{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:BRL4Y342I7G76I7IQTQ65WZ27B","short_pith_number":"pith:BRL4Y342","canonical_record":{"source":{"id":"1601.06659","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2016-01-25T16:24:32Z","cross_cats_sorted":["physics.pop-ph","physics.soc-ph"],"title_canon_sha256":"456fdf945deeb620ed5e72f4971159c78ec4a2c90c480c7d6192c9a193759272","abstract_canon_sha256":"dbdf097010875caa09e1415ae5e6e67ff6fbc3a8b675cf2f93b4a1e35c9ceda6"},"schema_version":"1.0"},"canonical_sha256":"0c57cc6f9a47cdff23e884e1eedb3af879ef125b8a08885722741b096a637cd1","source":{"kind":"arxiv","id":"1601.06659","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06659","created_at":"2026-05-18T00:49:19Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06659v2","created_at":"2026-05-18T00:49:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06659","created_at":"2026-05-18T00:49:19Z"},{"alias_kind":"pith_short_12","alias_value":"BRL4Y342I7G7","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"BRL4Y342I7G76I7I","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"BRL4Y342","created_at":"2026-05-18T12:30:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:BRL4Y342I7G76I7IQTQ65WZ27B","target":"record","payload":{"canonical_record":{"source":{"id":"1601.06659","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2016-01-25T16:24:32Z","cross_cats_sorted":["physics.pop-ph","physics.soc-ph"],"title_canon_sha256":"456fdf945deeb620ed5e72f4971159c78ec4a2c90c480c7d6192c9a193759272","abstract_canon_sha256":"dbdf097010875caa09e1415ae5e6e67ff6fbc3a8b675cf2f93b4a1e35c9ceda6"},"schema_version":"1.0"},"canonical_sha256":"0c57cc6f9a47cdff23e884e1eedb3af879ef125b8a08885722741b096a637cd1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:19.245729Z","signature_b64":"ih6LZhPpapKLPwBmPA6v2ZmnfUA3ssTLWtFVER9MrJlh7xnkAj+AtJf85ApArlGWRmSgEbtYnHtmA1f7HSxqAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0c57cc6f9a47cdff23e884e1eedb3af879ef125b8a08885722741b096a637cd1","last_reissued_at":"2026-05-18T00:49:19.245193Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:19.245193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.06659","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:49:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7z4Xb7R6aDMKIKePNRy7v6KdTqrd9XIma7O5HqPO2gTPgqXiCGOYp6XD0/ofohHyRcsZA9M4cHnhDBD7oBuaCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:20:09.490297Z"},"content_sha256":"a456682924ce6242f5a497134c214ad11fbf6bbfa620ab041255790177c53878","schema_version":"1.0","event_id":"sha256:a456682924ce6242f5a497134c214ad11fbf6bbfa620ab041255790177c53878"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:BRL4Y342I7G76I7IQTQ65WZ27B","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Project-based physics labs using low-cost open-source hardware","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.pop-ph","physics.soc-ph"],"primary_cat":"physics.ed-ph","authors_text":"F. Bouquet, J. Bobroff, L. Maurines, M. Fuchs-Gallezot","submitted_at":"2016-01-25T16:24:32Z","abstract_excerpt":"We describe a project-based physics lab, which we proposed to third-year university students. Theses labs are based on new open-source low-cost equipment (Arduino microcontrollers and compatible sensors). Students are given complete autonomy: they develop their own experimental setup and study the physics topic of their choice. The goal of these projects is to let students discover the reality of experimental physics. Technical specifications of the acquisition material and case studies are presented for practical implementation in other universities."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06659","kind":"arxiv","version":2},"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":"2026-05-18T00:49:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"driFHXGk9FX82J4Y+jYSUX0dLlu1NPGFgq6uNL8g5w438cOxjjdmnuAkDc2TUpJ4GI7wYFFplrgtHhae36pZCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T01:20:09.490663Z"},"content_sha256":"f850734bcfe363843b4c39fd12974040a4cc1cbefb67c7bc7f14c7da4f767995","schema_version":"1.0","event_id":"sha256:f850734bcfe363843b4c39fd12974040a4cc1cbefb67c7bc7f14c7da4f767995"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BRL4Y342I7G76I7IQTQ65WZ27B/bundle.json","state_url":"https://pith.science/pith/BRL4Y342I7G76I7IQTQ65WZ27B/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BRL4Y342I7G76I7IQTQ65WZ27B/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":"2026-06-03T01:20:09Z","links":{"resolver":"https://pith.science/pith/BRL4Y342I7G76I7IQTQ65WZ27B","bundle":"https://pith.science/pith/BRL4Y342I7G76I7IQTQ65WZ27B/bundle.json","state":"https://pith.science/pith/BRL4Y342I7G76I7IQTQ65WZ27B/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BRL4Y342I7G76I7IQTQ65WZ27B/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:BRL4Y342I7G76I7IQTQ65WZ27B","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":"dbdf097010875caa09e1415ae5e6e67ff6fbc3a8b675cf2f93b4a1e35c9ceda6","cross_cats_sorted":["physics.pop-ph","physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2016-01-25T16:24:32Z","title_canon_sha256":"456fdf945deeb620ed5e72f4971159c78ec4a2c90c480c7d6192c9a193759272"},"schema_version":"1.0","source":{"id":"1601.06659","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06659","created_at":"2026-05-18T00:49:19Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06659v2","created_at":"2026-05-18T00:49:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06659","created_at":"2026-05-18T00:49:19Z"},{"alias_kind":"pith_short_12","alias_value":"BRL4Y342I7G7","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"BRL4Y342I7G76I7I","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"BRL4Y342","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:f850734bcfe363843b4c39fd12974040a4cc1cbefb67c7bc7f14c7da4f767995","target":"graph","created_at":"2026-05-18T00:49:19Z","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 describe a project-based physics lab, which we proposed to third-year university students. Theses labs are based on new open-source low-cost equipment (Arduino microcontrollers and compatible sensors). Students are given complete autonomy: they develop their own experimental setup and study the physics topic of their choice. The goal of these projects is to let students discover the reality of experimental physics. Technical specifications of the acquisition material and case studies are presented for practical implementation in other universities.","authors_text":"F. Bouquet, J. Bobroff, L. Maurines, M. Fuchs-Gallezot","cross_cats":["physics.pop-ph","physics.soc-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2016-01-25T16:24:32Z","title":"Project-based physics labs using low-cost open-source hardware"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06659","kind":"arxiv","version":2},"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:a456682924ce6242f5a497134c214ad11fbf6bbfa620ab041255790177c53878","target":"record","created_at":"2026-05-18T00:49:19Z","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":"dbdf097010875caa09e1415ae5e6e67ff6fbc3a8b675cf2f93b4a1e35c9ceda6","cross_cats_sorted":["physics.pop-ph","physics.soc-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ed-ph","submitted_at":"2016-01-25T16:24:32Z","title_canon_sha256":"456fdf945deeb620ed5e72f4971159c78ec4a2c90c480c7d6192c9a193759272"},"schema_version":"1.0","source":{"id":"1601.06659","kind":"arxiv","version":2}},"canonical_sha256":"0c57cc6f9a47cdff23e884e1eedb3af879ef125b8a08885722741b096a637cd1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c57cc6f9a47cdff23e884e1eedb3af879ef125b8a08885722741b096a637cd1","first_computed_at":"2026-05-18T00:49:19.245193Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:19.245193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ih6LZhPpapKLPwBmPA6v2ZmnfUA3ssTLWtFVER9MrJlh7xnkAj+AtJf85ApArlGWRmSgEbtYnHtmA1f7HSxqAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:19.245729Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06659","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a456682924ce6242f5a497134c214ad11fbf6bbfa620ab041255790177c53878","sha256:f850734bcfe363843b4c39fd12974040a4cc1cbefb67c7bc7f14c7da4f767995"],"state_sha256":"8fd5988bfadb7d0cd35284ce9cd4d457c8323902fe96fd08d3ec8fe3927b8546"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bQ8pPN7OUhSMWpW7JNDoe9d2612yHdWorPkDxMrLx2dZbu87Qt3OuhL0u6KAnPfl+CSfQ6hkWFeKF/6rPw1tBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T01:20:09.492657Z","bundle_sha256":"b8958a483e3d8183d544c5995be07cebb2d48616dd07acc036e766a4bc10d25d"}}