Experimental Boat and Ship Archaeology: Principles and Methods

The need for experiments to study physical aspects of craft of the past is stated, as well as the necessity for them to have clear aims and to follow the established principles of scientific enquiry. These principles are discussed in this joint paper by ten maritime archaeologists and others, together with methods and some points of management critical to their application in this field.     

Reproduction, Representation and Authenticity: A Rereading

This essay argues for the moral necessity of retaining connections between the practices of representation and the ideal of authenticity. Using the example of racial representation, the author finds in the political philosophy of Charles Taylor and the cultural criticism of George Steiner resources for engaging in a creative dialogue with the history of our own tradition.     

The Political Economy of Environmental Policy Reform in Latin America

Many parts of the world are threatened with environmental damage and degradation, affecting both the natural resources and the economy of the area. This article analyses the factors affecting the likelihood of different environmental policy reforms in Latin America, with particular emphasis on: the strengths and weaknesses of different groups which promote such reforms; the degree to which the reforms are compatible with the region's current economic policies; and how the type of political regime affects these issues. It reaches the conclusion that, although there has been progress in recent years, the possibility of carrying out far-reaching reforms which could substantially reduce pollution and resource depletion has been limited by: 1) the difficulties involved in linking environmental issues with concerns for social justice; 2) economic policies which promote the exploitation of natural resources and labour and weaken the public sector; and 3) the great influence over regional governments of groups with vested interests in continuing environmentally destructive activities.     

THE OPTIMAL LOCATIONS OF BRANCH FACILITIES AND MAIN FACILITIES WITH CONSUMER SEARCH*

ABSTRACT. This paper examines the socially optimal locations of branch facilities (or small stores) and main facilities (or large stores) on a finite linear market that is uniformly populated from position 0 to position 1. Each consumer has a probability w of finding the desired service (or product) at a branch facility, and a probability 1 of finding the desired service (or product) at a main facility. Two types of consumer search are considered: phone search and visit search. Different assumptions are made about the numbers of branch facilities and main facilities (each involving one or two facilities of each type). Under visit search, the socially optimal locations of branch facilities tend to be closer to main facilities than under phone search, and this tendency is more pronounced for smaller values of w.     

Markov Models of Inertia and Dynamism on Two Contiguous Ohio Landscapes

This study examined landcover change during 1940–1988 in two contiguous landscapes of approximately 12,400 hectares in central Ohio, USA: an inertial till plain area and a more dynamic moraine area. Agriculture dominated both landscapes throughout, however, the cover of natural vegetation and urban-suburban development increased over time on the moraine while natural vegetation decreased and agriculture increased on the till plain. Markov process models for landcover change were constructed for three 14–17-year time intervals and for the entire forty-eight-year study period. Probabilities of self-replacement for agricultural lands (0.91–0.97) were higher and those for forests (0.54–0.65) lower than those reported for other landscapes. Predictions of landcover percentages for fifty years in the future were made using Markov process models derived from actual cover changes in 1940–1957, 1971–1988, and 1940–1988. All three models produced similar predictions for the inertial till plain area. In contrast, the three models' predictions differed considerably for the moraine area. Only the 1971–1988 transition matrix was sensitive to increases in urbanization and reforestation which began on the moraine in the 1970s. These results indicate that reliance on lengthy study intervals and net rates of change can obscure spatial and temporal patterns of landcover change that are caused by natural and socioeconomic factors operating on shorter time scales.     

Sustainable transport planning and the Dublin transportation initiative

The concept of sustainability has become a significant consideration in planning in Europe and the US. At both the international and the national level, urban planners and policymakers have developed a package of policies designed to produce sustainable growth and development. In transport, this has been interpreted to mean that we need to increase accessibility while we reduce mobility by shifting trips from automobile to walking, bicycle or public transport modes. Using this criteria, the latest Dublin transport plan has been found to be only partially effective. Similar to many American transport plans, the DTI has opted for the infrastructure‐related sustainability policies and avoided the less popular economic disincentives.     

Neo-Corporatism and Environmental Policy

The ecologically sustainable development (ESD) process represented a significant attempt by the Commonwealth Government to involve pro-environment and pro-development protagonists in a major environmental consultative forum. The government's inclusion of peak interest organisations into an exclusive consultation process resembles a neo-corporatist approach to interest intermediation. However, neo-corporatist theory has been applied almost exclusively to economic policy areas and interest organisations representing capital, labour and the state. Analysing the involvement of select environmental organisations in the ESD process, this paper argues that neo-corporatist theory can be extended to include non-production-based interest organisations. The implications of environmental organisation participation in a neo-corporatist structure are examined, including a discussion of the tension between neo-corporatist and new social movement theories.     

SPATIAL DEPENDENCY OF SEGREGATION INDICES

A few researchers have mentioned the scale sensitivity of segregation index, D. In this paper, I discuss analytically and empirically why using large enumeration areal units usually results in low segregation measures, and using small areal units produces relatively high segregation measures. The discussion is also applicable to the multi-group variant of D. A major finding is that if people of the same ethnic groups are positively spatially auto-correlated, increasing the size of areal units of analysis may not lower D initially, because only people of the same group are added. But enlarging the areal units subsequently may include population of other ethnic groups, and therefore could lower D. However, if the boundaries of the larger enumeration units are drawn to include only population of the same group, then D will not change significantly. Both the spatial autocorrelation of ethnic group population and zonal pattern are critical factors in determining the scale sensitivity of D.