{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:SIU6GSQZDBU77VMCNHBEF3HZ5M","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":"27e5f35999a09524937ba2a78dbc57c6a9731dab1d8a486aad461cedff5d9e46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2018-06-01T17:18:26Z","title_canon_sha256":"cac151e065aa0f249fb1a030360909c731256de37e453785777978d3284c10a1"},"schema_version":"1.0","source":{"id":"1806.00452","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.00452","created_at":"2026-05-18T00:14:23Z"},{"alias_kind":"arxiv_version","alias_value":"1806.00452v1","created_at":"2026-05-18T00:14:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.00452","created_at":"2026-05-18T00:14:23Z"},{"alias_kind":"pith_short_12","alias_value":"SIU6GSQZDBU7","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SIU6GSQZDBU77VMC","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SIU6GSQZ","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:4202496a60d252654a97f8cb4d0b61ab737b3d8818959418617f59a8eacca7e2","target":"graph","created_at":"2026-05-18T00:14:23Z","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 Lecture-Tutorials for Introductory Astronomy have been designed to help introductory astronomy instructors actively engage their students in developing their conceptual understandings and reasoning abilities across a wide range of astrophysical topics. The development of the Lecture-Tutorials has been informed by nearly two-decades of research into common learning difficulties students experience when studying astronomy. The results from multiple studies provide evidence that Lecture-Tutorials can help students achieve learning gains well beyond what is typically achieved by lecture alone.","authors_text":"Colin S. Wallace, Edward E. Prather","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2018-06-01T17:18:26Z","title":"Lecture-Tutorials in Introductory Astronomy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.00452","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":"sha256:0ba43cc7ca5c635d3467846f3facda0afa68f8ab089adf088d9298b52c855afb","target":"record","created_at":"2026-05-18T00:14:23Z","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":"27e5f35999a09524937ba2a78dbc57c6a9731dab1d8a486aad461cedff5d9e46","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2018-06-01T17:18:26Z","title_canon_sha256":"cac151e065aa0f249fb1a030360909c731256de37e453785777978d3284c10a1"},"schema_version":"1.0","source":{"id":"1806.00452","kind":"arxiv","version":1}},"canonical_sha256":"9229e34a191869ffd58269c242ecf9eb38c09de39594fa363695a1c88dfb168a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9229e34a191869ffd58269c242ecf9eb38c09de39594fa363695a1c88dfb168a","first_computed_at":"2026-05-18T00:14:23.576366Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:23.576366Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7AP/t6YhSc4zRkI4GZkiGFTwous2PZmyS2/9qlrpWV74sb90TeQ7IQPyTPHAYKK/UJzXGJR37ihqfsd9E0afAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:23.577060Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.00452","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ba43cc7ca5c635d3467846f3facda0afa68f8ab089adf088d9298b52c855afb","sha256:4202496a60d252654a97f8cb4d0b61ab737b3d8818959418617f59a8eacca7e2"],"state_sha256":"e16bc9e08df82d41b5ca0cc3f0ee0992354ad68b8995dc6424e3dc3dd7c81892"}