A transient solution for domain wall motion

An analytic solution of transient wall motion in a bulk ferromagnetic material is obtained from the dynamic torque equations with a Gilbert damping term. The steady state solution reduces to previously obtained, well known solutions

Transient and steady-state velocity of domain walls for a complete range of drive fields

Approximate analytic solutions for transient and steady-state 180 deg domain wall motion in bulk magnetic material are obtained from the dynamic torque equations with a Gilbert damping term. The results for the Walker region in which the transient solution approaches the familiar Walker steady-state solution are presented in a slightly new form for completeness. An analytic solution corresponding to larger drive fields predicts an oscillatory motion with an average value which decreases with drive field for reasonable values of the damping parameter. These results agree with those obtained by a computer solution of the torque equation and those obtained with the assumption of a very large anisotropy field

Wall contraction in Bloch wall films

The phenomenon of wall contraction characterized by a peak in the velocity field relationship and a region of negative differential mobility is observed. Uniaxial magnetic thin films of various compositions and magnetic properties are studied in careful interrupted pulse experiments. The observed results agree quite well with the theory for bulk samples

A Study of the In-Service Education Programs Available to Elementary Principals in Spokane, Stevens and Whitman Counties

The purpose of this study was to ascertain the availability of in-service education programs to elementary principals in a selected geographical area, to determine who planned the programs, what types of programs were available and what areas of study were included in these programs

Low frequency creep in CoNiFe films

The results of an investigation of domain wall motion excited by slow rise-time, bipolar, hard-axis pulses in vacuum deposited CoNiFe films 1500A to 2000A thick are presented. The results are consistent with those of comparable NiFe films in spite of large differences in film properties. The present low frequency creep data together with previously published results in this and other laboratories can be accounted for by a model which requires that the wall structure change usually associated with low frequency creep be predominately a gyromagnetic process. The correctness of this model is reinforced by the observation that the wall coercive force, the planar wall mobility, and the occurrence of an abrupt wall structure change are the only properties closely correlated to the creep displacement characteristics of a planar wall in low dispersion films

Signal Processing

Contains reports on two research projects.Joint Services Electronics Programs (U. S. Army, U. S. Navy, and U. S. Air Force) under Contract DAAB07-71-C-030

Merger of Law and Equity under the Revised Maryland Rules: Does It Threaten Trial by Jury?

With the merger of law and equity effected by revisions to Maryland\u27s Rules of Civil Procedure, adopted on July 1, 1984, the Maryland judiciary must define the scope of trial by jury to be permitted in the now merged civil actions. This article examines the federal and various state approaches and sets forth alternatives available to Maryland courts. The authors posit that Maryland\u27s judges should define the scope of the jury trial right in the merged system by recognition of established equitable functions. The right to trial by jury should be preserved, not by blindly following the federal approach, but by applying Maryland\u27s traditional limitations on equitable jurisdiction

Merger of Law and Equity under the Revised Maryland Rules: Does It Threaten Trial by Jury?

With the merger of law and equity effected by revisions to Maryland\u27s Rules of Civil Procedure, adopted on July 1, 1984, the Maryland judiciary must define the scope of trial by jury to be permitted in the now merged civil actions. This article examines the federal and various state approaches and sets forth alternatives available to Maryland courts. The authors posit that Maryland\u27s judges should define the scope of the jury trial right in the merged system by recognition of established equitable functions. The right to trial by jury should be preserved, not by blindly following the federal approach, but by applying Maryland\u27s traditional limitations on equitable jurisdiction

Study of helicopterroll control effectiveness criteria

A study of helicopter roll control effectiveness based on closed-loop task performance measurement and modeling is presented. Roll control critieria are based on task margin, the excess of vehicle task performance capability over the pilot's task performance demand. Appropriate helicopter roll axis dynamic models are defined for use with analytic models for task performance. Both near-earth and up-and-away large-amplitude maneuvering phases are considered. The results of in-flight and moving-base simulation measurements are presented to support the roll control effectiveness criteria offered. This Volume contains the theoretical analysis, simulation results and criteria development

Surface immuno-functionalisation for the capture and detection of vibrio species in the marine environment: A new management tool for industrial facilities

© 2014 Laczka et al. Bacteria from the genus Vibrio are a common and environmentally important group of bacteria within coastal environments and include species pathogenic to aquaculture organisms. Their distribution and abundance are linked to specific environmental parameters, including temperature, salinity and nutrient enrichment. Accurate and efficient detection of Vibrios in environmental samples provides a potential important indicator of overall ecosystem health while also allowing rapid management responses for species pathogenic to humans or species implicated in disease of economically important aquacultured fish and invertebrates. In this study, we developed a surface immuno-functionalisation protocol, based on an avidin-biotin type covalent binding strategy, allowing specific sandwich-type detection of bacteria from the Vibrio genus. The assay was optimized on 12 diverse Vibrio strains, including species that have implications for aquaculture industries, reaching detection limits between 7×103 to 3×104 cells mL-1. Current techniques for the detection of total Vibrios rely on laborious or inefficient analyses resulting in delayed management decisions. This work represents a novel approach for a rapid, accurate, sensitive and robust tool for quantifying Vibrios directly in industrial systems and in the environment, thereby facilitating rapid management responses