Results 91 to 100 of about 83,839 (349)

Dark matter kinetic decoupling with a light particle

, 2017
We argue that the acoustic damping of the matter power spectrum is not a generic feature of the kinetic decoupling of dark matter, but even the enhancement can be realized depending on the nature of the kinetic decoupling when compared to that in the ...
Kamada, Ayuki, Takahashi, Tomo
core   +1 more source

Moth‐Wing‐Inspired Multifunctional Metamaterials

Advanced Materials, EarlyView.
This study develops a moth‐wing‐inspired heterogeneous metamaterial that achieves synergistic broadband sound absorption, mechanical energy dissipation, and thermal insulation within a lightweight architected framework. Combining bioinspired gradient design, genetic‐algorithm optimization, and additive manufacturing, the bionic heterogeneous acoustic ...
Haoran Pei, Hang Yang, Ning Zhang, Tian Li, Xinxin Wang, Miao Zhao, Shuwei Ding, Xin Wang, Qinniu Lv, Zijie Xu, Yinghong Chen, Xinwei Li, Wei Zhai   +12 more
wiley   +1 more source

Design of Resilient Wide-Area Damping Controllers Using a Modified Sine Cosine Algorithm

IEEE Access
The expansion of power systems due to increased demand and new generation sources has created operational challenges and compromised the continuous supply of electricity.
Henrique R. De Almeida, Murilo E. C. Bento   +1 more
doaj   +1 more source

Adaptive Coordination of Damping Controllers for Enhanced Power System Stability

IEEE Open Access Journal of Power and Energy, 2020
This paper introduces the concept of adaptive coordination of damping controllers for enhancing power system stability. The coordination uses phasor measurement units (PMUs) to adapt to different disturbances by selecting the switching status (on/off) of
Horacio Silva-Saravia, Hector Pulgar-Painemal, David A. Schoenwald, Wenyun Ju   +3 more
doaj   +1 more source

Handed Magnon Propagation in Easy‐Axis Antiferromagnetic α‐Fe2O3

Advanced Materials, EarlyView.
Coherent excitation and detection of handed magnons are achieved in the easy‐axis antiferromagnet α‐Fe2O3. An external magnetic field lifts the degeneracy between left‐ and right‐handed magnons without affecting their propagation velocity. The Dzyaloshinskii–Moriya interaction and anisotropy modulate their amplitude and damping, enabling intrinsic ...
Chang Xu, Hanbum Park, Chenhui Zhang, Hyunsoo Yang   +3 more
wiley   +1 more source

Power oscillation damping controller

, 2012
A power oscillation damping controller is provided for a power generation device such as a wind turbine device. The power oscillation damping controller receives an oscillation indicating signal indicative of a power oscillation in an electricity network and provides an oscillation damping control signal in response to the oscillation indicating signal,
Knüppel, Thyge, Sathees, Kumar, Thuring, Patrik   +2 more
openaire   +1 more source

Soft Electromagnetic Actuator and Oscillator

Advanced Materials Technologies, Volume 10, Issue 6, March 18, 2025.
This work presents a groundbreaking soft electromagnetic system capable of bistable actuation and self‐regulated oscillation. Using liquid metal and silicone as a compliant conductor, the actuator enables force generation, sensing, and feedback with minimal power.
Noah D. Kohls, Yi Chen Mazumdar
wiley   +1 more source

Using Effective Generator Impedance for Forced Oscillation Source Location

, 2018
Locating the sources of forced low-frequency oscillations in power systems is an important problem. A number of proposed methods demonstrate their practical usefulness, but many of them rely on strong modeling assumptions and provide poor performance in ...
Chevalier, Samuel, Turitsyn, Konstantin, Vorobev, Petr   +2 more
core   +1 more source

Roadmap to Precision 3D Printing of Cellulose: Rheology‐Guided Formulation, Fidelity Assessment, and Application Horizons

Advanced Materials Technologies, EarlyView.
This critical review presents a comprehensive roadmap for the precision 3D printing of cellulose. Quantitative correlations link ink formulation and rheological properties to print fidelity and final material performance. This framework guides the development of advanced functional materials, from biomedical scaffolds to electromagnetic shielding ...
Majed Amini, Hadi Hosseini, Seyyed Alireza Hashemi, Mohammad Arjmand   +3 more
wiley   +1 more source

Grand-mother clocks and quiet lasers

, 2009
Galileo noted in the 16th century that the period of oscillation of a pendulum is almost independent of the amplitude. However, such a pendulum is damped by air friction.
Arnaud, Jacques, Chusseau, Laurent, Philippe, Fabrice   +2 more
core   +1 more source