{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JO32KVH2OI7VWFU5YHJTNE5LSN","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":"800bb6cc517998f43796b1dce400381e41431c3c7620c67f70c1a285d45141e5","cross_cats_sorted":["cs.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2016-07-20T13:16:53Z","title_canon_sha256":"848fa3ef81dd9faf118589edec0e11a2e0710c7e6452c09c996f5d86bbc45e75"},"schema_version":"1.0","source":{"id":"1607.06429","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1607.06429","created_at":"2026-05-18T01:10:41Z"},{"alias_kind":"arxiv_version","alias_value":"1607.06429v1","created_at":"2026-05-18T01:10:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1607.06429","created_at":"2026-05-18T01:10:41Z"},{"alias_kind":"pith_short_12","alias_value":"JO32KVH2OI7V","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JO32KVH2OI7VWFU5","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JO32KVH2","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:f5f8ae65e6a291b6168fb4ffcaeacd9a92734af998e2674d8547eae6a1a43dc8","target":"graph","created_at":"2026-05-18T01:10:41Z","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":"Existing Location-based social networks (LBSNs), e.g., Foursquare, depend mainly on GPS or cellular-based localization to infer users' locations. However, GPS is unavailable indoors and cellular-based localization provides coarse-grained accuracy. This limits the accuracy of current LBSNs in indoor environments, where people spend 89% of their time. This in turn affects the user experience, in terms of the accuracy of the ranked list of venues, especially for the small screens of mobile devices; misses business opportunities; and leads to reduced venues coverage.\n  In this paper, we present Ch","authors_text":"Anas Basalamah, Moustafa Elhamshary, Moustafa Youssef","cross_cats":["cs.SI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2016-07-20T13:16:53Z","title":"A Fine-grained Indoor Location-based Social Network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1607.06429","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":"sha256:1d2296f276c52d37f0cc16f071fc26fbf582d8092f0838e5ed1f689c373df051","target":"record","created_at":"2026-05-18T01:10:41Z","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":"800bb6cc517998f43796b1dce400381e41431c3c7620c67f70c1a285d45141e5","cross_cats_sorted":["cs.SI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CY","submitted_at":"2016-07-20T13:16:53Z","title_canon_sha256":"848fa3ef81dd9faf118589edec0e11a2e0710c7e6452c09c996f5d86bbc45e75"},"schema_version":"1.0","source":{"id":"1607.06429","kind":"arxiv","version":1}},"canonical_sha256":"4bb7a554fa723f5b169dc1d33693ab935d5af4a87fcc9f7031dfe999d1d5ed96","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4bb7a554fa723f5b169dc1d33693ab935d5af4a87fcc9f7031dfe999d1d5ed96","first_computed_at":"2026-05-18T01:10:41.853918Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:41.853918Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FNi3SrMzvQaDi0+51cyp7LvkTL0pMP8w4AxHvOHs7w+TMEMDLVHIwkRhBcafRU7q+bfdRpf/0p+LjVi0e9cWDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:41.854391Z","signed_message":"canonical_sha256_bytes"},"source_id":"1607.06429","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d2296f276c52d37f0cc16f071fc26fbf582d8092f0838e5ed1f689c373df051","sha256:f5f8ae65e6a291b6168fb4ffcaeacd9a92734af998e2674d8547eae6a1a43dc8"],"state_sha256":"216d7696d1c13f4c1a3c3fadcc4f137fdd7d2ad600adf0eecd6e02e03643f909"}