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Dataset

HAR-CoT

85,482 triaxial accel windows + GPT-4o chain-of-thought (OpenTSLM / TimeNet opentslm/har-cot)

IMUETH PolyboxMIT
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Companion CoT resource from OpenTSLM (arxiv 2510.02410). Authors merged windows from DaLiAc, DOMINO, HHAR, PAMAP2, RealWorld, and Shoaib et al., keeping only activity classes present in all sources: sitting, standing, lying, walking, running, biking, walking upstairs, walking downstairs. Each window is plotted and passed to GPT-4o (gpt-4o-2024-08-06, temperature 0.3, seed 42) with the correct label and one dissimilar label to write a rationale.

License

MIT (OpenTSLM release of windows + rationales; upstream source dataset licences still apply to underlying signals)

At a glance
Type
Dataset
Host
ETH Polybox (opens in a new tab)
DOI
Not reported
Licence
MIT (OpenTSLM release of windows + rationales; upstream source dataset licences still apply to underlying signals) (opens in a new tab)
Access
Not reported
Subjects
Not reported
Signals
IMU
PPG sites
None
Setting
Not reported
Wrist
Yes
Raw waveforms
No
Tasks
Not reported
Updated
Nov 10, 2026
HAR-CoT: ChatPPG research summary card

Key numbers

1
Reference labels
ACTIVITY
50 Hz
Released sampling rate
50 Hz windows × 2.56 s (128 samples/axis); sources resampled into this grid

How it works

How HAR-CoT works: Devices & body sites → Signals recorded → TasksDevices & body sites: None (PPG site). Signals recorded: HAR-CoT, 50 Hz, signals IMU.Devices & body sitesNone: PPG siteNonePPG siteSignals recordedHAR-CoT50 HzxyzIMU

No model in the hub reports results on this dataset yet.

Sampling
50 Hz windows × 2.56 s (128 samples/axis); sources resampled into this grid
Reference labels
activity

Cite

No citation metadata yet.

Cite the ChatPPG record

Cite the dated snapshot 2026-10 for a fixed, reproducible version. Please also cite the original publications listed above.

APA

ChatPPG. (2026). HAR-CoT: dataset record (Version 2026-10) [Data set]. ChatPPG Research Hub. https://chatppg.com/research/datasets/har-cot

BibTeX
@misc{chatppg_dataset_har_cot,
  author       = {{ChatPPG}},
  title        = {{HAR-CoT: dataset record}},
  year         = {2026},
  month        = nov,
  version      = {2026-10},
  howpublished = {\url{https://chatppg.com/research/datasets/har-cot}},
  note         = {ChatPPG Research Hub, Snapshot 2026-10, https://chatppg.com/research/snapshots/2026-10}
}
CITATION.cff
cff-version: 1.2.0
message: "If you use this resource, please cite it as below."
type: dataset
title: "HAR-CoT: dataset record"
authors:
  - name: "ChatPPG"
url: "https://chatppg.com/research/datasets/har-cot"
repository-artifact: "https://chatppg.com/research/snapshots/2026-10"
version: "2026-10"
date-released: "2026-11-10"

History

  1. Record updated

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