Results 91 to 100 of about 104,312 (252)

SAR Data and Harvesting Residues: An Initial Assessment of Estimation Potential

Earth
The increasing demand for large-scale, high-frequency environmental monitoring has driven the adoption of satellite-based technologies for effective forest management, especially in the context of climate change.
Alberto Udali, Henrik J. Persson, Bruce Talbot, Stefano Grigolato   +3 more
doaj   +1 more source

3-D Imaging Systems for Agricultural Applications—A Review

Sensors, 2016
Efficiency increase of resources through automation of agriculture requires more information about the production process, as well as process and machinery status. Sensors are necessary for monitoring the status and condition of production by recognizing
Manuel Vázquez-Arellano, Hans W. Griepentrog, David Reiser, Dimitris S. Paraforos   +3 more
doaj   +1 more source

Pyrolyzed Photoresist as a Continuous‐Tone Mask for Grayscale Lithography

Advanced Science, EarlyView.
True grayscale contact photolithography masks are created by pyrolysis of 3D multiphoton resist patterns. The resulting carbon masks retain micrometer‐scale patterned features while providing continuous‐tone optical transmission. This approach provides access to high‐quality grayscale lithography without requiring exotic materials or commercial mask ...
Tielyr D. Creason, Gavin C. Gee, Zachary T. Piontkowski, Toai Ton‐That, Robert Reyna, Edward R. Arata, Mason Risley, Jacob D. Boissiere, Bryan Kaehr, D. Bruce Burckel   +9 more
wiley   +1 more source

Interference Measurements Across Vacuum and Atmospheric Environments for Characterization of Space-Borne Telescope

Photonics
A space-borne telescope is used for Earth observation at about 500 km above sea level in the thermosphere where the air density is very low and the temperature increases significantly during daytime. If the telescopes are aligned and characterized on the
Yi-Kai Huang, Cheng-Huan Chen
doaj   +1 more source

SURE-Fuse WFF: A Multi-Resolution Windowed Fourier Analysis for Interferometric Phase Denoising

IEEE Access, 2019
Interferometric phase (InPhase) images, acquired by phase imaging systems, often suffer from two major degradations: 1) phase wrapping, caused by the sinusoidal 2π-periodic sensing mechanism, and 2) noise, introduced by the acquisition process or ...
Joshin P. Krishnan, Mario A. T. Figueiredo, Jose M. Bioucas-Dias   +2 more
doaj   +1 more source

Learning Adaptive Filtering in the Fourier Domain for Fringe Pattern Analysis: A New Reconstruction Paradigm in Digital Holographic Interferometry. [PDF]

Nanophotonics
The object beam and the reference beam interfere at the camera sensor surface and multi‐angle tomographic recording based on off‐axis digital holography. ABSTRACT Single‐frame fringe pattern analysis in digital holographic interferometry (DHI) is essential for precision phase measurement under dynamic conditions. Recent advances in deep learning within
Li Y, Meng L, Xu Z, Li H, Zhang K, Xie Y, Yuan L.   +6 more
europepmc   +2 more sources

Contact‐Free Human‐Machine Interfaces via Printed Thermopile Infrared Arrays

Advanced Science, EarlyView.
Can a printed sheet locate and sense a fingertip without being touched? Fully printed, flexible thermoelectric arrays convert the infrared from a hovering finger directly into voltage, with no external power. Aerosol‐jet‐printed silver mirrors partially shield each pixel, creating a local temperature gradient.
Zirui Wang, Nan Luo, Amrutha Bose, Muhammad Irfan Khan, Jiayi Liu, Leon Viktor Klinder, Leonard Franke, Mohamed Hussein, Uli Lemmer, Md Mofasser Mallick   +9 more
wiley   +1 more source

Interferometry of ionospheric E-region irregularities based on Kunming VHF radars

Frontiers in Astronomy and Space Sciences
There is a long history of using VHF radar systems to detect ionospheric irregularities based on the theory of coherent scattering. According to previous work, there is a high occurrence of field-aligned irregularities (FAIs) in the ionospheric E-region ...
Bo Chen, Yihao Xu, Chen Zhou, Yuqiang Zhang, Yi Liu, Tong Xu, Bin Xu, Jian Feng, Ting Lan, Haiyin Qing, Zhongxin Deng, Xiang Wang, Xiang Wang, Xinmiao Zhang   +13 more
doaj   +1 more source

Measuring Coseismic Deformation With Spaceborne Synthetic Aperture Radar: A Review

Frontiers in Earth Science, 2019
In the past 25 years, space-borne Synthetic Aperture Radar imagery has become an increasingly available data source for the study of crustal deformation associated with moderate to large earthquakes (M > 4.0).
John Peter Merryman Boncori
doaj   +1 more source

Al1−xHfxN$\text{Al$_{1-x}$Hf$_{x}$N}$ Thin Films with Enhanced Piezoelectric Responses for GHz Surface Acoustic Wave Devices

Advanced Electronic Materials, EarlyView.
Reactively sputtered wurtzite Al1‐xHfxN thin films, exhibiting strong c‐axis texture and enhanced piezoelectric response, are demonstrated as a cost‐effective alternative to Al1‐xScxN. X‐ray absorption spectroscopy reveals that cross‐gap N 2p–Hf 5d hybridization increases the Born effective charge and enables a multifold increase in piezoelectric ...
Laura I. Wagner, Verena Streibel, Esperanza Luna, Katarina S. Flashar, Valentin Walbrunn, Walid Anders, Nicole Volkmer, Doreen Steffen, Katrin Morgenroth, Frans Munnik, Tsedenia A. Zewdie, Saswati Santra, Jutta Schwarzkopf, Ian D. Sharp, Mingyun Yuan   +14 more
wiley   +1 more source