{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:M2QTOX3G7KHOULOSIFNXPPFP5O","short_pith_number":"pith:M2QTOX3G","canonical_record":{"source":{"id":"1809.07829","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-09-20T19:55:48Z","cross_cats_sorted":[],"title_canon_sha256":"b355938e1cf9e4164a497c959d4a5e21bbc7d03c707a6fc6693b1e9e1de4533b","abstract_canon_sha256":"0c1fd07f52b2d1bc94bac3f0ea36ca494d38137aa663fb884205bb1cf4a05692"},"schema_version":"1.0"},"canonical_sha256":"66a1375f66fa8eea2dd2415b77bcafeb8292011e9d498c9149e138ecf7f4f9f6","source":{"kind":"arxiv","id":"1809.07829","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.07829","created_at":"2026-05-18T00:05:11Z"},{"alias_kind":"arxiv_version","alias_value":"1809.07829v1","created_at":"2026-05-18T00:05:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.07829","created_at":"2026-05-18T00:05:11Z"},{"alias_kind":"pith_short_12","alias_value":"M2QTOX3G7KHO","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M2QTOX3G7KHOULOS","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M2QTOX3G","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:M2QTOX3G7KHOULOSIFNXPPFP5O","target":"record","payload":{"canonical_record":{"source":{"id":"1809.07829","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-09-20T19:55:48Z","cross_cats_sorted":[],"title_canon_sha256":"b355938e1cf9e4164a497c959d4a5e21bbc7d03c707a6fc6693b1e9e1de4533b","abstract_canon_sha256":"0c1fd07f52b2d1bc94bac3f0ea36ca494d38137aa663fb884205bb1cf4a05692"},"schema_version":"1.0"},"canonical_sha256":"66a1375f66fa8eea2dd2415b77bcafeb8292011e9d498c9149e138ecf7f4f9f6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:05:11.214409Z","signature_b64":"SYRcLZiiTBH/kK4K73mdHJWNA7ZHJtHxnRkcHqmXyrUVpxrX23Agjhsvh5NpjDCf/8JZ9zt+ue6hQA7iuFipCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"66a1375f66fa8eea2dd2415b77bcafeb8292011e9d498c9149e138ecf7f4f9f6","last_reissued_at":"2026-05-18T00:05:11.213777Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:05:11.213777Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1809.07829","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":"2026-05-18T00:05:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1tLNaE485LtUeRzVPkTAo0jBgRL2Wx8Cj8gegjrQRP7TPSvfFH9yXVBVIKytEQodYjpLGGJ697gM6CgtICvICQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:16:06.156985Z"},"content_sha256":"d7321a1440dfa5662c2bc3c4f2e89372d01a7654871f779b6488bdf83e40db4d","schema_version":"1.0","event_id":"sha256:d7321a1440dfa5662c2bc3c4f2e89372d01a7654871f779b6488bdf83e40db4d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:M2QTOX3G7KHOULOSIFNXPPFP5O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Personal Virtual Traffic Light Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.HC","authors_text":"Bruno Fernandes, Jo\\~ao Almeida, Jo\\~ao Rufino, Joaquim Ferreira, Jos\\'e Fonseca, Lu\\'is Silva, Vanessa Martins","submitted_at":"2018-09-20T19:55:48Z","abstract_excerpt":"Traffic control management at intersections, a challenging and complex field of study, aims to attain a balance between safety and efficient traffic control. Nowadays, traffic control at intersections is typically done by traffic light systems which are not optimal and exhibit several drawbacks, e.g. poor efficiency and real-time adaptability. With the advent of Intelligent Transportation Systems (ITS), vehicles are being equipped with state-of-the-art technology, enabling cooperative decision-making which will certainly overwhelm the available traffic control systems. This solution strongly p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.07829","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":"2026-05-18T00:05:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vsdL99zOdo8bc9T0l1bVvoExn8Yv1NABgVIxg92Ux3DxGVWs9X0uLqdFPcMF6w01vwx6XPr91HSYzmydQq2EBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T06:16:06.157379Z"},"content_sha256":"7b0443a4304396b43fdb5760d5b4601cddbdd418cd515763db28a6c4143d7737","schema_version":"1.0","event_id":"sha256:7b0443a4304396b43fdb5760d5b4601cddbdd418cd515763db28a6c4143d7737"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M2QTOX3G7KHOULOSIFNXPPFP5O/bundle.json","state_url":"https://pith.science/pith/M2QTOX3G7KHOULOSIFNXPPFP5O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M2QTOX3G7KHOULOSIFNXPPFP5O/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":"2026-05-30T06:16:06Z","links":{"resolver":"https://pith.science/pith/M2QTOX3G7KHOULOSIFNXPPFP5O","bundle":"https://pith.science/pith/M2QTOX3G7KHOULOSIFNXPPFP5O/bundle.json","state":"https://pith.science/pith/M2QTOX3G7KHOULOSIFNXPPFP5O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M2QTOX3G7KHOULOSIFNXPPFP5O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:M2QTOX3G7KHOULOSIFNXPPFP5O","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":"0c1fd07f52b2d1bc94bac3f0ea36ca494d38137aa663fb884205bb1cf4a05692","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-09-20T19:55:48Z","title_canon_sha256":"b355938e1cf9e4164a497c959d4a5e21bbc7d03c707a6fc6693b1e9e1de4533b"},"schema_version":"1.0","source":{"id":"1809.07829","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.07829","created_at":"2026-05-18T00:05:11Z"},{"alias_kind":"arxiv_version","alias_value":"1809.07829v1","created_at":"2026-05-18T00:05:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.07829","created_at":"2026-05-18T00:05:11Z"},{"alias_kind":"pith_short_12","alias_value":"M2QTOX3G7KHO","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"M2QTOX3G7KHOULOS","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"M2QTOX3G","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:7b0443a4304396b43fdb5760d5b4601cddbdd418cd515763db28a6c4143d7737","target":"graph","created_at":"2026-05-18T00:05:11Z","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":"Traffic control management at intersections, a challenging and complex field of study, aims to attain a balance between safety and efficient traffic control. Nowadays, traffic control at intersections is typically done by traffic light systems which are not optimal and exhibit several drawbacks, e.g. poor efficiency and real-time adaptability. With the advent of Intelligent Transportation Systems (ITS), vehicles are being equipped with state-of-the-art technology, enabling cooperative decision-making which will certainly overwhelm the available traffic control systems. This solution strongly p","authors_text":"Bruno Fernandes, Jo\\~ao Almeida, Jo\\~ao Rufino, Joaquim Ferreira, Jos\\'e Fonseca, Lu\\'is Silva, Vanessa Martins","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-09-20T19:55:48Z","title":"Personal Virtual Traffic Light Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.07829","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:d7321a1440dfa5662c2bc3c4f2e89372d01a7654871f779b6488bdf83e40db4d","target":"record","created_at":"2026-05-18T00:05:11Z","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":"0c1fd07f52b2d1bc94bac3f0ea36ca494d38137aa663fb884205bb1cf4a05692","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-09-20T19:55:48Z","title_canon_sha256":"b355938e1cf9e4164a497c959d4a5e21bbc7d03c707a6fc6693b1e9e1de4533b"},"schema_version":"1.0","source":{"id":"1809.07829","kind":"arxiv","version":1}},"canonical_sha256":"66a1375f66fa8eea2dd2415b77bcafeb8292011e9d498c9149e138ecf7f4f9f6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66a1375f66fa8eea2dd2415b77bcafeb8292011e9d498c9149e138ecf7f4f9f6","first_computed_at":"2026-05-18T00:05:11.213777Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:11.213777Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SYRcLZiiTBH/kK4K73mdHJWNA7ZHJtHxnRkcHqmXyrUVpxrX23Agjhsvh5NpjDCf/8JZ9zt+ue6hQA7iuFipCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:11.214409Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.07829","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d7321a1440dfa5662c2bc3c4f2e89372d01a7654871f779b6488bdf83e40db4d","sha256:7b0443a4304396b43fdb5760d5b4601cddbdd418cd515763db28a6c4143d7737"],"state_sha256":"6c4960fc425b1e6bc93e746dc9d675751f4f485a793de8de9331467e04407dd7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q67cSKD3NOxcaYdW2uilbI3GvRX7eJAaAW7ObZ3EgNFGs7M3BLEN7dN3jkEaMMd4GfV1SbZXrisyB3FzfzbHCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T06:16:06.159481Z","bundle_sha256":"d4755ac596ad033a670119df4a4daf11dc0ab0c5c381de965c44952c505cf21a"}}