Results 101 to 110 of about 41,432 (298)

An Off-Axis Catadioptric Division of Aperture Optical System for Multi-Channel Infrared Imaging

Photonics
Multi-channel optical systems can provide more feature information compared to single-channel systems, making them valuable for optical remote sensing, target identification, and other applications.
Jie Chen, Tong Yang, Hongbo Xie, Lei Yang   +3 more
doaj   +1 more source

Increased Endurance of Nonvolatile Photonics Enabled by Nanostructured Phase‐Change Materials

Advanced Materials, EarlyView.
Tapered and segmented islands of the phase‐change material (PCM) antimony selenide (Sb2Se3) integrated on silicon microring resonators enable ultra‐low‐loss, high‐endurance, non‐volatile photonic tuning. The nanostructured PCM design suppresses interfacial scattering and thermal stress, achieving record endurance over 100 million electrical switching ...
Jayita Dutta, Andrew Tang, Brian Mills, Rui Chen, Arnab Manna, Gokul Nath SJ, Virat Tara, Dennis Callahan, Cosmin Constantin Popescu, Juejun Hu, Arka Majumdar   +10 more
wiley   +1 more source

ISO observations and models of galaxies with Hidden Broad Line Regions

, 2005
We present ISO mid-infrared spectrophotometry and far-infrared photometry of galaxies with Hidden Broad Line Regions (HBLR). We also present radiative transfer models of their spectral energy distributions which enable us to separate the contributions ...
A. Efstathiou, Alexander, Alexander, Antonucci, Antonucci, Bruzual, Cameron, Cesarsky, Clavel, Coulais, Dullemond, Efstathiou, Efstathiou, Efstathiou, Efstathiou, Farrah, Farrah, Galliano, Genzel, Granato, Granato, Heisler, Hughes, Kessler, Krügel, Kuraszkiewicz, Laor, Lumsden, Lumsden, Maiolino, Maiolino, Miller, Morel, Nenkova, Pier, Pier, Priddey, R. Siebenmorgen, Rieke, Roche, Rowan-Robinson, Rowan-Robinson, Rowan-Robinson, Rowan-Robinson, Rowan-Robinson, Rowan-Robinson, Ruiz, Scott, Siebenmorgen, Siebenmorgen, Silva, Starck, Telesco, Tran, Tran, van Bemmel, Verma, Young, Young   +58 more
core   +1 more source

Wafer‐Scale 2D High‐Entropy Transition Metal Dichalcogenide Thin‐Film Catalysts for Efficient and Durable Photoelectrochemical Hydrogen Production

Advanced Materials, EarlyView.
A wafer‐scale 2D high‐entropy (MoWTaNbRu)S2 thin‐film catalyst with a distorted 1T phase integrated onto p‐Si photocathode is designed for highly efficient and durable photoelectrochemical hydrogen evolution reaction. The high‐entropy effect in layered transition metal dichalcogenides optimizes hydrogen adsorption energetics, accelerates photogenerated
Sang Eon Jun, Jin Ho Seo, Jaehyun Kim, Hyungsoo Lee, Seongbeen Kim, Woo Seok Cheon, Sabina Kim, In Hye Kwak, Byeong‐Gwan Cho, Ki Chang Kwon, Chul‐Ho Lee, Jungwon Park, Jooho Moon, Jennifer A. Dionne, Ho Won Jang   +14 more
wiley   +1 more source

Noise Mitigation of the SMOS L1C Multi-Angle Brightness Temperature Based on the Lookup Table

Remote Sensing
Owing to the inherently lower sensitivity of microwave aperture synthesis radiometers (ASRs), Soil Moisture and Ocean Salinity (SMOS) satellite brightness temperature (TB) measurements exhibit significantly greater system noise than real-aperture ...
Ke Chen, Ruile Wang, Qian Yang, Jiaming Chen, Jun Gong   +4 more
doaj   +1 more source

Bioelectrical Interfaces Beyond Excitable Cells: Cancer, Aging, and Gene Expression Modulation

Advanced Materials Interfaces, EarlyView.
ABSTRACT The investigation of biological conductivity has evolved from its classical foundation based on ionic fluxes underpinning cardiac and neuronal excitability to a multifaceted regulator of cellular physiology. Traditional approaches for probing electrical events in living matter focused largely on action potentials recording.
Paolo Cadinu, Matthew K. Burgess, Catarina Franco Jones, Marzia Iarossi, Manuel Schröter, Nako Nakatsuka, Mustafa B. A. Djamgoz, Gil Gonçalves, Sidahmed Abayzeed, Paola Sanjuán‐Alberte, Paula M. Mendes, Frankie J. Rawson, Malavika Nair, Michael Levin, Rosalia Moreddu   +14 more
wiley   +1 more source

Multi-Aperture CMOS Sun Sensor for Microsatellite Attitude Determination

Sensors, 2009
This paper describes the high precision digital sun sensor under development at the University of Naples. The sensor determines the sun line orientation in the sensor frame from the measurement of the sun position on the focal plane.
Michele Grassi, Giancarlo Rufino
doaj   +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

Galaxies at z=4 and the Formation of Population II

, 1997
We report the discovery of four high-redshift objects (3.3 < z < 4) observed behind the rich cluster CL0939+4713 (Abell 851). One object (DG 433) has a redshift of z=3.3453; the other three objects have redshifts of z\approx 4: A0 at z=3.9819, DG 353 and
Alan Dressler, Augustus Oemler, Jr., Ebbels T. M. D., Pettini M., S. C. Trager, S. M. Faber, Schuster W. J., Seitz C., Steinmetz M.   +8 more
core   +2 more sources

Non‐Continuous Iridescent Variable Structural Color Based on Metallic Surface Periodic Structures

Advanced Materials Interfaces, EarlyView.
This study presents an ink‐free laser nanofabrication technique that generates periodic arched microstructures on titanium surfaces, achieving non‐continuous iridescent dual‐color switching. The ridge and side flanks of these structures possess distinct oxide film thicknesses, enabling angle‐dependent selective reflection of specific wavelengths.
XiangWei Liu, XiaoSong Yu, Jiao Geng, LiPing Shi   +3 more
wiley   +1 more source