Results 81 to 90 of about 113,158 (265)

Hard‐Magnetic Soft Millirobots in Underactuated Systems

Advanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang, Zixuan Zhang, Bingyan Li, Junkai Wang, Hongcheng Gu   +4 more
wiley   +1 more source

Nonlinear Electromagnetic Waves in Magnetosphere of a Magnetar

, 2010
We compute electromagnetic wave propagation through the magnetosphere of a magnetar. The magnetosphere is modeled as the QED vacuum and a cold, strongly magnetized plasma.
Adler, Blaes, Cangemi, Cangemi, Cattaert, Chian, Dan Mazur, Galtsov, Gill, Heisenberg, Heyl, Heyl, Heyl, Heyl, Heyl, Heyl, Heyl, Jackson, Jenet, Jeremy S. Heyl, Kozlov, Lai, Lutzky, Mereghetti, Meszaros, Meszaros, Mészáros, Mészáros, Mészáros, Rajaraman, Schwinger, Thompson, Thompson, Weisskopf   +33 more
core   +1 more source

Ga Doping Enables Precision Alloy‐to‐Wire Regulation: Synergistic Enhancement of the Mechanical Properties of CuSn Alloy and the Superconducting Properties of Nb3Sn

Advanced Science, EarlyView.
By adjusting Ga's doping in Cu–Sn alloy, an ultra‐high elongation of 100.8% is achieved in first time. Ga forms a stable solid solution structure and a stronger electron exchange with Cu. This enhances strength‐ductility synergistically by tuning SFE to balance twinning and slip.
Dazhuo Song, Juntao Zou, Jiayue Zhang, Xinhang Liang, Mengyu Shan, Yifan Liu, Jingqi Feng, Tong Dang, Lin Shi, Yuxuan Wang, Yuchen Song, Rong Fei, Shaodong Sun, Zhe Zhang, Lei Zhu, Lixing Sun   +15 more
wiley   +1 more source

A HIGH-ACCURACY METHOD OF COMPUTATION OF X-RAY WAVES PROPAGATION THROUGH AN OPTICAL SYSTEM CONSISTING OF MANY LENSES

TASK Quarterly, 2016
The propagation of X-ray waves through an optical system consisting of many X-ray refractive lenses is considered. Two differential equations are contemplated for solving the problem for electromagnetic wave propagation: first – an equation for the ...
SERGEY KSHEVETSKII, PAWEL WOJDA
doaj   +1 more source

Photon‐Sphere Modes in Curved Optical Microcavities: A Black‐Hole Analogue Laser

Advanced Science, EarlyView.
An optical analogue of a Schwarzschild black hole is realized using curved microcavities that preserve light‐like geodesics. A new family of laser modes confined around the photon sphere is identified alongside conventional whispering‐gallery modes. Analytical theory, numerical simulations, and experiments reveal curvature‐induced confinement, enabling
Chenni Xu, Aswathy Sundaresan, Nazire‐Begüm Kazkal, Clement Lafargue, Lior Zarfaty, Li‐Gang Wang, Ofek Birnholtz, Dominique Decanini, Melanie Lebental, Patrick Sebbah   +9 more
wiley   +1 more source

Causal explanation for observed superluminal behavior of microwave propagation in free space

, 2001
In this paper we present a theoretical analysis of an experiment by Mugnai and collaborators where superluminal behavior was observed in the propagation of microwaves.
A.L. Xavier, Bolda, Bosanac, Brillouin, Courant, D.S. Thober, de Oliveira, Durnin, Durnin, Emig, Enders, Fujiwara, Garret, Jackson, Lu, Lu, Maiorino, Morse, Mugnai, Nimtz, Rodrigues, Saari, Steinberg, Stratton, Taylor, W.A. Rodrigues, Wang, Wu, Zhou   +28 more
core   +1 more source

A Bottom‐Up Design Framework for Multifunctional Lattice Metamaterials

Advanced Science, EarlyView.
This study introduces a generative AI framework for designing multifunctional lattice metamaterials. The method combines 3D Gaussian voxel generation with deep learning, enabling greater design freedom and structural performance. The optimized lattice metamaterials achieve enhanced energy absorption by 40–200% compared to conventional structures and ...
Zongxin Hu, Quanqing Tao, Junhao Ding, Shuo Qu, Haitao Ye, Jun Wei Chua, Tianxiao Niu, Rui Li, Winston Wai Shing Ma, Haoming Mo, Hui Liu, Wei Zhai, Xinwei Li, Xu Song   +13 more
wiley   +1 more source

Negative phase velocity of electromagnetic waves and the cosmological constant

, 2004
Examining the propagation of electromagnetic plane waves with the wavevector directed in opposition to the time-averaged Poynting vector in cosmological spacetime with piecewise uniform metric, we show that such negative-phase-velocity (NPV) propagation ...
Lakhtakia, Akhlesh, Mackay, Tom G., Setiawan, Sandi   +2 more
core   +3 more sources

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Accelerated iterative solvers for the solution of electromagnetic scattering and wave propagation propagation problems [PDF]

, 2016
The aim of this work is to contribute to the development of accelerated iterative methods for the solution of electromagnetic scattering and wave propagation problems. In spite of recent advances in computer science, there are great demands for efficient and accurate techniques for the analysis of electromagnetic problems.
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