Results 111 to 120 of about 78,915 (301)

A Sinusoidal Current Driver With an Extended Frequency Range and Multifrequency Operation for Bioimpedance Applications [PDF]

, 2014
This paper describes an alternative sinusoidal current driver suitable for bioimpedance applications where high frequency operation is required. The circuit is based on a transconductor and provides current outputs with low phase error for frequencies ...
Demosthenous, A, Langlois, PJ, Neshatvar, N   +2 more
core   +1 more source

Observation of Klein bottle quadrupole topological insulators in electric circuits

Journal of Applied Physics
The Klein bottle insulator phase plays a pivotal role in understanding higher-order topological phases. The insulator phase is characterized by a unique feature: A nonsymmorphic glide symmetry that exists within momentum space, rather than real space.
Xizhou Shen, Keyu Pan, Xiumei Wang, Xingping Zhou   +3 more
openaire   +2 more sources

Quadrupole topological phase and robust corner resonance in Kekulé hexagonal electric circuit

New Journal of Physics, 2020
Abstract Two-dimensional (2D) quadrupole topological insulators, featured by topologically protected 0D corner modes, have recently attracted tremendous interest in condensed matter and materials physics. Herein, we construct a specific electric circuit made of capacitors and inductors forming a 2D Kekulé hexagonal lattice for quadrupole
Junjie Yao, Xiamin Hao, Fangxue Luo, Yizhen Jia, Miao Zhou   +4 more
openaire   +2 more sources

Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain

Advanced Materials, EarlyView.
A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha, Bilguun Nurzed, Mostafa Berangi, Andre Kuehne, Helmar Waiczies, Igor Fabian Tellez Ceja, Xiang Hu, Thomas Gladytz, Lisa Krenz, Dave Huebler, Beate Endemann, Claudia Brockmann, Ebba Beller, Oliver Stachs, Thoralf Niendorf   +14 more
wiley   +1 more source

A Framework for Data-Driven Simulation of Electrical Circuits Based on Discrete-Continuous Optimization

IEEE Access
In this work, we present and investigate a new framework for the data-driven simulation of electrical circuits based on discrete-continuous optimization. For such an end, we provide a formal derivation of the data-driven discrete forward-dynamics problem
Cristian G. Gebhardt, Bruno A. Roccia, Jose M. Bossio, Guillermo R. Bossio   +3 more
doaj   +1 more source

A Multifunctional Isolated and Non-Isolated Dual Mode Converter for Renewable Energy Conversion Applications

Energies, 2017
In this paper, a multifunctional isolated and non-isolated dual-mode low-power converter was designed for renewable energy conversion applications such as photovoltaic power generation to achieve different operating modes under bi-directional electrical ...
Yiwang Wang, Chun Gan, Kai Ni, Xinhua Li, Houjun Tang, Yong Yang   +5 more
doaj   +1 more source

Large‐Area 2D Metasurface‐Based Triboelectric E‐Skin Arrays: Contact & Proximity Tactile Mapping with Broadband Acoustic Readouts

Advanced Materials, EarlyView.
Metasurface‐engineered NC‐TENG arrays integrate tactile pressure mapping, non‐contact gesture sensing, and acoustic signal readouts in one ultrathin module, and outperforms pristine PDMS in terms of electrical output and real‐time spatial mapping for next‐gen wearables.
Injamamul Arief, Swagato Sarkar, Anik Kumar Ghosh, Osvalds Verners, Kamal Kumar Meena, Su‐Hyeong Lee, Soosang Chae, Tobias A. F. König, Beate Krause, Andreas Fery, Mehmet Sait Özer, Anindya Nag, Amit Das   +12 more
wiley   +1 more source

Topological defect engineering and PT-symmetry in non-Hermitian electrical circuits

, 2020
4 pages, 3 figures, 6 pages supplement (separate file)
Stegmaier, Alexander, Imhof, Stefan, Helbig, Tobias, Hofmann, Tobias, Lee, Ching Hua, Kremer, Mark, Fritzsche, Alexander, Feichtner, Thorsten, Klembt, Sebastian, Höfling, Sven, Boettcher, Igor, Fulga, Ion Cosma, Schmidt, Oliver G., Greiter, Martin, Kiessling, Tobias, Szameit, Alexander, Thomale, Ronny   +16 more
openaire   +2 more sources

Data‐Driven Discovery of Quaternary Ammonium Interlayers for Efficient and Thermally Stable Perovskite Solar Cells

Advanced Materials, EarlyView.
An active learning framework, grounded in independently generated in‐house experimental data, enables reliable discovery of high‐performance interfacial materials for perovskite solar cells. Iterative model refinement autonomously converges toward structurally robust quaternary ammonium architectures, establishing a new design principle for interfacial
Jongbeom Kim, Yang Jeong Park, Chaehoon Jeon, Nahye Shin, Jaewang Park, Seungun Lee, Jino Im, Sungroh Yoon, Sang Il Seok   +8 more
wiley   +1 more source

Recent Advances in Electrospun Nanofibers for Triboelectric Nanogenerators: Performance Enhancement Strategies and Emerging Applications

Advanced Materials, EarlyView.
This review highlights recent advances in electrospun nanofiber‐based triboelectric nanogenerators, emphasizing how material design, fiber architecture, and interface engineering collectively enhance output performance and mechanical durability. Key developments in porous, aligned, core‐shell, and hierarchical nanofibers are discussed alongside ...
MD Fajla Rabbi, Jee Hwan Ahn, Duy Linh Vu, Kyoung Kwan Ahn   +3 more
wiley   +1 more source