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In ambient backscatter communication (AmBC) systems, passive tags connect to a reader by reflecting an ambient radio frequency (RF) signal. However, the reader may not know the channel states and RF source parameters. The traditional energy…

信息论 · 计算机科学 2024-06-13 S. Zargari , C. Tellambura , A. Maaref

Enhanced $D_{\alpha}$ H-mode (EDA H-mode), an ELM-free H-mode regime, is explored in neutral beam heated, lower single null plasmas with near zero torque injection. This regime exhibits a good energy confinement…

We demonstrate that in highly magnetized pair plasmas, nonlinear Alfven waves with wave-number $k \leq k_0 = \omega_p^2 /(\delta \omega_B)$ ($\delta =( \delta B)/B_0$ are relative fluctuations of the magnetic field) experience powerful…

高能天体物理现象 · 物理学 2026-05-05 Maxim Lyutikov

The aim of this work is to investigate the effects of customized electrodes on the electron heating dynamics of the COST-Jet. The COST-Jet is operated with an applied sinusoidal alternating voltage of 13.56 MHz. With the help of phase…

等离子体物理 · 物理学 2021-04-02 Lena Bischoff

Audiovisual active speaker detection (ASD) in egocentric recordings is challenged by frequent occlusions, motion blur, and audio interference, which undermine the discernability of temporal synchrony between lip movement and speech.…

多媒体 · 计算机科学 2025-08-15 Jason Clarke , Yoshihiko Gotoh , Stefan Goetze

In low-collisionality scenarios exhibiting mitigation of edge localized modes (ELMs), stable ideal kink modes at the edge are excited by externally applied magnetic perturbation (MP)-fields. In ASDEX Upgrade these modes can cause…

Using the recently observed torsional Alfv\'en waves in solar prominences, we determine the ionisation state of the plasma by taking into account that Alfv\'en waves propagate in a partially ionised prominence plasma. We derive the…

太阳与恒星天体物理 · 物理学 2020-02-21 Istvan Ballai

Using electron drift wave (eDW) as a paradigm model, we have investigated analytically direct wave-wave interactions between a test DW and ambient toroidal Alfv\'en eigenmodes (TAE) in toroidal plasmas, and their effects on the stability of…

等离子体物理 · 物理学 2023-06-28 Liu Chen , Zhiyong Qiu , Fulvio Zonca

With the development of laser technologies, nuclear reactions can happen in high-temperature plasma environments induced by lasers and have attracted a lot of attention from different physical disciplines. However, studies on nuclear…

仪器与探测器 · 物理学 2021-06-18 Po Hu , Zhiguo Ma , Kai Zhao , Guoqiang Zhang , Deqing Fang , Baoren Wei , Changbo Fu , Yugang Ma

Characterizing the gap eigenmode of shear Alfv\'{e}n waves (SAW) and its interaction with energetic ions is important to the success of magnetically confined fusion. Previous studies have reported an experimental observation of the spectral…

等离子体物理 · 物理学 2018-11-30 Lei Chang

The prospect of identifying axion signals due to axion-photon coupling induced changes to the polarization has now become a reality in view of near-horizon polarimetric observations by the Event Horizon Telescope (EHT). Axion-like particles…

高能天体物理现象 · 物理学 2026-03-04 Dashon Michel Jones , Richard Anantua , Razieh Emami , Nate Lujan

Luminescence intensity autocorrelation (LIA) is employed to investigate coupling dynamics between (In,Ga)As QDs and a high-Q (~7000) resonator with ultrafast time resolution (150 fs), below and above the lasing threshold at T = 5 K. For QDs…

介观与纳米尺度物理 · 物理学 2009-11-07 D. K. Young , L. Zhang , D. D. Awschalom , E. L. Hu

Reactive species produced by atmospheric pressure plasma jets have high application potential in the fields of biomedicine and surface processing. An extensive validation between the simulation results in this work and measurement data from…

等离子体物理 · 物理学 2025-05-22 Youfan He , Ralf Peter Brinkmann , Efe Kemaneci , Andrew R. Gibson

In future 6G networks, anti-jamming will become a critical challenge, particularly with the development of intelligent jammers that can initiate malicious interference, posing a significant security threat to communication transmission.…

信号处理 · 电气工程与系统科学 2024-09-24 Yue Xiu , Yang Zhao , Songjie Yang , Minrui Xu , Dusit Niyato , Yueyang Li , Ning Wei

We propose a new method for testing antenna arrays that records the radiating electromagnetic (EM) field using an absorbing material and evaluating the resulting thermal image series through an AI using a conditional encoder-decoder model.…

机器学习 · 计算机科学 2021-11-30 Hans Hao-Hsun Hsu , Jiawen Xu , Ravi Sama , Matthias Kovatsch

The spatial and temporal evolutions of blue-core helicon discharge driven by a planar antenna with four concentric rings are explored on the Linear Experimental Advanced Device (LEAD). The discharge experiences distinct density jumps from E…

In many discharges at ASDEX Upgrade fast particle losses can be observed due to Alfv\'enic gap modes, Reversed Shear Alfv\'en Eigenmodes or core-localized Beta Alfv\'en Eigenmodes. For the first time, simulations of experimental conditions…

Local Alfven wave (LAW) resonances are excited in tokamak plasmas by an externally driven electro-magnetic field, with the frequency below the ion cyclotron frequency, where using of the Alfven waves is assumed. Recently, wave driven…

等离子体物理 · 物理学 2007-05-23 Artur Elfimov , Ricardo Galvao , Leonid Ruchko , Maria Emilia Manso

We study amplified spontaneous emission (ASE) from wavelength-scale composite bodies--complicated arrangements of active and passive media--demonstrating highly directional and tunable radiation patterns, depending strongly on pump…

介观与纳米尺度物理 · 物理学 2016-03-29 Weiliang Jin , Chinmay Khandekar , Adi Pick , Athanasios G. Polimeridis , Alejandro W. Rodriguez

The plasma response to Resonant Magnetic Perturbations (RMPs) in ASDEX Upgrade is modeled with the non-linear resistive MHD code JOREK, using input profiles that match those of the experiments as closely as possible. The RMP configuration…