{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:QI7ZPPILXUH375GEE3J3FPMZRO","short_pith_number":"pith:QI7ZPPIL","canonical_record":{"source":{"id":"2507.13851","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2025-07-18T12:10:27Z","cross_cats_sorted":[],"title_canon_sha256":"2065a31e28816f5a40a77fa855414d7f4be69aaf85d4f4282a401f7e05764d37","abstract_canon_sha256":"82c130cebe60718b167451f9a0e9f565ef755f7c4a51245a2d2b8f50aa91d3e3"},"schema_version":"1.0"},"canonical_sha256":"823f97bd0bbd0fbff4c426d3b2bd998b84851fa652cdb1d29822b6abb2b703b0","source":{"kind":"arxiv","id":"2507.13851","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.13851","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"arxiv_version","alias_value":"2507.13851v1","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.13851","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"pith_short_12","alias_value":"QI7ZPPILXUH3","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"pith_short_16","alias_value":"QI7ZPPILXUH375GE","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"pith_short_8","alias_value":"QI7ZPPIL","created_at":"2026-07-05T11:39:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:QI7ZPPILXUH375GEE3J3FPMZRO","target":"record","payload":{"canonical_record":{"source":{"id":"2507.13851","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2025-07-18T12:10:27Z","cross_cats_sorted":[],"title_canon_sha256":"2065a31e28816f5a40a77fa855414d7f4be69aaf85d4f4282a401f7e05764d37","abstract_canon_sha256":"82c130cebe60718b167451f9a0e9f565ef755f7c4a51245a2d2b8f50aa91d3e3"},"schema_version":"1.0"},"canonical_sha256":"823f97bd0bbd0fbff4c426d3b2bd998b84851fa652cdb1d29822b6abb2b703b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:39:24.420802Z","signature_b64":"m28rekRLtt3SLaX7D7C/RTes7I+VTKK0DG+A+p4f1xw8K9GXlQQI9eqhyqUXzuO1sdj+QxE007cNqwlgGbdtCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"823f97bd0bbd0fbff4c426d3b2bd998b84851fa652cdb1d29822b6abb2b703b0","last_reissued_at":"2026-07-05T11:39:24.420285Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:39:24.420285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.13851","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":"2026-07-05T11:39:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2xOVf3gSh/9saqckeEjKLTp65+i27cSkIEgFstiY9jzAHntrKQ+w9IbtE1qQWlddnGK7IxzR3Wxsah/MKRsJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T21:04:57.609074Z"},"content_sha256":"785fb13e5b582ea10cce89134d34063d025cf99a65cca47719b7a83806f6988a","schema_version":"1.0","event_id":"sha256:785fb13e5b582ea10cce89134d34063d025cf99a65cca47719b7a83806f6988a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:QI7ZPPILXUH375GEE3J3FPMZRO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Driven shear flow in biological magneto-active fluids","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Andrejs Cebers, C\\'ecile Cottin-Bizonne, Christophe Ybert, Damien Faivre, Malo Marmol","submitted_at":"2025-07-18T12:10:27Z","abstract_excerpt":"Active fluids made of powered suspended particles have unique abilities to self-generate flow and density structures. How such dynamics can be triggered and leveraged by external cues is a key question of both biological and applied relevance. Here we use magnetotactic bacteria to explore how chemotaxis and magnetotaxis -- leading, respectively, to positional and orientational responses -- combine to generate global scale flows. Such steady regime can be quantitatively captured by a magneto-active hydrodynamic model, while time-dependent magnetic driving unveils additional patterning complexit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.13851","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/2507.13851/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":"2026-07-05T11:39:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mvv9HvymIRvjLsn0PZj2Zg8HE4EkWZpYfpACG97jEAte6T7VXeh9IZssOuXudp/eufZMEA12/6GNbA0EkXgJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T21:04:57.609467Z"},"content_sha256":"a2c9dfc9467a3704ca3de6ad49f27f2c1c0540fa84f6b035c9a4e8cbbf594a37","schema_version":"1.0","event_id":"sha256:a2c9dfc9467a3704ca3de6ad49f27f2c1c0540fa84f6b035c9a4e8cbbf594a37"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QI7ZPPILXUH375GEE3J3FPMZRO/bundle.json","state_url":"https://pith.science/pith/QI7ZPPILXUH375GEE3J3FPMZRO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QI7ZPPILXUH375GEE3J3FPMZRO/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":"2026-08-11T21:04:57Z","links":{"resolver":"https://pith.science/pith/QI7ZPPILXUH375GEE3J3FPMZRO","bundle":"https://pith.science/pith/QI7ZPPILXUH375GEE3J3FPMZRO/bundle.json","state":"https://pith.science/pith/QI7ZPPILXUH375GEE3J3FPMZRO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QI7ZPPILXUH375GEE3J3FPMZRO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:QI7ZPPILXUH375GEE3J3FPMZRO","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":"82c130cebe60718b167451f9a0e9f565ef755f7c4a51245a2d2b8f50aa91d3e3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2025-07-18T12:10:27Z","title_canon_sha256":"2065a31e28816f5a40a77fa855414d7f4be69aaf85d4f4282a401f7e05764d37"},"schema_version":"1.0","source":{"id":"2507.13851","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.13851","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"arxiv_version","alias_value":"2507.13851v1","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.13851","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"pith_short_12","alias_value":"QI7ZPPILXUH3","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"pith_short_16","alias_value":"QI7ZPPILXUH375GE","created_at":"2026-07-05T11:39:24Z"},{"alias_kind":"pith_short_8","alias_value":"QI7ZPPIL","created_at":"2026-07-05T11:39:24Z"}],"graph_snapshots":[{"event_id":"sha256:a2c9dfc9467a3704ca3de6ad49f27f2c1c0540fa84f6b035c9a4e8cbbf594a37","target":"graph","created_at":"2026-07-05T11:39:24Z","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/2507.13851/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Active fluids made of powered suspended particles have unique abilities to self-generate flow and density structures. How such dynamics can be triggered and leveraged by external cues is a key question of both biological and applied relevance. Here we use magnetotactic bacteria to explore how chemotaxis and magnetotaxis -- leading, respectively, to positional and orientational responses -- combine to generate global scale flows. Such steady regime can be quantitatively captured by a magneto-active hydrodynamic model, while time-dependent magnetic driving unveils additional patterning complexit","authors_text":"Andrejs Cebers, C\\'ecile Cottin-Bizonne, Christophe Ybert, Damien Faivre, Malo Marmol","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2025-07-18T12:10:27Z","title":"Driven shear flow in biological magneto-active fluids"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.13851","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":"sha256:785fb13e5b582ea10cce89134d34063d025cf99a65cca47719b7a83806f6988a","target":"record","created_at":"2026-07-05T11:39:24Z","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":"82c130cebe60718b167451f9a0e9f565ef755f7c4a51245a2d2b8f50aa91d3e3","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2025-07-18T12:10:27Z","title_canon_sha256":"2065a31e28816f5a40a77fa855414d7f4be69aaf85d4f4282a401f7e05764d37"},"schema_version":"1.0","source":{"id":"2507.13851","kind":"arxiv","version":1}},"canonical_sha256":"823f97bd0bbd0fbff4c426d3b2bd998b84851fa652cdb1d29822b6abb2b703b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"823f97bd0bbd0fbff4c426d3b2bd998b84851fa652cdb1d29822b6abb2b703b0","first_computed_at":"2026-07-05T11:39:24.420285Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:39:24.420285Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m28rekRLtt3SLaX7D7C/RTes7I+VTKK0DG+A+p4f1xw8K9GXlQQI9eqhyqUXzuO1sdj+QxE007cNqwlgGbdtCw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:39:24.420802Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.13851","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:785fb13e5b582ea10cce89134d34063d025cf99a65cca47719b7a83806f6988a","sha256:a2c9dfc9467a3704ca3de6ad49f27f2c1c0540fa84f6b035c9a4e8cbbf594a37"],"state_sha256":"a240c47c0c7e8463579c2c4448c5625041c69d5426430062a38fcc934f334167"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MQNr4q7HgaHky0e1vhpcDeiTNk/MtujNwpmp7VBDW4VCD3YiSm+3khf+H3ZrQmKVbQq+tDAC29f7AdHR8RSkBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T21:04:57.612177Z","bundle_sha256":"e8aba7972d4bd3ab8340698e7fe4ec8ccd30f39ab889f701ad6503370242b27d"}}