{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:N5H7M6TAGEU3CPYXBOIOMHPBLL","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":"d0c108538f3991c6194214522e2efb785e8ea7aa1b976c3e4ac123fab781eb98","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-05-14T19:54:15Z","title_canon_sha256":"ae911d1d82434a4e070d2a4d307d80cfc1a69778fbcf9292aa5979098150aaa5"},"schema_version":"1.0","source":{"id":"2505.09767","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.09767","created_at":"2026-07-05T11:03:28Z"},{"alias_kind":"arxiv_version","alias_value":"2505.09767v1","created_at":"2026-07-05T11:03:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.09767","created_at":"2026-07-05T11:03:28Z"},{"alias_kind":"pith_short_12","alias_value":"N5H7M6TAGEU3","created_at":"2026-07-05T11:03:28Z"},{"alias_kind":"pith_short_16","alias_value":"N5H7M6TAGEU3CPYX","created_at":"2026-07-05T11:03:28Z"},{"alias_kind":"pith_short_8","alias_value":"N5H7M6TA","created_at":"2026-07-05T11:03:28Z"}],"graph_snapshots":[{"event_id":"sha256:2d98083364b2b7af56270a9656f8e2f833e97872d321a77da7f867410e8322b2","target":"graph","created_at":"2026-07-05T11:03:28Z","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/2505.09767/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Reconfigurable intelligent surface (RIS)-aided terahertz (THz)-band communications are promising enablers for future wireless networks. However, array densification at high frequencies introduces significant challenges in accurate channel modeling and estimation, particularly with THz-specific fading, mutual coupling (MC), spatial correlation, and near-field effects. In this work, we model THz outdoor small-scale fading channels using the mixture gamma (MG) distribution, considering absorption losses, spherical wave propagation, MC, and spatial correlation across large base stations and RISs. ","authors_text":"Ahmad Dkhan, Hadi Sarieddeen, Ibrahim Abou-Faycal, Simon Tarboush, Tareq Y. Al-Naffouri","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-05-14T19:54:15Z","title":"THz-Band Near-Field RIS Channel Modeling for Linear Channel Estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.09767","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:a273cdae60393bf542f3cf1059efc51124cf7647e70a8fac043a56305b0d4612","target":"record","created_at":"2026-07-05T11:03:28Z","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":"d0c108538f3991c6194214522e2efb785e8ea7aa1b976c3e4ac123fab781eb98","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2025-05-14T19:54:15Z","title_canon_sha256":"ae911d1d82434a4e070d2a4d307d80cfc1a69778fbcf9292aa5979098150aaa5"},"schema_version":"1.0","source":{"id":"2505.09767","kind":"arxiv","version":1}},"canonical_sha256":"6f4ff67a603129b13f170b90e61de15af82b7aa2953501b46691389c825a9b7c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6f4ff67a603129b13f170b90e61de15af82b7aa2953501b46691389c825a9b7c","first_computed_at":"2026-07-05T11:03:28.181792Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:03:28.181792Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mzFIAcR1fUC/0/txH/ZNg7EFTR1nsZvc0A6V7fLLULCFsirHht7p2xg3WeYAkro9cUWjvtJdImj3muHw5R5xDw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:03:28.182257Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.09767","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a273cdae60393bf542f3cf1059efc51124cf7647e70a8fac043a56305b0d4612","sha256:2d98083364b2b7af56270a9656f8e2f833e97872d321a77da7f867410e8322b2"],"state_sha256":"55b13a18f549532cc515758e9778d7655ca9d3e62abcf6bb7161b8ff917f7546"}