{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:YYMRPY3JKPQID5MOADMHAWYOHZ","short_pith_number":"pith:YYMRPY3J","canonical_record":{"source":{"id":"1704.06187","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2017-04-20T15:31:36Z","cross_cats_sorted":[],"title_canon_sha256":"6462f591160e0c1358f0d60f2c0a0a5dee1500d254eb2039c23bdcd89b2f7339","abstract_canon_sha256":"1050edf534edd195b2c5ab56d883a4b9aa2c2a12981a7bb800ed13fc4a3f9a4b"},"schema_version":"1.0"},"canonical_sha256":"c61917e36953e081f58e00d8705b0e3e7830b0370103dd012fbff0e07cd2a1e7","source":{"kind":"arxiv","id":"1704.06187","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.06187","created_at":"2026-05-18T00:24:17Z"},{"alias_kind":"arxiv_version","alias_value":"1704.06187v2","created_at":"2026-05-18T00:24:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.06187","created_at":"2026-05-18T00:24:17Z"},{"alias_kind":"pith_short_12","alias_value":"YYMRPY3JKPQI","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"YYMRPY3JKPQID5MO","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"YYMRPY3J","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:YYMRPY3JKPQID5MOADMHAWYOHZ","target":"record","payload":{"canonical_record":{"source":{"id":"1704.06187","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2017-04-20T15:31:36Z","cross_cats_sorted":[],"title_canon_sha256":"6462f591160e0c1358f0d60f2c0a0a5dee1500d254eb2039c23bdcd89b2f7339","abstract_canon_sha256":"1050edf534edd195b2c5ab56d883a4b9aa2c2a12981a7bb800ed13fc4a3f9a4b"},"schema_version":"1.0"},"canonical_sha256":"c61917e36953e081f58e00d8705b0e3e7830b0370103dd012fbff0e07cd2a1e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:17.672895Z","signature_b64":"3bmBUfV08rCjw+xsb2jDy+QjE8NZ+uadV0TJoyTre+g8JYy80d3VgLLdpm2v4GhhuiKcoL7ssUOq2bLLkK5aAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c61917e36953e081f58e00d8705b0e3e7830b0370103dd012fbff0e07cd2a1e7","last_reissued_at":"2026-05-18T00:24:17.672204Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:17.672204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.06187","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:24:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ve/PQG82JMJw0fNr7exJ/GFBHbY6P4ugmq6fMURpB4X+MaWglkCxF98JXpHEYJSOWBVHSHhposLtXdp/YCMvBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:06:40.245237Z"},"content_sha256":"4772293cb3b3f1ff0d41bc5a6fc18dc0757736b747899bd3bb8cb588902c0c4e","schema_version":"1.0","event_id":"sha256:4772293cb3b3f1ff0d41bc5a6fc18dc0757736b747899bd3bb8cb588902c0c4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:YYMRPY3JKPQID5MOADMHAWYOHZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Tracking Urban Human Activity from Mobile Phone Calling Patterns","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.soc-ph","authors_text":"Asim Ghosh, Daniel Monsivais, Kimmo Kaski, Kunal Bhattacharya, Robin I.M Dunbar","submitted_at":"2017-04-20T15:31:36Z","abstract_excerpt":"Timings of human activities are marked by circadian clocks which in turn are entrained to different environmental signals. In an urban environment the presence of artificial lighting and various social cues tend to disrupt the natural entrainment with the sunlight. However, it is not completely understood to what extent this is the case. Here we exploit the large-scale data analysis techniques to study the mobile phone calling activity of people in large cities to infer the dynamics of urban daily rhythms. From the calling patterns of about 1,000,000 users spread over different cities but lyin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.06187","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":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:24:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SLm95uPNU3uAofc0SApI+CbJRwn8S4LIQO73rrjKEbrNS2dZu+/SV1ImbI5IUAaAaBBjrvQGrBZL3TXFO6MUBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T11:06:40.245837Z"},"content_sha256":"4c74d7c60fb67459d5177e30b4d354e7d2d00f746ebc36779a22709a3d5b31f4","schema_version":"1.0","event_id":"sha256:4c74d7c60fb67459d5177e30b4d354e7d2d00f746ebc36779a22709a3d5b31f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YYMRPY3JKPQID5MOADMHAWYOHZ/bundle.json","state_url":"https://pith.science/pith/YYMRPY3JKPQID5MOADMHAWYOHZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YYMRPY3JKPQID5MOADMHAWYOHZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-02T11:06:40Z","links":{"resolver":"https://pith.science/pith/YYMRPY3JKPQID5MOADMHAWYOHZ","bundle":"https://pith.science/pith/YYMRPY3JKPQID5MOADMHAWYOHZ/bundle.json","state":"https://pith.science/pith/YYMRPY3JKPQID5MOADMHAWYOHZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YYMRPY3JKPQID5MOADMHAWYOHZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:YYMRPY3JKPQID5MOADMHAWYOHZ","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":"1050edf534edd195b2c5ab56d883a4b9aa2c2a12981a7bb800ed13fc4a3f9a4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2017-04-20T15:31:36Z","title_canon_sha256":"6462f591160e0c1358f0d60f2c0a0a5dee1500d254eb2039c23bdcd89b2f7339"},"schema_version":"1.0","source":{"id":"1704.06187","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.06187","created_at":"2026-05-18T00:24:17Z"},{"alias_kind":"arxiv_version","alias_value":"1704.06187v2","created_at":"2026-05-18T00:24:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.06187","created_at":"2026-05-18T00:24:17Z"},{"alias_kind":"pith_short_12","alias_value":"YYMRPY3JKPQI","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"YYMRPY3JKPQID5MO","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"YYMRPY3J","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:4c74d7c60fb67459d5177e30b4d354e7d2d00f746ebc36779a22709a3d5b31f4","target":"graph","created_at":"2026-05-18T00:24:17Z","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":"Timings of human activities are marked by circadian clocks which in turn are entrained to different environmental signals. In an urban environment the presence of artificial lighting and various social cues tend to disrupt the natural entrainment with the sunlight. However, it is not completely understood to what extent this is the case. Here we exploit the large-scale data analysis techniques to study the mobile phone calling activity of people in large cities to infer the dynamics of urban daily rhythms. From the calling patterns of about 1,000,000 users spread over different cities but lyin","authors_text":"Asim Ghosh, Daniel Monsivais, Kimmo Kaski, Kunal Bhattacharya, Robin I.M Dunbar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2017-04-20T15:31:36Z","title":"Tracking Urban Human Activity from Mobile Phone Calling Patterns"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.06187","kind":"arxiv","version":2},"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":"sha256:4772293cb3b3f1ff0d41bc5a6fc18dc0757736b747899bd3bb8cb588902c0c4e","target":"record","created_at":"2026-05-18T00:24:17Z","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":"1050edf534edd195b2c5ab56d883a4b9aa2c2a12981a7bb800ed13fc4a3f9a4b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.soc-ph","submitted_at":"2017-04-20T15:31:36Z","title_canon_sha256":"6462f591160e0c1358f0d60f2c0a0a5dee1500d254eb2039c23bdcd89b2f7339"},"schema_version":"1.0","source":{"id":"1704.06187","kind":"arxiv","version":2}},"canonical_sha256":"c61917e36953e081f58e00d8705b0e3e7830b0370103dd012fbff0e07cd2a1e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c61917e36953e081f58e00d8705b0e3e7830b0370103dd012fbff0e07cd2a1e7","first_computed_at":"2026-05-18T00:24:17.672204Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:17.672204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3bmBUfV08rCjw+xsb2jDy+QjE8NZ+uadV0TJoyTre+g8JYy80d3VgLLdpm2v4GhhuiKcoL7ssUOq2bLLkK5aAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:17.672895Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.06187","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4772293cb3b3f1ff0d41bc5a6fc18dc0757736b747899bd3bb8cb588902c0c4e","sha256:4c74d7c60fb67459d5177e30b4d354e7d2d00f746ebc36779a22709a3d5b31f4"],"state_sha256":"293823a24f3bcc67a0458a6dc58a60be298087a4a622961c6c0de37fc14f4257"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K3LxGYOp/08cKKEWbRyWF3vLh0HeSxviFnnUS6cywkH++Jtp1zWpdF/fIbXq3HBa09a/S+EPo2XkHocBmiW1Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T11:06:40.249038Z","bundle_sha256":"2c12b107ef41c5423684f7cbfd03d647d0c0598b31a36bb6c9d984e4fc2cd356"}}