{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2O623JKBADFLRDCK6GPZGJ3GZ7","short_pith_number":"pith:2O623JKB","canonical_record":{"source":{"id":"1906.09179","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-21T15:00:38Z","cross_cats_sorted":[],"title_canon_sha256":"e6acfedd13b5b343c39fb136cdd27db07872ad29bc3d68179dd41272da17670a","abstract_canon_sha256":"3dbc3c3275191f5b19771b7fb5467393d30d7575ef63322ebf93d5b14c426bc8"},"schema_version":"1.0"},"canonical_sha256":"d3bdada54100cab88c4af19f932766cfff2086bfa90193c9f03f6a71d847d17d","source":{"kind":"arxiv","id":"1906.09179","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09179","created_at":"2026-05-17T23:42:44Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09179v1","created_at":"2026-05-17T23:42:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09179","created_at":"2026-05-17T23:42:44Z"},{"alias_kind":"pith_short_12","alias_value":"2O623JKBADFL","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2O623JKBADFLRDCK","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2O623JKB","created_at":"2026-05-18T12:33:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2O623JKBADFLRDCK6GPZGJ3GZ7","target":"record","payload":{"canonical_record":{"source":{"id":"1906.09179","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-21T15:00:38Z","cross_cats_sorted":[],"title_canon_sha256":"e6acfedd13b5b343c39fb136cdd27db07872ad29bc3d68179dd41272da17670a","abstract_canon_sha256":"3dbc3c3275191f5b19771b7fb5467393d30d7575ef63322ebf93d5b14c426bc8"},"schema_version":"1.0"},"canonical_sha256":"d3bdada54100cab88c4af19f932766cfff2086bfa90193c9f03f6a71d847d17d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:44.275438Z","signature_b64":"HGgL2F3eP+RE/uNbPmVq3NGPwi3BRnjCnJux1Uub66yNc2PwEeBW1VUTGd+xXe4mDbCVLzx3rv/oZGRu/XqaDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d3bdada54100cab88c4af19f932766cfff2086bfa90193c9f03f6a71d847d17d","last_reissued_at":"2026-05-17T23:42:44.274760Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:44.274760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.09179","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":"2026-05-17T23:42:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kaXU4/hEuhDREp/+Qk1yX11Pjg5t481iUJ6XUjewrUNCVKQyWFi0DT1JmlxOtr0D0VS+LkbdEyTQ+IQje4JHAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:49:57.125887Z"},"content_sha256":"01a06cd7aba2d6c2572425f968fed9b3e247b313f20e5392ffd5e39f668eb9a8","schema_version":"1.0","event_id":"sha256:01a06cd7aba2d6c2572425f968fed9b3e247b313f20e5392ffd5e39f668eb9a8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2O623JKBADFLRDCK6GPZGJ3GZ7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Challenges for Verifying and Validating Scientific Software in Computational Materials Science","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.SE","authors_text":"Claudia Draxl, Lars Grunske, Markus Scheidgen, Stephan Druskat, Thomas Vogel","submitted_at":"2019-06-21T15:00:38Z","abstract_excerpt":"Many fields of science rely on software systems to answer different research questions. For valid results researchers need to trust the results scientific software produces, and consequently quality assurance is of utmost importance. In this paper we are investigating the impact of quality assurance in the domain of computational materials science (CMS). Based on our experience in this domain we formulate challenges for validation and verification of scientific software and their results. Furthermore, we describe directions for future research that can potentially help dealing with these chall"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09179","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":"2026-05-17T23:42:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4kpoSBARhCjKYH57VrfNcF/gJUmhm9cww7H8gJUCj3HedyrC2/F/bT/bgESwolT6c5c7Uz4c5nPj0QkTZwnDBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T21:49:57.126608Z"},"content_sha256":"2521422388f17a3fd7f3e668d670be91928f5ae82a24c884154bd00f4c1477d4","schema_version":"1.0","event_id":"sha256:2521422388f17a3fd7f3e668d670be91928f5ae82a24c884154bd00f4c1477d4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2O623JKBADFLRDCK6GPZGJ3GZ7/bundle.json","state_url":"https://pith.science/pith/2O623JKBADFLRDCK6GPZGJ3GZ7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2O623JKBADFLRDCK6GPZGJ3GZ7/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":"2026-05-28T21:49:57Z","links":{"resolver":"https://pith.science/pith/2O623JKBADFLRDCK6GPZGJ3GZ7","bundle":"https://pith.science/pith/2O623JKBADFLRDCK6GPZGJ3GZ7/bundle.json","state":"https://pith.science/pith/2O623JKBADFLRDCK6GPZGJ3GZ7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2O623JKBADFLRDCK6GPZGJ3GZ7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2O623JKBADFLRDCK6GPZGJ3GZ7","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":"3dbc3c3275191f5b19771b7fb5467393d30d7575ef63322ebf93d5b14c426bc8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-21T15:00:38Z","title_canon_sha256":"e6acfedd13b5b343c39fb136cdd27db07872ad29bc3d68179dd41272da17670a"},"schema_version":"1.0","source":{"id":"1906.09179","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.09179","created_at":"2026-05-17T23:42:44Z"},{"alias_kind":"arxiv_version","alias_value":"1906.09179v1","created_at":"2026-05-17T23:42:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.09179","created_at":"2026-05-17T23:42:44Z"},{"alias_kind":"pith_short_12","alias_value":"2O623JKBADFL","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_16","alias_value":"2O623JKBADFLRDCK","created_at":"2026-05-18T12:33:07Z"},{"alias_kind":"pith_short_8","alias_value":"2O623JKB","created_at":"2026-05-18T12:33:07Z"}],"graph_snapshots":[{"event_id":"sha256:2521422388f17a3fd7f3e668d670be91928f5ae82a24c884154bd00f4c1477d4","target":"graph","created_at":"2026-05-17T23:42:44Z","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":"Many fields of science rely on software systems to answer different research questions. For valid results researchers need to trust the results scientific software produces, and consequently quality assurance is of utmost importance. In this paper we are investigating the impact of quality assurance in the domain of computational materials science (CMS). Based on our experience in this domain we formulate challenges for validation and verification of scientific software and their results. Furthermore, we describe directions for future research that can potentially help dealing with these chall","authors_text":"Claudia Draxl, Lars Grunske, Markus Scheidgen, Stephan Druskat, Thomas Vogel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-21T15:00:38Z","title":"Challenges for Verifying and Validating Scientific Software in Computational Materials Science"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.09179","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":"sha256:01a06cd7aba2d6c2572425f968fed9b3e247b313f20e5392ffd5e39f668eb9a8","target":"record","created_at":"2026-05-17T23:42:44Z","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":"3dbc3c3275191f5b19771b7fb5467393d30d7575ef63322ebf93d5b14c426bc8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SE","submitted_at":"2019-06-21T15:00:38Z","title_canon_sha256":"e6acfedd13b5b343c39fb136cdd27db07872ad29bc3d68179dd41272da17670a"},"schema_version":"1.0","source":{"id":"1906.09179","kind":"arxiv","version":1}},"canonical_sha256":"d3bdada54100cab88c4af19f932766cfff2086bfa90193c9f03f6a71d847d17d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d3bdada54100cab88c4af19f932766cfff2086bfa90193c9f03f6a71d847d17d","first_computed_at":"2026-05-17T23:42:44.274760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:44.274760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HGgL2F3eP+RE/uNbPmVq3NGPwi3BRnjCnJux1Uub66yNc2PwEeBW1VUTGd+xXe4mDbCVLzx3rv/oZGRu/XqaDA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:44.275438Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.09179","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01a06cd7aba2d6c2572425f968fed9b3e247b313f20e5392ffd5e39f668eb9a8","sha256:2521422388f17a3fd7f3e668d670be91928f5ae82a24c884154bd00f4c1477d4"],"state_sha256":"8d7507ac411da2f5a3bd12fabe2675846008a0678aad772575d12c3ebb84c2e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s5pwm1D/gKyfJ1yT06aZu4hEz7ODglJ72awebxHGziBAgGTbWiTGhy8lFwSsnRUOPlUwsJgbcAkf2/wbaYd3AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T21:49:57.130426Z","bundle_sha256":"ca5050d8e92c9755f40c26c48fe1a587f2df6e2932a6b3ee5c9613c2db31ae51"}}