{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:BAAZB7KKC7HE64JTA3MBF3H5FV","short_pith_number":"pith:BAAZB7KK","canonical_record":{"source":{"id":"1904.02614","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-04-04T15:40:56Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"abb411ff1565052dc9ff5f24c45ddc9fb6ab00a4d8d14157b6ce092d8654c341","abstract_canon_sha256":"83218b51222e2972d34bb1c1a20e83844a9cbe263e96a368ff4bd0627985c4a5"},"schema_version":"1.0"},"canonical_sha256":"080190fd4a17ce4f713306d812ecfd2d789cb736ab9092cb8301901068ccd125","source":{"kind":"arxiv","id":"1904.02614","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.02614","created_at":"2026-05-17T23:49:23Z"},{"alias_kind":"arxiv_version","alias_value":"1904.02614v1","created_at":"2026-05-17T23:49:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.02614","created_at":"2026-05-17T23:49:23Z"},{"alias_kind":"pith_short_12","alias_value":"BAAZB7KKC7HE","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BAAZB7KKC7HE64JT","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BAAZB7KK","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:BAAZB7KKC7HE64JTA3MBF3H5FV","target":"record","payload":{"canonical_record":{"source":{"id":"1904.02614","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-04-04T15:40:56Z","cross_cats_sorted":["physics.comp-ph"],"title_canon_sha256":"abb411ff1565052dc9ff5f24c45ddc9fb6ab00a4d8d14157b6ce092d8654c341","abstract_canon_sha256":"83218b51222e2972d34bb1c1a20e83844a9cbe263e96a368ff4bd0627985c4a5"},"schema_version":"1.0"},"canonical_sha256":"080190fd4a17ce4f713306d812ecfd2d789cb736ab9092cb8301901068ccd125","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:23.189115Z","signature_b64":"kZ1iEWJsmxesemTfJhvH67B080UhHNRfES5VYw5aP6jNSRUX/aVXMSvAFeWUr33hlTPVHvwnGoijDJ8bzKT6BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"080190fd4a17ce4f713306d812ecfd2d789cb736ab9092cb8301901068ccd125","last_reissued_at":"2026-05-17T23:49:23.188718Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:23.188718Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.02614","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":"2026-05-17T23:49:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yuPSVjg2MnM0whIQrKtm415OKNSgWLO9w1PG3nBPPXG+VCk/PzaJFuelpYkhOflRiDeqxofqP8z//8qnbqBxDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:03:25.962171Z"},"content_sha256":"a4f506b7c7e6b76a05734d35e5bb90d85fbf88f6dd6181b3079f3ce8f1cf372c","schema_version":"1.0","event_id":"sha256:a4f506b7c7e6b76a05734d35e5bb90d85fbf88f6dd6181b3079f3ce8f1cf372c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:BAAZB7KKC7HE64JTA3MBF3H5FV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Sampling Limits for Electron Tomography with Sparsity-exploiting Reconstructions","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["physics.comp-ph"],"primary_cat":"cs.CV","authors_text":"David A. Muller, Elliot Padgett, Robert Hovden, Yi Jiang","submitted_at":"2019-04-04T15:40:56Z","abstract_excerpt":"Electron tomography (ET) has become a standard technique for 3D characterization of materials at the nano-scale. Traditional reconstruction algorithms such as weighted back projection suffer from disruptive artifacts with insufficient projections. Popularized by compressed sensing, sparsity-exploiting algorithms have been applied to experimental ET data and show promise for improving reconstruction quality or reducing the total beam dose applied to a specimen. Nevertheless, theoretical bounds for these methods have been less explored in the context of ET applications. Here, we perform numerica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.02614","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":"2026-05-17T23:49:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rUqUjTI2uTdmbCyA0WYwPkPukdXAi9xoVWwWPGUX0PG0mQ1qotYDvGbLBbv/7L5TnLlvDELf8aDHPweYpv53Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T11:03:25.962738Z"},"content_sha256":"59f150e8d165427a84b41dca659e4f1f84ffcbbff7b4f0d352f09d361d2252c0","schema_version":"1.0","event_id":"sha256:59f150e8d165427a84b41dca659e4f1f84ffcbbff7b4f0d352f09d361d2252c0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BAAZB7KKC7HE64JTA3MBF3H5FV/bundle.json","state_url":"https://pith.science/pith/BAAZB7KKC7HE64JTA3MBF3H5FV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BAAZB7KKC7HE64JTA3MBF3H5FV/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":"2026-05-26T11:03:25Z","links":{"resolver":"https://pith.science/pith/BAAZB7KKC7HE64JTA3MBF3H5FV","bundle":"https://pith.science/pith/BAAZB7KKC7HE64JTA3MBF3H5FV/bundle.json","state":"https://pith.science/pith/BAAZB7KKC7HE64JTA3MBF3H5FV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BAAZB7KKC7HE64JTA3MBF3H5FV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:BAAZB7KKC7HE64JTA3MBF3H5FV","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":"83218b51222e2972d34bb1c1a20e83844a9cbe263e96a368ff4bd0627985c4a5","cross_cats_sorted":["physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-04-04T15:40:56Z","title_canon_sha256":"abb411ff1565052dc9ff5f24c45ddc9fb6ab00a4d8d14157b6ce092d8654c341"},"schema_version":"1.0","source":{"id":"1904.02614","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.02614","created_at":"2026-05-17T23:49:23Z"},{"alias_kind":"arxiv_version","alias_value":"1904.02614v1","created_at":"2026-05-17T23:49:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.02614","created_at":"2026-05-17T23:49:23Z"},{"alias_kind":"pith_short_12","alias_value":"BAAZB7KKC7HE","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"BAAZB7KKC7HE64JT","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"BAAZB7KK","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:59f150e8d165427a84b41dca659e4f1f84ffcbbff7b4f0d352f09d361d2252c0","target":"graph","created_at":"2026-05-17T23:49:23Z","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":"Electron tomography (ET) has become a standard technique for 3D characterization of materials at the nano-scale. Traditional reconstruction algorithms such as weighted back projection suffer from disruptive artifacts with insufficient projections. Popularized by compressed sensing, sparsity-exploiting algorithms have been applied to experimental ET data and show promise for improving reconstruction quality or reducing the total beam dose applied to a specimen. Nevertheless, theoretical bounds for these methods have been less explored in the context of ET applications. Here, we perform numerica","authors_text":"David A. Muller, Elliot Padgett, Robert Hovden, Yi Jiang","cross_cats":["physics.comp-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-04-04T15:40:56Z","title":"Sampling Limits for Electron Tomography with Sparsity-exploiting Reconstructions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.02614","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:a4f506b7c7e6b76a05734d35e5bb90d85fbf88f6dd6181b3079f3ce8f1cf372c","target":"record","created_at":"2026-05-17T23:49:23Z","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":"83218b51222e2972d34bb1c1a20e83844a9cbe263e96a368ff4bd0627985c4a5","cross_cats_sorted":["physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CV","submitted_at":"2019-04-04T15:40:56Z","title_canon_sha256":"abb411ff1565052dc9ff5f24c45ddc9fb6ab00a4d8d14157b6ce092d8654c341"},"schema_version":"1.0","source":{"id":"1904.02614","kind":"arxiv","version":1}},"canonical_sha256":"080190fd4a17ce4f713306d812ecfd2d789cb736ab9092cb8301901068ccd125","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"080190fd4a17ce4f713306d812ecfd2d789cb736ab9092cb8301901068ccd125","first_computed_at":"2026-05-17T23:49:23.188718Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:23.188718Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kZ1iEWJsmxesemTfJhvH67B080UhHNRfES5VYw5aP6jNSRUX/aVXMSvAFeWUr33hlTPVHvwnGoijDJ8bzKT6BQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:23.189115Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.02614","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a4f506b7c7e6b76a05734d35e5bb90d85fbf88f6dd6181b3079f3ce8f1cf372c","sha256:59f150e8d165427a84b41dca659e4f1f84ffcbbff7b4f0d352f09d361d2252c0"],"state_sha256":"7642e2c4e566d191edb1add38ad66f4696e1f9e3a205f386f74704c1e8e92eea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v/BfnmST+vfZ0pXXGag/R8M9EdxHwZ/l3VF73lmvumNcceKc/DIU3c60PnGiSCYPEBEeHBZKfReBCrIoNPzcBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T11:03:25.965794Z","bundle_sha256":"3154051be0290379786cdf387d6c9316675aa60660f96721dc15b1593748ab24"}}