Results 21 to 30 of about 594,798 (294)

A Double-Layer Patch Antenna for 5–6 GHz Wireless Communication

open access: yesMicromachines, 2022
This paper proposes a compact double-layer microstrip patch antenna with a wide bandwidth of 4.83–6.1 GHz and a gain reaching 4.7 dBi. By folding its mirror image through the electric field symmetry principle of the microstrip antenna, its electrical ...
Xue-Ping Li   +5 more
doaj   +1 more source

On the validity of the “thin” and “thick” double-layer assumptions when calculating streaming currents in porous media [PDF]

open access: yes, 2012
We find that the thin double layer assumption, in which the thickness of the electrical diffuse layer is assumed small compared to the radius of curvature of a pore or throat, is valid in a capillary tubes model so long as the capillary radius is >200 ...
Jackson, MD, Leinov, E
core   +3 more sources

Optimasi sistem kultur dan media untuk peningkatan tinggi tunas in vitro kelapa sawit

open access: yesMenara Perkebunan, 2023
Optimization of in vitro shoot growth is necessary to shorten the culture time and produce vigorous oil palm plantlets. This research was conducted to determine the best media and culture techniques to accelerate in vitro shoot growth of oil palm. Shoots
Masna Maya Sinta   +3 more
doaj   +1 more source

Direct determination of the step-edge formation energies of the energetically stable and unstable double-layer step edges of Si(001) [PDF]

open access: yes, 1996
Scanning tunneling microscopy images of 4.5° misoriented double B stepped Si(001) have been analyzed to determine the double-layer step-edge formation energies of the energetically stable double step (B-type) as well as the energetically unstable double
Dijken, S. van   +2 more
core   +2 more sources

Enhanced intervalley scattering in artificially stacked double-layer graphene

open access: yesNew Journal of Physics, 2014
We fabricated artificially stacked double-layer graphene by sequentially transferring graphene grown by chemical vapor deposition. The double-layer graphene was characterized by Raman spectroscopy and transport measurements.
M Z Iqbal   +5 more
doaj   +1 more source

Characterization and Control of an Ion-Acoustic Plasma Instability Downstream of a Diverging Magnetic Nozzle

open access: yesFrontiers in Physics, 2020
The study and control of resonant instabilities in magnetized plasmas is of fundamental interest over a wide range of applications from industrially relevant plasmas to plasma sources for spacecraft propulsion.
Scott J. Doyle   +5 more
doaj   +1 more source

Double-Layer 45° Linearly Polarized Wideband and Highly Efficient Transmitarray Antenna

open access: yesIEEE Open Journal of Antennas and Propagation, 2021
This letter presents a double-layer 45° linearly polarized (LP) wideband and highly efficient transmitarray antenna (TA). The proposed element is composed of two multi-resonant dipoles and four metal vias. The dipoles are placed on the diagonal of
Ming-Bo Cai   +4 more
doaj   +1 more source

Oblique propagation of solitary electrostatic waves in magnetized plasmas with cold ions and nonthermal electrons [PDF]

open access: yes, 2017
Oblique propagation of large amplitude electrostatic waves and solitary structures is investigated in magnetized plasmas, comprising cold fluid ions and Cairns nonthermally distributed electrons, by using a Sagdeev pseudopotential formalism.
Hellberg, Manfred A, Verheest, Frank
core   +1 more source

Physical and Electrochemical Area Determination of Electrodeposited Ni, Co, and NiCo Thin Films [PDF]

open access: yes, 2015
The surface area of electrodeposited thin films of Ni, Co, and NiCo was evaluated using electrochemical double-layer capacitance, electrochemical area measurements using the [Ru(NH$_3$)$_6$]$^{3+}$/[Ru(NH$_3$)$_6$]$^{2+}$ redox couple, and topographic ...
Gira, Matthew J.   +2 more
core   +3 more sources

Double-layer anti-reflection coating of SiO2–TiO2/SiO2–TiO2-PEG300 with high transmittance and super-hydrophilicity

open access: yesMaterials Research Express, 2020
A highly transparent and super-hydrophilic double-layer anti-reflection coating was prepared by a simple and economical sol-gel method based on the glass substrate.
Yong Shuai Wei   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy