Results 21 to 30 of about 5,734,608 (301)

UV Filtering of Dye-Sensitized Solar Cells: The Effects of Varying the UV Cut-Off upon Cell Performance and Incident Photon-to-Electron Conversion Efficiency

open access: yesInternational Journal of Photoenergy, 2012
With current technology, UV filters are essential to ensure long-term dye-sensitized solar cell (DSC) stability. Blocking photons, however, will have an obvious effect on device performance and upon its incident photon-to-current conversion efficiency ...
Matthew Carnie   +2 more
doaj   +1 more source

Specific heat and energy for the three-dimensional O(2) model [PDF]

open access: yes, 2001
We investigate the three-dimensional O(2) model on lattices of size 8^3 to 160^3 close to the critical point at zero magnetic field. We confirm explicitly the value of the critical coupling J_c found by Ballesteros et al. and estimate there the universal
Engels, J., Holtmann, S., Schulze, T.
core   +3 more sources

Specific cutting energy consumption in a circular saw for eucalyptus stands WM01 and MN463 [PDF]

open access: yes, 2011
Modern technologies for continuous carbonization of Eucalyptus sp. require special care in wood cutting procedures. Choosing the right tool, cutting speeds and feed rates is important to manage time and energy consumption, both of which being critical ...
Gomes Gontijo, Thiago   +5 more
core   +2 more sources

Synthesis and electrochemical Li-storage performance of Li2ZrO3-Li3V2(PO4)3/C composites

open access: yesElectrochemistry Communications, 2021
A simple and efficient synthetic route was developed to obtain composites by mechanically ball-milling Li2ZrO3 (LZO) with Li3V2(PO4)3/C (LVPC). LZO improves the ionic conductivity of LVPC, compensates for the transfer of Li+ between the LVPC and the ...
Limin Zhu   +3 more
doaj   +1 more source

Opportunities for and challenges to further reductions in the “specific power” rating of wind turbines installed in the United States [PDF]

open access: yes, 2021
A wind turbine’s “specific power” rating relates its capacity to the swept area of its rotor in terms of Watt per square meter. For a given generator capacity, specific power declines as rotor size increases.
Bolinger, M   +5 more
core  

Optimal Voltage Control Method for a Step Voltage Regulator Considering the Under-Load Tap Changer in a Distribution System Interconnected with a Renewable Energy Source

open access: yesEnergies, 2023
The voltage in distribution systems is controlled by the under-load tap changer of the substation and the pole transformer of the primary feeders. Recently, as one of the main countermeasures, a step voltage regulator is being introduced to solve voltage
Hyun-ok Lee   +3 more
doaj   +1 more source

One-step growth of thin film SnS with large grains using MOCVD

open access: yesScience and Technology of Advanced Materials, 2018
Thin film tin sulphide (SnS) films were produced with grain sizes greater than 1 μm using a one-step metal organic chemical vapour deposition process. Tin–doped indium oxide (ITO) was used as the substrate, having a similar work function to molybdenum ...
Andrew J. Clayton   +4 more
doaj   +1 more source

Estimation of specific cutting energy in an S235 alloy for multi-directional ultrasonic vibration-assisted machining using the Finite Element Method [PDF]

open access: yes, 2020
The objective of this work is to analyze the influence of the vibration-assisted turning process on the machinability of S235 carbon steel. During the experiments using this vibrational machining process, the vibrational amplitude and frequency of the ...
Florez García, Luis Carlos   +2 more
core   +2 more sources

Functionalized Carbon Nanotube and MnO2 Nanoflower Hybrid as an Electrode Material for Supercapacitor Application

open access: yesMicromachines, 2021
Functionalized carbon nanotube (FCNT) and Manganese Oxide (MnO2) nanoflower hybrid material was synthesized using hydrothermal technique as a promising electrode material for supercapacitor applications.
Sagar Mothkuri   +5 more
doaj   +1 more source

Shape dependent finite-size effect of critical two-dimensional Ising model on a triangular lattice

open access: yes, 2012
Using the bond-propagation algorithm, we study the finite-size behavior of the critical two-dimensional Ising model on a finite triangular lattice with free boundaries in five shapes: triangle, rhombus, trapezoid, hexagon and rectangle. The critical free
Guo, Wenan   +2 more
core   +1 more source

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