Results 11 to 20 of about 143,337 (261)
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 +5 more
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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 +3 more
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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 +4 more
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Lomonosov GRB Catalogue: The First Experience of Prompt Emission Multi-Wavelength Observations
Universe, 2021 This paper presents a catalogue of gamma-ray bursts (GRBs) that were detected by the instruments onboard the Lomonosov space observatory. The Lomonosov mission gave the first experience of not only multi-wavelength (from optical to gamma) observations of
V. A. Sadovnichy +13 more
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Multi-wavelength Behaviour of III Zw2 [PDF]
Publications of the Astronomical Society of Australia, 2002 AbstractIII Zw2 was observed with XMM-Newton in July 2000. Its X-ray spectrum can be described by a power law of photon index Γ≈1.7 with a Gaussian line at 6.7 KeV. There is no significant evidence of intrinsic absorption within the source or of a soft X-ray excess.
Salvi, Nikita +4 more
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Multi-Wavelength Spatiotemporal Mode-Locked Fiber Laser at 1.55 μm
Photonics, 2022 We propose and demonstrate an effective and simple multi-wavelength spatiotemporal mode-locked (STML) laser. The laser introduces a multimode interference (MMI) effect using the core diameter mismatch of the fibers, thus enabling simultaneous mode ...
Ze-Long Ma +6 more
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Performance Analysis of Three-Wavelength Multi-Channel Photonic Crystal Filters of Different Sizes
Crystals, 2022 Multi-wavelength and multi-channel photonic crystal filters are designed with different sizes considered by using a two-dimensional quadric lattice photonic crystal structure to solve the problems of a multi-channel filter with structure complexity ...
Wei Liu, Laisheng Zhang, Fan Zhang
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Biosensors, 2022 In this paper, we propose a smartphone-based biosensor for detecting human total hemoglobin concentration in vivo with high accuracy. Compared to the existing biosensors used to measure hemoglobin concentration, the smartphone-based sensor utilizes the ...
Zhipeng Fan +4 more
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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 +2 more
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Multi-Wavelength Study of 4C+28.07 [PDF]
The Astrophysical Journal, 2021 Abstract 4C+28.07 is a γ-ray flat-spectrum-radio-quasar-type source. It is often monitored at different frequencies, though long-term multi-wavelength data of this source have not been modeled in detail before. We have analyzed ∼12 yr (2008 August–2020 May) of Fermi-LAT data with a binning of 10 day timescale and observed three ...
Avik Kumar Das +2 more
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