Pith Number

pith:QTK347I3

pith:2018:QTK347I37I6EQMIJIZRCH4PQGO

not attested not anchored not stored refs pending

Data-driven Air Quality Characterisation for Urban Environments: a Case Study

Charith Perera, Gideon Ewa, Klaus Moessner, Suparna De, Yuchao Zhou

arxiv:1901.06242 v1 · 2018-12-01 · cs.CY · stat.AP · stat.ML

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QTK347I37I6EQMIJIZRCH4PQGO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:56:01.659175Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

84d5be7d1bfa3c483109466223f1f033a35a22151de299680ea9b722e6433453

Aliases

arxiv: 1901.06242 · arxiv_version: 1901.06242v1 · doi: 10.48550/arxiv.1901.06242 · pith_short_12: QTK347I37I6E · pith_short_16: QTK347I37I6EQMIJ · pith_short_8: QTK347I3

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QTK347I37I6EQMIJIZRCH4PQGO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 84d5be7d1bfa3c483109466223f1f033a35a22151de299680ea9b722e6433453

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "788c3403e3d432755cb6cb6b86cf3d89feda7221ef8052a2f235e7b2d85a5db8",
    "cross_cats_sorted": [
      "stat.AP",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2018-12-01T13:40:03Z",
    "title_canon_sha256": "bf734a86b89b2285b47d47f8c9b3be396784ccd5c25e561c750ec55069702a44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.06242",
    "kind": "arxiv",
    "version": 1
  }
}