{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:ILYYY2Y56OJGKOLRZBZISCBUFG","short_pith_number":"pith:ILYYY2Y5","canonical_record":{"source":{"id":"2401.05170","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2024-01-10T14:05:53Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"09c5f0e43a97672c06e5e0e9296b6439e2392b9ef5f47bcec5b10fd680a5ef6f","abstract_canon_sha256":"ff1d9bccd48942146260bbcefe6bf02df54038876fbffe6c11b437f3cb88fde9"},"schema_version":"1.0"},"canonical_sha256":"42f18c6b1df392653971c87289083429a8c2703caf5c3c29ced0576c58775098","source":{"kind":"arxiv","id":"2401.05170","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2401.05170","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"arxiv_version","alias_value":"2401.05170v1","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2401.05170","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"pith_short_12","alias_value":"ILYYY2Y56OJG","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"pith_short_16","alias_value":"ILYYY2Y56OJGKOLR","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"pith_short_8","alias_value":"ILYYY2Y5","created_at":"2026-07-05T09:15:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:ILYYY2Y56OJGKOLRZBZISCBUFG","target":"record","payload":{"canonical_record":{"source":{"id":"2401.05170","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2024-01-10T14:05:53Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"09c5f0e43a97672c06e5e0e9296b6439e2392b9ef5f47bcec5b10fd680a5ef6f","abstract_canon_sha256":"ff1d9bccd48942146260bbcefe6bf02df54038876fbffe6c11b437f3cb88fde9"},"schema_version":"1.0"},"canonical_sha256":"42f18c6b1df392653971c87289083429a8c2703caf5c3c29ced0576c58775098","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:15:07.653489Z","signature_b64":"xfrvqKRPEoyfWQHrcHWo3xKzqnKQkAcarv+AvqBbBGm3gCedteOkZO15A1kPEzBT4t6l7EQxrZqQ7qhkHDHnAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"42f18c6b1df392653971c87289083429a8c2703caf5c3c29ced0576c58775098","last_reissued_at":"2026-07-05T09:15:07.653052Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:15:07.653052Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2401.05170","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":"2026-07-05T09:15:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5v6Dk52ByGf9yoMMuODXxvnUnbA8gXyl4+r9oH7GffBu5Nqq53nkJ8OOYBacO9swn2xnyde/a7XhcxGtnPUNDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T17:35:08.335092Z"},"content_sha256":"cc6c2b97781ccaa23d67510e7e3b28a401e7af40bc9ead1aba252d970fc2f4d5","schema_version":"1.0","event_id":"sha256:cc6c2b97781ccaa23d67510e7e3b28a401e7af40bc9ead1aba252d970fc2f4d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:ILYYY2Y56OJGKOLRZBZISCBUFG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"TRTAR: Transmissive RIS-assisted Through-the-wall Human Activity Recognition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Jianan Zhang, Junshuo Liu, Robert Caiming Qiu, Rujing Xiong, Yunlong Huang","submitted_at":"2024-01-10T14:05:53Z","abstract_excerpt":"Device-free human activity recognition plays a pivotal role in wireless sensing. However, current systems often fail to accommodate signal transmission through walls or necessitate dedicated noise removal algorithms. To overcome these limitations, we introduce TRTAR: a device-free passive human activity recognition system integrated with a transmissive reconfigurable intelligent surface (RIS). TRTAR eliminates the necessity for dedicated devices or noise removal algorithms, while specifically addressing signal propagation through walls. Unlike existing approaches, TRTAR solely employs a transm"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2401.05170","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2401.05170/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T09:15:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tGYcKjemmz/SX7Fe0tEXRJNQNPicxq2STzKl8P71GWIvaesrzB8hWwtKObKLPXq52aHaRwjcoVI41emRtBMaDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-31T17:35:08.335547Z"},"content_sha256":"8cac14caacb4d9281e87b72a7eb8abd149b73f3b5fba30f07dc899568068eed5","schema_version":"1.0","event_id":"sha256:8cac14caacb4d9281e87b72a7eb8abd149b73f3b5fba30f07dc899568068eed5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ILYYY2Y56OJGKOLRZBZISCBUFG/bundle.json","state_url":"https://pith.science/pith/ILYYY2Y56OJGKOLRZBZISCBUFG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ILYYY2Y56OJGKOLRZBZISCBUFG/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":"2026-07-31T17:35:08Z","links":{"resolver":"https://pith.science/pith/ILYYY2Y56OJGKOLRZBZISCBUFG","bundle":"https://pith.science/pith/ILYYY2Y56OJGKOLRZBZISCBUFG/bundle.json","state":"https://pith.science/pith/ILYYY2Y56OJGKOLRZBZISCBUFG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ILYYY2Y56OJGKOLRZBZISCBUFG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:ILYYY2Y56OJGKOLRZBZISCBUFG","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":"ff1d9bccd48942146260bbcefe6bf02df54038876fbffe6c11b437f3cb88fde9","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2024-01-10T14:05:53Z","title_canon_sha256":"09c5f0e43a97672c06e5e0e9296b6439e2392b9ef5f47bcec5b10fd680a5ef6f"},"schema_version":"1.0","source":{"id":"2401.05170","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2401.05170","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"arxiv_version","alias_value":"2401.05170v1","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2401.05170","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"pith_short_12","alias_value":"ILYYY2Y56OJG","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"pith_short_16","alias_value":"ILYYY2Y56OJGKOLR","created_at":"2026-07-05T09:15:07Z"},{"alias_kind":"pith_short_8","alias_value":"ILYYY2Y5","created_at":"2026-07-05T09:15:07Z"}],"graph_snapshots":[{"event_id":"sha256:8cac14caacb4d9281e87b72a7eb8abd149b73f3b5fba30f07dc899568068eed5","target":"graph","created_at":"2026-07-05T09:15:07Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2401.05170/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Device-free human activity recognition plays a pivotal role in wireless sensing. However, current systems often fail to accommodate signal transmission through walls or necessitate dedicated noise removal algorithms. To overcome these limitations, we introduce TRTAR: a device-free passive human activity recognition system integrated with a transmissive reconfigurable intelligent surface (RIS). TRTAR eliminates the necessity for dedicated devices or noise removal algorithms, while specifically addressing signal propagation through walls. Unlike existing approaches, TRTAR solely employs a transm","authors_text":"Jianan Zhang, Junshuo Liu, Robert Caiming Qiu, Rujing Xiong, Yunlong Huang","cross_cats":["cs.SY"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2024-01-10T14:05:53Z","title":"TRTAR: Transmissive RIS-assisted Through-the-wall Human Activity Recognition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2401.05170","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:cc6c2b97781ccaa23d67510e7e3b28a401e7af40bc9ead1aba252d970fc2f4d5","target":"record","created_at":"2026-07-05T09:15:07Z","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":"ff1d9bccd48942146260bbcefe6bf02df54038876fbffe6c11b437f3cb88fde9","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2024-01-10T14:05:53Z","title_canon_sha256":"09c5f0e43a97672c06e5e0e9296b6439e2392b9ef5f47bcec5b10fd680a5ef6f"},"schema_version":"1.0","source":{"id":"2401.05170","kind":"arxiv","version":1}},"canonical_sha256":"42f18c6b1df392653971c87289083429a8c2703caf5c3c29ced0576c58775098","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42f18c6b1df392653971c87289083429a8c2703caf5c3c29ced0576c58775098","first_computed_at":"2026-07-05T09:15:07.653052Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:15:07.653052Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xfrvqKRPEoyfWQHrcHWo3xKzqnKQkAcarv+AvqBbBGm3gCedteOkZO15A1kPEzBT4t6l7EQxrZqQ7qhkHDHnAg==","signature_status":"signed_v1","signed_at":"2026-07-05T09:15:07.653489Z","signed_message":"canonical_sha256_bytes"},"source_id":"2401.05170","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc6c2b97781ccaa23d67510e7e3b28a401e7af40bc9ead1aba252d970fc2f4d5","sha256:8cac14caacb4d9281e87b72a7eb8abd149b73f3b5fba30f07dc899568068eed5"],"state_sha256":"92d208e156a5f4c8cc0f69b69c71b90dc44feee6f8900cc6ca3dd01fb8ff2b1f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WTzNoHnAFOW5OuOptYk2QNTSw11nd1HccY073+y7QH2aNCtGmjWL/UcJH4z4vnMyYdBrAtjvvaWLKJ31tDnOBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-31T17:35:08.338451Z","bundle_sha256":"a33a6851889748269856927eb3c82d08bda883dfe8f285895ff05c032b50b886"}}