{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:SXVM6TXC7ZA4JOALAASCTNH4WK","short_pith_number":"pith:SXVM6TXC","canonical_record":{"source":{"id":"1504.00956","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-03T23:19:34Z","cross_cats_sorted":[],"title_canon_sha256":"c33b49a5b93af1b306f0db8851fe5f67441d5efd0f078701ca577f5d65e75ca7","abstract_canon_sha256":"4c6dbaadeb57b8dfdb004b12252cfba868645135017f025db3d0577c3f870a89"},"schema_version":"1.0"},"canonical_sha256":"95eacf4ee2fe41c4b80b002429b4fcb283461b7a24710549d898f077e5a20a36","source":{"kind":"arxiv","id":"1504.00956","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00956","created_at":"2026-05-18T02:19:35Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00956v1","created_at":"2026-05-18T02:19:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00956","created_at":"2026-05-18T02:19:35Z"},{"alias_kind":"pith_short_12","alias_value":"SXVM6TXC7ZA4","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SXVM6TXC7ZA4JOAL","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SXVM6TXC","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:SXVM6TXC7ZA4JOALAASCTNH4WK","target":"record","payload":{"canonical_record":{"source":{"id":"1504.00956","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-03T23:19:34Z","cross_cats_sorted":[],"title_canon_sha256":"c33b49a5b93af1b306f0db8851fe5f67441d5efd0f078701ca577f5d65e75ca7","abstract_canon_sha256":"4c6dbaadeb57b8dfdb004b12252cfba868645135017f025db3d0577c3f870a89"},"schema_version":"1.0"},"canonical_sha256":"95eacf4ee2fe41c4b80b002429b4fcb283461b7a24710549d898f077e5a20a36","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:35.476294Z","signature_b64":"UT6x8Nask7xKnwCPCROz3g+bPw7MDg48TSyL3EQvtObxFv7d+rT+1IjqO1d/MSCs3EqthN7gyq1j0fpOrL4vBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"95eacf4ee2fe41c4b80b002429b4fcb283461b7a24710549d898f077e5a20a36","last_reissued_at":"2026-05-18T02:19:35.475559Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:35.475559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.00956","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":"2026-05-18T02:19:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iX9Lok+rf2BXCw1cuIiI7j0sN7tI5Xpyj4HogQVQO9+q8SEEn6ItmJOwImjK0ayw47r3fRy65UYp4b0oCUWeDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:15:40.742411Z"},"content_sha256":"3a08980e52dfb32f25adcb03fcf237e07253ee1f7888a1d416b232b95bd50a9c","schema_version":"1.0","event_id":"sha256:3a08980e52dfb32f25adcb03fcf237e07253ee1f7888a1d416b232b95bd50a9c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:SXVM6TXC7ZA4JOALAASCTNH4WK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hydrogenation of Nd-Fe-B magnet powder under a high pressure of hydrogen","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"J. Kitagawa, M. Tsubota, T. Ono, Y. Kataoka, Y. Kawamoto","submitted_at":"2015-04-03T23:19:34Z","abstract_excerpt":"The hydrogenation of Nd2Fe14B under a high pressure of hydrogen has been investigated for the first time. At the heat-treatment temperature of 600 degree C, the almost complete decomposition of Nd2Fe14B into NdH2+x and alpha-Fe is observed, although a rather long heat-treatment time is necessary to achieve the sufficient hydrogenation. The desorption of hydrogen from NdH2+x does not occur in the furnace-cooling process."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00956","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":"2026-05-18T02:19:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W3OgjKlyvESPEuykxlGVO4iFsFlt5jq674pBxMFkGYn9FUV3f8oLbEaJhuhTuiU/+eQq5nVnQNEVzjQqVwZECw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:15:40.742764Z"},"content_sha256":"ffc4b13bf7c80466adc76a0fa18ec645b573a67f11aec52c7e69d28a02ff235f","schema_version":"1.0","event_id":"sha256:ffc4b13bf7c80466adc76a0fa18ec645b573a67f11aec52c7e69d28a02ff235f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SXVM6TXC7ZA4JOALAASCTNH4WK/bundle.json","state_url":"https://pith.science/pith/SXVM6TXC7ZA4JOALAASCTNH4WK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SXVM6TXC7ZA4JOALAASCTNH4WK/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":"2026-05-28T14:15:40Z","links":{"resolver":"https://pith.science/pith/SXVM6TXC7ZA4JOALAASCTNH4WK","bundle":"https://pith.science/pith/SXVM6TXC7ZA4JOALAASCTNH4WK/bundle.json","state":"https://pith.science/pith/SXVM6TXC7ZA4JOALAASCTNH4WK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SXVM6TXC7ZA4JOALAASCTNH4WK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:SXVM6TXC7ZA4JOALAASCTNH4WK","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":"4c6dbaadeb57b8dfdb004b12252cfba868645135017f025db3d0577c3f870a89","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-03T23:19:34Z","title_canon_sha256":"c33b49a5b93af1b306f0db8851fe5f67441d5efd0f078701ca577f5d65e75ca7"},"schema_version":"1.0","source":{"id":"1504.00956","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00956","created_at":"2026-05-18T02:19:35Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00956v1","created_at":"2026-05-18T02:19:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00956","created_at":"2026-05-18T02:19:35Z"},{"alias_kind":"pith_short_12","alias_value":"SXVM6TXC7ZA4","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"SXVM6TXC7ZA4JOAL","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"SXVM6TXC","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:ffc4b13bf7c80466adc76a0fa18ec645b573a67f11aec52c7e69d28a02ff235f","target":"graph","created_at":"2026-05-18T02:19:35Z","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 hydrogenation of Nd2Fe14B under a high pressure of hydrogen has been investigated for the first time. At the heat-treatment temperature of 600 degree C, the almost complete decomposition of Nd2Fe14B into NdH2+x and alpha-Fe is observed, although a rather long heat-treatment time is necessary to achieve the sufficient hydrogenation. The desorption of hydrogen from NdH2+x does not occur in the furnace-cooling process.","authors_text":"J. Kitagawa, M. Tsubota, T. Ono, Y. Kataoka, Y. Kawamoto","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-03T23:19:34Z","title":"Hydrogenation of Nd-Fe-B magnet powder under a high pressure of hydrogen"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00956","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":"sha256:3a08980e52dfb32f25adcb03fcf237e07253ee1f7888a1d416b232b95bd50a9c","target":"record","created_at":"2026-05-18T02:19:35Z","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":"4c6dbaadeb57b8dfdb004b12252cfba868645135017f025db3d0577c3f870a89","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-04-03T23:19:34Z","title_canon_sha256":"c33b49a5b93af1b306f0db8851fe5f67441d5efd0f078701ca577f5d65e75ca7"},"schema_version":"1.0","source":{"id":"1504.00956","kind":"arxiv","version":1}},"canonical_sha256":"95eacf4ee2fe41c4b80b002429b4fcb283461b7a24710549d898f077e5a20a36","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"95eacf4ee2fe41c4b80b002429b4fcb283461b7a24710549d898f077e5a20a36","first_computed_at":"2026-05-18T02:19:35.475559Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:35.475559Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UT6x8Nask7xKnwCPCROz3g+bPw7MDg48TSyL3EQvtObxFv7d+rT+1IjqO1d/MSCs3EqthN7gyq1j0fpOrL4vBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:35.476294Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.00956","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3a08980e52dfb32f25adcb03fcf237e07253ee1f7888a1d416b232b95bd50a9c","sha256:ffc4b13bf7c80466adc76a0fa18ec645b573a67f11aec52c7e69d28a02ff235f"],"state_sha256":"1386dd5ef6a4b4640c7167e41e1673115bd76e1a5c3208f991208dfe5134cc4c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WmunXttscylLv6VMVZEQpI/nsHMPvrmuSo0nfedUopb6bJFd1Xopzrw9640Q2DNEeijt/3iBazlNf6WlLYmlDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T14:15:40.744735Z","bundle_sha256":"8ecf3555809c6668c2fb4ae7ad8722168c05544c4ca4ea7e696a003a3038d59d"}}