{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:AM75TORHXAY2U4SXMYZOQ67E33","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":"cda34d735c60c2ed717e3aa0b267db90cc09cbb56fda9447322f2427c080ea0d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2026-05-27T06:07:43Z","title_canon_sha256":"951e5074e09627fe22c1c219539c0c2838a8cb986d65f474c1a84c61c1030da1"},"schema_version":"1.0","source":{"id":"2605.28011","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.28011","created_at":"2026-05-28T01:04:55Z"},{"alias_kind":"arxiv_version","alias_value":"2605.28011v1","created_at":"2026-05-28T01:04:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.28011","created_at":"2026-05-28T01:04:55Z"},{"alias_kind":"pith_short_12","alias_value":"AM75TORHXAY2","created_at":"2026-05-28T01:04:55Z"},{"alias_kind":"pith_short_16","alias_value":"AM75TORHXAY2U4SX","created_at":"2026-05-28T01:04:55Z"},{"alias_kind":"pith_short_8","alias_value":"AM75TORH","created_at":"2026-05-28T01:04:55Z"}],"graph_snapshots":[{"event_id":"sha256:6a640511ad683ffbf82d0f24088c1249b4cf6d6caf4e480f57ab7c4ed63d703e","target":"graph","created_at":"2026-05-28T01:04:55Z","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/2605.28011/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantifying impact phenomena in badminton smashes is important for evaluating both athletic performance and equipment; however, conventional measurement systems involve trade-offs between temporal resolution, data efficiency, and preparation effort. This study proposes a measurement method using two synchronized event cameras to automatically estimate impact time, impact location on the racket face, and post-impact shuttlecock speed in an integrated manner within the same trial. The swing interval was detected from event rate statistics, impact time was estimated from the shuttlecock trajector","authors_text":"Kai Ishibe, Ryoma Yasuda, Sakiko Hashimoto, Yudai Washida, Yuto Kase","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2026-05-27T06:07:43Z","title":"Automated Estimation of Impact Time, Impact Location, and Shuttlecock Speed in Badminton Smashes Using Event Cameras"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.28011","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:c8728c35e92ae2478d6ab338a45f6a23b087c174cbce5c04eabf1cf0359a0143","target":"record","created_at":"2026-05-28T01:04:55Z","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":"cda34d735c60c2ed717e3aa0b267db90cc09cbb56fda9447322f2427c080ea0d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cs.CV","submitted_at":"2026-05-27T06:07:43Z","title_canon_sha256":"951e5074e09627fe22c1c219539c0c2838a8cb986d65f474c1a84c61c1030da1"},"schema_version":"1.0","source":{"id":"2605.28011","kind":"arxiv","version":1}},"canonical_sha256":"033fd9ba27b831aa72576632e87be4ded0f7e3cc01052342c824c8b33b42f22f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"033fd9ba27b831aa72576632e87be4ded0f7e3cc01052342c824c8b33b42f22f","first_computed_at":"2026-05-28T01:04:55.931777Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-28T01:04:55.931777Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PQ89UORWexf3k2XJuzAXmDksuEJ0gNMosjl0/IXE8U7gI+tdafDwscnUwwlmWIEyCWtHYk/3NQTizl17f7RQBw==","signature_status":"signed_v1","signed_at":"2026-05-28T01:04:55.932213Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.28011","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8728c35e92ae2478d6ab338a45f6a23b087c174cbce5c04eabf1cf0359a0143","sha256:6a640511ad683ffbf82d0f24088c1249b4cf6d6caf4e480f57ab7c4ed63d703e"],"state_sha256":"135aeeae962d336a25f803ba3102dade8dd13023fa224015e697dc200a920046"}