{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WWGCRRFB5MYMUFBF7LGXPZTX3J","short_pith_number":"pith:WWGCRRFB","canonical_record":{"source":{"id":"1504.06674","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-04-25T02:20:46Z","cross_cats_sorted":[],"title_canon_sha256":"24ba9bf6a4ab2241af3f951f96772f536af23dbe694b6f4e32ae2a988c0d2233","abstract_canon_sha256":"d4908646b7348369d2e1bf7a1493209eb2c29cb5ec8b6f565f114d1c6812c91d"},"schema_version":"1.0"},"canonical_sha256":"b58c28c4a1eb30ca1425facd77e677da4c09a1934d204813e6856e4d336a77cd","source":{"kind":"arxiv","id":"1504.06674","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.06674","created_at":"2026-05-18T00:57:18Z"},{"alias_kind":"arxiv_version","alias_value":"1504.06674v3","created_at":"2026-05-18T00:57:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.06674","created_at":"2026-05-18T00:57:18Z"},{"alias_kind":"pith_short_12","alias_value":"WWGCRRFB5MYM","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WWGCRRFB5MYMUFBF","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WWGCRRFB","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WWGCRRFB5MYMUFBF7LGXPZTX3J","target":"record","payload":{"canonical_record":{"source":{"id":"1504.06674","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-04-25T02:20:46Z","cross_cats_sorted":[],"title_canon_sha256":"24ba9bf6a4ab2241af3f951f96772f536af23dbe694b6f4e32ae2a988c0d2233","abstract_canon_sha256":"d4908646b7348369d2e1bf7a1493209eb2c29cb5ec8b6f565f114d1c6812c91d"},"schema_version":"1.0"},"canonical_sha256":"b58c28c4a1eb30ca1425facd77e677da4c09a1934d204813e6856e4d336a77cd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:57:18.518667Z","signature_b64":"9rhIS0KkrAKx8lnENm/Ka+4OIjPUpgy7Mlx0BaRlqpbIsLeIkiugm79UOrl3omYajLnjMUtuxykJVm/I8TKuAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b58c28c4a1eb30ca1425facd77e677da4c09a1934d204813e6856e4d336a77cd","last_reissued_at":"2026-05-18T00:57:18.517951Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:57:18.517951Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.06674","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:57:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dggYNo+wn6WKheShvyL7rGxyD6fMqUK90QXjiPKHalHmDIBtioZ9c9V18nvwm8RHLq4fJcuyhXtYd/Nl9LpSBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:47:22.973741Z"},"content_sha256":"4e462e8d1ffcef8b4a46a49b8fa91a9c2c0ba29300988d86ecaffe1bc571ceaa","schema_version":"1.0","event_id":"sha256:4e462e8d1ffcef8b4a46a49b8fa91a9c2c0ba29300988d86ecaffe1bc571ceaa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WWGCRRFB5MYMUFBF7LGXPZTX3J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On pressure impulse of a laser-induced underwater shock wave","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.flu-dyn","authors_text":"Keisuke Hayasaka, Masaharu Kameda, Shota Yamamoto, Yoshiyuki Tagawa","submitted_at":"2015-04-25T02:20:46Z","abstract_excerpt":"We experimentally examine a laser-induced underwater shock wave with a special attention to pressure impulse, the time integral of pressure evolution. %total pressure variation associated with the shock wave. Plasma formation, shock-wave expansion, and pressure in water are observed simultaneously using a combined measurement system that obtains high-resolution nanosecond-order image sequences. These detailed measurements reveal a non-spherically-symmetric distribution of pressure peak. In contrast, remarkably, pressure impulse is found to distribute symmetrically for a wide range of experimen"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.06674","kind":"arxiv","version":3},"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":"2026-05-18T00:57:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"M5+2tbruDa8ZCev92rABIT/tXSx2VmWV8aeEiLYlnanOKedZKdzUgE2sJD7ocFUSlgNGltDpxVdQMVIT5vkTDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T19:47:22.974107Z"},"content_sha256":"36f95bb9becacff8199ef36235c83347224f6e20d0d2bed89e0442c7e287180a","schema_version":"1.0","event_id":"sha256:36f95bb9becacff8199ef36235c83347224f6e20d0d2bed89e0442c7e287180a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WWGCRRFB5MYMUFBF7LGXPZTX3J/bundle.json","state_url":"https://pith.science/pith/WWGCRRFB5MYMUFBF7LGXPZTX3J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WWGCRRFB5MYMUFBF7LGXPZTX3J/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":"2026-05-27T19:47:22Z","links":{"resolver":"https://pith.science/pith/WWGCRRFB5MYMUFBF7LGXPZTX3J","bundle":"https://pith.science/pith/WWGCRRFB5MYMUFBF7LGXPZTX3J/bundle.json","state":"https://pith.science/pith/WWGCRRFB5MYMUFBF7LGXPZTX3J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WWGCRRFB5MYMUFBF7LGXPZTX3J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WWGCRRFB5MYMUFBF7LGXPZTX3J","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":"d4908646b7348369d2e1bf7a1493209eb2c29cb5ec8b6f565f114d1c6812c91d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-04-25T02:20:46Z","title_canon_sha256":"24ba9bf6a4ab2241af3f951f96772f536af23dbe694b6f4e32ae2a988c0d2233"},"schema_version":"1.0","source":{"id":"1504.06674","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.06674","created_at":"2026-05-18T00:57:18Z"},{"alias_kind":"arxiv_version","alias_value":"1504.06674v3","created_at":"2026-05-18T00:57:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.06674","created_at":"2026-05-18T00:57:18Z"},{"alias_kind":"pith_short_12","alias_value":"WWGCRRFB5MYM","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WWGCRRFB5MYMUFBF","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WWGCRRFB","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:36f95bb9becacff8199ef36235c83347224f6e20d0d2bed89e0442c7e287180a","target":"graph","created_at":"2026-05-18T00:57:18Z","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":"We experimentally examine a laser-induced underwater shock wave with a special attention to pressure impulse, the time integral of pressure evolution. %total pressure variation associated with the shock wave. Plasma formation, shock-wave expansion, and pressure in water are observed simultaneously using a combined measurement system that obtains high-resolution nanosecond-order image sequences. These detailed measurements reveal a non-spherically-symmetric distribution of pressure peak. In contrast, remarkably, pressure impulse is found to distribute symmetrically for a wide range of experimen","authors_text":"Keisuke Hayasaka, Masaharu Kameda, Shota Yamamoto, Yoshiyuki Tagawa","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-04-25T02:20:46Z","title":"On pressure impulse of a laser-induced underwater shock wave"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.06674","kind":"arxiv","version":3},"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":"sha256:4e462e8d1ffcef8b4a46a49b8fa91a9c2c0ba29300988d86ecaffe1bc571ceaa","target":"record","created_at":"2026-05-18T00:57:18Z","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":"d4908646b7348369d2e1bf7a1493209eb2c29cb5ec8b6f565f114d1c6812c91d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.flu-dyn","submitted_at":"2015-04-25T02:20:46Z","title_canon_sha256":"24ba9bf6a4ab2241af3f951f96772f536af23dbe694b6f4e32ae2a988c0d2233"},"schema_version":"1.0","source":{"id":"1504.06674","kind":"arxiv","version":3}},"canonical_sha256":"b58c28c4a1eb30ca1425facd77e677da4c09a1934d204813e6856e4d336a77cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b58c28c4a1eb30ca1425facd77e677da4c09a1934d204813e6856e4d336a77cd","first_computed_at":"2026-05-18T00:57:18.517951Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:57:18.517951Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9rhIS0KkrAKx8lnENm/Ka+4OIjPUpgy7Mlx0BaRlqpbIsLeIkiugm79UOrl3omYajLnjMUtuxykJVm/I8TKuAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:57:18.518667Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.06674","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e462e8d1ffcef8b4a46a49b8fa91a9c2c0ba29300988d86ecaffe1bc571ceaa","sha256:36f95bb9becacff8199ef36235c83347224f6e20d0d2bed89e0442c7e287180a"],"state_sha256":"9d3433ac538af17c41fafe179aedb32934fdc4faf595ffc00f2611fa29a06468"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gosT8ODHRr0stazu0VvqQQvOkX9xYtvtZG/W0o9x1FrpmiInQ17722DaZG1mbA5O2a+H/aTW8FTsu/HFruBRDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T19:47:22.976727Z","bundle_sha256":"c65bc86cc067274f4ac2ee0cd4e3b3a417260cfc32f18047c3743222ee1427bd"}}