{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:VNDTB4XL3QEOVDJ5KOM4PWGYLZ","short_pith_number":"pith:VNDTB4XL","canonical_record":{"source":{"id":"2108.07120","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-08-16T14:41:14Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"87b9b6ecb791fa6400882eb39566e3f524c4bc5e1b9f55075552cfc105da4cb9","abstract_canon_sha256":"2895d597186c7a962a98f7e1ea8db2f8a3e3ba1d0976f73ee55e9571a4ec66db"},"schema_version":"1.0"},"canonical_sha256":"ab4730f2ebdc08ea8d3d5399c7d8d85e60c422c44efa9a571ee7d3b049602588","source":{"kind":"arxiv","id":"2108.07120","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.07120","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"arxiv_version","alias_value":"2108.07120v1","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.07120","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"pith_short_12","alias_value":"VNDTB4XL3QEO","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"pith_short_16","alias_value":"VNDTB4XL3QEOVDJ5","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"pith_short_8","alias_value":"VNDTB4XL","created_at":"2026-07-05T03:06:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:VNDTB4XL3QEOVDJ5KOM4PWGYLZ","target":"record","payload":{"canonical_record":{"source":{"id":"2108.07120","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-08-16T14:41:14Z","cross_cats_sorted":["cs.AI"],"title_canon_sha256":"87b9b6ecb791fa6400882eb39566e3f524c4bc5e1b9f55075552cfc105da4cb9","abstract_canon_sha256":"2895d597186c7a962a98f7e1ea8db2f8a3e3ba1d0976f73ee55e9571a4ec66db"},"schema_version":"1.0"},"canonical_sha256":"ab4730f2ebdc08ea8d3d5399c7d8d85e60c422c44efa9a571ee7d3b049602588","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:06:01.525289Z","signature_b64":"FYCMilJa9vlnP9NGYrI+gghGYZDTcWi/NNYDwBSUCfvJVfyHdQlWsxaA/5wloaG+u4XO0C5ZvR+KAcz44hOhCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ab4730f2ebdc08ea8d3d5399c7d8d85e60c422c44efa9a571ee7d3b049602588","last_reissued_at":"2026-07-05T03:06:01.524888Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:06:01.524888Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.07120","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":"2026-07-05T03:06:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QWBkMZwOWEz9wRDc6KsGGk2WH0Wai4sl9wN9W/7rrudQkQoY6dIne63aGKvJn/8auBcDqND7sP2V35o+VhfqBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:46:17.561048Z"},"content_sha256":"e335694ac3c2e7daabc56334ba83734fc12277599c6827690322dd7dd6c61569","schema_version":"1.0","event_id":"sha256:e335694ac3c2e7daabc56334ba83734fc12277599c6827690322dd7dd6c61569"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:VNDTB4XL3QEOVDJ5KOM4PWGYLZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"AIREX: Neural Network-based Approach for Air Quality Inference in Unmonitored Cities","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.AI"],"primary_cat":"cs.LG","authors_text":"Kei Harada, Makoto Onizuka, Shohei Yamasaki, Yuya Sasaki","submitted_at":"2021-08-16T14:41:14Z","abstract_excerpt":"Urban air pollution is a major environmental problem affecting human health and quality of life. Monitoring stations have been established to continuously obtain air quality information, but they do not cover all areas. Thus, there are numerous methods for spatially fine-grained air quality inference. Since existing methods aim to infer air quality of locations only in monitored cities, they do not assume inferring air quality in unmonitored cities. In this paper, we first study the air quality inference in unmonitored cities. To accurately infer air quality in unmonitored cities, we propose a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.07120","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/2108.07120/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":"2026-07-05T03:06:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h0+EiTqb8UZkJt+rq3w1IA5ghYcK7ZICEQe4vuvBgMHkQwqm7OlSn+IJFNRmXTrLWzloRYYCoULNpLAogzjwCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:46:17.561538Z"},"content_sha256":"9ad6bca1e02bbd8a3e13aff9de2f30171471d184ab3a83764e142a6a061a8e27","schema_version":"1.0","event_id":"sha256:9ad6bca1e02bbd8a3e13aff9de2f30171471d184ab3a83764e142a6a061a8e27"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VNDTB4XL3QEOVDJ5KOM4PWGYLZ/bundle.json","state_url":"https://pith.science/pith/VNDTB4XL3QEOVDJ5KOM4PWGYLZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VNDTB4XL3QEOVDJ5KOM4PWGYLZ/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":"2026-08-06T04:46:17Z","links":{"resolver":"https://pith.science/pith/VNDTB4XL3QEOVDJ5KOM4PWGYLZ","bundle":"https://pith.science/pith/VNDTB4XL3QEOVDJ5KOM4PWGYLZ/bundle.json","state":"https://pith.science/pith/VNDTB4XL3QEOVDJ5KOM4PWGYLZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VNDTB4XL3QEOVDJ5KOM4PWGYLZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:VNDTB4XL3QEOVDJ5KOM4PWGYLZ","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":"2895d597186c7a962a98f7e1ea8db2f8a3e3ba1d0976f73ee55e9571a4ec66db","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-08-16T14:41:14Z","title_canon_sha256":"87b9b6ecb791fa6400882eb39566e3f524c4bc5e1b9f55075552cfc105da4cb9"},"schema_version":"1.0","source":{"id":"2108.07120","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.07120","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"arxiv_version","alias_value":"2108.07120v1","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.07120","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"pith_short_12","alias_value":"VNDTB4XL3QEO","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"pith_short_16","alias_value":"VNDTB4XL3QEOVDJ5","created_at":"2026-07-05T03:06:01Z"},{"alias_kind":"pith_short_8","alias_value":"VNDTB4XL","created_at":"2026-07-05T03:06:01Z"}],"graph_snapshots":[{"event_id":"sha256:9ad6bca1e02bbd8a3e13aff9de2f30171471d184ab3a83764e142a6a061a8e27","target":"graph","created_at":"2026-07-05T03:06:01Z","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/2108.07120/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Urban air pollution is a major environmental problem affecting human health and quality of life. Monitoring stations have been established to continuously obtain air quality information, but they do not cover all areas. Thus, there are numerous methods for spatially fine-grained air quality inference. Since existing methods aim to infer air quality of locations only in monitored cities, they do not assume inferring air quality in unmonitored cities. In this paper, we first study the air quality inference in unmonitored cities. To accurately infer air quality in unmonitored cities, we propose a","authors_text":"Kei Harada, Makoto Onizuka, Shohei Yamasaki, Yuya Sasaki","cross_cats":["cs.AI"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-08-16T14:41:14Z","title":"AIREX: Neural Network-based Approach for Air Quality Inference in Unmonitored Cities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.07120","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:e335694ac3c2e7daabc56334ba83734fc12277599c6827690322dd7dd6c61569","target":"record","created_at":"2026-07-05T03:06:01Z","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":"2895d597186c7a962a98f7e1ea8db2f8a3e3ba1d0976f73ee55e9571a4ec66db","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LG","submitted_at":"2021-08-16T14:41:14Z","title_canon_sha256":"87b9b6ecb791fa6400882eb39566e3f524c4bc5e1b9f55075552cfc105da4cb9"},"schema_version":"1.0","source":{"id":"2108.07120","kind":"arxiv","version":1}},"canonical_sha256":"ab4730f2ebdc08ea8d3d5399c7d8d85e60c422c44efa9a571ee7d3b049602588","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ab4730f2ebdc08ea8d3d5399c7d8d85e60c422c44efa9a571ee7d3b049602588","first_computed_at":"2026-07-05T03:06:01.524888Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:06:01.524888Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FYCMilJa9vlnP9NGYrI+gghGYZDTcWi/NNYDwBSUCfvJVfyHdQlWsxaA/5wloaG+u4XO0C5ZvR+KAcz44hOhCg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:06:01.525289Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.07120","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e335694ac3c2e7daabc56334ba83734fc12277599c6827690322dd7dd6c61569","sha256:9ad6bca1e02bbd8a3e13aff9de2f30171471d184ab3a83764e142a6a061a8e27"],"state_sha256":"10bc92bfdb2fde785b925ecc82ff1c98727c071e121b534005fbbae6341b43b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Iv4984XaWjNk0/P6IbzmvR9csng3M5+QYbCwm+LANmqddVAQ5DBD5mbOL5MAXRUgnOV86Zs/EuwhGh9X+qTtBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T04:46:17.567682Z","bundle_sha256":"1df2c85597d7256e64410a69919d0499afb3d4a60e5313c5a5f819ba4109fa44"}}