{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:U44QKBGI63P5VCGC6J6OMTZAQN","short_pith_number":"pith:U44QKBGI","canonical_record":{"source":{"id":"cond-mat/0308319","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-08-15T21:02:55Z","cross_cats_sorted":[],"title_canon_sha256":"8681536e15cf3609942b561db6e1aaf22347a5f4c82b5c8993754fc4bcbfc427","abstract_canon_sha256":"3174f568ccd9638f115e296d55f15f3c6aaf0be8fcdb47f4a7fb7e8879ead7d4"},"schema_version":"1.0"},"canonical_sha256":"a7390504c8f6dfda88c2f27ce64f20836b93db1c88145c001c4ba16142b0c1de","source":{"kind":"arxiv","id":"cond-mat/0308319","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0308319","created_at":"2026-05-18T04:00:38Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0308319v1","created_at":"2026-05-18T04:00:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0308319","created_at":"2026-05-18T04:00:38Z"},{"alias_kind":"pith_short_12","alias_value":"U44QKBGI63P5","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"U44QKBGI63P5VCGC","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"U44QKBGI","created_at":"2026-05-18T12:25:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:U44QKBGI63P5VCGC6J6OMTZAQN","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0308319","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-08-15T21:02:55Z","cross_cats_sorted":[],"title_canon_sha256":"8681536e15cf3609942b561db6e1aaf22347a5f4c82b5c8993754fc4bcbfc427","abstract_canon_sha256":"3174f568ccd9638f115e296d55f15f3c6aaf0be8fcdb47f4a7fb7e8879ead7d4"},"schema_version":"1.0"},"canonical_sha256":"a7390504c8f6dfda88c2f27ce64f20836b93db1c88145c001c4ba16142b0c1de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:00:38.324041Z","signature_b64":"2CdVvkQRz2L5QjibfdPCFuQ0bEX5K0FgEGc6/kjnqBxp3iq8C/UC5xRlzu+R/6JlQVwoX3XRAhnkNhHOQg+wCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a7390504c8f6dfda88c2f27ce64f20836b93db1c88145c001c4ba16142b0c1de","last_reissued_at":"2026-05-18T04:00:38.323418Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:00:38.323418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0308319","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":"2026-05-18T04:00:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kDauEEzCPn3s/jj6NgZMTPCOI9da9Kq34mG8h5DPeTj5BYc8OLN91IQcmjUbMNB6yyQFy/Cjq1xf6iyzSdW7DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:00:13.985961Z"},"content_sha256":"db36ef67019482bdda6c31cd81f857f035457e0844e8aacdb04af41d00add7ce","schema_version":"1.0","event_id":"sha256:db36ef67019482bdda6c31cd81f857f035457e0844e8aacdb04af41d00add7ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:U44QKBGI63P5VCGC6J6OMTZAQN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. E. Koshelev, A. Rydh, B. Kang, C. Marcenat, G. W. Crabtree, H.-S. Lee, K. H. Kim, K. H. P. Kim, L. Lyard, R. Brusetti, S.-I. Lee, T. Klein, U. Welp, W. K. Kwok","submitted_at":"2003-08-15T21:02:55Z","abstract_excerpt":"The angular dependence of the upper critical field Hc2 of MgB2 single crystals is studied at various temperatures by means of specific heat and transport measurements in magnetic fields up to 17 T. Clear deviations from Ginzburg-Landau behavior are observed at all temperatures and are explained by two-band effects. The angular- and temperature dependence of the deviations are in qualitative agreement with theoretical predictions based on band-structure calculations. Quantitative agreement is obtained with an interband coupling slightly stronger than the calculated, enabling band-structure anis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0308319","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":"2026-05-18T04:00:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UgTh7Yt0LtYcpa5nKIIs7FKABsgBolbsfLOVWKjL8IYOE9ZIAMtwBB7x6g4rAtuggb87vEhlilgZ24eIRk/kAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:00:13.986644Z"},"content_sha256":"d6fc8f83c95510993feb448a9cfeb531ad31770a755089a4fc94d94f5e43b5bf","schema_version":"1.0","event_id":"sha256:d6fc8f83c95510993feb448a9cfeb531ad31770a755089a4fc94d94f5e43b5bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U44QKBGI63P5VCGC6J6OMTZAQN/bundle.json","state_url":"https://pith.science/pith/U44QKBGI63P5VCGC6J6OMTZAQN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U44QKBGI63P5VCGC6J6OMTZAQN/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":"2026-05-28T23:00:13Z","links":{"resolver":"https://pith.science/pith/U44QKBGI63P5VCGC6J6OMTZAQN","bundle":"https://pith.science/pith/U44QKBGI63P5VCGC6J6OMTZAQN/bundle.json","state":"https://pith.science/pith/U44QKBGI63P5VCGC6J6OMTZAQN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U44QKBGI63P5VCGC6J6OMTZAQN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:U44QKBGI63P5VCGC6J6OMTZAQN","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":"3174f568ccd9638f115e296d55f15f3c6aaf0be8fcdb47f4a7fb7e8879ead7d4","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-08-15T21:02:55Z","title_canon_sha256":"8681536e15cf3609942b561db6e1aaf22347a5f4c82b5c8993754fc4bcbfc427"},"schema_version":"1.0","source":{"id":"cond-mat/0308319","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0308319","created_at":"2026-05-18T04:00:38Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0308319v1","created_at":"2026-05-18T04:00:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0308319","created_at":"2026-05-18T04:00:38Z"},{"alias_kind":"pith_short_12","alias_value":"U44QKBGI63P5","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"U44QKBGI63P5VCGC","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"U44QKBGI","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:d6fc8f83c95510993feb448a9cfeb531ad31770a755089a4fc94d94f5e43b5bf","target":"graph","created_at":"2026-05-18T04:00:38Z","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 angular dependence of the upper critical field Hc2 of MgB2 single crystals is studied at various temperatures by means of specific heat and transport measurements in magnetic fields up to 17 T. Clear deviations from Ginzburg-Landau behavior are observed at all temperatures and are explained by two-band effects. The angular- and temperature dependence of the deviations are in qualitative agreement with theoretical predictions based on band-structure calculations. Quantitative agreement is obtained with an interband coupling slightly stronger than the calculated, enabling band-structure anis","authors_text":"A. E. Koshelev, A. Rydh, B. Kang, C. Marcenat, G. W. Crabtree, H.-S. Lee, K. H. Kim, K. H. P. Kim, L. Lyard, R. Brusetti, S.-I. Lee, T. Klein, U. Welp, W. K. Kwok","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-08-15T21:02:55Z","title":"Two-band Effects in the Angular Dependence of Hc2 of MgB2 Single Crystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0308319","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:db36ef67019482bdda6c31cd81f857f035457e0844e8aacdb04af41d00add7ce","target":"record","created_at":"2026-05-18T04:00:38Z","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":"3174f568ccd9638f115e296d55f15f3c6aaf0be8fcdb47f4a7fb7e8879ead7d4","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2003-08-15T21:02:55Z","title_canon_sha256":"8681536e15cf3609942b561db6e1aaf22347a5f4c82b5c8993754fc4bcbfc427"},"schema_version":"1.0","source":{"id":"cond-mat/0308319","kind":"arxiv","version":1}},"canonical_sha256":"a7390504c8f6dfda88c2f27ce64f20836b93db1c88145c001c4ba16142b0c1de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a7390504c8f6dfda88c2f27ce64f20836b93db1c88145c001c4ba16142b0c1de","first_computed_at":"2026-05-18T04:00:38.323418Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:38.323418Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2CdVvkQRz2L5QjibfdPCFuQ0bEX5K0FgEGc6/kjnqBxp3iq8C/UC5xRlzu+R/6JlQVwoX3XRAhnkNhHOQg+wCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:38.324041Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0308319","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db36ef67019482bdda6c31cd81f857f035457e0844e8aacdb04af41d00add7ce","sha256:d6fc8f83c95510993feb448a9cfeb531ad31770a755089a4fc94d94f5e43b5bf"],"state_sha256":"a60d558750406fb3e1560511e94c205423313e6bc42d5a43e7d02b9cc4a4bf01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M49A1sc1ElbZAs9OCOIPe3EsAuxqnNinkERdsjM8aoEBelFJnY52gbdy0uxAMncIjkMxTmIqI9wBzwe63qYYBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T23:00:13.989953Z","bundle_sha256":"e2f0e5434ebd2fd1c9e95789fc13342180a27305f459bab4ffed9847886aafb4"}}