{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:Q4KM5RUOY2DNJCL5ST55RTTHOF","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":"2b4d26e57d78767943bb0c6ad87344fa446daff347fa51391021e65c58e623c7","cross_cats_sorted":["cond-mat.soft","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-05-17T11:20:37Z","title_canon_sha256":"fd712d8ecc932990840139648b2cae9d4d906b8f4c98d681e8b94e3f6a0f9587"},"schema_version":"1.0","source":{"id":"1005.2884","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.2884","created_at":"2026-05-18T02:07:18Z"},{"alias_kind":"arxiv_version","alias_value":"1005.2884v1","created_at":"2026-05-18T02:07:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.2884","created_at":"2026-05-18T02:07:18Z"},{"alias_kind":"pith_short_12","alias_value":"Q4KM5RUOY2DN","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"Q4KM5RUOY2DNJCL5","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"Q4KM5RUO","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:dc645129a6e2afaf34cb8436ffa807790ebaa1960103f026f660dec7d1a8e252","target":"graph","created_at":"2026-05-18T02:07:18Z","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 experimentally demonstrate that the flow rate of granular material through an aperture is controlled by the exit velocity imposed to the particles and not by the pressure at the base, contrary to what is often assumed in previous works. This result is achieved by studying the discharge process of a dense packing of monosized disks through an orifice. The flow is driven by a conveyor belt. This two-dimensional horizontal setup allows to uncouple pressure and velocity and, therefore, to independently control the velocity at which the disks escape the horizontal silo and the pressure in the vi","authors_text":"Adriana Calvo (GMP), Jean-Christophe G\\'eminard (Phys-ENS), Juan G. Grande (GMP), Luis A. Pugnaloni (IFLySyB), Maria Alejandra Aguirre (GMP)","cross_cats":["cond-mat.soft","physics.flu-dyn"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-05-17T11:20:37Z","title":"Pressure independence of granular flow through an aperture"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.2884","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:c1f279af78bb5c84e0def4418dbb0a3c9289dcabf90c8a66a6ec0babdc33f713","target":"record","created_at":"2026-05-18T02:07:18Z","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":"2b4d26e57d78767943bb0c6ad87344fa446daff347fa51391021e65c58e623c7","cross_cats_sorted":["cond-mat.soft","physics.flu-dyn"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-05-17T11:20:37Z","title_canon_sha256":"fd712d8ecc932990840139648b2cae9d4d906b8f4c98d681e8b94e3f6a0f9587"},"schema_version":"1.0","source":{"id":"1005.2884","kind":"arxiv","version":1}},"canonical_sha256":"8714cec68ec686d4897d94fbd8ce67716f9798b0e2ef9b16b0b4f79dcbdfa19f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8714cec68ec686d4897d94fbd8ce67716f9798b0e2ef9b16b0b4f79dcbdfa19f","first_computed_at":"2026-05-18T02:07:18.297796Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:18.297796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lWO2YS+9s2nuYB/zzPpqULwcI/+zszl85OpLRdpPONYckJOpAtj2n50JITtHqbsg1vQVXnS+PEZR1U6sz5KBDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:18.298258Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.2884","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c1f279af78bb5c84e0def4418dbb0a3c9289dcabf90c8a66a6ec0babdc33f713","sha256:dc645129a6e2afaf34cb8436ffa807790ebaa1960103f026f660dec7d1a8e252"],"state_sha256":"6cfeb84cb3f423d9ce71eeaac3b1fe3e2ea08b75cf90141eaca137185045367d"}