{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:XRC6ITKQJG3MESYNKVAPAWYGDJ","short_pith_number":"pith:XRC6ITKQ","canonical_record":{"source":{"id":"1507.07256","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-07-26T21:55:09Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"bda7e7ab8c815b5428928a4daf599dc0f14a72d30a19f9254ce21da510169852","abstract_canon_sha256":"507050e3f0563836ef1b0d0ca3be9b7f7a7ca35bcd420a0403a1ea51505ef7c4"},"schema_version":"1.0"},"canonical_sha256":"bc45e44d5049b6c24b0d5540f05b061a4bd68b12cb48bba4a063d8a85251d9ba","source":{"kind":"arxiv","id":"1507.07256","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.07256","created_at":"2026-05-18T01:11:51Z"},{"alias_kind":"arxiv_version","alias_value":"1507.07256v2","created_at":"2026-05-18T01:11:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.07256","created_at":"2026-05-18T01:11:51Z"},{"alias_kind":"pith_short_12","alias_value":"XRC6ITKQJG3M","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XRC6ITKQJG3MESYN","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XRC6ITKQ","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:XRC6ITKQJG3MESYNKVAPAWYGDJ","target":"record","payload":{"canonical_record":{"source":{"id":"1507.07256","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-07-26T21:55:09Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"bda7e7ab8c815b5428928a4daf599dc0f14a72d30a19f9254ce21da510169852","abstract_canon_sha256":"507050e3f0563836ef1b0d0ca3be9b7f7a7ca35bcd420a0403a1ea51505ef7c4"},"schema_version":"1.0"},"canonical_sha256":"bc45e44d5049b6c24b0d5540f05b061a4bd68b12cb48bba4a063d8a85251d9ba","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:51.498907Z","signature_b64":"rWnNgP997rv4cHhl/VIvzSFRBZvVKzRJUV4Syd2MW7bFFSEgHeCe0HJfOXd1JlJrHLe6mzV4xnLq6XkWho3nBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bc45e44d5049b6c24b0d5540f05b061a4bd68b12cb48bba4a063d8a85251d9ba","last_reissued_at":"2026-05-18T01:11:51.498572Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:51.498572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.07256","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:11:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HUx3Vb0PKliZHaOGpKDeVcHbKWVR2Tkq2S1ZQaAxlvkj4qdIZXsh9tf0lRzbu+w3efxVEPWbpqAn/NEioyBVBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T15:45:30.682912Z"},"content_sha256":"af2cabe9b54d31453ff26fac62cda008b2da84a9ab66372ce9b1af5e5e684b1e","schema_version":"1.0","event_id":"sha256:af2cabe9b54d31453ff26fac62cda008b2da84a9ab66372ce9b1af5e5e684b1e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:XRC6ITKQJG3MESYNKVAPAWYGDJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stable Support Recovery of Stream of Pulses with Application to Ultrasound Imaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Arie Feuer, Avinoam Bar-Zion, Dan Adam, Shai Dekel, Tamir Bendory","submitted_at":"2015-07-26T21:55:09Z","abstract_excerpt":"This paper considers the problem of estimating the delays of a weighted superposition of pulses, called stream of pulses, in a noisy environment. We show that the delays can be estimated using a tractable convex optimization problem with a localization error proportional to the square root of the noise level. Furthermore, all false detections produced by the algorithm have small amplitudes. Numerical and in-vitro ultrasound experiments corroborate the theoretical results and demonstrate their applicability for the ultrasound imaging signal processing."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07256","kind":"arxiv","version":2},"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":"2026-05-18T01:11:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y8sB9pY8MvzBEienNH0jbHIq0ahiTRvuKfj00BNQfOu/15rIxIcdUknSxI4bNdyklJnkvQLB4LNhAY2bOFVkCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T15:45:30.683255Z"},"content_sha256":"79f1bf5f5bc2a7403262f6f0c93d75f2a07901dc45cf23fb6bc214d755463560","schema_version":"1.0","event_id":"sha256:79f1bf5f5bc2a7403262f6f0c93d75f2a07901dc45cf23fb6bc214d755463560"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XRC6ITKQJG3MESYNKVAPAWYGDJ/bundle.json","state_url":"https://pith.science/pith/XRC6ITKQJG3MESYNKVAPAWYGDJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XRC6ITKQJG3MESYNKVAPAWYGDJ/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":"2026-05-21T15:45:30Z","links":{"resolver":"https://pith.science/pith/XRC6ITKQJG3MESYNKVAPAWYGDJ","bundle":"https://pith.science/pith/XRC6ITKQJG3MESYNKVAPAWYGDJ/bundle.json","state":"https://pith.science/pith/XRC6ITKQJG3MESYNKVAPAWYGDJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XRC6ITKQJG3MESYNKVAPAWYGDJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:XRC6ITKQJG3MESYNKVAPAWYGDJ","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":"507050e3f0563836ef1b0d0ca3be9b7f7a7ca35bcd420a0403a1ea51505ef7c4","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-07-26T21:55:09Z","title_canon_sha256":"bda7e7ab8c815b5428928a4daf599dc0f14a72d30a19f9254ce21da510169852"},"schema_version":"1.0","source":{"id":"1507.07256","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.07256","created_at":"2026-05-18T01:11:51Z"},{"alias_kind":"arxiv_version","alias_value":"1507.07256v2","created_at":"2026-05-18T01:11:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.07256","created_at":"2026-05-18T01:11:51Z"},{"alias_kind":"pith_short_12","alias_value":"XRC6ITKQJG3M","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XRC6ITKQJG3MESYN","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XRC6ITKQ","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:79f1bf5f5bc2a7403262f6f0c93d75f2a07901dc45cf23fb6bc214d755463560","target":"graph","created_at":"2026-05-18T01:11:51Z","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":"This paper considers the problem of estimating the delays of a weighted superposition of pulses, called stream of pulses, in a noisy environment. We show that the delays can be estimated using a tractable convex optimization problem with a localization error proportional to the square root of the noise level. Furthermore, all false detections produced by the algorithm have small amplitudes. Numerical and in-vitro ultrasound experiments corroborate the theoretical results and demonstrate their applicability for the ultrasound imaging signal processing.","authors_text":"Arie Feuer, Avinoam Bar-Zion, Dan Adam, Shai Dekel, Tamir Bendory","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-07-26T21:55:09Z","title":"Stable Support Recovery of Stream of Pulses with Application to Ultrasound Imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.07256","kind":"arxiv","version":2},"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:af2cabe9b54d31453ff26fac62cda008b2da84a9ab66372ce9b1af5e5e684b1e","target":"record","created_at":"2026-05-18T01:11:51Z","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":"507050e3f0563836ef1b0d0ca3be9b7f7a7ca35bcd420a0403a1ea51505ef7c4","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2015-07-26T21:55:09Z","title_canon_sha256":"bda7e7ab8c815b5428928a4daf599dc0f14a72d30a19f9254ce21da510169852"},"schema_version":"1.0","source":{"id":"1507.07256","kind":"arxiv","version":2}},"canonical_sha256":"bc45e44d5049b6c24b0d5540f05b061a4bd68b12cb48bba4a063d8a85251d9ba","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc45e44d5049b6c24b0d5540f05b061a4bd68b12cb48bba4a063d8a85251d9ba","first_computed_at":"2026-05-18T01:11:51.498572Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:51.498572Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rWnNgP997rv4cHhl/VIvzSFRBZvVKzRJUV4Syd2MW7bFFSEgHeCe0HJfOXd1JlJrHLe6mzV4xnLq6XkWho3nBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:51.498907Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.07256","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:af2cabe9b54d31453ff26fac62cda008b2da84a9ab66372ce9b1af5e5e684b1e","sha256:79f1bf5f5bc2a7403262f6f0c93d75f2a07901dc45cf23fb6bc214d755463560"],"state_sha256":"fd9fa726ef218404cf144cc54c6671c806bb3f003b32e4b763afec2145ad9734"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZV9YjsqRnK3eGVWVpEZiQR6zx9Qz+0VC5OIyWORx9LWkARzCVixE4kljJHwRvFA/W0Ci8GkJNHMtq19KuhsQBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T15:45:30.685352Z","bundle_sha256":"2df57cb3e15d42ff3ac364958ebff91d8025349b0fb913ffedc86897191b6dc8"}}