Urban forest cover of the Chicago region and its relation to household density and income

Urban forests and herbaceous open space play a vital role in the environmental and aesthetic health of cities, yet they are rarely identified in land-use inventories of urban areas. To provide information on urban forests and other vegetative land cover in Illinois cities, Landsat Thematic Mapper (TM) data from June 27, 1988, were classified for the Chicago metropolitan region (9,717 km²). Ten land-cover classes were identified, including two types of forestland (occupying 5.8% of the total area), residential land with trees (14.6%) or without trees (7.8%), cropland (37.5%), two types of grassland (7.7%), urban with impervious surfaces (23.1%), water (1.6%), and miscellaneous vegetation (2.1%). Correlation analyses indicated that household income and household density are strongly related to land covers in the region, particularly those with tree cover and urbanized land. Population changes for 1980–1985 and 1985–2010 (projected) show a pattern of increasing density in the urbanized zone concurrent with continued urban sprawl, primarily into current cropland.     

What Determines Trust in Information About Food-Related Risks? Underlying Psychological Constructs

Trust in risk information about food related-hazards may be an important determinant of public reactions to risk information. One of the central questions addressed by the risk communication literature is why some individuals and organizations are trusted as sources of risk information and others are not. Industry and government often lack public trust, whereas other sources (for example, consumer organizations, the quality media, medical doctors) are highly trusted. Problematically, previous surveys and questionnaire studies have utilized questions generated by the investigators themselves to assess public perceptions of trust in different sources. Furthermore, no account of the hazard domain was made. In the first study reported here, semistructured interviewing was used to elicit underpinning constructs determining trust and distrust in different sources providing food-related risk information ( n = 35). In the second study, the repertory grid method was used to elicit the terminology that respondents use to distinguish between different potential food-related information sources ( n = 35), the data being submitted to generalised Procrustes analysis. The results of the two studies were combined and validated in survey research ( n = 888) where factor analysis indicated that knowledge in itself does not lead to trust, but that trusted sources are seen to be characterised by multiple positive attributes. Contrary to previous research, complete freedom does not lead to trust—rather sources which possess moderate accountability are seen to be the most trusted.     

New Organizational Forms for Competing in Highly Dynamic Environments: the Network Paradigm

Turbulence and rapid change in the business environment have been associated for some time with the development of new network organizational forms which put various types of strategic alliance and other inter-organizational collaborations into effect. This paper traces the rationale for the formation of such networks and the associated vertical disaggregation of functions and implications for internal organizational design. This leads to the proposal of a classification framework for network forms. Using the dimensions of volatility of environmental change on the one hand, and the type of inter-organizational relationship involved (collaborative or transactional) on the other hand, network forms are classified as: hollow networks, flexible networks, value-added networks and virtual networks. In each case it is possible to identify the environmental and organizational contingencies most likely to be associated with the emergence and adoption of a particular type of network arrangement. This argument leads to the identification of a new research agenda which has the goals of developing more robust conceptualizations of network characteristics; better understanding the contingencies surrounding the emergence of network forms and their relative efficiencies and specifying some of the major implications of network formation for internal organizational design. In parallel the paper identifies a number of managerial implications for setting strategic priorities and developing appropriate management systems in these new organizational contexts.     

Competitive Advantage, Quality Strategy and the Role of Marketing

The improvement of product and service quality has been widely discussed in the literature as an appropriate competitive strategy for achieving sustainable competitive advantage. However, neither the linkage between competitive strategy and quality, nor the role of marketing in the implementation of quality-based competitive strategy, has received detailed attention in the marketing and strategy literatures. This paper explores the interface between marketing and quality management in seller organizations, by developing a contingency model of quality strategy. This model is grounded in the literatures of marketing, strategy and quality management, and the perceptions of managers uncovered in exploratory interviews.     

Control of interrelated research and development projects

The purpose of this paper is to examine a type of resource allocation problem arising in the context of research and development activities. The particular problem analyzed involves scheduling a group of projects in such a way that total cost is minimized while several precedence relations are satisfied and specific completion times are maintained. The primary difficulty results from the existence of commonalities that allow the successful completion of a particular project to be applied to several different purposes. A solution approach is developed which combines a one-pass network algorithm to deal with the precedence and time restrictions and a dynamic programming procedure to allocate the resources to each project.     

A methodological strategy for a one-number census in the UK

As a result of lessons learnt from the 1991 census, a research programme was set up to seek improvements in census methodology. Underenumeration has been placed top of the agenda in this programme, and every effort is being made to achieve as high a coverage as possible in the 2001 census. In recognition, however, that 100% coverage will never be achieved, the one-number census (ONC) project was established to measure the degree of underenumeration in the 2001 census and, if possible, to adjust fully the outputs from the census for that undercount. A key component of this adjustment process is a census coverage survey (CCS). This paper presents an overview of the ONC project, focusing on the design and analysis methodology for the CCS. It also presents results that allow the reader to evaluate the robustness of this methodology.     

Identity in political context: lesbian/gay representation in the public sphere

Discourses constructed to represent lesbians and gay men in the public sphere generate an essentialist identity which is both necessary and damaging. Legislative debate illustrates the production of a constrictive and homogeneous identity rejected by many gay/lesbian scholars and activists. Discussion of the rhetorical power of identity claims has produced alternative stances toward variant sexuality. This discussion can be advanced by challenging dominant constructions of civil rights and the public sphere.     

Changing food production and quality of diet in India, 1947-98

Systematic and critical evaluation, using food balance sheets, census population data, government surveys, food composition statistics, and estimates of the population's biological requirements, shows that the realized improvements in food supplies in India of the past five decades, while beneficial, have been insufficient to meet the nutritional needs of the average person in a population that grew from less than 350 million to nearly one billion during this period. The improvements also fall significantly short of meeting the needs of the clinically malnourished. Present per capita dietary energy intakes range from as high as 95 percent to as low as 50 percent of daily requirements. Additionally, comparison of past and present diets shows that as the composition of the diet has changed with time, its nutritional quality for many has deteriorated despite an apparent increase in overall food quantity. This has come about from changes in the production system that have emphasized wheat and rice crops at the expense of more nutritional pulses and coarse grains, and from widespread poverty that leaves high-quality animal foods beyond the means of most.