{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:SM62SRZKPAA5AMQY3ROK5XQOWN","short_pith_number":"pith:SM62SRZK","canonical_record":{"source":{"id":"1811.09130","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-11-22T12:14:37Z","cross_cats_sorted":[],"title_canon_sha256":"6873196bce1170f5efe379ced8fc4ae1337d02ed734138377dc07dd44ec3ff36","abstract_canon_sha256":"2e2483ce66a00d22825e7c769e1802a95590214b84074e7e9425c97d36077713"},"schema_version":"1.0"},"canonical_sha256":"933da9472a7801d03218dc5caede0eb373183c82e8944cecb13b207a78b89fcc","source":{"kind":"arxiv","id":"1811.09130","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.09130","created_at":"2026-05-18T00:00:06Z"},{"alias_kind":"arxiv_version","alias_value":"1811.09130v1","created_at":"2026-05-18T00:00:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.09130","created_at":"2026-05-18T00:00:06Z"},{"alias_kind":"pith_short_12","alias_value":"SM62SRZKPAA5","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SM62SRZKPAA5AMQY","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SM62SRZK","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:SM62SRZKPAA5AMQY3ROK5XQOWN","target":"record","payload":{"canonical_record":{"source":{"id":"1811.09130","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-11-22T12:14:37Z","cross_cats_sorted":[],"title_canon_sha256":"6873196bce1170f5efe379ced8fc4ae1337d02ed734138377dc07dd44ec3ff36","abstract_canon_sha256":"2e2483ce66a00d22825e7c769e1802a95590214b84074e7e9425c97d36077713"},"schema_version":"1.0"},"canonical_sha256":"933da9472a7801d03218dc5caede0eb373183c82e8944cecb13b207a78b89fcc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:00:06.980830Z","signature_b64":"5/YAmffBXunXO3fRTPcrxCCiGwgBCRqpLUTVAh4xs17vmkOv84lGQScvmQgjGv4B34jZ37YMfhPkB1ud9vW3Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"933da9472a7801d03218dc5caede0eb373183c82e8944cecb13b207a78b89fcc","last_reissued_at":"2026-05-18T00:00:06.980292Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:00:06.980292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.09130","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":"2026-05-18T00:00:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N0vqrg3CVYk70cav4aj7GYwjEU6SJmFrVYxgaP4CY1XsmJZskO4130ZOfCMX1m4vLZgFUQoZ9HY/kUJAQWkwCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:39:15.713489Z"},"content_sha256":"c85e40abb24fd7733cb759645d25d32b90ebe75c29afaa9bc631f20fd970b0d3","schema_version":"1.0","event_id":"sha256:c85e40abb24fd7733cb759645d25d32b90ebe75c29afaa9bc631f20fd970b0d3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:SM62SRZKPAA5AMQY3ROK5XQOWN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Advanced statistical methods to fit nuclear models","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"A.Gration, A. Pastore, M. Shelley, P.Becker","submitted_at":"2018-11-22T12:14:37Z","abstract_excerpt":"We discuss advanced statistical methods to improve parameter estimation of nuclear models. In particular, using the Liquid Drop Model for nuclear binding energies, we show that the area around the global $\\chi^2$ minimum can be efficiently identified using Gaussian Process Emulation. We also demonstrate how Markov-chain Monte-Carlo sampling is a valuable tool for visualising and analysing the associated multidimensional likelihood surface."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.09130","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":"2026-05-18T00:00:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qAqgT7mOma8KA4fpXNKD78pdkpwD+2ZG0CrBBdmD+1Gv8rY/ZEOTDhV1Jc283rTw5/plaR0OGmJPSRlexz5tCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:39:15.714015Z"},"content_sha256":"dc03d681bc87c38d9b4cab393d69fa31de0ce96e1bc5f5bd7f554743efcc30b4","schema_version":"1.0","event_id":"sha256:dc03d681bc87c38d9b4cab393d69fa31de0ce96e1bc5f5bd7f554743efcc30b4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SM62SRZKPAA5AMQY3ROK5XQOWN/bundle.json","state_url":"https://pith.science/pith/SM62SRZKPAA5AMQY3ROK5XQOWN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SM62SRZKPAA5AMQY3ROK5XQOWN/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":"2026-05-25T23:39:15Z","links":{"resolver":"https://pith.science/pith/SM62SRZKPAA5AMQY3ROK5XQOWN","bundle":"https://pith.science/pith/SM62SRZKPAA5AMQY3ROK5XQOWN/bundle.json","state":"https://pith.science/pith/SM62SRZKPAA5AMQY3ROK5XQOWN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SM62SRZKPAA5AMQY3ROK5XQOWN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:SM62SRZKPAA5AMQY3ROK5XQOWN","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":"2e2483ce66a00d22825e7c769e1802a95590214b84074e7e9425c97d36077713","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-11-22T12:14:37Z","title_canon_sha256":"6873196bce1170f5efe379ced8fc4ae1337d02ed734138377dc07dd44ec3ff36"},"schema_version":"1.0","source":{"id":"1811.09130","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.09130","created_at":"2026-05-18T00:00:06Z"},{"alias_kind":"arxiv_version","alias_value":"1811.09130v1","created_at":"2026-05-18T00:00:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.09130","created_at":"2026-05-18T00:00:06Z"},{"alias_kind":"pith_short_12","alias_value":"SM62SRZKPAA5","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SM62SRZKPAA5AMQY","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SM62SRZK","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:dc03d681bc87c38d9b4cab393d69fa31de0ce96e1bc5f5bd7f554743efcc30b4","target":"graph","created_at":"2026-05-18T00:00:06Z","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 discuss advanced statistical methods to improve parameter estimation of nuclear models. In particular, using the Liquid Drop Model for nuclear binding energies, we show that the area around the global $\\chi^2$ minimum can be efficiently identified using Gaussian Process Emulation. We also demonstrate how Markov-chain Monte-Carlo sampling is a valuable tool for visualising and analysing the associated multidimensional likelihood surface.","authors_text":"A.Gration, A. Pastore, M. Shelley, P.Becker","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-11-22T12:14:37Z","title":"Advanced statistical methods to fit nuclear models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.09130","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:c85e40abb24fd7733cb759645d25d32b90ebe75c29afaa9bc631f20fd970b0d3","target":"record","created_at":"2026-05-18T00:00:06Z","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":"2e2483ce66a00d22825e7c769e1802a95590214b84074e7e9425c97d36077713","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nucl-th","submitted_at":"2018-11-22T12:14:37Z","title_canon_sha256":"6873196bce1170f5efe379ced8fc4ae1337d02ed734138377dc07dd44ec3ff36"},"schema_version":"1.0","source":{"id":"1811.09130","kind":"arxiv","version":1}},"canonical_sha256":"933da9472a7801d03218dc5caede0eb373183c82e8944cecb13b207a78b89fcc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"933da9472a7801d03218dc5caede0eb373183c82e8944cecb13b207a78b89fcc","first_computed_at":"2026-05-18T00:00:06.980292Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:00:06.980292Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5/YAmffBXunXO3fRTPcrxCCiGwgBCRqpLUTVAh4xs17vmkOv84lGQScvmQgjGv4B34jZ37YMfhPkB1ud9vW3Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:00:06.980830Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.09130","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c85e40abb24fd7733cb759645d25d32b90ebe75c29afaa9bc631f20fd970b0d3","sha256:dc03d681bc87c38d9b4cab393d69fa31de0ce96e1bc5f5bd7f554743efcc30b4"],"state_sha256":"b3400dfcb925fe665918de3dd183f3b33b4782286124f5acc4ede038f91b19ed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EurevJgJwqgUnT/fVIxZNhtl8PgABPaUfIC8uncLd9/88YPOxOP0VrWm3yjRdEcWodoeKgTdpJBjUYf/116YCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:39:15.718080Z","bundle_sha256":"2cf75b500e7b3ba1ebdff46e7b59ce189f578e173075138274d995046ca1e31f"}}