{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:44F2TBQUMFIGJYSE4FHILATBOG","short_pith_number":"pith:44F2TBQU","canonical_record":{"source":{"id":"1008.4176","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2010-08-22T00:41:12Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"c743a35423e6bc917a28c2e891dde328dce418c802223783e38eb5cc158a7fb0","abstract_canon_sha256":"8589a922b1c2d2fecfaa17c94155a79bc1c0ce81045d0f2d85698f45610f8346"},"schema_version":"1.0"},"canonical_sha256":"e70ba98614615064e244e14e85826171bafc9d6502c20506beba86416d9cad9d","source":{"kind":"arxiv","id":"1008.4176","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.4176","created_at":"2026-05-18T04:41:53Z"},{"alias_kind":"arxiv_version","alias_value":"1008.4176v1","created_at":"2026-05-18T04:41:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.4176","created_at":"2026-05-18T04:41:53Z"},{"alias_kind":"pith_short_12","alias_value":"44F2TBQUMFIG","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"44F2TBQUMFIGJYSE","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"44F2TBQU","created_at":"2026-05-18T12:26:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:44F2TBQUMFIGJYSE4FHILATBOG","target":"record","payload":{"canonical_record":{"source":{"id":"1008.4176","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2010-08-22T00:41:12Z","cross_cats_sorted":["physics.geo-ph"],"title_canon_sha256":"c743a35423e6bc917a28c2e891dde328dce418c802223783e38eb5cc158a7fb0","abstract_canon_sha256":"8589a922b1c2d2fecfaa17c94155a79bc1c0ce81045d0f2d85698f45610f8346"},"schema_version":"1.0"},"canonical_sha256":"e70ba98614615064e244e14e85826171bafc9d6502c20506beba86416d9cad9d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:41:53.537134Z","signature_b64":"8z2zJ4Zig6OsozSqwR21SKAn9neeQQwwmorOA90d9QDp0rFrt6gTD97GGFmKB3nIGx3nEcNFYhFkfHaV3WT/DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e70ba98614615064e244e14e85826171bafc9d6502c20506beba86416d9cad9d","last_reissued_at":"2026-05-18T04:41:53.536513Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:41:53.536513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1008.4176","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":"2026-05-18T04:41:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xARyMKPILbISeSL/zIls6HeF3sBBaDAhM21nONs3W6zx7KiFwVn7tvQZg0BeuwTSN67rjvfX7vs0nvcwzraRBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T22:28:45.661705Z"},"content_sha256":"cb15a6c08264bd0b97178f0e6c334d424e0a806f3516f06fcb6d34d86ae5085c","schema_version":"1.0","event_id":"sha256:cb15a6c08264bd0b97178f0e6c334d424e0a806f3516f06fcb6d34d86ae5085c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:44F2TBQUMFIGJYSE4FHILATBOG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Noise Corruption of Empirical Mode Decomposition and Its Effect on Instantaneous Frequency","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.geo-ph"],"primary_cat":"physics.data-an","authors_text":"Daniel N. Kaslovsky, Francois G. Meyer","submitted_at":"2010-08-22T00:41:12Z","abstract_excerpt":"Huang's Empirical Mode Decomposition (EMD) is an algorithm for analyzing nonstationary data that provides a localized time-frequency representation by decomposing the data into adaptively defined modes. EMD can be used to estimate a signal's instantaneous frequency (IF) but suffers from poor performance in the presence of noise. To produce a meaningful IF, each mode of the decomposition must be nearly monochromatic, a condition that is not guaranteed by the algorithm and fails to be met when the signal is corrupted by noise. In this work, the extraction of modes containing both signal and nois"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.4176","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":"2026-05-18T04:41:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HFm67IOX2XONgTTEuY8G2x+0RDLf3DwiuCD8xf5/6E7uXTL9nuNqREkBp3iwoJQE6lU9SY5AY25uj0S7hoeNCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T22:28:45.662058Z"},"content_sha256":"111bd4d83f0e3f7c884149d73ebe1103c08f30c29aa5640439edd62a57536625","schema_version":"1.0","event_id":"sha256:111bd4d83f0e3f7c884149d73ebe1103c08f30c29aa5640439edd62a57536625"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/44F2TBQUMFIGJYSE4FHILATBOG/bundle.json","state_url":"https://pith.science/pith/44F2TBQUMFIGJYSE4FHILATBOG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/44F2TBQUMFIGJYSE4FHILATBOG/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":"2026-06-23T22:28:45Z","links":{"resolver":"https://pith.science/pith/44F2TBQUMFIGJYSE4FHILATBOG","bundle":"https://pith.science/pith/44F2TBQUMFIGJYSE4FHILATBOG/bundle.json","state":"https://pith.science/pith/44F2TBQUMFIGJYSE4FHILATBOG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/44F2TBQUMFIGJYSE4FHILATBOG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:44F2TBQUMFIGJYSE4FHILATBOG","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":"8589a922b1c2d2fecfaa17c94155a79bc1c0ce81045d0f2d85698f45610f8346","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2010-08-22T00:41:12Z","title_canon_sha256":"c743a35423e6bc917a28c2e891dde328dce418c802223783e38eb5cc158a7fb0"},"schema_version":"1.0","source":{"id":"1008.4176","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.4176","created_at":"2026-05-18T04:41:53Z"},{"alias_kind":"arxiv_version","alias_value":"1008.4176v1","created_at":"2026-05-18T04:41:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.4176","created_at":"2026-05-18T04:41:53Z"},{"alias_kind":"pith_short_12","alias_value":"44F2TBQUMFIG","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_16","alias_value":"44F2TBQUMFIGJYSE","created_at":"2026-05-18T12:26:03Z"},{"alias_kind":"pith_short_8","alias_value":"44F2TBQU","created_at":"2026-05-18T12:26:03Z"}],"graph_snapshots":[{"event_id":"sha256:111bd4d83f0e3f7c884149d73ebe1103c08f30c29aa5640439edd62a57536625","target":"graph","created_at":"2026-05-18T04:41:53Z","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":"Huang's Empirical Mode Decomposition (EMD) is an algorithm for analyzing nonstationary data that provides a localized time-frequency representation by decomposing the data into adaptively defined modes. EMD can be used to estimate a signal's instantaneous frequency (IF) but suffers from poor performance in the presence of noise. To produce a meaningful IF, each mode of the decomposition must be nearly monochromatic, a condition that is not guaranteed by the algorithm and fails to be met when the signal is corrupted by noise. In this work, the extraction of modes containing both signal and nois","authors_text":"Daniel N. Kaslovsky, Francois G. Meyer","cross_cats":["physics.geo-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2010-08-22T00:41:12Z","title":"Noise Corruption of Empirical Mode Decomposition and Its Effect on Instantaneous Frequency"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.4176","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:cb15a6c08264bd0b97178f0e6c334d424e0a806f3516f06fcb6d34d86ae5085c","target":"record","created_at":"2026-05-18T04:41:53Z","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":"8589a922b1c2d2fecfaa17c94155a79bc1c0ce81045d0f2d85698f45610f8346","cross_cats_sorted":["physics.geo-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2010-08-22T00:41:12Z","title_canon_sha256":"c743a35423e6bc917a28c2e891dde328dce418c802223783e38eb5cc158a7fb0"},"schema_version":"1.0","source":{"id":"1008.4176","kind":"arxiv","version":1}},"canonical_sha256":"e70ba98614615064e244e14e85826171bafc9d6502c20506beba86416d9cad9d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e70ba98614615064e244e14e85826171bafc9d6502c20506beba86416d9cad9d","first_computed_at":"2026-05-18T04:41:53.536513Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:41:53.536513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8z2zJ4Zig6OsozSqwR21SKAn9neeQQwwmorOA90d9QDp0rFrt6gTD97GGFmKB3nIGx3nEcNFYhFkfHaV3WT/DA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:41:53.537134Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.4176","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb15a6c08264bd0b97178f0e6c334d424e0a806f3516f06fcb6d34d86ae5085c","sha256:111bd4d83f0e3f7c884149d73ebe1103c08f30c29aa5640439edd62a57536625"],"state_sha256":"c705ce845322f2e48a5fad7b213eecb1546dd0c92b36540b57b876ee1fdbcda7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rxoOuJ8KHqtS5FRhwos5ccFwcSVWtK2ktkjFnw40vxPBgdt0xTlAAvZ65vCeinc+FbBKrD3y8L2RGyYBFt7RAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T22:28:45.664065Z","bundle_sha256":"d095b0c1a291ce511a9e847ace0497c0300d971747d56f8213ab0f5c969bad23"}}