{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:YHUBJI3SAFAUMOQ5XW2C6NSUD7","short_pith_number":"pith:YHUBJI3S","canonical_record":{"source":{"id":"2412.06714","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2024-12-09T18:02:17Z","cross_cats_sorted":[],"title_canon_sha256":"2e32a2bf96e8a6029e96aa94680a0db45178ea79af41e9d48e47eb40e1e88d65","abstract_canon_sha256":"b90b54b0a2fe0bcbf7dd4d1d504050fef3bc3cd8d275e730f34814d4b4f8da50"},"schema_version":"1.0"},"canonical_sha256":"c1e814a3720141463a1dbdb42f36541fdf7b4e943127ca5032d010c00ff5bbaa","source":{"kind":"arxiv","id":"2412.06714","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.06714","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"arxiv_version","alias_value":"2412.06714v1","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.06714","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"pith_short_12","alias_value":"YHUBJI3SAFAU","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"pith_short_16","alias_value":"YHUBJI3SAFAUMOQ5","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"pith_short_8","alias_value":"YHUBJI3S","created_at":"2026-07-05T09:46:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:YHUBJI3SAFAUMOQ5XW2C6NSUD7","target":"record","payload":{"canonical_record":{"source":{"id":"2412.06714","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2024-12-09T18:02:17Z","cross_cats_sorted":[],"title_canon_sha256":"2e32a2bf96e8a6029e96aa94680a0db45178ea79af41e9d48e47eb40e1e88d65","abstract_canon_sha256":"b90b54b0a2fe0bcbf7dd4d1d504050fef3bc3cd8d275e730f34814d4b4f8da50"},"schema_version":"1.0"},"canonical_sha256":"c1e814a3720141463a1dbdb42f36541fdf7b4e943127ca5032d010c00ff5bbaa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:46:36.934511Z","signature_b64":"JiGud8holcaqj/SPKaIkbiw8eLh4rswy7Yk3xkiz2QHYJJjjaE8UUk8X+TFsi3FGFed7qxLE6ydGzMfRC194Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c1e814a3720141463a1dbdb42f36541fdf7b4e943127ca5032d010c00ff5bbaa","last_reissued_at":"2026-07-05T09:46:36.933963Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:46:36.933963Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2412.06714","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":"2026-07-05T09:46:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"83i+ky2+QzCChtMt25yc3FIC9I7mxWrPhAYKfDlRTw1KONBZOZXbgSTbv14sEimtJXC6ymcdtT9ocPOHac9zCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T13:56:26.985891Z"},"content_sha256":"64ebc6d01a33964df80595dbf0466b8dd961ec0f1c899c59c8908398c17ae603","schema_version":"1.0","event_id":"sha256:64ebc6d01a33964df80595dbf0466b8dd961ec0f1c899c59c8908398c17ae603"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:YHUBJI3SAFAUMOQ5XW2C6NSUD7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Equivalent Circuit Modeling and Design of a Reconfigurable Loaded Dogbone Metasurface Element","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Christopher T. Howard, Kenneth W. Allen, William D. Hunt","submitted_at":"2024-12-09T18:02:17Z","abstract_excerpt":"The accelerating trend of active metasurfaces -- such as those incorporating non-Foster matching, programmable control, or space-time modulation -- adds complexity to the computational electromagnetic (CEM) simulation landscape. In this work, we present an equivalent circuit model (ECM) for a particular periodic array element -- the dogbone element -- that incorporates an arbitrary sub-cell electronic circuit. The ECM is capable of predicting the overall surface impedance with any changes in the circuit's impedance. Three full-wave CEM simulations fully determine the EC, and the scattering par"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.06714","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2412.06714/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":"2026-07-05T09:46:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n9RiIugOjhIQwVJpfrGo9qu3rg8cOWDOy/ANkTi1ma+tc7/IpKXIo6qg40t0oA9vKOk/89/UmGBN3BGc0mc6Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T13:56:26.986760Z"},"content_sha256":"3cdbfdd950672270410aebdae557517b1dfb24596570b37bde13d592ffcc868d","schema_version":"1.0","event_id":"sha256:3cdbfdd950672270410aebdae557517b1dfb24596570b37bde13d592ffcc868d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YHUBJI3SAFAUMOQ5XW2C6NSUD7/bundle.json","state_url":"https://pith.science/pith/YHUBJI3SAFAUMOQ5XW2C6NSUD7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YHUBJI3SAFAUMOQ5XW2C6NSUD7/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":"2026-08-14T13:56:26Z","links":{"resolver":"https://pith.science/pith/YHUBJI3SAFAUMOQ5XW2C6NSUD7","bundle":"https://pith.science/pith/YHUBJI3SAFAUMOQ5XW2C6NSUD7/bundle.json","state":"https://pith.science/pith/YHUBJI3SAFAUMOQ5XW2C6NSUD7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YHUBJI3SAFAUMOQ5XW2C6NSUD7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:YHUBJI3SAFAUMOQ5XW2C6NSUD7","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":"b90b54b0a2fe0bcbf7dd4d1d504050fef3bc3cd8d275e730f34814d4b4f8da50","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2024-12-09T18:02:17Z","title_canon_sha256":"2e32a2bf96e8a6029e96aa94680a0db45178ea79af41e9d48e47eb40e1e88d65"},"schema_version":"1.0","source":{"id":"2412.06714","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2412.06714","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"arxiv_version","alias_value":"2412.06714v1","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2412.06714","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"pith_short_12","alias_value":"YHUBJI3SAFAU","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"pith_short_16","alias_value":"YHUBJI3SAFAUMOQ5","created_at":"2026-07-05T09:46:36Z"},{"alias_kind":"pith_short_8","alias_value":"YHUBJI3S","created_at":"2026-07-05T09:46:36Z"}],"graph_snapshots":[{"event_id":"sha256:3cdbfdd950672270410aebdae557517b1dfb24596570b37bde13d592ffcc868d","target":"graph","created_at":"2026-07-05T09:46:36Z","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/2412.06714/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The accelerating trend of active metasurfaces -- such as those incorporating non-Foster matching, programmable control, or space-time modulation -- adds complexity to the computational electromagnetic (CEM) simulation landscape. In this work, we present an equivalent circuit model (ECM) for a particular periodic array element -- the dogbone element -- that incorporates an arbitrary sub-cell electronic circuit. The ECM is capable of predicting the overall surface impedance with any changes in the circuit's impedance. Three full-wave CEM simulations fully determine the EC, and the scattering par","authors_text":"Christopher T. Howard, Kenneth W. Allen, William D. Hunt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2024-12-09T18:02:17Z","title":"Equivalent Circuit Modeling and Design of a Reconfigurable Loaded Dogbone Metasurface Element"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2412.06714","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":"sha256:64ebc6d01a33964df80595dbf0466b8dd961ec0f1c899c59c8908398c17ae603","target":"record","created_at":"2026-07-05T09:46:36Z","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":"b90b54b0a2fe0bcbf7dd4d1d504050fef3bc3cd8d275e730f34814d4b4f8da50","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2024-12-09T18:02:17Z","title_canon_sha256":"2e32a2bf96e8a6029e96aa94680a0db45178ea79af41e9d48e47eb40e1e88d65"},"schema_version":"1.0","source":{"id":"2412.06714","kind":"arxiv","version":1}},"canonical_sha256":"c1e814a3720141463a1dbdb42f36541fdf7b4e943127ca5032d010c00ff5bbaa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c1e814a3720141463a1dbdb42f36541fdf7b4e943127ca5032d010c00ff5bbaa","first_computed_at":"2026-07-05T09:46:36.933963Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:46:36.933963Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JiGud8holcaqj/SPKaIkbiw8eLh4rswy7Yk3xkiz2QHYJJjjaE8UUk8X+TFsi3FGFed7qxLE6ydGzMfRC194Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T09:46:36.934511Z","signed_message":"canonical_sha256_bytes"},"source_id":"2412.06714","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:64ebc6d01a33964df80595dbf0466b8dd961ec0f1c899c59c8908398c17ae603","sha256:3cdbfdd950672270410aebdae557517b1dfb24596570b37bde13d592ffcc868d"],"state_sha256":"a65474e2741f8f78c62e99af4a1e090a36cfb1ba470e70535f15264d3578454e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LMJnwxxm0xKEMvptLMALOXyG/sAa97oaLJDZ2kur66gCa8XW8/TG1EJwq6qhLYp2vKD3NnTyyX6ZbEbDrv5UAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T13:56:26.993997Z","bundle_sha256":"451534282b60bc6be28ef6060ea0ee9bedb385f525689716cd7429842150329e"}}