{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:G5IAPUB4ZIDYCQORHO7JPAUGF6","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":"7b26dfce7d4a14fdcd071035cf766d97e90ddc23accae50ceece09ca264f8e1a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-07T16:28:44Z","title_canon_sha256":"e682f9d71f2a0acd487690bc2cd05900c3e05930d9a34eb0421dc3835e75987c"},"schema_version":"1.0","source":{"id":"1610.02341","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.02341","created_at":"2026-05-18T00:55:40Z"},{"alias_kind":"arxiv_version","alias_value":"1610.02341v1","created_at":"2026-05-18T00:55:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.02341","created_at":"2026-05-18T00:55:40Z"},{"alias_kind":"pith_short_12","alias_value":"G5IAPUB4ZIDY","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"G5IAPUB4ZIDYCQOR","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"G5IAPUB4","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:ddd67501fc8ad9b26a8b04f38b636fb6354aa04be4fc0fbe6610d518e767186e","target":"graph","created_at":"2026-05-18T00:55:40Z","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":"The application of artificial neural networks (ANNs) for the estimation of HI gas mass fraction (\\fgas) is investigated, based on a sample of 13,674 galaxies in the Sloan Digital Sky Survey (SDSS) with HI detections or upper limits from the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA). We show that, for an example set of fixed input parameters ($g-r$ colour and $i$-band surface brightness), a multidimensional quadratic model yields \\fgas\\ scaling relations with a smaller scatter (0.22 dex) than traditional linear fits (0.32 dex), demonstrating that non-linear methods can lead to an ","authors_text":"David R. Patton, Hossen Teimoorinia, Sara L. Ellison","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-07T16:28:44Z","title":"Pattern recognition in the ALFALFA.70 and Sloan Digital Sky Surveys: A catalog of $\\sim$ 500,000 HI gas fraction estimates based on artificial neural networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.02341","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":"sha256:3d35f26d536f01c506592a3995ccabda16c0391d226c5b5634c408982e188b76","target":"record","created_at":"2026-05-18T00:55:40Z","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":"7b26dfce7d4a14fdcd071035cf766d97e90ddc23accae50ceece09ca264f8e1a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-07T16:28:44Z","title_canon_sha256":"e682f9d71f2a0acd487690bc2cd05900c3e05930d9a34eb0421dc3835e75987c"},"schema_version":"1.0","source":{"id":"1610.02341","kind":"arxiv","version":1}},"canonical_sha256":"375007d03cca078141d13bbe9782862fbe3f1278aab6fe47ff7b5ec4c714d71a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"375007d03cca078141d13bbe9782862fbe3f1278aab6fe47ff7b5ec4c714d71a","first_computed_at":"2026-05-18T00:55:40.914701Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:40.914701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j4kUI09uETkOmS0xieBIuLvdfTpDYdgTOKTmMCikzOXTO0U+irtkIenR0DIA2kjELrmd1SaK4wGSvatt3KMDAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:40.915147Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.02341","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d35f26d536f01c506592a3995ccabda16c0391d226c5b5634c408982e188b76","sha256:ddd67501fc8ad9b26a8b04f38b636fb6354aa04be4fc0fbe6610d518e767186e"],"state_sha256":"c7768740fd3f3dbb91fc503a6e8af72b341a4c9eafb2e561247f52711eb4b021"}