{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:QJ2GPNIYNFKXBQ2GQT7JM7QLXK","short_pith_number":"pith:QJ2GPNIY","canonical_record":{"source":{"id":"0909.0885","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2009-09-04T14:25:29Z","cross_cats_sorted":[],"title_canon_sha256":"9fd227581b7fc31011ee0009f9f12a9c79da6622a45a9eb89610c7bc8bf67d25","abstract_canon_sha256":"cfd0aa3152ba97e49df6717ad4d49a6e9ee18dcce38a48b2f8cfb724ea0b0202"},"schema_version":"1.0"},"canonical_sha256":"827467b518695570c34684fe967e0bba987b82ad1c52743ba95510281b058b24","source":{"kind":"arxiv","id":"0909.0885","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.0885","created_at":"2026-05-18T03:08:16Z"},{"alias_kind":"arxiv_version","alias_value":"0909.0885v1","created_at":"2026-05-18T03:08:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.0885","created_at":"2026-05-18T03:08:16Z"},{"alias_kind":"pith_short_12","alias_value":"QJ2GPNIYNFKX","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"QJ2GPNIYNFKXBQ2G","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"QJ2GPNIY","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:QJ2GPNIYNFKXBQ2GQT7JM7QLXK","target":"record","payload":{"canonical_record":{"source":{"id":"0909.0885","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2009-09-04T14:25:29Z","cross_cats_sorted":[],"title_canon_sha256":"9fd227581b7fc31011ee0009f9f12a9c79da6622a45a9eb89610c7bc8bf67d25","abstract_canon_sha256":"cfd0aa3152ba97e49df6717ad4d49a6e9ee18dcce38a48b2f8cfb724ea0b0202"},"schema_version":"1.0"},"canonical_sha256":"827467b518695570c34684fe967e0bba987b82ad1c52743ba95510281b058b24","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:08:16.123666Z","signature_b64":"6vee/+3Er2cZm/be6QKp9Hx2rf9eCFTsPqHgcC0biCBwmd6E+qkuCoRW2v1teWbWetij2pUqu9e1hdNkWF75Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"827467b518695570c34684fe967e0bba987b82ad1c52743ba95510281b058b24","last_reissued_at":"2026-05-18T03:08:16.123167Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:08:16.123167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0909.0885","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":"2026-05-18T03:08:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4FXCmXfBXUFT838B154T2n4b9fNhEKCS7QYJFWoNwXZ/3tm2nCBKm/GxbMKq3Hw1lSC2/IFEQDEEJ3tfnhOGAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T06:59:52.139644Z"},"content_sha256":"dd03861798c33db834115b1f0b826de5ba1458eee3a904a737e035a304374d06","schema_version":"1.0","event_id":"sha256:dd03861798c33db834115b1f0b826de5ba1458eee3a904a737e035a304374d06"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:QJ2GPNIYNFKXBQ2GQT7JM7QLXK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-resolution modal analysis","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.data-an","authors_text":"Bertrand David (LTCI), Kerem Ege (LMS), Xavier Boutillon (LMS)","submitted_at":"2009-09-04T14:25:29Z","abstract_excerpt":"Usual modal analysis techniques are based on the Fourier transform. Due to the Delta T . Delta f limitation, they perform poorly when the modal overlap mu exceeds 30%. A technique based on a high-resolution analysis algorithm and an order-detection method is presented here, with the aim of filling the gap between the low- and the high-frequency domains (30%<mu<100%). A pseudo-impulse force is applied at points of interests of a structure and the response is measured at a given point. For each pair of measurements, the impulse response of the structure is retrieved by deconvolving the pseudo-im"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.0885","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":"2026-05-18T03:08:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MXSqETLRCeQJEyV4cJOPHIESuPjPHqDsbDEPeJlGSiqVi6gfZDpiGQL+zDdU2QUmwDTwAs+imEW4bgdo+EO8DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T06:59:52.139982Z"},"content_sha256":"47197011a26e7d5f27561dab66101fedc5d514f898f29cd52d6dafe0839101b7","schema_version":"1.0","event_id":"sha256:47197011a26e7d5f27561dab66101fedc5d514f898f29cd52d6dafe0839101b7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QJ2GPNIYNFKXBQ2GQT7JM7QLXK/bundle.json","state_url":"https://pith.science/pith/QJ2GPNIYNFKXBQ2GQT7JM7QLXK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QJ2GPNIYNFKXBQ2GQT7JM7QLXK/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":"2026-07-05T06:59:52Z","links":{"resolver":"https://pith.science/pith/QJ2GPNIYNFKXBQ2GQT7JM7QLXK","bundle":"https://pith.science/pith/QJ2GPNIYNFKXBQ2GQT7JM7QLXK/bundle.json","state":"https://pith.science/pith/QJ2GPNIYNFKXBQ2GQT7JM7QLXK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QJ2GPNIYNFKXBQ2GQT7JM7QLXK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:QJ2GPNIYNFKXBQ2GQT7JM7QLXK","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":"cfd0aa3152ba97e49df6717ad4d49a6e9ee18dcce38a48b2f8cfb724ea0b0202","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2009-09-04T14:25:29Z","title_canon_sha256":"9fd227581b7fc31011ee0009f9f12a9c79da6622a45a9eb89610c7bc8bf67d25"},"schema_version":"1.0","source":{"id":"0909.0885","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0909.0885","created_at":"2026-05-18T03:08:16Z"},{"alias_kind":"arxiv_version","alias_value":"0909.0885v1","created_at":"2026-05-18T03:08:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.0885","created_at":"2026-05-18T03:08:16Z"},{"alias_kind":"pith_short_12","alias_value":"QJ2GPNIYNFKX","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"QJ2GPNIYNFKXBQ2G","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"QJ2GPNIY","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:47197011a26e7d5f27561dab66101fedc5d514f898f29cd52d6dafe0839101b7","target":"graph","created_at":"2026-05-18T03:08:16Z","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":"Usual modal analysis techniques are based on the Fourier transform. Due to the Delta T . Delta f limitation, they perform poorly when the modal overlap mu exceeds 30%. A technique based on a high-resolution analysis algorithm and an order-detection method is presented here, with the aim of filling the gap between the low- and the high-frequency domains (30%<mu<100%). A pseudo-impulse force is applied at points of interests of a structure and the response is measured at a given point. For each pair of measurements, the impulse response of the structure is retrieved by deconvolving the pseudo-im","authors_text":"Bertrand David (LTCI), Kerem Ege (LMS), Xavier Boutillon (LMS)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2009-09-04T14:25:29Z","title":"High-resolution modal analysis"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.0885","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:dd03861798c33db834115b1f0b826de5ba1458eee3a904a737e035a304374d06","target":"record","created_at":"2026-05-18T03:08:16Z","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":"cfd0aa3152ba97e49df6717ad4d49a6e9ee18dcce38a48b2f8cfb724ea0b0202","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2009-09-04T14:25:29Z","title_canon_sha256":"9fd227581b7fc31011ee0009f9f12a9c79da6622a45a9eb89610c7bc8bf67d25"},"schema_version":"1.0","source":{"id":"0909.0885","kind":"arxiv","version":1}},"canonical_sha256":"827467b518695570c34684fe967e0bba987b82ad1c52743ba95510281b058b24","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"827467b518695570c34684fe967e0bba987b82ad1c52743ba95510281b058b24","first_computed_at":"2026-05-18T03:08:16.123167Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:08:16.123167Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6vee/+3Er2cZm/be6QKp9Hx2rf9eCFTsPqHgcC0biCBwmd6E+qkuCoRW2v1teWbWetij2pUqu9e1hdNkWF75Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:08:16.123666Z","signed_message":"canonical_sha256_bytes"},"source_id":"0909.0885","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd03861798c33db834115b1f0b826de5ba1458eee3a904a737e035a304374d06","sha256:47197011a26e7d5f27561dab66101fedc5d514f898f29cd52d6dafe0839101b7"],"state_sha256":"f1829fdfe76205e6e715e290ed984b457d8ff51a8e2ae66b2208299369deff28"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9cf2ixEEob1S33bFFBLTwOrRMuzvg0p0vG/YTqX9U9P/h6eGMJ2+hsw/9SgP3il9HriZ4eZAZIVGwf/sMV8LDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T06:59:52.141873Z","bundle_sha256":"81441185cb0ae6532685ec447ab405f2ba0d1ab79fa89c903e2c445cc536cd45"}}