{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:DYZCTGPJVD6SIMMIQ4YYQWPZBN","short_pith_number":"pith:DYZCTGPJ","canonical_record":{"source":{"id":"1005.4396","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2010-05-24T18:59:35Z","cross_cats_sorted":[],"title_canon_sha256":"e3d90655634a4a1f493822e65bfe749c2aad7423d165203c5785162ba4d42c5e","abstract_canon_sha256":"68876c2a68f300a48b62029d588d72ea6439f92dbecd3333a909d7d4f27c398c"},"schema_version":"1.0"},"canonical_sha256":"1e322999e9a8fd24318887318859f90b401960d22085e1e70225838e205327b3","source":{"kind":"arxiv","id":"1005.4396","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4396","created_at":"2026-05-18T02:07:15Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4396v1","created_at":"2026-05-18T02:07:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4396","created_at":"2026-05-18T02:07:15Z"},{"alias_kind":"pith_short_12","alias_value":"DYZCTGPJVD6S","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DYZCTGPJVD6SIMMI","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DYZCTGPJ","created_at":"2026-05-18T12:26:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:DYZCTGPJVD6SIMMIQ4YYQWPZBN","target":"record","payload":{"canonical_record":{"source":{"id":"1005.4396","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2010-05-24T18:59:35Z","cross_cats_sorted":[],"title_canon_sha256":"e3d90655634a4a1f493822e65bfe749c2aad7423d165203c5785162ba4d42c5e","abstract_canon_sha256":"68876c2a68f300a48b62029d588d72ea6439f92dbecd3333a909d7d4f27c398c"},"schema_version":"1.0"},"canonical_sha256":"1e322999e9a8fd24318887318859f90b401960d22085e1e70225838e205327b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:15.055757Z","signature_b64":"u+kskcPEVM/qO0X2LJ0MNhOWG1wcqMV7yXVt0JdRJWo2Y6TIWBW/yvgSZPzI2Iz2FkypHYU1GJKbZTV76VcxAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1e322999e9a8fd24318887318859f90b401960d22085e1e70225838e205327b3","last_reissued_at":"2026-05-18T02:07:15.054989Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:15.054989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1005.4396","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":"2026-05-18T02:07:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zxDQrBjHGgk5QNxamsEvxFv4TizBwEWP1xmK94rSOP4Z/lkEcTp9pCXHhsHRj1K27aPO4aQLJncxHP7e29yrDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T10:19:55.559300Z"},"content_sha256":"dc5ba02c0a925588c68dc21bdff601f4273e600d33709dc7ae6b62e1eaf78217","schema_version":"1.0","event_id":"sha256:dc5ba02c0a925588c68dc21bdff601f4273e600d33709dc7ae6b62e1eaf78217"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:DYZCTGPJVD6SIMMIQ4YYQWPZBN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultra-fast treatment plan optimization for volumetric modulated arc therapy (VMAT)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Chunhua Men, H. Edwin Romeijn, Steve B. Jiang, Xun Jia","submitted_at":"2010-05-24T18:59:35Z","abstract_excerpt":"Purpose: To develop a novel aperture-based algorithm for volumetric modulated arc therapy (VMAT) treatment plan optimization with high quality and high efficiency. Methods: The VMAT optimization problem is formulated as a large-scale convex programming problem solved by a column generation approach. We consider a cost function consisting two terms, the first which enforces a desired dose distribution while the second guarantees a smooth dose rate variation between successive gantry angles. At each iteration of the column generation method, a subproblem is first solved to generate one more deli"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4396","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":"2026-05-18T02:07:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2chpIRa0dSNBz3iiAbQ3ckr+HvM0rSTcvaYlJ4BDp6ROJybiSxyGusei8YYVpjXRbTpH/1KawcbT3cEIaRbpDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T10:19:55.559717Z"},"content_sha256":"db8a2b587b0ea77707e724a36bb9ce3e191300a65e459b29460b1c6a05e2bbca","schema_version":"1.0","event_id":"sha256:db8a2b587b0ea77707e724a36bb9ce3e191300a65e459b29460b1c6a05e2bbca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DYZCTGPJVD6SIMMIQ4YYQWPZBN/bundle.json","state_url":"https://pith.science/pith/DYZCTGPJVD6SIMMIQ4YYQWPZBN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DYZCTGPJVD6SIMMIQ4YYQWPZBN/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":"2026-06-11T10:19:55Z","links":{"resolver":"https://pith.science/pith/DYZCTGPJVD6SIMMIQ4YYQWPZBN","bundle":"https://pith.science/pith/DYZCTGPJVD6SIMMIQ4YYQWPZBN/bundle.json","state":"https://pith.science/pith/DYZCTGPJVD6SIMMIQ4YYQWPZBN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DYZCTGPJVD6SIMMIQ4YYQWPZBN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:DYZCTGPJVD6SIMMIQ4YYQWPZBN","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":"68876c2a68f300a48b62029d588d72ea6439f92dbecd3333a909d7d4f27c398c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2010-05-24T18:59:35Z","title_canon_sha256":"e3d90655634a4a1f493822e65bfe749c2aad7423d165203c5785162ba4d42c5e"},"schema_version":"1.0","source":{"id":"1005.4396","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1005.4396","created_at":"2026-05-18T02:07:15Z"},{"alias_kind":"arxiv_version","alias_value":"1005.4396v1","created_at":"2026-05-18T02:07:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1005.4396","created_at":"2026-05-18T02:07:15Z"},{"alias_kind":"pith_short_12","alias_value":"DYZCTGPJVD6S","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_16","alias_value":"DYZCTGPJVD6SIMMI","created_at":"2026-05-18T12:26:06Z"},{"alias_kind":"pith_short_8","alias_value":"DYZCTGPJ","created_at":"2026-05-18T12:26:06Z"}],"graph_snapshots":[{"event_id":"sha256:db8a2b587b0ea77707e724a36bb9ce3e191300a65e459b29460b1c6a05e2bbca","target":"graph","created_at":"2026-05-18T02:07:15Z","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":"Purpose: To develop a novel aperture-based algorithm for volumetric modulated arc therapy (VMAT) treatment plan optimization with high quality and high efficiency. Methods: The VMAT optimization problem is formulated as a large-scale convex programming problem solved by a column generation approach. We consider a cost function consisting two terms, the first which enforces a desired dose distribution while the second guarantees a smooth dose rate variation between successive gantry angles. At each iteration of the column generation method, a subproblem is first solved to generate one more deli","authors_text":"Chunhua Men, H. Edwin Romeijn, Steve B. Jiang, Xun Jia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2010-05-24T18:59:35Z","title":"Ultra-fast treatment plan optimization for volumetric modulated arc therapy (VMAT)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.4396","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:dc5ba02c0a925588c68dc21bdff601f4273e600d33709dc7ae6b62e1eaf78217","target":"record","created_at":"2026-05-18T02:07:15Z","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":"68876c2a68f300a48b62029d588d72ea6439f92dbecd3333a909d7d4f27c398c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2010-05-24T18:59:35Z","title_canon_sha256":"e3d90655634a4a1f493822e65bfe749c2aad7423d165203c5785162ba4d42c5e"},"schema_version":"1.0","source":{"id":"1005.4396","kind":"arxiv","version":1}},"canonical_sha256":"1e322999e9a8fd24318887318859f90b401960d22085e1e70225838e205327b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1e322999e9a8fd24318887318859f90b401960d22085e1e70225838e205327b3","first_computed_at":"2026-05-18T02:07:15.054989Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:15.054989Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u+kskcPEVM/qO0X2LJ0MNhOWG1wcqMV7yXVt0JdRJWo2Y6TIWBW/yvgSZPzI2Iz2FkypHYU1GJKbZTV76VcxAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:15.055757Z","signed_message":"canonical_sha256_bytes"},"source_id":"1005.4396","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dc5ba02c0a925588c68dc21bdff601f4273e600d33709dc7ae6b62e1eaf78217","sha256:db8a2b587b0ea77707e724a36bb9ce3e191300a65e459b29460b1c6a05e2bbca"],"state_sha256":"2524dd68f95f41344acf63bd7ef502bfa88951a80d146621f845d827e58e9908"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LnvDQjDYO2lWTxJc6el8vZBo2CZvnIbqdcZOHj/4ps4g0g8zdklrxSeUn2ieilrOBz1i4bDKrRQIYHA+dwRmDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T10:19:55.561688Z","bundle_sha256":"315b555837fdf63d31c74721e28998f18494b2eb48d039e678a3a859af172fc4"}}