Results 91 to 100 of about 40,593 (282)

ωk algorithm for multi-receiver synthetic aperture sonar based on exact analytical two-dimensional spectrum

The Journal of Engineering, 2019
Based on the method of deriving two-dimensional wavenumber spectrum by using instantaneous Doppler wavenumber in bistatic synthetic aperture radar, the analytical solution of two-dimensional wavenumber spectrum of multi-receiver synthetic aperture sonar (
Jinbo Wang, Jinsong Tang, Zhen Tian
doaj   +1 more source

External Reflection From Two‐Photon Laser‐Printed Micromirrors Enables Photomechanical Actuation at a 90° Incident Angle

Advanced Functional Materials, EarlyView.
Light reflectance increases along incidence angle and transmittance significantly drops around 90‐degree incidence angle. Here, we report two‐photon laser printed micro mirrors that redirect the skimming light beam into normal light absorption. Using this technique, light‐driven micro walkers and grippers are demonstrated by using grazing incidence ...
Leilei Song, Jianfeng Yang, Hao Zeng
wiley   +1 more source

Quantum dynamics of local phase differences between reservoirs of driven interacting bosons separated by simple aperture arrays

, 2013
We present a derivation of the effective action for the relative phase of driven, aperture-coupled reservoirs of weakly-interacting condensed bosons from a (3+1)-D microscopic model with local U(1) gauge symmetry. We show that inclusion of local chemical
Backhaus S, Balakrishnan R, Bekarevitch I L, Bendt P J, de Gennes P G, Devoret M, Devoret M H Wallraff A Martinis J M, Henderson K, K B Whaley, Khalatnikov I M, Kleinert H, Korsbakken J, Kwon Y Volkoff T Whaley K B, Manucharyan V E Masluk N A Kamal A Koch J Glazman L I Devoret M H, Negele J W, Pethick C J, Sato Y, T J Volkoff, Tinkham M, Wen X-G   +19 more
core   +1 more source

Novel Functional Materials via 3D Printing by Vat Photopolymerization

Advanced Functional Materials, EarlyView.
This Perspective systematically analyzes strategies for incorporating functionalities into 3D‐printed materials via Vat Photopolymerization (VP). It explores the spectrum of achievable functionalities in recently reported novel materials—such as conductive, energy‐storing, biodegradable, stimuli‐responsive, self‐healing, shape‐memory, biomaterials, and
Sergey S. Nechausov, Patrick Fesser, Boris A. Bulgakov, Ulrich S. Schubert   +3 more
wiley   +1 more source

The statistics of the photometric accuracy based on MASS data and the evaluation of high-altitude wind

, 2010
The effect of stellar scintillation on the accuracy of photometric measurements is analyzed. We obtain a convenient form of estimaton of this effect in the long exposure regime, when the turbulence shift produced by the wind is much larger than the ...
A. T. Young, A. Tokovinin, A. Tokovinin, D. Dravins, D. Dravins, D. Dravins, F. Roddier, G. I. Taylor, H. M. Martin, H. Struve, M. Abramowitz, S. L. Kenyon, V. G. Kornilov, V. Kornilov, V. Kornilov, V. Kornilov   +15 more
core   +1 more source

Self‐Hybridized Exciton‐Polariton Photodetectors From Layered Metal‐Organic Chalcogenolates

Advanced Functional Materials, EarlyView.
Self‐hybridized exciton‐polariton photodetectors are demonstrated using high refractive index mithrene, eliminating the need for top mirrors. This simplified architecture enables tunable sub‐bandgap photodetection via lower exciton‐polariton states and enhanced carrier transport through ultrafast polariton group velocities.
Bongjun Choi, Adam D. Alfieri, Wangleong Chen, Deep Jariwala   +3 more
wiley   +1 more source

Multi-Aperture Joint-Encoding Fourier Ptychography for a Distributed System

Remote Sensing
High-resolution infrared remote sensing imaging is critical in planetary exploration, especially under demanding engineering conditions. However, due to diffraction, the spatial resolution of conventional methods is relatively low, and the spatial ...
Tianyu Wang, Meng Xiang, Fei Liu, Jinpeng Liu, Xue Dong, Sen Wang, Gang Li, Xiaopeng Shao   +7 more
doaj   +1 more source

Metal–Organic Frameworks for Gaseous Pollutant Management: From Capture to Neutralization and Reutilization

Advanced Functional Materials, EarlyView.
This review maps how MOFs can manage hazardous gases by combining adsorption, neutralization, and reutilization, enabling sustainable air‐pollution control. Covering chemical warfare agent simulants, SO2, NOx, NH3, H2S, and volatile organic compounds, it highlights structure‐guided strategies that boost selectivity, water tolerance, and cycling ...
Yuanmeng Tian, Zeyu Tao, Kaikai Ma, Xiaoliang Wang, Bo Yu, Yiu Wan Yip, Zhijie Chen, Jin Shang, Bin Fei   +8 more
wiley   +1 more source

Extragalactic infrared spectroscopy [PDF]

The spectra of galaxies in the near infrared atmospheric transmission windows are explored. Emission lines were detected due to molecular hydrogen, atomic hydrogen recombination lines, a line attributed to FEII, and a broad CO absorption feature.
Gatley, I., Graham, J. R., Joseph, R. D., Prestwich, A. H., Wade, R., Wright, G. S.   +5 more
core   +1 more source

Bistatic multi‐polarimetric synthetic aperture radar coherence investigation using spatially variant incoherence trimming

IET Radar, Sonar & Navigation
Synthetic Aperture Radar (SAR) Coherent Change Detection allows for the detection of very small scene changes. This is particularly useful for Intelligence, Surveillance and Reconnaissance as small changes such as vehicle tracks can be identified ...
Alexander Hagelberg, Daniel Andre, Mark Finnis   +2 more
doaj   +1 more source