{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EF4ZQIBM24IOEPHBOJVMIJPL6X","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":"27f1a95fd1a2d4965cb60f9a325eb06431b9eb7e9d11344e82abb04501996b08","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-10-23T07:55:33Z","title_canon_sha256":"386cb8ddaf9c5bfdf72b48b6962425c57cec8797a58393acf1cabf4f78d8614a"},"schema_version":"1.0","source":{"id":"1410.6274","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.6274","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"arxiv_version","alias_value":"1410.6274v1","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.6274","created_at":"2026-05-18T01:41:40Z"},{"alias_kind":"pith_short_12","alias_value":"EF4ZQIBM24IO","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"EF4ZQIBM24IOEPHB","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"EF4ZQIBM","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:2f15b8fbf332e477d28d098a93f0be73084f68bdbab1d758cf1333200ba11fd2","target":"graph","created_at":"2026-05-18T01:41:40Z","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 use the methodology of singular spectrum analysis (SSA), principal component analysis (PCA), and multi-fractal detrended fluctuation analysis (MFDFA), for investigating characteristics of vibration time series data from a friction brake. SSA and PCA are used to study the long time-scale characteristics of the time series. MFDFA is applied for investigating all time scales up to the smallest recorded one. It turns out that the majority of the long time-scale dynamics, that is presumably dominated by the structural dynamics of the brake system, is dominated by very few active dimensions only ","authors_text":"Boris Wernitz, Nikolay K. Vitanov, Norbert P. Hoffmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-10-23T07:55:33Z","title":"Nonlinear analysis of time series of vibration data from a friction brake: SSA, PCA, and MFDFA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.6274","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:d94c39a6b694bc5ef1744fd832005c6035d9d3cb2fa9291843260d3682b03c26","target":"record","created_at":"2026-05-18T01:41:40Z","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":"27f1a95fd1a2d4965cb60f9a325eb06431b9eb7e9d11344e82abb04501996b08","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-10-23T07:55:33Z","title_canon_sha256":"386cb8ddaf9c5bfdf72b48b6962425c57cec8797a58393acf1cabf4f78d8614a"},"schema_version":"1.0","source":{"id":"1410.6274","kind":"arxiv","version":1}},"canonical_sha256":"217998202cd710e23ce1726ac425ebf5ececb09284288b7db87bfa62e8b62041","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"217998202cd710e23ce1726ac425ebf5ececb09284288b7db87bfa62e8b62041","first_computed_at":"2026-05-18T01:41:40.683052Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:40.683052Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+G8oLWFriZX5EWvCVHnMYJkOLN6u963e/lEgDiU7FwgRjN4IldznfkJUlP3+Xu+3GyKDo+pS+Xyyhj7/0TZ9CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:40.683748Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.6274","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d94c39a6b694bc5ef1744fd832005c6035d9d3cb2fa9291843260d3682b03c26","sha256:2f15b8fbf332e477d28d098a93f0be73084f68bdbab1d758cf1333200ba11fd2"],"state_sha256":"d0df27caab99fb9e335cda3e7fb1ee7d476e505bd813665ea401a362256e64d7"}