A computer method for biorhythm evaluation and analysis

Chou, B. J.; Besch, E. L.

doi:10.1080/09291017409359417

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…3) according to the method of Chou and Besch (1974). From these periodgrams it is apparent that period length of body temperature cycles was 24 hr at ambient temperatures of 23, 26, and 38 C; 23 hr at 29 and 35 C; and 25 hr at 32 C. These data are similar to those reported by Winget et al (1965) who showed that the period length for body temperature was 24 hr in a male chicken, but 28 hr in the female.…”

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confidence: 89%

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Telemetry Measured Body Temperature of Domestic Fowl at Various Ambient Temperatures

Kadono

Besch

1978

Poultry Science

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Adult, male Single Comb White Leghorn chickens (SCWL) were housed unrestrained in individual cages in a controlled environment room with a photoperiod of 12L:12D. By means of surgically implanted radio transmitter, body temperatures were recorded hourly for five consecutive days at each of six experimental temperatures: 23, 26, 29, 32, 35, and 38 C. The data were evaluated statistically by correlogram, periodogram, and harmonic analysis. Period length of each cycle was about 24 hr at all ambient temperatures. No significant differences in deep body temperature were observed until the ambient temperature reached 32 C; but highly significant increases were detected between 32, 35, and 38 C. Diurnal differences in body temperature ranged from .6 to 1.1 C. It has been suggested that the body temperature of male chicken may be under the control of a biological clock that synchronizes with the solar day.

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confidence: 89%

“…Amplitude, phase, and shape of the body temperature biorhythms were calculated by the technique of Chou and Besch (1974). The periodic curve resulting from the harmonic analysis is compared to observed body temperature data for the 23 C ambient condition (Fig.…”

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confidence: 99%

Telemetry Measured Body Temperature of Domestic Fowl at Various Ambient Temperatures

Kadono

Besch

1978

Poultry Science

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“…Other variants, such as population mean-cosinor, group mean-cosinor, multi-cosinor and non-linear cosinor methods, are similarly based on various compound models. 24 The multivariate method 21 and spectral analysis method 7 have also been developed to evaluate and analyze biorhythms regarding their general characteristics in terms of amplitude, phase, periodical frequency, and cyclic length.…”

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confidence: 99%

Estimation of the Biphasic Property in a Female’s Menstrual Cycle from Cutaneous Temperature Measured During Sleep

Chen

Kitazawa²,

Togawa

2009

Ann Biomed Eng

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This paper proposes a method to estimate a woman's menstrual cycle based on the hidden Markov model (HMM). A tiny device was developed that attaches around the abdominal region to measure cutaneous temperature at 10-min intervals during sleep. The measured temperature data were encoded as a two-dimensional image (QR code, i.e., quick response code) and displayed in the LCD window of the device. A mobile phone captured the QR code image, decoded the information and transmitted the data to a database server. The collected data were analyzed by three steps to estimate the biphasic temperature property in a menstrual cycle. The key step was an HMM-based step between preprocessing and postprocessing. A discrete Markov model, with two hidden phases, was assumed to represent higher- and lower-temperature phases during a menstrual cycle. The proposed method was verified by the data collected from 30 female participants, aged from 14 to 46, over six consecutive months. By comparing the estimated results with individual records from the participants, 71.6% of 190 menstrual cycles were correctly estimated. The sensitivity and positive predictability were 91.8 and 96.6%, respectively. This objective evaluation provides a promising approach for managing premenstrual syndrome and birth control.

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Shifting phase analysis correlation in the determination of reproducibility of biological rhythms. its use in the study of patterns of rabbit and rat feeding

Horton

West

1977

Journal of Interdisciplinary Cycle Research

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A computer method for biorhythm evaluation and analysis

Cited by 4 publications

References 6 publications

Telemetry Measured Body Temperature of Domestic Fowl at Various Ambient Temperatures

Telemetry Measured Body Temperature of Domestic Fowl at Various Ambient Temperatures

Estimation of the Biphasic Property in a Female’s Menstrual Cycle from Cutaneous Temperature Measured During Sleep

Shifting phase analysis correlation in the determination of reproducibility of biological rhythms. its use in the study of patterns of rabbit and rat feeding

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