{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:OEQDRFOJVXD2IX3VQCG373XYSV","short_pith_number":"pith:OEQDRFOJ","canonical_record":{"source":{"id":"1303.0453","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-03-03T03:29:04Z","cross_cats_sorted":[],"title_canon_sha256":"f2120e963d9646d8e465a062bee2b2e05e44fd93f514b611361e7b59ea3662ba","abstract_canon_sha256":"e21c750b962da88995b8ba53a66605a3a16abc42733bdbe16769ee4f5ee38de5"},"schema_version":"1.0"},"canonical_sha256":"71203895c9adc7a45f75808dbfeef89563b975773a9c8b0f88bebd290bf10ed5","source":{"kind":"arxiv","id":"1303.0453","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.0453","created_at":"2026-05-18T01:51:17Z"},{"alias_kind":"arxiv_version","alias_value":"1303.0453v1","created_at":"2026-05-18T01:51:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.0453","created_at":"2026-05-18T01:51:17Z"},{"alias_kind":"pith_short_12","alias_value":"OEQDRFOJVXD2","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OEQDRFOJVXD2IX3V","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OEQDRFOJ","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:OEQDRFOJVXD2IX3VQCG373XYSV","target":"record","payload":{"canonical_record":{"source":{"id":"1303.0453","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-03-03T03:29:04Z","cross_cats_sorted":[],"title_canon_sha256":"f2120e963d9646d8e465a062bee2b2e05e44fd93f514b611361e7b59ea3662ba","abstract_canon_sha256":"e21c750b962da88995b8ba53a66605a3a16abc42733bdbe16769ee4f5ee38de5"},"schema_version":"1.0"},"canonical_sha256":"71203895c9adc7a45f75808dbfeef89563b975773a9c8b0f88bebd290bf10ed5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:17.781967Z","signature_b64":"NA5pXnMVZCePKuJtrRtBRL5h6ITvHKxvoVYMX5kNfczsmsmswjL0dxPj+SYrj0YIbeJIUIeebQbdr0LRVdELCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"71203895c9adc7a45f75808dbfeef89563b975773a9c8b0f88bebd290bf10ed5","last_reissued_at":"2026-05-18T01:51:17.781295Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:17.781295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.0453","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":"2026-05-18T01:51:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iQXxIt6vHacdZLjKac8+xtMhOoxfOuxXPbqb/TGbNV62njY5PFIAUzTJWYGO++Sr1rOtSYEiQiJj3PMZVLo1DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T19:16:49.793731Z"},"content_sha256":"ba46af853444a07e79936d99cabe15a20954c78080c9e825ff2ada37992a6302","schema_version":"1.0","event_id":"sha256:ba46af853444a07e79936d99cabe15a20954c78080c9e825ff2ada37992a6302"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:OEQDRFOJVXD2IX3VQCG373XYSV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Biophysics software for interdisciplinary education and research","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.ed-ph","authors_text":"J.M. Deutsch","submitted_at":"2013-03-03T03:29:04Z","abstract_excerpt":"Biophysics is a subject that is spread over many disciplines and transcends the skills and knowledge of the individual student. This makes it challenging both to teach and to learn. Educational materials are described to aid in teaching undergraduates biophysics in an interdisciplinary manner. Projects have been devised on topics that range from x-ray diffraction to the Hodgkin Huxley equations. They are team-based and encourage collaboration. The projects make extensive use of software written in Python/Scipy which can be modified to explore a large range of possible phenomena. The software c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.0453","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":"2026-05-18T01:51:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0/SR9YM47gPq+Kwzj4vwgm9YpM/IUPvAzlX1NmiDZlDRCul2rCwrd+h+67746d6kVuJiNbymv4mi3YRfsz0QAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-27T19:16:49.794066Z"},"content_sha256":"ebf3063ac1b484a7db7afa69ca212cb127c76f833dcc991bf0e6a3cd1d3fa236","schema_version":"1.0","event_id":"sha256:ebf3063ac1b484a7db7afa69ca212cb127c76f833dcc991bf0e6a3cd1d3fa236"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OEQDRFOJVXD2IX3VQCG373XYSV/bundle.json","state_url":"https://pith.science/pith/OEQDRFOJVXD2IX3VQCG373XYSV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OEQDRFOJVXD2IX3VQCG373XYSV/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":"2026-06-27T19:16:49Z","links":{"resolver":"https://pith.science/pith/OEQDRFOJVXD2IX3VQCG373XYSV","bundle":"https://pith.science/pith/OEQDRFOJVXD2IX3VQCG373XYSV/bundle.json","state":"https://pith.science/pith/OEQDRFOJVXD2IX3VQCG373XYSV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OEQDRFOJVXD2IX3VQCG373XYSV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:OEQDRFOJVXD2IX3VQCG373XYSV","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":"e21c750b962da88995b8ba53a66605a3a16abc42733bdbe16769ee4f5ee38de5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-03-03T03:29:04Z","title_canon_sha256":"f2120e963d9646d8e465a062bee2b2e05e44fd93f514b611361e7b59ea3662ba"},"schema_version":"1.0","source":{"id":"1303.0453","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.0453","created_at":"2026-05-18T01:51:17Z"},{"alias_kind":"arxiv_version","alias_value":"1303.0453v1","created_at":"2026-05-18T01:51:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.0453","created_at":"2026-05-18T01:51:17Z"},{"alias_kind":"pith_short_12","alias_value":"OEQDRFOJVXD2","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OEQDRFOJVXD2IX3V","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OEQDRFOJ","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:ebf3063ac1b484a7db7afa69ca212cb127c76f833dcc991bf0e6a3cd1d3fa236","target":"graph","created_at":"2026-05-18T01:51:17Z","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":"Biophysics is a subject that is spread over many disciplines and transcends the skills and knowledge of the individual student. This makes it challenging both to teach and to learn. Educational materials are described to aid in teaching undergraduates biophysics in an interdisciplinary manner. Projects have been devised on topics that range from x-ray diffraction to the Hodgkin Huxley equations. They are team-based and encourage collaboration. The projects make extensive use of software written in Python/Scipy which can be modified to explore a large range of possible phenomena. The software c","authors_text":"J.M. Deutsch","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-03-03T03:29:04Z","title":"Biophysics software for interdisciplinary education and research"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.0453","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:ba46af853444a07e79936d99cabe15a20954c78080c9e825ff2ada37992a6302","target":"record","created_at":"2026-05-18T01:51:17Z","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":"e21c750b962da88995b8ba53a66605a3a16abc42733bdbe16769ee4f5ee38de5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2013-03-03T03:29:04Z","title_canon_sha256":"f2120e963d9646d8e465a062bee2b2e05e44fd93f514b611361e7b59ea3662ba"},"schema_version":"1.0","source":{"id":"1303.0453","kind":"arxiv","version":1}},"canonical_sha256":"71203895c9adc7a45f75808dbfeef89563b975773a9c8b0f88bebd290bf10ed5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"71203895c9adc7a45f75808dbfeef89563b975773a9c8b0f88bebd290bf10ed5","first_computed_at":"2026-05-18T01:51:17.781295Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:17.781295Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NA5pXnMVZCePKuJtrRtBRL5h6ITvHKxvoVYMX5kNfczsmsmswjL0dxPj+SYrj0YIbeJIUIeebQbdr0LRVdELCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:17.781967Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.0453","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ba46af853444a07e79936d99cabe15a20954c78080c9e825ff2ada37992a6302","sha256:ebf3063ac1b484a7db7afa69ca212cb127c76f833dcc991bf0e6a3cd1d3fa236"],"state_sha256":"c66d5a11fefb4f3d62165789e6a6c0582e1437b0daf77c7f8b373d733b005795"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zBrYAYYdGIOgnxj8OBukg4+Isgph1tRuYdPv8k5F7BZCYY5piDLgj/sDXI6BkFRRWK2Eo9JV2ifBC9OV1vqSAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-27T19:16:49.795909Z","bundle_sha256":"8bcbbd1ec20632812cf7342cd24a968c22943cb80b6613774be5a0ba7ad09647"}}