{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:BTSNPLGNGZVC52S6FY4VAQQ76Y","short_pith_number":"pith:BTSNPLGN","canonical_record":{"source":{"id":"1906.00212","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-01T12:13:37Z","cross_cats_sorted":["physics.soc-ph"],"title_canon_sha256":"7d6b069c3b4625b839f9214cc862adec8a17610ad882bf6c77a4551ffc02a78d","abstract_canon_sha256":"62c497b3af51f63153955b8914769d7c6ec707ba978707bea39140494289b51a"},"schema_version":"1.0"},"canonical_sha256":"0ce4d7accd366a2eea5e2e3950421ff61fe806151c535bdb7896287bb74a5e73","source":{"kind":"arxiv","id":"1906.00212","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.00212","created_at":"2026-05-17T23:39:30Z"},{"alias_kind":"arxiv_version","alias_value":"1906.00212v2","created_at":"2026-05-17T23:39:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.00212","created_at":"2026-05-17T23:39:30Z"},{"alias_kind":"pith_short_12","alias_value":"BTSNPLGNGZVC","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BTSNPLGNGZVC52S6","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BTSNPLGN","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:BTSNPLGNGZVC52S6FY4VAQQ76Y","target":"record","payload":{"canonical_record":{"source":{"id":"1906.00212","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-01T12:13:37Z","cross_cats_sorted":["physics.soc-ph"],"title_canon_sha256":"7d6b069c3b4625b839f9214cc862adec8a17610ad882bf6c77a4551ffc02a78d","abstract_canon_sha256":"62c497b3af51f63153955b8914769d7c6ec707ba978707bea39140494289b51a"},"schema_version":"1.0"},"canonical_sha256":"0ce4d7accd366a2eea5e2e3950421ff61fe806151c535bdb7896287bb74a5e73","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:39:30.077102Z","signature_b64":"vOG8AhRP3NPBm3Vcs+5DwbI91UTLDeosw7+X5l8rq77oS/sotGazE0l8cYcWQVHvwpNR4g+45elsY2IPBmtQAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ce4d7accd366a2eea5e2e3950421ff61fe806151c535bdb7896287bb74a5e73","last_reissued_at":"2026-05-17T23:39:30.076651Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:39:30.076651Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.00212","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":"2026-05-17T23:39:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DLPV+exjDmQ/PfmzTW2CjGS5Mtxc7wY+1G1v5KdB7ERpzFSzu6H7enNrtokGTpuzs/23f0IkzkWnb66BbzOODg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T13:12:20.810978Z"},"content_sha256":"6ece67f676a08045e2cf87e0f51bf9512893fbbea66e737621b383a5f21c3f0d","schema_version":"1.0","event_id":"sha256:6ece67f676a08045e2cf87e0f51bf9512893fbbea66e737621b383a5f21c3f0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:BTSNPLGNGZVC52S6FY4VAQQ76Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Caesium fallout in Tokyo on 15th March, 2011 is dominated by highly radioactive, caesium-rich microparticles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.soc-ph"],"primary_cat":"physics.med-ph","authors_text":"Asumi Ochiai, Bernd Grambow, Genki Furuki, Kenji Nanba, Rodney C. Ewing, Satoshi Utsunomiya, Shinya Yamasaki","submitted_at":"2019-06-01T12:13:37Z","abstract_excerpt":"In order to understand the chemical properties and environmental impacts of low-solubility Cs-rich microparticles (CsMPs) derived from the FDNPP, the CsMPs collected from Tokyo were investigated at the atomic scale using high-resolution transmission electron microscopy (HRTEM) and dissolution experiments were performed on the air filters. Remarkably, CsMPs 0.58-2.0 micrometer in size constituted 80%-89% of the total Cs radioactivity during the initial fallout events on 15th March, 2011. The CsMPs from Tokyo and Fukushima exhibit the same texture at the nanoscale: aggregates of Zn-Fe-oxide nano"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.00212","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":"2026-05-17T23:39:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C1wjckJl3KRhM/FaOnbDa43PN8/lS0auYVfPRs98y0+qSAGojh2zoZ5RzBu9BX6kU1mz9x+fBBFJ8VHb7EOSAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T13:12:20.812375Z"},"content_sha256":"6a9fe19933df3cbc6dd43632ade524fa98a2876643a2d95f91925a4e00540b8a","schema_version":"1.0","event_id":"sha256:6a9fe19933df3cbc6dd43632ade524fa98a2876643a2d95f91925a4e00540b8a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BTSNPLGNGZVC52S6FY4VAQQ76Y/bundle.json","state_url":"https://pith.science/pith/BTSNPLGNGZVC52S6FY4VAQQ76Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BTSNPLGNGZVC52S6FY4VAQQ76Y/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":"2026-06-06T13:12:20Z","links":{"resolver":"https://pith.science/pith/BTSNPLGNGZVC52S6FY4VAQQ76Y","bundle":"https://pith.science/pith/BTSNPLGNGZVC52S6FY4VAQQ76Y/bundle.json","state":"https://pith.science/pith/BTSNPLGNGZVC52S6FY4VAQQ76Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BTSNPLGNGZVC52S6FY4VAQQ76Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:BTSNPLGNGZVC52S6FY4VAQQ76Y","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":"62c497b3af51f63153955b8914769d7c6ec707ba978707bea39140494289b51a","cross_cats_sorted":["physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-01T12:13:37Z","title_canon_sha256":"7d6b069c3b4625b839f9214cc862adec8a17610ad882bf6c77a4551ffc02a78d"},"schema_version":"1.0","source":{"id":"1906.00212","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.00212","created_at":"2026-05-17T23:39:30Z"},{"alias_kind":"arxiv_version","alias_value":"1906.00212v2","created_at":"2026-05-17T23:39:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.00212","created_at":"2026-05-17T23:39:30Z"},{"alias_kind":"pith_short_12","alias_value":"BTSNPLGNGZVC","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BTSNPLGNGZVC52S6","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BTSNPLGN","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:6a9fe19933df3cbc6dd43632ade524fa98a2876643a2d95f91925a4e00540b8a","target":"graph","created_at":"2026-05-17T23:39:30Z","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":"In order to understand the chemical properties and environmental impacts of low-solubility Cs-rich microparticles (CsMPs) derived from the FDNPP, the CsMPs collected from Tokyo were investigated at the atomic scale using high-resolution transmission electron microscopy (HRTEM) and dissolution experiments were performed on the air filters. Remarkably, CsMPs 0.58-2.0 micrometer in size constituted 80%-89% of the total Cs radioactivity during the initial fallout events on 15th March, 2011. The CsMPs from Tokyo and Fukushima exhibit the same texture at the nanoscale: aggregates of Zn-Fe-oxide nano","authors_text":"Asumi Ochiai, Bernd Grambow, Genki Furuki, Kenji Nanba, Rodney C. Ewing, Satoshi Utsunomiya, Shinya Yamasaki","cross_cats":["physics.soc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-01T12:13:37Z","title":"Caesium fallout in Tokyo on 15th March, 2011 is dominated by highly radioactive, caesium-rich microparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.00212","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":"sha256:6ece67f676a08045e2cf87e0f51bf9512893fbbea66e737621b383a5f21c3f0d","target":"record","created_at":"2026-05-17T23:39:30Z","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":"62c497b3af51f63153955b8914769d7c6ec707ba978707bea39140494289b51a","cross_cats_sorted":["physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-01T12:13:37Z","title_canon_sha256":"7d6b069c3b4625b839f9214cc862adec8a17610ad882bf6c77a4551ffc02a78d"},"schema_version":"1.0","source":{"id":"1906.00212","kind":"arxiv","version":2}},"canonical_sha256":"0ce4d7accd366a2eea5e2e3950421ff61fe806151c535bdb7896287bb74a5e73","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ce4d7accd366a2eea5e2e3950421ff61fe806151c535bdb7896287bb74a5e73","first_computed_at":"2026-05-17T23:39:30.076651Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:39:30.076651Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vOG8AhRP3NPBm3Vcs+5DwbI91UTLDeosw7+X5l8rq77oS/sotGazE0l8cYcWQVHvwpNR4g+45elsY2IPBmtQAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:39:30.077102Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.00212","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6ece67f676a08045e2cf87e0f51bf9512893fbbea66e737621b383a5f21c3f0d","sha256:6a9fe19933df3cbc6dd43632ade524fa98a2876643a2d95f91925a4e00540b8a"],"state_sha256":"d2146d08bcd052049d5d8fedc03de3cc1e39ed4980a5c2f3d426dc4dd60ae05e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vtIWED6WsWo9yq3j3i+U/7R+vTEyfiMejIBbC2c3Qr8juNu9MiZSKKb0SO956+Cn48aZnoOpuXDxGbainRUzAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T13:12:20.816409Z","bundle_sha256":"7b6e5c7153014f87457ea40ee2daf9e37a0db80a2a744505feb2add36ad98769"}}