{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:PZ7RHVGUETLGCNT4TIUJKEIF7W","short_pith_number":"pith:PZ7RHVGU","canonical_record":{"source":{"id":"1905.08222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2019-05-20T17:21:39Z","cross_cats_sorted":[],"title_canon_sha256":"faa51dfc203f98d280624067922adbd9ff2f22eb581dd09452510dd8725ed35a","abstract_canon_sha256":"60e19cea1c717ee22c0999b06bba31b431556948704d8764db4d902dc338d67b"},"schema_version":"1.0"},"canonical_sha256":"7e7f13d4d424d661367c9a28951105fd89099a08fb88cbe3903766509de85ab5","source":{"kind":"arxiv","id":"1905.08222","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.08222","created_at":"2026-05-17T23:45:47Z"},{"alias_kind":"arxiv_version","alias_value":"1905.08222v1","created_at":"2026-05-17T23:45:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.08222","created_at":"2026-05-17T23:45:47Z"},{"alias_kind":"pith_short_12","alias_value":"PZ7RHVGUETLG","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PZ7RHVGUETLGCNT4","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PZ7RHVGU","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:PZ7RHVGUETLGCNT4TIUJKEIF7W","target":"record","payload":{"canonical_record":{"source":{"id":"1905.08222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2019-05-20T17:21:39Z","cross_cats_sorted":[],"title_canon_sha256":"faa51dfc203f98d280624067922adbd9ff2f22eb581dd09452510dd8725ed35a","abstract_canon_sha256":"60e19cea1c717ee22c0999b06bba31b431556948704d8764db4d902dc338d67b"},"schema_version":"1.0"},"canonical_sha256":"7e7f13d4d424d661367c9a28951105fd89099a08fb88cbe3903766509de85ab5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:47.294460Z","signature_b64":"txxERbLuqR96WtBcycEaELEUVcTHsvWPasEK+NXho9+cOmTMp4z+AN0xHJ/GwnhTrULWzNTzbIApJQtJR/u1CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e7f13d4d424d661367c9a28951105fd89099a08fb88cbe3903766509de85ab5","last_reissued_at":"2026-05-17T23:45:47.293896Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:47.293896Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.08222","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":"2026-05-17T23:45:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"opTFBQZV30ibnny36Gmz4d+H9G9tMo4IrsiqlWOJIgkTiErkFaAOmsbF7Em5ntGDCvUZAVQwPapX7vsdEr1+Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:54:27.650820Z"},"content_sha256":"bff0013c51ca0ff3e1187012f7939c96a3eb96f46f3da87584a572628c893d6a","schema_version":"1.0","event_id":"sha256:bff0013c51ca0ff3e1187012f7939c96a3eb96f46f3da87584a572628c893d6a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:PZ7RHVGUETLGCNT4TIUJKEIF7W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Accelerated Discovery of Sustainable Building Materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AI","authors_text":"Jeremy R. Gregory, Joana Maria, Lav R. Varshney, Randolph E. Kirchain, Richard T. Goodwin, Xiou Ge","submitted_at":"2019-05-20T17:21:39Z","abstract_excerpt":"Concrete is the most widely used engineered material in the world with more than 10 billion tons produced annually. Unfortunately, with that scale comes a significant burden in terms of energy, water, and release of greenhouse gases and other pollutants. As such, there is interest in creating concrete formulas that minimize this environmental burden, while satisfying engineering performance requirements. Recent advances in artificial intelligence have enabled machines to generate highly plausible artifacts, such as images of realistic looking faces. Semi-supervised generative models allow gene"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.08222","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":"2026-05-17T23:45:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lJ0ARzHV1SWJM1kleA21uiwOoa/uM0CXE88L3v3faoUFxXy5vJUh+LcYMRVSOXj/g2/2lW5x9PbdJ/uygnQ7Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:54:27.651220Z"},"content_sha256":"d6279cf37c7ee26e17c935df745525559186c81600ecc1b46d2da360bb17463e","schema_version":"1.0","event_id":"sha256:d6279cf37c7ee26e17c935df745525559186c81600ecc1b46d2da360bb17463e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PZ7RHVGUETLGCNT4TIUJKEIF7W/bundle.json","state_url":"https://pith.science/pith/PZ7RHVGUETLGCNT4TIUJKEIF7W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PZ7RHVGUETLGCNT4TIUJKEIF7W/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":"2026-06-03T17:54:27Z","links":{"resolver":"https://pith.science/pith/PZ7RHVGUETLGCNT4TIUJKEIF7W","bundle":"https://pith.science/pith/PZ7RHVGUETLGCNT4TIUJKEIF7W/bundle.json","state":"https://pith.science/pith/PZ7RHVGUETLGCNT4TIUJKEIF7W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PZ7RHVGUETLGCNT4TIUJKEIF7W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PZ7RHVGUETLGCNT4TIUJKEIF7W","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":"60e19cea1c717ee22c0999b06bba31b431556948704d8764db4d902dc338d67b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2019-05-20T17:21:39Z","title_canon_sha256":"faa51dfc203f98d280624067922adbd9ff2f22eb581dd09452510dd8725ed35a"},"schema_version":"1.0","source":{"id":"1905.08222","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.08222","created_at":"2026-05-17T23:45:47Z"},{"alias_kind":"arxiv_version","alias_value":"1905.08222v1","created_at":"2026-05-17T23:45:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.08222","created_at":"2026-05-17T23:45:47Z"},{"alias_kind":"pith_short_12","alias_value":"PZ7RHVGUETLG","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PZ7RHVGUETLGCNT4","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PZ7RHVGU","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:d6279cf37c7ee26e17c935df745525559186c81600ecc1b46d2da360bb17463e","target":"graph","created_at":"2026-05-17T23:45:47Z","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":"Concrete is the most widely used engineered material in the world with more than 10 billion tons produced annually. Unfortunately, with that scale comes a significant burden in terms of energy, water, and release of greenhouse gases and other pollutants. As such, there is interest in creating concrete formulas that minimize this environmental burden, while satisfying engineering performance requirements. Recent advances in artificial intelligence have enabled machines to generate highly plausible artifacts, such as images of realistic looking faces. Semi-supervised generative models allow gene","authors_text":"Jeremy R. Gregory, Joana Maria, Lav R. Varshney, Randolph E. Kirchain, Richard T. Goodwin, Xiou Ge","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2019-05-20T17:21:39Z","title":"Accelerated Discovery of Sustainable Building Materials"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.08222","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:bff0013c51ca0ff3e1187012f7939c96a3eb96f46f3da87584a572628c893d6a","target":"record","created_at":"2026-05-17T23:45:47Z","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":"60e19cea1c717ee22c0999b06bba31b431556948704d8764db4d902dc338d67b","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2019-05-20T17:21:39Z","title_canon_sha256":"faa51dfc203f98d280624067922adbd9ff2f22eb581dd09452510dd8725ed35a"},"schema_version":"1.0","source":{"id":"1905.08222","kind":"arxiv","version":1}},"canonical_sha256":"7e7f13d4d424d661367c9a28951105fd89099a08fb88cbe3903766509de85ab5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7e7f13d4d424d661367c9a28951105fd89099a08fb88cbe3903766509de85ab5","first_computed_at":"2026-05-17T23:45:47.293896Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:47.293896Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"txxERbLuqR96WtBcycEaELEUVcTHsvWPasEK+NXho9+cOmTMp4z+AN0xHJ/GwnhTrULWzNTzbIApJQtJR/u1CQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:47.294460Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.08222","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bff0013c51ca0ff3e1187012f7939c96a3eb96f46f3da87584a572628c893d6a","sha256:d6279cf37c7ee26e17c935df745525559186c81600ecc1b46d2da360bb17463e"],"state_sha256":"973e7510c082dfc9cb4f9c24f072b7a8aa386b19f4ec86acbd1d8e7af499f37f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d+lL4qtXYTXkIOWf1c2T7xJW7WT4ijG7I0AH7kNK0gJAUOvzrHfrBAwdGyrkA9o/EVw5HwybOzNUxWMPUlrGDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T17:54:27.653189Z","bundle_sha256":"e02c7db389d4d10ae32715a684557e25db08cc6b1c17babf9f3985b7173c0c1d"}}