{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HW26RMAEH3JEHXKAMDJICANQRA","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":"338e87fc8d433adde832e9194b42d898f269e4f0fda96b7f940a58b3848aeee6","cross_cats_sorted":["cs.SI","physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2013-01-25T08:25:14Z","title_canon_sha256":"4ecc810ccf57b2b6768e883dbd870d6533a45daeb17fc663f8c61f2d5d7abe21"},"schema_version":"1.0","source":{"id":"1301.5979","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.5979","created_at":"2026-05-18T03:16:40Z"},{"alias_kind":"arxiv_version","alias_value":"1301.5979v3","created_at":"2026-05-18T03:16:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.5979","created_at":"2026-05-18T03:16:40Z"},{"alias_kind":"pith_short_12","alias_value":"HW26RMAEH3JE","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HW26RMAEH3JEHXKA","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HW26RMAE","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:448718c6a6e619c4a82b8721d395b60b062d0a8b3e8f479ebac4180f31b84867","target":"graph","created_at":"2026-05-18T03:16:40Z","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":"Understanding of the mechanisms driving our daily face-to-face encounters is still limited; the field lacks large-scale datasets describing both individual behaviors and their collective interactions. However, here, with the help of travel smart card data, we uncover such encounter mechanisms and structures by constructing a time-resolved in-vehicle social encounter network on public buses in a city (about 5 million residents). This is the first time that such a large network of encounters has been identified and analyzed. Using a population scale dataset, we find physical encounters display r","authors_text":"Der-Horng Lee, Kay W. Axhausen, Lijun Sun, Xianfeng Huang","cross_cats":["cs.SI","physics.data-an"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2013-01-25T08:25:14Z","title":"Understanding metropolitan patterns of daily encounters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.5979","kind":"arxiv","version":3},"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":"sha256:39cdf117a6b7134016edde16295a5db30eddebb5c02bf049912aa9e28408ffc7","target":"record","created_at":"2026-05-18T03:16:40Z","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":"338e87fc8d433adde832e9194b42d898f269e4f0fda96b7f940a58b3848aeee6","cross_cats_sorted":["cs.SI","physics.data-an"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2013-01-25T08:25:14Z","title_canon_sha256":"4ecc810ccf57b2b6768e883dbd870d6533a45daeb17fc663f8c61f2d5d7abe21"},"schema_version":"1.0","source":{"id":"1301.5979","kind":"arxiv","version":3}},"canonical_sha256":"3db5e8b0043ed243dd4060d28101b0883bd1d27756351a3fa485f6a45d2921fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3db5e8b0043ed243dd4060d28101b0883bd1d27756351a3fa485f6a45d2921fd","first_computed_at":"2026-05-18T03:16:40.316050Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:16:40.316050Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+1bFzdc69BOTsbHvar+JPRBpMlhYvF78H0h2fu2Jar/6/Gh/Px/PejkEhiupPBXZvMf8odU+lhAQ5or3kOa8Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:16:40.316686Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.5979","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39cdf117a6b7134016edde16295a5db30eddebb5c02bf049912aa9e28408ffc7","sha256:448718c6a6e619c4a82b8721d395b60b062d0a8b3e8f479ebac4180f31b84867"],"state_sha256":"36a3ca2b06496b75d55ead38c56653aaf34892abe4648570c7142b7cee4c42fe"}