{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:YTSZEGQODMPIDAVZNRUFVM3LGS","short_pith_number":"pith:YTSZEGQO","schema_version":"1.0","canonical_sha256":"c4e5921a0e1b1e8182b96c685ab36b34ba4a133a8cead5ffeccda6982a1de96b","source":{"kind":"arxiv","id":"1707.08665","version":1},"attestation_state":"computed","paper":{"title":"Focusing of Active Particles in a Converging Flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech"],"primary_cat":"cond-mat.soft","authors_text":"Andreas Kaiser, Igor Aranson, Leonid Berlyand, Mykhailo Potomkin","submitted_at":"2017-07-26T23:43:23Z","abstract_excerpt":"We consider active particles swimming in a convergent fluid flow in a trapezoid nozzle with no-slip walls. We use mathematical modeling to analyze trajectories of these particles inside the nozzle. By extensive Monte Carlo simulations, we show that trajectories are strongly affected by the background fluid flow and geometry of the nozzle leading to wall accumulation and upstream motion (rheotaxis). In particular, we describe the non-trivial focusing of active rods depending on physical and geometrical parameters. It is also established that the convergent component of the background flow leads"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1707.08665","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2017-07-26T23:43:23Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"6c950c3d7938d270ea3795a59796226ec2136a6db0181888c772c2777939428f","abstract_canon_sha256":"572a10abb82cc63bd3bcb8c92065138694812c0bea050f922755074bc569302d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:28:53.255118Z","signature_b64":"003K8pgr2DE80TUdRAOGcUCfixml0OuMD7WRygHp/l7NCYH7dKvMONqsyYWPOiIvnzM/bp9M0Zc3BM17akN2Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c4e5921a0e1b1e8182b96c685ab36b34ba4a133a8cead5ffeccda6982a1de96b","last_reissued_at":"2026-05-18T00:28:53.254681Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:28:53.254681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Focusing of Active Particles in a Converging Flow","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech"],"primary_cat":"cond-mat.soft","authors_text":"Andreas Kaiser, Igor Aranson, Leonid Berlyand, Mykhailo Potomkin","submitted_at":"2017-07-26T23:43:23Z","abstract_excerpt":"We consider active particles swimming in a convergent fluid flow in a trapezoid nozzle with no-slip walls. We use mathematical modeling to analyze trajectories of these particles inside the nozzle. By extensive Monte Carlo simulations, we show that trajectories are strongly affected by the background fluid flow and geometry of the nozzle leading to wall accumulation and upstream motion (rheotaxis). In particular, we describe the non-trivial focusing of active rods depending on physical and geometrical parameters. It is also established that the convergent component of the background flow leads"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.08665","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1707.08665","created_at":"2026-05-18T00:28:53.254742+00:00"},{"alias_kind":"arxiv_version","alias_value":"1707.08665v1","created_at":"2026-05-18T00:28:53.254742+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.08665","created_at":"2026-05-18T00:28:53.254742+00:00"},{"alias_kind":"pith_short_12","alias_value":"YTSZEGQODMPI","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_16","alias_value":"YTSZEGQODMPIDAVZ","created_at":"2026-05-18T12:31:56.362134+00:00"},{"alias_kind":"pith_short_8","alias_value":"YTSZEGQO","created_at":"2026-05-18T12:31:56.362134+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS","json":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS.json","graph_json":"https://pith.science/api/pith-number/YTSZEGQODMPIDAVZNRUFVM3LGS/graph.json","events_json":"https://pith.science/api/pith-number/YTSZEGQODMPIDAVZNRUFVM3LGS/events.json","paper":"https://pith.science/paper/YTSZEGQO"},"agent_actions":{"view_html":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS","download_json":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS.json","view_paper":"https://pith.science/paper/YTSZEGQO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1707.08665&json=true","fetch_graph":"https://pith.science/api/pith-number/YTSZEGQODMPIDAVZNRUFVM3LGS/graph.json","fetch_events":"https://pith.science/api/pith-number/YTSZEGQODMPIDAVZNRUFVM3LGS/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS/action/storage_attestation","attest_author":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS/action/author_attestation","sign_citation":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS/action/citation_signature","submit_replication":"https://pith.science/pith/YTSZEGQODMPIDAVZNRUFVM3LGS/action/replication_record"}},"created_at":"2026-05-18T00:28:53.254742+00:00","updated_at":"2026-05-18T00:28:53.254742+00:00"}