XV. Vortex statics

Statics and Fast Dynamics of Nanomagnets with Vortex Structure

Within the framework of the Landau-Lifshitz-Gilbert equation, using permalloy parameters, we study the statics and dynamics of flat circular magnetic nano-structures with an in-plane magnetic vortex configuration, putting particular emphasis on the vorticity of the magnetic state and on the (perpendicular) polarisation of the vortex center, which may be shifted with respect to the center of the...

Xv Xvi

-Monetary policy operates in a different environment than it did a decade ago. Financial market innovations have eroded the distinctions among monetary assets, making the definition of money increasingly arbitrary. Deregulation of interest rates and banking activity is changing the behavior of the monetary aggregates, as banks pay interest on monetary assets and nonbanks offer monetary-like ass...

XV. Geriatrics

Xv. Neurophysiology*

Resting squid nerve membrane actively extrudes Na+ against a large concentration gradient, while another cation, K + , is concentrated passively within the cell by the Donnan equilibrium. During the passage of an impulse, large transient current flows across the membrane; some K + leaves, some Na + enters, but which ions carry the current at which instant, and how it is turned on and off cannot...

Xv Xvi

The stock market crash of 1987 sent shock waves through the world's financial markets. Stock exchanges in New York, Chicago, London, Tokyo, Frankfurt, and a host of other cities suffered major declines. In response, credit markets, commodity markets, and foreign exchange markets registered sharp swings. Not since the Great Depression had the world seen such turmoil in financial markets. But, dr...