{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:62ZLTPZA4VVQ72CJGPBIEIAJQ6","short_pith_number":"pith:62ZLTPZA","canonical_record":{"source":{"id":"2012.09449","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2020-12-17T08:52:10Z","cross_cats_sorted":["cs.SY","stat.AP"],"title_canon_sha256":"76f6f59752d4c4da21002277177a30b421615371c537bfec1a8d1b6d5c7937c0","abstract_canon_sha256":"054b3dd643109bd5b95a6d5edd7c67d2111ccc52a1e9529f571410ed5ff4a463"},"schema_version":"1.0"},"canonical_sha256":"f6b2b9bf20e56b0fe84933c282200987af93366d1c948ea30eed57b5c250b6a1","source":{"kind":"arxiv","id":"2012.09449","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.09449","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"arxiv_version","alias_value":"2012.09449v1","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.09449","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"pith_short_12","alias_value":"62ZLTPZA4VVQ","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"pith_short_16","alias_value":"62ZLTPZA4VVQ72CJ","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"pith_short_8","alias_value":"62ZLTPZA","created_at":"2026-07-05T02:00:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:62ZLTPZA4VVQ72CJGPBIEIAJQ6","target":"record","payload":{"canonical_record":{"source":{"id":"2012.09449","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2020-12-17T08:52:10Z","cross_cats_sorted":["cs.SY","stat.AP"],"title_canon_sha256":"76f6f59752d4c4da21002277177a30b421615371c537bfec1a8d1b6d5c7937c0","abstract_canon_sha256":"054b3dd643109bd5b95a6d5edd7c67d2111ccc52a1e9529f571410ed5ff4a463"},"schema_version":"1.0"},"canonical_sha256":"f6b2b9bf20e56b0fe84933c282200987af93366d1c948ea30eed57b5c250b6a1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:00:17.496763Z","signature_b64":"Om2mG04ZHVhRDHoIRCb7//EZJ7hE52bnf6f9SawV7vsYioC7FoflRCnlbY/xW934EukFjdfrftS5AgHT6gXqBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6b2b9bf20e56b0fe84933c282200987af93366d1c948ea30eed57b5c250b6a1","last_reissued_at":"2026-07-05T02:00:17.496434Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:00:17.496434Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.09449","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":"2026-07-05T02:00:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lmd+SzoLuqaaaEj3PF8E/UyMXyVq+x8y8cevXHl8+IyHiyHwmUDaDUlvu4UDXFTM+MP/zLzmb8KBxZqW3zzEDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T07:31:13.818729Z"},"content_sha256":"36c2e2d79db977adeb6b8c417069502e3d78d66685d01cbce9771b93d2c4e296","schema_version":"1.0","event_id":"sha256:36c2e2d79db977adeb6b8c417069502e3d78d66685d01cbce9771b93d2c4e296"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:62ZLTPZA4VVQ72CJGPBIEIAJQ6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Uncertainty Quantification in Case of Imperfect Models: A Review","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["cs.SY","stat.AP"],"primary_cat":"eess.SY","authors_text":"Michael Kohler, Sebastian Kersting","submitted_at":"2020-12-17T08:52:10Z","abstract_excerpt":"Uncertainty quantification of complex technical systems is often based on a computer model of the system. As all models such a computer model is always wrong in the sense that it does not describe the reality perfectly. The purpose of this article is to give a review of techniques which use observed values of the technical systems in order to take into account the inadequacy of a computer model in uncertainty quantification. The techniques reviewed in this article are illustrated and compared by applying them to applications in mechanical engineering."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.09449","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/2012.09449/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":"2026-07-05T02:00:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ImzxYx0YcECpGtzIl+Nj1Opspigrq2xo2nx1XdwawwBIUjIV7ISwkl5bP0QVspQmGlwUJK8kEUmIFjQxLAmyAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T07:31:13.819250Z"},"content_sha256":"0e92c82567eaf2b1955513b254080255c34a947f1136f38cb13558f008ba6865","schema_version":"1.0","event_id":"sha256:0e92c82567eaf2b1955513b254080255c34a947f1136f38cb13558f008ba6865"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/62ZLTPZA4VVQ72CJGPBIEIAJQ6/bundle.json","state_url":"https://pith.science/pith/62ZLTPZA4VVQ72CJGPBIEIAJQ6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/62ZLTPZA4VVQ72CJGPBIEIAJQ6/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":"2026-08-14T07:31:13Z","links":{"resolver":"https://pith.science/pith/62ZLTPZA4VVQ72CJGPBIEIAJQ6","bundle":"https://pith.science/pith/62ZLTPZA4VVQ72CJGPBIEIAJQ6/bundle.json","state":"https://pith.science/pith/62ZLTPZA4VVQ72CJGPBIEIAJQ6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/62ZLTPZA4VVQ72CJGPBIEIAJQ6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:62ZLTPZA4VVQ72CJGPBIEIAJQ6","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":"054b3dd643109bd5b95a6d5edd7c67d2111ccc52a1e9529f571410ed5ff4a463","cross_cats_sorted":["cs.SY","stat.AP"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2020-12-17T08:52:10Z","title_canon_sha256":"76f6f59752d4c4da21002277177a30b421615371c537bfec1a8d1b6d5c7937c0"},"schema_version":"1.0","source":{"id":"2012.09449","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.09449","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"arxiv_version","alias_value":"2012.09449v1","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.09449","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"pith_short_12","alias_value":"62ZLTPZA4VVQ","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"pith_short_16","alias_value":"62ZLTPZA4VVQ72CJ","created_at":"2026-07-05T02:00:17Z"},{"alias_kind":"pith_short_8","alias_value":"62ZLTPZA","created_at":"2026-07-05T02:00:17Z"}],"graph_snapshots":[{"event_id":"sha256:0e92c82567eaf2b1955513b254080255c34a947f1136f38cb13558f008ba6865","target":"graph","created_at":"2026-07-05T02:00:17Z","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/2012.09449/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Uncertainty quantification of complex technical systems is often based on a computer model of the system. As all models such a computer model is always wrong in the sense that it does not describe the reality perfectly. The purpose of this article is to give a review of techniques which use observed values of the technical systems in order to take into account the inadequacy of a computer model in uncertainty quantification. The techniques reviewed in this article are illustrated and compared by applying them to applications in mechanical engineering.","authors_text":"Michael Kohler, Sebastian Kersting","cross_cats":["cs.SY","stat.AP"],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2020-12-17T08:52:10Z","title":"Uncertainty Quantification in Case of Imperfect Models: A Review"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.09449","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":"sha256:36c2e2d79db977adeb6b8c417069502e3d78d66685d01cbce9771b93d2c4e296","target":"record","created_at":"2026-07-05T02:00:17Z","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":"054b3dd643109bd5b95a6d5edd7c67d2111ccc52a1e9529f571410ed5ff4a463","cross_cats_sorted":["cs.SY","stat.AP"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2020-12-17T08:52:10Z","title_canon_sha256":"76f6f59752d4c4da21002277177a30b421615371c537bfec1a8d1b6d5c7937c0"},"schema_version":"1.0","source":{"id":"2012.09449","kind":"arxiv","version":1}},"canonical_sha256":"f6b2b9bf20e56b0fe84933c282200987af93366d1c948ea30eed57b5c250b6a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6b2b9bf20e56b0fe84933c282200987af93366d1c948ea30eed57b5c250b6a1","first_computed_at":"2026-07-05T02:00:17.496434Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:00:17.496434Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Om2mG04ZHVhRDHoIRCb7//EZJ7hE52bnf6f9SawV7vsYioC7FoflRCnlbY/xW934EukFjdfrftS5AgHT6gXqBg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:00:17.496763Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.09449","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36c2e2d79db977adeb6b8c417069502e3d78d66685d01cbce9771b93d2c4e296","sha256:0e92c82567eaf2b1955513b254080255c34a947f1136f38cb13558f008ba6865"],"state_sha256":"1fb58d9d359c4ed319318514a18f42e6728029d65ccbe6e391c7fb8bf46c0922"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"72gHbFas58W2Z4zaBU+9pwF+hg2JMgnKiIuOys1Diy1ptYH7x1RCOySvLcpy1RZIEghYNYTA9QgNeyRxNhlkBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T07:31:13.824387Z","bundle_sha256":"2438c666364be3bdeae922853b5bea3f9b53ed672a06eb5ecae07ad17f05991a"}}