{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:EMDGCZRZQ7KF7WH64DGNQPC27Y","short_pith_number":"pith:EMDGCZRZ","canonical_record":{"source":{"id":"1409.8202","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-29T17:24:29Z","cross_cats_sorted":["stat.AP"],"title_canon_sha256":"bb0c2528fd887764bbb0b55afa4d0d216c6016d19b211e956ab548b7157e6fbe","abstract_canon_sha256":"99396a1dd4e9080f7b7a122d478a6d1501105d417a32cd7861d7ee81b9e6e3b7"},"schema_version":"1.0"},"canonical_sha256":"230661663987d45fd8fee0ccd83c5afe29895cf3e52c3d0e7453fecb077ee8e7","source":{"kind":"arxiv","id":"1409.8202","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.8202","created_at":"2026-05-18T02:41:33Z"},{"alias_kind":"arxiv_version","alias_value":"1409.8202v1","created_at":"2026-05-18T02:41:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.8202","created_at":"2026-05-18T02:41:33Z"},{"alias_kind":"pith_short_12","alias_value":"EMDGCZRZQ7KF","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EMDGCZRZQ7KF7WH6","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EMDGCZRZ","created_at":"2026-05-18T12:28:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:EMDGCZRZQ7KF7WH64DGNQPC27Y","target":"record","payload":{"canonical_record":{"source":{"id":"1409.8202","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-29T17:24:29Z","cross_cats_sorted":["stat.AP"],"title_canon_sha256":"bb0c2528fd887764bbb0b55afa4d0d216c6016d19b211e956ab548b7157e6fbe","abstract_canon_sha256":"99396a1dd4e9080f7b7a122d478a6d1501105d417a32cd7861d7ee81b9e6e3b7"},"schema_version":"1.0"},"canonical_sha256":"230661663987d45fd8fee0ccd83c5afe29895cf3e52c3d0e7453fecb077ee8e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:41:33.564860Z","signature_b64":"la+vvqxHD/n5VPtlDcyV2dIMq3jSJlNV56W3BlmyDVCOBHaFMAsl+MF44YE5vD/NuSZrVtU/BRumhuXzA8ZQBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"230661663987d45fd8fee0ccd83c5afe29895cf3e52c3d0e7453fecb077ee8e7","last_reissued_at":"2026-05-18T02:41:33.564516Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:41:33.564516Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.8202","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":"2026-05-18T02:41:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v61SfpW1yt6QvJxyWPh9lkiaUtPsP6dciapV+rMRO33OauPF6ecOdi7LoN5KVG4ZGsUZY1IXg7fTNuL8dw9bAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:58:47.760873Z"},"content_sha256":"1b8a8547c5b929429e4272f2c215bd72a37a040b1fdbdcfd372099a749f73db2","schema_version":"1.0","event_id":"sha256:1b8a8547c5b929429e4272f2c215bd72a37a040b1fdbdcfd372099a749f73db2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:EMDGCZRZQ7KF7WH64DGNQPC27Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Short-Term Predictability of Photovoltaic Production over Italy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["stat.AP"],"primary_cat":"cs.LG","authors_text":"Marcello Petitta, Matteo De Felice, Paolo M. Ruti","submitted_at":"2014-09-29T17:24:29Z","abstract_excerpt":"Photovoltaic (PV) power production increased drastically in Europe throughout the last years. About the 6% of electricity in Italy comes from PV and for an efficient management of the power grid an accurate and reliable forecasting of production would be needed. Starting from a dataset of electricity production of 65 Italian solar plants for the years 2011-2012 we investigate the possibility to forecast daily production from one to ten days of lead time without using on site measurements. Our study is divided in two parts: an assessment of the predictability of meteorological variables using w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.8202","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":"2026-05-18T02:41:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rNq4w2HWxJwz+ZOMmNrsErRtmOmpsYguuCfq66+wiHfwxw8cy+XoOKtrhwdfQMRm8x7YkF03mloj4TxytqnNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T04:58:47.761545Z"},"content_sha256":"0cdec0ad6915e5f869cbeface945920beb84652fdd7346004bd2f3c2c2ef361f","schema_version":"1.0","event_id":"sha256:0cdec0ad6915e5f869cbeface945920beb84652fdd7346004bd2f3c2c2ef361f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EMDGCZRZQ7KF7WH64DGNQPC27Y/bundle.json","state_url":"https://pith.science/pith/EMDGCZRZQ7KF7WH64DGNQPC27Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EMDGCZRZQ7KF7WH64DGNQPC27Y/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":"2026-06-07T04:58:47Z","links":{"resolver":"https://pith.science/pith/EMDGCZRZQ7KF7WH64DGNQPC27Y","bundle":"https://pith.science/pith/EMDGCZRZQ7KF7WH64DGNQPC27Y/bundle.json","state":"https://pith.science/pith/EMDGCZRZQ7KF7WH64DGNQPC27Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EMDGCZRZQ7KF7WH64DGNQPC27Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:EMDGCZRZQ7KF7WH64DGNQPC27Y","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":"99396a1dd4e9080f7b7a122d478a6d1501105d417a32cd7861d7ee81b9e6e3b7","cross_cats_sorted":["stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-29T17:24:29Z","title_canon_sha256":"bb0c2528fd887764bbb0b55afa4d0d216c6016d19b211e956ab548b7157e6fbe"},"schema_version":"1.0","source":{"id":"1409.8202","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.8202","created_at":"2026-05-18T02:41:33Z"},{"alias_kind":"arxiv_version","alias_value":"1409.8202v1","created_at":"2026-05-18T02:41:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.8202","created_at":"2026-05-18T02:41:33Z"},{"alias_kind":"pith_short_12","alias_value":"EMDGCZRZQ7KF","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_16","alias_value":"EMDGCZRZQ7KF7WH6","created_at":"2026-05-18T12:28:28Z"},{"alias_kind":"pith_short_8","alias_value":"EMDGCZRZ","created_at":"2026-05-18T12:28:28Z"}],"graph_snapshots":[{"event_id":"sha256:0cdec0ad6915e5f869cbeface945920beb84652fdd7346004bd2f3c2c2ef361f","target":"graph","created_at":"2026-05-18T02:41:33Z","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":"Photovoltaic (PV) power production increased drastically in Europe throughout the last years. About the 6% of electricity in Italy comes from PV and for an efficient management of the power grid an accurate and reliable forecasting of production would be needed. Starting from a dataset of electricity production of 65 Italian solar plants for the years 2011-2012 we investigate the possibility to forecast daily production from one to ten days of lead time without using on site measurements. Our study is divided in two parts: an assessment of the predictability of meteorological variables using w","authors_text":"Marcello Petitta, Matteo De Felice, Paolo M. Ruti","cross_cats":["stat.AP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-29T17:24:29Z","title":"Short-Term Predictability of Photovoltaic Production over Italy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.8202","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":"sha256:1b8a8547c5b929429e4272f2c215bd72a37a040b1fdbdcfd372099a749f73db2","target":"record","created_at":"2026-05-18T02:41:33Z","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":"99396a1dd4e9080f7b7a122d478a6d1501105d417a32cd7861d7ee81b9e6e3b7","cross_cats_sorted":["stat.AP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2014-09-29T17:24:29Z","title_canon_sha256":"bb0c2528fd887764bbb0b55afa4d0d216c6016d19b211e956ab548b7157e6fbe"},"schema_version":"1.0","source":{"id":"1409.8202","kind":"arxiv","version":1}},"canonical_sha256":"230661663987d45fd8fee0ccd83c5afe29895cf3e52c3d0e7453fecb077ee8e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"230661663987d45fd8fee0ccd83c5afe29895cf3e52c3d0e7453fecb077ee8e7","first_computed_at":"2026-05-18T02:41:33.564516Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:41:33.564516Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"la+vvqxHD/n5VPtlDcyV2dIMq3jSJlNV56W3BlmyDVCOBHaFMAsl+MF44YE5vD/NuSZrVtU/BRumhuXzA8ZQBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:41:33.564860Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.8202","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b8a8547c5b929429e4272f2c215bd72a37a040b1fdbdcfd372099a749f73db2","sha256:0cdec0ad6915e5f869cbeface945920beb84652fdd7346004bd2f3c2c2ef361f"],"state_sha256":"2261acfb6e82c18283b05afd0b9a75751f7cbce0b15fc87e5d91499ec3a12e14"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vdVOj7SC7pOaWWLV9xNDMGZtZhrWItJ2V4KRENQBGQ1p6IxMsUJRsfbacqvWgepRbpX46xJlyyp7OkP8q6f3BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T04:58:47.764903Z","bundle_sha256":"e6a2aed662269564ba0910533fb8bfe11306ef88c978293196f273189018dc41"}}