Results 131 to 140 of about 40,193 (246)

Microwave Wireless Power Transfer for Mid-Air UAV Charging Using a Distributed Tiled Rectenna Architecture in 5G-Enabled Aerial Networks

IEEE Access
Mid-air charging is a key enabler for persistent uncrewed aerial vehicle (UAV) operation in 5G-enabled aerial networks, but practical microwave wireless power transfer (WPT) is constrained by how the receive rectenna can be integrated on small multi ...
Joko Suryana, Naufal Z. Nabhan, Ali Rhomadoni, M. Iqbal Arrachman, Reuben T. C. Simatupang   +4 more
doaj   +1 more source

Kompetensi guru dalam pengajaran amali reka bentuk dan teknologi di Sekolah Rendah Daerah Batu Pahat [PDF]

, 2007
Kompetensi bermaksud kemampuan atau kecekapan seseorang individu dalam melakukan sesuatu tugasan. Kompetensi juga merujuk kepada kemampuan seseorang dalam melaksanakan sesuatu yang diperolehi melalui pendidikan dan juga merujuk kepada prestasi dan ...
Md Harun, Zaiha Nabila
core  

Ultrahigh‐Order Harmonic Mode‐Locked Optoelectronic Oscillator

Laser &Photonics Reviews, EarlyView.
This article demonstrates a record‐breaking microwave frequency comb generator using an ultrahigh‐harmonic‐order mode‐locked optoelectronic oscillator. By integrating dual recirculating loops into a low‐coherence system, the researchers achieved a harmonic order of 956 with superior noise suppression.
Zhuoran Wang, Santiago Bernal, David V. Plant, Lawrence R. Chen   +3 more
wiley   +1 more source

The State of the Art of Research on Power Supply Technologies for Moving Targets

Energies
With the advancement of power electronics, control systems, and related technologies, devices such as unmanned aerial vehicles (UAVs), airships, and electric vehicles (EVs) have become integral to modern life and industry.
Man Ruan, Xudong Wang, Wanli Xu, Mengyi Wang, Peiqiang Chen, Jinmao Chen   +5 more
doaj   +1 more source

Focusing Microwave Radiation for Long-Distance Wireless Power Transfer in Space

IEEE Microwave Magazine
Radiative wireless power transfer (WPT) uses freely propagating electromagnetic (EM) radiation for long-distance energy distribution. Microwaves, which are not strongly affected by the atmosphere [1], can be focused into beams for higher efficiencies. Thus, the need for cables and batteries can be reduced, minimizing costs and enabling power supply to ...
Ricardo A. M. Pereira, Amit Baghel, Helena Ribeiro, Enrico Fazzini, Tommaso Tiberi, A. Baris Gok, Alessandra Costanzo, Diego Masotti, Nuno Borges Carvalho   +8 more
openaire   +1 more source

Frozen Differential Scattering in Reconfigurable Complex Media

Laser &Photonics Reviews, EarlyView.
A localized perturbation universally results in a rank‐one update of the scattering matrix of any complex medium. The resulting differential output wavefront is “frozen”: its spatial pattern is fixed (agnostic to the input wavefront). Experiments with a programmable‐metasurface‐parametrized wireless link validate frozen differential scattering and ...
Philipp del Hougne
wiley   +1 more source

Optical‐to‐Microcomb Stability Transfer for Ultrastable Timing and Microwave/Millimeter‐Wave Generation

Laser &Photonics Reviews, EarlyView.
This work demonstrates a high‐fidelity stability transfer from an optical reference to a high‐repetition‐rate microcomb using a mode‐locked laser bridge. By employing electro‐optic sampling timing detection, femtosecond‐level synchronization and 10−18‐level fractional frequency stability are achieved.
Changmin Ahn, Junyong Choi, Daewon Suk, Hansuek Lee, Jungwon Kim   +4 more
wiley   +1 more source

Boron‐10 carriers and their applications in boron neutron capture therapy

Precision Radiation Oncology, EarlyView.
Summary of different types of boron drugs. Abstract Boron neutron capture therapy (BNCT) has emerged as a promising therapeutic modality in cancer treatment, demonstrating the ability to selectively eliminate cancer cells through the 10B(n,α)7Li nuclear reaction with minimal side effects on normal tissues.
Dachao Tang, Mengqi Shi, Zhichen Mao, Weiya Chen, Xiaoling Li, Xiao Yan Zhao, Zhigang Liu, Xiao Xu   +7 more
wiley   +1 more source

Enhancing Charge Transport and Extraction in Ta3N5 Photoanodes Via Ti Doping and TiN Contact Layers

Small, EarlyView.
Ta3N5${\rm Ta}_3{\rm N}_{5}$ is a promising photoanode for solar water splitting but suffers from poor charge transport and interfacial losses. We combine Ti compensation doping with ultrathin TiN back‐contact interlayers to suppress bulk recombination, enhance carrier mobility and lifetime, and enable efficient carrier extraction, yielding ...
Laura I. Wagner, Dominik Moser, Dennis Friedrich, Frans Munnik, Olivier Henrotte, Emiliano Cortés, Roel van de Krol, Verena Streibel, Ian D. Sharp   +8 more
wiley   +1 more source

Single Cu Atom Sites on Co3O4 Activate Interfacial Oxygen for Enhanced Reactivity and Selective Gas Sensing at Low Temperature

Small, EarlyView.
Atomically dispersed Cu sites on Co3O4 nanoparticles establish well‐defined Cu–O–Co interfacial linkages that promote lattice oxygen activation at markedly reduced temperatures. This structural and electronic modulation yields over twenty‐fold higher low‐temperature formaldehyde sensing responses than CuO nanoparticle analogues, enabling selective and ...
Hamin Shin, Matteo D'Andria, Meng Yin, Jaehyun Ko, Ken Suzuki, Dong‐Ha Kim, Frank Krumeich, Andreas T. Güntner   +7 more
wiley   +1 more source