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To adequately constrain the frequency of energy deposition in active region cores in the solar corona, systematic comparisons between detailed models and observational data are needed. In this paper, we describe a pipeline for forward…

Solar and Stellar Astrophysics · Physics 2019-07-31 W. T. Barnes , S. J. Bradshaw , N. M. Viall

The historical reconstruction of the Sun's surface magnetic field remains a persistent challenge, limiting our ability to investigate the long-term global properties of the Sun, including the evolution of the large-scale magnetic field,…

Solar and Stellar Astrophysics · Physics 2025-11-25 Bibhuti Kumar Jha , Lisa A. Upton , Greg Kopp , Odele Coddington

Active regions are thought to be one contributor to the slow solar wind. Upflows in EUV coronal spectral lines are routinely osberved at their boundaries, and provide the most direct way for upflowing material to escape into the…

Solar and Stellar Astrophysics · Physics 2021-08-18 David H. Brooks , Louise Harra , Stuart D. Bale , Krzysztof Barczynski , Cristina Mandrini , Vanessa Polito , Harry P. Warren

We developed an efficient algorithm integrated in our 3D modeling tool, GX Simulator (Nita et al. 2015), allowing quick computation of the synthetic intensity and polarization maps of solar active regions (AR) in the ALMA spectral range.…

Solar and Stellar Astrophysics · Physics 2015-06-30 Gregory Fleishman , Maria Loukitcheva , Gelu Nita

Using raw sensor data to model and train networks for Human Activity Recognition can be used in many different applications, from fitness tracking to safety monitoring applications. These models can be easily extended to be trained with…

Machine Learning · Computer Science 2019-05-03 Schalk Wilhelm Pienaar , Reza Malekian

Linking solar wind properties to the activities and characteristics of its source regions can enhance our understanding of its origin and generation mechanisms. Using the Mount Wilson magnetic classification (MWMC), we categorize all active…

Solar and Stellar Astrophysics · Physics 2025-10-13 Xinzheng Shi , Hui Fu , Zhenghua Huang , Limei Yan , Qi Liu , Lidong Xia

Accurate climate forecasting is vital for Bangladesh, a region highly susceptible to climate change impacts on temperature and rainfall. Existing models often struggle to capture long-range dependencies and complex temporal patterns in…

Machine Learning · Computer Science 2025-10-29 Usman Gani Joy , Shahadat kabir , Tasnim Niger

Solar active regions are driven dissipative dynamical systems. The turbulent convection zone forces new magnetic flux tubes to rise above the photosphere and shuffles the magnetic fields which are already above the photosphere. The driven…

Astrophysics · Physics 2009-09-29 Loukas Vlahos

Current operational forecasts of solar eruptions are made by human experts using a combination of qualitative shape-based classification systems and historical data about flaring frequencies. In the past decade, there has been a great deal…

Solar and Stellar Astrophysics · Physics 2020-06-02 V. Deshmukh , T. E. Berger , E. Bradley , J. D. Meiss

We present a combined analysis of the applications of the weighted horizontal magnetic gradient (denoted as WG_M in Korsos et al., ApJ, 802, L21, 2015) method and the magnetic helicity tool (Berger & Field, JFM, 147, 133, 1984) employed for…

Solar and Stellar Astrophysics · Physics 2018-01-03 Yudong Ye , M. B. Korsos , R. Erdelyi

We studied the formation of the first penumbral sector around a pore in the following polarity of the Active Region (AR) NOAA 11490. We used a high spatial, spectral, and temporal resolution data set acquired by the Interferometric…

Solar and Stellar Astrophysics · Physics 2017-01-11 M. Murabito , P. Romano , S. L. Guglielmino , F. Zuccarello

Electricity load consumption may be extremely complex in terms of profile patterns, as it depends on a wide range of human factors, and it is often correlated with several exogenous factors, such as the availability of renewable energy and…

Machine Learning · Computer Science 2025-02-03 Aleksei Kychkin , Georgios C. Chasparis

This work investigates the decayless kink oscillations of solar coronal loops and examines possible changes in their behaviour in active regions (ARs) before powerful solar flares (M- and X-class) and in the absence of powerful flares. To…

Solar and Stellar Astrophysics · Physics 2025-11-10 A. B. Nechaeva , I. V. Zimovets , I. N. Sharykin , S. A. Anfinogentov

In group activity recognition, the temporal dynamics of the whole activity can be inferred based on the dynamics of the individual people representing the activity. We build a deep model to capture these dynamics based on LSTM (long-short…

Computer Vision and Pattern Recognition · Computer Science 2016-04-07 Moustafa Ibrahim , Srikanth Muralidharan , Zhiwei Deng , Arash Vahdat , Greg Mori

In previous works we introduced a nonlinear force-free method that self-consistently calculates the instantaneous budgets of free magnetic energy and relative magnetic helicity in solar active regions (ARs). Calculation is expedient and…

Solar and Stellar Astrophysics · Physics 2015-06-16 Kostas Tziotziou , Manolis K. Georgoulis , Yang Liu

Short-term industrial enterprises power system forecasting is an important issue for both load control and machine protection. Scientists focus on load forecasting but ignore other valuable electric-meters which should provide guidance of…

Machine Learning · Computer Science 2024-06-04 Xiaoqiao Chen

The dynamics of horizontal plasma flows during the first hours of the emergence of active region magnetic flux in the solar photosphere have been analyzed using SOHO/MDI data. Four active regions emerging near the solar limb have been…

Solar and Stellar Astrophysics · Physics 2017-05-01 A. Khlystova

The systematic variation of solar active region (AR) properties with their magnetic flux has been the subject of numerous studies but the proposed scaling laws still vary rather widely. A correct representation of these laws and the…

Solar and Stellar Astrophysics · Physics 2026-04-24 Guilherme A. L. Nogueira , Robertus Erdelyi , Ruihui Wang , Kristof Petrovay

Long Short-Term Memory (LSTM) units have the ability to memorise and use long-term dependencies between inputs to generate predictions on time series data. We introduce the concept of modifying the cell state (memory) of LSTMs using…

Machine Learning · Computer Science 2021-05-04 Vlad Velici , Adam Prügel-Bennett

Long-lasting activity complexes (ACs), characterised as a series of closely located, continuously emerging solar active regions (ARs), are considered generating prominent poleward surges from observations. The surges lead to significant…

Solar and Stellar Astrophysics · Physics 2020-12-02 Zi-Fan Wang , Jie Jiang , Jie Zhang , Jing-Xiu Wang