{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:UG6LR3MJLGGLTZCELIHRDVEKBM","short_pith_number":"pith:UG6LR3MJ","canonical_record":{"source":{"id":"2309.14274","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2023-09-25T16:38:06Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"f7e76838fb6bb43aaa3842aab6d600a4e931ce3b7b80d9fbcadaebbbf22b65eb","abstract_canon_sha256":"d2fcff5ad83a55284295bf87078150df60090bff76f1be1b183c7f7b87ac836f"},"schema_version":"1.0"},"canonical_sha256":"a1bcb8ed89598cb9e4445a0f11d48a0b075fe3ee1da61503afdad7fe130d7128","source":{"kind":"arxiv","id":"2309.14274","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.14274","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"arxiv_version","alias_value":"2309.14274v2","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.14274","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"pith_short_12","alias_value":"UG6LR3MJLGGL","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"UG6LR3MJLGGLTZCE","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"UG6LR3MJ","created_at":"2026-07-05T09:28:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:UG6LR3MJLGGLTZCELIHRDVEKBM","target":"record","payload":{"canonical_record":{"source":{"id":"2309.14274","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2023-09-25T16:38:06Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"f7e76838fb6bb43aaa3842aab6d600a4e931ce3b7b80d9fbcadaebbbf22b65eb","abstract_canon_sha256":"d2fcff5ad83a55284295bf87078150df60090bff76f1be1b183c7f7b87ac836f"},"schema_version":"1.0"},"canonical_sha256":"a1bcb8ed89598cb9e4445a0f11d48a0b075fe3ee1da61503afdad7fe130d7128","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:28:09.439504Z","signature_b64":"HeDM8L7xYsQQwYVQasYqKA2mkedsqXHwZH6mjBX5T3IlcL7U5JrXPp4YnIjy9ipE8WCSQaehiMLTh0XMPCKDDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1bcb8ed89598cb9e4445a0f11d48a0b075fe3ee1da61503afdad7fe130d7128","last_reissued_at":"2026-07-05T09:28:09.439080Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:28:09.439080Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2309.14274","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:28:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XxRg0iYUb2qlR8A9dT5OsyJCpBP6RyXl0krr/VshWr23nnVJMV/t24rZ5ZnveE4++CCd5ExAkPSczaog1l5KDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T22:36:00.375764Z"},"content_sha256":"aec828b6b9904788c6e24fc0e5795c79e431d3d78837ec6a3d0f726a7857dfe7","schema_version":"1.0","event_id":"sha256:aec828b6b9904788c6e24fc0e5795c79e431d3d78837ec6a3d0f726a7857dfe7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:UG6LR3MJLGGLTZCELIHRDVEKBM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Analysis and Experimental Validation of the WPT Efficiency of the Both-Sides Retrodirective System","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Bo Yang, Charleston Dale M. Ambatali, Naoki Shinohara, Shinichi Nakasuka","submitted_at":"2023-09-25T16:38:06Z","abstract_excerpt":"The retrodirective antenna array is considered as a mechanism to enable target tracking of a power receiver for long range wireless power transfer (WPT) due to its simplicity in implementation using only analog circuits. By installing the retrodirective capability on both the generator and rectenna arrays, a feedback loop that produces a high efficiency WPT channel is created. In this paper, we characterize the dynamics of this phenomenon using a discrete-time state-space model based on S-parameters and show that the system can naturally achieve maximum theoretical WPT efficiency. We further c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.14274","kind":"arxiv","version":2},"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/2309.14274/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":"2026-07-05T09:28:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OnDb/3h3peFrWTnJ84UAE3fcM9D8ah5vipxKmNuRojXiI7uN0uTUh0Wx5n+AY8IljoNTjUZP50zIOHmtm1WBAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T22:36:00.376801Z"},"content_sha256":"b107d8664ee834f6e76fb5c4eaabfa2d159bcca33f6c5fb5b718bbc80c077639","schema_version":"1.0","event_id":"sha256:b107d8664ee834f6e76fb5c4eaabfa2d159bcca33f6c5fb5b718bbc80c077639"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UG6LR3MJLGGLTZCELIHRDVEKBM/bundle.json","state_url":"https://pith.science/pith/UG6LR3MJLGGLTZCELIHRDVEKBM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UG6LR3MJLGGLTZCELIHRDVEKBM/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":"2026-08-18T22:36:00Z","links":{"resolver":"https://pith.science/pith/UG6LR3MJLGGLTZCELIHRDVEKBM","bundle":"https://pith.science/pith/UG6LR3MJLGGLTZCELIHRDVEKBM/bundle.json","state":"https://pith.science/pith/UG6LR3MJLGGLTZCELIHRDVEKBM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UG6LR3MJLGGLTZCELIHRDVEKBM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:UG6LR3MJLGGLTZCELIHRDVEKBM","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":"d2fcff5ad83a55284295bf87078150df60090bff76f1be1b183c7f7b87ac836f","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2023-09-25T16:38:06Z","title_canon_sha256":"f7e76838fb6bb43aaa3842aab6d600a4e931ce3b7b80d9fbcadaebbbf22b65eb"},"schema_version":"1.0","source":{"id":"2309.14274","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2309.14274","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"arxiv_version","alias_value":"2309.14274v2","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2309.14274","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"pith_short_12","alias_value":"UG6LR3MJLGGL","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"UG6LR3MJLGGLTZCE","created_at":"2026-07-05T09:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"UG6LR3MJ","created_at":"2026-07-05T09:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:b107d8664ee834f6e76fb5c4eaabfa2d159bcca33f6c5fb5b718bbc80c077639","target":"graph","created_at":"2026-07-05T09:28:09Z","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/2309.14274/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The retrodirective antenna array is considered as a mechanism to enable target tracking of a power receiver for long range wireless power transfer (WPT) due to its simplicity in implementation using only analog circuits. By installing the retrodirective capability on both the generator and rectenna arrays, a feedback loop that produces a high efficiency WPT channel is created. In this paper, we characterize the dynamics of this phenomenon using a discrete-time state-space model based on S-parameters and show that the system can naturally achieve maximum theoretical WPT efficiency. We further c","authors_text":"Bo Yang, Charleston Dale M. Ambatali, Naoki Shinohara, Shinichi Nakasuka","cross_cats":["cs.SY"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2023-09-25T16:38:06Z","title":"Analysis and Experimental Validation of the WPT Efficiency of the Both-Sides Retrodirective System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.14274","kind":"arxiv","version":2},"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:aec828b6b9904788c6e24fc0e5795c79e431d3d78837ec6a3d0f726a7857dfe7","target":"record","created_at":"2026-07-05T09:28:09Z","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":"d2fcff5ad83a55284295bf87078150df60090bff76f1be1b183c7f7b87ac836f","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SY","submitted_at":"2023-09-25T16:38:06Z","title_canon_sha256":"f7e76838fb6bb43aaa3842aab6d600a4e931ce3b7b80d9fbcadaebbbf22b65eb"},"schema_version":"1.0","source":{"id":"2309.14274","kind":"arxiv","version":2}},"canonical_sha256":"a1bcb8ed89598cb9e4445a0f11d48a0b075fe3ee1da61503afdad7fe130d7128","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1bcb8ed89598cb9e4445a0f11d48a0b075fe3ee1da61503afdad7fe130d7128","first_computed_at":"2026-07-05T09:28:09.439080Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:28:09.439080Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HeDM8L7xYsQQwYVQasYqKA2mkedsqXHwZH6mjBX5T3IlcL7U5JrXPp4YnIjy9ipE8WCSQaehiMLTh0XMPCKDDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T09:28:09.439504Z","signed_message":"canonical_sha256_bytes"},"source_id":"2309.14274","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aec828b6b9904788c6e24fc0e5795c79e431d3d78837ec6a3d0f726a7857dfe7","sha256:b107d8664ee834f6e76fb5c4eaabfa2d159bcca33f6c5fb5b718bbc80c077639"],"state_sha256":"04c8029da543ec855555b4978e61d65c400765e86bef4209449c1a1f8dffd716"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8errAdbMe+rrczPqCEXFFYkw6jltx9mMvv/h+M6NM9ITJTwiASktBHK7zuqd05+9eSxSHLtDPlEmbTn9CHVnBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T22:36:00.382761Z","bundle_sha256":"aaaed634b61fa1491b398faf57a19d5d7ae7cdc3827757c007896976b4f18b84"}}