Results 1 to 10 of about 460,773 (264)

Dirt on photovoltaic modules and efficient energy generation in the Brazilian semiarid

open access: yesRevista Brasileira de Engenharia Agrícola e Ambiental, 2022
A photovoltaic electrical energy system is one of the least aggressive ways to affect the environment. Factors such as dirt influence the efficiency of these systems and can have a considerable impact in low rainfall regions, such as the Brazilian ...
Tiago L. S. de Souza   +2 more
doaj   +1 more source

CMOS-Compatible Micro Photovoltaic Generator with Post-Processing Enhanced Optical Absorption

open access: yesMicromachines
This work reports the design and realization of a silicon-based micro photovoltaic generator (MPG) fabricated using a standard 0.18 μm complementary metal oxide semiconductor (CMOS) technology.
Hung-Wei Chen   +2 more
doaj   +1 more source

Effect of variation of specifications of quantum well and contact length on performance of InP-based Vertical Cavity Surface Emitting Laser (VCSEL) [PDF]

open access: yesJournal of Optoelectronical Nanostructures, 2020
: In this study, the effects of variation of thickness and the number of quantumwells as well as the contact length were investigated. In this paper, a vertical cavity surfaceemitting laser was simulated using of software based on finite element method ...
Abbas Ghadimi, Mohamad Ahmadzadeh
doaj  

An Array Magnetic Coupling Piezoelectric and Electromagnetic Energy Harvester for Rotary Excitation

open access: yesMicromachines, 2023
The energy of rotating machinery exists widely in the environment. It is of great significance to collect and utilize the energy of rotating machinery for sustainable development. In this paper, a novel piezoelectric and electromagnetic energy harvester,
Qiuxuan Chen, Chong Li, Mingming Lv
doaj   +1 more source

Improving the Misalignment Tolerance of Wireless Power Transfer System for AUV with Solenoid-Dual Combined Planar Magnetic Coupler

open access: yesJournal of Marine Science and Engineering, 2023
In order to solve the problem of power transmission efficiency reduction resulting from misalignment in the Wireless Power Transfer (WPT) system for Autonomous Underwater Vehicle (AUVs), a novel coupling structure with strong tolerance to misalignment is
Haibing Wen   +7 more
doaj   +1 more source

A Micro-Power Generator Based on Two Piezoelectric MFC Films

open access: yesCrystals, 2021
In order to realize the collection of micro or small vibration energy, a micro-power generator based on two piezoelectric Macro Fiber Composite (MFC) films is proposed. The piezoelectric generator consists of a double piezoelectric MFCs type vibrator and
Yongxin Ma   +3 more
doaj   +1 more source

1 W/mm Output Power Density for H-Terminated Diamond MOSFETs With Al2O3/SiO2 Bi-Layer Passivation at 2 GHz

open access: yesIEEE Journal of the Electron Devices Society, 2021
We have demonstrated a novel method of depositing ALD-Al2O3/PECVD-SiO2 bi-layer dielectric to passive the surface channels of the hydrogen-terminated diamond (H-diamond).
Xinxin Yu   +7 more
doaj   +1 more source

Design of a Data Logging System for a Small Scale Hydrokinetic Turbine

open access: yesASM Science Journal, 2021
A suitable data logger is needed for data collection to demonstrate the practicality of Hydrokinetic Turbine (HKT) in a rural application. Currently, commercial data loggers are expensive and consume extensive amounts of energy.
DIANA ANAK RINGGAU
doaj   +1 more source

Technical Characterization of a High-Power Diode Laser at 445 nm for Medical Applications: From Continuous Wave Down to Pulse Durations in the µs-Range

open access: yesApplied Sciences
The technical development of diode lasers with regard to wavelengths, output powers and pulse durations in the order of microseconds is expanding the range of medical applications. The 445 nm wavelength, in particular, offers a promising approach. Such a
Zhaoqun Liu   +3 more
doaj   +1 more source

SCHOTTKY DIODE TRIPLER IN THE 3-MM WAVE RECEIVER FOR INVESTIGATION OF ATMOSPHERIC GASES

open access: yesRadio Physics and Radio Astronomy, 2015
A Schottky diode frequency tripler for the 3-mm receiver system designed for observation of ozone and carbon monoxide spectral lines at frequencies 110.836 and 115.271 GHz, respectively, is developed. The used varactor parameters are investigated and its
V. I. Piddyachiy
doaj   +1 more source

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