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The placement of facilities according to spatial and/or geographic requirements is a popular problem within the domain of location science. Objectives that are typically considered in this class of problems include dispersion, median, center, and covering objectives—and are generally defined in terms of distance or service‐related criteria. With few exceptions, the existing models in the literature for these problems only accommodate one type of facility. Furthermore, the literature on these problems does not allow for the possibility of multiple placement zones within which facilities may be placed. Due to the unique placement requirements of different facility types—such as suitable terrain that may be considered for placement and specific placement objectives for each facility type—it is expected that different suitable placement zones for each facility type, or groups of facility types, may differ. In this article, we introduce a novel mathematical treatment for multi‐type, multi‐zone facility location problems. We derive multi‐type, multi‐zone extensions to the classical integer‐linear programming formulations involving dispersion, centering and maximal covering. The complexity of these formulations leads us to follow a heuristic solution approach, for which a novel multi‐type, multi‐zone variation of the non‐dominated sorting genetic algorithm‐II algorithm is proposed and employed to solve practical examples of multi‐type, multi‐zone facility location problems.  相似文献   

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Globally, sea‐level rise is expected to impact on many coastal regions and settlements. While mitigation of global greenhouse gas emissions remains an important task, adaptation is now seen as a critical component of the policy equation. Local government is a key player in adaptation planning and managing risk through their mandated role in land use planning and development control. Yet, managing the predicted impacts of climate change is proving to be a complex and difficult task for planners and policy makers. This paper reports on a case of local government deliberation on possible planning responses to address future sea‐level rise impacts in New South Wales, Australia. Using structured, expert opinion of planners and other technical experts engaged in a collaborative network in the Sydney region, we explore the feasibility of implementing planning and policy measures at the local and regional scales to respond to inundation risk as a result of sea‐level rise and storm surge events. Our research shows how local governments employ specific scale‐oriented strategies to engage private and public actors at different scales to manage legal, financial, and technical risks in coastal adaptation.  相似文献   

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This article examines the question of the existence of non‐Adamic persons — both terrestrial and extra‐terrestrial — in early modern Europe. More particularly it looks at how the existence of non‐Adamites seriously called into question the credibility of the central themes of the Christian story of the creation, fall and redemption in Jesus Christ in early modern Europe. It analyses the impact on the Christian view of history caused by the discovery of the inhabitants of the New World, speculations about the polygenetic origins of the human race, and discussions about the plurality of worlds. It concludes with some reflections on the monogenetic and polygenetic accounts of the origin of humans in a post‐Darwinian context.  相似文献   

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A rare defect of the sacrum was observed in the skeleton of an adult female from the Quaker Cemetery (1663–1814 CE) in Kingston‐upon‐Thames, England. This is an isolated finding in the skeletal collection and no other elements in this individual were similarly affected. After eliminating post‐depositional damage and skeletal asymmetry, a differential diagnosis resulted in the consideration of two conditions: hemivertebra and sacral agenesis, both of which are rare developmental defects that originate during foetal growth. Although the defect is interesting from an embryological, genetic and palaeopathological perspective, it would have resulted in few clinical symptoms for the individual. This case adds to the limited knowledge of the morphological variability of the sacrum, and will aid in future diagnoses of these rare pathological conditions. Copyright © 2009 John Wiley & Sons, Ltd.  相似文献   

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Matthew Brown  Karen Tucker 《对极》2017,49(5):1186-1203
This article aims to prompt reflection on the ways in which digital research methods can support or undermine participatory research. Building on our experiences of working on the Quipu Project ( quipu‐project.com ), an interactive, multimedia documentary on unconsented sterilisation in Peru, it explores the ways in which digital technologies can enable participatory knowledge production across geographic, social and linguistic divides. It also considers the new forms of engagement between knowledge‐producers and audiences that digital methods can encourage. Digital technologies can, we contend, help build new spaces for, and modes of engagement with, participatory research, even in contexts such as the Peruvian Andes where digital technologies are not well established or commonly used. Doing so, we argue, entails responding sensitively to the social, linguistic and digital inequalities that shape specific research contexts, and centring the human relationships that are easily sacrificed at the altar of technological innovation.  相似文献   

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Research design can be elegant but rarely does good research embarking on a new and complex area travel in a straight line. This article briefly describes the winding journey of three investigators, two Kuwaitis, a sociologist and the other asocial work researcher, and one American psychologist. Their goal was to tale the emotional pulse of Kuwait in the shadows of fifteen years of Iraq‐induced trauma. Along the way they adopt an indigenous focus that lead them to invent a measure of Raha (wellbeing) especially suited for studying Kuwaitis. The latter portion of the paper describes the procedures and results of the development of the Kuwaiti Raha Scale, ending with a discussion of the implications for international research in the social sciences. This study was funded by the Kuwait Foundation for the Advancement of Science (KFAS).  相似文献   

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Recent excavations by V.I. Sarianidi in the so‐called ‘royal necropolis’ of Gonur Depe North, in southern Turkmenistan, have brought to light the first unequivocal example of an Umm an‐Nar‐type soft‐stone compartmented vessel ever found in Central Asia. The find is discussed in light of other evidence of links between Central Asia, south‐eastern Arabia and Bahrain.  相似文献   

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This article examines the central influence of anti‐Catholicism upon English‐Canadian nationalism in the first third of the twentieth century. Anti‐Catholicism provided an existing rhetorical and ideological tradition and framework within which public figures, intellectuals, Protestant church leaders and other Canadians communicated their diverse visions of an ideal Canada. The study of anti‐Catholicism problematises the rigid separation that many scholars have posited between a conservative ethnic nationalism and a progressive civic nationalism. Often times these very civic values were inextricable from a context of Britishness. In addition, anti‐Catholicism was not simply about theological differences between Protestants and Catholics. Instead this theological thread often intersected with the perceived socio‐political problems that Catholics and Catholicism posed. Hostility to Catholicism was not limited only to fraternal organisations such as the Orange Order; indeed the importance of anti‐Catholicism as a component of Canadian nationalism lies in its presence across the political and intellectual spectrum. Catholicism was perceived to inculcate values antithetical to British traditions of freedom and democracy.  相似文献   

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