{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:73EIXW24OGZEIWXRIXMDNB5OVN","short_pith_number":"pith:73EIXW24","canonical_record":{"source":{"id":"1212.3746","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2012-12-16T03:11:59Z","cross_cats_sorted":[],"title_canon_sha256":"44b343b6db0bdc9bc042ae311feb5b67467aca38ae54d3701e985f1c369adad1","abstract_canon_sha256":"58bc86ddfc90b773ae077e3dbfc2b094ed3300da15f78d9d0d9c05e149bf1fd3"},"schema_version":"1.0"},"canonical_sha256":"fec88bdb5c71b2445af145d83687aeab489447279f23f87e81a47c62e8cf71f3","source":{"kind":"arxiv","id":"1212.3746","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.3746","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"arxiv_version","alias_value":"1212.3746v1","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.3746","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"pith_short_12","alias_value":"73EIXW24OGZE","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"73EIXW24OGZEIWXR","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"73EIXW24","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:73EIXW24OGZEIWXRIXMDNB5OVN","target":"record","payload":{"canonical_record":{"source":{"id":"1212.3746","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2012-12-16T03:11:59Z","cross_cats_sorted":[],"title_canon_sha256":"44b343b6db0bdc9bc042ae311feb5b67467aca38ae54d3701e985f1c369adad1","abstract_canon_sha256":"58bc86ddfc90b773ae077e3dbfc2b094ed3300da15f78d9d0d9c05e149bf1fd3"},"schema_version":"1.0"},"canonical_sha256":"fec88bdb5c71b2445af145d83687aeab489447279f23f87e81a47c62e8cf71f3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:20:09.422031Z","signature_b64":"zHS+G6RyVr79jpp85CqjE/JTSV3i+OnNhbz9GUkeUPEOdmfWCDAZDXgKiD7V2buQfzUN05XpUj+CDFf3ljpUDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fec88bdb5c71b2445af145d83687aeab489447279f23f87e81a47c62e8cf71f3","last_reissued_at":"2026-05-18T03:20:09.421616Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:20:09.421616Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.3746","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":"2026-05-18T03:20:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PkdRZF5L6ZZuqE0Wxd3Kye08EjJxjMeeBAYSHw6aawv9NuYJYy4IingeUZbobi1OVd0LvH1RFK6kG/lBT5UYBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:15:06.173231Z"},"content_sha256":"5400837d3c476b4733463c4a1faaf6f207e147de95849287089f678fff9ba6ec","schema_version":"1.0","event_id":"sha256:5400837d3c476b4733463c4a1faaf6f207e147de95849287089f678fff9ba6ec"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:73EIXW24OGZEIWXRIXMDNB5OVN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cross-Layer Design to Maintain Earthquake Sensor Network Connectivity After Loss of Infrastructure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.NI","authors_text":"Greg Steinbrecher","submitted_at":"2012-12-16T03:11:59Z","abstract_excerpt":"We present the design of a cross-layer protocol to maintain connectivity in an earthquake monitoring and early warning sensor network in the absence of communications infrastructure. Such systems, by design, warn of events that severely damage or destroy communications infrastructure. However, the data they provide is of critical importance to emergency and rescue decision making in the immediate aftermath of such events, as is continued early warning of aftershocks, tsunamis, or other subsequent dangers. Utilizing a beyond line-of-sight (BLOS) HF physical layer, we propose an adaptable cross-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.3746","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":"2026-05-18T03:20:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Xht25y2T/emQy6olwdF+Wc5MKOrgj/yOhAs+Xgyu0aMQ5jUddzgfcF/dI4bMJjcWiL2NirjsIuHuUJQKEvxOBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T16:15:06.173596Z"},"content_sha256":"fb4528064ab3ea0a4695a7b36cedd2158940a09ad9fad4753141164ce3d357d5","schema_version":"1.0","event_id":"sha256:fb4528064ab3ea0a4695a7b36cedd2158940a09ad9fad4753141164ce3d357d5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/73EIXW24OGZEIWXRIXMDNB5OVN/bundle.json","state_url":"https://pith.science/pith/73EIXW24OGZEIWXRIXMDNB5OVN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/73EIXW24OGZEIWXRIXMDNB5OVN/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":"2026-06-02T16:15:06Z","links":{"resolver":"https://pith.science/pith/73EIXW24OGZEIWXRIXMDNB5OVN","bundle":"https://pith.science/pith/73EIXW24OGZEIWXRIXMDNB5OVN/bundle.json","state":"https://pith.science/pith/73EIXW24OGZEIWXRIXMDNB5OVN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/73EIXW24OGZEIWXRIXMDNB5OVN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:73EIXW24OGZEIWXRIXMDNB5OVN","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":"58bc86ddfc90b773ae077e3dbfc2b094ed3300da15f78d9d0d9c05e149bf1fd3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2012-12-16T03:11:59Z","title_canon_sha256":"44b343b6db0bdc9bc042ae311feb5b67467aca38ae54d3701e985f1c369adad1"},"schema_version":"1.0","source":{"id":"1212.3746","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.3746","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"arxiv_version","alias_value":"1212.3746v1","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.3746","created_at":"2026-05-18T03:20:09Z"},{"alias_kind":"pith_short_12","alias_value":"73EIXW24OGZE","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"73EIXW24OGZEIWXR","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"73EIXW24","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:fb4528064ab3ea0a4695a7b36cedd2158940a09ad9fad4753141164ce3d357d5","target":"graph","created_at":"2026-05-18T03:20:09Z","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":"We present the design of a cross-layer protocol to maintain connectivity in an earthquake monitoring and early warning sensor network in the absence of communications infrastructure. Such systems, by design, warn of events that severely damage or destroy communications infrastructure. However, the data they provide is of critical importance to emergency and rescue decision making in the immediate aftermath of such events, as is continued early warning of aftershocks, tsunamis, or other subsequent dangers. Utilizing a beyond line-of-sight (BLOS) HF physical layer, we propose an adaptable cross-","authors_text":"Greg Steinbrecher","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2012-12-16T03:11:59Z","title":"Cross-Layer Design to Maintain Earthquake Sensor Network Connectivity After Loss of Infrastructure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.3746","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":"sha256:5400837d3c476b4733463c4a1faaf6f207e147de95849287089f678fff9ba6ec","target":"record","created_at":"2026-05-18T03:20:09Z","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":"58bc86ddfc90b773ae077e3dbfc2b094ed3300da15f78d9d0d9c05e149bf1fd3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NI","submitted_at":"2012-12-16T03:11:59Z","title_canon_sha256":"44b343b6db0bdc9bc042ae311feb5b67467aca38ae54d3701e985f1c369adad1"},"schema_version":"1.0","source":{"id":"1212.3746","kind":"arxiv","version":1}},"canonical_sha256":"fec88bdb5c71b2445af145d83687aeab489447279f23f87e81a47c62e8cf71f3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fec88bdb5c71b2445af145d83687aeab489447279f23f87e81a47c62e8cf71f3","first_computed_at":"2026-05-18T03:20:09.421616Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:20:09.421616Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zHS+G6RyVr79jpp85CqjE/JTSV3i+OnNhbz9GUkeUPEOdmfWCDAZDXgKiD7V2buQfzUN05XpUj+CDFf3ljpUDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:20:09.422031Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.3746","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5400837d3c476b4733463c4a1faaf6f207e147de95849287089f678fff9ba6ec","sha256:fb4528064ab3ea0a4695a7b36cedd2158940a09ad9fad4753141164ce3d357d5"],"state_sha256":"cb5fc4ca640a6610615fc4f39ef3d507153ede9710ace5b4ab213d4e8a2ec606"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0DxMJKVGcbgDzlnJ7/4+iRLUVzlJJ8e5g9OIPL8mjFzEXVnHwTVLVVoui99/AtR3JbhxVJlsRHY6NTOV3yWnBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T16:15:06.175577Z","bundle_sha256":"fad5552ec2374e56b5d2768d1fe0eaa09856088249c54ed0b9740d8c5148e04c"}}