{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4RV4MV5CIV4EEGP6RYXTQQZREW","short_pith_number":"pith:4RV4MV5C","canonical_record":{"source":{"id":"2102.00837","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-02-01T13:50:56Z","cross_cats_sorted":[],"title_canon_sha256":"b7e9c4bce198717d1f8bdc5a0e41d2689371a2e9f89754489dd120087003f76c","abstract_canon_sha256":"561b5a249d2f60a3a5246d9e04b6278a2ae76b17139cafd8df815e3ab105667f"},"schema_version":"1.0"},"canonical_sha256":"e46bc657a245784219fe8e2f38433125a85a09eecc48b0b51d194147a215405c","source":{"kind":"arxiv","id":"2102.00837","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.00837","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"arxiv_version","alias_value":"2102.00837v1","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.00837","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"pith_short_12","alias_value":"4RV4MV5CIV4E","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"pith_short_16","alias_value":"4RV4MV5CIV4EEGP6","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"pith_short_8","alias_value":"4RV4MV5C","created_at":"2026-07-05T02:11:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4RV4MV5CIV4EEGP6RYXTQQZREW","target":"record","payload":{"canonical_record":{"source":{"id":"2102.00837","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-02-01T13:50:56Z","cross_cats_sorted":[],"title_canon_sha256":"b7e9c4bce198717d1f8bdc5a0e41d2689371a2e9f89754489dd120087003f76c","abstract_canon_sha256":"561b5a249d2f60a3a5246d9e04b6278a2ae76b17139cafd8df815e3ab105667f"},"schema_version":"1.0"},"canonical_sha256":"e46bc657a245784219fe8e2f38433125a85a09eecc48b0b51d194147a215405c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:11:15.648337Z","signature_b64":"NvinYGtNfT7avMC8lXGtuFRyELaUvOTwASp8++SBuZoJ/6O2kCvxV1ccz2HRbMnV6vEG08lseqz7H5+IhUr3BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e46bc657a245784219fe8e2f38433125a85a09eecc48b0b51d194147a215405c","last_reissued_at":"2026-07-05T02:11:15.647804Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:11:15.647804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2102.00837","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":"2026-07-05T02:11:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"goOvKMmEPiRexdyCvh3oT4vzuYliMKMjnuS95Vq65wlCgyKsdjiLt1Ql1zAGCrV2xqf1d1uITPYcW+lr9tqCCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T20:40:23.443391Z"},"content_sha256":"cdbf7e63798c32003193b97fbc94ba21186380456a38977ab1a7122493086bb5","schema_version":"1.0","event_id":"sha256:cdbf7e63798c32003193b97fbc94ba21186380456a38977ab1a7122493086bb5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4RV4MV5CIV4EEGP6RYXTQQZREW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Machine learning pipeline for battery state of health estimation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.LG","authors_text":"Darius Roman, David Flynn, Michael Pecht, Saurabh Saxena, Valentin Robu","submitted_at":"2021-02-01T13:50:56Z","abstract_excerpt":"Lithium-ion batteries are ubiquitous in modern day applications ranging from portable electronics to electric vehicles. Irrespective of the application, reliable real-time estimation of battery state of health (SOH) by on-board computers is crucial to the safe operation of the battery, ultimately safeguarding asset integrity. In this paper, we design and evaluate a machine learning pipeline for estimation of battery capacity fade - a metric of battery health - on 179 cells cycled under various conditions. The pipeline estimates battery SOH with an associated confidence interval by using two pa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.00837","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/2102.00837/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":"2026-07-05T02:11:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fwxaatg/3DEBS6rjiwnM2CdAPc8H6bLABrVKctb9v9CnV2fk8aV6k6uFF2GySUquKR50tl4acZk9r9SBSBwhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T20:40:23.443943Z"},"content_sha256":"671f218e437df8dfc897260981667176779fee0474f98394777c09d7eb2c3abb","schema_version":"1.0","event_id":"sha256:671f218e437df8dfc897260981667176779fee0474f98394777c09d7eb2c3abb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4RV4MV5CIV4EEGP6RYXTQQZREW/bundle.json","state_url":"https://pith.science/pith/4RV4MV5CIV4EEGP6RYXTQQZREW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4RV4MV5CIV4EEGP6RYXTQQZREW/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":"2026-08-04T20:40:23Z","links":{"resolver":"https://pith.science/pith/4RV4MV5CIV4EEGP6RYXTQQZREW","bundle":"https://pith.science/pith/4RV4MV5CIV4EEGP6RYXTQQZREW/bundle.json","state":"https://pith.science/pith/4RV4MV5CIV4EEGP6RYXTQQZREW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4RV4MV5CIV4EEGP6RYXTQQZREW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4RV4MV5CIV4EEGP6RYXTQQZREW","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":"561b5a249d2f60a3a5246d9e04b6278a2ae76b17139cafd8df815e3ab105667f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-02-01T13:50:56Z","title_canon_sha256":"b7e9c4bce198717d1f8bdc5a0e41d2689371a2e9f89754489dd120087003f76c"},"schema_version":"1.0","source":{"id":"2102.00837","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2102.00837","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"arxiv_version","alias_value":"2102.00837v1","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.00837","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"pith_short_12","alias_value":"4RV4MV5CIV4E","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"pith_short_16","alias_value":"4RV4MV5CIV4EEGP6","created_at":"2026-07-05T02:11:15Z"},{"alias_kind":"pith_short_8","alias_value":"4RV4MV5C","created_at":"2026-07-05T02:11:15Z"}],"graph_snapshots":[{"event_id":"sha256:671f218e437df8dfc897260981667176779fee0474f98394777c09d7eb2c3abb","target":"graph","created_at":"2026-07-05T02:11:15Z","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/2102.00837/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Lithium-ion batteries are ubiquitous in modern day applications ranging from portable electronics to electric vehicles. Irrespective of the application, reliable real-time estimation of battery state of health (SOH) by on-board computers is crucial to the safe operation of the battery, ultimately safeguarding asset integrity. In this paper, we design and evaluate a machine learning pipeline for estimation of battery capacity fade - a metric of battery health - on 179 cells cycled under various conditions. The pipeline estimates battery SOH with an associated confidence interval by using two pa","authors_text":"Darius Roman, David Flynn, Michael Pecht, Saurabh Saxena, Valentin Robu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-02-01T13:50:56Z","title":"Machine learning pipeline for battery state of health estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.00837","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:cdbf7e63798c32003193b97fbc94ba21186380456a38977ab1a7122493086bb5","target":"record","created_at":"2026-07-05T02:11:15Z","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":"561b5a249d2f60a3a5246d9e04b6278a2ae76b17139cafd8df815e3ab105667f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-02-01T13:50:56Z","title_canon_sha256":"b7e9c4bce198717d1f8bdc5a0e41d2689371a2e9f89754489dd120087003f76c"},"schema_version":"1.0","source":{"id":"2102.00837","kind":"arxiv","version":1}},"canonical_sha256":"e46bc657a245784219fe8e2f38433125a85a09eecc48b0b51d194147a215405c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e46bc657a245784219fe8e2f38433125a85a09eecc48b0b51d194147a215405c","first_computed_at":"2026-07-05T02:11:15.647804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:11:15.647804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NvinYGtNfT7avMC8lXGtuFRyELaUvOTwASp8++SBuZoJ/6O2kCvxV1ccz2HRbMnV6vEG08lseqz7H5+IhUr3BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:11:15.648337Z","signed_message":"canonical_sha256_bytes"},"source_id":"2102.00837","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cdbf7e63798c32003193b97fbc94ba21186380456a38977ab1a7122493086bb5","sha256:671f218e437df8dfc897260981667176779fee0474f98394777c09d7eb2c3abb"],"state_sha256":"2c1c72aba512b1b75b07f23aff0ee22d67fbca1abf600927edc4330262e93c93"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F4NnmWbjtRcvmk3QHiHSvqf2/wiigBbvNcKrt1uSfB8zY4LhfMFP51S79jUP+DE0M75JNa3EsqaiVS3vooZJDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T20:40:23.450326Z","bundle_sha256":"314497c0744fe33c4c64e1872c078db1f4d73850dac69e152681f2e091a24ac9"}}