{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:MR76Z626MTUAOH2DEELGHU27HR","short_pith_number":"pith:MR76Z626","canonical_record":{"source":{"id":"1009.5817","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2010-09-29T09:33:21Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"b5027fe493ccb7dfa7b5ce98ca9c15adea033e61ac029c74cfee710077a62b6b","abstract_canon_sha256":"1b67b90f38a58f265d42654c331bd9f96baf2fbed3de364f5c6f45981cbb0840"},"schema_version":"1.0"},"canonical_sha256":"647fecfb5e64e8071f43211663d35f3c598bc64f1b6bef435c9010c8158d5934","source":{"kind":"arxiv","id":"1009.5817","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.5817","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"arxiv_version","alias_value":"1009.5817v1","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.5817","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"pith_short_12","alias_value":"MR76Z626MTUA","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MR76Z626MTUAOH2D","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MR76Z626","created_at":"2026-05-18T12:26:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:MR76Z626MTUAOH2DEELGHU27HR","target":"record","payload":{"canonical_record":{"source":{"id":"1009.5817","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2010-09-29T09:33:21Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"b5027fe493ccb7dfa7b5ce98ca9c15adea033e61ac029c74cfee710077a62b6b","abstract_canon_sha256":"1b67b90f38a58f265d42654c331bd9f96baf2fbed3de364f5c6f45981cbb0840"},"schema_version":"1.0"},"canonical_sha256":"647fecfb5e64e8071f43211663d35f3c598bc64f1b6bef435c9010c8158d5934","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:05:13.709793Z","signature_b64":"jt7jOi3ulEfN6LGCZc3udfcEu+iwz7CdVgb5jrveHDRPyoKZ7BGwvQThZjHTxK414aUj9W2Yy5/tRWRFHQfACA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"647fecfb5e64e8071f43211663d35f3c598bc64f1b6bef435c9010c8158d5934","last_reissued_at":"2026-05-18T02:05:13.708920Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:05:13.708920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1009.5817","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":"2026-05-18T02:05:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QMkrMBoDUTEvIziL1xl0gtj1+tzb1GzIFGLnslt2TxGylDJV9jW6oW81lyf/YJkNumqXPmlG07RtTkp+GCmmCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T03:15:42.468281Z"},"content_sha256":"3dea780fa7342d39ff81721070394ed03e11b76a1748abb4177ff71f45498ac6","schema_version":"1.0","event_id":"sha256:3dea780fa7342d39ff81721070394ed03e11b76a1748abb4177ff71f45498ac6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:MR76Z626MTUAOH2DEELGHU27HR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two-sphere low Reynold's propeller","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.soft"],"primary_cat":"physics.flu-dyn","authors_text":"Ali Najafi, Rojman Zargar","submitted_at":"2010-09-29T09:33:21Z","abstract_excerpt":"A three-dimensional model of a low-Reynold's swimmer is introduced and analyzed in this paper. This model consists of two large and small spheres connected by two perpendicular thin rods. The geometry of this system is motivated by the microorganisms that use a single tail to swim, the large sphere represents the head of microorganism and the small sphere resembles its tail. Each rod changes its length and orientation in a non-reciprocal manner that effectively propel the system. Translational and rotational velocities of the swimmer are studied for different values of parameters. Our findings"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.5817","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":"2026-05-18T02:05:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WR1AfdOI6wSCs+b4NnberPzqEZFkw5Nh/WpUFfTTegA8HbimUfknQ7yY62RJjs19JDr2CdQW0eXCrGA7JhOIAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T03:15:42.469039Z"},"content_sha256":"d931592cab83c31b58cb46af979c672e8cb6f4a7e2c6195b707e6f4f22f08369","schema_version":"1.0","event_id":"sha256:d931592cab83c31b58cb46af979c672e8cb6f4a7e2c6195b707e6f4f22f08369"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MR76Z626MTUAOH2DEELGHU27HR/bundle.json","state_url":"https://pith.science/pith/MR76Z626MTUAOH2DEELGHU27HR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MR76Z626MTUAOH2DEELGHU27HR/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":"2026-06-11T03:15:42Z","links":{"resolver":"https://pith.science/pith/MR76Z626MTUAOH2DEELGHU27HR","bundle":"https://pith.science/pith/MR76Z626MTUAOH2DEELGHU27HR/bundle.json","state":"https://pith.science/pith/MR76Z626MTUAOH2DEELGHU27HR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MR76Z626MTUAOH2DEELGHU27HR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:MR76Z626MTUAOH2DEELGHU27HR","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":"1b67b90f38a58f265d42654c331bd9f96baf2fbed3de364f5c6f45981cbb0840","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2010-09-29T09:33:21Z","title_canon_sha256":"b5027fe493ccb7dfa7b5ce98ca9c15adea033e61ac029c74cfee710077a62b6b"},"schema_version":"1.0","source":{"id":"1009.5817","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1009.5817","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"arxiv_version","alias_value":"1009.5817v1","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1009.5817","created_at":"2026-05-18T02:05:13Z"},{"alias_kind":"pith_short_12","alias_value":"MR76Z626MTUA","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"MR76Z626MTUAOH2D","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"MR76Z626","created_at":"2026-05-18T12:26:10Z"}],"graph_snapshots":[{"event_id":"sha256:d931592cab83c31b58cb46af979c672e8cb6f4a7e2c6195b707e6f4f22f08369","target":"graph","created_at":"2026-05-18T02:05:13Z","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":"A three-dimensional model of a low-Reynold's swimmer is introduced and analyzed in this paper. This model consists of two large and small spheres connected by two perpendicular thin rods. The geometry of this system is motivated by the microorganisms that use a single tail to swim, the large sphere represents the head of microorganism and the small sphere resembles its tail. Each rod changes its length and orientation in a non-reciprocal manner that effectively propel the system. Translational and rotational velocities of the swimmer are studied for different values of parameters. Our findings","authors_text":"Ali Najafi, Rojman Zargar","cross_cats":["cond-mat.soft"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2010-09-29T09:33:21Z","title":"Two-sphere low Reynold's propeller"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1009.5817","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":"sha256:3dea780fa7342d39ff81721070394ed03e11b76a1748abb4177ff71f45498ac6","target":"record","created_at":"2026-05-18T02:05:13Z","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":"1b67b90f38a58f265d42654c331bd9f96baf2fbed3de364f5c6f45981cbb0840","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2010-09-29T09:33:21Z","title_canon_sha256":"b5027fe493ccb7dfa7b5ce98ca9c15adea033e61ac029c74cfee710077a62b6b"},"schema_version":"1.0","source":{"id":"1009.5817","kind":"arxiv","version":1}},"canonical_sha256":"647fecfb5e64e8071f43211663d35f3c598bc64f1b6bef435c9010c8158d5934","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"647fecfb5e64e8071f43211663d35f3c598bc64f1b6bef435c9010c8158d5934","first_computed_at":"2026-05-18T02:05:13.708920Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:05:13.708920Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jt7jOi3ulEfN6LGCZc3udfcEu+iwz7CdVgb5jrveHDRPyoKZ7BGwvQThZjHTxK414aUj9W2Yy5/tRWRFHQfACA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:05:13.709793Z","signed_message":"canonical_sha256_bytes"},"source_id":"1009.5817","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3dea780fa7342d39ff81721070394ed03e11b76a1748abb4177ff71f45498ac6","sha256:d931592cab83c31b58cb46af979c672e8cb6f4a7e2c6195b707e6f4f22f08369"],"state_sha256":"47aaa3e91a3ee0c89de1e65002fe3a477eed23a6985dc88d80b9cfdffde9073e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3TAefpBinKRgazRseVOy5TzLJJdIHp7HZFw1/p7sX43baOw90FfWvY1rY+Pa4QPV+L9Qbdkbo8dcX3qKWpqqAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T03:15:42.472802Z","bundle_sha256":"dd7b2067d553b5f2968b5ccff7cc336bd28e188f65812a34231cadb90bc49918"}}