{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VVN5AFJ4TTU4DW2457HKC4AQ4J","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":"a2d9c1d87d401669732f25a892d64096089ec2517562a4d6a71ff3c1cf9e4b11","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-08-29T19:56:32Z","title_canon_sha256":"002d89a1a90e979dd2a716aac2954654708a84e45d7d14170b9f0d9ae0a63174"},"schema_version":"1.0","source":{"id":"1608.08202","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1608.08202","created_at":"2026-05-18T00:47:13Z"},{"alias_kind":"arxiv_version","alias_value":"1608.08202v3","created_at":"2026-05-18T00:47:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.08202","created_at":"2026-05-18T00:47:13Z"},{"alias_kind":"pith_short_12","alias_value":"VVN5AFJ4TTU4","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VVN5AFJ4TTU4DW24","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VVN5AFJ4","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:837866a63eeb36cce9fd8b1dcaf7b936293f6ac8dc545f43cba54a6dfc3bb2b3","target":"graph","created_at":"2026-05-18T00:47:13Z","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":"Low-cost coin vibrational motors, used in haptic feedback, exhibit rotational internal motion inside a rigid case. Because the motor case motion exhibits rotational symmetry, when placed into a fluid such as glycerin, the motor does not swim even though its vibrations induce steady streaming in the fluid. However, a piece of rubber foam stuck to the curved case and giving the motor neutral buoyancy also breaks the rotational symmetry allowing it to swim. We measured a 1 cm diameter coin vibrational motor swimming in glycerin at a speed of a body length in 3 seconds or at 3 mm/s. The swim speed","authors_text":"Alice C. Quillen, Douglas H. Kelley, Hesam Askari, Patrick W. Oakes, Tamar Friedmann","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-08-29T19:56:32Z","title":"A coin vibrational motor swimming at low Reynolds number"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.08202","kind":"arxiv","version":3},"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:d8cee8ae45dff03f5c1751bc899e34768539ba169c161e7a2a115b11470bbe50","target":"record","created_at":"2026-05-18T00:47:13Z","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":"a2d9c1d87d401669732f25a892d64096089ec2517562a4d6a71ff3c1cf9e4b11","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2016-08-29T19:56:32Z","title_canon_sha256":"002d89a1a90e979dd2a716aac2954654708a84e45d7d14170b9f0d9ae0a63174"},"schema_version":"1.0","source":{"id":"1608.08202","kind":"arxiv","version":3}},"canonical_sha256":"ad5bd0153c9ce9c1db5cefcea17010e27a177a0d116b810731f6b87edb6aff07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ad5bd0153c9ce9c1db5cefcea17010e27a177a0d116b810731f6b87edb6aff07","first_computed_at":"2026-05-18T00:47:13.161356Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:47:13.161356Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ns+4KQtYAY9vA/Bu/YPTKlUyERhS5wwM7VY1ypTgceDE+YuSQdl5OCpEQr4ZYADq+euQgxv0NMzfkqpOF8+1CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:47:13.162066Z","signed_message":"canonical_sha256_bytes"},"source_id":"1608.08202","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8cee8ae45dff03f5c1751bc899e34768539ba169c161e7a2a115b11470bbe50","sha256:837866a63eeb36cce9fd8b1dcaf7b936293f6ac8dc545f43cba54a6dfc3bb2b3"],"state_sha256":"4ca240ced851bd7d83c050f3de686c8d01967d54efc12cd2853077b18049a51e"}