Results 1 to 10 of about 537,557 (300)

Hollow CoS/C Structures for High-Performance Li, Na, K Ion Batteries

open access: yesFrontiers in Chemistry, 2022
Alkali ion (Li, Na, and K) batteries as a new generation of energy storage devices are widely applied in portable electronic devices and large-scale energy storage equipment.
Yan Liu   +14 more
doaj   +1 more source

Implementation of Magnetoelectric Dipoles in Metasurfaces for 5G Applications

open access: yesIEEE Open Journal of Antennas and Propagation, 2022
The well-known magnetoelectric dipole (ME-dipole) has huge adoption in antenna designs. In this paper, we manage to implement ME-dipoles in metasurfaces.
Xuexuan Ruan, Kai Wang, Qinyu Zhang
doaj   +1 more source

Preliminary evaluation of polarimetric parameters from a new dual-polarization C-band weather radar in an alpine region [PDF]

open access: yesAdvances in Geosciences, 2010
The first operational weather radar with dual polarization capabilities was recently installed in Austria. The use of polarimetric radar variables rises several expectations: an increased accuracy of the rain rate estimation compared to standard Z-R ...
H. Paulitsch, F. Teschl, W. L. Randeu
doaj   +1 more source

Microwave scattering from ice crystals: how much parameters can differ from equal volume spheres [PDF]

open access: yesAdvances in Geosciences, 2010
The scattering properties of ice crystals at centimeter and millimeter wavelengths are fundamental for their measurement with radars or radiometers as well as for many other applications in remote sensing.
F. Teschl, W. L. Randeu, R. Teschl
doaj   +1 more source

Mitigation of PA Nonlinearity for IEEE 802.11ah Power-Efficient Uplink via Iterative Subcarrier Regularization

open access: yesIEEE Access, 2021
An orthogonal frequency division multiplexing (OFDM) transmitter for 802.11ah uplink may consume unnecessarily high power due to the malicious effect of a large peak-to-average power ratio (PAPR).
Li Cho   +3 more
doaj   +1 more source

Supporting Heterogenous Traffic on Top of Point-to-Multipoint Light-Trees

open access: yesSensors, 2023
New 5 G and beyond services demand innovative solutions in optical transport to increase efficiency and flexibility and reduce capital (CAPEX) and operational (OPEX) expenditures to support heterogeneous and dynamic traffic.
Masab Iqbal   +6 more
doaj   +1 more source

Power minimization for GSIC-based uplink cell-free massive MIMO-NOMA systems

open access: yesEURASIP Journal on Advances in Signal Processing, 2022
Non-orthogonal multiple access (NOMA) and multiple-input multiple-output (MIMO) are considered promising techniques to satisfy the demands for high spectrum efficiency and massive connectivity in future wireless communication.
Tao Cui   +3 more
doaj   +1 more source

Biorthogonal Fourier transform for multichirp-rate signal detection over dispersive wireless channel

open access: yesEURASIP Journal on Wireless Communications and Networking, 2018
Biorthogonal Fourier transform (BFT), consistent with the matched signal transform (MST), has been introduced to demodulate the M-ray chirp-rate signal which possesses good orthogonality in the BFT domain.
Lin Zheng   +3 more
doaj   +1 more source

Survey: Using Augmented Reality to Improve Learning Motivation in Cultural Heritage Studies

open access: yesApplied Sciences, 2020
Cultural Heritage (CH) refers to the representation of historical places and traditional customs of a specific city or country. Its principal aim is to transmit to future generations how their ancestors lived, and what their customs and buildings were ...
Juan Camilo González Vargas   +3 more
doaj   +1 more source

Broadband: a solution to rural e-learning? [PDF]

open access: yes, 2004
Rural and remote learners are disadvantaged even with online provision due to poor connections. Broadband offers a potential solution. This paper looks at the initial results of a project to install broadband services in the Western Isles of Scotland. It
Mason, Robin, Rennie, Frank
core   +2 more sources

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