Long-term variations of geomagnetic activity and their solar sources

Long-term trends of foE and geomagnetic activity variations

A relationship between foE trends and geomagnetic activity long-term variations has been revealed for the first time. By analogy with earlier obtained results on the foF2 trends it is possible to speak about the geomagnetic control of the foE long-term trends as well. Periods of increasing geomagnetic activity correspond to negative foE trends, while these trends are positive for the decreasing...

the effects of keyword and context methods on pronunciation and receptive/ productive vocabulary of low-intermediate iranian efl learners: short-term and long-term memory in focus

از گذشته تا کنون، تحقیقات بسیاری صورت گرفته است که همگی به گونه ای بر مثمر ثمر بودن استفاده از استراتژی های یادگیری لغت در یک زبان بیگانه اذعان داشته اند. این تحقیق به بررسی تاثیر دو روش مختلف آموزش واژگان انگلیسی (کلیدی و بافتی) بر تلفظ و دانش لغوی فراگیران ایرانی زیر متوسط زبان انگلیسی و بر ماندگاری آن در حافظه می پردازد. به این منظور، تعداد شصت نفر از زبان آموزان ایرانی هشت تا چهارده ساله با...

Long-term Geomagnetic Indices and their Use in Inferring Solar Wind Parameters in the Past

We discuss three new geomagnetic indices [the Inter-Hour Variability (IHV), Svalgaard and Cliver (2007); the Inter-Diurnal Variability (IDV), Svalgaard and Cliver, 2005; and the Polar-Cap Potential (PCP) Index, Le Sager and Svalgaard (2004)], that are derivable from data available for a century or more. Each of these indices responds directly to either the solar wind magnetic field strength (B)...

A New Computational Intelligence Model for Long-Term Prediction of Solar and Geomagnetic Activity

This paper briefly describes how the neural structure of fear conditioning has inspired to develop a computational intelligence model that is referred to as the brain emotional learning-inspired model (BELIM). The model is applied to predict long step ahead of solar activity and geomagnetic storms.

The geomagnetic field variations and earthquake activity