{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:SKUZOBWPFPLEDBKRW5RQ3A4IWP","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":"e7ee2c2feccd45bde99b02da0d52fc83a6ea1b8a009fdec9163c1705a3001047","cross_cats_sorted":["stat.AP"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.LG","submitted_at":"2020-12-22T02:30:16Z","title_canon_sha256":"06adc2447a637737cd5d9215f44f8344ca856227bb48cb7cb0362f73300faf4a"},"schema_version":"1.0","source":{"id":"2012.11796","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.11796","created_at":"2026-07-05T02:01:21Z"},{"alias_kind":"arxiv_version","alias_value":"2012.11796v1","created_at":"2026-07-05T02:01:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.11796","created_at":"2026-07-05T02:01:21Z"},{"alias_kind":"pith_short_12","alias_value":"SKUZOBWPFPLE","created_at":"2026-07-05T02:01:21Z"},{"alias_kind":"pith_short_16","alias_value":"SKUZOBWPFPLEDBKR","created_at":"2026-07-05T02:01:21Z"},{"alias_kind":"pith_short_8","alias_value":"SKUZOBWP","created_at":"2026-07-05T02:01:21Z"}],"graph_snapshots":[{"event_id":"sha256:c4b1fe39b7e9b42c36ba75b1f8b88d652801cc09ab4f934d345adba6855b58f2","target":"graph","created_at":"2026-07-05T02:01:21Z","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/2012.11796/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Information about the spatiotemporal flow of humans within an urban context has a wide plethora of applications. Currently, although there are many different approaches to collect such data, there lacks a standardized framework to analyze it. The focus of this paper is on the analysis of the data collected through passive Wi-Fi sensing, as such passively collected data can have a wide coverage at low cost. We propose a systematic approach by using unsupervised machine learning methods, namely k-means clustering and hierarchical agglomerative clustering (HAC) to analyze data collected through s","authors_text":"Bige Tuncer, Billy Pik Lik Lau, Chau Yuen, Keng Hua Chong, Yuren Zhou, Zann Koh","cross_cats":["stat.AP"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.LG","submitted_at":"2020-12-22T02:30:16Z","title":"Multiple-Perspective Clustering of Passive Wi-Fi Sensing Trajectory Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.11796","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":"sha256:7fc46eafc4287eb3e1d0444d48e08fe73477bf425b89845cf14daf8b2c969d39","target":"record","created_at":"2026-07-05T02:01:21Z","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":"e7ee2c2feccd45bde99b02da0d52fc83a6ea1b8a009fdec9163c1705a3001047","cross_cats_sorted":["stat.AP"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cs.LG","submitted_at":"2020-12-22T02:30:16Z","title_canon_sha256":"06adc2447a637737cd5d9215f44f8344ca856227bb48cb7cb0362f73300faf4a"},"schema_version":"1.0","source":{"id":"2012.11796","kind":"arxiv","version":1}},"canonical_sha256":"92a99706cf2bd6418551b7630d8388b3e6bb76d5c190ee7206428cbf54b6f571","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"92a99706cf2bd6418551b7630d8388b3e6bb76d5c190ee7206428cbf54b6f571","first_computed_at":"2026-07-05T02:01:21.233375Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:01:21.233375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CPe5MuGszI0zColX540lrkFoGoP15118vzweKyuKjDea9eSIvGOTRoHyY9nwJWEm7FxRXT0BLWKv6uxE7JdJBg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:01:21.233710Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.11796","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7fc46eafc4287eb3e1d0444d48e08fe73477bf425b89845cf14daf8b2c969d39","sha256:c4b1fe39b7e9b42c36ba75b1f8b88d652801cc09ab4f934d345adba6855b58f2"],"state_sha256":"bad0c4b7a0fc152a1abaa7f51a5e31b88e1a74977c522ab436e9a3c02ec9c560"}