{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:UHFP2324AQCVIHMUKU357SJGNJ","short_pith_number":"pith:UHFP2324","canonical_record":{"source":{"id":"1908.06518","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-18T21:41:38Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"2e1c92d776d6c7ed2314c8131247dc4a959ffdf42c8826ea7beafb637656f164","abstract_canon_sha256":"8a7366db8cf364fe78cd055823afafa22ffcb4c35dad83ab2198a4fb68660bc7"},"schema_version":"1.0"},"canonical_sha256":"a1cafd6f5c0405541d945537dfc9266a7c556f58db489dbd8e0b302259529200","source":{"kind":"arxiv","id":"1908.06518","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.06518","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"arxiv_version","alias_value":"1908.06518v1","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06518","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"pith_short_12","alias_value":"UHFP2324AQCV","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"pith_short_16","alias_value":"UHFP2324AQCVIHMU","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"pith_short_8","alias_value":"UHFP2324","created_at":"2026-07-04T23:58:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:UHFP2324AQCVIHMUKU357SJGNJ","target":"record","payload":{"canonical_record":{"source":{"id":"1908.06518","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-18T21:41:38Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"2e1c92d776d6c7ed2314c8131247dc4a959ffdf42c8826ea7beafb637656f164","abstract_canon_sha256":"8a7366db8cf364fe78cd055823afafa22ffcb4c35dad83ab2198a4fb68660bc7"},"schema_version":"1.0"},"canonical_sha256":"a1cafd6f5c0405541d945537dfc9266a7c556f58db489dbd8e0b302259529200","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:58:16.863856Z","signature_b64":"QtqKlZNJceFn+KIXA8hYZE5rsKsrLMbq08ntxU0FaZVJ6ILEkinQONYVD2PTHhtzdAEDviPAhq6L/Vmm8F+SCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1cafd6f5c0405541d945537dfc9266a7c556f58db489dbd8e0b302259529200","last_reissued_at":"2026-07-04T23:58:16.863523Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:58:16.863523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.06518","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":"2026-07-04T23:58:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eSf4GJuGgLVnP4elXz31NxThtGqWxK3mceV3XP2lNhIMGp8aSk53QWR2Qlc7zNynghDa8a6lPU1kruTGC5AIBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T04:20:29.312260Z"},"content_sha256":"964164ecc02e5393efe77b64db3b30f87d9892a6f1c5683fac0f388a1b5b61da","schema_version":"1.0","event_id":"sha256:964164ecc02e5393efe77b64db3b30f87d9892a6f1c5683fac0f388a1b5b61da"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:UHFP2324AQCVIHMUKU357SJGNJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Determination of fracture toughness of thin-film amorphous silicon using spiral crack structures","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Torsten Bronger","submitted_at":"2019-08-18T21:41:38Z","abstract_excerpt":"We prepared thin layers of amorphous silicon by deposition of a liquid-phase polysilane precurser on glass substrate. Raman scattering provides evidence for residual tensile stress in the silicon, which is evaluated quantitatively. Under treatment with hydrofluoric acid, this stress leads to spiral cracks in the silicon. We explain the process of crack formation and examine this phenomenon both analytically and numerically, the latter with the finite element method (FEM). The FEM yields the geometry correction factor for such spiral cracks in terms of the Griffith criterion. This allows for th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06518","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/1908.06518/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":"2026-07-04T23:58:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZLOp630Rj6rvAoMbSzgQFuvfeww/jOjeO6rABfvlwy99EukpxhaAS+9ei1etHyBgln3L0zHFAUCSeNm/Tn0rCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T04:20:29.313150Z"},"content_sha256":"a651dfe15beb5eaded764bb6d97b9bbdf6ce1b2486fa214a60c1db779b750b5b","schema_version":"1.0","event_id":"sha256:a651dfe15beb5eaded764bb6d97b9bbdf6ce1b2486fa214a60c1db779b750b5b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UHFP2324AQCVIHMUKU357SJGNJ/bundle.json","state_url":"https://pith.science/pith/UHFP2324AQCVIHMUKU357SJGNJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UHFP2324AQCVIHMUKU357SJGNJ/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":"2026-08-16T04:20:29Z","links":{"resolver":"https://pith.science/pith/UHFP2324AQCVIHMUKU357SJGNJ","bundle":"https://pith.science/pith/UHFP2324AQCVIHMUKU357SJGNJ/bundle.json","state":"https://pith.science/pith/UHFP2324AQCVIHMUKU357SJGNJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UHFP2324AQCVIHMUKU357SJGNJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:UHFP2324AQCVIHMUKU357SJGNJ","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":"8a7366db8cf364fe78cd055823afafa22ffcb4c35dad83ab2198a4fb68660bc7","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-18T21:41:38Z","title_canon_sha256":"2e1c92d776d6c7ed2314c8131247dc4a959ffdf42c8826ea7beafb637656f164"},"schema_version":"1.0","source":{"id":"1908.06518","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.06518","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"arxiv_version","alias_value":"1908.06518v1","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.06518","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"pith_short_12","alias_value":"UHFP2324AQCV","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"pith_short_16","alias_value":"UHFP2324AQCVIHMU","created_at":"2026-07-04T23:58:16Z"},{"alias_kind":"pith_short_8","alias_value":"UHFP2324","created_at":"2026-07-04T23:58:16Z"}],"graph_snapshots":[{"event_id":"sha256:a651dfe15beb5eaded764bb6d97b9bbdf6ce1b2486fa214a60c1db779b750b5b","target":"graph","created_at":"2026-07-04T23:58:16Z","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/1908.06518/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We prepared thin layers of amorphous silicon by deposition of a liquid-phase polysilane precurser on glass substrate. Raman scattering provides evidence for residual tensile stress in the silicon, which is evaluated quantitatively. Under treatment with hydrofluoric acid, this stress leads to spiral cracks in the silicon. We explain the process of crack formation and examine this phenomenon both analytically and numerically, the latter with the finite element method (FEM). The FEM yields the geometry correction factor for such spiral cracks in terms of the Griffith criterion. This allows for th","authors_text":"Torsten Bronger","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-18T21:41:38Z","title":"Determination of fracture toughness of thin-film amorphous silicon using spiral crack structures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.06518","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":"sha256:964164ecc02e5393efe77b64db3b30f87d9892a6f1c5683fac0f388a1b5b61da","target":"record","created_at":"2026-07-04T23:58:16Z","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":"8a7366db8cf364fe78cd055823afafa22ffcb4c35dad83ab2198a4fb68660bc7","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"physics.app-ph","submitted_at":"2019-08-18T21:41:38Z","title_canon_sha256":"2e1c92d776d6c7ed2314c8131247dc4a959ffdf42c8826ea7beafb637656f164"},"schema_version":"1.0","source":{"id":"1908.06518","kind":"arxiv","version":1}},"canonical_sha256":"a1cafd6f5c0405541d945537dfc9266a7c556f58db489dbd8e0b302259529200","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1cafd6f5c0405541d945537dfc9266a7c556f58db489dbd8e0b302259529200","first_computed_at":"2026-07-04T23:58:16.863523Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:58:16.863523Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QtqKlZNJceFn+KIXA8hYZE5rsKsrLMbq08ntxU0FaZVJ6ILEkinQONYVD2PTHhtzdAEDviPAhq6L/Vmm8F+SCg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:58:16.863856Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.06518","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:964164ecc02e5393efe77b64db3b30f87d9892a6f1c5683fac0f388a1b5b61da","sha256:a651dfe15beb5eaded764bb6d97b9bbdf6ce1b2486fa214a60c1db779b750b5b"],"state_sha256":"a2f0371b19ac4024dfbc3977df0f70670e174477a1fce59de291c0f61b3b4390"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"azfiNWp+17var3MFuIgzuuCTTznLiMkav0JDUgOrQQh95AxGzbfKLERiuxLvCDF1q4XMtDrQ6kPjE2WRkmq/Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T04:20:29.317228Z","bundle_sha256":"55084637059f1ddc00093f7f1ef61278badf6143366a532ae10a9671e0da966a"}}