{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PXIORJ2TGORITC4EY6VC3RVXH3","short_pith_number":"pith:PXIORJ2T","canonical_record":{"source":{"id":"2109.00104","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-08-31T22:57:59Z","cross_cats_sorted":[],"title_canon_sha256":"fd2acd19d5fef4eb5eee7f14218164a755d6e5e55a531ee1aba296aae299debb","abstract_canon_sha256":"06d6d39a25911722236395ba5b8ca0019cfd66f2d186dc3ab5fc5205ad33f1aa"},"schema_version":"1.0"},"canonical_sha256":"7dd0e8a75333a2898b84c7aa2dc6b73ec5454659875779ae35e1e0ce99883002","source":{"kind":"arxiv","id":"2109.00104","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.00104","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"arxiv_version","alias_value":"2109.00104v4","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.00104","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"pith_short_12","alias_value":"PXIORJ2TGORI","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"pith_short_16","alias_value":"PXIORJ2TGORITC4E","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"pith_short_8","alias_value":"PXIORJ2T","created_at":"2026-07-05T08:33:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PXIORJ2TGORITC4EY6VC3RVXH3","target":"record","payload":{"canonical_record":{"source":{"id":"2109.00104","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-08-31T22:57:59Z","cross_cats_sorted":[],"title_canon_sha256":"fd2acd19d5fef4eb5eee7f14218164a755d6e5e55a531ee1aba296aae299debb","abstract_canon_sha256":"06d6d39a25911722236395ba5b8ca0019cfd66f2d186dc3ab5fc5205ad33f1aa"},"schema_version":"1.0"},"canonical_sha256":"7dd0e8a75333a2898b84c7aa2dc6b73ec5454659875779ae35e1e0ce99883002","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:33:22.593211Z","signature_b64":"LgDw7BG95++WAbgDTTL/Q2HWf/6uPopYnTXvxkdmF14KeqA8z3L6g86OhzVYmsBnQ1usRiNVO4Y09pqCT3hgBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7dd0e8a75333a2898b84c7aa2dc6b73ec5454659875779ae35e1e0ce99883002","last_reissued_at":"2026-07-05T08:33:22.592799Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:33:22.592799Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.00104","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:33:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RiZKbaK3NJIJSVn9+ZMdm71+ZIis7wzhVax96AoUtb+uxEjRV3PqEo0nFTlmz6M4BOGeaETpgyh9uqxrU8CjBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T15:11:20.331239Z"},"content_sha256":"17cb66af849f1cc0a1d1b0729a69084a23a5739a7dfbdbe18af5ed82e7664ca0","schema_version":"1.0","event_id":"sha256:17cb66af849f1cc0a1d1b0729a69084a23a5739a7dfbdbe18af5ed82e7664ca0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PXIORJ2TGORITC4EY6VC3RVXH3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"IWAVE -- An Adaptive Filter Approach to Phase Lock and the Dynamic Characterisation of Pseudo-Harmonic Waves","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ins-det","authors_text":"Edward J. Daw, Elliot L. Jones, Ian J. Hollows, Lilli Sun, Maxime Fays, Ross Kennedy, Tega B. Edo, Timesh Mistry","submitted_at":"2021-08-31T22:57:59Z","abstract_excerpt":"We present a novel adaptive filtering approach to the dynamic characterisation of waves of varying frequency and amplitude embedded in arbitrary noise backgrounds. This method, known as IWAVE, possesses critical advantages over conventional techniques making it a useful new tool in the dynamic characterisation of a wide range of data containing embedded oscillating signals. After a review of existing techniques, we present the IWAVE algorithm, derive its key characteristics, and provide tests of its performance using simulated and real world data."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.00104","kind":"arxiv","version":4},"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/2109.00104/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":"2026-07-05T08:33:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iCfYrVxloPbZjvm/BwUVFxzmOG3ZyqS+Jws+UmlNtrICEfJylEt6sQNd0ErNTJY82gpqSRlir5F/3+ZwK2eOBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T15:11:20.331633Z"},"content_sha256":"0a9dc8169b199da65aa573444f6d66fb9cec0762b70060a989d5027e320b9d63","schema_version":"1.0","event_id":"sha256:0a9dc8169b199da65aa573444f6d66fb9cec0762b70060a989d5027e320b9d63"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PXIORJ2TGORITC4EY6VC3RVXH3/bundle.json","state_url":"https://pith.science/pith/PXIORJ2TGORITC4EY6VC3RVXH3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PXIORJ2TGORITC4EY6VC3RVXH3/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":"2026-07-06T15:11:20Z","links":{"resolver":"https://pith.science/pith/PXIORJ2TGORITC4EY6VC3RVXH3","bundle":"https://pith.science/pith/PXIORJ2TGORITC4EY6VC3RVXH3/bundle.json","state":"https://pith.science/pith/PXIORJ2TGORITC4EY6VC3RVXH3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PXIORJ2TGORITC4EY6VC3RVXH3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PXIORJ2TGORITC4EY6VC3RVXH3","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":"06d6d39a25911722236395ba5b8ca0019cfd66f2d186dc3ab5fc5205ad33f1aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-08-31T22:57:59Z","title_canon_sha256":"fd2acd19d5fef4eb5eee7f14218164a755d6e5e55a531ee1aba296aae299debb"},"schema_version":"1.0","source":{"id":"2109.00104","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.00104","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"arxiv_version","alias_value":"2109.00104v4","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.00104","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"pith_short_12","alias_value":"PXIORJ2TGORI","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"pith_short_16","alias_value":"PXIORJ2TGORITC4E","created_at":"2026-07-05T08:33:22Z"},{"alias_kind":"pith_short_8","alias_value":"PXIORJ2T","created_at":"2026-07-05T08:33:22Z"}],"graph_snapshots":[{"event_id":"sha256:0a9dc8169b199da65aa573444f6d66fb9cec0762b70060a989d5027e320b9d63","target":"graph","created_at":"2026-07-05T08:33:22Z","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/2109.00104/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a novel adaptive filtering approach to the dynamic characterisation of waves of varying frequency and amplitude embedded in arbitrary noise backgrounds. This method, known as IWAVE, possesses critical advantages over conventional techniques making it a useful new tool in the dynamic characterisation of a wide range of data containing embedded oscillating signals. After a review of existing techniques, we present the IWAVE algorithm, derive its key characteristics, and provide tests of its performance using simulated and real world data.","authors_text":"Edward J. Daw, Elliot L. Jones, Ian J. Hollows, Lilli Sun, Maxime Fays, Ross Kennedy, Tega B. Edo, Timesh Mistry","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-08-31T22:57:59Z","title":"IWAVE -- An Adaptive Filter Approach to Phase Lock and the Dynamic Characterisation of Pseudo-Harmonic Waves"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.00104","kind":"arxiv","version":4},"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":"sha256:17cb66af849f1cc0a1d1b0729a69084a23a5739a7dfbdbe18af5ed82e7664ca0","target":"record","created_at":"2026-07-05T08:33:22Z","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":"06d6d39a25911722236395ba5b8ca0019cfd66f2d186dc3ab5fc5205ad33f1aa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2021-08-31T22:57:59Z","title_canon_sha256":"fd2acd19d5fef4eb5eee7f14218164a755d6e5e55a531ee1aba296aae299debb"},"schema_version":"1.0","source":{"id":"2109.00104","kind":"arxiv","version":4}},"canonical_sha256":"7dd0e8a75333a2898b84c7aa2dc6b73ec5454659875779ae35e1e0ce99883002","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7dd0e8a75333a2898b84c7aa2dc6b73ec5454659875779ae35e1e0ce99883002","first_computed_at":"2026-07-05T08:33:22.592799Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:33:22.592799Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LgDw7BG95++WAbgDTTL/Q2HWf/6uPopYnTXvxkdmF14KeqA8z3L6g86OhzVYmsBnQ1usRiNVO4Y09pqCT3hgBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:33:22.593211Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.00104","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17cb66af849f1cc0a1d1b0729a69084a23a5739a7dfbdbe18af5ed82e7664ca0","sha256:0a9dc8169b199da65aa573444f6d66fb9cec0762b70060a989d5027e320b9d63"],"state_sha256":"d8ca18521dcc99cf32e13242aaf129b971175aff8a90f5524dafe362824efe66"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"omrkGpVIvZ0csXeg3kD5eletKTvjSeAriUMcQzofl8oTvo3qfrhXsC/bDQ1oTr8g1RA7t8bNkPZj6q+whX83Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T15:11:20.333620Z","bundle_sha256":"3f14f5a4bd9c4bbf0b3a6ee6d4f5f25cbbc0529daea8df625045e18eec8168bd"}}