{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:BEDDIPKHIMHXAVW3ZKOI5WDZMK","short_pith_number":"pith:BEDDIPKH","canonical_record":{"source":{"id":"2507.19653","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2025-07-25T19:58:44Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"c9b36b9025d45db181dd6d57aa778826d7396f1aa2044ca8dda9bab37a50b37b","abstract_canon_sha256":"72e5e439f34fbfd14c1ff6d9c15f72248681c5b8d64c003a6c3ad70e599a0f64"},"schema_version":"1.0"},"canonical_sha256":"0906343d47430f7056dbca9c8ed879628f9319efdee18b9f40f6d325031dfb6c","source":{"kind":"arxiv","id":"2507.19653","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.19653","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"arxiv_version","alias_value":"2507.19653v2","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.19653","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"pith_short_12","alias_value":"BEDDIPKHIMHX","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"pith_short_16","alias_value":"BEDDIPKHIMHXAVW3","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"pith_short_8","alias_value":"BEDDIPKH","created_at":"2026-06-19T16:12:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:BEDDIPKHIMHXAVW3ZKOI5WDZMK","target":"record","payload":{"canonical_record":{"source":{"id":"2507.19653","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2025-07-25T19:58:44Z","cross_cats_sorted":["cs.AI","cs.LG"],"title_canon_sha256":"c9b36b9025d45db181dd6d57aa778826d7396f1aa2044ca8dda9bab37a50b37b","abstract_canon_sha256":"72e5e439f34fbfd14c1ff6d9c15f72248681c5b8d64c003a6c3ad70e599a0f64"},"schema_version":"1.0"},"canonical_sha256":"0906343d47430f7056dbca9c8ed879628f9319efdee18b9f40f6d325031dfb6c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-19T16:12:14.405268Z","signature_b64":"O9w7rzvBCP6E/udL490zeXJTBd1Yy75sGp0sxrlgCpV9TwHmUcvcL6zsBRy1u9XyWrEa+0e4Vit5/x9TM4AABw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0906343d47430f7056dbca9c8ed879628f9319efdee18b9f40f6d325031dfb6c","last_reissued_at":"2026-06-19T16:12:14.404836Z","signature_status":"signed_v1","first_computed_at":"2026-06-19T16:12:14.404836Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.19653","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":"2026-06-19T16:12:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v+HfXDooXEQ69qEql7S0vZyHbHKI0eRlYiKKWw46EW/QO5Suzm38bAj87Ukp48c0i9IVZMSOUMkUIKjDlDzyCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T17:00:46.963145Z"},"content_sha256":"d79cace66949ea3a649d4e042a17e7eed90ba416d46fdbb848e79480ab506ce1","schema_version":"1.0","event_id":"sha256:d79cace66949ea3a649d4e042a17e7eed90ba416d46fdbb848e79480ab506ce1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:BEDDIPKHIMHXAVW3ZKOI5WDZMK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the Limitations of Ray-Tracing for Learning-Based RF Tasks in Urban Environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.AI","cs.LG"],"primary_cat":"cs.NI","authors_text":"Armen Manukyan, Edvard Ghukasyan, Hrant Khachatrian, Theofanis P. Raptis","submitted_at":"2025-07-25T19:58:44Z","abstract_excerpt":"We study the realism of Sionna v1.0.2 ray-tracing for outdoor cellular links in central Rome. We use a real measurement set of 1,664 user-equipments (UEs) and six nominal base-station (BS) sites. Using these fixed positions we systematically vary the main simulation parameters, including path depth, diffuse/specular/refraction flags, carrier frequency, as well as antenna's properties like its altitude, radiation pattern, and orientation. Simulator fidelity is scored for each base station via Spearman correlation between measured and simulated powers, and by a fingerprint-based k-nearest-neighb"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.19653","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/2507.19653/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":"2026-06-19T16:12:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d4I3jEiuxlsh6gjLUiRuUTzpUsiZ9O3enlitYucyH7SKI0UTzoTgMb3Sc01KxcyiMx//oudRXD+TDBYfxaOJDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T17:00:46.963532Z"},"content_sha256":"2ea871ee102626f3b28a79120213d22c346e2ccf90b68bef291a1d19b61f7031","schema_version":"1.0","event_id":"sha256:2ea871ee102626f3b28a79120213d22c346e2ccf90b68bef291a1d19b61f7031"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BEDDIPKHIMHXAVW3ZKOI5WDZMK/bundle.json","state_url":"https://pith.science/pith/BEDDIPKHIMHXAVW3ZKOI5WDZMK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BEDDIPKHIMHXAVW3ZKOI5WDZMK/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":"2026-07-01T17:00:46Z","links":{"resolver":"https://pith.science/pith/BEDDIPKHIMHXAVW3ZKOI5WDZMK","bundle":"https://pith.science/pith/BEDDIPKHIMHXAVW3ZKOI5WDZMK/bundle.json","state":"https://pith.science/pith/BEDDIPKHIMHXAVW3ZKOI5WDZMK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BEDDIPKHIMHXAVW3ZKOI5WDZMK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:BEDDIPKHIMHXAVW3ZKOI5WDZMK","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":"72e5e439f34fbfd14c1ff6d9c15f72248681c5b8d64c003a6c3ad70e599a0f64","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2025-07-25T19:58:44Z","title_canon_sha256":"c9b36b9025d45db181dd6d57aa778826d7396f1aa2044ca8dda9bab37a50b37b"},"schema_version":"1.0","source":{"id":"2507.19653","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.19653","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"arxiv_version","alias_value":"2507.19653v2","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.19653","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"pith_short_12","alias_value":"BEDDIPKHIMHX","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"pith_short_16","alias_value":"BEDDIPKHIMHXAVW3","created_at":"2026-06-19T16:12:14Z"},{"alias_kind":"pith_short_8","alias_value":"BEDDIPKH","created_at":"2026-06-19T16:12:14Z"}],"graph_snapshots":[{"event_id":"sha256:2ea871ee102626f3b28a79120213d22c346e2ccf90b68bef291a1d19b61f7031","target":"graph","created_at":"2026-06-19T16:12:14Z","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/2507.19653/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study the realism of Sionna v1.0.2 ray-tracing for outdoor cellular links in central Rome. We use a real measurement set of 1,664 user-equipments (UEs) and six nominal base-station (BS) sites. Using these fixed positions we systematically vary the main simulation parameters, including path depth, diffuse/specular/refraction flags, carrier frequency, as well as antenna's properties like its altitude, radiation pattern, and orientation. Simulator fidelity is scored for each base station via Spearman correlation between measured and simulated powers, and by a fingerprint-based k-nearest-neighb","authors_text":"Armen Manukyan, Edvard Ghukasyan, Hrant Khachatrian, Theofanis P. Raptis","cross_cats":["cs.AI","cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2025-07-25T19:58:44Z","title":"On the Limitations of Ray-Tracing for Learning-Based RF Tasks in Urban Environments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.19653","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:d79cace66949ea3a649d4e042a17e7eed90ba416d46fdbb848e79480ab506ce1","target":"record","created_at":"2026-06-19T16:12:14Z","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":"72e5e439f34fbfd14c1ff6d9c15f72248681c5b8d64c003a6c3ad70e599a0f64","cross_cats_sorted":["cs.AI","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2025-07-25T19:58:44Z","title_canon_sha256":"c9b36b9025d45db181dd6d57aa778826d7396f1aa2044ca8dda9bab37a50b37b"},"schema_version":"1.0","source":{"id":"2507.19653","kind":"arxiv","version":2}},"canonical_sha256":"0906343d47430f7056dbca9c8ed879628f9319efdee18b9f40f6d325031dfb6c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0906343d47430f7056dbca9c8ed879628f9319efdee18b9f40f6d325031dfb6c","first_computed_at":"2026-06-19T16:12:14.404836Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-19T16:12:14.404836Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"O9w7rzvBCP6E/udL490zeXJTBd1Yy75sGp0sxrlgCpV9TwHmUcvcL6zsBRy1u9XyWrEa+0e4Vit5/x9TM4AABw==","signature_status":"signed_v1","signed_at":"2026-06-19T16:12:14.405268Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.19653","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d79cace66949ea3a649d4e042a17e7eed90ba416d46fdbb848e79480ab506ce1","sha256:2ea871ee102626f3b28a79120213d22c346e2ccf90b68bef291a1d19b61f7031"],"state_sha256":"9eb54fcea4681cebe61a9708fb8edbf567884cdc4722834ee8ea0468abf3c966"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"61iNMT4Z8LLqb7rtNERIH8uRgeRdGwRthV3/LFKtCHiUXXnIOTOnIqU8BB/PyNlQ5uuj22o+nbJ4K/c9vfquDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T17:00:46.965642Z","bundle_sha256":"b14e13a5e2b14e19bd6ba606c5ea39366bbce71741313d59110875148f761438"}}