{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:7WF43ZM4Q2BJUZKJTL4LG3GWJ4","short_pith_number":"pith:7WF43ZM4","canonical_record":{"source":{"id":"2009.05347","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-11T11:23:57Z","cross_cats_sorted":[],"title_canon_sha256":"ce900c79064e4fca17b8bece5e9770fcd90f41375ffc443dcd2705e42b50decd","abstract_canon_sha256":"fa4908af21c7cd4547d5754620dcef6079a41767839aa341d203c540962612fc"},"schema_version":"1.0"},"canonical_sha256":"fd8bcde59c86829a65499af8b36cd64f023e4a5d0abc60edb331fbf230d973fe","source":{"kind":"arxiv","id":"2009.05347","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.05347","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"arxiv_version","alias_value":"2009.05347v1","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.05347","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"pith_short_12","alias_value":"7WF43ZM4Q2BJ","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"pith_short_16","alias_value":"7WF43ZM4Q2BJUZKJ","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"pith_short_8","alias_value":"7WF43ZM4","created_at":"2026-07-05T01:34:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:7WF43ZM4Q2BJUZKJTL4LG3GWJ4","target":"record","payload":{"canonical_record":{"source":{"id":"2009.05347","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-11T11:23:57Z","cross_cats_sorted":[],"title_canon_sha256":"ce900c79064e4fca17b8bece5e9770fcd90f41375ffc443dcd2705e42b50decd","abstract_canon_sha256":"fa4908af21c7cd4547d5754620dcef6079a41767839aa341d203c540962612fc"},"schema_version":"1.0"},"canonical_sha256":"fd8bcde59c86829a65499af8b36cd64f023e4a5d0abc60edb331fbf230d973fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:34:44.693284Z","signature_b64":"p2x57vUPKurEN8If7pOkK2bSVbpaeXszfwClTPsoY8We/JKL6jtf92M7cWWqRVr3UIzDpovolOCfKlJJjqkeAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fd8bcde59c86829a65499af8b36cd64f023e4a5d0abc60edb331fbf230d973fe","last_reissued_at":"2026-07-05T01:34:44.692797Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:34:44.692797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.05347","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":"2026-07-05T01:34:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mzsBQ+zj2Y4guJKnHYdl8FXMWctt7ozuLo2z193lKYJw81U1n3NYZxJasynAqutSp2Z8pH/ION7OWhsatxxVDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T07:41:18.883014Z"},"content_sha256":"3a454e3cc6dafe39f50b7dd79dab3c2ca7cf8ed9401654c8f8e743ac9e0bf571","schema_version":"1.0","event_id":"sha256:3a454e3cc6dafe39f50b7dd79dab3c2ca7cf8ed9401654c8f8e743ac9e0bf571"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:7WF43ZM4Q2BJUZKJTL4LG3GWJ4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A First Principles Study of Zirconium Grain Boundaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Adam J Plowman, Christopher P Race","submitted_at":"2020-09-11T11:23:57Z","abstract_excerpt":"We present the results of first-principles calculations of selected structural and thermodynamic properties of a set of grain boundaries (GBs) in zirconium, spanning a range of misorientation angles and boundary planes. We performed plane-wave density functional theory calculations on low-sigma grain boundaries - five symmetric tilt GBs (STGBs) and three twist GBs; all with misorientation axes about [0001] and in optimised microscopic configurations - to gain insight into the associated atomistic structures. From studying the interface energetics, we found that higher GB excess volumes tended "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.05347","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/2009.05347/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":"2026-07-05T01:34:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IGRL2lT9jkKdWyaY3xeSd9oCnPVOXthm88tx3Pza+uQ40p9UHdZdWkTpeWtWlBKoTQF79kDDhL2KuUpbao7NAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T07:41:18.883513Z"},"content_sha256":"a1531376a827031e29263ac6555e1b90b946fc626f42ce49ce0e6b7d0b5b7e15","schema_version":"1.0","event_id":"sha256:a1531376a827031e29263ac6555e1b90b946fc626f42ce49ce0e6b7d0b5b7e15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7WF43ZM4Q2BJUZKJTL4LG3GWJ4/bundle.json","state_url":"https://pith.science/pith/7WF43ZM4Q2BJUZKJTL4LG3GWJ4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7WF43ZM4Q2BJUZKJTL4LG3GWJ4/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":"2026-08-11T07:41:18Z","links":{"resolver":"https://pith.science/pith/7WF43ZM4Q2BJUZKJTL4LG3GWJ4","bundle":"https://pith.science/pith/7WF43ZM4Q2BJUZKJTL4LG3GWJ4/bundle.json","state":"https://pith.science/pith/7WF43ZM4Q2BJUZKJTL4LG3GWJ4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7WF43ZM4Q2BJUZKJTL4LG3GWJ4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:7WF43ZM4Q2BJUZKJTL4LG3GWJ4","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":"fa4908af21c7cd4547d5754620dcef6079a41767839aa341d203c540962612fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-11T11:23:57Z","title_canon_sha256":"ce900c79064e4fca17b8bece5e9770fcd90f41375ffc443dcd2705e42b50decd"},"schema_version":"1.0","source":{"id":"2009.05347","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.05347","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"arxiv_version","alias_value":"2009.05347v1","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.05347","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"pith_short_12","alias_value":"7WF43ZM4Q2BJ","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"pith_short_16","alias_value":"7WF43ZM4Q2BJUZKJ","created_at":"2026-07-05T01:34:44Z"},{"alias_kind":"pith_short_8","alias_value":"7WF43ZM4","created_at":"2026-07-05T01:34:44Z"}],"graph_snapshots":[{"event_id":"sha256:a1531376a827031e29263ac6555e1b90b946fc626f42ce49ce0e6b7d0b5b7e15","target":"graph","created_at":"2026-07-05T01:34:44Z","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/2009.05347/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the results of first-principles calculations of selected structural and thermodynamic properties of a set of grain boundaries (GBs) in zirconium, spanning a range of misorientation angles and boundary planes. We performed plane-wave density functional theory calculations on low-sigma grain boundaries - five symmetric tilt GBs (STGBs) and three twist GBs; all with misorientation axes about [0001] and in optimised microscopic configurations - to gain insight into the associated atomistic structures. From studying the interface energetics, we found that higher GB excess volumes tended ","authors_text":"Adam J Plowman, Christopher P Race","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-11T11:23:57Z","title":"A First Principles Study of Zirconium Grain Boundaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.05347","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":"sha256:3a454e3cc6dafe39f50b7dd79dab3c2ca7cf8ed9401654c8f8e743ac9e0bf571","target":"record","created_at":"2026-07-05T01:34:44Z","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":"fa4908af21c7cd4547d5754620dcef6079a41767839aa341d203c540962612fc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-11T11:23:57Z","title_canon_sha256":"ce900c79064e4fca17b8bece5e9770fcd90f41375ffc443dcd2705e42b50decd"},"schema_version":"1.0","source":{"id":"2009.05347","kind":"arxiv","version":1}},"canonical_sha256":"fd8bcde59c86829a65499af8b36cd64f023e4a5d0abc60edb331fbf230d973fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fd8bcde59c86829a65499af8b36cd64f023e4a5d0abc60edb331fbf230d973fe","first_computed_at":"2026-07-05T01:34:44.692797Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:34:44.692797Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"p2x57vUPKurEN8If7pOkK2bSVbpaeXszfwClTPsoY8We/JKL6jtf92M7cWWqRVr3UIzDpovolOCfKlJJjqkeAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:34:44.693284Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.05347","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a454e3cc6dafe39f50b7dd79dab3c2ca7cf8ed9401654c8f8e743ac9e0bf571","sha256:a1531376a827031e29263ac6555e1b90b946fc626f42ce49ce0e6b7d0b5b7e15"],"state_sha256":"8b38c2d2788e72d5bcc72ddd2816f935da4f4b62a1460426fb22f8b44a0e24d0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p5oGHUNZVQm6ezhTtHpGOgt8WhdiLTcSWEfKoXTuvjHOy1YN2S330FyGw6YJdz0O2Qj9mQVjXqGj0Nvbp4mnDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T07:41:18.888584Z","bundle_sha256":"b1436dea26c3d77fca8e7e7d0ccb3a012361379c38bcbfedf569f863a9b18c03"}}