{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:PKKT77FHNOVAD77QY7CYRILCUE","short_pith_number":"pith:PKKT77FH","canonical_record":{"source":{"id":"2104.14418","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2021-04-29T15:31:56Z","cross_cats_sorted":[],"title_canon_sha256":"0dd4cb6ce85533326a30810565ba6e3649d51b9695f92c319fa32988bab9c611","abstract_canon_sha256":"f088ef6442406e7f30a2f5d863817996645649d73f1812a6c177a1f4cc3e6da9"},"schema_version":"1.0"},"canonical_sha256":"7a953ffca76baa01fff0c7c588a162a1314e56f087c414937051daf57adbb680","source":{"kind":"arxiv","id":"2104.14418","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.14418","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"arxiv_version","alias_value":"2104.14418v1","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.14418","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"pith_short_12","alias_value":"PKKT77FHNOVA","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"pith_short_16","alias_value":"PKKT77FHNOVAD77Q","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"pith_short_8","alias_value":"PKKT77FH","created_at":"2026-07-05T02:36:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:PKKT77FHNOVAD77QY7CYRILCUE","target":"record","payload":{"canonical_record":{"source":{"id":"2104.14418","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2021-04-29T15:31:56Z","cross_cats_sorted":[],"title_canon_sha256":"0dd4cb6ce85533326a30810565ba6e3649d51b9695f92c319fa32988bab9c611","abstract_canon_sha256":"f088ef6442406e7f30a2f5d863817996645649d73f1812a6c177a1f4cc3e6da9"},"schema_version":"1.0"},"canonical_sha256":"7a953ffca76baa01fff0c7c588a162a1314e56f087c414937051daf57adbb680","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:36:16.459067Z","signature_b64":"SlFaJzlgFojjL9O8H5iQNctDVvQhUhX3S0Fm6VxhAi2LcXESvqjhOJVeph3Zd/nGCzMHaWNjbEdvYtCWC479CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a953ffca76baa01fff0c7c588a162a1314e56f087c414937051daf57adbb680","last_reissued_at":"2026-07-05T02:36:16.458671Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:36:16.458671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2104.14418","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":"2026-07-05T02:36:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"npbnB6fLDkvkwS4/NpXv1kaRrEbVlqD/k3jq1dD1yV5UbCX4858cm4KNE8X2ojnGnTnul5QxQ4Ei2PhGSLZLAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-16T05:48:01.096287Z"},"content_sha256":"f53024739679e943f63839bf76b10c24f6667f855cedfd810f35785d7bef0b61","schema_version":"1.0","event_id":"sha256:f53024739679e943f63839bf76b10c24f6667f855cedfd810f35785d7bef0b61"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:PKKT77FHNOVAD77QY7CYRILCUE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhancing Safety of Students with Mobile Air Filtration during School Reopening from COVID-19","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.RO","authors_text":"Abigayle E. Moser, Ali Doosttalab, Antonio Esquivel-Puentes, Haoguang Yang, Jhon J. Qui\\~nones, Luciano Castillo, Mythra V. Balakuntala, Nina Mahmoudian, Richard M. Voyles, Tanya Purwar","submitted_at":"2021-04-29T15:31:56Z","abstract_excerpt":"The paper discusses how robots enable occupant-safe continuous protection for students when schools reopen. Conventionally, fixed air filters are not used as a key pandemic prevention method for public indoor spaces because they are unable to trap the airborne pathogens in time in the entire room. However, by combining the mobility of a robot with air filtration, the efficacy of cleaning up the air around multiple people is largely increased. A disinfection co-robot prototype is thus developed to provide continuous and occupant-friendly protection to people gathering indoors, specifically for "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.14418","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/2104.14418/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:36:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LozsEz8ce243oBi0cPWzrPmbWAY5ca0U43UcVis2m0l+RVuzi9LK6E3pod3rZB93errb4LQmSfampuaj9kwBCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-16T05:48:01.096689Z"},"content_sha256":"ecaf0d968c083cbd74e8cec2df6f22ec189ae4526520ff95ab61d0adfe862161","schema_version":"1.0","event_id":"sha256:ecaf0d968c083cbd74e8cec2df6f22ec189ae4526520ff95ab61d0adfe862161"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PKKT77FHNOVAD77QY7CYRILCUE/bundle.json","state_url":"https://pith.science/pith/PKKT77FHNOVAD77QY7CYRILCUE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PKKT77FHNOVAD77QY7CYRILCUE/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":"2026-07-16T05:48:01Z","links":{"resolver":"https://pith.science/pith/PKKT77FHNOVAD77QY7CYRILCUE","bundle":"https://pith.science/pith/PKKT77FHNOVAD77QY7CYRILCUE/bundle.json","state":"https://pith.science/pith/PKKT77FHNOVAD77QY7CYRILCUE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PKKT77FHNOVAD77QY7CYRILCUE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:PKKT77FHNOVAD77QY7CYRILCUE","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":"f088ef6442406e7f30a2f5d863817996645649d73f1812a6c177a1f4cc3e6da9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2021-04-29T15:31:56Z","title_canon_sha256":"0dd4cb6ce85533326a30810565ba6e3649d51b9695f92c319fa32988bab9c611"},"schema_version":"1.0","source":{"id":"2104.14418","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.14418","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"arxiv_version","alias_value":"2104.14418v1","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.14418","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"pith_short_12","alias_value":"PKKT77FHNOVA","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"pith_short_16","alias_value":"PKKT77FHNOVAD77Q","created_at":"2026-07-05T02:36:16Z"},{"alias_kind":"pith_short_8","alias_value":"PKKT77FH","created_at":"2026-07-05T02:36:16Z"}],"graph_snapshots":[{"event_id":"sha256:ecaf0d968c083cbd74e8cec2df6f22ec189ae4526520ff95ab61d0adfe862161","target":"graph","created_at":"2026-07-05T02:36:16Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.14418/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The paper discusses how robots enable occupant-safe continuous protection for students when schools reopen. Conventionally, fixed air filters are not used as a key pandemic prevention method for public indoor spaces because they are unable to trap the airborne pathogens in time in the entire room. However, by combining the mobility of a robot with air filtration, the efficacy of cleaning up the air around multiple people is largely increased. A disinfection co-robot prototype is thus developed to provide continuous and occupant-friendly protection to people gathering indoors, specifically for ","authors_text":"Abigayle E. Moser, Ali Doosttalab, Antonio Esquivel-Puentes, Haoguang Yang, Jhon J. Qui\\~nones, Luciano Castillo, Mythra V. Balakuntala, Nina Mahmoudian, Richard M. Voyles, Tanya Purwar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2021-04-29T15:31:56Z","title":"Enhancing Safety of Students with Mobile Air Filtration during School Reopening from COVID-19"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.14418","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:f53024739679e943f63839bf76b10c24f6667f855cedfd810f35785d7bef0b61","target":"record","created_at":"2026-07-05T02:36:16Z","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":"f088ef6442406e7f30a2f5d863817996645649d73f1812a6c177a1f4cc3e6da9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.RO","submitted_at":"2021-04-29T15:31:56Z","title_canon_sha256":"0dd4cb6ce85533326a30810565ba6e3649d51b9695f92c319fa32988bab9c611"},"schema_version":"1.0","source":{"id":"2104.14418","kind":"arxiv","version":1}},"canonical_sha256":"7a953ffca76baa01fff0c7c588a162a1314e56f087c414937051daf57adbb680","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a953ffca76baa01fff0c7c588a162a1314e56f087c414937051daf57adbb680","first_computed_at":"2026-07-05T02:36:16.458671Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:36:16.458671Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SlFaJzlgFojjL9O8H5iQNctDVvQhUhX3S0Fm6VxhAi2LcXESvqjhOJVeph3Zd/nGCzMHaWNjbEdvYtCWC479CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:36:16.459067Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.14418","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f53024739679e943f63839bf76b10c24f6667f855cedfd810f35785d7bef0b61","sha256:ecaf0d968c083cbd74e8cec2df6f22ec189ae4526520ff95ab61d0adfe862161"],"state_sha256":"91d937e7358ab4194af2cf316326be7cffceccce34873e6ecde65c92468029f2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tqF7B89bg5SbCWZ7EPJB8lOjmFusTtP3JEeihc/g36BAO80eyYss8aHG0u/zSoGenQB/1pwoDRNBilz/GXbtBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-16T05:48:01.099365Z","bundle_sha256":"adc4a18851437793a117d092b8e20f8e041021630fec7f5ec21bec321c854e59"}}