{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:NMO4H46CXWHUVK7EEPVI64GSS4","short_pith_number":"pith:NMO4H46C","canonical_record":{"source":{"id":"1806.07055","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-06-19T06:00:46Z","cross_cats_sorted":["cs.ET","cs.NI"],"title_canon_sha256":"de8480d5128753547772bc16f44cfec4859bccb00cdc3f12d0722a6e2d7ffbef","abstract_canon_sha256":"8da2c38ecff586330289c2dace891cbe302f0cd3c80e592ab2c048227f6bcb69"},"schema_version":"1.0"},"canonical_sha256":"6b1dc3f3c2bd8f4aabe423ea8f70d2973682058d4a18ab77d86d7aa99398a3ce","source":{"kind":"arxiv","id":"1806.07055","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.07055","created_at":"2026-05-18T00:12:57Z"},{"alias_kind":"arxiv_version","alias_value":"1806.07055v1","created_at":"2026-05-18T00:12:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.07055","created_at":"2026-05-18T00:12:57Z"},{"alias_kind":"pith_short_12","alias_value":"NMO4H46CXWHU","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NMO4H46CXWHUVK7E","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NMO4H46C","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:NMO4H46CXWHUVK7EEPVI64GSS4","target":"record","payload":{"canonical_record":{"source":{"id":"1806.07055","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-06-19T06:00:46Z","cross_cats_sorted":["cs.ET","cs.NI"],"title_canon_sha256":"de8480d5128753547772bc16f44cfec4859bccb00cdc3f12d0722a6e2d7ffbef","abstract_canon_sha256":"8da2c38ecff586330289c2dace891cbe302f0cd3c80e592ab2c048227f6bcb69"},"schema_version":"1.0"},"canonical_sha256":"6b1dc3f3c2bd8f4aabe423ea8f70d2973682058d4a18ab77d86d7aa99398a3ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:12:57.570182Z","signature_b64":"wboAJSxOXSfy4az+AMiQcAywgtfwrBlKO5Wr3hyQcSsEWVNsXSXWRxgm1Poa8sOhL+TK3LroYlg04UkQmnPjDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6b1dc3f3c2bd8f4aabe423ea8f70d2973682058d4a18ab77d86d7aa99398a3ce","last_reissued_at":"2026-05-18T00:12:57.569530Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:12:57.569530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.07055","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":"2026-05-18T00:12:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pln8LRocqbKQmDOOWW9GVdgKWi84TdU+sA9t5z27NN+WycFwL9s77DwJAihsQCdrnoHKkLBSi19Tm00TCzHWCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:21:08.230506Z"},"content_sha256":"4ea5c2722ad1476f627527fb18d6f29de2e63e65ed6575467135fa6916c1a6ff","schema_version":"1.0","event_id":"sha256:4ea5c2722ad1476f627527fb18d6f29de2e63e65ed6575467135fa6916c1a6ff"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:NMO4H46CXWHUVK7EEPVI64GSS4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Capacitor Based Activity Sensing for Kinetic Powered Wearable IoTs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.ET","cs.NI"],"primary_cat":"cs.HC","authors_text":"Dong Ma, Guohao Lan, Mahbub Hassan, Weitao Xu, Wen Hu","submitted_at":"2018-06-19T06:00:46Z","abstract_excerpt":"We propose a novel use of the conventional energy storage component, i.e., capacitor, in kinetic-powered wearable IoTs as a sensor to detect human activities. Since different activities accumulate energies in the capacitor at different rates, these activities can be detected directly by observing the charging rate of the capacitor. The key advantage of the proposed capacitor based activity sensing mechanism, called CapSense, is that it obviates the need for sampling the motion signal during the activity detection period thus significantly saving power consumption of the wearable device. A chal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.07055","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":"2026-05-18T00:12:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RnGUFoJ1ATBqA6hO45i4ZWjtNsU5wSiFNfIJQnmCTFEH3lelh+LHKMc4k7S9WIKTfidVUF9bS0MualFeQpNGDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:21:08.230891Z"},"content_sha256":"4583848e85f465747f7fd18eb30a5c27f9082ada486eba3a72de37a9dfb0465a","schema_version":"1.0","event_id":"sha256:4583848e85f465747f7fd18eb30a5c27f9082ada486eba3a72de37a9dfb0465a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NMO4H46CXWHUVK7EEPVI64GSS4/bundle.json","state_url":"https://pith.science/pith/NMO4H46CXWHUVK7EEPVI64GSS4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NMO4H46CXWHUVK7EEPVI64GSS4/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":"2026-06-01T16:21:08Z","links":{"resolver":"https://pith.science/pith/NMO4H46CXWHUVK7EEPVI64GSS4","bundle":"https://pith.science/pith/NMO4H46CXWHUVK7EEPVI64GSS4/bundle.json","state":"https://pith.science/pith/NMO4H46CXWHUVK7EEPVI64GSS4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NMO4H46CXWHUVK7EEPVI64GSS4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NMO4H46CXWHUVK7EEPVI64GSS4","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":"8da2c38ecff586330289c2dace891cbe302f0cd3c80e592ab2c048227f6bcb69","cross_cats_sorted":["cs.ET","cs.NI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-06-19T06:00:46Z","title_canon_sha256":"de8480d5128753547772bc16f44cfec4859bccb00cdc3f12d0722a6e2d7ffbef"},"schema_version":"1.0","source":{"id":"1806.07055","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.07055","created_at":"2026-05-18T00:12:57Z"},{"alias_kind":"arxiv_version","alias_value":"1806.07055v1","created_at":"2026-05-18T00:12:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.07055","created_at":"2026-05-18T00:12:57Z"},{"alias_kind":"pith_short_12","alias_value":"NMO4H46CXWHU","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NMO4H46CXWHUVK7E","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NMO4H46C","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:4583848e85f465747f7fd18eb30a5c27f9082ada486eba3a72de37a9dfb0465a","target":"graph","created_at":"2026-05-18T00:12:57Z","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 propose a novel use of the conventional energy storage component, i.e., capacitor, in kinetic-powered wearable IoTs as a sensor to detect human activities. Since different activities accumulate energies in the capacitor at different rates, these activities can be detected directly by observing the charging rate of the capacitor. The key advantage of the proposed capacitor based activity sensing mechanism, called CapSense, is that it obviates the need for sampling the motion signal during the activity detection period thus significantly saving power consumption of the wearable device. A chal","authors_text":"Dong Ma, Guohao Lan, Mahbub Hassan, Weitao Xu, Wen Hu","cross_cats":["cs.ET","cs.NI"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-06-19T06:00:46Z","title":"Capacitor Based Activity Sensing for Kinetic Powered Wearable IoTs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.07055","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":"sha256:4ea5c2722ad1476f627527fb18d6f29de2e63e65ed6575467135fa6916c1a6ff","target":"record","created_at":"2026-05-18T00:12:57Z","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":"8da2c38ecff586330289c2dace891cbe302f0cd3c80e592ab2c048227f6bcb69","cross_cats_sorted":["cs.ET","cs.NI"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.HC","submitted_at":"2018-06-19T06:00:46Z","title_canon_sha256":"de8480d5128753547772bc16f44cfec4859bccb00cdc3f12d0722a6e2d7ffbef"},"schema_version":"1.0","source":{"id":"1806.07055","kind":"arxiv","version":1}},"canonical_sha256":"6b1dc3f3c2bd8f4aabe423ea8f70d2973682058d4a18ab77d86d7aa99398a3ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6b1dc3f3c2bd8f4aabe423ea8f70d2973682058d4a18ab77d86d7aa99398a3ce","first_computed_at":"2026-05-18T00:12:57.569530Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:12:57.569530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wboAJSxOXSfy4az+AMiQcAywgtfwrBlKO5Wr3hyQcSsEWVNsXSXWRxgm1Poa8sOhL+TK3LroYlg04UkQmnPjDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:12:57.570182Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.07055","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4ea5c2722ad1476f627527fb18d6f29de2e63e65ed6575467135fa6916c1a6ff","sha256:4583848e85f465747f7fd18eb30a5c27f9082ada486eba3a72de37a9dfb0465a"],"state_sha256":"2d2c818114eb7343e38f5096a74bec2d8271e85d46e2ec6a401372ceea67ff6d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fWeJ0mtuZYevvUDAAzNEwkGGk8aQZjgbvJrbG7Kvt72A2BKFoGmH5koClBrctvkC5sqV5RmTsx823K+pZbqJBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T16:21:08.232921Z","bundle_sha256":"a3d93c2612f4107ef6f9bf60dad8a85a8e9f5e583d95989bc14a2c658b954a69"}}