Results 31 to 40 of about 1,269 (230)

On forecasting the sunspot numbers

Solar Physics, 1990
We have applied a technique recently proposed basing on learning nonlinear dynamics locally to describe the annual sunspot relative numbers. It is proved that the number of past points for prediction should be greater than 4 but less than 10. This rather simple approach yields in average relatively good results for short-term forecasts (< 11 yr ...
J. Kurths, A. A. Ruzmaikin
openaire   +2 more sources

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

Sunspot Number Prediction Using Gated Recurrent Unit (GRU) Algorithm

IJCCS (Indonesian Journal of Computing and Cybernetics Systems), 2021
Sunspot is an area on photosphere layer which is dark-colored. Sunspot is very important to be researched because sunspot is affected by sunspot numbers, which present the level of solar activity. This research was conducted to make prediction on sunspot
Unix Izyah Arfianti, Dian Candra Rini Novitasari, Nanang Widodo, Moh. Hafiyusholeh, Wika Dianita Utami   +4 more
doaj   +1 more source

A Deep Learning Approach for Automated Total Sunspot Number Estimation

The Astrophysical Journal
Accurate sunspot number estimation is essential for understanding the long-term evolution of solar activity and its impact on space weather. Sunspot numbers have been manually determined, leading to inconsistencies and observer-dependent biases.
Yimin Wang, Jiajia Liu, Jing Chen, Robertus Erdélyi, Norbert G. Gyenge, Ye Jiang   +5 more
doaj   +1 more source

Active Days around Solar Minimum and Solar Cycle Parameter

Journal of Astronomy and Space Sciences, 2021
Utilizing a new version of the sunspot number and group sunspot number dataset available since 2015, we have statistically studied the relationship between solar activity parameters describing solar cycles and the slope of the linear relationship ...
Heon-Young Chang
doaj   +1 more source

Rediscovering the observations of solar prominences from 1906 to 1957 recorded at the Madrid Astronomical Observatory

Journal of Space Weather and Space Climate, 2023
The Madrid Astronomical Observatory implemented a solar observation program from 1876 to 1986. In addition to sunspots, the observers at this observatory recorded other solar features such as prominences.
Aparicio Alejandro Jesús Pérez, Carrasco Víctor, Gallego María Cruz, Vaquero José Manuel   +3 more
doaj   +1 more source

Molecular and Cellular Hallmarks of Age‐Related Vestibular Hair Cell Degeneration

Advanced Science, EarlyView.
This study utilizes single‐cell RNA‐seq transcriptomes, advanced imaging, and electrophysiology to examine universal and cell‐type‐specific aging signatures of vestibular hair cells. The study shows that impaired hair bundle function is a key driver of age‐related vestibular dysfunction.
Samadhi Kulasooriya, Huizhan Liu, Sarath Vijayakumar, Celia Bloom, Zhenhang Xu, Shu Tu, Benjamin J. Borgmeier, Mi Zhou, Litao Tao, Bechara Kachar, David Z. He   +10 more
wiley   +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

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

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