{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:AFYGJVNGCU3LXYFFEI7ZK6X4LI","short_pith_number":"pith:AFYGJVNG","canonical_record":{"source":{"id":"1807.06767","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-07-18T03:58:46Z","cross_cats_sorted":["physics.med-ph"],"title_canon_sha256":"efc6d4d86a4c51b21040c8f7e180a8a665b610ed3a79fbbeb472048965a5060d","abstract_canon_sha256":"52d5e4e52ac3fd21dcb67a83e268d2b60295365f96c87d0413eff67a216bcee4"},"schema_version":"1.0"},"canonical_sha256":"017064d5a61536bbe0a5223f957afc5a37f7fae139efaa67fa15842276bf8ed9","source":{"kind":"arxiv","id":"1807.06767","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.06767","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1807.06767v1","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.06767","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"AFYGJVNGCU3L","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AFYGJVNGCU3LXYFF","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AFYGJVNG","created_at":"2026-05-18T12:32:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:AFYGJVNGCU3LXYFFEI7ZK6X4LI","target":"record","payload":{"canonical_record":{"source":{"id":"1807.06767","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-07-18T03:58:46Z","cross_cats_sorted":["physics.med-ph"],"title_canon_sha256":"efc6d4d86a4c51b21040c8f7e180a8a665b610ed3a79fbbeb472048965a5060d","abstract_canon_sha256":"52d5e4e52ac3fd21dcb67a83e268d2b60295365f96c87d0413eff67a216bcee4"},"schema_version":"1.0"},"canonical_sha256":"017064d5a61536bbe0a5223f957afc5a37f7fae139efaa67fa15842276bf8ed9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:10:25.847474Z","signature_b64":"T8EPPiY/gJP+z8W+L6WnHpKpN08r/SNpHqgtmESf6z1kq2tFg+zFhQboXvR+NndVz0RIYGFKuzq5fvmLBHpiAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"017064d5a61536bbe0a5223f957afc5a37f7fae139efaa67fa15842276bf8ed9","last_reissued_at":"2026-05-18T00:10:25.846816Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:10:25.846816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.06767","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":"2026-05-18T00:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3/XWaogdFbJvkf7xM0UiXqKnqWkYorGXz3fY7Pp++b64pRB4/uMJh7kJ58lGgDKX/7U6PAeUPiZEiuHuqnJ4BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:10:34.318171Z"},"content_sha256":"1d210f0df3b2243acff27cef28999ee007678636cef9850b4c96718aabb4cec3","schema_version":"1.0","event_id":"sha256:1d210f0df3b2243acff27cef28999ee007678636cef9850b4c96718aabb4cec3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:AFYGJVNGCU3LXYFFEI7ZK6X4LI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Comparing Respiratory Monitoring Performance of Commercial Wireless Devices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.med-ph"],"primary_cat":"eess.SP","authors_text":"Alemayehu Solomon Abrar, Anh Luong, Christina A. Porucznik, Jason Burch, Krishna Sundar, Neal Patwari, Peter Hillyard, Robert Farney, Sarah Hatch Pollard","submitted_at":"2018-07-18T03:58:46Z","abstract_excerpt":"This paper addresses the performance of systems which use commercial wireless devices to make bistatic RF channel measurements for non-contact respiration sensing. Published research has typically presented results from short controlled experiments on one system. In this paper, we deploy an extensive real-world comparative human subject study. We observe twenty patients during their overnight sleep (a total of 160 hours), during which contact sensors record ground-truth breathing data, patient position is recorded, and four different RF breathing monitoring systems simultaneously record measur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.06767","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":"2026-05-18T00:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9KX3tFS/QWW96s6vrrqJNSdighoI++PX6pujg7NFWSSLjrbRX9THypFATMaWinbJ21gFbjgK/XVjWic44v0ACg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:10:34.318553Z"},"content_sha256":"0174ad9342b5d2bc547bc976efee6406dbcec20e6281c1eb244b43e6df6f236e","schema_version":"1.0","event_id":"sha256:0174ad9342b5d2bc547bc976efee6406dbcec20e6281c1eb244b43e6df6f236e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AFYGJVNGCU3LXYFFEI7ZK6X4LI/bundle.json","state_url":"https://pith.science/pith/AFYGJVNGCU3LXYFFEI7ZK6X4LI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AFYGJVNGCU3LXYFFEI7ZK6X4LI/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":"2026-05-28T04:10:34Z","links":{"resolver":"https://pith.science/pith/AFYGJVNGCU3LXYFFEI7ZK6X4LI","bundle":"https://pith.science/pith/AFYGJVNGCU3LXYFFEI7ZK6X4LI/bundle.json","state":"https://pith.science/pith/AFYGJVNGCU3LXYFFEI7ZK6X4LI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AFYGJVNGCU3LXYFFEI7ZK6X4LI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:AFYGJVNGCU3LXYFFEI7ZK6X4LI","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":"52d5e4e52ac3fd21dcb67a83e268d2b60295365f96c87d0413eff67a216bcee4","cross_cats_sorted":["physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-07-18T03:58:46Z","title_canon_sha256":"efc6d4d86a4c51b21040c8f7e180a8a665b610ed3a79fbbeb472048965a5060d"},"schema_version":"1.0","source":{"id":"1807.06767","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.06767","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1807.06767v1","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.06767","created_at":"2026-05-18T00:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"AFYGJVNGCU3L","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_16","alias_value":"AFYGJVNGCU3LXYFF","created_at":"2026-05-18T12:32:13Z"},{"alias_kind":"pith_short_8","alias_value":"AFYGJVNG","created_at":"2026-05-18T12:32:13Z"}],"graph_snapshots":[{"event_id":"sha256:0174ad9342b5d2bc547bc976efee6406dbcec20e6281c1eb244b43e6df6f236e","target":"graph","created_at":"2026-05-18T00:10:25Z","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 addresses the performance of systems which use commercial wireless devices to make bistatic RF channel measurements for non-contact respiration sensing. Published research has typically presented results from short controlled experiments on one system. In this paper, we deploy an extensive real-world comparative human subject study. We observe twenty patients during their overnight sleep (a total of 160 hours), during which contact sensors record ground-truth breathing data, patient position is recorded, and four different RF breathing monitoring systems simultaneously record measur","authors_text":"Alemayehu Solomon Abrar, Anh Luong, Christina A. Porucznik, Jason Burch, Krishna Sundar, Neal Patwari, Peter Hillyard, Robert Farney, Sarah Hatch Pollard","cross_cats":["physics.med-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-07-18T03:58:46Z","title":"Comparing Respiratory Monitoring Performance of Commercial Wireless Devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.06767","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":"sha256:1d210f0df3b2243acff27cef28999ee007678636cef9850b4c96718aabb4cec3","target":"record","created_at":"2026-05-18T00:10:25Z","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":"52d5e4e52ac3fd21dcb67a83e268d2b60295365f96c87d0413eff67a216bcee4","cross_cats_sorted":["physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-07-18T03:58:46Z","title_canon_sha256":"efc6d4d86a4c51b21040c8f7e180a8a665b610ed3a79fbbeb472048965a5060d"},"schema_version":"1.0","source":{"id":"1807.06767","kind":"arxiv","version":1}},"canonical_sha256":"017064d5a61536bbe0a5223f957afc5a37f7fae139efaa67fa15842276bf8ed9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"017064d5a61536bbe0a5223f957afc5a37f7fae139efaa67fa15842276bf8ed9","first_computed_at":"2026-05-18T00:10:25.846816Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:10:25.846816Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"T8EPPiY/gJP+z8W+L6WnHpKpN08r/SNpHqgtmESf6z1kq2tFg+zFhQboXvR+NndVz0RIYGFKuzq5fvmLBHpiAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:10:25.847474Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.06767","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d210f0df3b2243acff27cef28999ee007678636cef9850b4c96718aabb4cec3","sha256:0174ad9342b5d2bc547bc976efee6406dbcec20e6281c1eb244b43e6df6f236e"],"state_sha256":"ca0d204d49ff046c861bc83ffdb71a37c8d2fad268d47561974669c7fd4d7751"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/2gz/vFZ1n0KeNhNXaLhBv/XkSznfJZWWwUtJ2BNqSwzFHuWLHUMWmY4CcC+whpVi/gCP4Y3Rf9hmtAqQJqjAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:10:34.320516Z","bundle_sha256":"45a413d6762ce9ea757d625a1a222121b113801fdd0d116b56d3e8bf46c995d7"}}