{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:CI6EGYB4WKMH42FXO4PVIDBQKZ","short_pith_number":"pith:CI6EGYB4","canonical_record":{"source":{"id":"2101.02567","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-01-07T14:45:49Z","cross_cats_sorted":["cs.SY","stat.AP"],"title_canon_sha256":"d418c6720191f6b04f586089bc0fcff4b8cd9e0cabba4f5b39489be4c39d96cd","abstract_canon_sha256":"cb33b1ed6f675d337bd9760a39696bf79ce0d93364f5be8583cf048ee611b7ff"},"schema_version":"1.0"},"canonical_sha256":"123c43603cb2987e68b7771f540c305665f7b44fa7c2c48ef21ff505091155ea","source":{"kind":"arxiv","id":"2101.02567","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.02567","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"arxiv_version","alias_value":"2101.02567v1","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.02567","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"pith_short_12","alias_value":"CI6EGYB4WKMH","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"pith_short_16","alias_value":"CI6EGYB4WKMH42FX","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"pith_short_8","alias_value":"CI6EGYB4","created_at":"2026-07-05T02:05:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:CI6EGYB4WKMH42FXO4PVIDBQKZ","target":"record","payload":{"canonical_record":{"source":{"id":"2101.02567","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-01-07T14:45:49Z","cross_cats_sorted":["cs.SY","stat.AP"],"title_canon_sha256":"d418c6720191f6b04f586089bc0fcff4b8cd9e0cabba4f5b39489be4c39d96cd","abstract_canon_sha256":"cb33b1ed6f675d337bd9760a39696bf79ce0d93364f5be8583cf048ee611b7ff"},"schema_version":"1.0"},"canonical_sha256":"123c43603cb2987e68b7771f540c305665f7b44fa7c2c48ef21ff505091155ea","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:05:15.106639Z","signature_b64":"UAgv3piCzHSlFNCnU/pmgurHxZG6dfqquwZB+40STIiRO5numEPg0as8jD/pivg3aqCTXhOgdwETGLBlIeNVDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"123c43603cb2987e68b7771f540c305665f7b44fa7c2c48ef21ff505091155ea","last_reissued_at":"2026-07-05T02:05:15.106226Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:05:15.106226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.02567","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":"2026-07-05T02:05:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w4RZ6jmpaaxTu74IGzvd3oIDEweZF5WsNulGu4nOWLElj0/2+GFbsuJpYA4J5yA0R5Oh7QUqUw9t8sGgyldxCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:44:24.966464Z"},"content_sha256":"ed72eb6318f3b3cf89827550296d5e3ba3d88c3643f66a1d48a97325a0a1e66d","schema_version":"1.0","event_id":"sha256:ed72eb6318f3b3cf89827550296d5e3ba3d88c3643f66a1d48a97325a0a1e66d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:CI6EGYB4WKMH42FXO4PVIDBQKZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Monitoring of Railpad Long-term Condition in Turnouts Using Extreme Value Distributions","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["cs.SY","stat.AP"],"primary_cat":"eess.SY","authors_text":"Mogens Blanke, Pegah Barkhordari, Roberto Galeazzi","submitted_at":"2021-01-07T14:45:49Z","abstract_excerpt":"The railpad is a key element in railway infrastructures that plays an essential role in the train-track dynamics. Presence of worn or defective railpads along railway track may lead to large wheel/rail interaction forces, and a high rate of deterioration for track components. Despite the importance of railpad, the track infrastructure managers use no inspection tool for monitoring in-service railpads over time. In this paper, a novel data-driven monitoring tool for long-term performance analysis of in-service railpads is developed based on train-induced vibration data collected by a track-side"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.02567","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2101.02567/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":"2026-07-05T02:05:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RE9CZPsSYWBVk2REOVau2BMI/w7JNJmD7YdpsinfvpxeC/OeB0ph7ZXPYR2oIbMTdGIrO9W/91yA2xKF0Mx9Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:44:24.966977Z"},"content_sha256":"a99e1a893cb53ae81cf1145e9e39644b869a9ae39cee17fe13c558f4dd247809","schema_version":"1.0","event_id":"sha256:a99e1a893cb53ae81cf1145e9e39644b869a9ae39cee17fe13c558f4dd247809"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CI6EGYB4WKMH42FXO4PVIDBQKZ/bundle.json","state_url":"https://pith.science/pith/CI6EGYB4WKMH42FXO4PVIDBQKZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CI6EGYB4WKMH42FXO4PVIDBQKZ/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":"2026-08-06T11:44:24Z","links":{"resolver":"https://pith.science/pith/CI6EGYB4WKMH42FXO4PVIDBQKZ","bundle":"https://pith.science/pith/CI6EGYB4WKMH42FXO4PVIDBQKZ/bundle.json","state":"https://pith.science/pith/CI6EGYB4WKMH42FXO4PVIDBQKZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CI6EGYB4WKMH42FXO4PVIDBQKZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:CI6EGYB4WKMH42FXO4PVIDBQKZ","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":"cb33b1ed6f675d337bd9760a39696bf79ce0d93364f5be8583cf048ee611b7ff","cross_cats_sorted":["cs.SY","stat.AP"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-01-07T14:45:49Z","title_canon_sha256":"d418c6720191f6b04f586089bc0fcff4b8cd9e0cabba4f5b39489be4c39d96cd"},"schema_version":"1.0","source":{"id":"2101.02567","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.02567","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"arxiv_version","alias_value":"2101.02567v1","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.02567","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"pith_short_12","alias_value":"CI6EGYB4WKMH","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"pith_short_16","alias_value":"CI6EGYB4WKMH42FX","created_at":"2026-07-05T02:05:15Z"},{"alias_kind":"pith_short_8","alias_value":"CI6EGYB4","created_at":"2026-07-05T02:05:15Z"}],"graph_snapshots":[{"event_id":"sha256:a99e1a893cb53ae81cf1145e9e39644b869a9ae39cee17fe13c558f4dd247809","target":"graph","created_at":"2026-07-05T02:05:15Z","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/2101.02567/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The railpad is a key element in railway infrastructures that plays an essential role in the train-track dynamics. Presence of worn or defective railpads along railway track may lead to large wheel/rail interaction forces, and a high rate of deterioration for track components. Despite the importance of railpad, the track infrastructure managers use no inspection tool for monitoring in-service railpads over time. In this paper, a novel data-driven monitoring tool for long-term performance analysis of in-service railpads is developed based on train-induced vibration data collected by a track-side","authors_text":"Mogens Blanke, Pegah Barkhordari, Roberto Galeazzi","cross_cats":["cs.SY","stat.AP"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-01-07T14:45:49Z","title":"Monitoring of Railpad Long-term Condition in Turnouts Using Extreme Value Distributions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.02567","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:ed72eb6318f3b3cf89827550296d5e3ba3d88c3643f66a1d48a97325a0a1e66d","target":"record","created_at":"2026-07-05T02:05:15Z","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":"cb33b1ed6f675d337bd9760a39696bf79ce0d93364f5be8583cf048ee611b7ff","cross_cats_sorted":["cs.SY","stat.AP"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2021-01-07T14:45:49Z","title_canon_sha256":"d418c6720191f6b04f586089bc0fcff4b8cd9e0cabba4f5b39489be4c39d96cd"},"schema_version":"1.0","source":{"id":"2101.02567","kind":"arxiv","version":1}},"canonical_sha256":"123c43603cb2987e68b7771f540c305665f7b44fa7c2c48ef21ff505091155ea","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"123c43603cb2987e68b7771f540c305665f7b44fa7c2c48ef21ff505091155ea","first_computed_at":"2026-07-05T02:05:15.106226Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:05:15.106226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UAgv3piCzHSlFNCnU/pmgurHxZG6dfqquwZB+40STIiRO5numEPg0as8jD/pivg3aqCTXhOgdwETGLBlIeNVDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:05:15.106639Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.02567","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed72eb6318f3b3cf89827550296d5e3ba3d88c3643f66a1d48a97325a0a1e66d","sha256:a99e1a893cb53ae81cf1145e9e39644b869a9ae39cee17fe13c558f4dd247809"],"state_sha256":"ff8214972b77888fc8756c7d998f05c6ba85544dc8418271e940d042f2ced7e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9cY5XFjoPCxz8ir+SJy4Xco6vlp0FM5J/Q5MBWAW2wQqSfRdslAFnpCvoVN3d6w7WYIYIxh0U74pVI0K3of/Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T11:44:24.970999Z","bundle_sha256":"7de193711d6128efae71879d2b4b8dd2e80c71667b29c6b00a3cfadde95a73eb"}}