{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:NSSQCHFZEB4SX6CNZOJOGIJW33","short_pith_number":"pith:NSSQCHFZ","canonical_record":{"source":{"id":"2103.11789","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IT","submitted_at":"2021-03-08T11:26:50Z","cross_cats_sorted":["cs.SY","eess.SP","eess.SY","math.IT"],"title_canon_sha256":"95f5567aa47e5e60e523a6dec99843ce4faa2f8ca5058e5996adae43f27450c4","abstract_canon_sha256":"139d1ab6bdc9c31b4c18b8712acf0ed85621875fbe488079651d53cef8d14fe4"},"schema_version":"1.0"},"canonical_sha256":"6ca5011cb920792bf84dcb92e32136defe9510da3e14c0ae1010ae951d0ba653","source":{"kind":"arxiv","id":"2103.11789","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.11789","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"2103.11789v1","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.11789","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"NSSQCHFZEB4S","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"pith_short_16","alias_value":"NSSQCHFZEB4SX6CN","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"pith_short_8","alias_value":"NSSQCHFZ","created_at":"2026-07-05T02:25:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:NSSQCHFZEB4SX6CNZOJOGIJW33","target":"record","payload":{"canonical_record":{"source":{"id":"2103.11789","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IT","submitted_at":"2021-03-08T11:26:50Z","cross_cats_sorted":["cs.SY","eess.SP","eess.SY","math.IT"],"title_canon_sha256":"95f5567aa47e5e60e523a6dec99843ce4faa2f8ca5058e5996adae43f27450c4","abstract_canon_sha256":"139d1ab6bdc9c31b4c18b8712acf0ed85621875fbe488079651d53cef8d14fe4"},"schema_version":"1.0"},"canonical_sha256":"6ca5011cb920792bf84dcb92e32136defe9510da3e14c0ae1010ae951d0ba653","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:25:12.264996Z","signature_b64":"+AM7vBFxAZ4d6wb9hM324CSgEh+peLBXuqHR/IR5eZYX3oLLOe0+WBZB0Htdkt2rP2eNIuJUHqYMtLsVNEX8Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6ca5011cb920792bf84dcb92e32136defe9510da3e14c0ae1010ae951d0ba653","last_reissued_at":"2026-07-05T02:25:12.264472Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:25:12.264472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2103.11789","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":"2026-07-05T02:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/WzEMaBjJPTRR+0PlukSnRFktrHdtaP5xvKcA+FwknvQBcGEwjeoXv7EBWsEoQYThwNwTU8zaR1M18jS7IeMBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T11:44:58.420121Z"},"content_sha256":"f9993b6aa9fa5ec76768127ddadcbe93daad78fd0a45a38bc10f7628153fa1c4","schema_version":"1.0","event_id":"sha256:f9993b6aa9fa5ec76768127ddadcbe93daad78fd0a45a38bc10f7628153fa1c4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:NSSQCHFZEB4SX6CNZOJOGIJW33","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Time-Domain Hybrid PAM for Data-Rate and Distance Adaptive UWOC System","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SY","eess.SP","eess.SY","math.IT"],"primary_cat":"cs.IT","authors_text":"F. Kobori, M. Aizat, M. Jinno, T. Kimura, T. Kodama, Y. Inoue","submitted_at":"2021-03-08T11:26:50Z","abstract_excerpt":"The challenge for next-generation underwater optical wireless communication systems is to develop optical transceivers that can operate with low power consumption by maximizing the transmission capacity according to the transmission distance between transmitters and receivers. This study proposes an underwater wireless optical communication (UWOC) system using an optical transceiver with an optimum transmission rate for the deep sea with near-pure water properties. As a method for actualizing an optical transceiver with an optimum transmission rate in a UWOC system, time-domain hybrid pulse am"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.11789","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/2103.11789/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":"2026-07-05T02:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SajPPFTNllu7XB3ODNbioLnVKN7EprXz7zM8qh7HtIGDA0/WGZ8+IqTodgVamrfsHk8mnBBSV0dUYE+ItU1TCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T11:44:58.420638Z"},"content_sha256":"ca5fb25ac63755bf0de2b3a97bc7ed64e8d535595533997adbb84db4b3974e07","schema_version":"1.0","event_id":"sha256:ca5fb25ac63755bf0de2b3a97bc7ed64e8d535595533997adbb84db4b3974e07"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NSSQCHFZEB4SX6CNZOJOGIJW33/bundle.json","state_url":"https://pith.science/pith/NSSQCHFZEB4SX6CNZOJOGIJW33/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NSSQCHFZEB4SX6CNZOJOGIJW33/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":"2026-08-23T11:44:58Z","links":{"resolver":"https://pith.science/pith/NSSQCHFZEB4SX6CNZOJOGIJW33","bundle":"https://pith.science/pith/NSSQCHFZEB4SX6CNZOJOGIJW33/bundle.json","state":"https://pith.science/pith/NSSQCHFZEB4SX6CNZOJOGIJW33/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NSSQCHFZEB4SX6CNZOJOGIJW33/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:NSSQCHFZEB4SX6CNZOJOGIJW33","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":"139d1ab6bdc9c31b4c18b8712acf0ed85621875fbe488079651d53cef8d14fe4","cross_cats_sorted":["cs.SY","eess.SP","eess.SY","math.IT"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IT","submitted_at":"2021-03-08T11:26:50Z","title_canon_sha256":"95f5567aa47e5e60e523a6dec99843ce4faa2f8ca5058e5996adae43f27450c4"},"schema_version":"1.0","source":{"id":"2103.11789","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.11789","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"2103.11789v1","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.11789","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"NSSQCHFZEB4S","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"pith_short_16","alias_value":"NSSQCHFZEB4SX6CN","created_at":"2026-07-05T02:25:12Z"},{"alias_kind":"pith_short_8","alias_value":"NSSQCHFZ","created_at":"2026-07-05T02:25:12Z"}],"graph_snapshots":[{"event_id":"sha256:ca5fb25ac63755bf0de2b3a97bc7ed64e8d535595533997adbb84db4b3974e07","target":"graph","created_at":"2026-07-05T02:25:12Z","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/2103.11789/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The challenge for next-generation underwater optical wireless communication systems is to develop optical transceivers that can operate with low power consumption by maximizing the transmission capacity according to the transmission distance between transmitters and receivers. This study proposes an underwater wireless optical communication (UWOC) system using an optical transceiver with an optimum transmission rate for the deep sea with near-pure water properties. As a method for actualizing an optical transceiver with an optimum transmission rate in a UWOC system, time-domain hybrid pulse am","authors_text":"F. Kobori, M. Aizat, M. Jinno, T. Kimura, T. Kodama, Y. Inoue","cross_cats":["cs.SY","eess.SP","eess.SY","math.IT"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IT","submitted_at":"2021-03-08T11:26:50Z","title":"Time-Domain Hybrid PAM for Data-Rate and Distance Adaptive UWOC System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.11789","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:f9993b6aa9fa5ec76768127ddadcbe93daad78fd0a45a38bc10f7628153fa1c4","target":"record","created_at":"2026-07-05T02:25:12Z","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":"139d1ab6bdc9c31b4c18b8712acf0ed85621875fbe488079651d53cef8d14fe4","cross_cats_sorted":["cs.SY","eess.SP","eess.SY","math.IT"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.IT","submitted_at":"2021-03-08T11:26:50Z","title_canon_sha256":"95f5567aa47e5e60e523a6dec99843ce4faa2f8ca5058e5996adae43f27450c4"},"schema_version":"1.0","source":{"id":"2103.11789","kind":"arxiv","version":1}},"canonical_sha256":"6ca5011cb920792bf84dcb92e32136defe9510da3e14c0ae1010ae951d0ba653","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6ca5011cb920792bf84dcb92e32136defe9510da3e14c0ae1010ae951d0ba653","first_computed_at":"2026-07-05T02:25:12.264472Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:25:12.264472Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+AM7vBFxAZ4d6wb9hM324CSgEh+peLBXuqHR/IR5eZYX3oLLOe0+WBZB0Htdkt2rP2eNIuJUHqYMtLsVNEX8Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T02:25:12.264996Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.11789","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9993b6aa9fa5ec76768127ddadcbe93daad78fd0a45a38bc10f7628153fa1c4","sha256:ca5fb25ac63755bf0de2b3a97bc7ed64e8d535595533997adbb84db4b3974e07"],"state_sha256":"aa5e39206dcbf5b39ca1b4f1b733102fcd09462787861bf6b5d8a4198317ca05"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TPOrLsHjBDO7Vv0Fpy2M+PawhgVAdz/vLMx+dRsCDbBKFBnqxcYevuWIs7WCLSH+KSriR+rU7jfSpiXIqKSKDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T11:44:58.424350Z","bundle_sha256":"fe6cea10b5d23a6b784035273876a0139fd3f336a9d6c226b6a24b263305591c"}}