{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:QM4I7VMBRFKO7WPIPZSHUXC4IO","short_pith_number":"pith:QM4I7VMB","schema_version":"1.0","canonical_sha256":"83388fd5818954efd9e87e647a5c5c4389035f9903a72a262d0a64c7563c1356","source":{"kind":"arxiv","id":"2007.12116","version":1},"attestation_state":"computed","paper":{"title":"Experimental behaviour of a three-stage metal hydride hydrogen compressor","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"A.R. Galvis, F. Cuevas, F. Leardini, J.F. Fernandez, J.R. Ares","submitted_at":"2020-07-23T16:42:25Z","abstract_excerpt":"A three-stage metal hydride hydrogen compressor (MHHC) system based in AB2-type alloys has been set-up. Every stage can be considered as a Sieverts-type apparatus. The MHHC system can work in the pressure and temperature ranges comprised from vacuum to 250 bar and from RT to 200C, respectively. An efficient thermal management system was set up for the operational ranges of temperature designed. It dumps temperature shifts due to hydrogen expansion during stage coupling and hydrogen absorption/desorption in the alloys. Each reactor consists of a single and thin stainless-steel tube to maximize "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2007.12116","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2020-07-23T16:42:25Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"781f4ebd31306147c53be6e2ed47033813bec79d6260a178aefe8ff6d67902d9","abstract_canon_sha256":"4720b16971d24250b3997249e3e29cc8ec482f9575cf177f473d845d96bd3bff"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:21:43.580982Z","signature_b64":"bAb2FVqIriO/Wyl3KbkD1kHGHx99pEgHDkWx8+vF1g+Jh5+luZ4DKLPSSnydQy0HdieFuqZkXR9JneaQndXtAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"83388fd5818954efd9e87e647a5c5c4389035f9903a72a262d0a64c7563c1356","last_reissued_at":"2026-07-05T01:21:43.580613Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:21:43.580613Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Experimental behaviour of a three-stage metal hydride hydrogen compressor","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"A.R. Galvis, F. Cuevas, F. Leardini, J.F. Fernandez, J.R. Ares","submitted_at":"2020-07-23T16:42:25Z","abstract_excerpt":"A three-stage metal hydride hydrogen compressor (MHHC) system based in AB2-type alloys has been set-up. Every stage can be considered as a Sieverts-type apparatus. The MHHC system can work in the pressure and temperature ranges comprised from vacuum to 250 bar and from RT to 200C, respectively. An efficient thermal management system was set up for the operational ranges of temperature designed. It dumps temperature shifts due to hydrogen expansion during stage coupling and hydrogen absorption/desorption in the alloys. Each reactor consists of a single and thin stainless-steel tube to maximize "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.12116","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/2007.12116/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2007.12116","created_at":"2026-07-05T01:21:43.580672+00:00"},{"alias_kind":"arxiv_version","alias_value":"2007.12116v1","created_at":"2026-07-05T01:21:43.580672+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.12116","created_at":"2026-07-05T01:21:43.580672+00:00"},{"alias_kind":"pith_short_12","alias_value":"QM4I7VMBRFKO","created_at":"2026-07-05T01:21:43.580672+00:00"},{"alias_kind":"pith_short_16","alias_value":"QM4I7VMBRFKO7WPI","created_at":"2026-07-05T01:21:43.580672+00:00"},{"alias_kind":"pith_short_8","alias_value":"QM4I7VMB","created_at":"2026-07-05T01:21:43.580672+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO","json":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO.json","graph_json":"https://pith.science/api/pith-number/QM4I7VMBRFKO7WPIPZSHUXC4IO/graph.json","events_json":"https://pith.science/api/pith-number/QM4I7VMBRFKO7WPIPZSHUXC4IO/events.json","paper":"https://pith.science/paper/QM4I7VMB"},"agent_actions":{"view_html":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO","download_json":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO.json","view_paper":"https://pith.science/paper/QM4I7VMB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2007.12116&json=true","fetch_graph":"https://pith.science/api/pith-number/QM4I7VMBRFKO7WPIPZSHUXC4IO/graph.json","fetch_events":"https://pith.science/api/pith-number/QM4I7VMBRFKO7WPIPZSHUXC4IO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO/action/storage_attestation","attest_author":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO/action/author_attestation","sign_citation":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO/action/citation_signature","submit_replication":"https://pith.science/pith/QM4I7VMBRFKO7WPIPZSHUXC4IO/action/replication_record"}},"created_at":"2026-07-05T01:21:43.580672+00:00","updated_at":"2026-07-05T01:21:43.580672+00:00"}