{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:GYDPKLOSXEJIIHMO4QSMWFNR2S","short_pith_number":"pith:GYDPKLOS","schema_version":"1.0","canonical_sha256":"3606f52dd2b912841d8ee424cb15b1d4882c462a9cd0cb76296569dbe333c6f0","source":{"kind":"arxiv","id":"0903.0485","version":2},"attestation_state":"computed","paper":{"title":"On the microscopic foundation of dissipative particle dynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Anders Eriksson, Johan Nystrom, Kolbjorn Tunstrom, Martin Nilsson Jacobi","submitted_at":"2009-03-03T10:18:59Z","abstract_excerpt":"Mesoscopic particle based fluid models, such as dissipative particle dynamics, are usually assumed to be coarse-grained representations of an underlying microscopic fluid. A fundamental question is whether there exists a map from microscopic particles in these systems to the corresponding coarse-grained particles, such that the coarse-grained system has the same bulk and transport properties as the underlying system. In this letter, we investigate the coarse-graining of microscopic fluids using a Voronoi type projection that has been suggested in several studies. The simulations show that the "},"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":"0903.0485","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2009-03-03T10:18:59Z","cross_cats_sorted":[],"title_canon_sha256":"b3ab1fcef0e19402af824e8eba0225faf512dcc8807ffb73ee010c73849270a9","abstract_canon_sha256":"b00b65ee67175be84c22c241af192e9cb9bd11c374b6ba14a8867082ca301625"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:14:37.632537Z","signature_b64":"lFF/2Bi633rjSulRw0z9M9vDanLUGDkazm0Dr6CfBZtlKd1gC7l/uxcoB0OvnktUo+kmYPBvuprIU1rjpoZaDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3606f52dd2b912841d8ee424cb15b1d4882c462a9cd0cb76296569dbe333c6f0","last_reissued_at":"2026-05-18T02:14:37.631743Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:14:37.631743Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"On the microscopic foundation of dissipative particle dynamics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Anders Eriksson, Johan Nystrom, Kolbjorn Tunstrom, Martin Nilsson Jacobi","submitted_at":"2009-03-03T10:18:59Z","abstract_excerpt":"Mesoscopic particle based fluid models, such as dissipative particle dynamics, are usually assumed to be coarse-grained representations of an underlying microscopic fluid. A fundamental question is whether there exists a map from microscopic particles in these systems to the corresponding coarse-grained particles, such that the coarse-grained system has the same bulk and transport properties as the underlying system. In this letter, we investigate the coarse-graining of microscopic fluids using a Voronoi type projection that has been suggested in several studies. The simulations show that the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.0485","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0903.0485","created_at":"2026-05-18T02:14:37.631859+00:00"},{"alias_kind":"arxiv_version","alias_value":"0903.0485v2","created_at":"2026-05-18T02:14:37.631859+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.0485","created_at":"2026-05-18T02:14:37.631859+00:00"},{"alias_kind":"pith_short_12","alias_value":"GYDPKLOSXEJI","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"GYDPKLOSXEJIIHMO","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"GYDPKLOS","created_at":"2026-05-18T12:25:59.703012+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/GYDPKLOSXEJIIHMO4QSMWFNR2S","json":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S.json","graph_json":"https://pith.science/api/pith-number/GYDPKLOSXEJIIHMO4QSMWFNR2S/graph.json","events_json":"https://pith.science/api/pith-number/GYDPKLOSXEJIIHMO4QSMWFNR2S/events.json","paper":"https://pith.science/paper/GYDPKLOS"},"agent_actions":{"view_html":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S","download_json":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S.json","view_paper":"https://pith.science/paper/GYDPKLOS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0903.0485&json=true","fetch_graph":"https://pith.science/api/pith-number/GYDPKLOSXEJIIHMO4QSMWFNR2S/graph.json","fetch_events":"https://pith.science/api/pith-number/GYDPKLOSXEJIIHMO4QSMWFNR2S/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S/action/storage_attestation","attest_author":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S/action/author_attestation","sign_citation":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S/action/citation_signature","submit_replication":"https://pith.science/pith/GYDPKLOSXEJIIHMO4QSMWFNR2S/action/replication_record"}},"created_at":"2026-05-18T02:14:37.631859+00:00","updated_at":"2026-05-18T02:14:37.631859+00:00"}