{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:X4WSKAWQQ5UVVWQFFHUL2TFC4T","short_pith_number":"pith:X4WSKAWQ","canonical_record":{"source":{"id":"1906.10554","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-24T08:01:50Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"653ac560cff8be1e976403ec3866d2aaddb43fffc1e86adcf88333ed5d807c7c","abstract_canon_sha256":"dcf7aa6a5de4591eb885d668aa84fcedf5f3bd5d20102b1a7b0425cb6a233866"},"schema_version":"1.0"},"canonical_sha256":"bf2d2502d087695ada0529e8bd4ca2e4d0372621c6e533c6b07819e585e68f7d","source":{"kind":"arxiv","id":"1906.10554","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.10554","created_at":"2026-05-17T23:42:16Z"},{"alias_kind":"arxiv_version","alias_value":"1906.10554v1","created_at":"2026-05-17T23:42:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.10554","created_at":"2026-05-17T23:42:16Z"},{"alias_kind":"pith_short_12","alias_value":"X4WSKAWQQ5UV","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"X4WSKAWQQ5UVVWQF","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"X4WSKAWQ","created_at":"2026-05-18T12:33:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:X4WSKAWQQ5UVVWQFFHUL2TFC4T","target":"record","payload":{"canonical_record":{"source":{"id":"1906.10554","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-24T08:01:50Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"653ac560cff8be1e976403ec3866d2aaddb43fffc1e86adcf88333ed5d807c7c","abstract_canon_sha256":"dcf7aa6a5de4591eb885d668aa84fcedf5f3bd5d20102b1a7b0425cb6a233866"},"schema_version":"1.0"},"canonical_sha256":"bf2d2502d087695ada0529e8bd4ca2e4d0372621c6e533c6b07819e585e68f7d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:16.015102Z","signature_b64":"PotLeGMX1Ky18/M9rvX8PivQD8pB9loO1SJBGOlYx/7gEenZ0GsAQxs6Vx9JCk5plthokNzIND9f49Qfrn3hBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf2d2502d087695ada0529e8bd4ca2e4d0372621c6e533c6b07819e585e68f7d","last_reissued_at":"2026-05-17T23:42:16.014687Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:16.014687Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.10554","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":"2026-05-17T23:42:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eBC311FHAnV01QKXKqm719OmxysIeK305xxiPVvA3Jxd71Pqh1VVNsQtHRtI8Vxho62H3+kSs1v6dbP35FpsDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T10:27:42.649277Z"},"content_sha256":"7e5437385edc7f8936bc5883620cc283cb74c0b2ee70f97b196f7994b231b263","schema_version":"1.0","event_id":"sha256:7e5437385edc7f8936bc5883620cc283cb74c0b2ee70f97b196f7994b231b263"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:X4WSKAWQQ5UVVWQFFHUL2TFC4T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Design of a 1x4 CPW Microstrip Antenna Array on PET Substrate for Biomedical Applications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"physics.med-ph","authors_text":"A. Iftikhar, M. F. Shafique, M. S. Khan, Raed M. Shubair, U. Farooq","submitted_at":"2019-06-24T08:01:50Z","abstract_excerpt":"In this paper, a single layer Coplanar Waveguide-fed microstrip patch antenna array is presented for biomedical applications. The proposed antenna array is realized on a transparent and flexible Polyethylene Terephthalate substrate, has 1x4 radiating elements and measures only 280 x 192 mm2. The antenna array resonates at 2.68 GHz and has a peak-simulated gain of 10 dBi. A prototype is also fabricated, and the conductive patterns are drawn using cost-efficient adhesive copper foils instead of conventional copper or silver nanoparticle ink. The corresponding measured results agree well with the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.10554","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":""},"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":"2026-05-17T23:42:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fS80SxzpvMDh3vNJvgv2tzUEHCVAF1OjD03Dd9d/+aQVhhpXP4LLCST+hDaV7oG8HurPQLrwnRCtg+Kg1Jw2Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T10:27:42.649632Z"},"content_sha256":"5876e3b1c55ed304b8f38fd71c1cf01ad21a1dce608f1b37bc07cf593bca98ee","schema_version":"1.0","event_id":"sha256:5876e3b1c55ed304b8f38fd71c1cf01ad21a1dce608f1b37bc07cf593bca98ee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X4WSKAWQQ5UVVWQFFHUL2TFC4T/bundle.json","state_url":"https://pith.science/pith/X4WSKAWQQ5UVVWQFFHUL2TFC4T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X4WSKAWQQ5UVVWQFFHUL2TFC4T/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":"2026-06-29T10:27:42Z","links":{"resolver":"https://pith.science/pith/X4WSKAWQQ5UVVWQFFHUL2TFC4T","bundle":"https://pith.science/pith/X4WSKAWQQ5UVVWQFFHUL2TFC4T/bundle.json","state":"https://pith.science/pith/X4WSKAWQQ5UVVWQFFHUL2TFC4T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X4WSKAWQQ5UVVWQFFHUL2TFC4T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:X4WSKAWQQ5UVVWQFFHUL2TFC4T","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":"dcf7aa6a5de4591eb885d668aa84fcedf5f3bd5d20102b1a7b0425cb6a233866","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-24T08:01:50Z","title_canon_sha256":"653ac560cff8be1e976403ec3866d2aaddb43fffc1e86adcf88333ed5d807c7c"},"schema_version":"1.0","source":{"id":"1906.10554","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.10554","created_at":"2026-05-17T23:42:16Z"},{"alias_kind":"arxiv_version","alias_value":"1906.10554v1","created_at":"2026-05-17T23:42:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.10554","created_at":"2026-05-17T23:42:16Z"},{"alias_kind":"pith_short_12","alias_value":"X4WSKAWQQ5UV","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"X4WSKAWQQ5UVVWQF","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"X4WSKAWQ","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:5876e3b1c55ed304b8f38fd71c1cf01ad21a1dce608f1b37bc07cf593bca98ee","target":"graph","created_at":"2026-05-17T23:42:16Z","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":"In this paper, a single layer Coplanar Waveguide-fed microstrip patch antenna array is presented for biomedical applications. The proposed antenna array is realized on a transparent and flexible Polyethylene Terephthalate substrate, has 1x4 radiating elements and measures only 280 x 192 mm2. The antenna array resonates at 2.68 GHz and has a peak-simulated gain of 10 dBi. A prototype is also fabricated, and the conductive patterns are drawn using cost-efficient adhesive copper foils instead of conventional copper or silver nanoparticle ink. The corresponding measured results agree well with the","authors_text":"A. Iftikhar, M. F. Shafique, M. S. Khan, Raed M. Shubair, U. Farooq","cross_cats":["eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-24T08:01:50Z","title":"Design of a 1x4 CPW Microstrip Antenna Array on PET Substrate for Biomedical Applications"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.10554","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":"sha256:7e5437385edc7f8936bc5883620cc283cb74c0b2ee70f97b196f7994b231b263","target":"record","created_at":"2026-05-17T23:42:16Z","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":"dcf7aa6a5de4591eb885d668aa84fcedf5f3bd5d20102b1a7b0425cb6a233866","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2019-06-24T08:01:50Z","title_canon_sha256":"653ac560cff8be1e976403ec3866d2aaddb43fffc1e86adcf88333ed5d807c7c"},"schema_version":"1.0","source":{"id":"1906.10554","kind":"arxiv","version":1}},"canonical_sha256":"bf2d2502d087695ada0529e8bd4ca2e4d0372621c6e533c6b07819e585e68f7d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bf2d2502d087695ada0529e8bd4ca2e4d0372621c6e533c6b07819e585e68f7d","first_computed_at":"2026-05-17T23:42:16.014687Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:16.014687Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PotLeGMX1Ky18/M9rvX8PivQD8pB9loO1SJBGOlYx/7gEenZ0GsAQxs6Vx9JCk5plthokNzIND9f49Qfrn3hBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:16.015102Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.10554","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e5437385edc7f8936bc5883620cc283cb74c0b2ee70f97b196f7994b231b263","sha256:5876e3b1c55ed304b8f38fd71c1cf01ad21a1dce608f1b37bc07cf593bca98ee"],"state_sha256":"52a0c3a32f101801c8f999772038ddc4256f129a10ffbb47deda9b6b3c81abd3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YYNxc0UyoBJFCcua1wrj9tZ5G3K7idhM3SCmY4uZ2FIu/3bYjb65ulFryjyIfyOR++4HDqORGSMWuNA7LXgGAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T10:27:42.651429Z","bundle_sha256":"4c96c47e2ad2fb19b626ad1c0d2fb9700197513fa79494e1af9231c726c4b173"}}