{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2KCGAUNMSFHFAIYK63XYE6MUXV","short_pith_number":"pith:2KCGAUNM","canonical_record":{"source":{"id":"1911.12923","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-11-29T02:13:39Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"5f7b068931d2f8c0c1036f7a22414a3b0bc1a0d9cb6c3fa950cfd9e1ae550b89","abstract_canon_sha256":"56e435be9d19f1bf04ed23549d31431e2e485be5b1b78aba5490f946860a15ef"},"schema_version":"1.0"},"canonical_sha256":"d2846051ac914e50230af6ef827994bd7cbd518aeaa6c95daa1974720a4579a1","source":{"kind":"arxiv","id":"1911.12923","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.12923","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"arxiv_version","alias_value":"1911.12923v1","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.12923","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"pith_short_12","alias_value":"2KCGAUNMSFHF","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"2KCGAUNMSFHFAIYK","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"2KCGAUNM","created_at":"2026-07-05T00:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2KCGAUNMSFHFAIYK63XYE6MUXV","target":"record","payload":{"canonical_record":{"source":{"id":"1911.12923","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-11-29T02:13:39Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"5f7b068931d2f8c0c1036f7a22414a3b0bc1a0d9cb6c3fa950cfd9e1ae550b89","abstract_canon_sha256":"56e435be9d19f1bf04ed23549d31431e2e485be5b1b78aba5490f946860a15ef"},"schema_version":"1.0"},"canonical_sha256":"d2846051ac914e50230af6ef827994bd7cbd518aeaa6c95daa1974720a4579a1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:31:34.386949Z","signature_b64":"D8yVvJpPeS5MO11wRsDoWIfQ8WZ/wFmU4WKxpsglIYb0ZfODAQZhLMUEFb0BwmG71HFHh643Q3xNeOW+5y4uCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2846051ac914e50230af6ef827994bd7cbd518aeaa6c95daa1974720a4579a1","last_reissued_at":"2026-07-05T00:31:34.386505Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:31:34.386505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.12923","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":"2026-07-05T00:31:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7HckDnrHgcWlFuAnGJu7FjRAk+e2F4W8aDKrgqllcKJOd7hE9zFcivSR4Q2s1XpsipwPlxwYSnSfkV39wXOcBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T20:22:20.263374Z"},"content_sha256":"065a46e42290c7fc1ddfd18a09f07e8b71cd2e97561235b0eb6d0f60fc66066c","schema_version":"1.0","event_id":"sha256:065a46e42290c7fc1ddfd18a09f07e8b71cd2e97561235b0eb6d0f60fc66066c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2KCGAUNMSFHFAIYK63XYE6MUXV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Single particle triboelectrification of Titan sand analogs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.soft"],"primary_cat":"astro-ph.EP","authors_text":"Chao He, Patricia McGuiggan, Sarah M. Horst, Xinting Yu","submitted_at":"2019-11-29T02:13:39Z","abstract_excerpt":"Sand electrification is important for aeolian sediment transportation on terrestrial bodies with silicate sand as the main sediment composition. However, it has not been thoroughly studied for icy bodies such as Titan with organic sand as the main dune-forming material. We used the colloidal probe atomic force microscopy (AFM) technique to study triboelectric charging processes using Titan and Earth sand analogs. We found that it is easy to generate triboelectric charges between naphthalene (a simple aromatic hydrocarbon), polystyrene (an aromatic hydrocarbon polymer), and borosilicate glass ("},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.12923","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.12923/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:31:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Iqv5fVOb86SPDzeIkROumfhOIhS08V1RRMi8YRzo95afyWO1EWfZu26HFBiuveLSWTLZZEQhYwJxNukPg28EDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T20:22:20.263791Z"},"content_sha256":"777688c12e9f1b1e77eb68ea601b588f150acfafc38024aaa5c18b83d28b46e4","schema_version":"1.0","event_id":"sha256:777688c12e9f1b1e77eb68ea601b588f150acfafc38024aaa5c18b83d28b46e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2KCGAUNMSFHFAIYK63XYE6MUXV/bundle.json","state_url":"https://pith.science/pith/2KCGAUNMSFHFAIYK63XYE6MUXV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2KCGAUNMSFHFAIYK63XYE6MUXV/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":"2026-08-06T20:22:20Z","links":{"resolver":"https://pith.science/pith/2KCGAUNMSFHFAIYK63XYE6MUXV","bundle":"https://pith.science/pith/2KCGAUNMSFHFAIYK63XYE6MUXV/bundle.json","state":"https://pith.science/pith/2KCGAUNMSFHFAIYK63XYE6MUXV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2KCGAUNMSFHFAIYK63XYE6MUXV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2KCGAUNMSFHFAIYK63XYE6MUXV","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":"56e435be9d19f1bf04ed23549d31431e2e485be5b1b78aba5490f946860a15ef","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-11-29T02:13:39Z","title_canon_sha256":"5f7b068931d2f8c0c1036f7a22414a3b0bc1a0d9cb6c3fa950cfd9e1ae550b89"},"schema_version":"1.0","source":{"id":"1911.12923","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.12923","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"arxiv_version","alias_value":"1911.12923v1","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.12923","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"pith_short_12","alias_value":"2KCGAUNMSFHF","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"2KCGAUNMSFHFAIYK","created_at":"2026-07-05T00:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"2KCGAUNM","created_at":"2026-07-05T00:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:777688c12e9f1b1e77eb68ea601b588f150acfafc38024aaa5c18b83d28b46e4","target":"graph","created_at":"2026-07-05T00:31:34Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1911.12923/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Sand electrification is important for aeolian sediment transportation on terrestrial bodies with silicate sand as the main sediment composition. However, it has not been thoroughly studied for icy bodies such as Titan with organic sand as the main dune-forming material. We used the colloidal probe atomic force microscopy (AFM) technique to study triboelectric charging processes using Titan and Earth sand analogs. We found that it is easy to generate triboelectric charges between naphthalene (a simple aromatic hydrocarbon), polystyrene (an aromatic hydrocarbon polymer), and borosilicate glass (","authors_text":"Chao He, Patricia McGuiggan, Sarah M. Horst, Xinting Yu","cross_cats":["cond-mat.soft"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-11-29T02:13:39Z","title":"Single particle triboelectrification of Titan sand analogs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.12923","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":"sha256:065a46e42290c7fc1ddfd18a09f07e8b71cd2e97561235b0eb6d0f60fc66066c","target":"record","created_at":"2026-07-05T00:31:34Z","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":"56e435be9d19f1bf04ed23549d31431e2e485be5b1b78aba5490f946860a15ef","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-11-29T02:13:39Z","title_canon_sha256":"5f7b068931d2f8c0c1036f7a22414a3b0bc1a0d9cb6c3fa950cfd9e1ae550b89"},"schema_version":"1.0","source":{"id":"1911.12923","kind":"arxiv","version":1}},"canonical_sha256":"d2846051ac914e50230af6ef827994bd7cbd518aeaa6c95daa1974720a4579a1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2846051ac914e50230af6ef827994bd7cbd518aeaa6c95daa1974720a4579a1","first_computed_at":"2026-07-05T00:31:34.386505Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:31:34.386505Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D8yVvJpPeS5MO11wRsDoWIfQ8WZ/wFmU4WKxpsglIYb0ZfODAQZhLMUEFb0BwmG71HFHh643Q3xNeOW+5y4uCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:31:34.386949Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.12923","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:065a46e42290c7fc1ddfd18a09f07e8b71cd2e97561235b0eb6d0f60fc66066c","sha256:777688c12e9f1b1e77eb68ea601b588f150acfafc38024aaa5c18b83d28b46e4"],"state_sha256":"c61c93159bdd38835fb5e79d8b227c8d6752053c69f74dfa09d0049dbb13107e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NrW4pHtTBpLv4qE5vBH0mCk4P+9UB9Ngw2xvJZkkm9BQvhMDB6GIValRQJm3NSvlYAPLlOWKBbuBQ/dbRxSFDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T20:22:20.266763Z","bundle_sha256":"ea6e12fd85b0f45786fb01843d898f4bcb7b1fea071c2657e9871c09b634cd1a"}}