{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:YQPY7LETYBTRSTIZV37B3GBB5W","short_pith_number":"pith:YQPY7LET","canonical_record":{"source":{"id":"1409.3850","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-09-12T20:04:50Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"eadb0385240af32a4431bab76be54c956eeeecbe5a37fdd3b606a947003797f5","abstract_canon_sha256":"35aac4ba525661bc70fb3ce3ffa435e9975d5a908a36ca395ac47569cc95cfbc"},"schema_version":"1.0"},"canonical_sha256":"c41f8fac93c067194d19aefe1d9821edafd327ca5a8c5e41339b0fb1539a5c5a","source":{"kind":"arxiv","id":"1409.3850","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.3850","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"arxiv_version","alias_value":"1409.3850v3","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.3850","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"pith_short_12","alias_value":"YQPY7LETYBTR","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YQPY7LETYBTRSTIZ","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YQPY7LET","created_at":"2026-05-18T12:28:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:YQPY7LETYBTRSTIZV37B3GBB5W","target":"record","payload":{"canonical_record":{"source":{"id":"1409.3850","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-09-12T20:04:50Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"eadb0385240af32a4431bab76be54c956eeeecbe5a37fdd3b606a947003797f5","abstract_canon_sha256":"35aac4ba525661bc70fb3ce3ffa435e9975d5a908a36ca395ac47569cc95cfbc"},"schema_version":"1.0"},"canonical_sha256":"c41f8fac93c067194d19aefe1d9821edafd327ca5a8c5e41339b0fb1539a5c5a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:15.403183Z","signature_b64":"oLP4JhBeRR+n+KXh78H68kB5/MnNf+G3CIm5qKYmJmOTWq8PAbvkO5WhmU7qKL3zNckJLTOGs97eUOqIoT0ICA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c41f8fac93c067194d19aefe1d9821edafd327ca5a8c5e41339b0fb1539a5c5a","last_reissued_at":"2026-05-18T01:15:15.402548Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:15.402548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1409.3850","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":"2026-05-18T01:15:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SgYIk0Y8oR+Rn0UftKBvHq6Aq7LXxSnGEgJadFCP02LV8ZNHDccsUD/plNIgZa8rb0qRjSHYsh1DZ7CG2g5WDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T11:46:05.589060Z"},"content_sha256":"87470484dadd5580335d14e70ac9f2ff69014defda9d745d20e005c74dea1bf1","schema_version":"1.0","event_id":"sha256:87470484dadd5580335d14e70ac9f2ff69014defda9d745d20e005c74dea1bf1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:YQPY7LETYBTRSTIZV37B3GBB5W","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Focusing Waves at Arbitrary Locations in a Ray-Chaotic Enclosure Using Time-Reversed Synthetic Sonas","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"nlin.CD","authors_text":"Bo Xiao, Edward Ott, Steven M. Anlage, Thomas M. Antonsen","submitted_at":"2014-09-12T20:04:50Z","abstract_excerpt":"Time reversal methods are widely used to achieve wave focusing in acoustics and electromagnetics. A typical time reversal experiment requires that a transmitter be initially present at the target focusing point, which limits the application of this technique. In this paper, we propose a method to focus waves at an arbitary location inside a complex enclosure using a numerically calculated wave excitation signal. We use a semi-classical ray algorithm to calculate the signal that would be received at a transceiver port resulting from the injection of a short pulse at the desired target location."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.3850","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":"2026-05-18T01:15:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nxs0EerEObFzVNzyB7qDcbwJE6VnP5UMvcJIGdHnb4zn0Pp53Imh+DE5tZzCxu05CiPwgwgIM60ggPUPMAkGBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T11:46:05.589757Z"},"content_sha256":"45f6caea6e19a74778a738b8c700581a9f0e31bee60fbca0047c83d8dfd25e2d","schema_version":"1.0","event_id":"sha256:45f6caea6e19a74778a738b8c700581a9f0e31bee60fbca0047c83d8dfd25e2d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YQPY7LETYBTRSTIZV37B3GBB5W/bundle.json","state_url":"https://pith.science/pith/YQPY7LETYBTRSTIZV37B3GBB5W/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YQPY7LETYBTRSTIZV37B3GBB5W/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":"2026-06-05T11:46:05Z","links":{"resolver":"https://pith.science/pith/YQPY7LETYBTRSTIZV37B3GBB5W","bundle":"https://pith.science/pith/YQPY7LETYBTRSTIZV37B3GBB5W/bundle.json","state":"https://pith.science/pith/YQPY7LETYBTRSTIZV37B3GBB5W/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YQPY7LETYBTRSTIZV37B3GBB5W/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:YQPY7LETYBTRSTIZV37B3GBB5W","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":"35aac4ba525661bc70fb3ce3ffa435e9975d5a908a36ca395ac47569cc95cfbc","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-09-12T20:04:50Z","title_canon_sha256":"eadb0385240af32a4431bab76be54c956eeeecbe5a37fdd3b606a947003797f5"},"schema_version":"1.0","source":{"id":"1409.3850","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.3850","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"arxiv_version","alias_value":"1409.3850v3","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.3850","created_at":"2026-05-18T01:15:15Z"},{"alias_kind":"pith_short_12","alias_value":"YQPY7LETYBTR","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_16","alias_value":"YQPY7LETYBTRSTIZ","created_at":"2026-05-18T12:28:57Z"},{"alias_kind":"pith_short_8","alias_value":"YQPY7LET","created_at":"2026-05-18T12:28:57Z"}],"graph_snapshots":[{"event_id":"sha256:45f6caea6e19a74778a738b8c700581a9f0e31bee60fbca0047c83d8dfd25e2d","target":"graph","created_at":"2026-05-18T01:15:15Z","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":"Time reversal methods are widely used to achieve wave focusing in acoustics and electromagnetics. A typical time reversal experiment requires that a transmitter be initially present at the target focusing point, which limits the application of this technique. In this paper, we propose a method to focus waves at an arbitary location inside a complex enclosure using a numerically calculated wave excitation signal. We use a semi-classical ray algorithm to calculate the signal that would be received at a transceiver port resulting from the injection of a short pulse at the desired target location.","authors_text":"Bo Xiao, Edward Ott, Steven M. Anlage, Thomas M. Antonsen","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-09-12T20:04:50Z","title":"Focusing Waves at Arbitrary Locations in a Ray-Chaotic Enclosure Using Time-Reversed Synthetic Sonas"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.3850","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":"sha256:87470484dadd5580335d14e70ac9f2ff69014defda9d745d20e005c74dea1bf1","target":"record","created_at":"2026-05-18T01:15:15Z","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":"35aac4ba525661bc70fb3ce3ffa435e9975d5a908a36ca395ac47569cc95cfbc","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.CD","submitted_at":"2014-09-12T20:04:50Z","title_canon_sha256":"eadb0385240af32a4431bab76be54c956eeeecbe5a37fdd3b606a947003797f5"},"schema_version":"1.0","source":{"id":"1409.3850","kind":"arxiv","version":3}},"canonical_sha256":"c41f8fac93c067194d19aefe1d9821edafd327ca5a8c5e41339b0fb1539a5c5a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c41f8fac93c067194d19aefe1d9821edafd327ca5a8c5e41339b0fb1539a5c5a","first_computed_at":"2026-05-18T01:15:15.402548Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:15.402548Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oLP4JhBeRR+n+KXh78H68kB5/MnNf+G3CIm5qKYmJmOTWq8PAbvkO5WhmU7qKL3zNckJLTOGs97eUOqIoT0ICA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:15.403183Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.3850","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87470484dadd5580335d14e70ac9f2ff69014defda9d745d20e005c74dea1bf1","sha256:45f6caea6e19a74778a738b8c700581a9f0e31bee60fbca0047c83d8dfd25e2d"],"state_sha256":"86d5878964293b1f8f7968ee0449c661cc4a2b070d08124b94438a30a6280ece"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Qpbu6ZBkzTk33JsgWc0AxrJovPS1+vFN25Kb+TpjoIz8thC4OXAL72ipxScmxassr3AAApwCjU5F8sVe3lhGBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T11:46:05.592857Z","bundle_sha256":"fef5540e5ac1c33a614e4883685436b038c55d3ec2e10fa60197abbf125606c4"}}