{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:ZMPAGFWOM57WOJC752U5JN7GYT","short_pith_number":"pith:ZMPAGFWO","canonical_record":{"source":{"id":"1803.09002","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2018-03-23T22:40:52Z","cross_cats_sorted":["cs.CY"],"title_canon_sha256":"9b02855c422fe76ef20010c652789f90f57848903d96f6a08445dc7ef1dd0849","abstract_canon_sha256":"e5f1ba8b6b535ab38d0aeb54855bd99ed393df1e6c5ff82cd9cf29be8fe7e121"},"schema_version":"1.0"},"canonical_sha256":"cb1e0316ce677f67245feea9d4b7e6c4e745fccb0bc667ef1c35b4683b87808c","source":{"kind":"arxiv","id":"1803.09002","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.09002","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1803.09002v3","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.09002","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"ZMPAGFWOM57W","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZMPAGFWOM57WOJC7","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZMPAGFWO","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:ZMPAGFWOM57WOJC752U5JN7GYT","target":"record","payload":{"canonical_record":{"source":{"id":"1803.09002","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2018-03-23T22:40:52Z","cross_cats_sorted":["cs.CY"],"title_canon_sha256":"9b02855c422fe76ef20010c652789f90f57848903d96f6a08445dc7ef1dd0849","abstract_canon_sha256":"e5f1ba8b6b535ab38d0aeb54855bd99ed393df1e6c5ff82cd9cf29be8fe7e121"},"schema_version":"1.0"},"canonical_sha256":"cb1e0316ce677f67245feea9d4b7e6c4e745fccb0bc667ef1c35b4683b87808c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:31.555481Z","signature_b64":"eIiwtrNMmYg7NtjAaeDbTxWTl1SSE8bk6QBdTK2aoZ5P8bIaksZLD9zw3PuSMRtrqsqkK0FHNUFt7aIE3LTSAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb1e0316ce677f67245feea9d4b7e6c4e745fccb0bc667ef1c35b4683b87808c","last_reissued_at":"2026-05-18T00:06:31.555071Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:31.555071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.09002","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kYR8DYWbaCdOl0KU6PmP6r4ZpHIBsD4cYwH21ciShpuBFz+T8AQnS5cxX1tKo4SdmTP1nH936xRXKRpzyicmAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T15:31:49.653635Z"},"content_sha256":"2ebf062906966e914fabc876429e537265726ad099f29c63b42ee89e299c2100","schema_version":"1.0","event_id":"sha256:2ebf062906966e914fabc876429e537265726ad099f29c63b42ee89e299c2100"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:ZMPAGFWOM57WOJC752U5JN7GYT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Socio-spatial Self-organizing Maps: Using Social Media to Assess Relevant Geographies for Exposure to Social Processes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CY"],"primary_cat":"cs.SI","authors_text":"Dustin Duncan, Kunal Relia, Mohammad Akbari, Rumi Chunara","submitted_at":"2018-03-23T22:40:52Z","abstract_excerpt":"Social media offers a unique window into attitudes like racism and homophobia, exposure to which are important, hard to measure and understudied social determinants of health. However, individual geo-located observations from social media are noisy and geographically inconsistent. Existing areas by which exposures are measured, like Zip codes, average over irrelevant administratively-defined boundaries. Hence, in order to enable studies of online social environmental measures like attitudes on social media and their possible relationship to health outcomes, first there is a need for a method t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.09002","kind":"arxiv","version":3},"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":"2026-05-18T00:06:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zTdqfkXcrNeKmOI4HFvNsHyhTIKw98dA6wtCeeQuxvaDKWM/O7mkvAWq24XeRZHEtLbelV8lqgZv8rfULygzDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T15:31:49.654017Z"},"content_sha256":"ef063baf04060eb9ce572c8338e7a0712f7776e486e8d23fa6dd4f3f45a4f1fa","schema_version":"1.0","event_id":"sha256:ef063baf04060eb9ce572c8338e7a0712f7776e486e8d23fa6dd4f3f45a4f1fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZMPAGFWOM57WOJC752U5JN7GYT/bundle.json","state_url":"https://pith.science/pith/ZMPAGFWOM57WOJC752U5JN7GYT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZMPAGFWOM57WOJC752U5JN7GYT/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":"2026-06-07T15:31:49Z","links":{"resolver":"https://pith.science/pith/ZMPAGFWOM57WOJC752U5JN7GYT","bundle":"https://pith.science/pith/ZMPAGFWOM57WOJC752U5JN7GYT/bundle.json","state":"https://pith.science/pith/ZMPAGFWOM57WOJC752U5JN7GYT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZMPAGFWOM57WOJC752U5JN7GYT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:ZMPAGFWOM57WOJC752U5JN7GYT","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":"e5f1ba8b6b535ab38d0aeb54855bd99ed393df1e6c5ff82cd9cf29be8fe7e121","cross_cats_sorted":["cs.CY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2018-03-23T22:40:52Z","title_canon_sha256":"9b02855c422fe76ef20010c652789f90f57848903d96f6a08445dc7ef1dd0849"},"schema_version":"1.0","source":{"id":"1803.09002","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.09002","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"arxiv_version","alias_value":"1803.09002v3","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.09002","created_at":"2026-05-18T00:06:31Z"},{"alias_kind":"pith_short_12","alias_value":"ZMPAGFWOM57W","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZMPAGFWOM57WOJC7","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZMPAGFWO","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:ef063baf04060eb9ce572c8338e7a0712f7776e486e8d23fa6dd4f3f45a4f1fa","target":"graph","created_at":"2026-05-18T00:06:31Z","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 media offers a unique window into attitudes like racism and homophobia, exposure to which are important, hard to measure and understudied social determinants of health. However, individual geo-located observations from social media are noisy and geographically inconsistent. Existing areas by which exposures are measured, like Zip codes, average over irrelevant administratively-defined boundaries. Hence, in order to enable studies of online social environmental measures like attitudes on social media and their possible relationship to health outcomes, first there is a need for a method t","authors_text":"Dustin Duncan, Kunal Relia, Mohammad Akbari, Rumi Chunara","cross_cats":["cs.CY"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2018-03-23T22:40:52Z","title":"Socio-spatial Self-organizing Maps: Using Social Media to Assess Relevant Geographies for Exposure to Social Processes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.09002","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":"sha256:2ebf062906966e914fabc876429e537265726ad099f29c63b42ee89e299c2100","target":"record","created_at":"2026-05-18T00:06:31Z","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":"e5f1ba8b6b535ab38d0aeb54855bd99ed393df1e6c5ff82cd9cf29be8fe7e121","cross_cats_sorted":["cs.CY"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SI","submitted_at":"2018-03-23T22:40:52Z","title_canon_sha256":"9b02855c422fe76ef20010c652789f90f57848903d96f6a08445dc7ef1dd0849"},"schema_version":"1.0","source":{"id":"1803.09002","kind":"arxiv","version":3}},"canonical_sha256":"cb1e0316ce677f67245feea9d4b7e6c4e745fccb0bc667ef1c35b4683b87808c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb1e0316ce677f67245feea9d4b7e6c4e745fccb0bc667ef1c35b4683b87808c","first_computed_at":"2026-05-18T00:06:31.555071Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:31.555071Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eIiwtrNMmYg7NtjAaeDbTxWTl1SSE8bk6QBdTK2aoZ5P8bIaksZLD9zw3PuSMRtrqsqkK0FHNUFt7aIE3LTSAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:31.555481Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.09002","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ebf062906966e914fabc876429e537265726ad099f29c63b42ee89e299c2100","sha256:ef063baf04060eb9ce572c8338e7a0712f7776e486e8d23fa6dd4f3f45a4f1fa"],"state_sha256":"1128c14ed2d9c8ce2b3eb1785808b2330eee71ff51f8cab37b72f1ef336cd214"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tJhsBKF277XKXyBhYUcR++FCCoVsm++FlczBzatFG13vibMGygjnziRqbwayyHtTVbd2L13btsQ2HM72d++CAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T15:31:49.658541Z","bundle_sha256":"252b48057470afe0c675bb5ebcf91e5f17b74e78c6d47ce59d344f0b81ba3b3f"}}