256":"4a2114cc7be8c1c9fce52ed999e5e38d1763aa808aa845cd76b8729bf572d36b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GaWx03cMouEmXTZnsk5wgGQxwchdWkK2pRr0uQA8Db6QyNwFeMwWX9uDV6+O4fCiiTaR9JO8ydke78pI2GZuBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T05:00:33.342968Z","bundle_sha256":"b09c6bf8150be88abc0bfd1b4a3dcb4cc79ff01c0430e25aeec8bb3e19dc82aa"}}