This paper presents results from the numerical investigation of nonlinear feedback interactions between ULF field-aligned currents (FACs) and ionospheric plasma in global magnetospheric resonator with a non-symmetrical distribution density conjugate hemispheres. The asymmetry is enhanced by introduction valley hemisphere where already lower. main result this study that resonator, mechanism, dri...

We present a simple and efficient method for the extraction of thermal channel noise of MOS FET’s in quarter and sub-quarter micron technologies from NF50 (noise figure at 50 Ohm source resistance) measurements. For shorter channel lengths the experimental results shows a continuously rising deviation from the classical long channel theory [1]. For a 0.18 μm technology a γ≈6 instead of 2/3 in s...

Abstract This article provides a comprehensive history of default risk for newly originated home mortgages in the USA over past quarter century. The loan-level source data include entire guarantee book Fannie Mae and Freddie Mac. We track many loan characteristics produce summary measure risk. Among our results, we show that mortgage had already risen 1990s, planting seeds financial crisis well...

A linear regression of y on x can be approximated by a simple difference: the average values of y corresponding to the highest quarter or third of x, minus the average values of y corresponding to the lowest quarter or third of x. A simple theoretical analysis shows this comparison performs reasonably well, with 80%–90% efficiency compared to the linear regression if the predictor is uniformly ...