{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:HBC3N7LGCQWXNVSLVNWNNH5BRH","short_pith_number":"pith:HBC3N7LG","canonical_record":{"source":{"id":"1104.3516","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2011-04-18T15:21:18Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"4cf84ab608726b026d5b076bdf97056388eb139671eed10050b4ac8da50f9959","abstract_canon_sha256":"120ce5bf07024c594f240df69ef4720ad3b9da197174c62ab0f23347520d79db"},"schema_version":"1.0"},"canonical_sha256":"3845b6fd66142d76d64bab6cd69fa189f1d3b9726715421c04e7a8ad0b8dce8f","source":{"kind":"arxiv","id":"1104.3516","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.3516","created_at":"2026-05-18T02:22:02Z"},{"alias_kind":"arxiv_version","alias_value":"1104.3516v2","created_at":"2026-05-18T02:22:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.3516","created_at":"2026-05-18T02:22:02Z"},{"alias_kind":"pith_short_12","alias_value":"HBC3N7LGCQWX","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HBC3N7LGCQWXNVSL","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HBC3N7LG","created_at":"2026-05-18T12:26:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:HBC3N7LGCQWXNVSLVNWNNH5BRH","target":"record","payload":{"canonical_record":{"source":{"id":"1104.3516","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2011-04-18T15:21:18Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"4cf84ab608726b026d5b076bdf97056388eb139671eed10050b4ac8da50f9959","abstract_canon_sha256":"120ce5bf07024c594f240df69ef4720ad3b9da197174c62ab0f23347520d79db"},"schema_version":"1.0"},"canonical_sha256":"3845b6fd66142d76d64bab6cd69fa189f1d3b9726715421c04e7a8ad0b8dce8f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:22:02.437047Z","signature_b64":"uTQmcb03OkKpdzMuJqY/g7wOPQSZYiDmTggYuKgZwYCxTDO/mLbVUBLbLzVz111VcqfbDKGXdJAkIDejMCKdBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3845b6fd66142d76d64bab6cd69fa189f1d3b9726715421c04e7a8ad0b8dce8f","last_reissued_at":"2026-05-18T02:22:02.436425Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:22:02.436425Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.3516","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":"2026-05-18T02:22:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rn4IcrJzHG16qKsuN6wwfFHbElk06FQTHfOx7B7+MHGoqoXjSPKYkJg2n7IEEWXjo6MOSWcUPmwhVETRSANnCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:53:50.082855Z"},"content_sha256":"df4e73c770bd21babe14ae79998d28be19df30f79a38fba0f18cf77d28a72e85","schema_version":"1.0","event_id":"sha256:df4e73c770bd21babe14ae79998d28be19df30f79a38fba0f18cf77d28a72e85"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:HBC3N7LGCQWXNVSLVNWNNH5BRH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An adaptive hierarchical domain decomposition method for parallel contact dynamics simulations of granular materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"cond-mat.soft","authors_text":"Dietrich E. Wolf, J\\'anos T\\\"or\\\"ok, Lothar Brendel, M. Reza Shaebani, Zahra Shojaaee","submitted_at":"2011-04-18T15:21:18Z","abstract_excerpt":"A fully parallel version of the contact dynamics (CD) method is presented in this paper. For large enough systems, 100% efficiency has been demonstrated for up to 256 processors using a hierarchical domain decomposition with dynamic load balancing. The iterative scheme to calculate the contact forces is left domain-wise sequential, with data exchange after each iteration step, which ensures its stability. The number of additional iterations required for convergence by the partially parallel updates at the domain boundaries becomes negligible with increasing number of particles, which allows fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.3516","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":"2026-05-18T02:22:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KXpAgPuGvgpQAyyZI97FEqq4EJa+bse2O3Ex604KUkl6XH9Zz8hnDwNifVb1tEo7VLQClsqOYuQXZKngRp73Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:53:50.083195Z"},"content_sha256":"a257d1b71fcae475ce77bebbd9a1872a84655d147e390b59c75521561cae41f5","schema_version":"1.0","event_id":"sha256:a257d1b71fcae475ce77bebbd9a1872a84655d147e390b59c75521561cae41f5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HBC3N7LGCQWXNVSLVNWNNH5BRH/bundle.json","state_url":"https://pith.science/pith/HBC3N7LGCQWXNVSLVNWNNH5BRH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HBC3N7LGCQWXNVSLVNWNNH5BRH/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":"2026-05-30T13:53:50Z","links":{"resolver":"https://pith.science/pith/HBC3N7LGCQWXNVSLVNWNNH5BRH","bundle":"https://pith.science/pith/HBC3N7LGCQWXNVSLVNWNNH5BRH/bundle.json","state":"https://pith.science/pith/HBC3N7LGCQWXNVSLVNWNNH5BRH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HBC3N7LGCQWXNVSLVNWNNH5BRH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:HBC3N7LGCQWXNVSLVNWNNH5BRH","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":"120ce5bf07024c594f240df69ef4720ad3b9da197174c62ab0f23347520d79db","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2011-04-18T15:21:18Z","title_canon_sha256":"4cf84ab608726b026d5b076bdf97056388eb139671eed10050b4ac8da50f9959"},"schema_version":"1.0","source":{"id":"1104.3516","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.3516","created_at":"2026-05-18T02:22:02Z"},{"alias_kind":"arxiv_version","alias_value":"1104.3516v2","created_at":"2026-05-18T02:22:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.3516","created_at":"2026-05-18T02:22:02Z"},{"alias_kind":"pith_short_12","alias_value":"HBC3N7LGCQWX","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HBC3N7LGCQWXNVSL","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HBC3N7LG","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:a257d1b71fcae475ce77bebbd9a1872a84655d147e390b59c75521561cae41f5","target":"graph","created_at":"2026-05-18T02:22:02Z","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 fully parallel version of the contact dynamics (CD) method is presented in this paper. For large enough systems, 100% efficiency has been demonstrated for up to 256 processors using a hierarchical domain decomposition with dynamic load balancing. The iterative scheme to calculate the contact forces is left domain-wise sequential, with data exchange after each iteration step, which ensures its stability. The number of additional iterations required for convergence by the partially parallel updates at the domain boundaries becomes negligible with increasing number of particles, which allows fo","authors_text":"Dietrich E. Wolf, J\\'anos T\\\"or\\\"ok, Lothar Brendel, M. Reza Shaebani, Zahra Shojaaee","cross_cats":["physics.comp-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2011-04-18T15:21:18Z","title":"An adaptive hierarchical domain decomposition method for parallel contact dynamics simulations of granular materials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.3516","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:df4e73c770bd21babe14ae79998d28be19df30f79a38fba0f18cf77d28a72e85","target":"record","created_at":"2026-05-18T02:22:02Z","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":"120ce5bf07024c594f240df69ef4720ad3b9da197174c62ab0f23347520d79db","cross_cats_sorted":["physics.comp-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2011-04-18T15:21:18Z","title_canon_sha256":"4cf84ab608726b026d5b076bdf97056388eb139671eed10050b4ac8da50f9959"},"schema_version":"1.0","source":{"id":"1104.3516","kind":"arxiv","version":2}},"canonical_sha256":"3845b6fd66142d76d64bab6cd69fa189f1d3b9726715421c04e7a8ad0b8dce8f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3845b6fd66142d76d64bab6cd69fa189f1d3b9726715421c04e7a8ad0b8dce8f","first_computed_at":"2026-05-18T02:22:02.436425Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:22:02.436425Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uTQmcb03OkKpdzMuJqY/g7wOPQSZYiDmTggYuKgZwYCxTDO/mLbVUBLbLzVz111VcqfbDKGXdJAkIDejMCKdBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:22:02.437047Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.3516","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:df4e73c770bd21babe14ae79998d28be19df30f79a38fba0f18cf77d28a72e85","sha256:a257d1b71fcae475ce77bebbd9a1872a84655d147e390b59c75521561cae41f5"],"state_sha256":"b33dc1ee875da5c22c9bbbfb0e3e6b48cd98f416736abb4b9288a4d9b97304a6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QtGaCAvIstnUWZh88E4yR75fzqOW0Zw6bK2V22/Z5s/W5Xtn+OdtL096Ca0ao57b6Z+O8WMyLam9vaWOdCwNCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T13:53:50.085447Z","bundle_sha256":"d3cc754fb4c96771cfc784bbf06ac60e5de19d7904f209d6ceca63c1fa4d37fe"}}