# Distinction of Patterns within Time-Series Data Using Constellation Graphs

### Mayumi Oyama-Higa, Michihiko Setogawa, Teijun Miao

#### 2005

#### Abstract

Constellation graphs for time-series data are very effective tool for displaying a physio-psychological index. In this study, we recorded fingertip pulse waves of elderly subjects, carried out chaos analysis on the plethysmogram data thus obtained, and examined their relationship with dementia. We discovered the Lyapunov exponent of the time series had a clear relationship with the severity of dementia and the communication skill of the elderly subjects. We could clearly demonstrate a relationship between dementia and the Lyapunov exponents using constellation graphs of the time series data.

#### References

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#### Paper Citation

#### in Harvard Style

Oyama-Higa M., Setogawa M. and Miao T. (2005). **Distinction of Patterns within Time-Series Data Using Constellation Graphs** . In *Proceedings of the 5th International Workshop on Pattern Recognition in Information Systems - Volume 1: PRIS, (ICEIS 2005)* ISBN 972-8865-28-7, pages 192-197. DOI: 10.5220/0002559301920197

#### in Bibtex Style

@conference{pris05,

author={Mayumi Oyama-Higa and Michihiko Setogawa and Teijun Miao},

title={Distinction of Patterns within Time-Series Data Using Constellation Graphs},

booktitle={Proceedings of the 5th International Workshop on Pattern Recognition in Information Systems - Volume 1: PRIS, (ICEIS 2005)},

year={2005},

pages={192-197},

publisher={SciTePress},

organization={INSTICC},

doi={10.5220/0002559301920197},

isbn={972-8865-28-7},

}

#### in EndNote Style

TY - CONF

JO - Proceedings of the 5th International Workshop on Pattern Recognition in Information Systems - Volume 1: PRIS, (ICEIS 2005)

TI - Distinction of Patterns within Time-Series Data Using Constellation Graphs

SN - 972-8865-28-7

AU - Oyama-Higa M.

AU - Setogawa M.

AU - Miao T.

PY - 2005

SP - 192

EP - 197

DO - 10.5220/0002559301920197