{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:4RHIRQSJPBDWCM5LP546IGBBQU","short_pith_number":"pith:4RHIRQSJ","canonical_record":{"source":{"id":"1905.02607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2019-05-07T14:27:05Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"a5b69055e8ac9e773887a05789a6128a06c4979f5a53b8cd198a30dfffc5a58e","abstract_canon_sha256":"b2c2018c783e76ab7b7d8e0039b5252e5d522894a8e76261b0efc391d4e0eba4"},"schema_version":"1.0"},"canonical_sha256":"e44e88c24978476133ab7f79e41821851bd6f07ecd7b7f329cc6bfe7739c0928","source":{"kind":"arxiv","id":"1905.02607","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.02607","created_at":"2026-05-17T23:46:50Z"},{"alias_kind":"arxiv_version","alias_value":"1905.02607v1","created_at":"2026-05-17T23:46:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.02607","created_at":"2026-05-17T23:46:50Z"},{"alias_kind":"pith_short_12","alias_value":"4RHIRQSJPBDW","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"4RHIRQSJPBDWCM5L","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"4RHIRQSJ","created_at":"2026-05-18T12:33:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:4RHIRQSJPBDWCM5LP546IGBBQU","target":"record","payload":{"canonical_record":{"source":{"id":"1905.02607","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2019-05-07T14:27:05Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"a5b69055e8ac9e773887a05789a6128a06c4979f5a53b8cd198a30dfffc5a58e","abstract_canon_sha256":"b2c2018c783e76ab7b7d8e0039b5252e5d522894a8e76261b0efc391d4e0eba4"},"schema_version":"1.0"},"canonical_sha256":"e44e88c24978476133ab7f79e41821851bd6f07ecd7b7f329cc6bfe7739c0928","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:50.924096Z","signature_b64":"1EWBof03bT64SI1m1g5zvgZw5pChWcSjpweh6NsMExefk0o3uKcXzUaaUWoq7/qzt9easFXNAVbxHORGFfmYDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e44e88c24978476133ab7f79e41821851bd6f07ecd7b7f329cc6bfe7739c0928","last_reissued_at":"2026-05-17T23:46:50.923713Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:50.923713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.02607","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:46:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5TH4kNzOTxubywNwCgvPv7vaMie+/5t35C8fOndorSwAq69Xwi4r3V08nIBE1TYxNJiUPO8g7Vg6RU66BxIBAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:13:42.283522Z"},"content_sha256":"222d59097aea01e9c6b82a02187b70fca3700eb9360a0b6a702b2821c553acc9","schema_version":"1.0","event_id":"sha256:222d59097aea01e9c6b82a02187b70fca3700eb9360a0b6a702b2821c553acc9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:4RHIRQSJPBDWCM5LP546IGBBQU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"PocketCare: Tracking the Flu with Mobile Phones using Partial Observations of Proximity and Symptoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cs.SI","authors_text":"Bruno Lepri, Chunming Qiao, Tong Guan, Wen Dong","submitted_at":"2019-05-07T14:27:05Z","abstract_excerpt":"Mobile phones provide a powerful sensing platform that researchers may adopt to understand proximity interactions among people and the diffusion, through these interactions, of diseases, behaviors, and opinions. However, it remains a challenge to track the proximity-based interactions of a whole community and then model the social diffusion of diseases and behaviors starting from the observations of a small fraction of the volunteer population. In this paper, we propose a novel approach that tries to connect together these sparse observations using a model of how individuals interact with each"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.02607","kind":"arxiv","version":1},"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":"2026-05-17T23:46:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JNUeDwlG+eAcLoQ8sf9DGVSr+f9H8v7O45GYuDt8NnY0gGM70J5TguXuHJgOo/trx3lzvWWPJGI1kmBcSCD5Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T01:13:42.284240Z"},"content_sha256":"dde79aae4495d01d07bfb0429e11fbf43081db7c615331b9a31a475955a3d3cb","schema_version":"1.0","event_id":"sha256:dde79aae4495d01d07bfb0429e11fbf43081db7c615331b9a31a475955a3d3cb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4RHIRQSJPBDWCM5LP546IGBBQU/bundle.json","state_url":"https://pith.science/pith/4RHIRQSJPBDWCM5LP546IGBBQU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4RHIRQSJPBDWCM5LP546IGBBQU/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":"2026-06-10T01:13:42Z","links":{"resolver":"https://pith.science/pith/4RHIRQSJPBDWCM5LP546IGBBQU","bundle":"https://pith.science/pith/4RHIRQSJPBDWCM5LP546IGBBQU/bundle.json","state":"https://pith.science/pith/4RHIRQSJPBDWCM5LP546IGBBQU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4RHIRQSJPBDWCM5LP546IGBBQU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:4RHIRQSJPBDWCM5LP546IGBBQU","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":"b2c2018c783e76ab7b7d8e0039b5252e5d522894a8e76261b0efc391d4e0eba4","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2019-05-07T14:27:05Z","title_canon_sha256":"a5b69055e8ac9e773887a05789a6128a06c4979f5a53b8cd198a30dfffc5a58e"},"schema_version":"1.0","source":{"id":"1905.02607","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.02607","created_at":"2026-05-17T23:46:50Z"},{"alias_kind":"arxiv_version","alias_value":"1905.02607v1","created_at":"2026-05-17T23:46:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.02607","created_at":"2026-05-17T23:46:50Z"},{"alias_kind":"pith_short_12","alias_value":"4RHIRQSJPBDW","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_16","alias_value":"4RHIRQSJPBDWCM5L","created_at":"2026-05-18T12:33:10Z"},{"alias_kind":"pith_short_8","alias_value":"4RHIRQSJ","created_at":"2026-05-18T12:33:10Z"}],"graph_snapshots":[{"event_id":"sha256:dde79aae4495d01d07bfb0429e11fbf43081db7c615331b9a31a475955a3d3cb","target":"graph","created_at":"2026-05-17T23:46:50Z","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":"Mobile phones provide a powerful sensing platform that researchers may adopt to understand proximity interactions among people and the diffusion, through these interactions, of diseases, behaviors, and opinions. However, it remains a challenge to track the proximity-based interactions of a whole community and then model the social diffusion of diseases and behaviors starting from the observations of a small fraction of the volunteer population. In this paper, we propose a novel approach that tries to connect together these sparse observations using a model of how individuals interact with each","authors_text":"Bruno Lepri, Chunming Qiao, Tong Guan, Wen Dong","cross_cats":["cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2019-05-07T14:27:05Z","title":"PocketCare: Tracking the Flu with Mobile Phones using Partial Observations of Proximity and Symptoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.02607","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":"sha256:222d59097aea01e9c6b82a02187b70fca3700eb9360a0b6a702b2821c553acc9","target":"record","created_at":"2026-05-17T23:46:50Z","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":"b2c2018c783e76ab7b7d8e0039b5252e5d522894a8e76261b0efc391d4e0eba4","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2019-05-07T14:27:05Z","title_canon_sha256":"a5b69055e8ac9e773887a05789a6128a06c4979f5a53b8cd198a30dfffc5a58e"},"schema_version":"1.0","source":{"id":"1905.02607","kind":"arxiv","version":1}},"canonical_sha256":"e44e88c24978476133ab7f79e41821851bd6f07ecd7b7f329cc6bfe7739c0928","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e44e88c24978476133ab7f79e41821851bd6f07ecd7b7f329cc6bfe7739c0928","first_computed_at":"2026-05-17T23:46:50.923713Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:50.923713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1EWBof03bT64SI1m1g5zvgZw5pChWcSjpweh6NsMExefk0o3uKcXzUaaUWoq7/qzt9easFXNAVbxHORGFfmYDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:50.924096Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.02607","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:222d59097aea01e9c6b82a02187b70fca3700eb9360a0b6a702b2821c553acc9","sha256:dde79aae4495d01d07bfb0429e11fbf43081db7c615331b9a31a475955a3d3cb"],"state_sha256":"0d5cb533b0b60208ac4ea4a4ed6889916cd56f5c436416b910ca8addda7192b0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"76WDCEfTmA7CxcR/8ICcnKEp1I2E8PKABH7I+Ac5izdH/R5MMmeKghKVbB2BamLCh/CSqzjAnmsHvkEMqWzhDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T01:13:42.288251Z","bundle_sha256":"316fe71e417c222174709ce80e9b96efb28b0a13d6f43e9341c203228511eda7"}}