{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:JEAWRARMWZVMMCFOJPQKGUE3IE","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":"2a5dd90c7b782716c636e21a88431c478ed6598e1281078c922d8589ba98f1ce","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2004-08-19T09:50:31Z","title_canon_sha256":"3760294a3db5733d51bf374bf8b7d7ef79cf375881062e8a9403898f0d4038a2"},"schema_version":"1.0","source":{"id":"cond-mat/0408426","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0408426","created_at":"2026-07-04T16:46:54Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0408426v1","created_at":"2026-07-04T16:46:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0408426","created_at":"2026-07-04T16:46:54Z"},{"alias_kind":"pith_short_12","alias_value":"JEAWRARMWZVM","created_at":"2026-07-04T16:46:54Z"},{"alias_kind":"pith_short_16","alias_value":"JEAWRARMWZVMMCFO","created_at":"2026-07-04T16:46:54Z"},{"alias_kind":"pith_short_8","alias_value":"JEAWRARM","created_at":"2026-07-04T16:46:54Z"}],"graph_snapshots":[{"event_id":"sha256:6746262d3199dccca39551e0c3d5aa72f24a95f097fe78e68aff96981baf0a17","target":"graph","created_at":"2026-07-04T16:46:54Z","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/cond-mat/0408426/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We synthesized powder samples of Na$_{x}$CoO$_{2}\\cdot y$H$_{2}$O changing the volume of the water in the hydration process, then investigated their superconducting properties,. It was proved that the volume of water is one of key parameters to obtain a single phase of Na$_{x}$CoO$_{2}\\cdot y$H$_{2}$O with good superconducting properties. The transition temperature, $T_{c}$, of the sample changed gradually while it was stored in the atmosphere of 70% humidity. Superconducting behavior under high magnetic field was very sensitive to $T_{c}$. $H_{c2}$ of a high quality sample with high $T_{c}$ s","authors_text":"E. Takayama-Muromachi, H. Sakurai, K. Takada, T. Sasaki","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2004-08-19T09:50:31Z","title":"Unconventional superconductivity in NaxCoO2 yH2O"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0408426","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":"sha256:28a22a493482b0ccddebff3afddbe6c570fe654d7ac1a8001769912c0fb3eebb","target":"record","created_at":"2026-07-04T16:46:54Z","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":"2a5dd90c7b782716c636e21a88431c478ed6598e1281078c922d8589ba98f1ce","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2004-08-19T09:50:31Z","title_canon_sha256":"3760294a3db5733d51bf374bf8b7d7ef79cf375881062e8a9403898f0d4038a2"},"schema_version":"1.0","source":{"id":"cond-mat/0408426","kind":"arxiv","version":1}},"canonical_sha256":"490168822cb66ac608ae4be0a3509b41380d0efc893d128044570958b8563b4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"490168822cb66ac608ae4be0a3509b41380d0efc893d128044570958b8563b4a","first_computed_at":"2026-07-04T16:46:54.963432Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:46:54.963432Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mm/Trt1D0n3/IybwM/tVVaeyT9rImSIChIJD3bO8L04zeWbtlKfvm3b9wtM7XdlvyWNhFlsEv8UarV5H1brYCw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:46:54.963831Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0408426","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:28a22a493482b0ccddebff3afddbe6c570fe654d7ac1a8001769912c0fb3eebb","sha256:6746262d3199dccca39551e0c3d5aa72f24a95f097fe78e68aff96981baf0a17"],"state_sha256":"077f0468c62de7406e4398e87f55a2c321c9270e3198bb76ea27828128bad035"}