{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:TG5QF5N6JYWLSCFDWNXE4ETBRW","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":"f4dfa0f4a0baaa75246f24ffb2b749b389580fd4c689f80a8f8ebdf1a78375ab","cross_cats_sorted":["cs.HC","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2013-05-16T20:47:05Z","title_canon_sha256":"97fa64737c1a7e520a76831e4449b84f541ecba71aacf26d800ddd90212a88fb"},"schema_version":"1.0","source":{"id":"1305.3932","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.3932","created_at":"2026-05-18T03:07:01Z"},{"alias_kind":"arxiv_version","alias_value":"1305.3932v3","created_at":"2026-05-18T03:07:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.3932","created_at":"2026-05-18T03:07:01Z"},{"alias_kind":"pith_short_12","alias_value":"TG5QF5N6JYWL","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TG5QF5N6JYWLSCFD","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TG5QF5N6","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:37bb81eb3401bdddc10d0ddb351ff54bef6b1cfee089d1e749b69a8823e32496","target":"graph","created_at":"2026-05-18T03:07:01Z","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"},"paper":{"abstract_excerpt":"Social Internet content plays an increasingly critical role in many domains, including public health, disaster management, and politics. However, its utility is limited by missing geographic information; for example, fewer than 1.6% of Twitter messages (tweets) contain a geotag. We propose a scalable, content-based approach to estimate the location of tweets using a novel yet simple variant of gaussian mixture models. Further, because real-world applications depend on quantified uncertainty for such estimates, we propose novel metrics of accuracy, precision, and calibration, and we evaluate ou","authors_text":"(2) Illinois Institute of Technology), Aron Culotta (2), Reid Priedhorsky (1), Sara Y. Del Valle (1) ((1) Los Alamos National Laboratory","cross_cats":["cs.HC","cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2013-05-16T20:47:05Z","title":"Inferring the Origin Locations of Tweets with Quantitative Confidence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.3932","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":"sha256:1f2f30738947e9ff3ca842f926778a9382c95bd94f4bb4477e5f8b61a1007e50","target":"record","created_at":"2026-05-18T03:07:01Z","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":"f4dfa0f4a0baaa75246f24ffb2b749b389580fd4c689f80a8f8ebdf1a78375ab","cross_cats_sorted":["cs.HC","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2013-05-16T20:47:05Z","title_canon_sha256":"97fa64737c1a7e520a76831e4449b84f541ecba71aacf26d800ddd90212a88fb"},"schema_version":"1.0","source":{"id":"1305.3932","kind":"arxiv","version":3}},"canonical_sha256":"99bb02f5be4e2cb908a3b36e4e12618dbfd5e2f6120e8ebb253bbbd448447094","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99bb02f5be4e2cb908a3b36e4e12618dbfd5e2f6120e8ebb253bbbd448447094","first_computed_at":"2026-05-18T03:07:01.799642Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:07:01.799642Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Zdpkvp+fTOVrPv30oftgCPv4xPGAWew42zsoAX9Xsuy4kYORPBOl+htbuZs4kAvm9WuHD44xYgKAqcaywwrbBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:07:01.800142Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.3932","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f2f30738947e9ff3ca842f926778a9382c95bd94f4bb4477e5f8b61a1007e50","sha256:37bb81eb3401bdddc10d0ddb351ff54bef6b1cfee089d1e749b69a8823e32496"],"state_sha256":"7d1bc9f533c109f4fb41ed69b839069ffdcf1033a7d3a372963909887fb86025"}