Results 141 to 150 of about 1,806 (250)

Optically Transparent Ka‐Band Absorber With Multi‐Fractal Rings and a Metal Mesh Ground Plane

Microwave and Optical Technology Letters, Volume 68, Issue 6, June 2026.
ABSTRACT An optically transparent absorber based on multi‐fractal ring resonators and a metal mesh ground plane is presented for Ka‐band applications. By merging multiple resonances, the proposed absorber maintains an absorption bandwidth from 25.8 to 31.1 GHz.
Junseong Bae, Seoyeong Min, Suho Chang, Daehyeon Kim, Donggeun An, Wonbin Hong, Youngno Youn   +6 more
wiley   +1 more source

Compatible Stealth for Infrared and Radar Bands: Mechanisms, Materials, and Design Strategies

Small Science, Volume 6, Issue 6, June 2026.
Developing infrared/radar compatible stealth materials poses significant challenges due to the conflicts in their internal mechanisms. This review provides a detailed account of the design principles, methods, and latest research advances in infrared/radar compatible stealth materials.
Junfeng Fu, Yi Liang, Wei Cai, Hongjing Wu, Youan Xu   +4 more
wiley   +1 more source

Grain Size and Fluid Effects on the Frictional Behavior of Simulated Carbonate Fault Gouge

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract Carbonate rocks exhibit a span of clast and grain size in fault zones. However, the effect of grain size distribution on the frictional behavior of carbonate faults and its implications for natural and induced seismicity remain poorly understood.
Entela Kane, Anne M. H. Pluymakers, André R. Niemeijer   +2 more
wiley   +1 more source

Modeling of Inscribed Dual Band Circular Fractal Antenna for Wi‐Fi Application Using Descartes Circle Theorem

Engineering Reports
This study focuses on the modeling of a dual‐band circular fractal antenna designed for Wi‐Fi applications by utilizing the Descartes Circle Theorem. The antenna's geometry is characterized by self‐similar fractal patterns, enabling enhanced performance ...
SatheeshKumar Palanisamy, Anitha R. Vaddinuri, Arfat Ahmad Khan, Muhammad Faheem   +3 more
doaj   +1 more source

Fractal Multiband Antennas Based On Polygons

, 2003
A general procedure for the construction of new fractal multiband antennas is presented along with results for the pentagonal design. An increasing frequency ratio is found with an increase in the number of sides of the polygon used to construct the ...
Wahid, Parveen F., Tang, Philip W.
core  

Design and Analysis of Fractal antennas [PDF]

, 2015
This report contains design proposals of three antennas with completely different functionalities. All of the three employ the concept of fractal geometry is designing compact antennas with better performance than Microstrip Patch antennas (MPAs ...
Badajena, Shakti Prasad
core  

Unstable Weak Imbibition in Fractured Porous Media: Microfluidic and Theoretical Insights

Water Resources Research, Volume 62, Issue 6, June 2026.
Abstract Weak imbibition in permeable media is crucial for CO2 geological sequestration, oil and gas extraction, and groundwater contamination and remediation. Previous studies predicted that weak imbibition under favorable viscosity ratios produces stable displacement, but this assumption may fail in fractured porous media.
Zhengwen Zhu, Ran Hu, Tian Lan, Zhibing Yang, Yi‐Feng Chen   +4 more
wiley   +1 more source

Modeling small‐angle scattering data of porous and/or bicontinuous structures in n dimensions

Journal of Applied Crystallography, Volume 59, Issue 3, Page 837-844, June 2026.
A small‐angle scattering fitting function is derived for porous materials with arbitrary fractal dimension. It includes a correlation peak and a power law at higher q.Fractal structures are often observed in small‐angle scattering experiments where a simple power law q−α describes the scattering intensity over many orders of magnitude.
Henrich Frielinghaus
wiley   +1 more source

The Evolving Landscape of Clinical Aging Clocks: From Epigenetic to Multi‐Omics Integration

Aging Cell, Volume 25, Issue 6, June 2026.
Multi‐omics aging clocks capture biological heterogeneity beyond single‐omics models, improving risk stratification. Key challenges include unknown biological meaning, timescale mismatches, and validation gaps. Future clocks must distinguish pathological damage from adaptive remodeling—damage accumulation is the most actionable target for anti‐aging ...
Liying Liu, Yuanyuan Lai, Chunhui Tian, Yufei Huang, Jianheng Hao, Yuemeng Zhao, Dan Chen, Tianyu Wu, Daqian Zhou, Xiaoyan Zheng, Han Yang, Zheng Yu, Nihong Li, Jie Yang   +13 more
wiley   +1 more source

Modern microbial landscape: Aerial mapping of microbially induced sedimentary structures forming in a coastal sabkha

Sedimentology, Volume 73, Issue 4, Page 1286-1306, June 2026.
ABSTRACT Microbially induced sedimentary structures (MISS) are considered important for understanding primitive life on Earth and for guiding the search for life on other planets. These structures are regarded as macroscopic fossils of early communities of unicellular organisms that did not produce skeletons or shells. In this study, field observations
Tomaso R. R. Bontognali, Axel Bouquety, Ottaviano Rüsch, Brigitte Kuhn, Zulfa Al Disi, Fadhil Sadooni, Nikolaus Kuhn, Jean‐Luc Josset, Hamad Al‐Saad Al‐Kuwari   +8 more
wiley   +1 more source