{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4V6RR5BHCKXOQGZXHXWUXZ5LV5","short_pith_number":"pith:4V6RR5BH","canonical_record":{"source":{"id":"1812.03694","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-12-10T09:45:13Z","cross_cats_sorted":[],"title_canon_sha256":"724a94cdc30042da4795a6849e4be6b00ef8be444f7fd8990b2e492cc4906977","abstract_canon_sha256":"0a5f3d2be5a3e6272eaa10a12f64addadb83e4ebd7f62f3d5cc7788c608a3f0d"},"schema_version":"1.0"},"canonical_sha256":"e57d18f42712aee81b373ded4be7abaf7fde3b4fcb9b9ca063d2d23c6f576965","source":{"kind":"arxiv","id":"1812.03694","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03694","created_at":"2026-05-17T23:58:44Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03694v1","created_at":"2026-05-17T23:58:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03694","created_at":"2026-05-17T23:58:44Z"},{"alias_kind":"pith_short_12","alias_value":"4V6RR5BHCKXO","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4V6RR5BHCKXOQGZX","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4V6RR5BH","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4V6RR5BHCKXOQGZXHXWUXZ5LV5","target":"record","payload":{"canonical_record":{"source":{"id":"1812.03694","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-12-10T09:45:13Z","cross_cats_sorted":[],"title_canon_sha256":"724a94cdc30042da4795a6849e4be6b00ef8be444f7fd8990b2e492cc4906977","abstract_canon_sha256":"0a5f3d2be5a3e6272eaa10a12f64addadb83e4ebd7f62f3d5cc7788c608a3f0d"},"schema_version":"1.0"},"canonical_sha256":"e57d18f42712aee81b373ded4be7abaf7fde3b4fcb9b9ca063d2d23c6f576965","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:58:44.115954Z","signature_b64":"fEJfktQfZ/FU/JoiwedmHyrFRHHG6N1fEkOJ31V/QM+iVx9/vZ/JrOa2o8iteJqitD45qmRVCCV+tJJF+JlrAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e57d18f42712aee81b373ded4be7abaf7fde3b4fcb9b9ca063d2d23c6f576965","last_reissued_at":"2026-05-17T23:58:44.115335Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:58:44.115335Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.03694","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":"2026-05-17T23:58:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mQuw3omw38lELMaKns/yby6nCTs8RYgtlY18/e8VRu5Ds6n/BD9KCYu3t19FIDGEiHJsdESWTav9sj8EeSwDBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T04:29:22.878282Z"},"content_sha256":"08b5b5698a5b2a92356ef2ebacff581ca8ee1755bbcc7b0e60d7ad80bbc26f0d","schema_version":"1.0","event_id":"sha256:08b5b5698a5b2a92356ef2ebacff581ca8ee1755bbcc7b0e60d7ad80bbc26f0d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4V6RR5BHCKXOQGZXHXWUXZ5LV5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Active particles under confinement and effective force generation among surfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.stat-mech","authors_text":"Lorenzo Caprini, Umberto Marini Bettolo Marconi","submitted_at":"2018-12-10T09:45:13Z","abstract_excerpt":"We consider the effect of geometric confinement on the steady-state properties of a one-dimensional active suspension subject to thermal noise. The random active force is modeled by an Ornstein-Uhlenbeck process and the system is studied both numerically, by integrating the Langevin governing equations, and analytically by solving the associated Fokker-Planck equation under suitable approximations. The comparison between the two approaches displays a fairly good agreement and in particular, we show that the Fokker-Planck approach can predict the structure of the system both in the wall region "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03694","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":"2026-05-17T23:58:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vy3K+fADRiyiNCgLZQC8I2viQBuVTrjlZb5javYDxrrhgVzmgGFVchaHeRuDQaClEPf+ac0Uq3JvWU6jybQpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T04:29:22.879010Z"},"content_sha256":"a4413ed813e11cccf0b3c047da82225be3354a17d78799cfef98598c4cebe999","schema_version":"1.0","event_id":"sha256:a4413ed813e11cccf0b3c047da82225be3354a17d78799cfef98598c4cebe999"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4V6RR5BHCKXOQGZXHXWUXZ5LV5/bundle.json","state_url":"https://pith.science/pith/4V6RR5BHCKXOQGZXHXWUXZ5LV5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4V6RR5BHCKXOQGZXHXWUXZ5LV5/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":"2026-05-27T04:29:22Z","links":{"resolver":"https://pith.science/pith/4V6RR5BHCKXOQGZXHXWUXZ5LV5","bundle":"https://pith.science/pith/4V6RR5BHCKXOQGZXHXWUXZ5LV5/bundle.json","state":"https://pith.science/pith/4V6RR5BHCKXOQGZXHXWUXZ5LV5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4V6RR5BHCKXOQGZXHXWUXZ5LV5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4V6RR5BHCKXOQGZXHXWUXZ5LV5","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":"0a5f3d2be5a3e6272eaa10a12f64addadb83e4ebd7f62f3d5cc7788c608a3f0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-12-10T09:45:13Z","title_canon_sha256":"724a94cdc30042da4795a6849e4be6b00ef8be444f7fd8990b2e492cc4906977"},"schema_version":"1.0","source":{"id":"1812.03694","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.03694","created_at":"2026-05-17T23:58:44Z"},{"alias_kind":"arxiv_version","alias_value":"1812.03694v1","created_at":"2026-05-17T23:58:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.03694","created_at":"2026-05-17T23:58:44Z"},{"alias_kind":"pith_short_12","alias_value":"4V6RR5BHCKXO","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4V6RR5BHCKXOQGZX","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4V6RR5BH","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:a4413ed813e11cccf0b3c047da82225be3354a17d78799cfef98598c4cebe999","target":"graph","created_at":"2026-05-17T23:58:44Z","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":"We consider the effect of geometric confinement on the steady-state properties of a one-dimensional active suspension subject to thermal noise. The random active force is modeled by an Ornstein-Uhlenbeck process and the system is studied both numerically, by integrating the Langevin governing equations, and analytically by solving the associated Fokker-Planck equation under suitable approximations. The comparison between the two approaches displays a fairly good agreement and in particular, we show that the Fokker-Planck approach can predict the structure of the system both in the wall region ","authors_text":"Lorenzo Caprini, Umberto Marini Bettolo Marconi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-12-10T09:45:13Z","title":"Active particles under confinement and effective force generation among surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.03694","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":"sha256:08b5b5698a5b2a92356ef2ebacff581ca8ee1755bbcc7b0e60d7ad80bbc26f0d","target":"record","created_at":"2026-05-17T23:58:44Z","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":"0a5f3d2be5a3e6272eaa10a12f64addadb83e4ebd7f62f3d5cc7788c608a3f0d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.stat-mech","submitted_at":"2018-12-10T09:45:13Z","title_canon_sha256":"724a94cdc30042da4795a6849e4be6b00ef8be444f7fd8990b2e492cc4906977"},"schema_version":"1.0","source":{"id":"1812.03694","kind":"arxiv","version":1}},"canonical_sha256":"e57d18f42712aee81b373ded4be7abaf7fde3b4fcb9b9ca063d2d23c6f576965","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e57d18f42712aee81b373ded4be7abaf7fde3b4fcb9b9ca063d2d23c6f576965","first_computed_at":"2026-05-17T23:58:44.115335Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:44.115335Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fEJfktQfZ/FU/JoiwedmHyrFRHHG6N1fEkOJ31V/QM+iVx9/vZ/JrOa2o8iteJqitD45qmRVCCV+tJJF+JlrAg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:44.115954Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.03694","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:08b5b5698a5b2a92356ef2ebacff581ca8ee1755bbcc7b0e60d7ad80bbc26f0d","sha256:a4413ed813e11cccf0b3c047da82225be3354a17d78799cfef98598c4cebe999"],"state_sha256":"c5e2308d2600901dc7ed7cd397012ad0f145367a47d45b139062e298c9982961"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0cyQN0URXtqid+y6svZzOrowOIzXYW1S/c8UVwrEEN7v7i/ubr6EDu6FMqbfqQbwYSjh3gyfe70hYC0B2CxGDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T04:29:22.882870Z","bundle_sha256":"87d85e5c46ba911a24b90321347a9683dbb2e9b0df25269f45c23181ca879f07"}}