{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:KDXOIGJE5TSFXBTIJP3UKVZSVA","short_pith_number":"pith:KDXOIGJE","canonical_record":{"source":{"id":"2506.02034","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.GR","submitted_at":"2025-05-30T20:45:05Z","cross_cats_sorted":[],"title_canon_sha256":"d476b35d14ecb3a88e6ecdc00536b4ca23dc24f71277d654a32c09aa601ba268","abstract_canon_sha256":"6b717ea33513fdd9ee066590cffcfc83bc2f841f0e4dfd0b2c7bce5a4d6a3c29"},"schema_version":"1.0"},"canonical_sha256":"50eee41924ece45b86684bf7455732a8185d7f94444d587242ffd4fc2d32772b","source":{"kind":"arxiv","id":"2506.02034","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.02034","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"arxiv_version","alias_value":"2506.02034v1","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.02034","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"pith_short_12","alias_value":"KDXOIGJE5TSF","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"pith_short_16","alias_value":"KDXOIGJE5TSFXBTI","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"pith_short_8","alias_value":"KDXOIGJE","created_at":"2026-07-05T11:14:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:KDXOIGJE5TSFXBTIJP3UKVZSVA","target":"record","payload":{"canonical_record":{"source":{"id":"2506.02034","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.GR","submitted_at":"2025-05-30T20:45:05Z","cross_cats_sorted":[],"title_canon_sha256":"d476b35d14ecb3a88e6ecdc00536b4ca23dc24f71277d654a32c09aa601ba268","abstract_canon_sha256":"6b717ea33513fdd9ee066590cffcfc83bc2f841f0e4dfd0b2c7bce5a4d6a3c29"},"schema_version":"1.0"},"canonical_sha256":"50eee41924ece45b86684bf7455732a8185d7f94444d587242ffd4fc2d32772b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:14:31.183261Z","signature_b64":"kCg1AelaELFQ8ZeNVrBnve1dfKO8uzAwV3WQ9gSshs+4kIq7ZUEsGfiIkB3hZZZk1//CS79Zk3dhx7g9WI11BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"50eee41924ece45b86684bf7455732a8185d7f94444d587242ffd4fc2d32772b","last_reissued_at":"2026-07-05T11:14:31.182830Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:14:31.182830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.02034","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":"2026-07-05T11:14:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kWVJ3DmlhY3S4ZltDXIMyaT5rGyqIBCB9XB/MA4z7X6lIEe0XKxeywxNUe1BlEjLIoDWDkXDnZMksBgt/6cuBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T13:14:07.443715Z"},"content_sha256":"a4e95058e4a00d20fdf7d6b5fd067029e16b56b22bc2f9fc051c85f347496a2b","schema_version":"1.0","event_id":"sha256:a4e95058e4a00d20fdf7d6b5fd067029e16b56b22bc2f9fc051c85f347496a2b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:KDXOIGJE5TSFXBTIJP3UKVZSVA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-throughput viscometry via machine-learning from videos of inverted vials","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.GR","authors_text":"Abbie Kim, Connor D. Armstrong, Ignacio Arretche, Jacob J. Lessard, Mohammad Tanver Hossain, Mya G. Mills, Ramdas Tiwari, Randy H. Ewoldt, Sameh H. Tawfick","submitted_at":"2025-05-30T20:45:05Z","abstract_excerpt":"Although the inverted vial test has been widely used as a qualitative method for estimating fluid viscosity, quantitative rheological characterization has remained limited due to its complex, uncontrolled flow - driven by gravity, surface tension, inertia, and initial conditions. Here, we present a computer vision (CV) viscometer that automates the inverted vial test and enables quantitative viscosity inference across nearly five orders of magnitude (0.01-1000 Pas), without requiring direct velocity field measurements. The system simultaneously inverts multiple vials and records videos of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.02034","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2506.02034/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T11:14:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ntZt8ysc22Wb1xZdIZ/wTRhFeXpo1N9FJ//x7UjMS2G5v6foTx+DPBFTOP1fkopGr1Bo1useHxyXreAA9OCCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T13:14:07.444328Z"},"content_sha256":"eb270445d49e0c4d2838a850e5856c66ebc24b2f41fd0d42159ef40a3d0e6c67","schema_version":"1.0","event_id":"sha256:eb270445d49e0c4d2838a850e5856c66ebc24b2f41fd0d42159ef40a3d0e6c67"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KDXOIGJE5TSFXBTIJP3UKVZSVA/bundle.json","state_url":"https://pith.science/pith/KDXOIGJE5TSFXBTIJP3UKVZSVA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KDXOIGJE5TSFXBTIJP3UKVZSVA/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":"2026-08-09T13:14:07Z","links":{"resolver":"https://pith.science/pith/KDXOIGJE5TSFXBTIJP3UKVZSVA","bundle":"https://pith.science/pith/KDXOIGJE5TSFXBTIJP3UKVZSVA/bundle.json","state":"https://pith.science/pith/KDXOIGJE5TSFXBTIJP3UKVZSVA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KDXOIGJE5TSFXBTIJP3UKVZSVA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:KDXOIGJE5TSFXBTIJP3UKVZSVA","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":"6b717ea33513fdd9ee066590cffcfc83bc2f841f0e4dfd0b2c7bce5a4d6a3c29","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.GR","submitted_at":"2025-05-30T20:45:05Z","title_canon_sha256":"d476b35d14ecb3a88e6ecdc00536b4ca23dc24f71277d654a32c09aa601ba268"},"schema_version":"1.0","source":{"id":"2506.02034","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.02034","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"arxiv_version","alias_value":"2506.02034v1","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.02034","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"pith_short_12","alias_value":"KDXOIGJE5TSF","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"pith_short_16","alias_value":"KDXOIGJE5TSFXBTI","created_at":"2026-07-05T11:14:31Z"},{"alias_kind":"pith_short_8","alias_value":"KDXOIGJE","created_at":"2026-07-05T11:14:31Z"}],"graph_snapshots":[{"event_id":"sha256:eb270445d49e0c4d2838a850e5856c66ebc24b2f41fd0d42159ef40a3d0e6c67","target":"graph","created_at":"2026-07-05T11:14:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2506.02034/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Although the inverted vial test has been widely used as a qualitative method for estimating fluid viscosity, quantitative rheological characterization has remained limited due to its complex, uncontrolled flow - driven by gravity, surface tension, inertia, and initial conditions. Here, we present a computer vision (CV) viscometer that automates the inverted vial test and enables quantitative viscosity inference across nearly five orders of magnitude (0.01-1000 Pas), without requiring direct velocity field measurements. The system simultaneously inverts multiple vials and records videos of the ","authors_text":"Abbie Kim, Connor D. Armstrong, Ignacio Arretche, Jacob J. Lessard, Mohammad Tanver Hossain, Mya G. Mills, Ramdas Tiwari, Randy H. Ewoldt, Sameh H. Tawfick","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.GR","submitted_at":"2025-05-30T20:45:05Z","title":"High-throughput viscometry via machine-learning from videos of inverted vials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.02034","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:a4e95058e4a00d20fdf7d6b5fd067029e16b56b22bc2f9fc051c85f347496a2b","target":"record","created_at":"2026-07-05T11:14:31Z","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":"6b717ea33513fdd9ee066590cffcfc83bc2f841f0e4dfd0b2c7bce5a4d6a3c29","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cs.GR","submitted_at":"2025-05-30T20:45:05Z","title_canon_sha256":"d476b35d14ecb3a88e6ecdc00536b4ca23dc24f71277d654a32c09aa601ba268"},"schema_version":"1.0","source":{"id":"2506.02034","kind":"arxiv","version":1}},"canonical_sha256":"50eee41924ece45b86684bf7455732a8185d7f94444d587242ffd4fc2d32772b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"50eee41924ece45b86684bf7455732a8185d7f94444d587242ffd4fc2d32772b","first_computed_at":"2026-07-05T11:14:31.182830Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:14:31.182830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kCg1AelaELFQ8ZeNVrBnve1dfKO8uzAwV3WQ9gSshs+4kIq7ZUEsGfiIkB3hZZZk1//CS79Zk3dhx7g9WI11BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:14:31.183261Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.02034","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a4e95058e4a00d20fdf7d6b5fd067029e16b56b22bc2f9fc051c85f347496a2b","sha256:eb270445d49e0c4d2838a850e5856c66ebc24b2f41fd0d42159ef40a3d0e6c67"],"state_sha256":"022dea84e1b8165550c3ac39f938a0fdbc9f533334be3bf33f1c858bfef2224b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9LpUIKSJg6fMK5FVkm0yb3+COyvMqPMtkh+mL6+GOjPT/fNNYCoA+jnW6QzFaiAM6fQbHebFAV8iF4D9ejC2DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T13:14:07.449635Z","bundle_sha256":"ac3ecc8c1da22b83a259f7c95d79fe0917b168a08425e816821cf8d101764817"}}