The covariant scattering and cohomology of W3W_3 strings

A general formalism for covariant $W_3$ string scattering is given. It is found necessary to use screening charges that are constructed from the $W_3$ fields including ghosts. The scattering amplitudes so constructed contain within them Ising model correlation functions and agree with those found previously by the authors. Using the screening charge and a picture changing operator, an infinite number of states in the cohomology of Q are generated from only three states. We conjecture that, apart from discrete states, these are all the states in the cohomology of Q.Comment: 36 pages, KCL-TH-93-

What Workers Say: Employee Voice in the Anglo-American Workplace

[Excerpt] This book is about employee voice in the workplaces of the highly developed Anglo-American economies: the United States, Canada, the United Kingdom, Ireland, Australia, and New Zealand. These are among the most economically successful countries in the world. Despite being located in three different geographic areas, the Anglo-American countries have a common language and legal tradition, have close economic and political ties, and are linked by flows of people, goods, and capital. Many of the same firms operate in each country. The unions in each pay more attention to their counterparts within the group than to unions in other countries. The Anglo-American brand of capitalism – market oriented and open to competition, with modest welfare sates and income transfer systems – differentiates the countries from countries in the “social dialogue” model of the European Union (although the United Kingdom and Ireland are part of the Union) and from the highly unionized labor system in Scandinavia

Requirements for software engineering languages

This paper analyzes the concepts of software construction embodied in the Draco system. The analysis relates specific mechanisms in Draco to particular software engineering (SE) principles and suggests future research needed to extend the approach. The purpose of the analysis is to help researchers understand Draco better and thus be able to direct in productive directions future research on this type of software engineering tool

Towards a theory of software engineering

A theory of software engineering (SE) is presented and its application to explaining and analysing SE situations is illustrated. The theory is based on a characterization of SE representations and the fundamental activities that are applied to them. Motivations for developing a theory and means of establishing its validity are also discussed

The GLA’s London Workforce Employment Series

This article describes the construction of the workforce employment data used by the Greater London Authority. It reproduces, in citable form and, for scholarly purposes, the report of the same name produced by the author for the Greater London Authority. This article describes the sources of this data and explains where they can be found. Workforce employment data is a vital resource for many cities, underpinning many city planning decisions Other important data about cities , such as estimates of its economic output, often depend on it. To build a reliable picture of London’s economy, it is essential to understand where its estimates of workforce employment come from, what information they provide and how reliable they are. The report explains what the term ‘workforce employment’ actually means, looks at the data sources that are used to obtain it, and discusses some of their limitations. Appendix A, compiled by Peter Urwin of the University of Westminster, contains a study the GLA commissioned from Westminster University which analyses discrepancies between the UK’s two main primary sources of employment data – the Labour Force Survey (LFS) and the Annual Business Inquiry (ABI). Finally, it explains how GLA Economics selects and compiles its workforce employment series. Appendix B, compiled by Experian Business Studies, explains the statistical methods used to construct the data from the primary sources.Keywords: Labour Market; Minimum Wage; Living Wage

Reliable software through rational design

This paper describes two (related) ways that software unreliability may occur: in response to unanticipated demands or due to unreliable design processes. Five illustrative examples of design-induced unreliability are presented. Design rationalization, a technique for forcing careful and rational consideration of design decisions, is described and its use to improve the reliability of a design process is illustrated. Some experimental and abstract evidence supporting the use of design rationalization to increase software reliability is given