{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:QNDCMYBXXZ37GA6JBHTBHII2Y4","short_pith_number":"pith:QNDCMYBX","schema_version":"1.0","canonical_sha256":"8346266037be77f303c909e613a11ac70b2e829c2049f501a0654fc8e5604e13","source":{"kind":"arxiv","id":"1302.0788","version":1},"attestation_state":"computed","paper":{"title":"Absorption Efficiencies of Forsterite. I: DDA Explorations in Grain Shape and Size","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Charles E. Woodward, David E. Harker, Diane H. Wooden, Jim R. Murphy, Michael S. Kelley, Sean S. Lindsay","submitted_at":"2013-02-04T18:34:36Z","abstract_excerpt":"We compute the absorption efficiency (Qabs) of forsterite using the discrete dipole approximation (DDA) in order to identify and describe what characteristics of crystal grain shape and size are important to the shape, peak location, and relative strength of spectral features in the 8-40 {\\mu}m wavelength range. Using the DDSCAT code, we compute Qabs for non-spherical polyhedral grain shapes with a_eff = 0.1 {\\mu}m. The shape characteristics identified are: 1) elongation/reduction along one of three crystallographic axes; 2) asymmetry, such that all three crystallographic axes are of different"},"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":"1302.0788","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-02-04T18:34:36Z","cross_cats_sorted":[],"title_canon_sha256":"d083b69fc890eedde0e2d5d41a3bc0358a184960aa57900880d8431f348e4174","abstract_canon_sha256":"a1e402c952b6b3cbee811221d814123eef113b4357793838fa4a36942961609f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:50.683574Z","signature_b64":"4zavQbNTg5jx8yhhPz/6Sb7yBb+gWzDUhepdE3a//JN9GNi7OAzc2JcShzGpSXcaiCq4Q6vWIbOOa2nSxJj9Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8346266037be77f303c909e613a11ac70b2e829c2049f501a0654fc8e5604e13","last_reissued_at":"2026-05-18T01:51:50.683162Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:50.683162Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Absorption Efficiencies of Forsterite. I: DDA Explorations in Grain Shape and Size","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Charles E. Woodward, David E. Harker, Diane H. Wooden, Jim R. Murphy, Michael S. Kelley, Sean S. Lindsay","submitted_at":"2013-02-04T18:34:36Z","abstract_excerpt":"We compute the absorption efficiency (Qabs) of forsterite using the discrete dipole approximation (DDA) in order to identify and describe what characteristics of crystal grain shape and size are important to the shape, peak location, and relative strength of spectral features in the 8-40 {\\mu}m wavelength range. Using the DDSCAT code, we compute Qabs for non-spherical polyhedral grain shapes with a_eff = 0.1 {\\mu}m. The shape characteristics identified are: 1) elongation/reduction along one of three crystallographic axes; 2) asymmetry, such that all three crystallographic axes are of different"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.0788","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":"1302.0788","created_at":"2026-05-18T01:51:50.683227+00:00"},{"alias_kind":"arxiv_version","alias_value":"1302.0788v1","created_at":"2026-05-18T01:51:50.683227+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.0788","created_at":"2026-05-18T01:51:50.683227+00:00"},{"alias_kind":"pith_short_12","alias_value":"QNDCMYBXXZ37","created_at":"2026-05-18T12:27:57.521954+00:00"},{"alias_kind":"pith_short_16","alias_value":"QNDCMYBXXZ37GA6J","created_at":"2026-05-18T12:27:57.521954+00:00"},{"alias_kind":"pith_short_8","alias_value":"QNDCMYBX","created_at":"2026-05-18T12:27:57.521954+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/QNDCMYBXXZ37GA6JBHTBHII2Y4","json":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4.json","graph_json":"https://pith.science/api/pith-number/QNDCMYBXXZ37GA6JBHTBHII2Y4/graph.json","events_json":"https://pith.science/api/pith-number/QNDCMYBXXZ37GA6JBHTBHII2Y4/events.json","paper":"https://pith.science/paper/QNDCMYBX"},"agent_actions":{"view_html":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4","download_json":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4.json","view_paper":"https://pith.science/paper/QNDCMYBX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1302.0788&json=true","fetch_graph":"https://pith.science/api/pith-number/QNDCMYBXXZ37GA6JBHTBHII2Y4/graph.json","fetch_events":"https://pith.science/api/pith-number/QNDCMYBXXZ37GA6JBHTBHII2Y4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4/action/storage_attestation","attest_author":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4/action/author_attestation","sign_citation":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4/action/citation_signature","submit_replication":"https://pith.science/pith/QNDCMYBXXZ37GA6JBHTBHII2Y4/action/replication_record"}},"created_at":"2026-05-18T01:51:50.683227+00:00","updated_at":"2026-05-18T01:51:50.683227+00:00"}