Results 61 to 70 of about 69,883 (320)

Biological and Biologically Inspired Functional Nanostructures: Insights into Structural, Optical, Thermal, and Sensing Applications

Advanced Materials, EarlyView.
Biological and biologically‐inspired functional nanostructures with structural, thermal, optical, and sensing applications are reviewed. The role of nanoscale features in biological materials on performance is described, and their blueprints are used for bio‐inspired nanomaterials, synthesized using advanced techniques (i.e., photolithography, bio ...
Chao Hsuan (Joseph) Sung, Taige Hao, Herry Fang, Andrew Tran Nguyen, Valentina Perricone, Haitao Yu, Wei Huang, Ezra Sarmiento, Adrian Francisco Duran Ornelas, Derek Lublin, Ric Wehling, Sanaz Farajollahi, Atsushi Arakaki, Dhriti Nepal, Nathan Patrick Lord, David Kisailus   +15 more
wiley   +1 more source

Advancing Mechano‐Bactericidal Surfaces: Mechanisms, Fabrication, and Synergistic Antimicrobial Strategies

Advanced Materials Interfaces, EarlyView.
This review provides a detailed introduction to the fabrication and modulation of nanostructured mechano‐bactericidal surfaces and emphasizes integration of photoactive materials, chemical biocides, stimuli‐responsive self‐cleaning coatings, and electro‐mediated strategies to achieve multifunctional and synergistic antimicrobial effects, providing ...
Yiwen Zhong, Yitong Li, Yang Fu, Zhenfang Zhang, Han Lin, Haiyan Li, Xiao‐Bo Chen, Tianyi Ma, Baohua Jia   +8 more
wiley   +1 more source

Auto-detection of strong gravitational lenses using convolutional neural networks

Emergent Scientist, 2018
We propose a method for the automated detection of strong galaxy-galaxy gravitational lenses in images, utilising a convolutional neural network (CNN) trained on 210 000 simulated galaxy-galaxy lens and non-lens images.
Pearson James, Pennock Clara, Robinson Tom   +2 more
doaj   +1 more source

Lensing Magnification Seen by Gravitational Wave Detectors

Universe, 2021
In this paper, we studied the gravitational lensing of gravitational wave events. The probability that an observed gravitational wave source has been (de-)amplified by a given amount is a detector-dependent quantity which depends on different ingredients:
Giulia Cusin, Ruth Durrer, Irina Dvorkin
doaj   +1 more source

Perturbative Approach to the Gravitational Lensing by a Non-spherically Distorted Compact Object

, 2011
We investigate the gravitational lens effect caused by a non-spherically distorted compact object. The non-spherical property of the gravitational potential is modeled by a quadrupole moment. Under the assumption that the quadrupole contribution is small,
Alard, Alard, Alard, Amano Saijo, Asada, Asada, Asada, Baraldo, Ebina, Ibanez, Konno, Mao, Masumi Kasai, Sari, Schneider   +14 more
core   +1 more source

Cloaking and Antennas: From Theoretical Paradigms to Next‐Generation Intelligent Systems

Advanced Optical Materials, EarlyView.
The inception of electromagnetic cloaking sparked an immediate question: Can antennas be made invisible? Two decades later, this review charts the intertwined progress of major cloaking strategies (from transformation optics to scattering cancellation), metasurface technology, and their application to antennas, revealing how AI‐enabled devices are ...
Helen Guo, Xun Li
wiley   +1 more source

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research
The celebrated theory of general relativity has inspired research on optical simulations using artificial microstructures to mimic curved space–times.
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
doaj   +1 more source

The quadrupole gravitational lens

The Astrophysical Journal, 1987
An asymmetric lens made of a spherically symmetric galaxy and a quadrupole tidal part allows a very simple pictorial examination of the multiplicity and positions of the images, for any mass density profile. The lens equations can be reduced to one equation in one variable.
openaire   +2 more sources

Anisotropic Second‐ and Third‐Harmonic Hermite–Gaussian Beam Generation with NbOI2 Holograms

Advanced Photonics Research, EarlyView.
Anisotropic second‐ and third‐harmonic Hermite–Gaussian (HG) beam generation is demonstrated with ultrathin NbOI2 grating holograms to produce the nonlinear HG01 and HG10 modes with high anisotropy ratios. The relative magnitudes of the second‐ and third‐order nonlinear susceptibility tensor elements of NbOI2 crystal are extracted. These demonstrations
Jayanta Deka, Jie Gao, Xiaodong Yang
wiley   +1 more source

Exploring Quantum Geometry Created by Quantum Matter

Physics, 2022
Exactly soluble models can serve as excellent tools to explore conceptual issues in non-perturbative quantum gravity. In perturbative approaches, it is only the two radiative modes of the linearized gravitational field that are quantized.
Abhay Ashtekar
doaj   +1 more source