{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:P3OLNOBYF73H2L2VCOWHGTI7VJ","short_pith_number":"pith:P3OLNOBY","canonical_record":{"source":{"id":"1801.07527","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-23T13:20:08Z","cross_cats_sorted":[],"title_canon_sha256":"10711318f845021d9f8de38afdefb66c1c0a14d20cfe0e65b676a209133d01a4","abstract_canon_sha256":"0ceebcc0da1c2f746054055fb705d7dc2581ac33f4d3bfcdaaf5af3af2846413"},"schema_version":"1.0"},"canonical_sha256":"7edcb6b8382ff67d2f5513ac734d1faa443864cbae16311298019a91dfa8862f","source":{"kind":"arxiv","id":"1801.07527","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.07527","created_at":"2026-05-18T00:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"1801.07527v1","created_at":"2026-05-18T00:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07527","created_at":"2026-05-18T00:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"P3OLNOBYF73H","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"P3OLNOBYF73H2L2V","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"P3OLNOBY","created_at":"2026-05-18T12:32:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:P3OLNOBYF73H2L2VCOWHGTI7VJ","target":"record","payload":{"canonical_record":{"source":{"id":"1801.07527","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-23T13:20:08Z","cross_cats_sorted":[],"title_canon_sha256":"10711318f845021d9f8de38afdefb66c1c0a14d20cfe0e65b676a209133d01a4","abstract_canon_sha256":"0ceebcc0da1c2f746054055fb705d7dc2581ac33f4d3bfcdaaf5af3af2846413"},"schema_version":"1.0"},"canonical_sha256":"7edcb6b8382ff67d2f5513ac734d1faa443864cbae16311298019a91dfa8862f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:25:12.667506Z","signature_b64":"TRdGC6fGi4xjHgn41bB4UpIWQ1PGdQ9HFUADYJylfa898LGBK5CG+hytiQT+IdUvAA+nV6pW3hRQ7kypyxLaAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7edcb6b8382ff67d2f5513ac734d1faa443864cbae16311298019a91dfa8862f","last_reissued_at":"2026-05-18T00:25:12.666976Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:25:12.666976Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.07527","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":"2026-05-18T00:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Kdv0PzX74i4qS4el+S7eezy5z8/eSnwLLBo3TYgVL8xyHokJ4ktP6hVSM9SRTliQJgmR0saJL3XTNzLsqJCLBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:02:34.819280Z"},"content_sha256":"db74f9deb85a1a63b08d2218aa375b502f3c82e596cf4fcc57749cb26a23514a","schema_version":"1.0","event_id":"sha256:db74f9deb85a1a63b08d2218aa375b502f3c82e596cf4fcc57749cb26a23514a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:P3OLNOBYF73H2L2VCOWHGTI7VJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Graphene gas pumps","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.app-ph","authors_text":"Damian Bouwmeester, Dejan Davidovikj, Herre S. J. van der Zant, Peter G. Steeneken","submitted_at":"2018-01-23T13:20:08Z","abstract_excerpt":"We report on the development of a pneumatically coupled graphene membrane system, comprising of two circular cavities connected by a narrow trench. Both cavities and the trench are covered by a thin few-layer graphene membrane to form a sealed dumbbell shaped chamber. Local electrodes at the bottom of each cavity allow for actuation of each membrane separately, enabling electrical control and manipulation of the gas flow inside the channel. Using laser interferometry, we measure the displacement of each drum at atmospheric pressure, as a function of the frequency of the electrostatic driving f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07527","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":"2026-05-18T00:25:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sKGbu3hFzt5x1YaJelWkaWL+6zqneXweXhIp1GKM8OIkSTUKBIRTaQH9f86sVGFfODiOo4kfPfvr/5obTz6dAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T20:02:34.819631Z"},"content_sha256":"77b8763a565e75596c2832fb1053311547f2a067ef60b4e722596058e1a5ac36","schema_version":"1.0","event_id":"sha256:77b8763a565e75596c2832fb1053311547f2a067ef60b4e722596058e1a5ac36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P3OLNOBYF73H2L2VCOWHGTI7VJ/bundle.json","state_url":"https://pith.science/pith/P3OLNOBYF73H2L2VCOWHGTI7VJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P3OLNOBYF73H2L2VCOWHGTI7VJ/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":"2026-06-01T20:02:34Z","links":{"resolver":"https://pith.science/pith/P3OLNOBYF73H2L2VCOWHGTI7VJ","bundle":"https://pith.science/pith/P3OLNOBYF73H2L2VCOWHGTI7VJ/bundle.json","state":"https://pith.science/pith/P3OLNOBYF73H2L2VCOWHGTI7VJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P3OLNOBYF73H2L2VCOWHGTI7VJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:P3OLNOBYF73H2L2VCOWHGTI7VJ","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":"0ceebcc0da1c2f746054055fb705d7dc2581ac33f4d3bfcdaaf5af3af2846413","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-23T13:20:08Z","title_canon_sha256":"10711318f845021d9f8de38afdefb66c1c0a14d20cfe0e65b676a209133d01a4"},"schema_version":"1.0","source":{"id":"1801.07527","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.07527","created_at":"2026-05-18T00:25:12Z"},{"alias_kind":"arxiv_version","alias_value":"1801.07527v1","created_at":"2026-05-18T00:25:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.07527","created_at":"2026-05-18T00:25:12Z"},{"alias_kind":"pith_short_12","alias_value":"P3OLNOBYF73H","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_16","alias_value":"P3OLNOBYF73H2L2V","created_at":"2026-05-18T12:32:43Z"},{"alias_kind":"pith_short_8","alias_value":"P3OLNOBY","created_at":"2026-05-18T12:32:43Z"}],"graph_snapshots":[{"event_id":"sha256:77b8763a565e75596c2832fb1053311547f2a067ef60b4e722596058e1a5ac36","target":"graph","created_at":"2026-05-18T00:25:12Z","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 report on the development of a pneumatically coupled graphene membrane system, comprising of two circular cavities connected by a narrow trench. Both cavities and the trench are covered by a thin few-layer graphene membrane to form a sealed dumbbell shaped chamber. Local electrodes at the bottom of each cavity allow for actuation of each membrane separately, enabling electrical control and manipulation of the gas flow inside the channel. Using laser interferometry, we measure the displacement of each drum at atmospheric pressure, as a function of the frequency of the electrostatic driving f","authors_text":"Damian Bouwmeester, Dejan Davidovikj, Herre S. J. van der Zant, Peter G. Steeneken","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-23T13:20:08Z","title":"Graphene gas pumps"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.07527","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:db74f9deb85a1a63b08d2218aa375b502f3c82e596cf4fcc57749cb26a23514a","target":"record","created_at":"2026-05-18T00:25:12Z","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":"0ceebcc0da1c2f746054055fb705d7dc2581ac33f4d3bfcdaaf5af3af2846413","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2018-01-23T13:20:08Z","title_canon_sha256":"10711318f845021d9f8de38afdefb66c1c0a14d20cfe0e65b676a209133d01a4"},"schema_version":"1.0","source":{"id":"1801.07527","kind":"arxiv","version":1}},"canonical_sha256":"7edcb6b8382ff67d2f5513ac734d1faa443864cbae16311298019a91dfa8862f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7edcb6b8382ff67d2f5513ac734d1faa443864cbae16311298019a91dfa8862f","first_computed_at":"2026-05-18T00:25:12.666976Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:25:12.666976Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TRdGC6fGi4xjHgn41bB4UpIWQ1PGdQ9HFUADYJylfa898LGBK5CG+hytiQT+IdUvAA+nV6pW3hRQ7kypyxLaAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:25:12.667506Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.07527","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:db74f9deb85a1a63b08d2218aa375b502f3c82e596cf4fcc57749cb26a23514a","sha256:77b8763a565e75596c2832fb1053311547f2a067ef60b4e722596058e1a5ac36"],"state_sha256":"0243d8f59fc7a2afc0dafb3cfe38a66bcebea575b5b0d3b3a0aeed1fe64fe4ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uu+DN6NhiCnqd7eTGcBxrQYCQ8C3KFfoR8P2eHeEDChoJLI57zGouzMe7ktzh8Xx+8LAZuFN/4lB3T7uWmudCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T20:02:34.821727Z","bundle_sha256":"3135205e227c797a514db6b2718099128f8a7f18ab236541e93f83e0ab58dae7"}}