Results 41 to 50 of about 329,283 (282)

Transverse Wave Propagation in Relativistic Two-fluid Plasmas in de Sitter Space

, 2008
We investigate transverse electromagnetic waves propagating in a plasma in the de Sitter space. Using the 3+1 formalism we derive the relativistic two-fluid equations to take account of the effects due to the horizon and describe the set of simultaneous ...
A. Strominger, A. Strominger, A.G. Reiss, A.H. Guth, B. Schmidt, C.G. Tsagas, C.G. Tsagas, C.G. Tsagas, C.G. Tsagas, C.M. Hull, C.M. Hull, C.P. Dettman, D. Papadopoulos, D.A. Macdonald, E. Harris, F. Jüttner, J. Bernstein, J. Daniel, J. Sakai, J.P. Ostriker, K. Kleidis, K. Kleidis, K. Subramanian, K.A. Holcomb, K.A. Holcomb, K.S. Thorne, K.S. Thorne, M. Atiqur Rahman, M. Forsberg, M. Hossain Ali, M. Marklund, M. Marklund, M. Servin, N. Bahcall, P.O. Mazur, R. Narayan, R.H. Price, S. Perlmutter, S. Perlmutter, T. Vachaspati, V. Buzzi, V. Buzzi, X.-H. Zhang, X.-H. Zhang   +43 more
core   +1 more source

Search For Gravitational Waves Through the Electromagnetic Faraday Rotation [PDF]

, 2006
A method is given which renders indirect detection of strong gravitational waves possible. This is based on the reflection (collision) of a linearly polarized electromagnetic shock wave from (with) a cross polarized impulsive and shock gravitational ...
C. Barrabes, J. B. Griffiths, M. Halilsoy, O. Gurtug   +3 more
core   +2 more sources

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

PAM-8 IM/DD Transmission Based on Modified Lookup Table Nonlinear Predistortion

IEEE Photonics Journal, 2018
In this paper, a modified lookup table (LUT) nonlinear predistortion method is proposed. With the modified LUT method, the number of patterns and the computational complexity can be reduced by half with a similar system performance comparing with normal ...
Jiao Zhang, Pengqi Gou, Miao Kong, Kaibo Fang, Jiangnan Xiao, Qi Zhang, Xiangjun Xin, Jianjun Yu   +7 more
doaj   +1 more source

Three‐dimensional Antimony Sulfide Based Flat Optics

Advanced Functional Materials, EarlyView.
This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang, Uwe Hübner, Anne Gärtner, Tao Chen, Joseph Köbel, Franka Jahn, Daniel Repp, Abhrodeep Dey, Henrik Schneidwind, Andrea Dellith, Jan Dellith, Torsten Wieduwilt, Matthias Zeisberger, Tanveer Ahmed Shaik, Astrid Bingel, Markus A. Schmidt, Jer‐Shing Huang, Ulf Peschel, Volker Deckert   +18 more
wiley   +1 more source

Few-Shot Object Detection With Self-Adaptive Global Similarity and Two-Way Foreground Stimulator in Remote Sensing Images

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Few-shot object detection (FSOD) aims to localize and recognize potential objects of interest only by using a few annotated data, and it is beneficial for remote sensing images (RSIs) based applications, such as urban monitoring. Previous RSIs-based FSOD
Yuchen Zhang, Bo Zhang, Bin Wang
doaj   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Recognition of Volumetric Scattering of Lunar Regolith Media in the PSR via Fully Polarimetric SAR Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Data of fully polarimetric synthetic aperture radar onboard Chandrayaan-2 make it feasible to analyze the geometric and physical properties of the lunar soil layer. A specific mission of Chandrayaan-2 is to investigate if there is water–ice in the
Niutao Liu, Feng Xu, Ya-Qiu Jin
doaj   +1 more source

The Effect of Purcell Cavities on the Lifetime of Thermally Activated Delayed Fluorescent Emitters

Advanced Functional Materials, EarlyView.
A pressing challenge to OLED displays and lighting is to balance high efficiency and long operational lifetime in the deep blue spectrum. The Purcell effect can reduce the triplet density and hence the probability for destructive energy‐driven triplet annihilation events that limit the OLED lifetime. Here we study of the Purcell effect on two different
Sritoma Paul, Haonan Zhao, Collin N. Muniz, Mark E. Thompson, Stephen R. Forrest   +4 more
wiley   +1 more source

Integrated sensing and communication based on space-time-coding metasurfaces

Nature Communications
Programmable metasurfaces (PMs), also called reconfigurable intelligent surfaces (RISs), are planar structures capable of dynamically manipulating electromagnetic waves in real-time.
Xiao Qing Chen, Lei Zhang, Yi Ning Zheng, Shuo Liu, Zhuo Ran Huang, Jing Cheng Liang, Marco Di Renzo, Vincenzo Galdi, Tie Jun Cui   +8 more
doaj   +1 more source