{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:OLA2NKI2DQVAITAWVOYFLGYYRD","short_pith_number":"pith:OLA2NKI2","canonical_record":{"source":{"id":"1511.08410","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-26T15:09:59Z","cross_cats_sorted":[],"title_canon_sha256":"f09b9d41025dc2f823405cfbbb77f3690c292d1bc85e55b25e5adcb1b9be615f","abstract_canon_sha256":"66182259bc990ca44bfc3b9ce7d4f1985531d9e361a8a30c52cfd98b9b35963f"},"schema_version":"1.0"},"canonical_sha256":"72c1a6a91a1c2a044c16abb0559b1888fb25f5720a8acdf76b39f00fe99f7944","source":{"kind":"arxiv","id":"1511.08410","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.08410","created_at":"2026-05-18T01:25:54Z"},{"alias_kind":"arxiv_version","alias_value":"1511.08410v1","created_at":"2026-05-18T01:25:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.08410","created_at":"2026-05-18T01:25:54Z"},{"alias_kind":"pith_short_12","alias_value":"OLA2NKI2DQVA","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OLA2NKI2DQVAITAW","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OLA2NKI2","created_at":"2026-05-18T12:29:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:OLA2NKI2DQVAITAWVOYFLGYYRD","target":"record","payload":{"canonical_record":{"source":{"id":"1511.08410","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-26T15:09:59Z","cross_cats_sorted":[],"title_canon_sha256":"f09b9d41025dc2f823405cfbbb77f3690c292d1bc85e55b25e5adcb1b9be615f","abstract_canon_sha256":"66182259bc990ca44bfc3b9ce7d4f1985531d9e361a8a30c52cfd98b9b35963f"},"schema_version":"1.0"},"canonical_sha256":"72c1a6a91a1c2a044c16abb0559b1888fb25f5720a8acdf76b39f00fe99f7944","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:25:54.148983Z","signature_b64":"i7k3Z6Axu097lXy4u0e9+XZkQ7OBl92OC3bTGutWhC+C24Q4uvJlkH02+vxneB3cTfB1Vn0NwVcDLqoFSj8NDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72c1a6a91a1c2a044c16abb0559b1888fb25f5720a8acdf76b39f00fe99f7944","last_reissued_at":"2026-05-18T01:25:54.148344Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:25:54.148344Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.08410","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":"2026-05-18T01:25:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y+owOSxIsmBdg1BHlyfdkGx1bk5j2eaG2eAGGecvAuAUNeZstRpAgrcntJE79R0dzoLhqEm4WyebCkv65dmVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:26:41.096924Z"},"content_sha256":"37b67fce07d47341f053dced48909d52eaba31dfaeaf69eb762ed70be3a4dd8c","schema_version":"1.0","event_id":"sha256:37b67fce07d47341f053dced48909d52eaba31dfaeaf69eb762ed70be3a4dd8c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:OLA2NKI2DQVAITAWVOYFLGYYRD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling of anechoich chambers with equivalent materials and equivalent sources","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CE","authors_text":"Francesco Trevisan, Giovanni Solari, Lorenzo Codecasa, Matteo Cicuttin, Ruben Specogna, Silvano Chialina","submitted_at":"2015-11-26T15:09:59Z","abstract_excerpt":"Numerical simulation of anechoic chambers is a hot topic since it can provide useful data about the performance of the EMC site. However, the mathematical nature of the problem, the physical dimensions of the simulated sites and the frequency ranges pose nontrivial challenges to the simulation. Computational requirements in particular will quickly become unmanageable if adequate techniques are not employed. In this work we describe a novel approach, based on equivalent elements, that enables the simulation of large chambers with modest computational resources. The method is then validated agai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.08410","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":""},"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":"2026-05-18T01:25:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s4W1IdNBMwWPKJxtLEcmD9bol/1rC7EYoQruy0mYkfVCM0lhW8DoluTlp2hXrYuRo4EkiXKHZfJK21zAeVr1Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T22:26:41.097563Z"},"content_sha256":"05e6f869a79188fcc18be8fd9947cb71126285c984e6fddfb2a288fabfc26f85","schema_version":"1.0","event_id":"sha256:05e6f869a79188fcc18be8fd9947cb71126285c984e6fddfb2a288fabfc26f85"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OLA2NKI2DQVAITAWVOYFLGYYRD/bundle.json","state_url":"https://pith.science/pith/OLA2NKI2DQVAITAWVOYFLGYYRD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OLA2NKI2DQVAITAWVOYFLGYYRD/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":"2026-05-31T22:26:41Z","links":{"resolver":"https://pith.science/pith/OLA2NKI2DQVAITAWVOYFLGYYRD","bundle":"https://pith.science/pith/OLA2NKI2DQVAITAWVOYFLGYYRD/bundle.json","state":"https://pith.science/pith/OLA2NKI2DQVAITAWVOYFLGYYRD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OLA2NKI2DQVAITAWVOYFLGYYRD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:OLA2NKI2DQVAITAWVOYFLGYYRD","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":"66182259bc990ca44bfc3b9ce7d4f1985531d9e361a8a30c52cfd98b9b35963f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-26T15:09:59Z","title_canon_sha256":"f09b9d41025dc2f823405cfbbb77f3690c292d1bc85e55b25e5adcb1b9be615f"},"schema_version":"1.0","source":{"id":"1511.08410","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.08410","created_at":"2026-05-18T01:25:54Z"},{"alias_kind":"arxiv_version","alias_value":"1511.08410v1","created_at":"2026-05-18T01:25:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.08410","created_at":"2026-05-18T01:25:54Z"},{"alias_kind":"pith_short_12","alias_value":"OLA2NKI2DQVA","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_16","alias_value":"OLA2NKI2DQVAITAW","created_at":"2026-05-18T12:29:34Z"},{"alias_kind":"pith_short_8","alias_value":"OLA2NKI2","created_at":"2026-05-18T12:29:34Z"}],"graph_snapshots":[{"event_id":"sha256:05e6f869a79188fcc18be8fd9947cb71126285c984e6fddfb2a288fabfc26f85","target":"graph","created_at":"2026-05-18T01:25:54Z","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"},"paper":{"abstract_excerpt":"Numerical simulation of anechoic chambers is a hot topic since it can provide useful data about the performance of the EMC site. However, the mathematical nature of the problem, the physical dimensions of the simulated sites and the frequency ranges pose nontrivial challenges to the simulation. Computational requirements in particular will quickly become unmanageable if adequate techniques are not employed. In this work we describe a novel approach, based on equivalent elements, that enables the simulation of large chambers with modest computational resources. The method is then validated agai","authors_text":"Francesco Trevisan, Giovanni Solari, Lorenzo Codecasa, Matteo Cicuttin, Ruben Specogna, Silvano Chialina","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-26T15:09:59Z","title":"Modeling of anechoich chambers with equivalent materials and equivalent sources"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.08410","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":"sha256:37b67fce07d47341f053dced48909d52eaba31dfaeaf69eb762ed70be3a4dd8c","target":"record","created_at":"2026-05-18T01:25:54Z","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":"66182259bc990ca44bfc3b9ce7d4f1985531d9e361a8a30c52cfd98b9b35963f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CE","submitted_at":"2015-11-26T15:09:59Z","title_canon_sha256":"f09b9d41025dc2f823405cfbbb77f3690c292d1bc85e55b25e5adcb1b9be615f"},"schema_version":"1.0","source":{"id":"1511.08410","kind":"arxiv","version":1}},"canonical_sha256":"72c1a6a91a1c2a044c16abb0559b1888fb25f5720a8acdf76b39f00fe99f7944","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72c1a6a91a1c2a044c16abb0559b1888fb25f5720a8acdf76b39f00fe99f7944","first_computed_at":"2026-05-18T01:25:54.148344Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:25:54.148344Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i7k3Z6Axu097lXy4u0e9+XZkQ7OBl92OC3bTGutWhC+C24Q4uvJlkH02+vxneB3cTfB1Vn0NwVcDLqoFSj8NDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:25:54.148983Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.08410","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37b67fce07d47341f053dced48909d52eaba31dfaeaf69eb762ed70be3a4dd8c","sha256:05e6f869a79188fcc18be8fd9947cb71126285c984e6fddfb2a288fabfc26f85"],"state_sha256":"5b6ed55e19db25df14c1b3b7d7ad2cded397203800168572a213a139144ce80d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vR+7VuF7VnfsBZ3FLrDcQd5lRc136sdBXrpdR/3CPArbkIvYcGLCGvIQxTHaUOMbxdEPYwO2Nt5HIBgj44/UBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T22:26:41.101916Z","bundle_sha256":"4e6f65b7b7e8e81c7cbadee330c7f42c6bec00b07e737ef60246112b047fbdfa"}}