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281
Pulse detection sensor with green light transceiver integrated optoelectronic chip
Published 2023-06-01“…Photo plethysmo graphy (PPG) is widely used to detect heart rate and pulse activity due to its simple design, low cost, and signal cycle that can effectively reflect the heart rhythm.Owing to the partial overlap between the emission and the detection spectra of GaN multiple quantum well (MQW) diode, the MQW receiver can respond to the light emitted from the transmitter sharing identical MQW structures.Thus, the fabricate and characterize monolithic integration of GaN transmitter and receiver was proposed as a single unit onto a conventional GaN-on-sapphire platform.This not only can effectively reduce the size and cost of the device, but also fully improves the sensitivity of the system.The experimental results show that the gallium nitride integrated optoelectronic chip can effectively receive the reflected light modulated by the heart pulse.Combined with circuit processing, the tester’s heart rate and pulse beat frequency can be calculated according to the restored PPG signal, so as to play the role of detection and warning.…”
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282
Advanced Rectifier Technologies for Electrolysis-Based Hydrogen Production: A Comparative Study and Real-World Applications
Published 2024-12-01“…First, the topologies of three rectifiers typically employed in industry—24-pulse thyristor rectifiers, insulated gate bipolar transistor (IGBT) rectifiers, and 24-pulse diode rectifiers with multi-phase choppers—are described in detail. …”
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283
A Simple and Efficient MPPT Method for Low-Power PV Cells
Published 2014-01-01“…Here, we show a generalization of the FOCV method that keeps its inherent simplicity and improves the tracking efficiency. First, a single-diode model for PV cells was used to compute the tracking efficiency versus irradiance. …”
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284
Calculation of Seven Photovoltaic Cells Parameters Using Parallelized Successive Discretization Algorithm
Published 2020-01-01“…The seven parameters of the photovoltaic cell and panels for the two-diode model are determined using a parallelized metaheuristic algorithm based on successive discretization. …”
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285
Effect of Absorption and Scattering on Fluorescence of Buried Tumours
Published 2020-01-01“…This work investigates laser-induced fluorescence spectroscopy of fluorescence inclusions that are embedded in turbid media. 405 nm laser diode is used for exciting buried protoporphyrin- (PpIX) based inclusions in brain-like optical phantoms. …”
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286
Enhancement of Spurious Signal Suppression in Microstrip Mixers by Load Resistor Termination
Published 2025-01-01“…The simulation results show that by adding the load resistor, the parasitic electrical field on the diode and the reflection signal inside the mixer can be reduced. …”
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287
Charge-Carrier Transport in Thin Film Solar Cells: New Formulation
Published 2011-01-01“…In the new framework given, the calculation of the open-circuit voltage of the solar cell diode does not lead to unphysical results.…”
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288
XEN45 Gel Stent Combined with Healaflow Injectable Viscoelastic Implant
Published 2023-01-01“…For patients with a history of unsuccessful glaucoma surgeries and who are unsuitable candidates for tube shunt procedures or transscleral diode cyclophotocoagulation, an alternative option involves implanting the XEN45 stent in the inferior nasal region in conjunction with the use of subconjunctival Healaflow. …”
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289
A Single DC Source Generalized Switched Capacitors Multilevel Inverter with Minimal Component Count
Published 2023-01-01“…To produce a waveform with seven output voltage levels, the suggested switching capacitor inverter consists of eight switches, single diode, and two capacitors. Because capacitors are inherently balanced, there is no need for a balancing circuit or sensor. …”
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290
Design and Construction of a Water Quality Monitoring System Using GSM.
Published 2023“…The turbidity sensor consists of a photodiode and an infrared light emitting diode. Measurements of water turbidity is based on the principles of light scattering in the water. …”
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291
Determining Bandgap of Thermochromic Phosphor Films via Reflectance Measurements under Controlled Heating.
Published 2024“…The phosphor is illuminated by a light-emitting diode while being heated continuously. The reflected light is detected using a calibrated photodiode circuit based on an operational transconductance amplifier. …”
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292
Determining Bandgap of Thermochromic Phosphor Films via Reflectance Measurements under Controlled Heating
Published 2024“…The phosphor is illuminated by a light-emitting diode while being heated continuously. The reflected light is detected using a calibrated photodiode circuit based on an operational transconductance amplifier. …”
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293
Deep learning based demodulation method for multiple access of visible light communication in 6G
Published 2024-08-01“…Because the modulation bandwidth of the light emitting diode is narrow, the capacity of the visible light communication system is limited, the spectral efficiency and number of endpoint user can be improved by the multiple access technique. …”
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294
Laser Therapy and Dementia: A Database Analysis and Future Aspects on LED-Based Systems
Published 2014-01-01“…First results concerning the measurement of the transmission factor (TF) through the human skull of a new LED- (light emitting diode-) based system are presented (TF = 0.0434 ± 0.0104 (SD)). …”
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295
Transmembrane voltage-gated nanopores controlled by electrically tunable in-pore chemistry
Published 2025-02-01“…Reversible actuation of these physicochemical processes creates a nanofluidic diode of rectification ratio exceeding 40000. The dynamic nature of the in-pore reactions also facilitates a memristor of sub-nanowatt power consumption. …”
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296
Experimental Analysis of the Potential Induced Degradation Effect on Organic Solar Cells
Published 2017-01-01“…From the analysis, it is apparent that annealing, air, gaseous oxygen, and oxygen plasma degradation have similar effects with PID, while due to simple diode characteristics, organic cells proved to be relatively durable to potential induced degradation. …”
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297
An AMOLED AC-Biased Pixel Design Compensating the Threshold Voltage and I-R Drop
Published 2011-01-01“…We propose a novel pixel design and an AC bias driving method for active-matrix organic light-emitting diode (AM-OLED) displays using low-temperature polycrystalline silicon thin-film transistors (LTPS-TFTs). …”
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298
Automatic 4-mirrors system for alignment of high-power laser radiation
Published 2024-02-01“…As an alignment laser, the diode laser with a fiber output was used with radiation characteristics coinciding with the parameters of the main beam (wavelength, beam diameter). …”
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299
No-Needle Jet Intradermal Aminolevulinic Acid Photodynamic Therapy for Recurrent Nodular Basal Cell Carcinoma of the Nose: A Case Report
Published 2011-01-01“…Photoactivation was then performed using red light emitting diode [CW @ λ 630 nm, irradiance 50 mW/cm2, total fluence 51 J/cm2] for 17 minutes. …”
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300
Spectroscopy in heterogenous media and applications for bioprocess and environmental monitoring
Published 2002-01-01“…Diffuse reflectance measurements and photon migration studies with near infrared (NIR) diode lasers were employed to elucidate experimental methods for determining absorption and scattering coefficients and species concentrations in heterogenous media. …”
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