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This paper reports on a comparative evaluation of two computerised reference retrieval systems, INSTRUCT and PLEXUS. Instruct is a statistically‐based system based on best match searching and automatic index term weighting while Plexus uses expert systems techniques to improve access to a conventional Boolean search system. After an introduction to the retrieval techniques used by the two systems, their retrieval effectiveness is compared using a set of nineteen queries and 512 documents on the subject of gardening. The best results were obtained by using the terms suggested by the Plexus system as the basis for an Instruct search.

INSTRUCT is a multi‐user, text retrieval system which was developed as an interactive teaching package for demonstrating modern information retrieval techniques, these including natural language query processing, best match searching and automatic relevance feedback based on probabilistic term weighting. INSTRUCT has recently been extended and now additionally has facilities for query expansion using both relevance and term co‐occurrence data, for cluster‐based searching and for two browsing search strategies. These retrieval mechanisms are used to search a file of 26,280 titles and abstracts from the Library and Information Science Abstracts database; both menu‐based and command‐based searching are allowed.

Full‐text documents are usually searched by means of a Boolean retrieval algorithm that requires the user to specify the logical relationships between the terms of a query. In this paper, we summarise the results to date of a continuing programme of research at the University of Sheffield to investigate the use of nearest‐neighbour retrieval algorithms for full‐text searching. Given a natural‐language query statement, our methods result in a ranking of the paragraphs comprising a full‐text document in order of decreasing similarity with the query, where the similarity for each paragraph is determined by the number of keyword stems that it has in common with the query. A full‐text document test collection has been created to allow systematic tests of retrieval effectiveness to be carried out. Experiments with this collection demonstrate that nearest‐neighbour searching provides a means for paragraph‐based access to full‐text documents that is of comparable effectiveness to both Boolean and hypertext searching and that index term weighting schemes which have been developed for the searching of bibliographical databases can also be used to improve the effectiveness of retrieval from full‐text databases. A current project is investigating the extent to which a paragraph‐based full‐text retrieval system can be used to augment the explication facilities of an expert system on welding.

The Equal Pay Act 1970 (which came into operation on 29 December 1975) provides for an “equality clause” to be written into all contracts of employment. S.1(2) (a) of the 1970 Act (which has been amended by the Sex Discrimination Act 1975) provides:

From one angle, abortion law appears to confirm the regime politics account of the Supreme Court; after all, the Reagan/Bush coalition succeeded in significantly curtailing the constitutional protection of abortion rights. From another angle, however, it is puzzling that the Reagan/Bush Court repeatedly refused to overturn Roe v. Wade. We argue that time and again electoral considerations led Republican elites to back away from a forceful assertion of their agenda for constitutional change. As a result, the justices generally acted within the range of possibilities acceptable to the governing regime but still typically had multiple doctrinal options from which to choose.

The rise of East Asia to most dynamic center of processes of capital accumulation on a world scale is a phenomenon of the 1970s and 1980s. As a first approximation, the extent of this rise can be gauged from the trends depicted in figure 1. The figure shows the most conspicuous instances of “catching‐up” with the level of per capita income of the “organic core” of the capitalist world‐economy since the Second World War. As defined elsewhere, the organic core consists of all the countries that over the last half‐century or so have consistently occupied the top positions of the ranking of GNPs per capita and, in virtue of that position, have set (individually and collectively) the standards of wealth which all their governments have sought to maintain and all other governments have sought to attain. Broadly speaking, three regions have constituted the organic core since the Second World War: North America, Western Europe and Australasia (Arrighi, 1991: 41–2; Arrighi, 1990).

In this chapter, we explain why firms selectively responding to the most powerful, legitimate, and urgent demands of their stakeholders will not bring about sustainability and offer suggestions on what we should do in light of this shortcoming. Sustainability issues tend to be wicked problems that require cooperation across parties and over time to define and resolve. Stakeholder pressures can bring sustainability to the fore, but government intervention is necessary to drive meaningful action to resolve such issues. Without government intervention, self-interested stakeholders can pressure firms to move away from the complex, long-term challenges of wicked problems. Yet, stakeholder pressure is also necessary, as without it, industries may self-regulate in self-serving ways. Our analysis thus suggests that collaboration between business, government, and other stakeholders is necessary to resolve the wicked problems of sustainability. We therefore urge the stakeholder literature to move beyond its libertarian underpinnings by (re)incorporating government into models of effective corporate governance.

Public health programs facilitate access to resources that not only provide individuals’ options but also often foreclose individual preference through prescriptive requirements. This chapter takes two disparate cases from public health – vaccines and family planning –that reveal patterns of inequality in who has access to individual choice and who requires state support to exercise choice. Looking specifically at dynamics of funding and compulsion, this chapter elucidates how reliance on the rhetoric of individual choice as an expression of freedom rewards those with the greatest access to resources and fails to make sure that all members of the community have the resources to shape their own outcomes or to make sure collective health is protected.