{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:ZMEM25QU7S4NU6G7XCVZGBY7KN","short_pith_number":"pith:ZMEM25QU","canonical_record":{"source":{"id":"2607.18276","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2026-06-25T13:59:22Z","cross_cats_sorted":["physics.data-an","physics.med-ph","physics.soc-ph"],"title_canon_sha256":"ad801719c4e9a866875ce1172a26a8b3ec215ced50ba7c0850afbd7fb6befbde","abstract_canon_sha256":"f7cc79cb65b0179b5f1f7b0fd369da0e130eda609fafa4cfd38bbfbacd78dfd0"},"schema_version":"1.0"},"canonical_sha256":"cb08cd7614fcb8da78dfb8ab93071f534e2a1d6f607d684aa3aafca57b9b39f3","source":{"kind":"arxiv","id":"2607.18276","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.18276","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"arxiv_version","alias_value":"2607.18276v1","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.18276","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"pith_short_12","alias_value":"ZMEM25QU7S4N","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"pith_short_16","alias_value":"ZMEM25QU7S4NU6G7","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"pith_short_8","alias_value":"ZMEM25QU","created_at":"2026-07-22T00:22:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:ZMEM25QU7S4NU6G7XCVZGBY7KN","target":"record","payload":{"canonical_record":{"source":{"id":"2607.18276","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2026-06-25T13:59:22Z","cross_cats_sorted":["physics.data-an","physics.med-ph","physics.soc-ph"],"title_canon_sha256":"ad801719c4e9a866875ce1172a26a8b3ec215ced50ba7c0850afbd7fb6befbde","abstract_canon_sha256":"f7cc79cb65b0179b5f1f7b0fd369da0e130eda609fafa4cfd38bbfbacd78dfd0"},"schema_version":"1.0"},"canonical_sha256":"cb08cd7614fcb8da78dfb8ab93071f534e2a1d6f607d684aa3aafca57b9b39f3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-22T00:22:39.707410Z","signature_b64":"MSIYrl49bu28SzLYcn77TBUI+hv7CvMY2rG8fSxGGuF7EacBwza2p0BD45fOeay3/rctYFLycEJ7fDI185hfAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb08cd7614fcb8da78dfb8ab93071f534e2a1d6f607d684aa3aafca57b9b39f3","last_reissued_at":"2026-07-22T00:22:39.706680Z","signature_status":"signed_v1","first_computed_at":"2026-07-22T00:22:39.706680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.18276","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":"2026-07-22T00:22:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VWpFULlA9mN5797wzANxVevvHCvrzD/PqPEdBGy4UcQQvsNllxAxjQP85I3mYWuucStpMYE+xOjo9IGA7PaqBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T18:41:46.191696Z"},"content_sha256":"29b171bee0545288beef05f3d694166df96274b746f235b7dc23c28a88744908","schema_version":"1.0","event_id":"sha256:29b171bee0545288beef05f3d694166df96274b746f235b7dc23c28a88744908"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:ZMEM25QU7S4NU6G7XCVZGBY7KN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improving Punching \"Power\": Reconsidering the roles of initial strike velocity and effective mass","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.data-an","physics.med-ph","physics.soc-ph"],"primary_cat":"physics.pop-ph","authors_text":"Joseph L. Natale","submitted_at":"2026-06-25T13:59:22Z","abstract_excerpt":"We review the principal features of one-dimensional, elastic collisions pertinent to modeling strike-mediated impacts in martial arts and combat sports contexts. Arguing for the post-collision velocity of a stationary, target mass as a useful proxy for determining overall punch efficacy, we demonstrate that pre-collision velocities for real strikes are bounded, such that speed prior to impact has a more limited effect on the impulse experienced by said target than suggested by supporting literature. We find that the value of incoming, \"effective\" mass -- despite eluding uniform establishment c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.18276","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/2607.18276/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":"2026-07-22T00:22:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0vV+MxOaRsibYU/+8IJgRQtJugqiqTESzjIBFMnoUGOKcMnpdOaoU4VVZbMJ+zMoOR1sZqXk08ewPN6Ms0yrDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-22T18:41:46.192291Z"},"content_sha256":"6ecfa9fbfe0ea5d89ce31fa3ea2264ad4157b78ae09afebf202ac74df11f4095","schema_version":"1.0","event_id":"sha256:6ecfa9fbfe0ea5d89ce31fa3ea2264ad4157b78ae09afebf202ac74df11f4095"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZMEM25QU7S4NU6G7XCVZGBY7KN/bundle.json","state_url":"https://pith.science/pith/ZMEM25QU7S4NU6G7XCVZGBY7KN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZMEM25QU7S4NU6G7XCVZGBY7KN/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":"2026-08-22T18:41:46Z","links":{"resolver":"https://pith.science/pith/ZMEM25QU7S4NU6G7XCVZGBY7KN","bundle":"https://pith.science/pith/ZMEM25QU7S4NU6G7XCVZGBY7KN/bundle.json","state":"https://pith.science/pith/ZMEM25QU7S4NU6G7XCVZGBY7KN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZMEM25QU7S4NU6G7XCVZGBY7KN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:ZMEM25QU7S4NU6G7XCVZGBY7KN","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":"f7cc79cb65b0179b5f1f7b0fd369da0e130eda609fafa4cfd38bbfbacd78dfd0","cross_cats_sorted":["physics.data-an","physics.med-ph","physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2026-06-25T13:59:22Z","title_canon_sha256":"ad801719c4e9a866875ce1172a26a8b3ec215ced50ba7c0850afbd7fb6befbde"},"schema_version":"1.0","source":{"id":"2607.18276","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.18276","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"arxiv_version","alias_value":"2607.18276v1","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.18276","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"pith_short_12","alias_value":"ZMEM25QU7S4N","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"pith_short_16","alias_value":"ZMEM25QU7S4NU6G7","created_at":"2026-07-22T00:22:39Z"},{"alias_kind":"pith_short_8","alias_value":"ZMEM25QU","created_at":"2026-07-22T00:22:39Z"}],"graph_snapshots":[{"event_id":"sha256:6ecfa9fbfe0ea5d89ce31fa3ea2264ad4157b78ae09afebf202ac74df11f4095","target":"graph","created_at":"2026-07-22T00:22:39Z","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/2607.18276/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We review the principal features of one-dimensional, elastic collisions pertinent to modeling strike-mediated impacts in martial arts and combat sports contexts. Arguing for the post-collision velocity of a stationary, target mass as a useful proxy for determining overall punch efficacy, we demonstrate that pre-collision velocities for real strikes are bounded, such that speed prior to impact has a more limited effect on the impulse experienced by said target than suggested by supporting literature. We find that the value of incoming, \"effective\" mass -- despite eluding uniform establishment c","authors_text":"Joseph L. Natale","cross_cats":["physics.data-an","physics.med-ph","physics.soc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2026-06-25T13:59:22Z","title":"Improving Punching \"Power\": Reconsidering the roles of initial strike velocity and effective mass"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.18276","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":"sha256:29b171bee0545288beef05f3d694166df96274b746f235b7dc23c28a88744908","target":"record","created_at":"2026-07-22T00:22:39Z","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":"f7cc79cb65b0179b5f1f7b0fd369da0e130eda609fafa4cfd38bbfbacd78dfd0","cross_cats_sorted":["physics.data-an","physics.med-ph","physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.pop-ph","submitted_at":"2026-06-25T13:59:22Z","title_canon_sha256":"ad801719c4e9a866875ce1172a26a8b3ec215ced50ba7c0850afbd7fb6befbde"},"schema_version":"1.0","source":{"id":"2607.18276","kind":"arxiv","version":1}},"canonical_sha256":"cb08cd7614fcb8da78dfb8ab93071f534e2a1d6f607d684aa3aafca57b9b39f3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb08cd7614fcb8da78dfb8ab93071f534e2a1d6f607d684aa3aafca57b9b39f3","first_computed_at":"2026-07-22T00:22:39.706680Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-22T00:22:39.706680Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MSIYrl49bu28SzLYcn77TBUI+hv7CvMY2rG8fSxGGuF7EacBwza2p0BD45fOeay3/rctYFLycEJ7fDI185hfAw==","signature_status":"signed_v1","signed_at":"2026-07-22T00:22:39.707410Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.18276","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:29b171bee0545288beef05f3d694166df96274b746f235b7dc23c28a88744908","sha256:6ecfa9fbfe0ea5d89ce31fa3ea2264ad4157b78ae09afebf202ac74df11f4095"],"state_sha256":"aef3c5b977bcd74c09b77b4aded26eaeed459656421ea7c2fe59441a27423695"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sgvapAzMIQKqQpLOhDFE1jfn7xVgiJL9YvrF/7Cy0WGeP1Pf1276BH0UW+RZP8oyPJXWM0q6LPG73vOhP7+9Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-22T18:41:46.197033Z","bundle_sha256":"bdc21937a56166cf3b6ae3efd98f86966e89ea549742205c66dfc3d97b4e00d1"}}