{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:PUWH5C5J26NMDOW6VHFNUG2LT7","short_pith_number":"pith:PUWH5C5J","canonical_record":{"source":{"id":"1407.2396","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-07-09T09:11:06Z","cross_cats_sorted":[],"title_canon_sha256":"5851b0397b748136be809700384ec8c4688639f5e570da24ecf4fe105aa1b264","abstract_canon_sha256":"108b734eb23857092617a65dd5643bbd45ecaade01983b467998fd2ecaab19e2"},"schema_version":"1.0"},"canonical_sha256":"7d2c7e8ba9d79ac1badea9cada1b4b9fe1bcab2bdf1512faa00a7bdc863b08d9","source":{"kind":"arxiv","id":"1407.2396","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2396","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2396v3","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2396","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"pith_short_12","alias_value":"PUWH5C5J26NM","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"PUWH5C5J26NMDOW6","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"PUWH5C5J","created_at":"2026-05-18T12:28:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:PUWH5C5J26NMDOW6VHFNUG2LT7","target":"record","payload":{"canonical_record":{"source":{"id":"1407.2396","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-07-09T09:11:06Z","cross_cats_sorted":[],"title_canon_sha256":"5851b0397b748136be809700384ec8c4688639f5e570da24ecf4fe105aa1b264","abstract_canon_sha256":"108b734eb23857092617a65dd5643bbd45ecaade01983b467998fd2ecaab19e2"},"schema_version":"1.0"},"canonical_sha256":"7d2c7e8ba9d79ac1badea9cada1b4b9fe1bcab2bdf1512faa00a7bdc863b08d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:11.466770Z","signature_b64":"2RRHc/ZAG54XA0/IX2LpFuPf7YeQWtmoqGPxuk0oiIRIW5Ut1hZ00u/616hYxj3irTXnv7vEXALd/BMFm4BjAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7d2c7e8ba9d79ac1badea9cada1b4b9fe1bcab2bdf1512faa00a7bdc863b08d9","last_reissued_at":"2026-05-18T02:12:11.465997Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:11.465997Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.2396","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:12:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RpH5/I7nio/m0yPEO6qQyKkft4FUUmicErfHxkCSrUaNlkHyMihuUH8mZ0YBkUoz0yunGZc9PBjz+lLhifsVAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:48:22.611662Z"},"content_sha256":"dd459f603da865f59150ac9b908cdaadac1ce8665e77278fd1fd75df3cf7762e","schema_version":"1.0","event_id":"sha256:dd459f603da865f59150ac9b908cdaadac1ce8665e77278fd1fd75df3cf7762e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:PUWH5C5J26NMDOW6VHFNUG2LT7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Device-free Localization using Received Signal Strength Measurements in Radio Frequency Network","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.NI","authors_text":"Heng Liu, Jianping An, Shengxin Xu, Xiangyuan Bu, Zhenghuan Wang","submitted_at":"2014-07-09T09:11:06Z","abstract_excerpt":"Device-free localization (DFL) based on the received signal strength (RSS) measurements of radio frequency (RF)links is the method using RSS variation due to the presence of the target to localize the target without attaching any device. The majority of DFL methods utilize the fact the link will experience great attenuation when obstructed. Thus that localization accuracy depends on the model which describes the relationship between RSS loss caused by obstruction and the position of the target. The existing models is too rough to explain some phenomenon observed in the experiment measurements."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2396","kind":"arxiv","version":3},"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":"2026-05-18T02:12:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1ozEhBbvJW8rosj0mdRXeHwEzivud0Wop85/d2Ke8ETLQ8601zP+kKDQTHKNHFhjdQacxlhFgebL3K3THVQwCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:48:22.612297Z"},"content_sha256":"492c3556172d774f34eefa2cd832082e381e83819aa86bebe1fccb0934fcdecc","schema_version":"1.0","event_id":"sha256:492c3556172d774f34eefa2cd832082e381e83819aa86bebe1fccb0934fcdecc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PUWH5C5J26NMDOW6VHFNUG2LT7/bundle.json","state_url":"https://pith.science/pith/PUWH5C5J26NMDOW6VHFNUG2LT7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PUWH5C5J26NMDOW6VHFNUG2LT7/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":"2026-05-25T18:48:22Z","links":{"resolver":"https://pith.science/pith/PUWH5C5J26NMDOW6VHFNUG2LT7","bundle":"https://pith.science/pith/PUWH5C5J26NMDOW6VHFNUG2LT7/bundle.json","state":"https://pith.science/pith/PUWH5C5J26NMDOW6VHFNUG2LT7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PUWH5C5J26NMDOW6VHFNUG2LT7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:PUWH5C5J26NMDOW6VHFNUG2LT7","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":"108b734eb23857092617a65dd5643bbd45ecaade01983b467998fd2ecaab19e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-07-09T09:11:06Z","title_canon_sha256":"5851b0397b748136be809700384ec8c4688639f5e570da24ecf4fe105aa1b264"},"schema_version":"1.0","source":{"id":"1407.2396","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2396","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2396v3","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2396","created_at":"2026-05-18T02:12:11Z"},{"alias_kind":"pith_short_12","alias_value":"PUWH5C5J26NM","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"PUWH5C5J26NMDOW6","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"PUWH5C5J","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:492c3556172d774f34eefa2cd832082e381e83819aa86bebe1fccb0934fcdecc","target":"graph","created_at":"2026-05-18T02:12:11Z","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":"Device-free localization (DFL) based on the received signal strength (RSS) measurements of radio frequency (RF)links is the method using RSS variation due to the presence of the target to localize the target without attaching any device. The majority of DFL methods utilize the fact the link will experience great attenuation when obstructed. Thus that localization accuracy depends on the model which describes the relationship between RSS loss caused by obstruction and the position of the target. The existing models is too rough to explain some phenomenon observed in the experiment measurements.","authors_text":"Heng Liu, Jianping An, Shengxin Xu, Xiangyuan Bu, Zhenghuan Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-07-09T09:11:06Z","title":"Device-free Localization using Received Signal Strength Measurements in Radio Frequency Network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2396","kind":"arxiv","version":3},"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:dd459f603da865f59150ac9b908cdaadac1ce8665e77278fd1fd75df3cf7762e","target":"record","created_at":"2026-05-18T02:12:11Z","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":"108b734eb23857092617a65dd5643bbd45ecaade01983b467998fd2ecaab19e2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2014-07-09T09:11:06Z","title_canon_sha256":"5851b0397b748136be809700384ec8c4688639f5e570da24ecf4fe105aa1b264"},"schema_version":"1.0","source":{"id":"1407.2396","kind":"arxiv","version":3}},"canonical_sha256":"7d2c7e8ba9d79ac1badea9cada1b4b9fe1bcab2bdf1512faa00a7bdc863b08d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7d2c7e8ba9d79ac1badea9cada1b4b9fe1bcab2bdf1512faa00a7bdc863b08d9","first_computed_at":"2026-05-18T02:12:11.465997Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:12:11.465997Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2RRHc/ZAG54XA0/IX2LpFuPf7YeQWtmoqGPxuk0oiIRIW5Ut1hZ00u/616hYxj3irTXnv7vEXALd/BMFm4BjAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:12:11.466770Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2396","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd459f603da865f59150ac9b908cdaadac1ce8665e77278fd1fd75df3cf7762e","sha256:492c3556172d774f34eefa2cd832082e381e83819aa86bebe1fccb0934fcdecc"],"state_sha256":"55fbd7c2b0778dee6fb42b40e57f7b0a397be6eb0a91087735ff69897c38142f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bZixjQU/ekUdgeyZN/86QH8urAxSpZK3F0rru5ke3zBp7ajyO/RJnIk+LBAL1qRHpFsCGJTqcYrCBwyGRWe/BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:48:22.615549Z","bundle_sha256":"72ac599f853e66b651ede0d22e5e2fdb6d01dfaf294bffd6ae797af9c2f4c30e"}}