{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:JVOK6DUWKJMU2KDIPROKLZCNIT","short_pith_number":"pith:JVOK6DUW","canonical_record":{"source":{"id":"1403.1887","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-03-07T21:59:55Z","cross_cats_sorted":[],"title_canon_sha256":"17f5a3de8edc226f30efd27967ad9b6d7b76fd88b13d5a615452fd103d7d61ad","abstract_canon_sha256":"fc43c680bcf30eb0e5436fedc80b5bd3b5ba6cfd89c3caa44643a0a6a51435ae"},"schema_version":"1.0"},"canonical_sha256":"4d5caf0e9652594d28687c5ca5e44d44eb7ad8848205c5b8b5abda6d35740990","source":{"kind":"arxiv","id":"1403.1887","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.1887","created_at":"2026-05-18T01:23:50Z"},{"alias_kind":"arxiv_version","alias_value":"1403.1887v2","created_at":"2026-05-18T01:23:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.1887","created_at":"2026-05-18T01:23:50Z"},{"alias_kind":"pith_short_12","alias_value":"JVOK6DUWKJMU","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JVOK6DUWKJMU2KDI","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JVOK6DUW","created_at":"2026-05-18T12:28:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:JVOK6DUWKJMU2KDIPROKLZCNIT","target":"record","payload":{"canonical_record":{"source":{"id":"1403.1887","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-03-07T21:59:55Z","cross_cats_sorted":[],"title_canon_sha256":"17f5a3de8edc226f30efd27967ad9b6d7b76fd88b13d5a615452fd103d7d61ad","abstract_canon_sha256":"fc43c680bcf30eb0e5436fedc80b5bd3b5ba6cfd89c3caa44643a0a6a51435ae"},"schema_version":"1.0"},"canonical_sha256":"4d5caf0e9652594d28687c5ca5e44d44eb7ad8848205c5b8b5abda6d35740990","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:50.967026Z","signature_b64":"f+/W2RRRq/Efpl92pzGwM72btJsrFriFcPUAx5CXLNFzEHhlnSRYH99pTDbWCbJlT7IQnO2iQIBFW1oCV9q/Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4d5caf0e9652594d28687c5ca5e44d44eb7ad8848205c5b8b5abda6d35740990","last_reissued_at":"2026-05-18T01:23:50.966389Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:50.966389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1403.1887","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":"2026-05-18T01:23:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ImrUPrgEzZYVWqElBu4hPem73kA1vGFVdqSnrhqRdxvyt8TcRRJI+zDKuR6A5awfwINQoXE+SxzUhT36BhTPAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T15:53:01.612569Z"},"content_sha256":"7ddcaad803acb909491777b12e7d7295fb57ab84f8eac3b79bcd3b1f612bd8f4","schema_version":"1.0","event_id":"sha256:7ddcaad803acb909491777b12e7d7295fb57ab84f8eac3b79bcd3b1f612bd8f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:JVOK6DUWKJMU2KDIPROKLZCNIT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-ductile and low friction epoxy matrix composites","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alberto Taglafierro, Anderson O. Okonkwo, Francisco C. Robles Hernandez, John E. Garc\\'ia Herrera, Juan Mu\\~noz Salda\\~na, Pravin Jagadale, Viktor G. Hadjiev","submitted_at":"2014-03-07T21:59:55Z","abstract_excerpt":"We present the results of an effective reinforcement of epoxy resin matrix with fullerene carbon soot. The optimal carbon soot addition of 1 wt. % results in a toughness improvement of almost 20 times. The optimized soot-epoxy composites also show an increase in tensile elongation of more than 13 %, thus indicating a change of the failure mechanism in tension from brittle to ductile. Additionally, the coefficient of friction is reduced from its 0.91 value in plain epoxy resin to 0.15 in the optimized composite. In the optimized composite, the lateral forces during nanoscratching decrease as mu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.1887","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":"2026-05-18T01:23:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bwAgZvXRzNpWfq0BPmMngNl8GR512bu4cive9qBOZKe7PoLc+d+yesjBhqxwoTOfsGvnnPblyCEA2lnSqUXWDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T15:53:01.613135Z"},"content_sha256":"980e1afcd713033111617cf08a16f83cf0492cf01ad568b9593c92aca0df5716","schema_version":"1.0","event_id":"sha256:980e1afcd713033111617cf08a16f83cf0492cf01ad568b9593c92aca0df5716"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JVOK6DUWKJMU2KDIPROKLZCNIT/bundle.json","state_url":"https://pith.science/pith/JVOK6DUWKJMU2KDIPROKLZCNIT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JVOK6DUWKJMU2KDIPROKLZCNIT/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":"2026-08-05T15:53:01Z","links":{"resolver":"https://pith.science/pith/JVOK6DUWKJMU2KDIPROKLZCNIT","bundle":"https://pith.science/pith/JVOK6DUWKJMU2KDIPROKLZCNIT/bundle.json","state":"https://pith.science/pith/JVOK6DUWKJMU2KDIPROKLZCNIT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JVOK6DUWKJMU2KDIPROKLZCNIT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:JVOK6DUWKJMU2KDIPROKLZCNIT","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":"fc43c680bcf30eb0e5436fedc80b5bd3b5ba6cfd89c3caa44643a0a6a51435ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-03-07T21:59:55Z","title_canon_sha256":"17f5a3de8edc226f30efd27967ad9b6d7b76fd88b13d5a615452fd103d7d61ad"},"schema_version":"1.0","source":{"id":"1403.1887","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1403.1887","created_at":"2026-05-18T01:23:50Z"},{"alias_kind":"arxiv_version","alias_value":"1403.1887v2","created_at":"2026-05-18T01:23:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1403.1887","created_at":"2026-05-18T01:23:50Z"},{"alias_kind":"pith_short_12","alias_value":"JVOK6DUWKJMU","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"JVOK6DUWKJMU2KDI","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"JVOK6DUW","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:980e1afcd713033111617cf08a16f83cf0492cf01ad568b9593c92aca0df5716","target":"graph","created_at":"2026-05-18T01:23:50Z","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":"We present the results of an effective reinforcement of epoxy resin matrix with fullerene carbon soot. The optimal carbon soot addition of 1 wt. % results in a toughness improvement of almost 20 times. The optimized soot-epoxy composites also show an increase in tensile elongation of more than 13 %, thus indicating a change of the failure mechanism in tension from brittle to ductile. Additionally, the coefficient of friction is reduced from its 0.91 value in plain epoxy resin to 0.15 in the optimized composite. In the optimized composite, the lateral forces during nanoscratching decrease as mu","authors_text":"Alberto Taglafierro, Anderson O. Okonkwo, Francisco C. Robles Hernandez, John E. Garc\\'ia Herrera, Juan Mu\\~noz Salda\\~na, Pravin Jagadale, Viktor G. Hadjiev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-03-07T21:59:55Z","title":"Ultra-ductile and low friction epoxy matrix composites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1403.1887","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":"sha256:7ddcaad803acb909491777b12e7d7295fb57ab84f8eac3b79bcd3b1f612bd8f4","target":"record","created_at":"2026-05-18T01:23:50Z","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":"fc43c680bcf30eb0e5436fedc80b5bd3b5ba6cfd89c3caa44643a0a6a51435ae","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-03-07T21:59:55Z","title_canon_sha256":"17f5a3de8edc226f30efd27967ad9b6d7b76fd88b13d5a615452fd103d7d61ad"},"schema_version":"1.0","source":{"id":"1403.1887","kind":"arxiv","version":2}},"canonical_sha256":"4d5caf0e9652594d28687c5ca5e44d44eb7ad8848205c5b8b5abda6d35740990","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d5caf0e9652594d28687c5ca5e44d44eb7ad8848205c5b8b5abda6d35740990","first_computed_at":"2026-05-18T01:23:50.966389Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:50.966389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f+/W2RRRq/Efpl92pzGwM72btJsrFriFcPUAx5CXLNFzEHhlnSRYH99pTDbWCbJlT7IQnO2iQIBFW1oCV9q/Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:50.967026Z","signed_message":"canonical_sha256_bytes"},"source_id":"1403.1887","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ddcaad803acb909491777b12e7d7295fb57ab84f8eac3b79bcd3b1f612bd8f4","sha256:980e1afcd713033111617cf08a16f83cf0492cf01ad568b9593c92aca0df5716"],"state_sha256":"d861d2be8043142f436c3f9706ede9ff9d209ea82981e24593d7094a14003ec3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UJnPQJIvKipauvG/lGqZzipAI+LLhZ5F4Q+qbGRIxphvKTIxbHnLB3EOBnFUwYFfe1OUQVOVPRN+aoR0NnB2Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T15:53:01.616927Z","bundle_sha256":"75310cc989d9dd0dbaf7a2d64f92f10464af32efe95c5840e364aed4efc45d4b"}}