{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:V6BZ65LKFLCJB4BQVKJWQAYYP2","short_pith_number":"pith:V6BZ65LK","canonical_record":{"source":{"id":"0803.3047","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2008-03-20T18:29:47Z","cross_cats_sorted":["physics.data-an"],"title_canon_sha256":"aab482edd3ec44a5045bbe0a500f5386f2804c4919159982d5d4d869aed8d73e","abstract_canon_sha256":"7c8b54c74ebb5369cd10aa48eec5837e3290b95f31aec97e09b9ef4af72a2252"},"schema_version":"1.0"},"canonical_sha256":"af839f756a2ac490f030aa936803187eb61a1b29c731117ccf62792e0a92876f","source":{"kind":"arxiv","id":"0803.3047","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.3047","created_at":"2026-05-18T02:16:00Z"},{"alias_kind":"arxiv_version","alias_value":"0803.3047v3","created_at":"2026-05-18T02:16:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.3047","created_at":"2026-05-18T02:16:00Z"},{"alias_kind":"pith_short_12","alias_value":"V6BZ65LKFLCJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"V6BZ65LKFLCJB4BQ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"V6BZ65LK","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:V6BZ65LKFLCJB4BQVKJWQAYYP2","target":"record","payload":{"canonical_record":{"source":{"id":"0803.3047","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2008-03-20T18:29:47Z","cross_cats_sorted":["physics.data-an"],"title_canon_sha256":"aab482edd3ec44a5045bbe0a500f5386f2804c4919159982d5d4d869aed8d73e","abstract_canon_sha256":"7c8b54c74ebb5369cd10aa48eec5837e3290b95f31aec97e09b9ef4af72a2252"},"schema_version":"1.0"},"canonical_sha256":"af839f756a2ac490f030aa936803187eb61a1b29c731117ccf62792e0a92876f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:16:00.012556Z","signature_b64":"7IFI5J4vwGWkT2ccTKJ6wfvGzd8ls9vcLi7/yJoza3g3Vb3HyKdNfv8uDraEf+fpv7JnuujXU9VQ4er1r695AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"af839f756a2ac490f030aa936803187eb61a1b29c731117ccf62792e0a92876f","last_reissued_at":"2026-05-18T02:16:00.011916Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:16:00.011916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0803.3047","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:16:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RhZt/RWTgFQ6Eh2zA7qkEPKJbH1jNaenYwuQI82gTP5W87y4+YiIBRTYF6TrV+39CgJh4ZHsmW0Pmc5h400NAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T10:27:01.155552Z"},"content_sha256":"11ff5452120bbf4e76ddb0a405b65a1d1d0b2f5ca6d4fdc370dbf314fd73821a","schema_version":"1.0","event_id":"sha256:11ff5452120bbf4e76ddb0a405b65a1d1d0b2f5ca6d4fdc370dbf314fd73821a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:V6BZ65LKFLCJB4BQVKJWQAYYP2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A functional clustering algorithm for the analysis of dynamic network data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.data-an"],"primary_cat":"q-bio.NC","authors_text":"J. D. Berke, J. Waddell, M. Zochowski, S. Feldt, V. L. Hetrick","submitted_at":"2008-03-20T18:29:47Z","abstract_excerpt":"We formulate a novel technique for the detection of functional clusters in discrete event data. The advantage of this algorithm is that no prior knowledge of the number of functional groups is needed, as our procedure progressively combines data traces and derives the optimal clustering cutoff in a simple and intuitive manner through the use of surrogate data sets. In order to demonstrate the power of this algorithm to detect changes in network dynamics and connectivity, we apply it to both simulated neural spike train data and real neural data obtained from the mouse hippocampus during explor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.3047","kind":"arxiv","version":3},"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":"2026-05-18T02:16:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zQ0UJfN1pzw43vccGBUIHU47XeqhsXgnVkfiZfGAmdAnjfEQG4veil931YPe+kVMvQWdz2+SqzU1HP4AaUh5Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T10:27:01.155900Z"},"content_sha256":"0a658d58dc44ce58fdbbcdceb63692416b8d8bf193c79b40d089553236e300ca","schema_version":"1.0","event_id":"sha256:0a658d58dc44ce58fdbbcdceb63692416b8d8bf193c79b40d089553236e300ca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V6BZ65LKFLCJB4BQVKJWQAYYP2/bundle.json","state_url":"https://pith.science/pith/V6BZ65LKFLCJB4BQVKJWQAYYP2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V6BZ65LKFLCJB4BQVKJWQAYYP2/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":"2026-06-24T10:27:01Z","links":{"resolver":"https://pith.science/pith/V6BZ65LKFLCJB4BQVKJWQAYYP2","bundle":"https://pith.science/pith/V6BZ65LKFLCJB4BQVKJWQAYYP2/bundle.json","state":"https://pith.science/pith/V6BZ65LKFLCJB4BQVKJWQAYYP2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V6BZ65LKFLCJB4BQVKJWQAYYP2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:V6BZ65LKFLCJB4BQVKJWQAYYP2","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":"7c8b54c74ebb5369cd10aa48eec5837e3290b95f31aec97e09b9ef4af72a2252","cross_cats_sorted":["physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2008-03-20T18:29:47Z","title_canon_sha256":"aab482edd3ec44a5045bbe0a500f5386f2804c4919159982d5d4d869aed8d73e"},"schema_version":"1.0","source":{"id":"0803.3047","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0803.3047","created_at":"2026-05-18T02:16:00Z"},{"alias_kind":"arxiv_version","alias_value":"0803.3047v3","created_at":"2026-05-18T02:16:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0803.3047","created_at":"2026-05-18T02:16:00Z"},{"alias_kind":"pith_short_12","alias_value":"V6BZ65LKFLCJ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"V6BZ65LKFLCJB4BQ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"V6BZ65LK","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:0a658d58dc44ce58fdbbcdceb63692416b8d8bf193c79b40d089553236e300ca","target":"graph","created_at":"2026-05-18T02:16:00Z","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":"We formulate a novel technique for the detection of functional clusters in discrete event data. The advantage of this algorithm is that no prior knowledge of the number of functional groups is needed, as our procedure progressively combines data traces and derives the optimal clustering cutoff in a simple and intuitive manner through the use of surrogate data sets. In order to demonstrate the power of this algorithm to detect changes in network dynamics and connectivity, we apply it to both simulated neural spike train data and real neural data obtained from the mouse hippocampus during explor","authors_text":"J. D. Berke, J. Waddell, M. Zochowski, S. Feldt, V. L. Hetrick","cross_cats":["physics.data-an"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2008-03-20T18:29:47Z","title":"A functional clustering algorithm for the analysis of dynamic network data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0803.3047","kind":"arxiv","version":3},"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":"sha256:11ff5452120bbf4e76ddb0a405b65a1d1d0b2f5ca6d4fdc370dbf314fd73821a","target":"record","created_at":"2026-05-18T02:16:00Z","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":"7c8b54c74ebb5369cd10aa48eec5837e3290b95f31aec97e09b9ef4af72a2252","cross_cats_sorted":["physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.NC","submitted_at":"2008-03-20T18:29:47Z","title_canon_sha256":"aab482edd3ec44a5045bbe0a500f5386f2804c4919159982d5d4d869aed8d73e"},"schema_version":"1.0","source":{"id":"0803.3047","kind":"arxiv","version":3}},"canonical_sha256":"af839f756a2ac490f030aa936803187eb61a1b29c731117ccf62792e0a92876f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"af839f756a2ac490f030aa936803187eb61a1b29c731117ccf62792e0a92876f","first_computed_at":"2026-05-18T02:16:00.011916Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:00.011916Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7IFI5J4vwGWkT2ccTKJ6wfvGzd8ls9vcLi7/yJoza3g3Vb3HyKdNfv8uDraEf+fpv7JnuujXU9VQ4er1r695AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:00.012556Z","signed_message":"canonical_sha256_bytes"},"source_id":"0803.3047","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:11ff5452120bbf4e76ddb0a405b65a1d1d0b2f5ca6d4fdc370dbf314fd73821a","sha256:0a658d58dc44ce58fdbbcdceb63692416b8d8bf193c79b40d089553236e300ca"],"state_sha256":"cf90e2fb88540bb6f39bfc0aca0215460a887cea71b334f70b82596da741ded3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7wx5gtD/VEm5BGL/dC2s3AQ5oBcFlJZsLdY5pBDo1T2CtFnsmzo2g+upOqlgHzEd963WN6yCw5qQ7iLdoQKnBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T10:27:01.157860Z","bundle_sha256":"c6ddc684ddf05831f60ff6f7902d4ee5802b7e50bc2b545a80fb41d5da8aa048"}}