Precise Electroweak Measurements at the Z0 Pole

Over the last decade, precise LEP and SLC measurements of electroweak coupling parameters at the Z0 pole have lead to tests of the Standard Model to unprecedented precision. This report presents a comprehensive review of these studies, including a review of relevant Z0 pole physics issues, facilities, instrumentation, and the measurements made. Global fits for the Higgs Boson mass and Z0-b coupling parameters are also presented.Comment: LaTex, 17 pages, 9 Postscript figures, uses ws-p8-50x6-00a.cls and epsfig.sty. Submitted to the Proceedings of the 1999 Conference on Physics in Collision, Ann Arbor, Michigan, June 24-26, 199

Experimental studies on the formation of lunar surface features by gas emission - A preliminary report

Experimental data on lunar surface features caused by gas emissio

Magnetization Reversal in Ferromagnetic Spirals via Domain Wall Motion

Domain wall dynamics have been investigated in a variety of ferromagnetic nanostructures for potential applications in logic, sensing, and recording. We present a combination of analytic and simulated results describing the reliable field driven motion of a domain wall through the arms of a ferromagnetic spiral nanowire. The spiral geometry is capable of taking advantage of the benefits of both straight and circular wires. Measurements of the in-plane components of the spirals\u27 magnetization can be used to determine the angular location of the domain wall, impacting the magnetoresistive applications dependent on the domain wall location. The spirals\u27 magnetization components are found to depend on the spiral parameters: the initial radius and spacing between spiral arms, along with the domain wall location. The magnetization is independent of the parameters of the rotating field used to move the domain wall, and therefore the model is valid for current induced domain wall motion as well. The speed of the domain wall is found to depend on the frequency of the rotating driving field, and the domain wall speeds can be reliably varied over several orders of magnitude. We further demonstrate a technique capable of injecting multiple domain walls and show the reliable and unidirectional motion of domain walls through the arms of the spiral