{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:TC4BYODOCA3VE6WD5LYGFSOGU6","short_pith_number":"pith:TC4BYODO","schema_version":"1.0","canonical_sha256":"98b81c386e1037527ac3eaf062c9c6a7a6a3208c84b43d25638dbfcafcaca5e2","source":{"kind":"arxiv","id":"1311.1776","version":1},"attestation_state":"computed","paper":{"title":"Real-Space x-ray tomographic reconstruction of randomly oriented objects with sparse data frames","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph","physics.ins-det"],"primary_cat":"physics.data-an","authors_text":"Hugh T. Philipp, Kartik Ayyer, Mark W. Tate, Sol M. Gruner, Veit Elser","submitted_at":"2013-11-07T18:20:59Z","abstract_excerpt":"Schemes for X-ray imaging single protein molecules using new x-ray sources, like x-ray free electron lasers (XFELs), require processing many frames of data that are obtained by taking temporally short snapshots of identical molecules, each with a random and unknown orientation. Due to the small size of the molecules and short exposure times, average signal levels of much less than 1 photon/pixel/frame are expected, much too low to be processed using standard methods. One approach to process the data is to use statistical methods developed in the EMC algorithm (Loh & Elser, Phys. Rev. E, 2009) "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1311.1776","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.data-an","submitted_at":"2013-11-07T18:20:59Z","cross_cats_sorted":["physics.bio-ph","physics.ins-det"],"title_canon_sha256":"3a031f23b9b0de9a1e3ad2448373d69679a5af6125f5c415876a221eb85bb557","abstract_canon_sha256":"de36d4839f2495fb5ae675c178674249f7941ea0177e07cea544e17b3c89f1fa"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:33.156732Z","signature_b64":"itrKVjHqbhbOtdBoK33u3pAHlhMgsVVLgPKWHmAb8uN6lcxErm77nMK2Pi5UqTFZ92QJuzn/q4zKNxY+emItBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"98b81c386e1037527ac3eaf062c9c6a7a6a3208c84b43d25638dbfcafcaca5e2","last_reissued_at":"2026-05-18T01:46:33.156258Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:33.156258Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Real-Space x-ray tomographic reconstruction of randomly oriented objects with sparse data frames","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph","physics.ins-det"],"primary_cat":"physics.data-an","authors_text":"Hugh T. Philipp, Kartik Ayyer, Mark W. Tate, Sol M. Gruner, Veit Elser","submitted_at":"2013-11-07T18:20:59Z","abstract_excerpt":"Schemes for X-ray imaging single protein molecules using new x-ray sources, like x-ray free electron lasers (XFELs), require processing many frames of data that are obtained by taking temporally short snapshots of identical molecules, each with a random and unknown orientation. Due to the small size of the molecules and short exposure times, average signal levels of much less than 1 photon/pixel/frame are expected, much too low to be processed using standard methods. One approach to process the data is to use statistical methods developed in the EMC algorithm (Loh & Elser, Phys. Rev. E, 2009) "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.1776","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1311.1776","created_at":"2026-05-18T01:46:33.156356+00:00"},{"alias_kind":"arxiv_version","alias_value":"1311.1776v1","created_at":"2026-05-18T01:46:33.156356+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.1776","created_at":"2026-05-18T01:46:33.156356+00:00"},{"alias_kind":"pith_short_12","alias_value":"TC4BYODOCA3V","created_at":"2026-05-18T12:27:59.945178+00:00"},{"alias_kind":"pith_short_16","alias_value":"TC4BYODOCA3VE6WD","created_at":"2026-05-18T12:27:59.945178+00:00"},{"alias_kind":"pith_short_8","alias_value":"TC4BYODO","created_at":"2026-05-18T12:27:59.945178+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6","json":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6.json","graph_json":"https://pith.science/api/pith-number/TC4BYODOCA3VE6WD5LYGFSOGU6/graph.json","events_json":"https://pith.science/api/pith-number/TC4BYODOCA3VE6WD5LYGFSOGU6/events.json","paper":"https://pith.science/paper/TC4BYODO"},"agent_actions":{"view_html":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6","download_json":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6.json","view_paper":"https://pith.science/paper/TC4BYODO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1311.1776&json=true","fetch_graph":"https://pith.science/api/pith-number/TC4BYODOCA3VE6WD5LYGFSOGU6/graph.json","fetch_events":"https://pith.science/api/pith-number/TC4BYODOCA3VE6WD5LYGFSOGU6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6/action/storage_attestation","attest_author":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6/action/author_attestation","sign_citation":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6/action/citation_signature","submit_replication":"https://pith.science/pith/TC4BYODOCA3VE6WD5LYGFSOGU6/action/replication_record"}},"created_at":"2026-05-18T01:46:33.156356+00:00","updated_at":"2026-05-18T01:46:33.156356+00:00"}