{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:JZ2ULM2C27F5FNBHGZDKP7MP2S","short_pith_number":"pith:JZ2ULM2C","canonical_record":{"source":{"id":"1902.04758","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-02-13T06:08:47Z","cross_cats_sorted":[],"title_canon_sha256":"2e11661e3e3b2bb34c66fd7fba9b6e81583f4ceb8bf3ab371c87fe14e9ed29c8","abstract_canon_sha256":"b6be5c31964dd7b44ec518f4bc8c398a21a63028909ebc99ed3fbda952219d86"},"schema_version":"1.0"},"canonical_sha256":"4e7545b342d7cbd2b4273646a7fd8fd480ad4bfd230947105d80b9a3125b50a8","source":{"kind":"arxiv","id":"1902.04758","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.04758","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"arxiv_version","alias_value":"1902.04758v1","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.04758","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"pith_short_12","alias_value":"JZ2ULM2C27F5","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"JZ2ULM2C27F5FNBH","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"JZ2ULM2C","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:JZ2ULM2C27F5FNBHGZDKP7MP2S","target":"record","payload":{"canonical_record":{"source":{"id":"1902.04758","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-02-13T06:08:47Z","cross_cats_sorted":[],"title_canon_sha256":"2e11661e3e3b2bb34c66fd7fba9b6e81583f4ceb8bf3ab371c87fe14e9ed29c8","abstract_canon_sha256":"b6be5c31964dd7b44ec518f4bc8c398a21a63028909ebc99ed3fbda952219d86"},"schema_version":"1.0"},"canonical_sha256":"4e7545b342d7cbd2b4273646a7fd8fd480ad4bfd230947105d80b9a3125b50a8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:48:41.622468Z","signature_b64":"k01AHq8ik791IrPnyQwjNMIMTh0aZW4IglSe9BC+Ofv5ESwpgGYxfLpcUwRXQpQGMFf8NFc7ZN6SHcHDd0c0BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4e7545b342d7cbd2b4273646a7fd8fd480ad4bfd230947105d80b9a3125b50a8","last_reissued_at":"2026-05-17T23:48:41.622017Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:48:41.622017Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.04758","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":"2026-05-17T23:48:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tbGjVL7+eeqe7n6hLMsFX8UNRoYDbBUvQwPEYrAQIgfCWMPyA93LEZiVbz39P2epULAfkCJPv//xkGggXtMiCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:11:05.363431Z"},"content_sha256":"bdb74e22bbe20fb595a6a8db7502260a268b1c599bd1f92ea4395a13f3977d44","schema_version":"1.0","event_id":"sha256:bdb74e22bbe20fb595a6a8db7502260a268b1c599bd1f92ea4395a13f3977d44"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:JZ2ULM2C27F5FNBHGZDKP7MP2S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Steady streaming viscometry of Newtonian liquids in microfluidic devices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Gabriel Juarez, Giridar Vishwanathan","submitted_at":"2019-02-13T06:08:47Z","abstract_excerpt":"We report a novel technique capable of measuring the kinematic shear viscosity of Newtonian liquids with steady streaming in microfluidic devices. This probe-free microrheological method utilizes sub-kilohertz liquid oscillation frequencies around a cylindrical obstacle, ensuring that the inner streaming layer is comparable in size to the cylinder radius. To calibrate the viscometer, the evolution of the inner streaming layer as a function of oscillation frequency for a liquid of known viscosity is characterized using standard particle tracking techniques. Once calibrated, we show how the stea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.04758","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":"2026-05-17T23:48:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8puVdO/vkJ4Tc0sG4zB7GfW4nkpAtbNJWw+O0zLhM05pRwsb0WUiPgx+hHanu8atHe9JydbjL8pggRsUxMgtCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T06:11:05.363867Z"},"content_sha256":"7a3c180806564a7b380283d91ff1310c6e731405f9cc71d988d8a32335171a6b","schema_version":"1.0","event_id":"sha256:7a3c180806564a7b380283d91ff1310c6e731405f9cc71d988d8a32335171a6b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JZ2ULM2C27F5FNBHGZDKP7MP2S/bundle.json","state_url":"https://pith.science/pith/JZ2ULM2C27F5FNBHGZDKP7MP2S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JZ2ULM2C27F5FNBHGZDKP7MP2S/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":"2026-05-31T06:11:05Z","links":{"resolver":"https://pith.science/pith/JZ2ULM2C27F5FNBHGZDKP7MP2S","bundle":"https://pith.science/pith/JZ2ULM2C27F5FNBHGZDKP7MP2S/bundle.json","state":"https://pith.science/pith/JZ2ULM2C27F5FNBHGZDKP7MP2S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JZ2ULM2C27F5FNBHGZDKP7MP2S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:JZ2ULM2C27F5FNBHGZDKP7MP2S","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":"b6be5c31964dd7b44ec518f4bc8c398a21a63028909ebc99ed3fbda952219d86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-02-13T06:08:47Z","title_canon_sha256":"2e11661e3e3b2bb34c66fd7fba9b6e81583f4ceb8bf3ab371c87fe14e9ed29c8"},"schema_version":"1.0","source":{"id":"1902.04758","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.04758","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"arxiv_version","alias_value":"1902.04758v1","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.04758","created_at":"2026-05-17T23:48:41Z"},{"alias_kind":"pith_short_12","alias_value":"JZ2ULM2C27F5","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"JZ2ULM2C27F5FNBH","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"JZ2ULM2C","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:7a3c180806564a7b380283d91ff1310c6e731405f9cc71d988d8a32335171a6b","target":"graph","created_at":"2026-05-17T23:48:41Z","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 report a novel technique capable of measuring the kinematic shear viscosity of Newtonian liquids with steady streaming in microfluidic devices. This probe-free microrheological method utilizes sub-kilohertz liquid oscillation frequencies around a cylindrical obstacle, ensuring that the inner streaming layer is comparable in size to the cylinder radius. To calibrate the viscometer, the evolution of the inner streaming layer as a function of oscillation frequency for a liquid of known viscosity is characterized using standard particle tracking techniques. Once calibrated, we show how the stea","authors_text":"Gabriel Juarez, Giridar Vishwanathan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-02-13T06:08:47Z","title":"Steady streaming viscometry of Newtonian liquids in microfluidic devices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.04758","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:bdb74e22bbe20fb595a6a8db7502260a268b1c599bd1f92ea4395a13f3977d44","target":"record","created_at":"2026-05-17T23:48:41Z","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":"b6be5c31964dd7b44ec518f4bc8c398a21a63028909ebc99ed3fbda952219d86","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2019-02-13T06:08:47Z","title_canon_sha256":"2e11661e3e3b2bb34c66fd7fba9b6e81583f4ceb8bf3ab371c87fe14e9ed29c8"},"schema_version":"1.0","source":{"id":"1902.04758","kind":"arxiv","version":1}},"canonical_sha256":"4e7545b342d7cbd2b4273646a7fd8fd480ad4bfd230947105d80b9a3125b50a8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4e7545b342d7cbd2b4273646a7fd8fd480ad4bfd230947105d80b9a3125b50a8","first_computed_at":"2026-05-17T23:48:41.622017Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:48:41.622017Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k01AHq8ik791IrPnyQwjNMIMTh0aZW4IglSe9BC+Ofv5ESwpgGYxfLpcUwRXQpQGMFf8NFc7ZN6SHcHDd0c0BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:48:41.622468Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.04758","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bdb74e22bbe20fb595a6a8db7502260a268b1c599bd1f92ea4395a13f3977d44","sha256:7a3c180806564a7b380283d91ff1310c6e731405f9cc71d988d8a32335171a6b"],"state_sha256":"1223f1f7f63006fc7c43050272550046102443cc99fab9a2828aa93d98f72ab9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xL5B20QYHP4GyQLdra7iOVlYS8gyczPrvslTblVuSPaq07xlKx/Ql1tegADpFexMHxzP/OOkPc+sIn1+KJ7OBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T06:11:05.367448Z","bundle_sha256":"50e2d02bc46d7924a107a9eb7051b90557f5f1a187b6d72b137f9814ab3f4f18"}}