{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:TSRJX3GNVKMK3YVTGRWG7W5Q4D","short_pith_number":"pith:TSRJX3GN","canonical_record":{"source":{"id":"2012.13050","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2020-12-24T01:03:36Z","cross_cats_sorted":[],"title_canon_sha256":"bb7c5bf2e940f20561ea69fb1aef0ccc150573ca0d0cb0ceb73bd5ca217bc577","abstract_canon_sha256":"523b39e677389d3099a6a6aa328f97bc845a9dba5fcc1296b80ebbb93dcad6d9"},"schema_version":"1.0"},"canonical_sha256":"9ca29beccdaa98ade2b3346c6fdbb0e0f174c91c177423342c49e270da1c81b0","source":{"kind":"arxiv","id":"2012.13050","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.13050","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"arxiv_version","alias_value":"2012.13050v1","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.13050","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"pith_short_12","alias_value":"TSRJX3GNVKMK","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"pith_short_16","alias_value":"TSRJX3GNVKMK3YVT","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"pith_short_8","alias_value":"TSRJX3GN","created_at":"2026-07-05T02:01:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:TSRJX3GNVKMK3YVTGRWG7W5Q4D","target":"record","payload":{"canonical_record":{"source":{"id":"2012.13050","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2020-12-24T01:03:36Z","cross_cats_sorted":[],"title_canon_sha256":"bb7c5bf2e940f20561ea69fb1aef0ccc150573ca0d0cb0ceb73bd5ca217bc577","abstract_canon_sha256":"523b39e677389d3099a6a6aa328f97bc845a9dba5fcc1296b80ebbb93dcad6d9"},"schema_version":"1.0"},"canonical_sha256":"9ca29beccdaa98ade2b3346c6fdbb0e0f174c91c177423342c49e270da1c81b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:01:47.212144Z","signature_b64":"BlRbHxbdTffUtpiN8E/aBuUkeeVv55WC4mp2qMoiChnTv09HGyWzPI5iJnDridHMMJ/dgjAXNobpv3U7saMOCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ca29beccdaa98ade2b3346c6fdbb0e0f174c91c177423342c49e270da1c81b0","last_reissued_at":"2026-07-05T02:01:47.211530Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:01:47.211530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.13050","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":"2026-07-05T02:01:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YT+Hku5elxqSgLKSURsArZZ0j/g1ts69Az2VuAvaPupjmIlS4NXOsQ1kbSVvs0V8c5Tlb2arhnwreiGZtQD+Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T04:12:22.133948Z"},"content_sha256":"a15a554223d199a2043508d26b3b8764813229d1c6983df74c6c0548d88cc117","schema_version":"1.0","event_id":"sha256:a15a554223d199a2043508d26b3b8764813229d1c6983df74c6c0548d88cc117"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:TSRJX3GNVKMK3YVTGRWG7W5Q4D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Superposed Wave (s-Wave): Accelerating Photoacoustic Simulation","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Changchun Yang, Fei Gao, Feng Gao, Jiadong Zhang, Shanshan Guo, Tengbo Lyu, Yimeng Yang","submitted_at":"2020-12-24T01:03:36Z","abstract_excerpt":"Photoacoustic imaging develops very fast in recent years due to its superior performance in many preclinical and clinical applications. However, it is still in a developing stage, and a lot of experiments have to be performed in a simulation setting. To simulate photoacoustic imaging in a computer, k-Wave is currently the most popular MATLAB toolbox. Lots of research groups choose k-Wave toolbox to perform the forward projection process, which also can be described as forward model. However, by solving complex partial differential equation, k-Wave suffers a lot from computation time. To accele"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.13050","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/2012.13050/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":"2026-07-05T02:01:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ce4JE3aLBgqCONicReRdt2tVuaej8bxlYBBCRhWq219FIsnnNRv3z81DihidGu05FuoCHlf2Qrc2gnOMp6W9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T04:12:22.134672Z"},"content_sha256":"27756a76a7f1ecb01508af44f41a9a39656a44af7c70161d0f6191e87687a50e","schema_version":"1.0","event_id":"sha256:27756a76a7f1ecb01508af44f41a9a39656a44af7c70161d0f6191e87687a50e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TSRJX3GNVKMK3YVTGRWG7W5Q4D/bundle.json","state_url":"https://pith.science/pith/TSRJX3GNVKMK3YVTGRWG7W5Q4D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TSRJX3GNVKMK3YVTGRWG7W5Q4D/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":"2026-08-17T04:12:22Z","links":{"resolver":"https://pith.science/pith/TSRJX3GNVKMK3YVTGRWG7W5Q4D","bundle":"https://pith.science/pith/TSRJX3GNVKMK3YVTGRWG7W5Q4D/bundle.json","state":"https://pith.science/pith/TSRJX3GNVKMK3YVTGRWG7W5Q4D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TSRJX3GNVKMK3YVTGRWG7W5Q4D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:TSRJX3GNVKMK3YVTGRWG7W5Q4D","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":"523b39e677389d3099a6a6aa328f97bc845a9dba5fcc1296b80ebbb93dcad6d9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2020-12-24T01:03:36Z","title_canon_sha256":"bb7c5bf2e940f20561ea69fb1aef0ccc150573ca0d0cb0ceb73bd5ca217bc577"},"schema_version":"1.0","source":{"id":"2012.13050","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.13050","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"arxiv_version","alias_value":"2012.13050v1","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.13050","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"pith_short_12","alias_value":"TSRJX3GNVKMK","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"pith_short_16","alias_value":"TSRJX3GNVKMK3YVT","created_at":"2026-07-05T02:01:47Z"},{"alias_kind":"pith_short_8","alias_value":"TSRJX3GN","created_at":"2026-07-05T02:01:47Z"}],"graph_snapshots":[{"event_id":"sha256:27756a76a7f1ecb01508af44f41a9a39656a44af7c70161d0f6191e87687a50e","target":"graph","created_at":"2026-07-05T02:01:47Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2012.13050/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Photoacoustic imaging develops very fast in recent years due to its superior performance in many preclinical and clinical applications. However, it is still in a developing stage, and a lot of experiments have to be performed in a simulation setting. To simulate photoacoustic imaging in a computer, k-Wave is currently the most popular MATLAB toolbox. Lots of research groups choose k-Wave toolbox to perform the forward projection process, which also can be described as forward model. However, by solving complex partial differential equation, k-Wave suffers a lot from computation time. To accele","authors_text":"Changchun Yang, Fei Gao, Feng Gao, Jiadong Zhang, Shanshan Guo, Tengbo Lyu, Yimeng Yang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2020-12-24T01:03:36Z","title":"Superposed Wave (s-Wave): Accelerating Photoacoustic Simulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.13050","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:a15a554223d199a2043508d26b3b8764813229d1c6983df74c6c0548d88cc117","target":"record","created_at":"2026-07-05T02:01:47Z","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":"523b39e677389d3099a6a6aa328f97bc845a9dba5fcc1296b80ebbb93dcad6d9","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2020-12-24T01:03:36Z","title_canon_sha256":"bb7c5bf2e940f20561ea69fb1aef0ccc150573ca0d0cb0ceb73bd5ca217bc577"},"schema_version":"1.0","source":{"id":"2012.13050","kind":"arxiv","version":1}},"canonical_sha256":"9ca29beccdaa98ade2b3346c6fdbb0e0f174c91c177423342c49e270da1c81b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ca29beccdaa98ade2b3346c6fdbb0e0f174c91c177423342c49e270da1c81b0","first_computed_at":"2026-07-05T02:01:47.211530Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:01:47.211530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BlRbHxbdTffUtpiN8E/aBuUkeeVv55WC4mp2qMoiChnTv09HGyWzPI5iJnDridHMMJ/dgjAXNobpv3U7saMOCw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:01:47.212144Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.13050","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a15a554223d199a2043508d26b3b8764813229d1c6983df74c6c0548d88cc117","sha256:27756a76a7f1ecb01508af44f41a9a39656a44af7c70161d0f6191e87687a50e"],"state_sha256":"ceb717e3cb6aaeb7b4d4252643810abbd4872967d98c829edb42f8dabb102a0e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rj4skO2MeA8XO9Y3bJ0vUM+DiZ3nUlBgPkSbthEGLbHfUuTMoJ8TH9dwrkQsVdmjqYZh5UrBpnOLj2QT2gLjBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T04:12:22.141021Z","bundle_sha256":"5ba224428ecab911ed1989f5dd1a5e3760bbde86680534fcafd2a8dec5a2d698"}}