Results 41 to 50 of about 22,234 (267)
A Deep Learning Approach for Automated Total Sunspot Number Estimation
The Astrophysical JournalAccurate 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 +5 more
doaj +1 more source
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 +1 more
doaj +1 more source
Width of Sunspot Generating Zone and Reconstruction of Butterfly Diagram
, 2010 Based on the extended Greenwich-NOAA/USAF catalogue of sunspot groups it is demonstrated that the parameters describing the latitudinal width of the sunspot generating zone (SGZ) are closely related to the current level of solar activity, and the growth ...
A.J. Conway +20 more
core +1 more source
Advanced Materials Interfaces, EarlyView.Nanozymes (NZs) have emerged as versatile artificial enzymes with tunable catalytic properties driven by atomic coordination, defect engineering, and surface chemistry. This review presents a bio–nano interface framework linking synthesis strategies, structural design, and catalytic behavior within complex biological microenvironments.
Karen Guadalupe Quintero‐Garrido +6 more
wiley +1 more source
A Bias-free Deep Learning Approach for Automated Sunspot Segmentation
The Astrophysical JournalSolar 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 +5 more
doaj +1 more source
An upper limit prediction of the peak sunspot number for solar cycle 24
Journal of Space Weather and Space Climate, 2011 In this paper we address the prediction of the maximum sunspot number in solar cycle 24. We correlate the integral sunspot activity related to the variability of the cycle decrease speed in the declining phase with the height of the next sunspot maximum.
Van der Linden R., Podladchikova T.
doaj +1 more source
Is the F10.7cm – Sunspot Number relation linear and stable?
Journal of Space Weather and Space Climate, 2021 The F10.7cm radio flux and the Sunspot Number are the most widely used long-term indices of solar activity. They are strongly correlated, which led to the publication of many proxy relations allowing to convert one index onto the other.
Clette Frédéric
doaj +1 more source
Power law relating 10.7 cm flux to sunspot number
, 2010 To investigate the relation between observations of the 10.7 cm flux and the international sunspot number so that a physical unit may be ascribed to historical records, both polynomial and power law models are developed giving the radio flux as a ...
Johnson, Robert W.
core +1 more source
Advanced Science, EarlyView.This study identifies the HDAC6/GATA4/HtrA1 axis as a critical driver of cellular senescence in the inner ear. GATA4 nuclear translocation, facilitated by HDAC6 downregulation, transcriptionally activates HtrA1, promoting hair cell senescence, SASP, and audio‐vestibular dysfunction in models of Ménière's disease and age‐related audio‐vestibular ...
Na Zhang +16 more
wiley +1 more source
The Astronomical JournalThe 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 +6 more
doaj +1 more source