{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:COB3J5SAQY3MWNF7GSUAYJCSCR","short_pith_number":"pith:COB3J5SA","canonical_record":{"source":{"id":"1901.00788","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-03T15:22:44Z","cross_cats_sorted":[],"title_canon_sha256":"f976178a56c868fa224be82e5d4801d595ae3f52677928c7809b00b1baf18280","abstract_canon_sha256":"d0a48ce7b2b4f6cf00f9da778c69a3a22930ab82be4eef694459d5929d6ed22c"},"schema_version":"1.0"},"canonical_sha256":"1383b4f6408636cb34bf34a80c24521448c3895a951cb9d06cbf154e60a53649","source":{"kind":"arxiv","id":"1901.00788","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.00788","created_at":"2026-05-17T23:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1901.00788v2","created_at":"2026-05-17T23:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.00788","created_at":"2026-05-17T23:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"COB3J5SAQY3M","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"COB3J5SAQY3MWNF7","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"COB3J5SA","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:COB3J5SAQY3MWNF7GSUAYJCSCR","target":"record","payload":{"canonical_record":{"source":{"id":"1901.00788","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-03T15:22:44Z","cross_cats_sorted":[],"title_canon_sha256":"f976178a56c868fa224be82e5d4801d595ae3f52677928c7809b00b1baf18280","abstract_canon_sha256":"d0a48ce7b2b4f6cf00f9da778c69a3a22930ab82be4eef694459d5929d6ed22c"},"schema_version":"1.0"},"canonical_sha256":"1383b4f6408636cb34bf34a80c24521448c3895a951cb9d06cbf154e60a53649","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:50:08.738526Z","signature_b64":"D27Qvd4ocaLf5A+Si+a4x2cpyBgRyu5atLPkad2s6T/kkggX0Vd+aP73pj33D7ORaE5gZudUn4i/9mNa6kIIBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1383b4f6408636cb34bf34a80c24521448c3895a951cb9d06cbf154e60a53649","last_reissued_at":"2026-05-17T23:50:08.738101Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:50:08.738101Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.00788","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rXfGY5B+tRBDnMTUoclbs7jPKv0lKL/uNHd9gWRiK6UCucmUIq7jx4QDLrd2RhLhIk1WbnjIriHCWcEhl6LWAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:31:51.433455Z"},"content_sha256":"52e6d97a9c523d40f4a955b8f83f6fe8f20e4cad2293917d69afcb86f8685269","schema_version":"1.0","event_id":"sha256:52e6d97a9c523d40f4a955b8f83f6fe8f20e4cad2293917d69afcb86f8685269"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:COB3J5SAQY3MWNF7GSUAYJCSCR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Classification of Local Chemical Environments from X-ray Absorption Spectra using Supervised Machine Learning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Deyu Lu, Matthew R. Carbone, Mehmet Topsakal, Shinjae Yoo","submitted_at":"2019-01-03T15:22:44Z","abstract_excerpt":"X-ray absorption spectroscopy is a premier element-specific technique for materials characterization. Specifically, the x-ray absorption near-edge structure (XANES) encodes important information about the local chemical environment of an absorbing atom, including coordination number, symmetry, and oxidation state. Interpreting XANES spectra is a key step towards understanding the structural and electronic properties of materials, and as such, extracting structural and electronic descriptors from XANES spectra is akin to solving a challenging inverse problem. Existing methods rely on empirical "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.00788","kind":"arxiv","version":2},"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":"2026-05-17T23:50:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1f1Is/1/KNhbuNSvD/KzFC8+OqVlYy8rmTGCLCifiL4qUTaeZ42F8K2JdALb+kJFnHkA+TW+GCyNTy36IbFBBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T07:31:51.434184Z"},"content_sha256":"984a22026077f2f9604443dc4051e2a9bab18f5c61863ea9b9ca1480f16fd144","schema_version":"1.0","event_id":"sha256:984a22026077f2f9604443dc4051e2a9bab18f5c61863ea9b9ca1480f16fd144"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/COB3J5SAQY3MWNF7GSUAYJCSCR/bundle.json","state_url":"https://pith.science/pith/COB3J5SAQY3MWNF7GSUAYJCSCR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/COB3J5SAQY3MWNF7GSUAYJCSCR/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":"2026-05-31T07:31:51Z","links":{"resolver":"https://pith.science/pith/COB3J5SAQY3MWNF7GSUAYJCSCR","bundle":"https://pith.science/pith/COB3J5SAQY3MWNF7GSUAYJCSCR/bundle.json","state":"https://pith.science/pith/COB3J5SAQY3MWNF7GSUAYJCSCR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/COB3J5SAQY3MWNF7GSUAYJCSCR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:COB3J5SAQY3MWNF7GSUAYJCSCR","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":"d0a48ce7b2b4f6cf00f9da778c69a3a22930ab82be4eef694459d5929d6ed22c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-03T15:22:44Z","title_canon_sha256":"f976178a56c868fa224be82e5d4801d595ae3f52677928c7809b00b1baf18280"},"schema_version":"1.0","source":{"id":"1901.00788","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.00788","created_at":"2026-05-17T23:50:08Z"},{"alias_kind":"arxiv_version","alias_value":"1901.00788v2","created_at":"2026-05-17T23:50:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.00788","created_at":"2026-05-17T23:50:08Z"},{"alias_kind":"pith_short_12","alias_value":"COB3J5SAQY3M","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"COB3J5SAQY3MWNF7","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"COB3J5SA","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:984a22026077f2f9604443dc4051e2a9bab18f5c61863ea9b9ca1480f16fd144","target":"graph","created_at":"2026-05-17T23:50:08Z","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":"X-ray absorption spectroscopy is a premier element-specific technique for materials characterization. Specifically, the x-ray absorption near-edge structure (XANES) encodes important information about the local chemical environment of an absorbing atom, including coordination number, symmetry, and oxidation state. Interpreting XANES spectra is a key step towards understanding the structural and electronic properties of materials, and as such, extracting structural and electronic descriptors from XANES spectra is akin to solving a challenging inverse problem. Existing methods rely on empirical ","authors_text":"Deyu Lu, Matthew R. Carbone, Mehmet Topsakal, Shinjae Yoo","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-03T15:22:44Z","title":"Classification of Local Chemical Environments from X-ray Absorption Spectra using Supervised Machine Learning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.00788","kind":"arxiv","version":2},"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":"sha256:52e6d97a9c523d40f4a955b8f83f6fe8f20e4cad2293917d69afcb86f8685269","target":"record","created_at":"2026-05-17T23:50:08Z","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":"d0a48ce7b2b4f6cf00f9da778c69a3a22930ab82be4eef694459d5929d6ed22c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-01-03T15:22:44Z","title_canon_sha256":"f976178a56c868fa224be82e5d4801d595ae3f52677928c7809b00b1baf18280"},"schema_version":"1.0","source":{"id":"1901.00788","kind":"arxiv","version":2}},"canonical_sha256":"1383b4f6408636cb34bf34a80c24521448c3895a951cb9d06cbf154e60a53649","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1383b4f6408636cb34bf34a80c24521448c3895a951cb9d06cbf154e60a53649","first_computed_at":"2026-05-17T23:50:08.738101Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:50:08.738101Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D27Qvd4ocaLf5A+Si+a4x2cpyBgRyu5atLPkad2s6T/kkggX0Vd+aP73pj33D7ORaE5gZudUn4i/9mNa6kIIBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:50:08.738526Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.00788","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:52e6d97a9c523d40f4a955b8f83f6fe8f20e4cad2293917d69afcb86f8685269","sha256:984a22026077f2f9604443dc4051e2a9bab18f5c61863ea9b9ca1480f16fd144"],"state_sha256":"702cf804baf3571ae3f3834280b0f25604089fc3cbda95efb1c3223ec5ac29a4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GGR5C00azHdyFHaqKWC4rBIj9MkIhd1VQzvrduqcUWiczLAKm6o+ypYVvfM3CCWaZ6hWg2LE8Ab+co4BZ2JzDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T07:31:51.438545Z","bundle_sha256":"61cba053ea4a539a03122ae15557ce8426d0cf32979e65ee01e2b0113ae4feaf"}}