{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:HCL5VSD6UR53OL3I7LZ5ZPUSOM","short_pith_number":"pith:HCL5VSD6","canonical_record":{"source":{"id":"2304.14232","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2023-04-27T14:41:39Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"a1daabec8a84e26270eaf167460f1f099053fa77d1960b23b73cb173015f5789","abstract_canon_sha256":"4f77403a521a0337463b94fddb4e6df6a712664b4b2e0728a68629ae76beb2f8"},"schema_version":"1.0"},"canonical_sha256":"3897dac87ea47bb72f68faf3dcbe92731be916aa84ecd03e88dcfef2c6823833","source":{"kind":"arxiv","id":"2304.14232","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2304.14232","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"arxiv_version","alias_value":"2304.14232v4","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.14232","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"pith_short_12","alias_value":"HCL5VSD6UR53","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"pith_short_16","alias_value":"HCL5VSD6UR53OL3I","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"pith_short_8","alias_value":"HCL5VSD6","created_at":"2026-07-05T07:04:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:HCL5VSD6UR53OL3I7LZ5ZPUSOM","target":"record","payload":{"canonical_record":{"source":{"id":"2304.14232","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2023-04-27T14:41:39Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"a1daabec8a84e26270eaf167460f1f099053fa77d1960b23b73cb173015f5789","abstract_canon_sha256":"4f77403a521a0337463b94fddb4e6df6a712664b4b2e0728a68629ae76beb2f8"},"schema_version":"1.0"},"canonical_sha256":"3897dac87ea47bb72f68faf3dcbe92731be916aa84ecd03e88dcfef2c6823833","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:04:46.602194Z","signature_b64":"m7zFD23N8KBP1Nlvt1/5X6IK+OBu/pUvINwJh576kYCKLtshO5JsYKO7Ebuh9aPptHuHFc4BvBT/vadLDq0eBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3897dac87ea47bb72f68faf3dcbe92731be916aa84ecd03e88dcfef2c6823833","last_reissued_at":"2026-07-05T07:04:46.601711Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:04:46.601711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2304.14232","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:04:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pKGPka0h6R482ht1TqZtuB8S2F5GyHu1z+14jvZLxUL21QjqqUbYhMQylnA9rYQyqhDFOGvZ6Fw22jjKnU1vBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T11:10:52.312585Z"},"content_sha256":"26688f42a1de6d73003e302a2d2d7252fd634af8cd57c9c3193482a2e73c7d52","schema_version":"1.0","event_id":"sha256:26688f42a1de6d73003e302a2d2d7252fd634af8cd57c9c3193482a2e73c7d52"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:HCL5VSD6UR53OL3I7LZ5ZPUSOM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Design of Reconfigurable Intelligent Surfaces for Wireless Communication: A Review","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Fuhai Wang, Jialong Lu, Jianan Zhang, Junshuo Liu, Kai Wan, Robert Caiming Qiu, Rujing Xiong, Tiebin Mi, Xiang Ren, Zhengyu Wang","submitted_at":"2023-04-27T14:41:39Z","abstract_excerpt":"This paper addresses the hardware structure of Reconfigurable Intelligent Surfaces (RIS) and presents a comprehensive overview of RIS design, considering both unit design and prototype systems. It commences by tracing the evolutionary trajectory of RIS, originating from static cell-structured hypersurfaces. The article conducts a meticulous examination from the standpoint of adaptability, elucidating the diverse array of unit structures and design philosophies that underlie existing RIS frameworks. Following this, the study systematically categorizes and synthesizes channel modeling research f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.14232","kind":"arxiv","version":4},"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/2304.14232/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":"2026-07-05T07:04:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cOb/4dMPUv5htiLFA5keb6ZSXEuEhN/eOO4VIrJTl8MScqUuwLENsYfhNFWbVJzPu1LUWyl1i6P2JMYzW09fCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-13T11:10:52.312967Z"},"content_sha256":"886bf32238a1c386539eb83684c19ea3cc17d052b529af48e67f37306ba8e0b8","schema_version":"1.0","event_id":"sha256:886bf32238a1c386539eb83684c19ea3cc17d052b529af48e67f37306ba8e0b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HCL5VSD6UR53OL3I7LZ5ZPUSOM/bundle.json","state_url":"https://pith.science/pith/HCL5VSD6UR53OL3I7LZ5ZPUSOM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HCL5VSD6UR53OL3I7LZ5ZPUSOM/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":"2026-07-13T11:10:52Z","links":{"resolver":"https://pith.science/pith/HCL5VSD6UR53OL3I7LZ5ZPUSOM","bundle":"https://pith.science/pith/HCL5VSD6UR53OL3I7LZ5ZPUSOM/bundle.json","state":"https://pith.science/pith/HCL5VSD6UR53OL3I7LZ5ZPUSOM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HCL5VSD6UR53OL3I7LZ5ZPUSOM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:HCL5VSD6UR53OL3I7LZ5ZPUSOM","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":"4f77403a521a0337463b94fddb4e6df6a712664b4b2e0728a68629ae76beb2f8","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2023-04-27T14:41:39Z","title_canon_sha256":"a1daabec8a84e26270eaf167460f1f099053fa77d1960b23b73cb173015f5789"},"schema_version":"1.0","source":{"id":"2304.14232","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2304.14232","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"arxiv_version","alias_value":"2304.14232v4","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.14232","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"pith_short_12","alias_value":"HCL5VSD6UR53","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"pith_short_16","alias_value":"HCL5VSD6UR53OL3I","created_at":"2026-07-05T07:04:46Z"},{"alias_kind":"pith_short_8","alias_value":"HCL5VSD6","created_at":"2026-07-05T07:04:46Z"}],"graph_snapshots":[{"event_id":"sha256:886bf32238a1c386539eb83684c19ea3cc17d052b529af48e67f37306ba8e0b8","target":"graph","created_at":"2026-07-05T07:04:46Z","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/2304.14232/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper addresses the hardware structure of Reconfigurable Intelligent Surfaces (RIS) and presents a comprehensive overview of RIS design, considering both unit design and prototype systems. It commences by tracing the evolutionary trajectory of RIS, originating from static cell-structured hypersurfaces. The article conducts a meticulous examination from the standpoint of adaptability, elucidating the diverse array of unit structures and design philosophies that underlie existing RIS frameworks. Following this, the study systematically categorizes and synthesizes channel modeling research f","authors_text":"Fuhai Wang, Jialong Lu, Jianan Zhang, Junshuo Liu, Kai Wan, Robert Caiming Qiu, Rujing Xiong, Tiebin Mi, Xiang Ren, Zhengyu Wang","cross_cats":["cs.SY"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2023-04-27T14:41:39Z","title":"Design of Reconfigurable Intelligent Surfaces for Wireless Communication: A Review"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.14232","kind":"arxiv","version":4},"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":"sha256:26688f42a1de6d73003e302a2d2d7252fd634af8cd57c9c3193482a2e73c7d52","target":"record","created_at":"2026-07-05T07:04:46Z","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":"4f77403a521a0337463b94fddb4e6df6a712664b4b2e0728a68629ae76beb2f8","cross_cats_sorted":["cs.SY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SY","submitted_at":"2023-04-27T14:41:39Z","title_canon_sha256":"a1daabec8a84e26270eaf167460f1f099053fa77d1960b23b73cb173015f5789"},"schema_version":"1.0","source":{"id":"2304.14232","kind":"arxiv","version":4}},"canonical_sha256":"3897dac87ea47bb72f68faf3dcbe92731be916aa84ecd03e88dcfef2c6823833","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3897dac87ea47bb72f68faf3dcbe92731be916aa84ecd03e88dcfef2c6823833","first_computed_at":"2026-07-05T07:04:46.601711Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:04:46.601711Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m7zFD23N8KBP1Nlvt1/5X6IK+OBu/pUvINwJh576kYCKLtshO5JsYKO7Ebuh9aPptHuHFc4BvBT/vadLDq0eBA==","signature_status":"signed_v1","signed_at":"2026-07-05T07:04:46.602194Z","signed_message":"canonical_sha256_bytes"},"source_id":"2304.14232","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:26688f42a1de6d73003e302a2d2d7252fd634af8cd57c9c3193482a2e73c7d52","sha256:886bf32238a1c386539eb83684c19ea3cc17d052b529af48e67f37306ba8e0b8"],"state_sha256":"154054c81f9bc72c6e6e0f3fb1bf62b20376b55f25ecb6c2b990746159ed4ac7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2j4Pex+GHEsrByTKgwK+Zk9gfGgMI0sz5Q6g1NBmDOjwdgECALB+DH9lHMfKb70nS2iQgVL5q10rvWHrnbHsDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-13T11:10:52.314974Z","bundle_sha256":"b778c93651f042eb8f2000c60249befd0f31bd0f2d16741e63cbb44f3f93d7b8"}}