{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:QRPREGCLXS6D4434AP73PSZNU2","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":"fde9e703f636557764e5d293d58837fbf3d9a96544568df57ba9347146c61a5f","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-11-15T13:48:26Z","title_canon_sha256":"db2ed7f5fc0c57e9a3a0a81b98f650da9970d3bd2145922b65125060b843f836"},"schema_version":"1.0","source":{"id":"1611.04826","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.04826","created_at":"2026-05-18T00:58:49Z"},{"alias_kind":"arxiv_version","alias_value":"1611.04826v1","created_at":"2026-05-18T00:58:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.04826","created_at":"2026-05-18T00:58:49Z"},{"alias_kind":"pith_short_12","alias_value":"QRPREGCLXS6D","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"QRPREGCLXS6D4434","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"QRPREGCL","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:51ef3b772a8fa8bc4fd1b7fdca4799ed2364dda09df95fc42627f53a6be4029e","target":"graph","created_at":"2026-05-18T00:58:49Z","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":"This work presents an experimental design for studying low-velocity collisions into granular surfaces in low-gravity. In the experiment apparatus, reduced-gravity is simulated by releasing a free-falling projectile into a surface container with a downward acceleration less than that of Earth's gravity. The acceleration of the surface is controlled through the use of an Atwood machine, or a system of pulleys and counterweights. The starting height of the surface container and the initial separation distance between the projectile and surface are variable and chosen to accommodate collision velo","authors_text":"Cecily Sunday, Claudia Valeria Nardi, David Mimoun, Iris Avila Martinez, Naomi Murdoch, Olivier Cherrier, Sara Morales Serrano, Tristan Janin, Yves Gourinat","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-11-15T13:48:26Z","title":"A novel facility for reduced-gravity testing: a set-up for studying low-velocity collisions into granular surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.04826","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:dd3d8f101e0920d0104f9f57dcf99fc5f829c01b73ca828a061cc75906d111d6","target":"record","created_at":"2026-05-18T00:58:49Z","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":"fde9e703f636557764e5d293d58837fbf3d9a96544568df57ba9347146c61a5f","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2016-11-15T13:48:26Z","title_canon_sha256":"db2ed7f5fc0c57e9a3a0a81b98f650da9970d3bd2145922b65125060b843f836"},"schema_version":"1.0","source":{"id":"1611.04826","kind":"arxiv","version":1}},"canonical_sha256":"845f12184bbcbc3e737c03ffb7cb2da69542bf1f78c02ae40d5870906b1d4918","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"845f12184bbcbc3e737c03ffb7cb2da69542bf1f78c02ae40d5870906b1d4918","first_computed_at":"2026-05-18T00:58:49.764151Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:49.764151Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Bz8NR3g5XqxuV3x2TrKXxRo8jHcH7+v5QvvV0UPhAWuaIlmNOM4PgH+kEoZ8BMAiMstiOssB2CslkAvRlsQSDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:49.764805Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.04826","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dd3d8f101e0920d0104f9f57dcf99fc5f829c01b73ca828a061cc75906d111d6","sha256:51ef3b772a8fa8bc4fd1b7fdca4799ed2364dda09df95fc42627f53a6be4029e"],"state_sha256":"c41c0d416e63dfc8b91f6346e272d647702e61ec6df37884e70f700e17eb1802"}