{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:T4PDFALK5DKXKF5DYNBUH5AH7W","short_pith_number":"pith:T4PDFALK","canonical_record":{"source":{"id":"1509.01855","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-06T21:13:05Z","cross_cats_sorted":[],"title_canon_sha256":"5952e434d28f1a6a4557e2dde8488eedf1721f95ab711f21e2269e8e5d856794","abstract_canon_sha256":"dd98a29e17a963ef936d2faa4616a18ae6faa33ce616c3d66f4aa877160bb9f9"},"schema_version":"1.0"},"canonical_sha256":"9f1e32816ae8d57517a3c34343f407fdb9dc081cc03aa023e83d35ad58c39372","source":{"kind":"arxiv","id":"1509.01855","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.01855","created_at":"2026-05-18T01:20:45Z"},{"alias_kind":"arxiv_version","alias_value":"1509.01855v1","created_at":"2026-05-18T01:20:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.01855","created_at":"2026-05-18T01:20:45Z"},{"alias_kind":"pith_short_12","alias_value":"T4PDFALK5DKX","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"T4PDFALK5DKXKF5D","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"T4PDFALK","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:T4PDFALK5DKXKF5DYNBUH5AH7W","target":"record","payload":{"canonical_record":{"source":{"id":"1509.01855","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-06T21:13:05Z","cross_cats_sorted":[],"title_canon_sha256":"5952e434d28f1a6a4557e2dde8488eedf1721f95ab711f21e2269e8e5d856794","abstract_canon_sha256":"dd98a29e17a963ef936d2faa4616a18ae6faa33ce616c3d66f4aa877160bb9f9"},"schema_version":"1.0"},"canonical_sha256":"9f1e32816ae8d57517a3c34343f407fdb9dc081cc03aa023e83d35ad58c39372","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:45.048344Z","signature_b64":"ZxncsxGaMymRlS/MvddYciLolM5vCRNxItJT59ATtSDvIw0SvpToi05Gqlg0b0fjT1ALzqYK/PjFwFR0/I9/Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f1e32816ae8d57517a3c34343f407fdb9dc081cc03aa023e83d35ad58c39372","last_reissued_at":"2026-05-18T01:20:45.047640Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:45.047640Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.01855","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":"2026-05-18T01:20:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s34oLho2ONOuYfrGZfxya8XO710cmCAQgjki+5hEpjlb+E8cR4grFFXxzh1JqLbDT5tweXLc8MNc98U4FcdZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:07:15.955979Z"},"content_sha256":"14c1584bddf6adb06e5bdeb1064ec94c6cd8a1ff69d78b73082e3a3d1a21751a","schema_version":"1.0","event_id":"sha256:14c1584bddf6adb06e5bdeb1064ec94c6cd8a1ff69d78b73082e3a3d1a21751a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:T4PDFALK5DKXKF5DYNBUH5AH7W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimation of hysteretic losses for MgB2 tapes under the operating conditions of a generator","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Carlos Roberto Vargas-Llanos, Francesco Grilli, Frederic Trillaud, V\\'ictor Manuel Rodr\\'iguez Zerme\\~no","submitted_at":"2015-09-06T21:13:05Z","abstract_excerpt":"Hysteretic losses in MgB2 wound superconducting coils of a 500 kW synchronous hybrid generator were estimated as part of the European project SUPRAPOWER led by the Spanish company Tecnalia Research and Innovation. Particular interest was given to the losses found in tapes in the superconducting rotor caused by the magnetic flux ripples originating from the conventional stator during nominal operation. To compute the losses, a 2D Finite Element Method was applied to solve the H-formulation of Maxwell's equations considering the nonlinear properties of both the superconducting material and its s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.01855","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":"2026-05-18T01:20:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8RB2YZhhkv3iVh239N6dP73EVxQrqhyu90uUD6t3GuvqSrOzdXZ75BINeqcSXETCATL5x61zkAhwRA6hgBRYCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:07:15.956371Z"},"content_sha256":"629521786d9b36abb2d1a79977e03d11b4aff509cf4e051c51b45241fe650bee","schema_version":"1.0","event_id":"sha256:629521786d9b36abb2d1a79977e03d11b4aff509cf4e051c51b45241fe650bee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T4PDFALK5DKXKF5DYNBUH5AH7W/bundle.json","state_url":"https://pith.science/pith/T4PDFALK5DKXKF5DYNBUH5AH7W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T4PDFALK5DKXKF5DYNBUH5AH7W/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":"2026-05-30T13:07:15Z","links":{"resolver":"https://pith.science/pith/T4PDFALK5DKXKF5DYNBUH5AH7W","bundle":"https://pith.science/pith/T4PDFALK5DKXKF5DYNBUH5AH7W/bundle.json","state":"https://pith.science/pith/T4PDFALK5DKXKF5DYNBUH5AH7W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T4PDFALK5DKXKF5DYNBUH5AH7W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:T4PDFALK5DKXKF5DYNBUH5AH7W","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":"dd98a29e17a963ef936d2faa4616a18ae6faa33ce616c3d66f4aa877160bb9f9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-06T21:13:05Z","title_canon_sha256":"5952e434d28f1a6a4557e2dde8488eedf1721f95ab711f21e2269e8e5d856794"},"schema_version":"1.0","source":{"id":"1509.01855","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.01855","created_at":"2026-05-18T01:20:45Z"},{"alias_kind":"arxiv_version","alias_value":"1509.01855v1","created_at":"2026-05-18T01:20:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.01855","created_at":"2026-05-18T01:20:45Z"},{"alias_kind":"pith_short_12","alias_value":"T4PDFALK5DKX","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"T4PDFALK5DKXKF5D","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"T4PDFALK","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:629521786d9b36abb2d1a79977e03d11b4aff509cf4e051c51b45241fe650bee","target":"graph","created_at":"2026-05-18T01:20:45Z","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":"Hysteretic losses in MgB2 wound superconducting coils of a 500 kW synchronous hybrid generator were estimated as part of the European project SUPRAPOWER led by the Spanish company Tecnalia Research and Innovation. Particular interest was given to the losses found in tapes in the superconducting rotor caused by the magnetic flux ripples originating from the conventional stator during nominal operation. To compute the losses, a 2D Finite Element Method was applied to solve the H-formulation of Maxwell's equations considering the nonlinear properties of both the superconducting material and its s","authors_text":"Carlos Roberto Vargas-Llanos, Francesco Grilli, Frederic Trillaud, V\\'ictor Manuel Rodr\\'iguez Zerme\\~no","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-06T21:13:05Z","title":"Estimation of hysteretic losses for MgB2 tapes under the operating conditions of a generator"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.01855","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":"sha256:14c1584bddf6adb06e5bdeb1064ec94c6cd8a1ff69d78b73082e3a3d1a21751a","target":"record","created_at":"2026-05-18T01:20:45Z","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":"dd98a29e17a963ef936d2faa4616a18ae6faa33ce616c3d66f4aa877160bb9f9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-09-06T21:13:05Z","title_canon_sha256":"5952e434d28f1a6a4557e2dde8488eedf1721f95ab711f21e2269e8e5d856794"},"schema_version":"1.0","source":{"id":"1509.01855","kind":"arxiv","version":1}},"canonical_sha256":"9f1e32816ae8d57517a3c34343f407fdb9dc081cc03aa023e83d35ad58c39372","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f1e32816ae8d57517a3c34343f407fdb9dc081cc03aa023e83d35ad58c39372","first_computed_at":"2026-05-18T01:20:45.047640Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:45.047640Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZxncsxGaMymRlS/MvddYciLolM5vCRNxItJT59ATtSDvIw0SvpToi05Gqlg0b0fjT1ALzqYK/PjFwFR0/I9/Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:45.048344Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.01855","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14c1584bddf6adb06e5bdeb1064ec94c6cd8a1ff69d78b73082e3a3d1a21751a","sha256:629521786d9b36abb2d1a79977e03d11b4aff509cf4e051c51b45241fe650bee"],"state_sha256":"7eb1ab72e6eb9b1860dc5e6b70b655534265b2b05002db5ca315830107e608b4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KVfnAkUgwr4sG0qJbsoD+1ezirGSKYo2brGrDqj+S/B0hFdphznYcpoqLtt0Xe5+zT1CEhudzW47tmzkGo6nDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T13:07:15.958863Z","bundle_sha256":"4788d871103a83cb1146f7e612c070c373365eb6fd8648e996badd66dcd90801"}}