{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:LHYHQYBDE25PBRZGUKUWOY4PWL","short_pith_number":"pith:LHYHQYBD","canonical_record":{"source":{"id":"1811.10129","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-26T00:48:00Z","cross_cats_sorted":[],"title_canon_sha256":"0891371e36bbf9d7287db14b81dbdcf6a94fedd5b4e18d594a3555e5a080a324","abstract_canon_sha256":"362159f4cba65845c0e93ffdfd68acf4cce5c31223323fa88ee84624a257360a"},"schema_version":"1.0"},"canonical_sha256":"59f078602326baf0c726a2a967638fb2faffb5da0b9ac3e73f6b49b7ebd94c24","source":{"kind":"arxiv","id":"1811.10129","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.10129","created_at":"2026-05-17T23:59:58Z"},{"alias_kind":"arxiv_version","alias_value":"1811.10129v1","created_at":"2026-05-17T23:59:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.10129","created_at":"2026-05-17T23:59:58Z"},{"alias_kind":"pith_short_12","alias_value":"LHYHQYBDE25P","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LHYHQYBDE25PBRZG","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LHYHQYBD","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:LHYHQYBDE25PBRZGUKUWOY4PWL","target":"record","payload":{"canonical_record":{"source":{"id":"1811.10129","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-26T00:48:00Z","cross_cats_sorted":[],"title_canon_sha256":"0891371e36bbf9d7287db14b81dbdcf6a94fedd5b4e18d594a3555e5a080a324","abstract_canon_sha256":"362159f4cba65845c0e93ffdfd68acf4cce5c31223323fa88ee84624a257360a"},"schema_version":"1.0"},"canonical_sha256":"59f078602326baf0c726a2a967638fb2faffb5da0b9ac3e73f6b49b7ebd94c24","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:59:58.604833Z","signature_b64":"wacVGz7x3qq5bGDSdw5hjDUFgTyMqby1epQPbl8rvv4usiXXywOpCWV2vOFzXt8DbK3EcafNkeH0sSsAMeaZAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"59f078602326baf0c726a2a967638fb2faffb5da0b9ac3e73f6b49b7ebd94c24","last_reissued_at":"2026-05-17T23:59:58.604365Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:59:58.604365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.10129","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":"2026-05-17T23:59:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q4DMGppGoGsWb/2l19hT332IM8PTUVwqpvLKtmN4hbHqQymMKsJY5PoDO2SfPvZG1gHHuldUbtNQFGd0VhMsAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T23:52:03.903915Z"},"content_sha256":"273d14cd2cc0c4731a69493a946e7deea6af42b1f54ab39e914889c7038d5198","schema_version":"1.0","event_id":"sha256:273d14cd2cc0c4731a69493a946e7deea6af42b1f54ab39e914889c7038d5198"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:LHYHQYBDE25PBRZGUKUWOY4PWL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Save Our Spectrum: Contact-Free Human Sensing Using Single Carrier Radio","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Alemayehu Solomon Abrar, Anh Luong, Neal Patwari, Peter Hillyard","submitted_at":"2018-11-26T00:48:00Z","abstract_excerpt":"Recent research has demonstrated new capabilities in radio frequency (RF) sensing that apply to health care, smart home, and security applications. However, previous work in RF sensing requires heavy utilization of the radio spectrum, for example, transmitting thousands of WiFi packets per second. In this paper, we present a device-free human sensing system based on received signal strength (RSS) measurements from a low-cost single carrier narrowband radio transceiver. We test and validate its performance in three different applications: real-time heart rate monitoring, gesture recognition, an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.10129","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":"2026-05-17T23:59:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VVVJ/UJaSvVLGoRcCAqSWd66TN2sAEbUVH1fRPcZbTP1H/+mtEdfDs7bnAPUMGoa/wMk9HelOFlRJMkQa25+AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T23:52:03.904267Z"},"content_sha256":"f33394dcae292d65e7b8a665bbae4aa9ea84a72856a86bb25f27eaeb3a9c608e","schema_version":"1.0","event_id":"sha256:f33394dcae292d65e7b8a665bbae4aa9ea84a72856a86bb25f27eaeb3a9c608e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LHYHQYBDE25PBRZGUKUWOY4PWL/bundle.json","state_url":"https://pith.science/pith/LHYHQYBDE25PBRZGUKUWOY4PWL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LHYHQYBDE25PBRZGUKUWOY4PWL/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":"2026-06-23T23:52:03Z","links":{"resolver":"https://pith.science/pith/LHYHQYBDE25PBRZGUKUWOY4PWL","bundle":"https://pith.science/pith/LHYHQYBDE25PBRZGUKUWOY4PWL/bundle.json","state":"https://pith.science/pith/LHYHQYBDE25PBRZGUKUWOY4PWL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LHYHQYBDE25PBRZGUKUWOY4PWL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LHYHQYBDE25PBRZGUKUWOY4PWL","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":"362159f4cba65845c0e93ffdfd68acf4cce5c31223323fa88ee84624a257360a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-26T00:48:00Z","title_canon_sha256":"0891371e36bbf9d7287db14b81dbdcf6a94fedd5b4e18d594a3555e5a080a324"},"schema_version":"1.0","source":{"id":"1811.10129","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.10129","created_at":"2026-05-17T23:59:58Z"},{"alias_kind":"arxiv_version","alias_value":"1811.10129v1","created_at":"2026-05-17T23:59:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.10129","created_at":"2026-05-17T23:59:58Z"},{"alias_kind":"pith_short_12","alias_value":"LHYHQYBDE25P","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LHYHQYBDE25PBRZG","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LHYHQYBD","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:f33394dcae292d65e7b8a665bbae4aa9ea84a72856a86bb25f27eaeb3a9c608e","target":"graph","created_at":"2026-05-17T23:59:58Z","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":"Recent research has demonstrated new capabilities in radio frequency (RF) sensing that apply to health care, smart home, and security applications. However, previous work in RF sensing requires heavy utilization of the radio spectrum, for example, transmitting thousands of WiFi packets per second. In this paper, we present a device-free human sensing system based on received signal strength (RSS) measurements from a low-cost single carrier narrowband radio transceiver. We test and validate its performance in three different applications: real-time heart rate monitoring, gesture recognition, an","authors_text":"Alemayehu Solomon Abrar, Anh Luong, Neal Patwari, Peter Hillyard","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-26T00:48:00Z","title":"Save Our Spectrum: Contact-Free Human Sensing Using Single Carrier Radio"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.10129","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":"sha256:273d14cd2cc0c4731a69493a946e7deea6af42b1f54ab39e914889c7038d5198","target":"record","created_at":"2026-05-17T23:59:58Z","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":"362159f4cba65845c0e93ffdfd68acf4cce5c31223323fa88ee84624a257360a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2018-11-26T00:48:00Z","title_canon_sha256":"0891371e36bbf9d7287db14b81dbdcf6a94fedd5b4e18d594a3555e5a080a324"},"schema_version":"1.0","source":{"id":"1811.10129","kind":"arxiv","version":1}},"canonical_sha256":"59f078602326baf0c726a2a967638fb2faffb5da0b9ac3e73f6b49b7ebd94c24","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"59f078602326baf0c726a2a967638fb2faffb5da0b9ac3e73f6b49b7ebd94c24","first_computed_at":"2026-05-17T23:59:58.604365Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:59:58.604365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wacVGz7x3qq5bGDSdw5hjDUFgTyMqby1epQPbl8rvv4usiXXywOpCWV2vOFzXt8DbK3EcafNkeH0sSsAMeaZAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:59:58.604833Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.10129","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:273d14cd2cc0c4731a69493a946e7deea6af42b1f54ab39e914889c7038d5198","sha256:f33394dcae292d65e7b8a665bbae4aa9ea84a72856a86bb25f27eaeb3a9c608e"],"state_sha256":"75a986f5419ad3c99336f28486394f6657cc2bca7b4783e726a68ce986e29a8f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O5cWLZfKf1wpEc7XrhulRxaOqjjHKc6DxtTm9mc0nCAcgwcPSjsWLh7h4oo/KK14unavxQhQ/3ymwDm6m8LyBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T23:52:03.906278Z","bundle_sha256":"e722d8e94991f0b9c22b3f0be9ff0f649d527cff6ad76c5b8a8bfdf24607ee10"}}