Micromagnetics Simulation of Deep-Submicron Supermalloy Disks

The results of recent micromagnetic simulations of deep submicron supermalloy disks are presented. A recent experimental measurement of the hysteresis and magnetic domain structure in supermalloy disks with diameters ranging from 55 to 500 nm and thickness ranging from 6 to 15 nm has been reported. Our micromagnetic simulations show remarkable agreement with the experimental hysteresis loops. The simulation results show that for thin or small diameter disks a single magnetic domain exists with all spins aligned. The hysteresis loop represents free rotation of these spins. For larger diameter disks or as the thickness increases the hysteresis loops change shape due to the appearance of a single vortex state appearing at low applied fields

Micromagnetics Simulation of Nanoshaped Iron Elements: Comparison with Experiment

A micromagnetics simulation has been conducted on nanostructured magnetic elements of iron in order to investigate the effect of the shape of the element on magnetic properties, such as domain formation and hysteresis loops. These results are compared with recent experimental studies. The results display an impressive agreement with both the experimentally observed magnetic domains in individual particles as well as the shape of the hysteresis loops. The simulation results then explain features in the hysteresis loops in terms of vortice formation and motion

A Comparison of the Rough Sphere Rotational Diffusion Model with Experimental Results for Liquid Methyl Iodide

No abstract available

Impact of Recent Tax Legislation on Small Business

This paper discusses selected changes in the tax laws, made in the Summer of J 996, which are expected to have significant impact on small businesses.  The general areas discussed are 1) S Corporations, 2) SIM PLE pension plans, 3) independent contractors, 4) leased employees, 5) expensing qualified small business assets, 6) the work opportunity tax credit, 7) life insurance policy loans, and 8) medical savings accounts. In each case, we first discuss the basic importance of the issue to small business and then briefly discuss some of the technical issues involved in applying the new laws

Opium in Afghanistan lessons learned from the counterdrug strategies of Colombia

The paper conducts an analysis of the current counterdrug operation in Afghanistan and analyzes how these operations affect the counterinsurgent operations against the Taliban. This analysis will be conducted by examining the Taliban's control of opium cultivation to support their operations, determine how the people of Afghanistan rely upon the profits of opium for their livelihood, and identify possible solutions to the opium trade that will not alienate the people of Afghanistan from the Afghan government or Coalition Forces. This study will utilize a case study on Colombia in order to examine the policies implemented in an attempt to control the country's illicit cocaine trade. The intent of this study can be explained in four steps. First is to examine counterdrug strategies. Second is to conduct a case study of Colombia in order to examine the strategies used to counter their illicit drug trade. Third is to gain an understanding of what drives the Afghan people to produce opium, and how the Taliban exploits this need. Fourth is the recommendation of a proper counterdrug strategy to be implemented in Afghanistan.http://archive.org/details/opiuminafghanist109454324US Army (USA) author.Approved for public release; distribution is unlimited