{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ZCSO6WSOU2Q4AQSAASJELJ7WZB","short_pith_number":"pith:ZCSO6WSO","canonical_record":{"source":{"id":"1509.04012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-14T09:48:14Z","cross_cats_sorted":[],"title_canon_sha256":"193e13cb3134eacee1c00c12d96c98b85c91e7db9c7d927ae0792c30be19853d","abstract_canon_sha256":"8ed32e63d5240422fa0bf738d593be0c8f006e15b73b4ca51fec218176752084"},"schema_version":"1.0"},"canonical_sha256":"c8a4ef5a4ea6a1c04240049245a7f6c84679b46ead9345284a0d306f67e4c69b","source":{"kind":"arxiv","id":"1509.04012","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.04012","created_at":"2026-05-18T01:33:08Z"},{"alias_kind":"arxiv_version","alias_value":"1509.04012v1","created_at":"2026-05-18T01:33:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.04012","created_at":"2026-05-18T01:33:08Z"},{"alias_kind":"pith_short_12","alias_value":"ZCSO6WSOU2Q4","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZCSO6WSOU2Q4AQSA","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZCSO6WSO","created_at":"2026-05-18T12:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ZCSO6WSOU2Q4AQSAASJELJ7WZB","target":"record","payload":{"canonical_record":{"source":{"id":"1509.04012","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-14T09:48:14Z","cross_cats_sorted":[],"title_canon_sha256":"193e13cb3134eacee1c00c12d96c98b85c91e7db9c7d927ae0792c30be19853d","abstract_canon_sha256":"8ed32e63d5240422fa0bf738d593be0c8f006e15b73b4ca51fec218176752084"},"schema_version":"1.0"},"canonical_sha256":"c8a4ef5a4ea6a1c04240049245a7f6c84679b46ead9345284a0d306f67e4c69b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:08.504585Z","signature_b64":"MYv2wwtDxB6NQh6o9AfH2SnZzO9tO67TJAjA3FBEVX6s2YQZYGWI7NvswB4ct+/ZbCnkRvdLxQKwmPEqBY8+Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c8a4ef5a4ea6a1c04240049245a7f6c84679b46ead9345284a0d306f67e4c69b","last_reissued_at":"2026-05-18T01:33:08.503907Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:08.503907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.04012","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":"2026-05-18T01:33:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JgXvZHWldKtXNwINDFQ5+5VRFpezEnmzwnM5y/DseH+U5iQGOffRSk4j6TqL+UsgyHmRwn8pCz3v2SR/Uw/ABg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:49:26.605774Z"},"content_sha256":"7e686b7d333b7dd1082098fae4398dee506366d83d81abc8ba29575bef2616e8","schema_version":"1.0","event_id":"sha256:7e686b7d333b7dd1082098fae4398dee506366d83d81abc8ba29575bef2616e8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ZCSO6WSOU2Q4AQSAASJELJ7WZB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mechanical Properties of Norway Spruce: Intra-Ring Variation and Generic Behavior of Earlywood and Latewood until Failure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Christian Lanvermann, Falk K. Wittel, Peter Niemz, Philipp Hass","submitted_at":"2015-09-14T09:48:14Z","abstract_excerpt":"The alternating earlywood and latewood growth ring structure has a strong influence on the mechanical performance of Norway spruce. In the current study, tensile tests in the longitudinal and tangential directions were performed on a series of specimens representing one growth ring at varying relative humidities. All tested mechanical parameters, namely modulus of elasticity and ultimate tensile stress, followed the density distribution in the growth ring, with the minimum values in earlywood and the maximum values in latewood. The samples were conditioned at three the relative humidities 50%,"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.04012","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":"2026-05-18T01:33:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NTdA7w+rEnAEj5UNDmA5Tm97cx43DAQ4w5tgjozFCrvnt0PXht0gCpGPAmPy9q5eMiE16xm9bJcGuyUF+FPGDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T22:49:26.606197Z"},"content_sha256":"2365318231d833c7924cfa6a9dad73323ce52952213da988eced0dd62eb23912","schema_version":"1.0","event_id":"sha256:2365318231d833c7924cfa6a9dad73323ce52952213da988eced0dd62eb23912"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZCSO6WSOU2Q4AQSAASJELJ7WZB/bundle.json","state_url":"https://pith.science/pith/ZCSO6WSOU2Q4AQSAASJELJ7WZB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZCSO6WSOU2Q4AQSAASJELJ7WZB/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":"2026-05-29T22:49:26Z","links":{"resolver":"https://pith.science/pith/ZCSO6WSOU2Q4AQSAASJELJ7WZB","bundle":"https://pith.science/pith/ZCSO6WSOU2Q4AQSAASJELJ7WZB/bundle.json","state":"https://pith.science/pith/ZCSO6WSOU2Q4AQSAASJELJ7WZB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZCSO6WSOU2Q4AQSAASJELJ7WZB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ZCSO6WSOU2Q4AQSAASJELJ7WZB","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":"8ed32e63d5240422fa0bf738d593be0c8f006e15b73b4ca51fec218176752084","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-14T09:48:14Z","title_canon_sha256":"193e13cb3134eacee1c00c12d96c98b85c91e7db9c7d927ae0792c30be19853d"},"schema_version":"1.0","source":{"id":"1509.04012","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.04012","created_at":"2026-05-18T01:33:08Z"},{"alias_kind":"arxiv_version","alias_value":"1509.04012v1","created_at":"2026-05-18T01:33:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.04012","created_at":"2026-05-18T01:33:08Z"},{"alias_kind":"pith_short_12","alias_value":"ZCSO6WSOU2Q4","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"ZCSO6WSOU2Q4AQSA","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"ZCSO6WSO","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:2365318231d833c7924cfa6a9dad73323ce52952213da988eced0dd62eb23912","target":"graph","created_at":"2026-05-18T01:33:08Z","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":"The alternating earlywood and latewood growth ring structure has a strong influence on the mechanical performance of Norway spruce. In the current study, tensile tests in the longitudinal and tangential directions were performed on a series of specimens representing one growth ring at varying relative humidities. All tested mechanical parameters, namely modulus of elasticity and ultimate tensile stress, followed the density distribution in the growth ring, with the minimum values in earlywood and the maximum values in latewood. The samples were conditioned at three the relative humidities 50%,","authors_text":"Christian Lanvermann, Falk K. Wittel, Peter Niemz, Philipp Hass","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-14T09:48:14Z","title":"Mechanical Properties of Norway Spruce: Intra-Ring Variation and Generic Behavior of Earlywood and Latewood until Failure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.04012","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":"sha256:7e686b7d333b7dd1082098fae4398dee506366d83d81abc8ba29575bef2616e8","target":"record","created_at":"2026-05-18T01:33:08Z","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":"8ed32e63d5240422fa0bf738d593be0c8f006e15b73b4ca51fec218176752084","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-09-14T09:48:14Z","title_canon_sha256":"193e13cb3134eacee1c00c12d96c98b85c91e7db9c7d927ae0792c30be19853d"},"schema_version":"1.0","source":{"id":"1509.04012","kind":"arxiv","version":1}},"canonical_sha256":"c8a4ef5a4ea6a1c04240049245a7f6c84679b46ead9345284a0d306f67e4c69b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8a4ef5a4ea6a1c04240049245a7f6c84679b46ead9345284a0d306f67e4c69b","first_computed_at":"2026-05-18T01:33:08.503907Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:33:08.503907Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MYv2wwtDxB6NQh6o9AfH2SnZzO9tO67TJAjA3FBEVX6s2YQZYGWI7NvswB4ct+/ZbCnkRvdLxQKwmPEqBY8+Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:33:08.504585Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.04012","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e686b7d333b7dd1082098fae4398dee506366d83d81abc8ba29575bef2616e8","sha256:2365318231d833c7924cfa6a9dad73323ce52952213da988eced0dd62eb23912"],"state_sha256":"49ce9f55bf34cc000bee1449b67a9441c05e7889f90fefe5b60f3491edf3a1ec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M8kaLKEd5NhbZs0khSi72bKLa+lUvBP8xPJTvbG979lQ8Klsd3S8J4W2xq+cH2q6Nhq41eudS3tiazF1PKSaDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T22:49:26.608613Z","bundle_sha256":"475359e7a77723d9fdb3dafa78cefd1872678dbf23f2f6fb213ee6b2e2a96060"}}