{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:624YB5MZFLRMWAD4SYT3SNUHB3","short_pith_number":"pith:624YB5MZ","canonical_record":{"source":{"id":"1408.5992","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.ed-ph","submitted_at":"2014-08-26T03:06:17Z","cross_cats_sorted":[],"title_canon_sha256":"43fe3500e6b3fe983a66c44f87ece0ae4c3831abe5d01e321a76c38560e90adb","abstract_canon_sha256":"eb300ab57b6e99745c18eb78f846fbe282c7498d09331fc19fd15793c80c7a55"},"schema_version":"1.0"},"canonical_sha256":"f6b980f5992ae2cb007c9627b936870ee3f86a6945d20a2b99e88d966079459d","source":{"kind":"arxiv","id":"1408.5992","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.5992","created_at":"2026-05-18T02:44:15Z"},{"alias_kind":"arxiv_version","alias_value":"1408.5992v1","created_at":"2026-05-18T02:44:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.5992","created_at":"2026-05-18T02:44:15Z"},{"alias_kind":"pith_short_12","alias_value":"624YB5MZFLRM","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"624YB5MZFLRMWAD4","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"624YB5MZ","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:624YB5MZFLRMWAD4SYT3SNUHB3","target":"record","payload":{"canonical_record":{"source":{"id":"1408.5992","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.ed-ph","submitted_at":"2014-08-26T03:06:17Z","cross_cats_sorted":[],"title_canon_sha256":"43fe3500e6b3fe983a66c44f87ece0ae4c3831abe5d01e321a76c38560e90adb","abstract_canon_sha256":"eb300ab57b6e99745c18eb78f846fbe282c7498d09331fc19fd15793c80c7a55"},"schema_version":"1.0"},"canonical_sha256":"f6b980f5992ae2cb007c9627b936870ee3f86a6945d20a2b99e88d966079459d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:44:15.256838Z","signature_b64":"sm+8o+ca1It8XKgqE5ctQ1LMYfQUCBi+l2fph2PFtEMb8E7dvCFkrPYP9Dj3b/qsFUEaeMEYBbqiL7QZkbLFBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6b980f5992ae2cb007c9627b936870ee3f86a6945d20a2b99e88d966079459d","last_reissued_at":"2026-05-18T02:44:15.256394Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:44:15.256394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1408.5992","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":"2026-05-18T02:44:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CU5ZG15NKeD1Wd4zYafcdOKYrhJb3qx8KBcB1bbdkXDNFr3rtdlNMETonvtnaTfLINgbnKgSq121peg3D5VqDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T07:44:01.318222Z"},"content_sha256":"4bd39585ae1c0ef95c842d575d23df444a99d4255e2141188231b8bc61a14c83","schema_version":"1.0","event_id":"sha256:4bd39585ae1c0ef95c842d575d23df444a99d4255e2141188231b8bc61a14c83"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:624YB5MZFLRMWAD4SYT3SNUHB3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Open Educational Resources from Performance Task using Video Analysis and Modeling - Tracker and K12 science education framework","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"physics.ed-ph","authors_text":"Loo Kang Wee","submitted_at":"2014-08-26T03:06:17Z","abstract_excerpt":"This invited paper discusses why Physics performance task by grade 9 students in Singapore is worth participating in for two reasons; 1) the video analysis and modeling are open access, licensed creative commons attribution for advancing open educational resources in the world and 2) allows students to be like physicists, where the K12 science education framework is adopted. Personal reflections on how physics education can be made more meaningful in particular Practice 1: Ask Questions, Practice 2: Use Models and Practice 5: Mathematical and Computational Thinking using Video Modeling support"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.5992","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":"2026-05-18T02:44:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hsOu003T/dt875A9tOxomTcTrrgj93sHDZOdLQh+p1MO5bl4XHQSVkcBRZKOhhH62xTMpLTDm526Ve/86S6TAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-01T07:44:01.318579Z"},"content_sha256":"bee4616db1e741e81c01b93a0799cfad026731b707f4924832e1512abbe8f4a0","schema_version":"1.0","event_id":"sha256:bee4616db1e741e81c01b93a0799cfad026731b707f4924832e1512abbe8f4a0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/624YB5MZFLRMWAD4SYT3SNUHB3/bundle.json","state_url":"https://pith.science/pith/624YB5MZFLRMWAD4SYT3SNUHB3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/624YB5MZFLRMWAD4SYT3SNUHB3/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":"2026-07-01T07:44:01Z","links":{"resolver":"https://pith.science/pith/624YB5MZFLRMWAD4SYT3SNUHB3","bundle":"https://pith.science/pith/624YB5MZFLRMWAD4SYT3SNUHB3/bundle.json","state":"https://pith.science/pith/624YB5MZFLRMWAD4SYT3SNUHB3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/624YB5MZFLRMWAD4SYT3SNUHB3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:624YB5MZFLRMWAD4SYT3SNUHB3","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":"eb300ab57b6e99745c18eb78f846fbe282c7498d09331fc19fd15793c80c7a55","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.ed-ph","submitted_at":"2014-08-26T03:06:17Z","title_canon_sha256":"43fe3500e6b3fe983a66c44f87ece0ae4c3831abe5d01e321a76c38560e90adb"},"schema_version":"1.0","source":{"id":"1408.5992","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1408.5992","created_at":"2026-05-18T02:44:15Z"},{"alias_kind":"arxiv_version","alias_value":"1408.5992v1","created_at":"2026-05-18T02:44:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.5992","created_at":"2026-05-18T02:44:15Z"},{"alias_kind":"pith_short_12","alias_value":"624YB5MZFLRM","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"624YB5MZFLRMWAD4","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"624YB5MZ","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:bee4616db1e741e81c01b93a0799cfad026731b707f4924832e1512abbe8f4a0","target":"graph","created_at":"2026-05-18T02:44:15Z","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":"This invited paper discusses why Physics performance task by grade 9 students in Singapore is worth participating in for two reasons; 1) the video analysis and modeling are open access, licensed creative commons attribution for advancing open educational resources in the world and 2) allows students to be like physicists, where the K12 science education framework is adopted. Personal reflections on how physics education can be made more meaningful in particular Practice 1: Ask Questions, Practice 2: Use Models and Practice 5: Mathematical and Computational Thinking using Video Modeling support","authors_text":"Loo Kang Wee","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.ed-ph","submitted_at":"2014-08-26T03:06:17Z","title":"Open Educational Resources from Performance Task using Video Analysis and Modeling - Tracker and K12 science education framework"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.5992","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":"sha256:4bd39585ae1c0ef95c842d575d23df444a99d4255e2141188231b8bc61a14c83","target":"record","created_at":"2026-05-18T02:44:15Z","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":"eb300ab57b6e99745c18eb78f846fbe282c7498d09331fc19fd15793c80c7a55","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"physics.ed-ph","submitted_at":"2014-08-26T03:06:17Z","title_canon_sha256":"43fe3500e6b3fe983a66c44f87ece0ae4c3831abe5d01e321a76c38560e90adb"},"schema_version":"1.0","source":{"id":"1408.5992","kind":"arxiv","version":1}},"canonical_sha256":"f6b980f5992ae2cb007c9627b936870ee3f86a6945d20a2b99e88d966079459d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6b980f5992ae2cb007c9627b936870ee3f86a6945d20a2b99e88d966079459d","first_computed_at":"2026-05-18T02:44:15.256394Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:44:15.256394Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"sm+8o+ca1It8XKgqE5ctQ1LMYfQUCBi+l2fph2PFtEMb8E7dvCFkrPYP9Dj3b/qsFUEaeMEYBbqiL7QZkbLFBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:44:15.256838Z","signed_message":"canonical_sha256_bytes"},"source_id":"1408.5992","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4bd39585ae1c0ef95c842d575d23df444a99d4255e2141188231b8bc61a14c83","sha256:bee4616db1e741e81c01b93a0799cfad026731b707f4924832e1512abbe8f4a0"],"state_sha256":"836a781709cb45450be7911930e78c896a9d5cb1229deb37465bf9e828d71cf4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"czES1PbByqOAHbNTwfg5V4rU1ff1P+dicvWpqtC8NNjH9bv5F+hbaIcMAjvEOMet0e5K23gZ+JrFV/GaDWjDBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-01T07:44:01.320571Z","bundle_sha256":"96f37517e61d9ea7ccb6ee34fc761ce9ebe150bbed8a4c234ef4f74714987d3b"}}