Results 181 to 190 of about 1,242 (240)

The Sunspot Solar Observatory Data Archive: Continuing Operations at the Dunn Solar Telescope. [PDF]

open access: yesSol Phys
Sellers SG   +11 more
europepmc   +1 more source

Crises da dívida nos anos 1990

open access: yesEconomia Aplicada, 2001
Marcia Saraiva Leon
doaj  

A Risk Prediction Tool for Invasive Melanoma.

open access: yesJAMA Dermatol
Whiteman DC   +5 more
europepmc   +1 more source

A sunspot paradox [PDF]

open access: possibleEconomics Letters, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +3 more sources

Sunspots and Cycles

The Review of Economic Studies, 1986
Because sunspot equilibria seem to be of central importance for an understanding of rational expectations, we seek here to characterize completely a limited class of sunspot equilibria (stationary ones with two possible natural events) in the simplest overlapping generations model of production.
Azariadis, Costas, Guesnerie, Roger
openaire   +2 more sources

Synchronization of Sunspot Numbers and Sunspot Areas

Solar Physics, 2009
Sunspot activity is usually described by either sunspot numbers or sunspot areas. The smoothed monthly mean sunspot numbers (SNs) and the smoothed monthly mean areas (SAs) in the time interval from November 1874 to September 2007 are used to analyze their phase synchronization.
K. J. Li, P. X. Gao, L. S. Zhan
openaire   +1 more source

Origin of Sunspots

Nature, 1950
ALTHOUGH astronomers have commonly believed that sunspots are deep-seated vortices, the chief characteristics of a spot (an intense magnetic field and a cool umbra) have never been successfully explained.
openaire   +2 more sources

Sunspot cycles

Economic Theory, 2003
This paper shows new properties about the equilibria of a stationary OG economy by establishing a connection between its stationary equilibria and those of a finite economy, with and without extrinsic uncertainty. Specifically, it shows the countability and local uniqueness with respect to the sup metric of the so-called sunspot cycles introduced here,
openaire   +2 more sources

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