{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:LJR3GEJUAWEPDXMAO5G4RDELNQ","short_pith_number":"pith:LJR3GEJU","canonical_record":{"source":{"id":"1809.08785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2018-09-24T07:43:05Z","cross_cats_sorted":[],"title_canon_sha256":"baee1ed5ce12074084b0c37b7854bcf27d10e0721c3e388aad169e133e52d8fa","abstract_canon_sha256":"a99b49fc7bab98694cbcb7acd9f4ec25002538cf142131613fd0db786cfc3eab"},"schema_version":"1.0"},"canonical_sha256":"5a63b311340588f1dd80774dc88c8b6c234fe95eb6d45b054f317b240f30b32c","source":{"kind":"arxiv","id":"1809.08785","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.08785","created_at":"2026-05-18T00:05:03Z"},{"alias_kind":"arxiv_version","alias_value":"1809.08785v1","created_at":"2026-05-18T00:05:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.08785","created_at":"2026-05-18T00:05:03Z"},{"alias_kind":"pith_short_12","alias_value":"LJR3GEJUAWEP","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LJR3GEJUAWEPDXMA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LJR3GEJU","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:LJR3GEJUAWEPDXMAO5G4RDELNQ","target":"record","payload":{"canonical_record":{"source":{"id":"1809.08785","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2018-09-24T07:43:05Z","cross_cats_sorted":[],"title_canon_sha256":"baee1ed5ce12074084b0c37b7854bcf27d10e0721c3e388aad169e133e52d8fa","abstract_canon_sha256":"a99b49fc7bab98694cbcb7acd9f4ec25002538cf142131613fd0db786cfc3eab"},"schema_version":"1.0"},"canonical_sha256":"5a63b311340588f1dd80774dc88c8b6c234fe95eb6d45b054f317b240f30b32c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:03.575395Z","signature_b64":"BnVmwNsNFKnhRxRgn1T8pIZhiObVHy9IAyKGmu5nrgHNE13ezCB+Hr8Q5BqYbemY1pQv3F8pSm7QoVcGZAHcCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5a63b311340588f1dd80774dc88c8b6c234fe95eb6d45b054f317b240f30b32c","last_reissued_at":"2026-05-18T00:05:03.574889Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:03.574889Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.08785","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":"2026-05-18T00:05:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CKMSg9fijE1tWuBail9Ja24LHAvDHj4oegp1a+ihfFE+17eMOO37o8cRmWULim/DtPDf7JPW9BuFanWLg2hhCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T00:47:08.142180Z"},"content_sha256":"512a0c5e6908a91566a342666179e0967b43ffdf32568cab941bca49580400d0","schema_version":"1.0","event_id":"sha256:512a0c5e6908a91566a342666179e0967b43ffdf32568cab941bca49580400d0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:LJR3GEJUAWEPDXMAO5G4RDELNQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Modeling non-linear spectral domain dependence using copulas with applications to rat local field potentials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"stat.AP","authors_text":"Charles Fontaine, Hernando Ombao, Ron D. Frostig","submitted_at":"2018-09-24T07:43:05Z","abstract_excerpt":"This paper intends to develop tools for characterizing non-linear spectral dependence between spontaneous brain signals. We use parametric copula models (both bivariate and vine models) applied on the magnitude of Fourier coefficients rather than using coherence. The motivation behind this work is an experiment on rats that studied the impact of stroke on the connectivity structure (dependence) between local field potentials recorded at various channels. We address the following major questions. First, we ask whether one can detect any changepoint in the regime of a brain channel for a given f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.08785","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":"2026-05-18T00:05:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CitTE7+1LJD0F1ZQ4/wUtVMI8n/hHeA8EZanVyYUXv+XRSsHqjlt8XuiNrouD6S4jMSgKbyPMtvPg3BFae+ADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T00:47:08.142903Z"},"content_sha256":"f4ea5dd72f7f71c18f6d7ebc53b36b7105c092cff61e042f1ceee610311e72ce","schema_version":"1.0","event_id":"sha256:f4ea5dd72f7f71c18f6d7ebc53b36b7105c092cff61e042f1ceee610311e72ce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LJR3GEJUAWEPDXMAO5G4RDELNQ/bundle.json","state_url":"https://pith.science/pith/LJR3GEJUAWEPDXMAO5G4RDELNQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LJR3GEJUAWEPDXMAO5G4RDELNQ/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":"2026-06-01T00:47:08Z","links":{"resolver":"https://pith.science/pith/LJR3GEJUAWEPDXMAO5G4RDELNQ","bundle":"https://pith.science/pith/LJR3GEJUAWEPDXMAO5G4RDELNQ/bundle.json","state":"https://pith.science/pith/LJR3GEJUAWEPDXMAO5G4RDELNQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LJR3GEJUAWEPDXMAO5G4RDELNQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LJR3GEJUAWEPDXMAO5G4RDELNQ","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":"a99b49fc7bab98694cbcb7acd9f4ec25002538cf142131613fd0db786cfc3eab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2018-09-24T07:43:05Z","title_canon_sha256":"baee1ed5ce12074084b0c37b7854bcf27d10e0721c3e388aad169e133e52d8fa"},"schema_version":"1.0","source":{"id":"1809.08785","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.08785","created_at":"2026-05-18T00:05:03Z"},{"alias_kind":"arxiv_version","alias_value":"1809.08785v1","created_at":"2026-05-18T00:05:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.08785","created_at":"2026-05-18T00:05:03Z"},{"alias_kind":"pith_short_12","alias_value":"LJR3GEJUAWEP","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LJR3GEJUAWEPDXMA","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LJR3GEJU","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:f4ea5dd72f7f71c18f6d7ebc53b36b7105c092cff61e042f1ceee610311e72ce","target":"graph","created_at":"2026-05-18T00:05:03Z","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":"This paper intends to develop tools for characterizing non-linear spectral dependence between spontaneous brain signals. We use parametric copula models (both bivariate and vine models) applied on the magnitude of Fourier coefficients rather than using coherence. The motivation behind this work is an experiment on rats that studied the impact of stroke on the connectivity structure (dependence) between local field potentials recorded at various channels. We address the following major questions. First, we ask whether one can detect any changepoint in the regime of a brain channel for a given f","authors_text":"Charles Fontaine, Hernando Ombao, Ron D. Frostig","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2018-09-24T07:43:05Z","title":"Modeling non-linear spectral domain dependence using copulas with applications to rat local field potentials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.08785","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":"sha256:512a0c5e6908a91566a342666179e0967b43ffdf32568cab941bca49580400d0","target":"record","created_at":"2026-05-18T00:05:03Z","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":"a99b49fc7bab98694cbcb7acd9f4ec25002538cf142131613fd0db786cfc3eab","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"stat.AP","submitted_at":"2018-09-24T07:43:05Z","title_canon_sha256":"baee1ed5ce12074084b0c37b7854bcf27d10e0721c3e388aad169e133e52d8fa"},"schema_version":"1.0","source":{"id":"1809.08785","kind":"arxiv","version":1}},"canonical_sha256":"5a63b311340588f1dd80774dc88c8b6c234fe95eb6d45b054f317b240f30b32c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a63b311340588f1dd80774dc88c8b6c234fe95eb6d45b054f317b240f30b32c","first_computed_at":"2026-05-18T00:05:03.574889Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:03.574889Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BnVmwNsNFKnhRxRgn1T8pIZhiObVHy9IAyKGmu5nrgHNE13ezCB+Hr8Q5BqYbemY1pQv3F8pSm7QoVcGZAHcCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:03.575395Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.08785","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:512a0c5e6908a91566a342666179e0967b43ffdf32568cab941bca49580400d0","sha256:f4ea5dd72f7f71c18f6d7ebc53b36b7105c092cff61e042f1ceee610311e72ce"],"state_sha256":"debd59a1061a9fc44fea460f2d11a7a58d46486c87bc51ba0910666689c62b92"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zVKiDApZr136BRkebUkthHBbhnTNk0bJOQlJnFVCvCIPvj+KMB5m6Tlaq1IdTi1aY/2Yh1LTgoQAlalqukefDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T00:47:08.146615Z","bundle_sha256":"b05b08f3dffb47c8cfd16a4493876ce7e8c476d754afd22e99b8ae8a5a907ae2"}}