{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:5ZXS4MVE4FQLSMO742M327RK7I","short_pith_number":"pith:5ZXS4MVE","canonical_record":{"source":{"id":"2405.09222","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-15T10:03:22Z","cross_cats_sorted":[],"title_canon_sha256":"12c924151cd11fcfb8563365c4b84b0eefbc1fefbd326e780db65c94b16be346","abstract_canon_sha256":"2ed154a3be85db826ddae27dd6dccc3aad4e9d105f2b78db11ee469872752b47"},"schema_version":"1.0"},"canonical_sha256":"ee6f2e32a4e160b931dfe699bd7e2afa34d14db623508e3a2acf7c41ad9305c5","source":{"kind":"arxiv","id":"2405.09222","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.09222","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"arxiv_version","alias_value":"2405.09222v1","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.09222","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"pith_short_12","alias_value":"5ZXS4MVE4FQL","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"pith_short_16","alias_value":"5ZXS4MVE4FQLSMO7","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"pith_short_8","alias_value":"5ZXS4MVE","created_at":"2026-07-05T08:19:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:5ZXS4MVE4FQLSMO742M327RK7I","target":"record","payload":{"canonical_record":{"source":{"id":"2405.09222","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-15T10:03:22Z","cross_cats_sorted":[],"title_canon_sha256":"12c924151cd11fcfb8563365c4b84b0eefbc1fefbd326e780db65c94b16be346","abstract_canon_sha256":"2ed154a3be85db826ddae27dd6dccc3aad4e9d105f2b78db11ee469872752b47"},"schema_version":"1.0"},"canonical_sha256":"ee6f2e32a4e160b931dfe699bd7e2afa34d14db623508e3a2acf7c41ad9305c5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:19:27.642727Z","signature_b64":"+cAc7OOGdhSJg42QwkgB0DatbuXRVS0yfhKLE2KpIMervGyvq8VqfIQiAOGRaK7ULIPIuQPXNY9WjLNSLO9hBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ee6f2e32a4e160b931dfe699bd7e2afa34d14db623508e3a2acf7c41ad9305c5","last_reissued_at":"2026-07-05T08:19:27.642306Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:19:27.642306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2405.09222","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":"2026-07-05T08:19:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"In7s4SB8xDBsupZj1bamh/wEw0ezgxWHjgoo00iJgBeRSaFqJQnwFZZXy3jeAn/aEqUCz7KhKC6FQ4SnxcKqCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T09:15:37.306311Z"},"content_sha256":"3ed173632e8533458421a28091f0a9ab0aec512d3a4cda4ffc3d8843fd281c54","schema_version":"1.0","event_id":"sha256:3ed173632e8533458421a28091f0a9ab0aec512d3a4cda4ffc3d8843fd281c54"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:5ZXS4MVE4FQLSMO742M327RK7I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Anchor Layout Optimization for Ultrasonic Indoor Positioning Using Swarm Intelligence","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.SP","authors_text":"Daan Delabie, Liesbet Van der Perre, Lieven De Strycker, Thomas Wilding","submitted_at":"2024-05-15T10:03:22Z","abstract_excerpt":"Indoor positioning applications are craving for ever higher precision and accuracy across the entire coverage zone. Optimal anchor placement and the deployment of multiple distributed anchor nodes could have a major impact in this regard. This paper examines the influences of these two difficult to approach hypotheses by means of a straightforward ultrasonic 3D indoor positioning system deployed in a real-life scenario via a geometric based simulation framework. To obtain an optimal anchor placement, a particle swarm optimization (PSO) algorithm is introduced and consequently performed for set"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.09222","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/2405.09222/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":"2026-07-05T08:19:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a2YhGxEyhOLSyZ/lhmMklqs3ZJWEEbCjaW2ks8/4ADcCkY0vvjGtCw4yeCHBlJVfwcfGMN8fIbXTOgo28Ir2DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T09:15:37.307359Z"},"content_sha256":"ef3fb8f48005ad662d96386c388d0e1f5261758e577b4ce1db5e3a8c12296c1d","schema_version":"1.0","event_id":"sha256:ef3fb8f48005ad662d96386c388d0e1f5261758e577b4ce1db5e3a8c12296c1d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5ZXS4MVE4FQLSMO742M327RK7I/bundle.json","state_url":"https://pith.science/pith/5ZXS4MVE4FQLSMO742M327RK7I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5ZXS4MVE4FQLSMO742M327RK7I/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":"2026-08-05T09:15:37Z","links":{"resolver":"https://pith.science/pith/5ZXS4MVE4FQLSMO742M327RK7I","bundle":"https://pith.science/pith/5ZXS4MVE4FQLSMO742M327RK7I/bundle.json","state":"https://pith.science/pith/5ZXS4MVE4FQLSMO742M327RK7I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5ZXS4MVE4FQLSMO742M327RK7I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:5ZXS4MVE4FQLSMO742M327RK7I","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":"2ed154a3be85db826ddae27dd6dccc3aad4e9d105f2b78db11ee469872752b47","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-15T10:03:22Z","title_canon_sha256":"12c924151cd11fcfb8563365c4b84b0eefbc1fefbd326e780db65c94b16be346"},"schema_version":"1.0","source":{"id":"2405.09222","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2405.09222","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"arxiv_version","alias_value":"2405.09222v1","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2405.09222","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"pith_short_12","alias_value":"5ZXS4MVE4FQL","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"pith_short_16","alias_value":"5ZXS4MVE4FQLSMO7","created_at":"2026-07-05T08:19:27Z"},{"alias_kind":"pith_short_8","alias_value":"5ZXS4MVE","created_at":"2026-07-05T08:19:27Z"}],"graph_snapshots":[{"event_id":"sha256:ef3fb8f48005ad662d96386c388d0e1f5261758e577b4ce1db5e3a8c12296c1d","target":"graph","created_at":"2026-07-05T08:19:27Z","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/2405.09222/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Indoor positioning applications are craving for ever higher precision and accuracy across the entire coverage zone. Optimal anchor placement and the deployment of multiple distributed anchor nodes could have a major impact in this regard. This paper examines the influences of these two difficult to approach hypotheses by means of a straightforward ultrasonic 3D indoor positioning system deployed in a real-life scenario via a geometric based simulation framework. To obtain an optimal anchor placement, a particle swarm optimization (PSO) algorithm is introduced and consequently performed for set","authors_text":"Daan Delabie, Liesbet Van der Perre, Lieven De Strycker, Thomas Wilding","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-15T10:03:22Z","title":"Anchor Layout Optimization for Ultrasonic Indoor Positioning Using Swarm Intelligence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.09222","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":"sha256:3ed173632e8533458421a28091f0a9ab0aec512d3a4cda4ffc3d8843fd281c54","target":"record","created_at":"2026-07-05T08:19:27Z","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":"2ed154a3be85db826ddae27dd6dccc3aad4e9d105f2b78db11ee469872752b47","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.SP","submitted_at":"2024-05-15T10:03:22Z","title_canon_sha256":"12c924151cd11fcfb8563365c4b84b0eefbc1fefbd326e780db65c94b16be346"},"schema_version":"1.0","source":{"id":"2405.09222","kind":"arxiv","version":1}},"canonical_sha256":"ee6f2e32a4e160b931dfe699bd7e2afa34d14db623508e3a2acf7c41ad9305c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee6f2e32a4e160b931dfe699bd7e2afa34d14db623508e3a2acf7c41ad9305c5","first_computed_at":"2026-07-05T08:19:27.642306Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:19:27.642306Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+cAc7OOGdhSJg42QwkgB0DatbuXRVS0yfhKLE2KpIMervGyvq8VqfIQiAOGRaK7ULIPIuQPXNY9WjLNSLO9hBA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:19:27.642727Z","signed_message":"canonical_sha256_bytes"},"source_id":"2405.09222","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3ed173632e8533458421a28091f0a9ab0aec512d3a4cda4ffc3d8843fd281c54","sha256:ef3fb8f48005ad662d96386c388d0e1f5261758e577b4ce1db5e3a8c12296c1d"],"state_sha256":"e111cbb54dd19582a7a906258c4b6edd4075da2c2c0292cacedde238df5e1824"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dIFvUJjoOdW1vhncf4hIbGPvM28GXcoUZQTClsR1b6RW2HgFCKKyXOyrOgTpCcS6qsXSUsd6ufvJVdYYe1etCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T09:15:37.314441Z","bundle_sha256":"9186da84a82ef8e5e7b34763c8e446daf0b33b440e481f3c509d1b0672defda0"}}