Hall conductance of a pinned vortex lattice in a high magnetic field

We calculate the quasiparticle contribution to the zero temperature Hall conductance of two-dimensional extreme type-II superconductors in a high magnetic field, using the Landau basis. As one enters the superconducting phase the Hall conductance is renormalized to smaller values, with respect to the normal state result, until a quantum level-crossing transition is reached. At high values of the order parameter, where the quasiparticles are bound to the vortex cores, the Hall conductance is expected to tend to zero due to a theorem of Thouless.Comment: To appear in Journ. Phys. : Cond. Matte

Regional scale simulation of atmospheric structure using VAS data

Investigations with both Subsynoptic Scale Model (SSM) and Limited Area Mesoscale Prediction System (LAMPS) are directed at model static initializations using Visible Infrared Spin Scan Radiometer Atmospheric Sounder (VAS) derived temperatures and moistures and also satellite derived winds. The general approach for each day's case study is similar. A 12-hour control forecast (no satellite data) is made 12Z-OZ, using a radiosonde analysis at 12Z as the initial field. For the satellite data experiments, reanalyses are performed at intermediate times, using VAS soundings or VAS soundings in combination with satellite winds. Forecasts are subsequently made from the reanalysis time(s) to the same validation hour (OZ) as the control forecasts. Comparisons are then made between the control forecast and satellite experiments

A New Focus for the Future: Historic Preservation Practices and Vocational High School Curriculum, a Massachusetts Concentration

Graduates of vocational high schools account for the largest group of trade professionals in the construction and remodeling industry. The various concentrations provide prospective graduates with the skills, knowledge and education they need to succeed in the industry. After graduation former students are prepared to hold several different jobs in the industrial, commercial and residential areas; some work as independent contractors for various clients and projects, while others may be hired by firms on an ongoing basis. The issue exists that although these types of vocational schools are producing valuable assets to the community they seem to promote construction and operation of only new buildings and demolition of historic buildings and sites. This accounts for 48% the United States\u27 greenhouse gas emissions. Reusing and retrofitting our existing buildings can reduce these emissions dramatically while enhancing the community. In fact, our existing buildings are one of our greatest renewable resources and are responsible for a large number of trade related jobs. The graduates, although skilled in their individual trades retain very little knowledge of the concept and practices of Historic Preservation. Within our communities, individuals that retain the basic knowledge of Historic Preservation practices play a critical role in creating a unique sense of place that adds value to our cities, towns and countryside. Students may develop skills, both vocational and academic, that will give them the strategic labor market advantages needed to compete for good jobs. The importance of recognizing historic resources also guides us as we move forward into the future, for without them we have no measure by which to gauge our progress. Remember, historic preservation is not only economical, sustainable and a good practice...its law

The influence of frame pitch and stiffness on the stress distribution in pressurised cylinders

An analysis is made of the stresses occurring in stringer reinforced cylinders due to the restraining action of the frames. Graphs are presented showing the effect of variation in frame pitch and stiffness, on the bending moment and shear force in the skins, and the hoop stress in the skins between frames. The results are used to show how the optimum structural geometry can be chosen for any given stress ratios