Results 41 to 50 of about 3,012 (284)

A Comparative Study of non-deep Learning, Deep Learning, and Ensemble Learning Methods for Sunspot Number Prediction

Applied Artificial Intelligence, 2022
Solar activity has significant impacts on human activities and health. One most commonly used measure of solar activity is the sunspot number. This paper compares three important non-deep learning models, four popular deep learning models, and their five
Yuchen Dang, Ziqi Chen, Heng Li, Hai Shu
doaj   +1 more source

ACLY‐Driven Metabolic Reprogramming Promotes Histone Acetylation and Inflammation‐Associated Fibrosis in Chronic Kidney Disease

Advanced Science, EarlyView.
This study reveals a citrate–ACLY–H3K27ac metabolic–epigenetic axis driving inflammatory gene activation and kidney fibrosis, highlighting ACLY inhibition as a potential therapeutic strategy for chronic kidney disease (CKD). ABSTRACT The mechanisms by which metabolic stress drives epigenetic dysregulation and fibrosis in chronic kidney disease (CKD ...
Chunxiu Du, Dhanunjay Mukhi, Lingzhi Li, Chenyu Li, Siyu Pan, Bernhard Dumoulin, Eunji Ha, Lakshmi P Kolligundla, Yanjuan Hou, Jonathan Levinsohn, Chaelin Kang, Konstantin Adrian Klötzer, Junnan Wu, Samer Mohandes, Kathryn E Wellen, Katalin Susztak   +15 more
wiley   +1 more source

Correlation between Supergranular Lane Widths and Sunspot Number; A Simple Way to Predict the Amplitude of Sunspot Cycle

The Astrophysical Journal Letters, 2023
The network structure seen in the solar images is the outline of supergranulation, which is the large-scale convection in the Sun with a size of about 30 Mm and a lifetime of 24 hr.
K P Raju, Jagdev Singh, Belur Ravindra, Muthu Priyal   +3 more
doaj   +1 more source

A Bias-free Deep Learning Approach for Automated Sunspot Segmentation

The Astrophysical Journal
Solar activities significantly influence space weather and the Earth’s environment, necessitating accurate and efficient sunspot detection. This study explores deep learning methods to automate sunspot identification in solar satellite images, keeping ...
Jing Chen, Norbert G. Gyenge, Ye Jiang, Robertus Erdélyi, Jiajia Liu, Yimin Wang   +5 more
doaj   +1 more source

Retinal Vessel Segmentation: A Comprehensive Review From Classical Methods to Deep Learning Advances (1982–2025)

Advanced Intelligent Systems, EarlyView.
Four decades of retinal vessel segmentation research (1982–2025) are synthesized, spanning classical image processing, machine learning, and deep learning paradigms. A meta‐analysis of 428 studies establishes a unified taxonomy and highlights performance trends, generalization capabilities, and clinical relevance.
Avinash Bansal, Jan Kubíček, Jana Bahrová, Alice Varyšová, Martin Augustýnek, Marek Penhaker, Juraj Timkovič   +6 more
wiley   +1 more source

An Automatic Approach for Grouping Sunspots and Calculating Relative Sunspot Number on SDO/HMI Continuum Images

The Astronomical Journal
The relative sunspot number is one of the major parameters for the study of long-term solar activity. The automatic calculation of the relative sunspot number is more stable and accurate as compared to manual methods.
Cui Zhao, Shangbin Yang, Tingmei Wang, Haiyan Zhao, Shiyuan Liu, Fangyuan He, Zhengkun Hu   +6 more
doaj   +1 more source

Impact of sunspot activity on the rainfall patterns over Eastern Africa: a case study of Sudan and South Sudan

Journal of Water and Climate Change, 2021
The relation between sunspots and rainfall patterns is still obscure in Africa, especially for Sudan and South Sudan. This research explores the response of rainfall to solar activity in eastern regions of Africa, with a case study in Sudan and South ...
Mostafa A. Mohamed, Mohamed El-Sayed El-Mahdy   +1 more
doaj   +1 more source

Histidine Supplementation Stabilizes Hearing and Vision and Improves Growth in HARS1‐Related Autosomal Recessive Disorder Associated With Usher‐Like Symptoms

American Journal of Medical Genetics Part A, EarlyView.
ABSTRACT Autosomal recessive HARS1‐related disorder (originally described as Usher syndrome type 3B) caused by a homozygous Y454S variant in the histidyl‐tRNA synthetase gene (HARS1) is characterized by progressive sensorineural hearing and vision loss and respiratory deterioration with risk for sudden death following febrile illnesses.
Victoria Mok Siu, Rosan Kenana, Rana Chakrabarti, Sarah D. P. Wilhelm, Joseph Andrews, Susan J. Leat, Christina Parker, Michael Miller, Leslie A. Nangle, Wendy McCaul, Ashfia Chowdhury, Natalie Hutchings, Ryan A. Adams, Lauren Guy, Mandy Rhody, Verena Juncal, Marisa I. Mendes, Desiree E. C. Smith, Gajja S. Salomons, Angelica A. Moresco, Daphne L. McCulloch, D. Holmes Morton, Ilka U. Heinemann, C. Anthony Rupar   +23 more
wiley   +1 more source

Extraction of Sunspots from Chinese Sunspot Drawings Based on Semisupervised Learning

The Astrophysical Journal
China has six observing stations, providing over 52,000 handwritten sunspot drawings from 1947–2016. The observing stations are the Purple Mountain Astronomical Observatory (PMO), Yunnan Astronomical Observatory (YNAO), Qingdao Observatory Station (QDOS),
Qianqian Dong, Yunfei Yang, Song Feng, Wei Dai, Bo Liang, Jianping Xiong   +5 more
doaj   +1 more source

CYCLES AND UNIVERSALITY IN SUNSPOT NUMBER FLUCTUATIONS

The Astrophysical Journal, 2009
We analyze the famous Wolf's sunspot numbers. Surprisingly, we discovered that the distribution of the sunspot number fluctuations for both the ascending and descending phases is close to the universal nonparametric Bramwell-Holdsworth-Pinton (BHP) distribution. Since the BHP probability density function appears in several other physical phenomena, our
R. Gonçalves, A. A. Pinto, N. Stollenwerk   +2 more
openaire   +2 more sources