{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XHYRMDFKHNSZ4QJMGIJXRVBUI5","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":"7f375f0c0369789b3977ae68fe3c2ceeef16ba8edf5f5585eddfecf931763fe4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-05-16T02:30:23Z","title_canon_sha256":"3207d160f4f0be33dda3be3c843807cf0215303e144d8128fcc38bb3fe7d11ee"},"schema_version":"1.0","source":{"id":"1905.06504","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.06504","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"arxiv_version","alias_value":"1905.06504v1","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.06504","created_at":"2026-05-17T23:46:02Z"},{"alias_kind":"pith_short_12","alias_value":"XHYRMDFKHNSZ","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XHYRMDFKHNSZ4QJM","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XHYRMDFK","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:50ef9fb82207f9ef8b244916b4e19ac9be724ff6c68308874d3782fcfda33842","target":"graph","created_at":"2026-05-17T23:46:02Z","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 explores the possibility to construct two-terminal mechanical devices (one-ports) which are lossless and adjustable. To be lossless, the device must be passive (i.e. not requiring a power supply) and non-dissipative. To be adjustable, a parameter of the device should be freely variable in real time as a control input. For the simplest lossless one ports, the spring and inerter, the question is whether the stiffness and inertance may be varied freely in a lossless manner. We will show that the typical laws which have been proposed for adjustable springs and inerters are necessarily a","authors_text":"Faryar Jabbari, Malcolm C. Smith, Tryphon T. Georgiou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-05-16T02:30:23Z","title":"Principles of lossless adjustable one-ports"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.06504","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:e13175f776fb3d60ccb873948c4d9928f2a06eee18f50da1da4bb8621b5d5745","target":"record","created_at":"2026-05-17T23:46:02Z","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":"7f375f0c0369789b3977ae68fe3c2ceeef16ba8edf5f5585eddfecf931763fe4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SY","submitted_at":"2019-05-16T02:30:23Z","title_canon_sha256":"3207d160f4f0be33dda3be3c843807cf0215303e144d8128fcc38bb3fe7d11ee"},"schema_version":"1.0","source":{"id":"1905.06504","kind":"arxiv","version":1}},"canonical_sha256":"b9f1160caa3b659e412c321378d4344776f4ec882a0bca1c149c1679fc67f2b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b9f1160caa3b659e412c321378d4344776f4ec882a0bca1c149c1679fc67f2b2","first_computed_at":"2026-05-17T23:46:02.135796Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:02.135796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mOMYB6P6F39qHJPJUbJnQbvZN8mgtYhpBpVHCYukBEdu6G/JjJmFtzq3Fe35b8U6KFyG7UA5Kp6PB+oELZK4DQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:02.136453Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.06504","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e13175f776fb3d60ccb873948c4d9928f2a06eee18f50da1da4bb8621b5d5745","sha256:50ef9fb82207f9ef8b244916b4e19ac9be724ff6c68308874d3782fcfda33842"],"state_sha256":"b3ffe82292c57c269fbead29086543099a0a271075a5dbf129640a9ca7c0b014"}