Results 11 to 20 of about 2,621,724 (309)

Recognition of the finger vascular system using multi‐wavelength imaging

IET Biometrics, 2022
There has recently been intensive development of methods for identification and personal verification using the human finger vascular system (FVS). The primary focus of these efforts has been the increasingly sophisticated methods of image processing ...
Tomasz Moroń, Krzysztof Bernacki, Jerzy Fiołka, Jia Peng, Adam Popowicz   +4 more
doaj   +1 more source

Multi-Wavelength Variability [PDF]

Space Science Reviews, 2014
Accepted for publication in Space Science Reviews. Also appeared in hard cover in the Space Sciences Series of ISSI "The Physics of Accretion onto Black Holes" (Springer Publisher)
Phil Uttley, Piergiorgio Casella
openaire   +5 more sources

Astro-COLIBRI 2—An Advanced Platform for Real-Time Multi-Messenger Discoveries

Galaxies, 2023
The study of flaring astrophysical events in the multi-messenger approach requires instantaneous follow-up observations to better understand the nature of these events through complementary observational data.
Patrick Reichherzer, Fabian Schüssler, Valentin Lefranc, Julia Becker Tjus, Jayson Mourier, Atilla Kaan Alkan   +5 more
doaj   +1 more source

Relativistic Effects of Rotation in γ-ray Pulsars—Invited Review

Galaxies, 2021
In this paper, we consider the relativistic effects of rotation in the magnetospheres of γ-ray pulsars. The paper reviews the progress achieved in this field during the last three decades.
Zaza Osmanov
doaj   +1 more source

PPG EduKit: An Adjustable Photoplethysmography Evaluation System for Educational Activities

Sensors, 2022
The grown interest in healthcare applications has made biomedical engineering one of the fastest growing disciplines in recent years. Photoplethysmography (PPG) has gained popularity in recent years due to its versatility for noninvasive monitoring of ...
Ángel Solé Morillo, Joan Lambert Cause, Vlad-Eusebiu Baciu, Bruno da Silva, Juan C. Garcia-Naranjo, Johan Stiens   +5 more
doaj   +1 more source

Coordinated multi-wavelength observations of Sgr A* [PDF]

Journal of Physics: Conference Series, 2008
15 pages, 7 figures, contribution for the conference "The Universe under the Microscope" (AHAR 2008), to be published in Journal of Physics: Conference Series by Institute of Physics ...
Eckart, A., Schödel, R., Baganoff, F. K., Morris, M., Bertram, T., Dovciak, M., Dowries, D., Duschl, W. J., Karas, V., König, S., Krichbaum, T., Krips, M., Kunneriath, D., Lu, R.-S., Markoff, S., Mauerhan, J., Meyer, L., Moultaka, J., Muzic, K., Najarro, F., Schuster, K., Sjouwerman, L., Straubmeier, C., Thum, C., Vogel, S., Wiesemeyer, Helmut, Witzel, G., Zamaninasab, M., Zensus, A.   +28 more
openaire   +6 more sources

Optical Property of Polarization-Maintaining Fiber Taper for Tunable Multi-Wavelength Fiber Laser Generation

IEEE Photonics Journal, 2020
We investigate optical property of polarization-maintaining fiber taper (PMFT) for tunable multi-wavelength laser generation in a fiber ring cavity. A panda-type polarization fiber is fused and tapered into a fiber taper with a diameter of about 2.5 ...
Feng Yuan, Jinjin Zhao, Weifeng Jiang, Hongdan Wan   +3 more
doaj   +1 more source

Novel Multi-Parametric Sensor System for Comprehensive Multi-Wavelength Photoplethysmography Characterization

Sensors, 2023
Photoplethysmography (PPG) is widely used to assess cardiovascular health. However, its usage and standardization are limited by the impact of variable contact force and temperature, which influence the accuracy and reliability of the measurements ...
Joan Lambert Cause, Ángel Solé Morillo, Bruno da Silva, Juan C. García-Naranjo, Johan Stiens   +4 more
doaj   +1 more source

Research on Multiple Spectral Ranges with Deep Learning for SpO₂ Measurement

Sensors, 2022
Oxyhemoglobin saturation by pulse oximetry (SpO2) has always played an important role in the diagnosis of symptoms. Considering that the traditional SpO2 measurement has a certain error due to the number of wavelengths and the algorithm and the wider ...
Chih-Hsiung Shen, Wei-Lun Chen, Jung-Jie Wu   +2 more
doaj   +1 more source

Wearable Wrist Photoplethysmography for Optimal Monitoring of Vital Signs: A Unified Perspective on Pulse Waveforms

IEEE Photonics Journal, 2022
To track vital signs on the wrist, a wearable system, named WrisTee, has been developed for remote health monitoring. Using three optical sensors with four light sources, WrisTee allows users to measure 12 photoplethysmogram (PPG) signals at three ...
Nguyen Mai Hoang Long, Wan-Young Chung
doaj   +1 more source