{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:5JDRUWBTWHKRHJMQCGMHMSBKW5","short_pith_number":"pith:5JDRUWBT","canonical_record":{"source":{"id":"2004.02833","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2020-04-06T17:25:55Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"d8101b58e3528b02d11885ad86f6bc38392fb4d6f64f16c0ff9c887345a3dbc4","abstract_canon_sha256":"2a591d32195e547540bd5f1dc12ae9735d60aa1d96f31c335b50e38536453af2"},"schema_version":"1.0"},"canonical_sha256":"ea471a5833b1d513a590119876482ab7765d8a3f2aa44a7a32ea8a30ee12f495","source":{"kind":"arxiv","id":"2004.02833","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.02833","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"arxiv_version","alias_value":"2004.02833v1","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.02833","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"pith_short_12","alias_value":"5JDRUWBTWHKR","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"pith_short_16","alias_value":"5JDRUWBTWHKRHJMQ","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"pith_short_8","alias_value":"5JDRUWBT","created_at":"2026-07-05T00:53:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:5JDRUWBTWHKRHJMQCGMHMSBKW5","target":"record","payload":{"canonical_record":{"source":{"id":"2004.02833","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2020-04-06T17:25:55Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"d8101b58e3528b02d11885ad86f6bc38392fb4d6f64f16c0ff9c887345a3dbc4","abstract_canon_sha256":"2a591d32195e547540bd5f1dc12ae9735d60aa1d96f31c335b50e38536453af2"},"schema_version":"1.0"},"canonical_sha256":"ea471a5833b1d513a590119876482ab7765d8a3f2aa44a7a32ea8a30ee12f495","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:53:03.267860Z","signature_b64":"bZ7rO5d7sDRmk/QoUl4zIRPD6e2DWApTTT7Egkahz+uWsQsqNuG938bXkKcis8QzLrOZD34GE/19rIHE28BWBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ea471a5833b1d513a590119876482ab7765d8a3f2aa44a7a32ea8a30ee12f495","last_reissued_at":"2026-07-05T00:53:03.267394Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:53:03.267394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2004.02833","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":"2026-07-05T00:53:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bj2GyU0tERI5EKJSh0NmMxD4wLiMHGIN9RYl1dVCALqd/sLXpwS18BTD+g+DqZukc6u3h0VZJld0jBuMtRaVCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:28:23.117474Z"},"content_sha256":"9cb1d7da0f93424542b17b19e76171b2398acb89407feae6c00e08168f524f89","schema_version":"1.0","event_id":"sha256:9cb1d7da0f93424542b17b19e76171b2398acb89407feae6c00e08168f524f89"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:5JDRUWBTWHKRHJMQCGMHMSBKW5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Massively Parallel Stencil Strategies for Radiation Transport Moment Model Simulations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.DC"],"primary_cat":"physics.comp-ph","authors_text":"Benjamin Seibold, Marco Berghoff, Martin Frank","submitted_at":"2020-04-06T17:25:55Z","abstract_excerpt":"The radiation transport equation is a mesoscopic equation in high dimensional phase space. Moment methods approximate it via a system of partial differential equations in traditional space-time. One challenge is the high computational intensity due to large vector sizes (1600 components for P39) in each spatial grid point. In this work, we extend the calculable domain size in 3D simulations considerably, by implementing the StaRMAP methodology within the massively parallel HPC framework NAStJA, which is designed to use current supercomputers efficiently. We apply several optimization technique"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.02833","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2004.02833/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:53:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3xIbLafqkWFg3a2aC6uVm//fNPmNAR93Wk9iKI8cdZxx8p2xXEzi1bQleyB6vcY9NMwlTqie708wH1WStPXPAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:28:23.118082Z"},"content_sha256":"fe30de9ae692d5dea309e04d087c14162908173c1dde7cd389bef9513c639f21","schema_version":"1.0","event_id":"sha256:fe30de9ae692d5dea309e04d087c14162908173c1dde7cd389bef9513c639f21"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5JDRUWBTWHKRHJMQCGMHMSBKW5/bundle.json","state_url":"https://pith.science/pith/5JDRUWBTWHKRHJMQCGMHMSBKW5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5JDRUWBTWHKRHJMQCGMHMSBKW5/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":"2026-08-03T17:28:23Z","links":{"resolver":"https://pith.science/pith/5JDRUWBTWHKRHJMQCGMHMSBKW5","bundle":"https://pith.science/pith/5JDRUWBTWHKRHJMQCGMHMSBKW5/bundle.json","state":"https://pith.science/pith/5JDRUWBTWHKRHJMQCGMHMSBKW5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5JDRUWBTWHKRHJMQCGMHMSBKW5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:5JDRUWBTWHKRHJMQCGMHMSBKW5","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":"2a591d32195e547540bd5f1dc12ae9735d60aa1d96f31c335b50e38536453af2","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2020-04-06T17:25:55Z","title_canon_sha256":"d8101b58e3528b02d11885ad86f6bc38392fb4d6f64f16c0ff9c887345a3dbc4"},"schema_version":"1.0","source":{"id":"2004.02833","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2004.02833","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"arxiv_version","alias_value":"2004.02833v1","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2004.02833","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"pith_short_12","alias_value":"5JDRUWBTWHKR","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"pith_short_16","alias_value":"5JDRUWBTWHKRHJMQ","created_at":"2026-07-05T00:53:03Z"},{"alias_kind":"pith_short_8","alias_value":"5JDRUWBT","created_at":"2026-07-05T00:53:03Z"}],"graph_snapshots":[{"event_id":"sha256:fe30de9ae692d5dea309e04d087c14162908173c1dde7cd389bef9513c639f21","target":"graph","created_at":"2026-07-05T00:53:03Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2004.02833/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The radiation transport equation is a mesoscopic equation in high dimensional phase space. Moment methods approximate it via a system of partial differential equations in traditional space-time. One challenge is the high computational intensity due to large vector sizes (1600 components for P39) in each spatial grid point. In this work, we extend the calculable domain size in 3D simulations considerably, by implementing the StaRMAP methodology within the massively parallel HPC framework NAStJA, which is designed to use current supercomputers efficiently. We apply several optimization technique","authors_text":"Benjamin Seibold, Marco Berghoff, Martin Frank","cross_cats":["cs.DC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2020-04-06T17:25:55Z","title":"Massively Parallel Stencil Strategies for Radiation Transport Moment Model Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.02833","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":"sha256:9cb1d7da0f93424542b17b19e76171b2398acb89407feae6c00e08168f524f89","target":"record","created_at":"2026-07-05T00:53:03Z","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":"2a591d32195e547540bd5f1dc12ae9735d60aa1d96f31c335b50e38536453af2","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2020-04-06T17:25:55Z","title_canon_sha256":"d8101b58e3528b02d11885ad86f6bc38392fb4d6f64f16c0ff9c887345a3dbc4"},"schema_version":"1.0","source":{"id":"2004.02833","kind":"arxiv","version":1}},"canonical_sha256":"ea471a5833b1d513a590119876482ab7765d8a3f2aa44a7a32ea8a30ee12f495","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ea471a5833b1d513a590119876482ab7765d8a3f2aa44a7a32ea8a30ee12f495","first_computed_at":"2026-07-05T00:53:03.267394Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:53:03.267394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bZ7rO5d7sDRmk/QoUl4zIRPD6e2DWApTTT7Egkahz+uWsQsqNuG938bXkKcis8QzLrOZD34GE/19rIHE28BWBw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:53:03.267860Z","signed_message":"canonical_sha256_bytes"},"source_id":"2004.02833","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9cb1d7da0f93424542b17b19e76171b2398acb89407feae6c00e08168f524f89","sha256:fe30de9ae692d5dea309e04d087c14162908173c1dde7cd389bef9513c639f21"],"state_sha256":"0e776209a639b7660c816f1993bfad662491ede7d39efe4d87d3d5b6f8302583"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wJ2QGM1QVKvRqV8coZ57ACfg+zN4IBWhx7Owts1oEyN/NoHpks5boFxalHJnBtG9+bQLTplT5+6sC938CjF0Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:28:23.123175Z","bundle_sha256":"5c9bb8ebc5e7de58a4962b8b6a5966e0c1c876205da15df616319559869ee600"}}