Pith Number

pith:4TFP5AK6

pith:2018:4TFP5AK6TP3744EWVOZBVGNGXB

not attested not anchored not stored refs pending

SPECMAR: Fast Heart Rate Estimation from PPG Signal using a Modified Spectral Subtraction Scheme with Composite Motion Artifacts Reference Generation

Celia Shahnaz, Mohammad Tariqul Islam, Shaikh Anowarul Fattah, Sk. Tanvir Ahmed

arxiv:1810.06196 v2 · 2018-10-15 · eess.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4TFP5AK6TP3744EWVOZBVGNGXB}

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	2026-05-17T23:59:49.022935Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4cafe815e9bf7fe7096abb21a99a6b8723cc05615fbafff4311a4e0c3d3a2aa

Aliases

arxiv: 1810.06196 · arxiv_version: 1810.06196v2 · doi: 10.48550/arxiv.1810.06196 · pith_short_12: 4TFP5AK6TP37 · pith_short_16: 4TFP5AK6TP3744EW · pith_short_8: 4TFP5AK6

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/4TFP5AK6TP3744EWVOZBVGNGXB \
  | 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: e4cafe815e9bf7fe7096abb21a99a6b8723cc05615fbafff4311a4e0c3d3a2aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9d827676da3a9caeee086ce5e040b76024b4f4a35b386ee2a157e95d52497f7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2018-10-15T06:35:12Z",
    "title_canon_sha256": "c4d605ec5bce10b3b63df27c5a42fb70f1938762c50e621cf8fef0b646643668"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.06196",
    "kind": "arxiv",
    "version": 2
  }
}