{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:DD4FRCLFTHS5TAAPZWLHWQXQII","short_pith_number":"pith:DD4FRCLF","canonical_record":{"source":{"id":"2011.07470","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-11-15T07:57:03Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"18e42b96962690cb612e67eab36f2d9b025f85f7b563f4cb2003b4dfcccd9a37","abstract_canon_sha256":"9fdf5c1760542a5fcc3e0d9029b24da74eaa31c324a1bb026164c5d734395080"},"schema_version":"1.0"},"canonical_sha256":"18f858896599e5d9800fcd967b42f0420e6d2e11ac683442542f92be85f84563","source":{"kind":"arxiv","id":"2011.07470","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.07470","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"arxiv_version","alias_value":"2011.07470v1","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.07470","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"pith_short_12","alias_value":"DD4FRCLFTHS5","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"pith_short_16","alias_value":"DD4FRCLFTHS5TAAP","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"pith_short_8","alias_value":"DD4FRCLF","created_at":"2026-07-05T01:51:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:DD4FRCLFTHS5TAAPZWLHWQXQII","target":"record","payload":{"canonical_record":{"source":{"id":"2011.07470","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-11-15T07:57:03Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"18e42b96962690cb612e67eab36f2d9b025f85f7b563f4cb2003b4dfcccd9a37","abstract_canon_sha256":"9fdf5c1760542a5fcc3e0d9029b24da74eaa31c324a1bb026164c5d734395080"},"schema_version":"1.0"},"canonical_sha256":"18f858896599e5d9800fcd967b42f0420e6d2e11ac683442542f92be85f84563","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:51:50.063590Z","signature_b64":"k+4OEmXYbohqTPtmPVGa17rK7fOwv4twVlnxC2RrzDrVVU2opGjwoVsPyCRFOxxpmFOdpZCFaMX5ki75f3o8CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"18f858896599e5d9800fcd967b42f0420e6d2e11ac683442542f92be85f84563","last_reissued_at":"2026-07-05T01:51:50.063093Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:51:50.063093Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.07470","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":"2026-07-05T01:51:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ydtVDSW0mVNlT+TLBxw+QykeZmVtLNRL6SluNtPqtVKApIO5HOaD8qgUoKeR37gsfr5c9fs0IejC0E5QEHPlCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T06:15:22.239588Z"},"content_sha256":"7107015388bdfbafdf32a6fadd13909da2e5dbc8df074cc0bc60b8a47f84f000","schema_version":"1.0","event_id":"sha256:7107015388bdfbafdf32a6fadd13909da2e5dbc8df074cc0bc60b8a47f84f000"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:DD4FRCLFTHS5TAAPZWLHWQXQII","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An efficient label-free analyte detection algorithm for time-resolved spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"cs.LG","authors_text":"Hirotsugu Hiramatsu, Stefano Rini","submitted_at":"2020-11-15T07:57:03Z","abstract_excerpt":"Time-resolved spectral techniques play an important analysis tool in many contexts, from physical chemistry to biomedicine. Customarily, the label-free detection of analytes is manually performed by experts through the aid of classic dimensionality-reduction methods, such as Principal Component Analysis (PCA) and Non-negative Matrix Factorization (NMF). This fundamental reliance on expert analysis for unknown analyte detection severely hinders the applicability and the throughput of these such techniques. For this reason, in this paper, we formulate this detection problem as an unsupervised le"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.07470","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/2011.07470/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":"2026-07-05T01:51:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"muVhcbKvUM7JDfAUkmONTAlfWLscqmcW9D3MOJyzHS75Ap1evV3X1pqY5warf1dS2w0OoiBBPmY6S2ezbPCMAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T06:15:22.241852Z"},"content_sha256":"b299e55a0c82f150c74c6bf8cfa196fe921e507bc4709a33035e715197b6b342","schema_version":"1.0","event_id":"sha256:b299e55a0c82f150c74c6bf8cfa196fe921e507bc4709a33035e715197b6b342"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DD4FRCLFTHS5TAAPZWLHWQXQII/bundle.json","state_url":"https://pith.science/pith/DD4FRCLFTHS5TAAPZWLHWQXQII/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DD4FRCLFTHS5TAAPZWLHWQXQII/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":"2026-08-06T06:15:22Z","links":{"resolver":"https://pith.science/pith/DD4FRCLFTHS5TAAPZWLHWQXQII","bundle":"https://pith.science/pith/DD4FRCLFTHS5TAAPZWLHWQXQII/bundle.json","state":"https://pith.science/pith/DD4FRCLFTHS5TAAPZWLHWQXQII/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DD4FRCLFTHS5TAAPZWLHWQXQII/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:DD4FRCLFTHS5TAAPZWLHWQXQII","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":"9fdf5c1760542a5fcc3e0d9029b24da74eaa31c324a1bb026164c5d734395080","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-11-15T07:57:03Z","title_canon_sha256":"18e42b96962690cb612e67eab36f2d9b025f85f7b563f4cb2003b4dfcccd9a37"},"schema_version":"1.0","source":{"id":"2011.07470","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.07470","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"arxiv_version","alias_value":"2011.07470v1","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.07470","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"pith_short_12","alias_value":"DD4FRCLFTHS5","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"pith_short_16","alias_value":"DD4FRCLFTHS5TAAP","created_at":"2026-07-05T01:51:50Z"},{"alias_kind":"pith_short_8","alias_value":"DD4FRCLF","created_at":"2026-07-05T01:51:50Z"}],"graph_snapshots":[{"event_id":"sha256:b299e55a0c82f150c74c6bf8cfa196fe921e507bc4709a33035e715197b6b342","target":"graph","created_at":"2026-07-05T01:51:50Z","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/2011.07470/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Time-resolved spectral techniques play an important analysis tool in many contexts, from physical chemistry to biomedicine. Customarily, the label-free detection of analytes is manually performed by experts through the aid of classic dimensionality-reduction methods, such as Principal Component Analysis (PCA) and Non-negative Matrix Factorization (NMF). This fundamental reliance on expert analysis for unknown analyte detection severely hinders the applicability and the throughput of these such techniques. For this reason, in this paper, we formulate this detection problem as an unsupervised le","authors_text":"Hirotsugu Hiramatsu, Stefano Rini","cross_cats":["eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-11-15T07:57:03Z","title":"An efficient label-free analyte detection algorithm for time-resolved spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.07470","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":"sha256:7107015388bdfbafdf32a6fadd13909da2e5dbc8df074cc0bc60b8a47f84f000","target":"record","created_at":"2026-07-05T01:51:50Z","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":"9fdf5c1760542a5fcc3e0d9029b24da74eaa31c324a1bb026164c5d734395080","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.LG","submitted_at":"2020-11-15T07:57:03Z","title_canon_sha256":"18e42b96962690cb612e67eab36f2d9b025f85f7b563f4cb2003b4dfcccd9a37"},"schema_version":"1.0","source":{"id":"2011.07470","kind":"arxiv","version":1}},"canonical_sha256":"18f858896599e5d9800fcd967b42f0420e6d2e11ac683442542f92be85f84563","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"18f858896599e5d9800fcd967b42f0420e6d2e11ac683442542f92be85f84563","first_computed_at":"2026-07-05T01:51:50.063093Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:51:50.063093Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k+4OEmXYbohqTPtmPVGa17rK7fOwv4twVlnxC2RrzDrVVU2opGjwoVsPyCRFOxxpmFOdpZCFaMX5ki75f3o8CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:51:50.063590Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.07470","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7107015388bdfbafdf32a6fadd13909da2e5dbc8df074cc0bc60b8a47f84f000","sha256:b299e55a0c82f150c74c6bf8cfa196fe921e507bc4709a33035e715197b6b342"],"state_sha256":"a920f839a30d70d466730c5e7cd99a005133b4ff0f77736fc1ed2574944a070f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oZ8EFruGmfGRlTSZo37NGkzBVTFQxRy2Lcyhi/nUYVK0dOMOGAa5pUyPrJEDohs8jov++6opipLu5LINcrmGCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T06:15:22.246441Z","bundle_sha256":"3a41f6737dff1ad1e8e3351c97de37b3c99336f191f02c9ef1c4400d1a417b51"}}