Results 51 to 60 of about 106,724 (293)

Spectroscopic Imaging of the Sun with MeerKAT: Opening a New Frontier in Solar Physics

The Astrophysical Journal
Solar radio emissions provide several unique diagnostics to estimate different physical parameters of the solar corona, which are otherwise simply inaccessible. However, imaging the highly dynamic solar coronal emissions spanning a large range of angular
Devojyoti Kansabanik, Surajit Mondal, Divya Oberoi, James O. Chibueze, N. E. Engelbrecht, R. D. Strauss, E. P. Kontar, G. J. J. Botha, P. J. Steyn, Amoré E. Nel   +9 more
doaj   +1 more source

Periodicities in Solar Radio Noise Emission [PDF]

Australian Journal of Physics, 1959
In a recent article, Roberts (1958) described solar radio wave emissions in the range 40-80 Mc/s. The investigations were a continuation of work initiated earlier by Wild and McCready (1950) on the dynamic radio-frequency spectrum, and by Wild, Murray, and Rowe (1954) employing a 40-240 Mc/s spectrograph.
openaire   +1 more source

Zwitterionic Self‐Assembled Monolayer for Simultaneous Noise Suppression and Hole Extraction in High‐Performance Near‐Infrared Organic Photodetectors

Advanced Functional Materials, EarlyView.
This study presents a new hole transporting material (HTM) mechanism for self‐assembled monolayers in near‐infrared organic photodetectors. The formation of zwitterions induces a strong electric field that significantly increases the work function of HTM‐coated indium tin oxide substrates. The devices exhibit low dark current and noise, along with high
Jiyoung Shin, Gyeong Min Lee, Juyeon Shin, Jaewoong Kim, Tae Hyuk Kim, Do Yeon Kim, Myeong In Kim, Kyeounghak Kim, Jae Won Shim, In Hwan Jung   +9 more
wiley   +1 more source

Letter to the Editor
UHF electromagnetic emission stimulated by HF pumping of the ionosphere [PDF]

Annales Geophysicae, 2002
UHF electromagnetic emission (with a frequency near 600 MHz) from the F-region of the ionosphere pumped by an HF powerful radio wave is revealed. Possible mechanisms of the emission excitation, such as plasma mode con-version, scattering or Earth ...
S. M. Grach, S. M. Grach, V. M. Fridman, L. M. Lifshits, T. S. Podstrigach, E. N. Sergeev, S. D. Snegirev   +6 more
doaj   +1 more source

Steep-Spectrum Radio Emission from the Low-Mass Active Galactic Nucleus GH 10

, 2008
GH 10 is a broad-lined active galactic nucleus (AGN) energized by a black hole of mass 800,000 Solar masses. It was the only object detected by Greene et al. in their Very Large Array (VLA) survey of 19 low-mass AGNs discovered by Greene & Ho.
Greene, J. E., Ho, L. C., Ulvestad, J. S., Wrobel, J. M.   +3 more
core   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

WFPC2 Observations of the Cooling Flow Elliptical in Abell 1795 [PDF]

, 1996
We present WFPC2 images of the core of the cooling flow cD galaxy in Abell 1795. An irregular, asymmetric dust lane extends 7 \h75 kpc in projection to the north-northwest.
Alan M. Watson, Anton K., Christopher Garasi, Christopher J. Burrows, David Crisp, De Jong T., Gilda E. Ballester, Goudfrooij P., Goudfrooij P., J. Jeff Hester, James A. Westphal, Jason Pinkney, Jeremy R. Mould, John G. Hoessel, John S. Gallagher III, John T. Clarke, John T. Trauger, Johnstone R. M., Jon Holtzman, Karl R. Stapelfeldt, Norgaard H. U., Paul A. Scowen, Richard E. Griffiths, Robin W. Evans, Stefano Casertano   +24 more
core   +4 more sources

Anomalous Pressure‐Temperature Ultrahigh Sensitivities in Atomically Engineered Carbonitride MXenes for Multifunctional Wearable Human–Machine Interfaces: Joint Computational–Experimental Elucidations

Advanced Functional Materials, EarlyView.
Atomically engineered layered 2D Ti3CNTz carbonitride MXene exhibits ultrahigh heat and pressure sensitivity, enabling dual‐mode sensors with 300%–400% performance enhancement and durability for real‐time health‐monitoring interface devices. Precise nitrogen incorporation (e.g., Ti3C1.8N0.2Tz) boosts conductivity, enhancing temperature response, while ...
Debananda Mohapatra, Ju‐Hyoung Han, Hyun Jin Kang, Jeong Eun Byun, Seonghun Lee, Sanghyuk Lee, Yeseul Son, Jaeeun Park, Tae Joo Shin, Youngho Kang, Jung Woo Lee, Soon‐Yong Kwon, Soo‐Hyun Kim   +12 more
wiley   +1 more source

Exo-lightning radio emission: the case study of HAT-P-11b

, 2017
Lightning induced radio emission has been observed on solar system planets. Lecavelier des Etangs et al. [2013] carried out radio transit observations of the exoplanet HAT-P-11b, and suggested a tentative detection of a radio signal. Here, we explore the
Helling, Christiane, Hodosán, Gabriella, Rimmer, Paul B.   +2 more
core   +1 more source

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

Advanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai, Xiaoyu Huo, Xin Long, Enkang Fu, Xusong Gong, Lei Wei, Liang An   +6 more
wiley   +1 more source