The chaos and comolex svstem in medicine

Maniwa, Yoshio; Amata, Mitsuyuki; Uchida, Ichirō; Ota, Shoichi; Nunokawa, Toshie

doi:10.3156/jsoft.15.635

Cited by 3 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PPG data were collected at a sampling rate of 200 Hz and the duration of each recording was 20 seconds. The PPG recordings of 20 seconds are intentionally much shorter than is usual for ECG recordings to exclude motion artefacts and other noise [ 10 ]. This also serves as a preliminary test of feasibility, where the ease of shorter recording lengths is desirable in a clinical setting.…”

Section: Methodsmentioning

confidence: 99%

Detection of a and b waves in the acceleration photoplethysmogram

et al. 2014

View full text Add to dashboard Cite

BackgroundAnalyzing acceleration photoplethysmogram (APG) signals measured after exercise is challenging. In this paper, a novel algorithm that can detect a waves and consequently b waves under these conditions is proposed. Accurate a and b wave detection is an important first step for the assessment of arterial stiffness and other cardiovascular parameters.MethodsNine algorithms based on fixed thresholding are compared, and a new algorithm is introduced to improve the detection rate using a testing set of heat stressed APG signals containing a total of 1,540 heart beats.ResultsThe new a detection algorithm demonstrates the highest overall detection accuracy—99.78% sensitivity, 100% positive predictivity—over signals that suffer from 1) non-stationary effects, 2) irregular heartbeats, and 3) low amplitude waves. In addition, the proposed b detection algorithm achieved an overall sensitivity of 99.78% and a positive predictivity of 99.95%.ConclusionsThe proposed algorithm presents an advantage for real-time applications by avoiding human intervention in threshold determination.

show abstract

Section: Methodsmentioning

confidence: 99%

Detection of a and b waves in the acceleration photoplethysmogram

et al. 2014

View full text Add to dashboard Cite

show abstract

Noninvasive biological sensor system for detection of drunk driving

Kojima¹,

Maeda²,

Ogura³

et al. 2009

2009 9th International Conference on Information Technology and Applications in Biomedicine

View full text Add to dashboard Cite

Subjective Experiment for the Effect of Thermal Environment and Ventilation Rate on Productivity

Haneda¹,

Nishihara²,

Tanabe³

2009

Nihon Kenchiku Gakkai Kankyokei Ronbunshu

View full text Add to dashboard Cite

To investigate the effect of thermal environment and the ventilation rate on productivity, a subjective experiment was conducted. The conditions were the combination of thermal environment : operative temperature of 25.5 and 28.5 ; and the ventilation rate : 11m 3 /(h p) and 90m 3 /(h p). Eleven subjects participated in a 350min exposure and worked on three-digit multiplication tasks for 180min. The percentage of dissatisfied with air quality was higher in the higher temperatures and in the lower ventilation rates. The performance of the task was not significantly different among the conditions. The increase of the level of fatigue was more in the higher temperature condition. Correlation between the percentage of dissatisfied derived from perceived air quality and the fatigue level was obtained. The relationships of the task performance and the satisfaction vote of the indoor environment and the level of fatigue were obtained. 2005 2 1990 6 18 2005 1990 45 2005 COOL BIZ COOL BIZ Output Input Input Output COOL BIZ Seppänen Wargocki 10 1.1 Tham 22.5 24.5 COOL BIZ 74 638 507-515 2009

show abstract

The chaos and comolex svstem in medicine

Cited by 3 publications

References 2 publications

Detection of a and b waves in the acceleration photoplethysmogram

Detection of a and b waves in the acceleration photoplethysmogram

Noninvasive biological sensor system for detection of drunk driving

Subjective Experiment for the Effect of Thermal Environment and Ventilation Rate on Productivity

Contact Info

Product

Resources

About