Results 51 to 60 of about 10,736 (185)

Recent Development in Designing Electrocatalysts for Efficient and Selective Ammonia Oxidation Reaction

Advanced Energy and Sustainability Research, Volume 7, Issue 4, April 2026.
Ammonia oxidation reaction is a promising candidate for renewable energy conversion. The recent considerable progress in its mechanism understanding and catalyst development are summarized here along with the remaining challenges and perspectives regarding future development strategies.
Yeyu Deng, Zhixian Bao, Yuan Huang, Mingxin Cui, Yuan Chen, Hao Li, Li Wei   +6 more
wiley   +1 more source

Small-scale Inhomogeneity Effects on Coherent Solar Radio Emission

The Astrophysical Journal
The coherent radio emission mechanism of solar radio bursts (SRBs) is one of the most complicated and controversial topics in solar physics. To clarify the mechanism(s) of different types of SRBs, (radio-) wave excitation by energetic electrons in ...
Xiaowei Zhou, Patricio A. Muñoz, Jan Benáček, Lijie Zhang, Dejin Wu, Ling Chen, Zongjun Ning, Jörg Büchner   +7 more
doaj   +1 more source

Solar Physics with the Square Kilometre Array [PDF]

, 2018
The Square Kilometre Array (SKA) will be the largest radio telescope ever built, aiming to provide collecting area larger than 1 km$^2$. The SKA will have two independent instruments, SKA-LOW comprising of dipoles organized as aperture arrays in ...
Kontar, E. P., Nindos, A., Oberoi, D.
core   +2 more sources

Recent Advances in Hafnium Oxide Nanomaterials: From Controlled Synthesis, Structure, and Surface Engineering to Biomedical Applications

Rare Metals, Volume 45, Issue 4, April 2026.
ABSTRACT Hafnium oxide (HfO2) nanoparticles (NPs), derived from a rare‐metal element, have gained increasing attention as a versatile class of functional nanostructures with unique optical, dielectric, and surface properties that enable diverse biomedical applications. As a representative rare‐metal oxide, HfO2 NPs with well‐defined architectures offer
Mothana Hussein Tarawneh, Mohammed Ali Dheyab, Azhar Abdul Rahman, Mutaz Mohammad Alsardi, Azlan Abdul Aziz, Saleh T. Alanezi, Wesam Abdullah, Sara Abdulwahab, Mehran Ghasemlou   +8 more
wiley   +1 more source

Do solar decimetric spikes originate in coronal X-ray sources?

, 2009
In the standard solar flare scenario, a large number of particles are accelerated in the corona. Nonthermal electrons emit both X-rays and radio waves. Thus, correlated signatures of the acceleration process are predicted at both wavelengths, coinciding ...
A. O. Benz, Aschwanden, Battaglia, Benz, Benz, Benz, Bykov, Fleishman, Frost, Gallagher, Grigis, Grigis, Guedel, Guedel, Hill, Hudson, Kerdraon, Khan, Krucker, Krucker, Krucker, Lin, M. Battaglia, Masuda, Melrose, Messmer, Parks, Slottje, Sui, Tajima, Tomczak, Zlobec   +31 more
core   +1 more source

Dataset of Quiet Space Weather Periods for Ionospheric Studies

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract The ionosphere is a dynamic environment regularly affected from above and from below. This study identifies periods within the years 2000–2023 when the impact from above, driven by space weather, was minimal. The quiet space weather periods have wide usage for two types of ionospheric studies. At first, studies of isolated space weather events
Šimon Mackovjak, Silvia Kostárová, Jaroslav Chum, Carsten Schmidt, Patrick Hannawald, Sabine Wüst, Lisa Küchelbacher, Vladimír Truhlík, Petra Koucká Knížová, Jaroslav Urbář, Lukáš Randuška, Filip Štempel, Ján Kubančák   +12 more
wiley   +1 more source

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

LOW-FREQUENCY OBSERVATIONS OF DRIFTING, NON-THERMAL CONTINUUM RADIO EMISSION ASSOCIATED WITH THE SOLAR CORONAL MASS EJECTIONS

The Astrophysical Journal, 2013
Low-frequency (80 MHz) imaging and spectral (≈85-20 MHz) observations of moving type IV radio bursts associated with coronal mass ejections (CMEs) from the Sun on three different days are reported. The estimated drift speed of the bursts is in the range ≈150-500 km s–1.
R. Ramesh, P. Kishore, Sargam M. Mulay, Indrajit V. Barve, C. Kathiravan, T. J. Wang   +5 more
openaire   +1 more source

Parker Solar Probe Observations of Proton Core‐Beam Distributions in Heliospheric Current Sheet Region: Quasilinear Instability Analysis Combined With Collisional Relaxation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Parker Solar Probe has been proven as instrumental for the observation of young solar wind. During the encounters E‐07 and E‐08, PSP recorded the core plus beaming protons crossing the heliospheric current Sheet region. When the observed PSP data is plotted in the temperature ratio versus parallel beta space, it is found that the occurrence ...
M. Rashid, P. H. Yoon, J. Huang, C. Salem, M. Sarfraz, S. Alnussirat, R. A. López, J. Seough, H. Xie, D. Larson, R. Livi   +10 more
wiley   +1 more source

Tackling the Unique Challenges of Low-frequency Solar Polarimetry with the Square Kilometre Array Low Precursor: Pipeline Implementation

The Astrophysical Journal Supplement Series, 2023
The dynamics and the structure of the solar corona are determined by its magnetic field. Measuring coronal magnetic fields is, however, extremely hard. The polarization of low-frequency radio emissions has long been recognized as one of the few effective
Devojyoti Kansabanik, Apurba Bera, Divya Oberoi, Surajit Mondal   +3 more
doaj   +1 more source