{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:XXG3EQ4AUX4RGAIRWFG6JOUR5S","short_pith_number":"pith:XXG3EQ4A","canonical_record":{"source":{"id":"1402.1120","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-02-05T18:34:01Z","cross_cats_sorted":[],"title_canon_sha256":"d42332e6b88def6473994474ebdece3f0703a3dc5f94325a173e2fc4e670d7cd","abstract_canon_sha256":"77d6dea9f52bf5b938399859ca49d5bf0e7c7d42f33a84f31f84a9610f9af5bc"},"schema_version":"1.0"},"canonical_sha256":"bdcdb24380a5f9130111b14de4ba91ecbec0efeedd0097486885684d0e342b0e","source":{"kind":"arxiv","id":"1402.1120","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.1120","created_at":"2026-05-18T02:53:39Z"},{"alias_kind":"arxiv_version","alias_value":"1402.1120v2","created_at":"2026-05-18T02:53:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.1120","created_at":"2026-05-18T02:53:39Z"},{"alias_kind":"pith_short_12","alias_value":"XXG3EQ4AUX4R","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XXG3EQ4AUX4RGAIR","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XXG3EQ4A","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:XXG3EQ4AUX4RGAIRWFG6JOUR5S","target":"record","payload":{"canonical_record":{"source":{"id":"1402.1120","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-02-05T18:34:01Z","cross_cats_sorted":[],"title_canon_sha256":"d42332e6b88def6473994474ebdece3f0703a3dc5f94325a173e2fc4e670d7cd","abstract_canon_sha256":"77d6dea9f52bf5b938399859ca49d5bf0e7c7d42f33a84f31f84a9610f9af5bc"},"schema_version":"1.0"},"canonical_sha256":"bdcdb24380a5f9130111b14de4ba91ecbec0efeedd0097486885684d0e342b0e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:53:39.771563Z","signature_b64":"bWmF19u3F+PpjleMJnTOmA0JHHZ06FdepHUI3Ek3wMvTikl+KGCTTukag/pFsJxvJGLZ92JEhDD0lxmI/D9RCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bdcdb24380a5f9130111b14de4ba91ecbec0efeedd0097486885684d0e342b0e","last_reissued_at":"2026-05-18T02:53:39.770833Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:53:39.770833Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.1120","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:53:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JMcyAcFaIfldZJlz7eEfRHXYWKTEe0Z6XuKfDT6idrJkgT/j+YPlRGESqrD5o2Fbzdv/QCUqVx0EoaXIwcAGDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:44:34.209831Z"},"content_sha256":"e8d670b5639c5a958562ab8342f0f749398a86684a12cbf7e87c7d6a38b72450","schema_version":"1.0","event_id":"sha256:e8d670b5639c5a958562ab8342f0f749398a86684a12cbf7e87c7d6a38b72450"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:XXG3EQ4AUX4RGAIRWFG6JOUR5S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Performance analysis of electronic structure codes on HPC systems: A case study of SIESTA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.comp-ph","authors_text":"Fabiano Corsetti","submitted_at":"2014-02-05T18:34:01Z","abstract_excerpt":"We report on scaling and timing tests of the SIESTA electronic structure code for ab initio molecular dynamics simulations using density-functional theory. The tests are performed on six large-scale supercomputers belonging to the PRACE Tier-0 network with four different architectures: Cray XE6, IBM BlueGene/Q, BullX, and IBM iDataPlex. We employ a systematic strategy for simultaneously testing weak and strong scaling, and propose a measure which is independent of the range of number of cores on which the tests are performed to quantify strong scaling efficiency as a function of simulation siz"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.1120","kind":"arxiv","version":2},"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":"2026-05-18T02:53:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F5m5YyvTcSh19RrYQxKDF9YLZiv/F1uiZAMfJgrv3vk/QxUbUp/5AopHDlWr+upVosonsVimLmUDDbQp1JeWAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T13:44:34.210507Z"},"content_sha256":"e6d201a23abe9f14082ca2bbc56b68415131826257222066387fce434c185012","schema_version":"1.0","event_id":"sha256:e6d201a23abe9f14082ca2bbc56b68415131826257222066387fce434c185012"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XXG3EQ4AUX4RGAIRWFG6JOUR5S/bundle.json","state_url":"https://pith.science/pith/XXG3EQ4AUX4RGAIRWFG6JOUR5S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XXG3EQ4AUX4RGAIRWFG6JOUR5S/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":"2026-05-31T13:44:34Z","links":{"resolver":"https://pith.science/pith/XXG3EQ4AUX4RGAIRWFG6JOUR5S","bundle":"https://pith.science/pith/XXG3EQ4AUX4RGAIRWFG6JOUR5S/bundle.json","state":"https://pith.science/pith/XXG3EQ4AUX4RGAIRWFG6JOUR5S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XXG3EQ4AUX4RGAIRWFG6JOUR5S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:XXG3EQ4AUX4RGAIRWFG6JOUR5S","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":"77d6dea9f52bf5b938399859ca49d5bf0e7c7d42f33a84f31f84a9610f9af5bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-02-05T18:34:01Z","title_canon_sha256":"d42332e6b88def6473994474ebdece3f0703a3dc5f94325a173e2fc4e670d7cd"},"schema_version":"1.0","source":{"id":"1402.1120","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.1120","created_at":"2026-05-18T02:53:39Z"},{"alias_kind":"arxiv_version","alias_value":"1402.1120v2","created_at":"2026-05-18T02:53:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.1120","created_at":"2026-05-18T02:53:39Z"},{"alias_kind":"pith_short_12","alias_value":"XXG3EQ4AUX4R","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"XXG3EQ4AUX4RGAIR","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"XXG3EQ4A","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:e6d201a23abe9f14082ca2bbc56b68415131826257222066387fce434c185012","target":"graph","created_at":"2026-05-18T02:53:39Z","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":"We report on scaling and timing tests of the SIESTA electronic structure code for ab initio molecular dynamics simulations using density-functional theory. The tests are performed on six large-scale supercomputers belonging to the PRACE Tier-0 network with four different architectures: Cray XE6, IBM BlueGene/Q, BullX, and IBM iDataPlex. We employ a systematic strategy for simultaneously testing weak and strong scaling, and propose a measure which is independent of the range of number of cores on which the tests are performed to quantify strong scaling efficiency as a function of simulation siz","authors_text":"Fabiano Corsetti","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-02-05T18:34:01Z","title":"Performance analysis of electronic structure codes on HPC systems: A case study of SIESTA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.1120","kind":"arxiv","version":2},"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:e8d670b5639c5a958562ab8342f0f749398a86684a12cbf7e87c7d6a38b72450","target":"record","created_at":"2026-05-18T02:53:39Z","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":"77d6dea9f52bf5b938399859ca49d5bf0e7c7d42f33a84f31f84a9610f9af5bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2014-02-05T18:34:01Z","title_canon_sha256":"d42332e6b88def6473994474ebdece3f0703a3dc5f94325a173e2fc4e670d7cd"},"schema_version":"1.0","source":{"id":"1402.1120","kind":"arxiv","version":2}},"canonical_sha256":"bdcdb24380a5f9130111b14de4ba91ecbec0efeedd0097486885684d0e342b0e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bdcdb24380a5f9130111b14de4ba91ecbec0efeedd0097486885684d0e342b0e","first_computed_at":"2026-05-18T02:53:39.770833Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:53:39.770833Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bWmF19u3F+PpjleMJnTOmA0JHHZ06FdepHUI3Ek3wMvTikl+KGCTTukag/pFsJxvJGLZ92JEhDD0lxmI/D9RCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:53:39.771563Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.1120","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e8d670b5639c5a958562ab8342f0f749398a86684a12cbf7e87c7d6a38b72450","sha256:e6d201a23abe9f14082ca2bbc56b68415131826257222066387fce434c185012"],"state_sha256":"8ec35a69412c32045454053508601ab013250595cbe4702e7916f13e13cabb42"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qMLYVLGR9RoVdAM28VTPopss3TXk8h1p8UKg6BZkZCPbQ52y0ep035UMRrdKoS3BySmIIxyeIBSy2/TAzkN+CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T13:44:34.214168Z","bundle_sha256":"c464eb6155c018232dc50ebb0e9b68fd2efb9a090d2e461b4c4850387fc767ef"}}