{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SJKJQQ5SPYPK2PAM3AKULUFXV3","short_pith_number":"pith:SJKJQQ5S","canonical_record":{"source":{"id":"1712.00376","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-01T15:48:35Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"ad21d83bcc16bd645f92b91714877b2b9e349ca98655b7f661f84e8be2d2f710","abstract_canon_sha256":"93bbb7a85354c5e8b3f95fed3ebf8ab4883ca491ae62cd4036a25e0da9a3f5ce"},"schema_version":"1.0"},"canonical_sha256":"92549843b27e1ead3c0cd81545d0b7aef41aa8a293da5fcf7eecfaa3a5a5c517","source":{"kind":"arxiv","id":"1712.00376","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.00376","created_at":"2026-05-18T00:29:06Z"},{"alias_kind":"arxiv_version","alias_value":"1712.00376v1","created_at":"2026-05-18T00:29:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.00376","created_at":"2026-05-18T00:29:06Z"},{"alias_kind":"pith_short_12","alias_value":"SJKJQQ5SPYPK","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SJKJQQ5SPYPK2PAM","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SJKJQQ5S","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SJKJQQ5SPYPK2PAM3AKULUFXV3","target":"record","payload":{"canonical_record":{"source":{"id":"1712.00376","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-01T15:48:35Z","cross_cats_sorted":["eess.SP","math.IT"],"title_canon_sha256":"ad21d83bcc16bd645f92b91714877b2b9e349ca98655b7f661f84e8be2d2f710","abstract_canon_sha256":"93bbb7a85354c5e8b3f95fed3ebf8ab4883ca491ae62cd4036a25e0da9a3f5ce"},"schema_version":"1.0"},"canonical_sha256":"92549843b27e1ead3c0cd81545d0b7aef41aa8a293da5fcf7eecfaa3a5a5c517","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:29:06.393823Z","signature_b64":"la9XaKWp9cU4gzPT/juVGam9AlTq7lzXhmwQqu1+vEO/J+n7KZAX7CZsZHAKkWGzXJd/hxtX/KSWuTPyX5NiCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"92549843b27e1ead3c0cd81545d0b7aef41aa8a293da5fcf7eecfaa3a5a5c517","last_reissued_at":"2026-05-18T00:29:06.393036Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:29:06.393036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1712.00376","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":"2026-05-18T00:29:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zj3+SAn7ni8mJo8tLNT09zUeJCxhqlyedRdz4koZgMc+rjLwZJH3QV4v9LYoxruWy+9h6vEddc1KE0F+u8lxCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:46:20.412592Z"},"content_sha256":"4766c427989226c51fe0bb46ca1c7a5e7b1738fdf7cf76c549dc8e3dca86a7ee","schema_version":"1.0","event_id":"sha256:4766c427989226c51fe0bb46ca1c7a5e7b1738fdf7cf76c549dc8e3dca86a7ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SJKJQQ5SPYPK2PAM3AKULUFXV3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polar Coding for the Large Hadron Collider: Challenges in Code Concatenation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP","math.IT"],"primary_cat":"cs.IT","authors_text":"Alexios Balatsoukas-Stimming, Jan Uythoven, Tomasz Podzorny","submitted_at":"2017-12-01T15:48:35Z","abstract_excerpt":"In this work, we present a concatenated repetition-polar coding scheme that is aimed at applications requiring highly unbalanced unequal bit-error protection, such as the Beam Interlock System of the Large Hadron Collider at CERN. Even though this concatenation scheme is simple, it reveals significant challenges that may be encountered when designing a concatenated scheme that uses a polar code as an inner code, such as error correlation and unusual decision log-likelihood ratio distributions. We explain and analyze these challenges and we propose two ways to overcome them."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.00376","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":"2026-05-18T00:29:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9LrMizGGe6dbwMaRCICPYGk1tdlFOaDwBwnJv5tlUUQ45qgRFRtDbj0vzH+lwrrB9aHFjonW9oyyWjwHaGnMBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T23:46:20.413275Z"},"content_sha256":"056f79bce8816fadb8fdd14eacc2b16976bbeec54085cde7d11e1cf8efb7e207","schema_version":"1.0","event_id":"sha256:056f79bce8816fadb8fdd14eacc2b16976bbeec54085cde7d11e1cf8efb7e207"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SJKJQQ5SPYPK2PAM3AKULUFXV3/bundle.json","state_url":"https://pith.science/pith/SJKJQQ5SPYPK2PAM3AKULUFXV3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SJKJQQ5SPYPK2PAM3AKULUFXV3/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":"2026-05-26T23:46:20Z","links":{"resolver":"https://pith.science/pith/SJKJQQ5SPYPK2PAM3AKULUFXV3","bundle":"https://pith.science/pith/SJKJQQ5SPYPK2PAM3AKULUFXV3/bundle.json","state":"https://pith.science/pith/SJKJQQ5SPYPK2PAM3AKULUFXV3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SJKJQQ5SPYPK2PAM3AKULUFXV3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SJKJQQ5SPYPK2PAM3AKULUFXV3","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":"93bbb7a85354c5e8b3f95fed3ebf8ab4883ca491ae62cd4036a25e0da9a3f5ce","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-01T15:48:35Z","title_canon_sha256":"ad21d83bcc16bd645f92b91714877b2b9e349ca98655b7f661f84e8be2d2f710"},"schema_version":"1.0","source":{"id":"1712.00376","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1712.00376","created_at":"2026-05-18T00:29:06Z"},{"alias_kind":"arxiv_version","alias_value":"1712.00376v1","created_at":"2026-05-18T00:29:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1712.00376","created_at":"2026-05-18T00:29:06Z"},{"alias_kind":"pith_short_12","alias_value":"SJKJQQ5SPYPK","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SJKJQQ5SPYPK2PAM","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SJKJQQ5S","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:056f79bce8816fadb8fdd14eacc2b16976bbeec54085cde7d11e1cf8efb7e207","target":"graph","created_at":"2026-05-18T00:29:06Z","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 work, we present a concatenated repetition-polar coding scheme that is aimed at applications requiring highly unbalanced unequal bit-error protection, such as the Beam Interlock System of the Large Hadron Collider at CERN. Even though this concatenation scheme is simple, it reveals significant challenges that may be encountered when designing a concatenated scheme that uses a polar code as an inner code, such as error correlation and unusual decision log-likelihood ratio distributions. We explain and analyze these challenges and we propose two ways to overcome them.","authors_text":"Alexios Balatsoukas-Stimming, Jan Uythoven, Tomasz Podzorny","cross_cats":["eess.SP","math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-01T15:48:35Z","title":"Polar Coding for the Large Hadron Collider: Challenges in Code Concatenation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1712.00376","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":"sha256:4766c427989226c51fe0bb46ca1c7a5e7b1738fdf7cf76c549dc8e3dca86a7ee","target":"record","created_at":"2026-05-18T00:29:06Z","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":"93bbb7a85354c5e8b3f95fed3ebf8ab4883ca491ae62cd4036a25e0da9a3f5ce","cross_cats_sorted":["eess.SP","math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2017-12-01T15:48:35Z","title_canon_sha256":"ad21d83bcc16bd645f92b91714877b2b9e349ca98655b7f661f84e8be2d2f710"},"schema_version":"1.0","source":{"id":"1712.00376","kind":"arxiv","version":1}},"canonical_sha256":"92549843b27e1ead3c0cd81545d0b7aef41aa8a293da5fcf7eecfaa3a5a5c517","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"92549843b27e1ead3c0cd81545d0b7aef41aa8a293da5fcf7eecfaa3a5a5c517","first_computed_at":"2026-05-18T00:29:06.393036Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:29:06.393036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"la9XaKWp9cU4gzPT/juVGam9AlTq7lzXhmwQqu1+vEO/J+n7KZAX7CZsZHAKkWGzXJd/hxtX/KSWuTPyX5NiCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:29:06.393823Z","signed_message":"canonical_sha256_bytes"},"source_id":"1712.00376","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4766c427989226c51fe0bb46ca1c7a5e7b1738fdf7cf76c549dc8e3dca86a7ee","sha256:056f79bce8816fadb8fdd14eacc2b16976bbeec54085cde7d11e1cf8efb7e207"],"state_sha256":"3b1d29c46728e3950d34d3cf85f3cb9633076cf3cd6659b9936cd82c84160117"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MEwz6UvV+wZjt20nK5uxZOLF9RpysyitNXH4cE1reHWmwxPT3puBq8Lj9wl1MBJoPhyMGyMLZ85lspm/LhOIDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T23:46:20.416891Z","bundle_sha256":"09cbed2fa05e170adbe5d2cf4b994d4752de4b32eca9f9d96ad3f75e080aad0b"}}