{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:VI2YYJLHRWHBDCFMVN5S4S7U66","short_pith_number":"pith:VI2YYJLH","schema_version":"1.0","canonical_sha256":"aa358c25678d8e1188acab7b2e4bf4f7b2c42c76e5908a32ca14f3afcbf2fc58","source":{"kind":"arxiv","id":"2102.09902","version":2},"attestation_state":"computed","paper":{"title":"Numerical study of COVID-19 spatial-temporal spreading in London","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CE","physics.flu-dyn"],"primary_cat":"physics.med-ph","authors_text":"B. Xiang, C. C. Pain, F. Fang, H. Xiao, J. Li, J. Zheng, J. Zhu, P. F. Linden, X. Wu, Z. Wang","submitted_at":"2021-02-19T12:50:15Z","abstract_excerpt":"Recent study reported that an aerosolised virus (COVID-19) can survive in the air for a few hours. It is highly possible that people get infected with the disease by breathing and contact with items contaminated by the aerosolised virus. However, the aerosolised virus transmission and trajectories in various meteorological environments remain unclear. This paper has investigated the movement of aerosolised viruses from a high concentration source across a dense urban area. The case study looks at the highly air polluted areas of London: University College Hospital (UCH) and King Cross and St P"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2102.09902","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-02-19T12:50:15Z","cross_cats_sorted":["cs.CE","physics.flu-dyn"],"title_canon_sha256":"1bf6a840c279290c411283fd348b623382aa2683bbb2324ada38306e4db790b2","abstract_canon_sha256":"7ca11a7aab4f498d73bfb6eea2f771a15783f953d7fb4a8a979747ab89565e82"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:37:36.432942Z","signature_b64":"7MrSvaXEVuisiCRTeMuDsAIzKQsrooWOCk+SnD4kevtPNm0w5AcLUKyQ3nIdCMAK6LwDXwMgIq2rdAwX71SOBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa358c25678d8e1188acab7b2e4bf4f7b2c42c76e5908a32ca14f3afcbf2fc58","last_reissued_at":"2026-07-05T02:37:36.432404Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:37:36.432404Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Numerical study of COVID-19 spatial-temporal spreading in London","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CE","physics.flu-dyn"],"primary_cat":"physics.med-ph","authors_text":"B. Xiang, C. C. Pain, F. Fang, H. Xiao, J. Li, J. Zheng, J. Zhu, P. F. Linden, X. Wu, Z. Wang","submitted_at":"2021-02-19T12:50:15Z","abstract_excerpt":"Recent study reported that an aerosolised virus (COVID-19) can survive in the air for a few hours. It is highly possible that people get infected with the disease by breathing and contact with items contaminated by the aerosolised virus. However, the aerosolised virus transmission and trajectories in various meteorological environments remain unclear. This paper has investigated the movement of aerosolised viruses from a high concentration source across a dense urban area. The case study looks at the highly air polluted areas of London: University College Hospital (UCH) and King Cross and St P"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2102.09902","kind":"arxiv","version":2},"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/2102.09902/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2102.09902","created_at":"2026-07-05T02:37:36.432464+00:00"},{"alias_kind":"arxiv_version","alias_value":"2102.09902v2","created_at":"2026-07-05T02:37:36.432464+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2102.09902","created_at":"2026-07-05T02:37:36.432464+00:00"},{"alias_kind":"pith_short_12","alias_value":"VI2YYJLHRWHB","created_at":"2026-07-05T02:37:36.432464+00:00"},{"alias_kind":"pith_short_16","alias_value":"VI2YYJLHRWHBDCFM","created_at":"2026-07-05T02:37:36.432464+00:00"},{"alias_kind":"pith_short_8","alias_value":"VI2YYJLH","created_at":"2026-07-05T02:37:36.432464+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66","json":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66.json","graph_json":"https://pith.science/api/pith-number/VI2YYJLHRWHBDCFMVN5S4S7U66/graph.json","events_json":"https://pith.science/api/pith-number/VI2YYJLHRWHBDCFMVN5S4S7U66/events.json","paper":"https://pith.science/paper/VI2YYJLH"},"agent_actions":{"view_html":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66","download_json":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66.json","view_paper":"https://pith.science/paper/VI2YYJLH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2102.09902&json=true","fetch_graph":"https://pith.science/api/pith-number/VI2YYJLHRWHBDCFMVN5S4S7U66/graph.json","fetch_events":"https://pith.science/api/pith-number/VI2YYJLHRWHBDCFMVN5S4S7U66/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66/action/storage_attestation","attest_author":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66/action/author_attestation","sign_citation":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66/action/citation_signature","submit_replication":"https://pith.science/pith/VI2YYJLHRWHBDCFMVN5S4S7U66/action/replication_record"}},"created_at":"2026-07-05T02:37:36.432464+00:00","updated_at":"2026-07-05T02:37:36.432464+00:00"}