{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:MA7PL4GLWZIROWMINZGVPXDIWK","short_pith_number":"pith:MA7PL4GL","canonical_record":{"source":{"id":"2204.03748","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2022-04-07T21:28:44Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"298e04e30b7b9452f8ce874f4be50f00ea9769df8fac15a61f7f9a579ae1a330","abstract_canon_sha256":"d68f63bb1a78b4b5407805ebfaa397651194503010c31a3c4950626d10df5fe1"},"schema_version":"1.0"},"canonical_sha256":"603ef5f0cbb6511759886e4d57dc68b28fe6cae3717ef850c1ce2e500a193125","source":{"kind":"arxiv","id":"2204.03748","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.03748","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"arxiv_version","alias_value":"2204.03748v1","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.03748","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"pith_short_12","alias_value":"MA7PL4GLWZIR","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"pith_short_16","alias_value":"MA7PL4GLWZIROWMI","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"pith_short_8","alias_value":"MA7PL4GL","created_at":"2026-07-05T04:12:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:MA7PL4GLWZIROWMINZGVPXDIWK","target":"record","payload":{"canonical_record":{"source":{"id":"2204.03748","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2022-04-07T21:28:44Z","cross_cats_sorted":["cs.SY"],"title_canon_sha256":"298e04e30b7b9452f8ce874f4be50f00ea9769df8fac15a61f7f9a579ae1a330","abstract_canon_sha256":"d68f63bb1a78b4b5407805ebfaa397651194503010c31a3c4950626d10df5fe1"},"schema_version":"1.0"},"canonical_sha256":"603ef5f0cbb6511759886e4d57dc68b28fe6cae3717ef850c1ce2e500a193125","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:12:41.443765Z","signature_b64":"BaCixY4SPKUlvB3pfgNkIADsaFfWBS0V8LWw+c7NgHL+7R6pbnSPPzV0IiIKL5BubOvxV9a6x+abVJ1p2jFzDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"603ef5f0cbb6511759886e4d57dc68b28fe6cae3717ef850c1ce2e500a193125","last_reissued_at":"2026-07-05T04:12:41.443297Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:12:41.443297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2204.03748","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":"2026-07-05T04:12:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jR0MagIz0mtUIDvO7kfidYpI5lMHyium8Yj6d3O5hoiRor6LMB024olLHcP2txwnk1lJ+Fd+3of2fZXpGdS/Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T09:25:01.682998Z"},"content_sha256":"fb4adefa9b4c2f10efbc89b2e47dd99e2c98d4fe1df41fffcd903b909b1d1fc0","schema_version":"1.0","event_id":"sha256:fb4adefa9b4c2f10efbc89b2e47dd99e2c98d4fe1df41fffcd903b909b1d1fc0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:MA7PL4GLWZIROWMINZGVPXDIWK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Energy self-sufficient systems for monitoring sewer networks","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["cs.SY"],"primary_cat":"eess.SY","authors_text":"Christian Ebi, Frank Blumensaat, J\\\"org Rieckermann, Juan-Mario Gruber, Simon Bloem, Simon Mathis","submitted_at":"2022-04-07T21:28:44Z","abstract_excerpt":"Underground infrastructure networks form the backbone of vital supply and disposal systems. However, they are under-monitored in comparison to their value. This is due, in large part, to the lack of energy supply for monitoring and data transmission. In this paper, we investigate a novel, energy harvesting system used to power underground sewer infrastructure monitoring networks. The system collects the required energy from ambient sources, such as temperature differences or residual light in sewer networks. A prototype was developed that could use either a thermoelectric generator (TEG) or a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.03748","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/2204.03748/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":"2026-07-05T04:12:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KJY2E6ZbYMh7Vuh6EKFyyRfnRivm712DD2ghFC0YdHU7KamlJ8ysuFXBvXxRaKL6pGuoTGEdFiQRnQTDoG4lCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T09:25:01.683513Z"},"content_sha256":"3f0cdab46d3ad1ef6316ad3742431cf650a44dc50d8f6842c68679f26b83a671","schema_version":"1.0","event_id":"sha256:3f0cdab46d3ad1ef6316ad3742431cf650a44dc50d8f6842c68679f26b83a671"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MA7PL4GLWZIROWMINZGVPXDIWK/bundle.json","state_url":"https://pith.science/pith/MA7PL4GLWZIROWMINZGVPXDIWK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MA7PL4GLWZIROWMINZGVPXDIWK/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":"2026-08-19T09:25:01Z","links":{"resolver":"https://pith.science/pith/MA7PL4GLWZIROWMINZGVPXDIWK","bundle":"https://pith.science/pith/MA7PL4GLWZIROWMINZGVPXDIWK/bundle.json","state":"https://pith.science/pith/MA7PL4GLWZIROWMINZGVPXDIWK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MA7PL4GLWZIROWMINZGVPXDIWK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:MA7PL4GLWZIROWMINZGVPXDIWK","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":"d68f63bb1a78b4b5407805ebfaa397651194503010c31a3c4950626d10df5fe1","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2022-04-07T21:28:44Z","title_canon_sha256":"298e04e30b7b9452f8ce874f4be50f00ea9769df8fac15a61f7f9a579ae1a330"},"schema_version":"1.0","source":{"id":"2204.03748","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2204.03748","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"arxiv_version","alias_value":"2204.03748v1","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2204.03748","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"pith_short_12","alias_value":"MA7PL4GLWZIR","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"pith_short_16","alias_value":"MA7PL4GLWZIROWMI","created_at":"2026-07-05T04:12:41Z"},{"alias_kind":"pith_short_8","alias_value":"MA7PL4GL","created_at":"2026-07-05T04:12:41Z"}],"graph_snapshots":[{"event_id":"sha256:3f0cdab46d3ad1ef6316ad3742431cf650a44dc50d8f6842c68679f26b83a671","target":"graph","created_at":"2026-07-05T04:12:41Z","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/2204.03748/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Underground infrastructure networks form the backbone of vital supply and disposal systems. However, they are under-monitored in comparison to their value. This is due, in large part, to the lack of energy supply for monitoring and data transmission. In this paper, we investigate a novel, energy harvesting system used to power underground sewer infrastructure monitoring networks. The system collects the required energy from ambient sources, such as temperature differences or residual light in sewer networks. A prototype was developed that could use either a thermoelectric generator (TEG) or a ","authors_text":"Christian Ebi, Frank Blumensaat, J\\\"org Rieckermann, Juan-Mario Gruber, Simon Bloem, Simon Mathis","cross_cats":["cs.SY"],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2022-04-07T21:28:44Z","title":"Energy self-sufficient systems for monitoring sewer networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2204.03748","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:fb4adefa9b4c2f10efbc89b2e47dd99e2c98d4fe1df41fffcd903b909b1d1fc0","target":"record","created_at":"2026-07-05T04:12:41Z","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":"d68f63bb1a78b4b5407805ebfaa397651194503010c31a3c4950626d10df5fe1","cross_cats_sorted":["cs.SY"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"eess.SY","submitted_at":"2022-04-07T21:28:44Z","title_canon_sha256":"298e04e30b7b9452f8ce874f4be50f00ea9769df8fac15a61f7f9a579ae1a330"},"schema_version":"1.0","source":{"id":"2204.03748","kind":"arxiv","version":1}},"canonical_sha256":"603ef5f0cbb6511759886e4d57dc68b28fe6cae3717ef850c1ce2e500a193125","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"603ef5f0cbb6511759886e4d57dc68b28fe6cae3717ef850c1ce2e500a193125","first_computed_at":"2026-07-05T04:12:41.443297Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:12:41.443297Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BaCixY4SPKUlvB3pfgNkIADsaFfWBS0V8LWw+c7NgHL+7R6pbnSPPzV0IiIKL5BubOvxV9a6x+abVJ1p2jFzDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:12:41.443765Z","signed_message":"canonical_sha256_bytes"},"source_id":"2204.03748","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fb4adefa9b4c2f10efbc89b2e47dd99e2c98d4fe1df41fffcd903b909b1d1fc0","sha256:3f0cdab46d3ad1ef6316ad3742431cf650a44dc50d8f6842c68679f26b83a671"],"state_sha256":"c4ddcd232ec54f4cebcc8655f3bd9f62722091704c6a2dbe1c9ad1f0cac6a1bc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xpjOJpDEk4pSUFtEMsfLMWEDw4NssmTpqNQp9UjeADcDLl/ZkXvBel/BCKJGuGXewwOdt5sTJPzScwBY9KyLBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T09:25:01.688884Z","bundle_sha256":"9f9cd26d8458a21e68a33d90bad016036ab7ce876e5aa9edc5bf0248442aa48a"}}