Results 71 to 80 of about 1,877,814 (242)
Evolution of sunspot properties during solar cycle 23
, 2011 The long term study of the Sun is necessary if we are to determine the evolution of sunspot properties and thereby inform modeling of the solar dynamo, particularly on scales of a solar cycle. We aim to determine a number of sunspot properties over cycle
Watson, F. +2 more
core +4 more sources
Rational Expectations Fools' Bubbles
International Economic Review, EarlyView.ABSTRACT We develop a rational, Walrasian model of speculative bubbles inspired by the Kindleberger–Minsky view, which describes bubbles as wave‐like market processes. Touched off by an initial shock, price booms are initially self‐reinforcing but become self‐destructive later when prices surpass fundamental value.
Luis Araujo, Antonio Doblas‐Madrid
wiley +1 more source
Detecting Periodicity of a General Stationary Time Series via AR(2)‐Model Fitting
Journal of Time Series Analysis, EarlyView.ABSTRACT Estimating the periodicity of a stationary time series via fitting a second‐order stationary autoregressive (AR(2)) model has been initiated by the seminal paper of Yule (1927). We investigate properties of this procedure when applied to general stationary processes possessing a spectral density with a dominant peak at some unknown frequency ...
Jens‐Peter Kreiss +2 more
wiley +1 more source
The 22-Year Hale Cycle in Cosmic Ray Flux – Evidence for Direct Heliospheric Modulation [PDF]
, 2014 The ability to predict times of greater galactic cosmic ray (GCR) fluxes is important for reducing the hazards caused by these particles to satellite communications, aviation, or astronauts.
Thomas, SR, Lockwood, M, Owens, MJ
core
Solar Activity Spikes: A Comparative Analysis of Monthly Smoothed and Unsmoothed Sunspot Numbers
UniverseThis work investigates the differences between the monthly and 13-month smoothed sunspot numbers since 1749, using data from sunspot number (version 2).
Víctor M. S. Carrasco +4 more
doaj +1 more source
Long‐term stability of transcrestal sinus augmentation
Periodontology 2000, EarlyView.Abstract Transcrestal sinus augmentation has emerged as a minimally invasive alternative to lateral window techniques for vertical bone augmentation in the edentulous maxilla. Since its early introduction and modification over the last several decades, this technique has demonstrated predictable outcomes for implant placement in regions with limited ...
Sandra H. Stuhr +4 more
wiley +1 more source
Welfare Gains and Losses in Sunspot Equilibria [PDF]
We study a standard two period exchange economy with one nominal asset. As is well known there is a continuum of sunspot equilibria around each efficient equilibrium.
Atsushi Kajii
core
Comparison of latitude distribution and evolution of even and odd sunspot cycles [PDF]
, 2020 We study the latitudinal distribution and evolution of sunspot areas of Solar Cycles 12 – 23 (SC12–23) and sunspot groups of Solar Cycles 8 – 23 (SC8–23) for even and odd cycles.
Takalo, J. (Jouni), Takalo, Jouni
core +1 more source
Teacher Perspectives of Student Engagement in Data Practice Instruction: Two Classroom Conditions
School Science and Mathematics, EarlyView.ABSTRACT This study examines high school science teachers' perceptions of student engagement in data practices across two instructional contexts: a scaffolded, student‐centered environment using the Science Practices Innovation Notebook (SPIN) and a business‐as‐usual (BAU) teacher‐led investigation.
Erin Peters‐Burton +4 more
wiley +1 more source
Time series modelling of sunspot numbers using long range cyclical dependence [PDF]
This paper deals with the analysis of the monthly structure of sunspot numbers using a new technique based on cyclical long range dependence. The results show that sunspot numbers have a periodicity of 130 months, but more importantly, that the series is
Luis A. Gil-Alana
core