Results 61 to 70 of about 411 (163)

Whistler‐Mode Waves in the Density Double Ducts

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract We report the recent observation of a density duct structure in the equatorial plasmasphere, identified using data from the NASA Van Allen Probes (RBSP). The structure consists of a low‐density duct located above a high‐density duct, forming a “double duct” system capable of simultaneously trapping and guiding multiple whistler‐mode waves at ...
Salman A. Nejad, Anatoly V. Streltsov
wiley   +1 more source

Ultra-Wideband Robust RCS Reduction with Triangle-type AMC Structure [PDF]

Radioengineering, 2018
A novel planar artificial magnetic conductor (AMC) structure is presented for ultra-wideband radar cross section reduction (RCSR). The structure consists of three different AMC tiles in a quadruple triangle-type chessboard configuration.
T. Song, L. L. Cong, C. M. Tong
doaj  

Iterative Data Curation for Machine Learning‐Based Inverse Design of Active Composite Plates for Four‐Dimensional Printing

Advanced Intelligent Systems, Volume 8, Issue 2, February 2026.
A machine learning framework is developed for the inverse design of 4D‐printed active composite plates. It utilizes a forward model to predict shapes from patterns and an inverse model to suggest initial patterns for desired shapes. This framework integrates a genetic algorithm to refine the predicted patterns, ensuring higher accuracy in achieving ...
Teerapong Poltue, Chao Zhang, Frédéric Demoly, Kun Zhou, H. Jerry Qi   +4 more
wiley   +1 more source

Novel Roles for the Ectoenzyme CD38 in the Maintenance of Transcriptional and Metabolic Homeostasis in Astrocytes

Glia, Volume 74, Issue 2, February 2026.
CD38 deficiency influences brain NAD/NAM metabolism. Global CD38 deficiency drives changes in astrocyte mitochondrial, metabolic, senescence, and neurodegenerative‐related genes. CD38 deficiency alters glial reactivity and astrocyte bioenergetics. ABSTRACT CD38 is an ectoenzyme that converts NAD+ to NAM to help maintain bioenergetic homeostasis.
S. Basak, A. M. Colafrancesco, R. D. Hernandez, X. Wei, L. J. McMeekin, D. Dang, M. Simmons, J. L. Browning, K. Noel, F. Zhou, F. E. Lund, J. S. Saad, S. G. Watsen, A. M. Pickrell, R. M. Cowell, M. L. Olsen   +15 more
wiley   +1 more source

Height Reduction of Circular and Linearly Polarized Magneto-electric Dipole Antenna through Artificial Magnetic Conductor [PDF]

علوم، فناوری و کاربردهای فضایی
In this article, a solution for reducing the height of magneto-electric dipole antennas is presented by using an artificial magnetic conductor structure as the antenna's ground plane.
mohammadhossein ashouri, saeed fakhte, IMAN ARYANIAN   +2 more
doaj   +1 more source

Self‐Healing Materials from Electronically Integrated Microscopic Robots

Advanced Intelligent Systems, Volume 8, Issue 1, January 2026.
Submillimeter robots can use electronically controlled electrodeposition to assemble into a material structure. The resulting aggregate possesses ultralow density, high strength‐to‐weight ratio, and can heal from damage. Further afield, these results clear a path to materials that organize or adapt by directing matter and information at the microscale.
Lucas C. Hanson, William H. Reinhardt, Marc Z. Miskin   +2 more
wiley   +1 more source

A Wideband Wearable Antenna with AMC Ground Plane for WBAN Applications [PDF]

Radioengineering, 2022
A flexible wearable antenna with wideband characteristics and having a conical radiation pattern which is suitable for ON body application is presented. To realize a compact antenna size, characteristic modal (CM) analysis is performed initially, and the
S. Bhattacharjee, M. Midya, S. R. Bhadra Chaudhuri, M. Mitra   +3 more
doaj  

AMC surface based on spiral strips and its applications for low‐profile broadband planar antennas

IET Microwaves, Antennas & Propagation, 2019
A novel artificial magnetic conductor (AMC) surface based on spiral strips is proposed, which consists of 9 × 9 AMC cells. Each AMC cell includes a spiral strip to increase its inductance, thus featuring a wide bandwidth of 42% for ±90° reflection phase.
RongLin Li, Yue Qin, Fuyun Li, Linjuan Wu, Yuehui Cui   +4 more
doaj   +1 more source

Tunable artificial magnetic conductor ground for multiple functions: Antenna bandwidth enhancement, low scattering, and low-profile performance

AIP Advances
In this article, an innovative method to improve antenna radiation and scattering performance is proposed and demonstrated. By utilizing a tunable artificial magnetic conductor (AMC) as the antenna ground plane, multiple functions can be realized ...
C. Zhang, L. Ni, S. J. Li, H. H. Yang, T. Li, X. Y. Cao   +5 more
doaj   +1 more source

Radiation Improvement of Low-Profile Microstrip Antenna by Utilizing AMC Surface for MIMO and Wireless Systems [PDF]

International Journal of Industrial Electronics, Control and Optimization
A compact microstrip antenna by applying a parasitic artificial magnetic conductor (AMC), is proposed for facilitating 4G and 5G wireless communications. The antenna design includes microstrip dipoles fed by a T-shaped feedline.
Hosein Malekpoor, Mehdi Hamidkhani
doaj   +1 more source