{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:WUAROWFBHBYGHN3ZHGHJZAM55V","short_pith_number":"pith:WUAROWFB","canonical_record":{"source":{"id":"2211.10476","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2022-11-18T19:26:30Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"ef83640e4d99443ae2ac4b7ff2a50f5765cde3f86c33e716f574cfcde12e39d1","abstract_canon_sha256":"0755534aec96f9f53ff8e9d9ada145957f437200c66093969ad6288e8fd17fd2"},"schema_version":"1.0"},"canonical_sha256":"b5011758a1387063b779398e9c819ded597ae7e2fe0f917888d5ce0929a22880","source":{"kind":"arxiv","id":"2211.10476","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.10476","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"arxiv_version","alias_value":"2211.10476v1","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.10476","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"pith_short_12","alias_value":"WUAROWFBHBYG","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"pith_short_16","alias_value":"WUAROWFBHBYGHN3Z","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"pith_short_8","alias_value":"WUAROWFB","created_at":"2026-07-05T05:17:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:WUAROWFBHBYGHN3ZHGHJZAM55V","target":"record","payload":{"canonical_record":{"source":{"id":"2211.10476","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2022-11-18T19:26:30Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"ef83640e4d99443ae2ac4b7ff2a50f5765cde3f86c33e716f574cfcde12e39d1","abstract_canon_sha256":"0755534aec96f9f53ff8e9d9ada145957f437200c66093969ad6288e8fd17fd2"},"schema_version":"1.0"},"canonical_sha256":"b5011758a1387063b779398e9c819ded597ae7e2fe0f917888d5ce0929a22880","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:17:30.941746Z","signature_b64":"Y2rZ/YHRrbuXhQICtNsdtZf6UyF9/5XG5Nuy86BYgJXV1nDyrvvudrLSmFow481mL/Nky49G/Db//Ko42ZXSBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b5011758a1387063b779398e9c819ded597ae7e2fe0f917888d5ce0929a22880","last_reissued_at":"2026-07-05T05:17:30.940972Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:17:30.940972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2211.10476","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":"2026-07-05T05:17:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YiwkMgf+2IRVwpdWNDxOdxbtsOouXqLhC+2W4jx396aSSC7l8NSbs4rP51M0d/rw0PmIG9Nbs2AkXERcMdyaBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T17:50:21.552954Z"},"content_sha256":"a19131b903e24f7136dd799d34e2f1580c3f4bebbf0593f3e7e3a70ee39cb0cf","schema_version":"1.0","event_id":"sha256:a19131b903e24f7136dd799d34e2f1580c3f4bebbf0593f3e7e3a70ee39cb0cf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:WUAROWFBHBYGHN3ZHGHJZAM55V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"System architecture of a four-wheel drive Formula Student vehicle","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Adriano Schommer, Chris Johnston, Denise Morrey, Gordana Collier, Ludmila Nesi Maria, Robert Norris","submitted_at":"2022-11-18T19:26:30Z","abstract_excerpt":"Formula Student vehicles are becoming increasingly complex, especially with the current shift from internal combustion engines toward electric powertrains. The interaction between software and hardware is complex and imposes additional challenges for systems integration. This paper provides a structured introduction to the OBR22 Oxford Brookes Racing Formula Student electric vehicle. From a system architecture perspective, the four-wheel drive in-hub motors topology is described. Diagrams of the hardware components, the architecture of the high voltage and communication systems are presented. "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.10476","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2211.10476/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:17:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0f5Pg6fDyI+NRtUMf5dxYr/qqXs1oQ6jLVMoNK0gEYHe+j9SXM77gQIgQQmaepgvP0oaHhYhrWQBTVb8Nr3vAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-13T17:50:21.553649Z"},"content_sha256":"530607141f3797a6bce28dbd08d341f8a9ade7cd1466a7ee60bd678fa10c4569","schema_version":"1.0","event_id":"sha256:530607141f3797a6bce28dbd08d341f8a9ade7cd1466a7ee60bd678fa10c4569"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WUAROWFBHBYGHN3ZHGHJZAM55V/bundle.json","state_url":"https://pith.science/pith/WUAROWFBHBYGHN3ZHGHJZAM55V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WUAROWFBHBYGHN3ZHGHJZAM55V/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":"2026-08-13T17:50:21Z","links":{"resolver":"https://pith.science/pith/WUAROWFBHBYGHN3ZHGHJZAM55V","bundle":"https://pith.science/pith/WUAROWFBHBYGHN3ZHGHJZAM55V/bundle.json","state":"https://pith.science/pith/WUAROWFBHBYGHN3ZHGHJZAM55V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WUAROWFBHBYGHN3ZHGHJZAM55V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:WUAROWFBHBYGHN3ZHGHJZAM55V","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":"0755534aec96f9f53ff8e9d9ada145957f437200c66093969ad6288e8fd17fd2","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2022-11-18T19:26:30Z","title_canon_sha256":"ef83640e4d99443ae2ac4b7ff2a50f5765cde3f86c33e716f574cfcde12e39d1"},"schema_version":"1.0","source":{"id":"2211.10476","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2211.10476","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"arxiv_version","alias_value":"2211.10476v1","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2211.10476","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"pith_short_12","alias_value":"WUAROWFBHBYG","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"pith_short_16","alias_value":"WUAROWFBHBYGHN3Z","created_at":"2026-07-05T05:17:30Z"},{"alias_kind":"pith_short_8","alias_value":"WUAROWFB","created_at":"2026-07-05T05:17:30Z"}],"graph_snapshots":[{"event_id":"sha256:530607141f3797a6bce28dbd08d341f8a9ade7cd1466a7ee60bd678fa10c4569","target":"graph","created_at":"2026-07-05T05:17:30Z","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/2211.10476/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Formula Student vehicles are becoming increasingly complex, especially with the current shift from internal combustion engines toward electric powertrains. The interaction between software and hardware is complex and imposes additional challenges for systems integration. This paper provides a structured introduction to the OBR22 Oxford Brookes Racing Formula Student electric vehicle. From a system architecture perspective, the four-wheel drive in-hub motors topology is described. Diagrams of the hardware components, the architecture of the high voltage and communication systems are presented. ","authors_text":"Adriano Schommer, Chris Johnston, Denise Morrey, Gordana Collier, Ludmila Nesi Maria, Robert Norris","cross_cats":["cs.SY"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2022-11-18T19:26:30Z","title":"System architecture of a four-wheel drive Formula Student vehicle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2211.10476","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:a19131b903e24f7136dd799d34e2f1580c3f4bebbf0593f3e7e3a70ee39cb0cf","target":"record","created_at":"2026-07-05T05:17:30Z","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":"0755534aec96f9f53ff8e9d9ada145957f437200c66093969ad6288e8fd17fd2","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.SY","submitted_at":"2022-11-18T19:26:30Z","title_canon_sha256":"ef83640e4d99443ae2ac4b7ff2a50f5765cde3f86c33e716f574cfcde12e39d1"},"schema_version":"1.0","source":{"id":"2211.10476","kind":"arxiv","version":1}},"canonical_sha256":"b5011758a1387063b779398e9c819ded597ae7e2fe0f917888d5ce0929a22880","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b5011758a1387063b779398e9c819ded597ae7e2fe0f917888d5ce0929a22880","first_computed_at":"2026-07-05T05:17:30.940972Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:17:30.940972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y2rZ/YHRrbuXhQICtNsdtZf6UyF9/5XG5Nuy86BYgJXV1nDyrvvudrLSmFow481mL/Nky49G/Db//Ko42ZXSBg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:17:30.941746Z","signed_message":"canonical_sha256_bytes"},"source_id":"2211.10476","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a19131b903e24f7136dd799d34e2f1580c3f4bebbf0593f3e7e3a70ee39cb0cf","sha256:530607141f3797a6bce28dbd08d341f8a9ade7cd1466a7ee60bd678fa10c4569"],"state_sha256":"d255880cb6b2d1be9699eefaa53553e7149ac418a85da6106720c74b8797423f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ku4TFCfvunURaA2rDrA+tTqb7p+UJxv5a1GcVsY+ldL2qulfxWU0PRnAoDR+C3nEg43H30NMNE6HCPqH2EDiCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-13T17:50:21.563585Z","bundle_sha256":"b6243e6fa1a31753d16aaff180d7dd5086c46bc0e15119360c554566d3eecb7e"}}