{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:C3XECIU5UGT5WAHHCXBLZPUXKX","short_pith_number":"pith:C3XECIU5","canonical_record":{"source":{"id":"2103.09104","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-03-16T14:37:26Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"4640a7de886d03e0b660f79ad84b5d0752ba0337926b43f775fc005ac4719038","abstract_canon_sha256":"144280b9a5b49541c2854163e747211b4abcddee00b4506c7d6de9c842177270"},"schema_version":"1.0"},"canonical_sha256":"16ee41229da1a7db00e715c2bcbe9755fcbe4557b1f2ec99f0a3717914bc16c1","source":{"kind":"arxiv","id":"2103.09104","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.09104","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"arxiv_version","alias_value":"2103.09104v2","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.09104","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"pith_short_12","alias_value":"C3XECIU5UGT5","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"pith_short_16","alias_value":"C3XECIU5UGT5WAHH","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"pith_short_8","alias_value":"C3XECIU5","created_at":"2026-07-05T04:56:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:C3XECIU5UGT5WAHHCXBLZPUXKX","target":"record","payload":{"canonical_record":{"source":{"id":"2103.09104","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-03-16T14:37:26Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"4640a7de886d03e0b660f79ad84b5d0752ba0337926b43f775fc005ac4719038","abstract_canon_sha256":"144280b9a5b49541c2854163e747211b4abcddee00b4506c7d6de9c842177270"},"schema_version":"1.0"},"canonical_sha256":"16ee41229da1a7db00e715c2bcbe9755fcbe4557b1f2ec99f0a3717914bc16c1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:56:58.382159Z","signature_b64":"36bZS6ezlmg0DVqOzTV+7BCGsTxtXvgnlv0F6HVmOWcFIszR9wGjaqXxopBGCootoL673hRF8cuEskJCbj2LBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16ee41229da1a7db00e715c2bcbe9755fcbe4557b1f2ec99f0a3717914bc16c1","last_reissued_at":"2026-07-05T04:56:58.381726Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:56:58.381726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.09104","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:56:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8FcXGzlYWo4xnTBs0cpMfc/1NY8P5F8dmU1CpKvE9DzA1bax1WgWCItsQLrSSLF2ks9jJ0ElFYgI+jD0yOMMAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T06:07:31.773889Z"},"content_sha256":"715d98d7793c322019bd43c0702353616f6420a825cf9846f3deb48e17452347","schema_version":"1.0","event_id":"sha256:715d98d7793c322019bd43c0702353616f6420a825cf9846f3deb48e17452347"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:C3XECIU5UGT5WAHHCXBLZPUXKX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"STAR: Simultaneous Transmission And Reflection for 360{\\deg} Coverage by Intelligent Surfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"H. Vincent Poor, Jiaqi Xu, Lajos Hanzo, Robert Schober, Xidong Mu, Yang Hao, Yuanwei Liu","submitted_at":"2021-03-16T14:37:26Z","abstract_excerpt":"A novel simultaneously transmitting and reflecting (STAR) system design relying on reconfigurable intelligent surfaces (RISs) is conceived. First, an existing prototype is reviewed and the potential benefits of STAR-RISs are discussed. Then, the key differences between conventional reflecting-only RISs and STAR-RISs are identified from the perspectives of hardware design, physics principles, and communication system design. Furthermore, the basic signal model of STAR-RISs is introduced, and three practical protocols are proposed for their operation, namely energy splitting, mode switching, and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.09104","kind":"arxiv","version":2},"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/2103.09104/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":"2026-07-05T04:56:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"icp+6Lc5J5tVFs65CYAVMN6jqQ0LrQFksAi15SnVBP0YVrmiGaMNemtzrA35/2pnT78aGTMFueno/aXh5DagBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T06:07:31.774841Z"},"content_sha256":"5ed4f0f8574f0c86d836f32c22f0c2acfc0c82302d6e125e430e2a261361ec36","schema_version":"1.0","event_id":"sha256:5ed4f0f8574f0c86d836f32c22f0c2acfc0c82302d6e125e430e2a261361ec36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C3XECIU5UGT5WAHHCXBLZPUXKX/bundle.json","state_url":"https://pith.science/pith/C3XECIU5UGT5WAHHCXBLZPUXKX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C3XECIU5UGT5WAHHCXBLZPUXKX/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":"2026-08-05T06:07:31Z","links":{"resolver":"https://pith.science/pith/C3XECIU5UGT5WAHHCXBLZPUXKX","bundle":"https://pith.science/pith/C3XECIU5UGT5WAHHCXBLZPUXKX/bundle.json","state":"https://pith.science/pith/C3XECIU5UGT5WAHHCXBLZPUXKX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C3XECIU5UGT5WAHHCXBLZPUXKX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:C3XECIU5UGT5WAHHCXBLZPUXKX","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":"144280b9a5b49541c2854163e747211b4abcddee00b4506c7d6de9c842177270","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-03-16T14:37:26Z","title_canon_sha256":"4640a7de886d03e0b660f79ad84b5d0752ba0337926b43f775fc005ac4719038"},"schema_version":"1.0","source":{"id":"2103.09104","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.09104","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"arxiv_version","alias_value":"2103.09104v2","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.09104","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"pith_short_12","alias_value":"C3XECIU5UGT5","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"pith_short_16","alias_value":"C3XECIU5UGT5WAHH","created_at":"2026-07-05T04:56:58Z"},{"alias_kind":"pith_short_8","alias_value":"C3XECIU5","created_at":"2026-07-05T04:56:58Z"}],"graph_snapshots":[{"event_id":"sha256:5ed4f0f8574f0c86d836f32c22f0c2acfc0c82302d6e125e430e2a261361ec36","target":"graph","created_at":"2026-07-05T04:56:58Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2103.09104/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A novel simultaneously transmitting and reflecting (STAR) system design relying on reconfigurable intelligent surfaces (RISs) is conceived. First, an existing prototype is reviewed and the potential benefits of STAR-RISs are discussed. Then, the key differences between conventional reflecting-only RISs and STAR-RISs are identified from the perspectives of hardware design, physics principles, and communication system design. Furthermore, the basic signal model of STAR-RISs is introduced, and three practical protocols are proposed for their operation, namely energy splitting, mode switching, and","authors_text":"H. Vincent Poor, Jiaqi Xu, Lajos Hanzo, Robert Schober, Xidong Mu, Yang Hao, Yuanwei Liu","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-03-16T14:37:26Z","title":"STAR: Simultaneous Transmission And Reflection for 360{\\deg} Coverage by Intelligent Surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.09104","kind":"arxiv","version":2},"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":"sha256:715d98d7793c322019bd43c0702353616f6420a825cf9846f3deb48e17452347","target":"record","created_at":"2026-07-05T04:56:58Z","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":"144280b9a5b49541c2854163e747211b4abcddee00b4506c7d6de9c842177270","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2021-03-16T14:37:26Z","title_canon_sha256":"4640a7de886d03e0b660f79ad84b5d0752ba0337926b43f775fc005ac4719038"},"schema_version":"1.0","source":{"id":"2103.09104","kind":"arxiv","version":2}},"canonical_sha256":"16ee41229da1a7db00e715c2bcbe9755fcbe4557b1f2ec99f0a3717914bc16c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"16ee41229da1a7db00e715c2bcbe9755fcbe4557b1f2ec99f0a3717914bc16c1","first_computed_at":"2026-07-05T04:56:58.381726Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:56:58.381726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"36bZS6ezlmg0DVqOzTV+7BCGsTxtXvgnlv0F6HVmOWcFIszR9wGjaqXxopBGCootoL673hRF8cuEskJCbj2LBA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:56:58.382159Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.09104","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:715d98d7793c322019bd43c0702353616f6420a825cf9846f3deb48e17452347","sha256:5ed4f0f8574f0c86d836f32c22f0c2acfc0c82302d6e125e430e2a261361ec36"],"state_sha256":"7c4cda8e4ac2754207e05cbcff08d38cd968d313919e9d2ebaa4fcd2744f0538"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gZwk35MIzAneQVXuvyGCCJTur9iXL/78ignsqOefZdsCnJKwGkofVJYbMpczdMVWi7p0npypDV+eAft96bANDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T06:07:31.780203Z","bundle_sha256":"9dfd21a2f890a115798bc037c64fd2f94cc50ec971528929522ad49b3db7c513"}}