{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VLDYRYJI5HHXIEE5NOV7P4CCUC","short_pith_number":"pith:VLDYRYJI","canonical_record":{"source":{"id":"1806.07923","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-06-20T18:42:37Z","cross_cats_sorted":[],"title_canon_sha256":"7524afa30b5b304536a9158d75587601f1eb5769fd3b1ff06b34320648d9eec7","abstract_canon_sha256":"7b667e1147ec33c35fd4ebf06ebe583682bd184e4bc38e3bef72b8822a874071"},"schema_version":"1.0"},"canonical_sha256":"aac788e128e9cf74109d6babf7f042a0884a9d33578565ec8cc3f431fe85991e","source":{"kind":"arxiv","id":"1806.07923","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.07923","created_at":"2026-05-17T23:53:30Z"},{"alias_kind":"arxiv_version","alias_value":"1806.07923v2","created_at":"2026-05-17T23:53:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.07923","created_at":"2026-05-17T23:53:30Z"},{"alias_kind":"pith_short_12","alias_value":"VLDYRYJI5HHX","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VLDYRYJI5HHXIEE5","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VLDYRYJI","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VLDYRYJI5HHXIEE5NOV7P4CCUC","target":"record","payload":{"canonical_record":{"source":{"id":"1806.07923","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-06-20T18:42:37Z","cross_cats_sorted":[],"title_canon_sha256":"7524afa30b5b304536a9158d75587601f1eb5769fd3b1ff06b34320648d9eec7","abstract_canon_sha256":"7b667e1147ec33c35fd4ebf06ebe583682bd184e4bc38e3bef72b8822a874071"},"schema_version":"1.0"},"canonical_sha256":"aac788e128e9cf74109d6babf7f042a0884a9d33578565ec8cc3f431fe85991e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:53:30.638420Z","signature_b64":"XX1Wj5BjMAenGQ48zRt9EHT+pBuagN4Qtr77nAXHJ0lXb4VpYdzHZaEEUmos+SnGlHcU9uEFp+VOTN5fK83GBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aac788e128e9cf74109d6babf7f042a0884a9d33578565ec8cc3f431fe85991e","last_reissued_at":"2026-05-17T23:53:30.637874Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:53:30.637874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.07923","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":"2026-05-17T23:53:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QRj/hJcCbCMYtympwIfgDZyZo5Z4yaBNk0yLg/bkpp+wmsQj+4XGVYgbXmpt5/aHRB+1hHBH72OiwFsFgJfaAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:46:22.547454Z"},"content_sha256":"611cb8d13c0cf88d5d4299fd1d67bd4d8e2e398fea47a05ba9f8afb747bbe6ba","schema_version":"1.0","event_id":"sha256:611cb8d13c0cf88d5d4299fd1d67bd4d8e2e398fea47a05ba9f8afb747bbe6ba"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VLDYRYJI5HHXIEE5NOV7P4CCUC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pronounced grain boundary network evolution in nanocrystalline Cu subjected to large cyclic strains","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"David B. Bober, Mukul Kumar, Thomas Lagrange, Timothy J. Rupert","submitted_at":"2018-06-20T18:42:37Z","abstract_excerpt":"The grain boundary network of nanocrystalline Cu foils was modified by the systematic application of cyclic loadings and elevated temperatures having a range of magnitudes. Most broadly, the changes to the boundary network were directly correlated to the applied temperature and accumulated strain, including a 300% increase in the twin length fraction. By independently varying each treatment variable, a matrix of grain boundary statistics was built to check the plausibility of hypothesized mechanisms against their expected temperature and stress/strain dependences. These comparisons allow the f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.07923","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":"2026-05-17T23:53:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wT++UJ8fI5nxWALGSri6jKO4kQ1hTUDeQMrauvDQmMhAmYLOz2by2T860pKJcxK2/ReUrD+RVNs9o0PhIVfSAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T12:46:22.547808Z"},"content_sha256":"4deaa29b3a650dca03ed6cb86ab6974aaf58dd81e84d1273c71b89c71322ca83","schema_version":"1.0","event_id":"sha256:4deaa29b3a650dca03ed6cb86ab6974aaf58dd81e84d1273c71b89c71322ca83"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VLDYRYJI5HHXIEE5NOV7P4CCUC/bundle.json","state_url":"https://pith.science/pith/VLDYRYJI5HHXIEE5NOV7P4CCUC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VLDYRYJI5HHXIEE5NOV7P4CCUC/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":"2026-06-05T12:46:22Z","links":{"resolver":"https://pith.science/pith/VLDYRYJI5HHXIEE5NOV7P4CCUC","bundle":"https://pith.science/pith/VLDYRYJI5HHXIEE5NOV7P4CCUC/bundle.json","state":"https://pith.science/pith/VLDYRYJI5HHXIEE5NOV7P4CCUC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VLDYRYJI5HHXIEE5NOV7P4CCUC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VLDYRYJI5HHXIEE5NOV7P4CCUC","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":"7b667e1147ec33c35fd4ebf06ebe583682bd184e4bc38e3bef72b8822a874071","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-06-20T18:42:37Z","title_canon_sha256":"7524afa30b5b304536a9158d75587601f1eb5769fd3b1ff06b34320648d9eec7"},"schema_version":"1.0","source":{"id":"1806.07923","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.07923","created_at":"2026-05-17T23:53:30Z"},{"alias_kind":"arxiv_version","alias_value":"1806.07923v2","created_at":"2026-05-17T23:53:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.07923","created_at":"2026-05-17T23:53:30Z"},{"alias_kind":"pith_short_12","alias_value":"VLDYRYJI5HHX","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VLDYRYJI5HHXIEE5","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VLDYRYJI","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:4deaa29b3a650dca03ed6cb86ab6974aaf58dd81e84d1273c71b89c71322ca83","target":"graph","created_at":"2026-05-17T23:53:30Z","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":"The grain boundary network of nanocrystalline Cu foils was modified by the systematic application of cyclic loadings and elevated temperatures having a range of magnitudes. Most broadly, the changes to the boundary network were directly correlated to the applied temperature and accumulated strain, including a 300% increase in the twin length fraction. By independently varying each treatment variable, a matrix of grain boundary statistics was built to check the plausibility of hypothesized mechanisms against their expected temperature and stress/strain dependences. These comparisons allow the f","authors_text":"David B. Bober, Mukul Kumar, Thomas Lagrange, Timothy J. Rupert","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-06-20T18:42:37Z","title":"Pronounced grain boundary network evolution in nanocrystalline Cu subjected to large cyclic strains"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.07923","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":"sha256:611cb8d13c0cf88d5d4299fd1d67bd4d8e2e398fea47a05ba9f8afb747bbe6ba","target":"record","created_at":"2026-05-17T23:53:30Z","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":"7b667e1147ec33c35fd4ebf06ebe583682bd184e4bc38e3bef72b8822a874071","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-06-20T18:42:37Z","title_canon_sha256":"7524afa30b5b304536a9158d75587601f1eb5769fd3b1ff06b34320648d9eec7"},"schema_version":"1.0","source":{"id":"1806.07923","kind":"arxiv","version":2}},"canonical_sha256":"aac788e128e9cf74109d6babf7f042a0884a9d33578565ec8cc3f431fe85991e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aac788e128e9cf74109d6babf7f042a0884a9d33578565ec8cc3f431fe85991e","first_computed_at":"2026-05-17T23:53:30.637874Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:30.637874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XX1Wj5BjMAenGQ48zRt9EHT+pBuagN4Qtr77nAXHJ0lXb4VpYdzHZaEEUmos+SnGlHcU9uEFp+VOTN5fK83GBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:30.638420Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.07923","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:611cb8d13c0cf88d5d4299fd1d67bd4d8e2e398fea47a05ba9f8afb747bbe6ba","sha256:4deaa29b3a650dca03ed6cb86ab6974aaf58dd81e84d1273c71b89c71322ca83"],"state_sha256":"f3d2345dd9e920a11b78f56ec2e425546bd0239bce3771400479392d7b6ccebd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OeSeN10dVUnBh+a2kqtn8rg7M6+ZyuAAWRGbKcIgOxNglujzFsuahhOVhwnYvzPUvX1Q6AaGpwAq5tFrjDg3Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T12:46:22.549799Z","bundle_sha256":"61033a14aa4e44210dd94a7fd7ab399fd2078a6a734a514bfb1932b785be3eab"}}