{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:A7XTQQGVQ4JSEPCSVJKCMX3VZZ","short_pith_number":"pith:A7XTQQGV","canonical_record":{"source":{"id":"1908.03301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2019-08-09T03:57:21Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"3f6f9dd91f9fa62014e911a8e46027fce7a81e525507bd5263ae0e4555551e7b","abstract_canon_sha256":"c6f15d1261097d393ec8739b22c5596bce5f42a6fa859737985e4584323c7034"},"schema_version":"1.0"},"canonical_sha256":"07ef3840d58713223c52aa54265f75ce6e93c5af79481ac92edb982a14457621","source":{"kind":"arxiv","id":"1908.03301","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.03301","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"arxiv_version","alias_value":"1908.03301v1","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.03301","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"pith_short_12","alias_value":"A7XTQQGVQ4JS","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"pith_short_16","alias_value":"A7XTQQGVQ4JSEPCS","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"pith_short_8","alias_value":"A7XTQQGV","created_at":"2026-07-04T23:52:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:A7XTQQGVQ4JSEPCSVJKCMX3VZZ","target":"record","payload":{"canonical_record":{"source":{"id":"1908.03301","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2019-08-09T03:57:21Z","cross_cats_sorted":["cs.DC"],"title_canon_sha256":"3f6f9dd91f9fa62014e911a8e46027fce7a81e525507bd5263ae0e4555551e7b","abstract_canon_sha256":"c6f15d1261097d393ec8739b22c5596bce5f42a6fa859737985e4584323c7034"},"schema_version":"1.0"},"canonical_sha256":"07ef3840d58713223c52aa54265f75ce6e93c5af79481ac92edb982a14457621","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:52:38.511238Z","signature_b64":"hEbIWrH0Mor9Gv84XwkOz77UAvWGYc0yyK2sOeznYicwEpqPV5/hhV03y4yfXB3Em78ZGXTFxCr+cLvd4BLPAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"07ef3840d58713223c52aa54265f75ce6e93c5af79481ac92edb982a14457621","last_reissued_at":"2026-07-04T23:52:38.510238Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:52:38.510238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.03301","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":"2026-07-04T23:52:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6ZulsfzhPHVc37s+N/Rc3z7xeAzQwDfsOkxCbo3d+eTkbYwws2IQQ48+wiRfiSNbJa2f6VFif0AEYFt8ZUrOBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T07:08:19.550250Z"},"content_sha256":"77680d4a394ec421a04251db91de5a224702ea8556021ac10167d09cb2174c8d","schema_version":"1.0","event_id":"sha256:77680d4a394ec421a04251db91de5a224702ea8556021ac10167d09cb2174c8d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:A7XTQQGVQ4JSEPCSVJKCMX3VZZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Efficient Simulation of Fluid Flow and Transport in Heterogeneous Media Using Graphics Processing Units (GPUs)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.DC"],"primary_cat":"physics.comp-ph","authors_text":"Hassan Dashtian, Muhammad Sahimi","submitted_at":"2019-08-09T03:57:21Z","abstract_excerpt":"Networks of interconnected resistors, springs and beams, or pores are standard models of studying scalar and vector transport processes in heterogeneous materials and media, such as fluid flow in porous media, and conduction, deformations, and electric and dielectric breakdown in heterogeneous solids. The computation time and required memory are two limiting factors that hinder the scalability of the computations to very large sizes. We present a dual approach, based on the use of a combination of the central processing units (CPUs) and graphics processing units (GPUs), to simulation of flow, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03301","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/1908.03301/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":"2026-07-04T23:52:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oSn8KzjwC0BSzgoFkkw4CeOzF36lRWVv5K1XIVh6iWlZzA4nihsnnOQDHN0mYFBmGfd0UEWqpR2gEGmRpJlSAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T07:08:19.550747Z"},"content_sha256":"89404d8d4c4435adae66829171a403970ee1debd48440623718e12d28eafd673","schema_version":"1.0","event_id":"sha256:89404d8d4c4435adae66829171a403970ee1debd48440623718e12d28eafd673"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A7XTQQGVQ4JSEPCSVJKCMX3VZZ/bundle.json","state_url":"https://pith.science/pith/A7XTQQGVQ4JSEPCSVJKCMX3VZZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A7XTQQGVQ4JSEPCSVJKCMX3VZZ/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":"2026-08-16T07:08:19Z","links":{"resolver":"https://pith.science/pith/A7XTQQGVQ4JSEPCSVJKCMX3VZZ","bundle":"https://pith.science/pith/A7XTQQGVQ4JSEPCSVJKCMX3VZZ/bundle.json","state":"https://pith.science/pith/A7XTQQGVQ4JSEPCSVJKCMX3VZZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A7XTQQGVQ4JSEPCSVJKCMX3VZZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:A7XTQQGVQ4JSEPCSVJKCMX3VZZ","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":"c6f15d1261097d393ec8739b22c5596bce5f42a6fa859737985e4584323c7034","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2019-08-09T03:57:21Z","title_canon_sha256":"3f6f9dd91f9fa62014e911a8e46027fce7a81e525507bd5263ae0e4555551e7b"},"schema_version":"1.0","source":{"id":"1908.03301","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.03301","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"arxiv_version","alias_value":"1908.03301v1","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.03301","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"pith_short_12","alias_value":"A7XTQQGVQ4JS","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"pith_short_16","alias_value":"A7XTQQGVQ4JSEPCS","created_at":"2026-07-04T23:52:38Z"},{"alias_kind":"pith_short_8","alias_value":"A7XTQQGV","created_at":"2026-07-04T23:52:38Z"}],"graph_snapshots":[{"event_id":"sha256:89404d8d4c4435adae66829171a403970ee1debd48440623718e12d28eafd673","target":"graph","created_at":"2026-07-04T23:52:38Z","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/1908.03301/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Networks of interconnected resistors, springs and beams, or pores are standard models of studying scalar and vector transport processes in heterogeneous materials and media, such as fluid flow in porous media, and conduction, deformations, and electric and dielectric breakdown in heterogeneous solids. The computation time and required memory are two limiting factors that hinder the scalability of the computations to very large sizes. We present a dual approach, based on the use of a combination of the central processing units (CPUs) and graphics processing units (GPUs), to simulation of flow, ","authors_text":"Hassan Dashtian, Muhammad Sahimi","cross_cats":["cs.DC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2019-08-09T03:57:21Z","title":"Efficient Simulation of Fluid Flow and Transport in Heterogeneous Media Using Graphics Processing Units (GPUs)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.03301","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":"sha256:77680d4a394ec421a04251db91de5a224702ea8556021ac10167d09cb2174c8d","target":"record","created_at":"2026-07-04T23:52:38Z","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":"c6f15d1261097d393ec8739b22c5596bce5f42a6fa859737985e4584323c7034","cross_cats_sorted":["cs.DC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.comp-ph","submitted_at":"2019-08-09T03:57:21Z","title_canon_sha256":"3f6f9dd91f9fa62014e911a8e46027fce7a81e525507bd5263ae0e4555551e7b"},"schema_version":"1.0","source":{"id":"1908.03301","kind":"arxiv","version":1}},"canonical_sha256":"07ef3840d58713223c52aa54265f75ce6e93c5af79481ac92edb982a14457621","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"07ef3840d58713223c52aa54265f75ce6e93c5af79481ac92edb982a14457621","first_computed_at":"2026-07-04T23:52:38.510238Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:52:38.510238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hEbIWrH0Mor9Gv84XwkOz77UAvWGYc0yyK2sOeznYicwEpqPV5/hhV03y4yfXB3Em78ZGXTFxCr+cLvd4BLPAg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:52:38.511238Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.03301","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77680d4a394ec421a04251db91de5a224702ea8556021ac10167d09cb2174c8d","sha256:89404d8d4c4435adae66829171a403970ee1debd48440623718e12d28eafd673"],"state_sha256":"dc308f461ecdea4ac7e7145f85f3d6deb4a82c1272017ba7ca2b11ab1711a7a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AkXTKl2HafWeBVSDsLMKP5X1P/FqSkTuH3hMldA1nh3B60LVuygOUipYJCm3f1rUgp96rLe+9CthNSL/+rWqBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T07:08:19.554109Z","bundle_sha256":"2aa2435f12927d2390ca1f93611526a51847288b06c2cca79c3696599c06b345"}}