A Zero‐One Programming Model for Contiguous Land Acquisition

The land acquisition problem is a spatial partitioning problem that involves selecting multiple parcels to be acquired for a particular land use. Three selection criteria are considered: total cost, total area, and spatial contiguity. Achieving contiguity or connectivity has been problematic in previous exact methods for land acquisition. Here we present a new zero‐one programming model that enforces necessary and sufficient conditions for achieving contiguity in discrete cell landscapes, independent of other spatial attributes such as compactness. Computational experience with several demonstration problems is reported, and results and extensions are discussed.     

The limits of engagement: British foreign policy and the crisis in Zimbabwe

This article examines how the British government has responded to Zimbabwe’s ongoing crisis. This case raises several wider issues for British foreign policy, most notably the question of how much leverage London can exercise on the international scene in general, and over relatively small and weak states like Zimbabwe in particular. Zimbabwe’s crisis also raises profound questions about the appropriate balance between bilateral and multilateral policies, and between engaging in public criticism and conducting so–called ‘quiet diplomacy’. While bilateralism clearly has not worked, multilateralism has revealed its own frustrations, especially given the reluctance of many African elites within a number of organizations to criticize President Mugabe’s policies. This reluctance threatens to unravel the British Labour government’s stated objectives in Africa while at the same time raising important doubts over the credibility of the New Partnership for Africa’s Development (NEPAD), and whether an ‘Africa moment’ can be discerned in the manner articulated by prime minister Tony Blair.     

“The apple of my eye”: Carl Sauer and historical geography

Many historical geographers would claim Sauer to be one of them. Yet, with the exception of his Foreword to historical geography (1941) he made no major declaration of his interest in the sub-discipline. This paper attempts to examine Sauer's attitude to the time element in geography through a close appraisal of his published work but particularly through his hitherto unpublished correspondence. It soon becomes evident that Sauer changed his ideas during his long working life, and that it is difficult to disentangle Sauer's philosophy about the time element in geography from his philosophy about life, particularly within university circles in the United States, and within American society in general. Sauer's comment to a student in 1936 that historical geography “is of course the apple of my eye” would seem to be demonstrated amply, but that historical geography was not a conventional methodology so much as a flexible metaphor to encompass the study of man on earth through time. It was also the vehicle for some of his prime concerns; scholarship, independent thought, opposition to bureaucracy, concern for human values and environmental quality, and deep distaste for the technological and scientific “fix”, particularly the solutions offered by the social sciences. It might repay contemporary historical geographers to take a close look at Sauer's academic and intellectual values.     

Personal,Political, Pedagogic: Challenging the Binary Bind in Archaeological Teaching,Learning and Fieldwork

In this paper, we consider how we can undercut the various binaries of gender and sexuality in archaeological practice and particularly in our teaching. We argue that taking an assemblage theory approach enables us to look at the multiplicity of identities of those practicing archaeology as different and intersecting assemblages that bring one another into being through their connections at different scales. In particular, we examine how this approach can be applied to archaeological pedagogy and how this in turn enables us to move away from modern binary distinctions about sex and gender identities from the ‘bottom up’, fostering an approach in our students that will then go on to be developed in professional practice.     

Innovations in the afterlife of the Cold War: German-language human geography

This commentary will coalesce around two main points. First, the articles by Markus Hesse on urban geography, by Annika Mattissek and Georg Glasze on recent developments in discourse-analytic approaches, and by Ulrich Best on the genealogy of radical–Marxist or critical German-language geography all support the contention that key features of Germanophone human geography still mark it out as a ‘Cold War’ human geography. As will become clear, this contention goes well beyond noting the marginality (until recently) of radical–Marxist positions (Belina, B., Best, U., & Naumann, M. (2009). Critical geography in Germany: From exclusion to inclusion via internationalization. Social Geography, 4, 47–58). Second, I will argue that although this configuration has had real costs, including both analytic and ‘civic’ deficits, it has also allowed the development of distinctive strengths and innovative emphases in human geographic research that can and should be engaged by other sub-communities in the international discourse.     

Development of a systems model to visualise the complexity of children's independent mobility

Substantial changes to the built environment, urbanisation patterns, and societal norms have contributed to limiting children's opportunities for being independently mobile. Several linear causal pathway models have been developed to understand the influences on children's independent mobility; however feedback loops between and within the various levels of influence cannot be modelled using such an approach. The purpose of this paper is to refine the interrelationships of factors related to children's independent mobility, taking into account earlier models, broader contextual factors, recent children's geographies literature, and feedback loops. Systems model components were informed by attributes known to influence children's independent mobility, related qualitative findings, and the development of a framework that could lend itself to multilevel modelling approaches. This systems model may provide a useful structure for identifying how best to develop and monitor interventions to halt the declining rates of children's independent mobility.