Results 21 to 30 of about 650,857 (339)

Solar-type Stars Observed by LAMOST and Kepler

, 2020
Obtaining measurements of chromospheric and photometric activity of stars with near-solar fundamental parameters and rotation periods is important for a better understanding of solar-stellar connection.
Bi, Shaolan, Du, Minghao, Li, Tanda, Li, Yaguang, Reinhold, Timo, Shapiro, Alexander I., Sowmya, Krishnamurthy, Xiang, Maosheng, Yu, Jie, Zhang, Jinghua, Zhang, Xianfei   +10 more
core   +1 more source

Stellar magnetic activity and variability of oscillation parameters - An investigation of 24 solar-like stars observed by Kepler [PDF]

, 2016
Context. The Sun and solar-like stars undergo activity cycles for which the underlying mechanisms are not well understood. The oscillations of the Sun are known to vary with its activity cycle and these changes provide diagnostics on the conditions below
Davies, Guy, Kiefer, René, Roth, Markus, Schad, Ariane   +3 more
core   +2 more sources

Mask-Pix2Pix Network for Overexposure Region Recovery of Solar Image

Advances in Astronomy, 2019
Overexposure may happen for imaging of solar observation as extremely violet solar bursts occur, which means that signal intensity goes beyond the dynamic range of imaging system of a telescope, resulting in loss of signal.
Dong Zhao, Long Xu, Linjie Chen, Yihua Yan, Ling-Yu Duan   +4 more
doaj   +1 more source

The chaotic solar cycle II. Analysis of cosmogenic 10Be data

, 2013
Context. The variations of solar activity over long time intervals using a solar activity reconstruction based on the cosmogenic radionuclide 10Be measured in polar ice cores are studied. Methods.
Brajsa, R., Calogovic, J., Hanslmeier, A., Ivezic, Z., MacLeod, C. L., Ruzdjak, D., Skokic, I., Steinhilber, F., Vrsnak, B.   +8 more
core   +1 more source

Blobs in a Solar EUV Jet

Frontiers in Astronomy and Space Sciences, 2022
An Extreme Ultraviolet (EUV) jet that occurred around 22:30 on July 2, 2012 was observed by the Atmospheric Imaging Assembly (AIA) on-board the Solar Dynamics Observatory (SDO). There were two phases of the jet. In Phase 1, two blobs were observed.
Jie Chen, Robertus Erdélyi, Jiajia Liu, Yuanyong Deng, Yuanyong Deng, Fionnlagh Mackenzie Dover, Qingmin Zhang, Mei Zhang, Mei Zhang, Leping Li, Jiangtao Su, Jiangtao Su   +11 more
doaj   +1 more source

Solar surface rotation: N-S asymmetry and recent speed-up

, 2015
Context. The relation between solar surface rotation and sunspot activity still remains open. Sunspot activity has dramatically reduced in solar cycle 24 and several solar activity indices and flux measurements experienced unprecedentedly low levels ...
Mursula, K., Usoskin, I., Zhang, L.
core   +1 more source

By dawn or dusk—how circadian timing rewrites bacterial infection outcomes

FEBS Letters, EarlyView.
The circadian clock shapes immune function, yet its influence on infection outcomes is only beginning to be understood. This review highlights how circadian timing alters host responses to the bacterial pathogens Salmonella enterica, Listeria monocytogenes, and Streptococcus pneumoniae revealing that the effectiveness of immune defense depends not only
Devons Mo, Catherine S. Palmer, Jacqueline M. Kimmey   +2 more
wiley   +1 more source

Forecasting of the Geomagnetic Activity for the Next 3 Days Utilizing Neural Networks Based on Parameters Related to Large‐Scale Structures of the Solar Corona

Space Weather
With the increasing number of large constellations, it is crucial to accurately predict satellite positions and movements using upper atmosphere models driven by geomagnetic indices. Machine learning (ML) can quickly provide geomagnetic index predictions.
Tingyu Wang, Bingxian Luo, Jingjing Wang, Xianzhi Ao, Liqin Shi, Qiuzhen Zhong, Siqing Liu   +6 more
doaj   +1 more source

Understanding bio‐based polymers: A study of origins, properties, biodegradation and their impact on health and the environment

FEBS Open Bio, EarlyView.
This review provides an overview of bio‐based polymer sources, their unique functional properties and their environmental impact, and addresses their role as sustainable alternatives. It discusses end‐of‐life options, including composting and anaerobic digestion for renewable energy.
Sabina Kolbl Repinc, Blaž Stres, Mirica Karlovits, Igor Karlovits, Petra Jerič, Ondrej Panák, Anja Verbič, Blaž Likozar, Uroš Novak   +8 more
wiley   +1 more source

Ionospheric TEC Forecasting with ED-ConvLSTM-Res Integrating Multi-Channel Features

Remote Sensing
This paper proposes a convolutional Long Short-Term Memory (ConvLSTM) network integrated with multi-channel features dedicated to ionospheric total electron content (TEC) forecasting. To improve generalization, solar, and geomagnetic activity indices are
Jiayue Yang, Wengeng Huang, Lei Zhang, Heng Xu, Hua Shen, Xin Wang, Ming Li   +6 more
doaj   +1 more source