{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:WU3Y25FU3NKLTTJR5CXEZVNZN4","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":"37ea6ae54d01b8f2b245aa669deb8ab32868f275f9ec6d21a44600a11aeee24d","cross_cats_sorted":["cond-mat.stat-mech","q-bio.CB"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2019-05-19T17:02:34Z","title_canon_sha256":"380ea59e3c9fba0cad30cc93b6fd6110df5e20526787a2ed34ac326de4b88017"},"schema_version":"1.0","source":{"id":"1905.07774","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.07774","created_at":"2026-05-17T23:45:48Z"},{"alias_kind":"arxiv_version","alias_value":"1905.07774v1","created_at":"2026-05-17T23:45:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.07774","created_at":"2026-05-17T23:45:48Z"},{"alias_kind":"pith_short_12","alias_value":"WU3Y25FU3NKL","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"WU3Y25FU3NKLTTJR","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"WU3Y25FU","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:1fbaeb4463a3f85927a54936ec2d6f6e8fe7cf5622acbfa898a9f001508b2497","target":"graph","created_at":"2026-05-17T23:45:48Z","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":"Ephemeral aggregations of bacteria are ubiquitous in the environment, where they serve as hotbeds of metabolic activity, nutrient cycling, and horizontal gene transfer. In many cases, these regions of high bacterial concentration are thought to form when motile cells use chemotaxis to navigate to chemical hotspots. However, what governs the dynamics of bacterial aggregations is unclear. Here, we use a novel experimental platform to create realistic sub-millimeter scale nutrient pulses with controlled nutrient concentrations. By combining experiments, mathematical theory and agent-based simulat","authors_text":"Andrew M. Hein, Douglas R. Brumley, Francesco Carrara, Roman Stocker, Simon A. Levin, Yutaka Yawata","cross_cats":["cond-mat.stat-mech","q-bio.CB"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2019-05-19T17:02:34Z","title":"Bacteria push the limits of chemotactic precision to navigate dynamic chemical gradients"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.07774","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":"sha256:512404d5322eb10ac57180f1563a6618963260873a67626b900f97d6adc067ff","target":"record","created_at":"2026-05-17T23:45:48Z","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":"37ea6ae54d01b8f2b245aa669deb8ab32868f275f9ec6d21a44600a11aeee24d","cross_cats_sorted":["cond-mat.stat-mech","q-bio.CB"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.bio-ph","submitted_at":"2019-05-19T17:02:34Z","title_canon_sha256":"380ea59e3c9fba0cad30cc93b6fd6110df5e20526787a2ed34ac326de4b88017"},"schema_version":"1.0","source":{"id":"1905.07774","kind":"arxiv","version":1}},"canonical_sha256":"b5378d74b4db54b9cd31e8ae4cd5b96f0ab5ac124c081666890ae6ede4d3977a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b5378d74b4db54b9cd31e8ae4cd5b96f0ab5ac124c081666890ae6ede4d3977a","first_computed_at":"2026-05-17T23:45:48.528921Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:48.528921Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wVIKbRteMlNg1fKowL4YUYTlDy2iq+SLcU0Clvc+pCxxRK18LDI5M3sRk3/H32kGWKwm/z2tUmgw87wQ0ylUCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:48.529610Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.07774","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:512404d5322eb10ac57180f1563a6618963260873a67626b900f97d6adc067ff","sha256:1fbaeb4463a3f85927a54936ec2d6f6e8fe7cf5622acbfa898a9f001508b2497"],"state_sha256":"6e3e8572e204a2307c4385f3b4842dcaf5bcbe3e3c27851b9c4fb637670b8b53"}