نتایج جستجو برای: photoplethysmography

تعداد نتایج: 1059  

Journal: :The Analyst 2014
Yue Zhuo Huan Hu Weili Chen Meng Lu Limei Tian Hojeong Yu Kenneth D Long Edmond Chow William P King Srikanth Singamaneni Brian T Cunningham

We demonstrate a label-free biosensor imaging approach that utilizes a photonic crystal (PC) surface to detect surface attachment of individual dielectric and metal nanoparticles through measurement of localized shifts in the resonant wavelength and resonant reflection magnitude from the PC. Using a microscopy-based approach to scan the PC resonant reflection properties with 0.6 μm spatial reso...

Journal: :Physiological measurement 2010
Boreom Lee Jonghee Han Hyun Jae Baek Jae Hyuk Shin Kwang Suk Park Won Jin Yi

A photoplethysmography (PPG) signal provides very useful information about a subject's hemodynamic status in a hospital or ubiquitous environment. However, PPG is very vulnerable to motion artifacts, which can significantly distort the information belonging to the PPG signal itself. Thus, the reduction of the effects of motion artifacts is an important issue when monitoring the cardiovascular s...

2012
Yee Sin Ang Zhongshui Ma C. Zhang

Electron reflection at an interface is a fundamental quantum transport phenomenon. The most famous electron reflection is the electron→hole Andreev reflection (AR) at a metal/superconductor interface. While AR can be either specular or retro-type, electron→electron reflection is limited to only the specular type. Here we show that electrons can undergo retro-reflection in bilayer graphene (BLG)...

Journal: :Optics express 2008
Krishna Thyagarajan Ritwick Das Olivier Alibart Marc de Micheli Daniel B Ostrowsky Sébastien Tanzilli

In this paper we show that by suitably tailoring the dispersion characteristics of a Bragg reflection waveguide (BRW) mode, it is possible to achieve efficient photon pair generation over a large pump bandwidth while maintaining narrow signal bandwidth. The structure proposed consists of a high index core BRW with a periodically poled GaN core and periodically stratified cladding made up of alt...

2013
Pichitra Uangpairoj Masahiro Shibata

PURPOSE A simple method of estimating arterial elasticity in the human finger using a volume-oscillometric technique with photoplethysmography was principally studied under the various effects of age, sex, and cold-stress stimulation for testing the capability of using this technique in arterial elasticity analysis. METHODS Amplitude variations in the alternating current signal of the photopl...

2004
R. C. Price P. Maillet D. P. Johnson

........................................................................................................................ 5 ACKNOWLEDGEMENTS ....................................................................................................... 6 INTRODUCTION ................................................................................................................... 7 GEOLOGICALSETTING .....

Journal: :Hypertension 2007
Patrick Segers Ernst R Rietzschel Marc L De Buyzere Sebastian J Vermeersch Dirk De Bacquer Luc M Van Bortel Guy De Backer Thierry C Gillebert Pascal R Verdonck

The relation between arterial function indices, such as pulse wave velocity and augmentation index with parameters derived from input impedance analysis, is still incompletely understood. Carotid pressure, central flow waveforms, and pulse wave velocity were noninvasively acquired in 2026 apparently healthy, middle-aged subjects (1052 women and 974 men) 35 to 55 years old at inclusion. Input an...

Journal: :Indian journal of science and technology 2021

Objectives: To facilitate painless and easy method for prediction of diabetes with high accuracy to measure blood glucose by noninvasive using Photoplethysmography (PPG). Method: In this study, is done different machine learning algorithms on a dataset created samples from PIMA Indian Diabetes in vivo dataset. Machine used are Support Vector (SVM), Decision Tree, Naïve Bayes Classifier K Neares...

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