{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:UEE7HRFGJCY62PB5QIHTYF7TZB","short_pith_number":"pith:UEE7HRFG","canonical_record":{"source":{"id":"1005.5301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-28T14:44:32Z","cross_cats_sorted":[],"title_canon_sha256":"3a0197233d0fcc8cf15ba1969bd99a2199cd46651fb21cd9a6ffdd11511fd889","abstract_canon_sha256":"0465441ce412bb354a3f970bdfe38dfbf7fab246b6ff3e94c6c5d0c45651174b"},"schema_version":"1.0"},"canonical_sha256":"a109f3c4a648b1ed3c3d820f3c17f3c85e4c7c6205a4a2d6a90b029d332e9fb5","source":{"kind":"arxiv","id":"1005.5301","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.5301","created_at":"2026-05-18T04:38:16Z"},{"alias_kind":"arxiv_version","alias_value":"1005.5301v1","created_at":"2026-05-18T04:38:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.5301","created_at":"2026-05-18T04:38:16Z"},{"alias_kind":"pith_short_12","alias_value":"UEE7HRFGJCY6","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"UEE7HRFGJCY62PB5","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"UEE7HRFG","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:UEE7HRFGJCY62PB5QIHTYF7TZB","target":"record","payload":{"canonical_record":{"source":{"id":"1005.5301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-28T14:44:32Z","cross_cats_sorted":[],"title_canon_sha256":"3a0197233d0fcc8cf15ba1969bd99a2199cd46651fb21cd9a6ffdd11511fd889","abstract_canon_sha256":"0465441ce412bb354a3f970bdfe38dfbf7fab246b6ff3e94c6c5d0c45651174b"},"schema_version":"1.0"},"canonical_sha256":"a109f3c4a648b1ed3c3d820f3c17f3c85e4c7c6205a4a2d6a90b029d332e9fb5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:38:16.982185Z","signature_b64":"WQYTMqKVaXwvVJ7RQguWHaDZJqGIij8EiW6fit0Q6Ozk/v7eTNgYVZaeu6Js9BkBXgEYB0W0LmNoY6oaQx9pCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a109f3c4a648b1ed3c3d820f3c17f3c85e4c7c6205a4a2d6a90b029d332e9fb5","last_reissued_at":"2026-05-18T04:38:16.981625Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:38:16.981625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1005.5301","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:38:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"feD9h9y+GlwkynYp+BybA+RLI9UPeMbMxWr0eq6lEkZYCAi6FulXryVbMs0GQ1nHKiovN2LLPeLUSX/6UpJvCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T16:32:33.149242Z"},"content_sha256":"83add43a86282c8a83d25c4af814a906733a4ac13dfb0e784bc66f9c3dd702c2","schema_version":"1.0","event_id":"sha256:83add43a86282c8a83d25c4af814a906733a4ac13dfb0e784bc66f9c3dd702c2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:UEE7HRFGJCY62PB5QIHTYF7TZB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A high-order public domain code for direct numerical simulations of turbulent combustion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Brandenburg (NORDITA), N. Babkovskaia (University of Helsinki), N. E. L. Haugen (SINTEF)","submitted_at":"2010-05-28T14:44:32Z","abstract_excerpt":"A high-order scheme for direct numerical simulations of turbulent combustion is discussed. Its implementation in the massively parallel and publicly available Pencil Code is validated with the focus on hydrogen combustion. Ignition delay times (0D) and laminar flame velocities (1D) are calculated and compared with results from the commercially available Chemkin code. The scheme is verified to be fifth order in space. Upon doubling the resolution, a 32-fold increase in the accuracy of the flame front is demonstrated. Finally, also turbulent and spherical flame front velocities are calculated an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.5301","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:38:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cSFpWw9mAT/aEiyVgTWpnHwQxdNk6Yuci3MB2AjAH+dvdEi7fcKPMqtnrWl1MpF0Fbl/ndUQGdLgx0DD1oj/Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T16:32:33.149604Z"},"content_sha256":"a2d31e186e9315240aa49f2bff6b04c85f2f26a03bddd474f99b48e9cd894ec4","schema_version":"1.0","event_id":"sha256:a2d31e186e9315240aa49f2bff6b04c85f2f26a03bddd474f99b48e9cd894ec4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UEE7HRFGJCY62PB5QIHTYF7TZB/bundle.json","state_url":"https://pith.science/pith/UEE7HRFGJCY62PB5QIHTYF7TZB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UEE7HRFGJCY62PB5QIHTYF7TZB/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-27T16:32:33Z","links":{"resolver":"https://pith.science/pith/UEE7HRFGJCY62PB5QIHTYF7TZB","bundle":"https://pith.science/pith/UEE7HRFGJCY62PB5QIHTYF7TZB/bundle.json","state":"https://pith.science/pith/UEE7HRFGJCY62PB5QIHTYF7TZB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UEE7HRFGJCY62PB5QIHTYF7TZB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:UEE7HRFGJCY62PB5QIHTYF7TZB","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":"0465441ce412bb354a3f970bdfe38dfbf7fab246b6ff3e94c6c5d0c45651174b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-28T14:44:32Z","title_canon_sha256":"3a0197233d0fcc8cf15ba1969bd99a2199cd46651fb21cd9a6ffdd11511fd889"},"schema_version":"1.0","source":{"id":"1005.5301","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.5301","created_at":"2026-05-18T04:38:16Z"},{"alias_kind":"arxiv_version","alias_value":"1005.5301v1","created_at":"2026-05-18T04:38:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.5301","created_at":"2026-05-18T04:38:16Z"},{"alias_kind":"pith_short_12","alias_value":"UEE7HRFGJCY6","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"UEE7HRFGJCY62PB5","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"UEE7HRFG","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:a2d31e186e9315240aa49f2bff6b04c85f2f26a03bddd474f99b48e9cd894ec4","target":"graph","created_at":"2026-05-18T04:38:16Z","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":"A high-order scheme for direct numerical simulations of turbulent combustion is discussed. Its implementation in the massively parallel and publicly available Pencil Code is validated with the focus on hydrogen combustion. Ignition delay times (0D) and laminar flame velocities (1D) are calculated and compared with results from the commercially available Chemkin code. The scheme is verified to be fifth order in space. Upon doubling the resolution, a 32-fold increase in the accuracy of the flame front is demonstrated. Finally, also turbulent and spherical flame front velocities are calculated an","authors_text":"A. Brandenburg (NORDITA), N. Babkovskaia (University of Helsinki), N. E. L. Haugen (SINTEF)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-28T14:44:32Z","title":"A high-order public domain code for direct numerical simulations of turbulent combustion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.5301","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":"sha256:83add43a86282c8a83d25c4af814a906733a4ac13dfb0e784bc66f9c3dd702c2","target":"record","created_at":"2026-05-18T04:38:16Z","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":"0465441ce412bb354a3f970bdfe38dfbf7fab246b6ff3e94c6c5d0c45651174b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2010-05-28T14:44:32Z","title_canon_sha256":"3a0197233d0fcc8cf15ba1969bd99a2199cd46651fb21cd9a6ffdd11511fd889"},"schema_version":"1.0","source":{"id":"1005.5301","kind":"arxiv","version":1}},"canonical_sha256":"a109f3c4a648b1ed3c3d820f3c17f3c85e4c7c6205a4a2d6a90b029d332e9fb5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a109f3c4a648b1ed3c3d820f3c17f3c85e4c7c6205a4a2d6a90b029d332e9fb5","first_computed_at":"2026-05-18T04:38:16.981625Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:38:16.981625Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WQYTMqKVaXwvVJ7RQguWHaDZJqGIij8EiW6fit0Q6Ozk/v7eTNgYVZaeu6Js9BkBXgEYB0W0LmNoY6oaQx9pCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:38:16.982185Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.5301","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:83add43a86282c8a83d25c4af814a906733a4ac13dfb0e784bc66f9c3dd702c2","sha256:a2d31e186e9315240aa49f2bff6b04c85f2f26a03bddd474f99b48e9cd894ec4"],"state_sha256":"ffa844f4cf4d7529240de9a0c05b9bc26cb1a0b2c3db5c4d734133b609e63905"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bP5rXYidshFhUtwRQ0fJllGwDfcdggxg+8JjT1LKrLZDp3pVRsoA+qiOgcfnsh47z9IpJJK5e5ijlIS9lEF6BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T16:32:33.151468Z","bundle_sha256":"86e9ffc0330ce25dc337b5b454b55632d24cbbf5eee8b608b163b38e37238e30"}}