Results 51 to 60 of about 339,455 (292)

An E-Band Beam Sharpening Antenna Based on Monopulse Comparator

IEEE Access, 2021
An E-band antenna module and corresponding beam sharpening method is proposed to achieve high azimuth resolution for front-looking real aperture radar application.
Zhenhua Chen, Peng Teng, Jianru Wang
doaj   +1 more source

Deployment of a Secondary Concentrator to Increase the Intercept Factor of a Dish with Large Slope Errors [PDF]

, 1984
The testing of a hyperbolic trumpet non-imaging secondary concentrator with a parabolic dish having slope errors of about 10 mrad is reported. The trumpet, which has a concentration ratio of 2.1, increased the flux through a 141-mm focal aperture by 72%,
Gray, E., Ogallagher, J. J., Ortabasi, U.   +2 more
core   +1 more source

Modulating Electrochemical CO2 Reduction Pathways via Interfacial Electric Field

Advanced Functional Materials, EarlyView.
Engineering interfacial electric fields in Cu/ITO electrodes enables precise control of CO2 reduction pathways. Charge transfer from Cu to ITO generates positively charged Cu species that steer selectivity from ethylene toward methane. This work demonstrates how interfacial electric‐field modulation can direct reaction intermediates and transform ...
Mahdi Salehi, Zhengyuan Gao, Sai Phani Kumar Vangala, Amirhossein Farzi, Hamed Heidarpour, Morgan McKee, Nikolay Kornienko, Ali Seifitokaldani   +7 more
wiley   +1 more source

Positive‐Tone Nanolithography of Antimony Trisulfide with Femtosecond Laser Wet‐Etching

Advanced Functional Materials, EarlyView.
A butyldithiocarbamic acid (BDCA) etchant is used to fabricate various micro‐ and nanoscale structures on amorphous antimony trisulfide (a‐Sb2S3) thin film via femtosecond laser etching. Numerical analysis and experimental results elucidate the patterning mechanism on gold (reflective) and quartz (transmissive) substrates.
Abhrodeep Dey, Uwe Hübner, Albane Benardais, Xiaofei Wu, Andrea Dellith, Jan Dellith, Torsten Wieduwilt, Henrik Schneidewind, Markus A Schmidt, Virginie Nazabal, Volker Deckert, Jer‐Shing Huang, Wei Wang   +12 more
wiley   +1 more source

Evaluation of Geogrid-Aperture Size on the Behavior of Reinforced Fine-Sand Supporting a Square Footing [PDF]

Port Said Engineering Research Journal
Fine-sand soils cannot support the design loads due to their low load-bearing capacity. Soil reinforcement with geogrid-layers is a common technique to increase the low bearing capacity of fine-sand.
Essam BADRAWI ATTIA
doaj   +1 more source

Aperture effects on the oxygen abundance determinations from CALIFA data

, 2016
This paper aims at providing aperture corrections for emission lines in a sample of spiral galaxies from the Calar Alto Legacy Integral Field Area Survey (CALIFA) database.
Alves, J., Catalán-Torrecilla, C., de Paz, A. Gil, Delgado, R. M. González, Flores, H., Galbany, L., García-Benito, R., Gomes, J. M., Husemann, B., Iglesias-Páramo, J., Kehrig, C., López-Sánchez, Á. R., Marino, R. A., Mast, D., Mendoza, M. A., Mollá, M., Morales, A. Castillo, Papaderos, P., Petropoulou, V., Puertas, S. Duarte, Pérez-Montero, E., Rosales-Ortega, F. F., Sánchez, S. F., Vílchez, J. M., Walcher, C. J., Ziegler, B.   +25 more
core   +3 more sources

Herschel Far-Infrared and Sub-millimeter Photometry for the KINGFISH Sample of Nearby Galaxies [PDF]

, 2011
New far-infrared and sub-millimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies from the Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel (KINGFISH) sample.
A. D. Bolatto, A. E. Miller, A. F. Crocker, A. K. Leroy, Aguirre, B. A. Groves, B. D. Johnson, B. R. Brandl, B. T. Draine, Benford, Bolatto, C. D. Wilson, C. W. Engelbracht, C.-N. Hao, D. A. Dale, D. Calzetti, Dale, Dale, Dale, Dale, Draine, Draine, E. J. Montiel, E. J. Murphy, E. Schinnerer, Engelbracht, F. S. Tabatabaei, F. Walter, Finkbeiner, G. Aniano, G. Helou, H. Roussel, H.-W. Rix, J. Koda, J. L. Hinz, J.-D. T. Smith, K. D. Gordon, K. M. Sandstrom, K. V. Croxall, Kennicutt, Kovács, L. Armus, L. K. Hunt, Li, M. G. Wolfire, M. Galametz, M. Sauvage, Moustakas, N. Rahman, O. Krause, Ott, P. Beirão, P. N. Appleton, Pascale, Pilyugin, R. A. Skibba, R. C. Kennicutt, Roussel, S. E. Meidt, S. Zibetti, Schlegel, Skibba, Smith, Walter, Walter, Weingartner, Y. Li   +66 more
core   +4 more sources

Photoswitching Conduction in Framework Materials

Advanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez, Stefan Hecht, Wolfgang Wenzel, Lars Heinke, Mariana Kozlowska   +4 more
wiley   +1 more source

Numerical Investigation of Influence of In-Situ Stress Ratio, Injection Rate and Fluid Viscosity on Hydraulic Fracture Propagation Using a Distinct Element Approach

Energies, 2016
Numerical simulation is very useful for understanding the hydraulic fracturing mechanism. In this paper, we simulate the hydraulic fracturing using the distinct element approach, to investigate the effect of some critical parameters on hydraulic ...
Bo Zhang, Xiao Li, Zhaobin Zhang, Yanfang Wu, Yusong Wu, Yu Wang   +5 more
doaj   +1 more source

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

Advanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato, Haishuo Guan, Bianca M. Carrara, Mira Jacobs, Matteo Monticelli, Lukas Moser, Thomas Moragues, Andrew J. deMello, Tomaso Zambelli, Martin Ehrbar   +9 more
wiley   +1 more source