p‐Functional Clusters Location Problem for Detecting Spatial Clusters with Covering Approach

Regionalization or districting problems commonly require each individual spatial unit to participate exclusively in a single region or district. Although this assumption is appropriate for some regionalization problems, it is less realistic for delineating functional clusters, such as metropolitan areas and trade areas where a region does not necessarily have exclusive coverage with other regions. This paper develops a spatial optimization model for detecting functional spatial clusters, named the p‐functional clusters location problem (p‐FCLP), which has been developed based on the Covering Location Problem. By relaxing the complete and exhaustive assignment requirement, a functional cluster is delineated with the selective spatial units that have substantial spatial interaction. This model is demonstrated with applications for a functional regionalization problem using three journey‐to‐work flow datasets: (1) among the 46 counties in South Carolina, (2) the counties in the East North Central division of the US Census, and (3) all counties in the US. The computational efficiency of p‐FCLP is compared with other regionalization problems. The computational results show that detecting functional spatial clusters with contiguity constraints effectively solves problems with optimality in a mixed integer programming (MIP) approach, suggesting the ability to solve large instance applications of regionalization problems.     

Location Modeling Utilizing Maximum Service Distance Criteria

The location set-covering problem (LSCP) and the maximal covering location problem (MCLP) have been the subject of considerable interest. As originally defined, both problems allowed facility placement only at nodes. This paper deals with both problems for the case when facility placement is allowed anywhere on the network. Two theorems are presented that show that when facility placement is unrestricted, for either the LSCP or MCLP at least one optimal solution exists that is composed entirely of points belonging to a finite set of points called the network intersect point set (NIPS). Optimal solution approaches to the unrestricted site LSCP and MCLP problems that utilize the NIPS and previously developed solution methodologies are presented. Example solutions show that considerable improvement in the amount of coverage or the number of facilities needed to insure total coverage can be achieved by allowing facility placement along arcs of the network. In addition, extensions to the arc-covering model and the ambulance-hospital model of ReVelle, Toregas, and Falkson are developed and solved.     

Spatial optimisation of fire service coverage: a case study of Brisbane,Australia

In the context of changing demand for fire services, spatial optimisation of fire coverage has attracted little scholarly attention despite its potential to improve emergency response and to inform future service planning for fire stations. Drawing on small area population forecasts, this paper extends the application of the Maximum Coverage Location Model to compute and delineate the spatial coverage of current and proposed new fire stations to align with population growth estimates for Brisbane, Australia. Our results reveal important gaps in fire cover that are likely to emerge as a result of predicted population growth, the spatial patterns of which varies across the Brisbane metropolitan area. We draw on these results to delineate a series of new potential sites for fire stations to ameliorate the reduction in spatial coverage as a consequence of predicted population growth demonstrating the utility of our analytic approach for decision‐making and operational planning in the fire services.     

A Constructive Genetic Algorithm for Discrete Dispersion on Point Feature Cartographic Label Placement Problems

This article concerns the point feature cartographic label placement (PFCLP) problem, which is a NP‐hard (Non‐deterministic Polynomial‐time hard) combinatorial problem. It is considered that when all points must be labeled and overlaps are inevitable, the map can be more readable if overlapping labels are placed in a dispersive way, that is, overlapping labels are distant from each other. This work presents a constructive genetic algorithm (CGA) for the discrete dispersion PFCLP that utilizes the notion of masking to preserve optimal subsequences in chromosomes. We also define the discrete dispersion PFCLP as a mixed integer linear programming model, considering the problem of the minimum number of labels in conflict as well. The computational results validate our CGA approach using instances up to 5,046 points.     

A Spatiotemporal Bayesian Hierarchical Approach to Investigating Patterns of Confidence in the Police at the Neighborhood Level

Public confidence in the police is crucial to effective policing. Improving understanding of public confidence at the local level will better enable the police to conduct proactive confidence interventions to meet the concerns of local communities. Conventional approaches do not consider that public confidence varies across geographic space as well as in time. Neighborhood level approaches to modeling public confidence in the police are hampered by the small number problem and the resulting instability in the estimates and uncertainty in the results. This research illustrates a spatiotemporal Bayesian approach for estimating and forecasting public confidence at the neighborhood level and we use it to examine trends in public confidence in the police in London, UK, for Q2 2006 to Q3 2013. Our approach overcomes the limitations of the small number problem and specifically, we investigate the effect of the spatiotemporal representation structure chosen on the estimates of public confidence produced. We then investigate the use of the model for forecasting by producing one‐step ahead forecasts of the final third of the time series. The results are compared with the forecasts from traditional time‐series forecasting methods like naïve, exponential smoothing, ARIMA, STARIMA, and others. A model with spatially structured and unstructured random effects as well as a normally distributed spatiotemporal interaction term was the most parsimonious and produced the most realistic estimates. It also provided the best forecasts at the London‐wide, Borough, and neighborhood level.     

A Multi‐disciplinary Approach to the Archaeological Investigation of a Bedrock‐Dominated Shallow‐Marine Landscape: an example from the Bay of Firth,Orkney, UK

Investigation of shallow‐marine environments for submerged prehistoric archaeology can be hampered in many localities by extensive bedrock exposure and thus limited preservation potential. Using the concept of ‘seamless archaeology’ where land‐based archaeology is integrated across the intertidal zone through to the offshore, a multi‐disciplinary approach is essential. This approach taken in the Bay of Firth, Orkney uses geophysics, historical archive and ethno‐archaeology, coastal geomorphology, palaeo‐environmental analyses and sea‐level science, and allows a clearer understanding of the landscape in which prehistoric settlers lived. While acknowledging the limitations of the preserved environment, we are successful in identifying areas of archaeological potential on the sea‐bed for both upstanding structural elements as well as sediment preservation that contains evidence for human occupation. This has wider implications beyond Orkney's World Heritage sites to provide a blueprint for similar studies elsewhere in the coastal zone. © 2012 The Authors     

Designing Reliable Center Systems: A Vector Assignment Center Location Problem

The p‐center problem is one of the most important models in location theory. Its objective is to place a fixed number of facilities so that the maximum service distance for all customers is as small as possible. This article develops a reliable p‐center problem that can account for system vulnerability and facility failure. A basic assumption is that located centers can fail with a given probability and a customer will fall back to the closest nonfailing center for service. The proposed model seeks to minimize the expected value of the maximum service distance for a service system. In addition, the proposed model is general and can be used to solve other fault‐tolerant center location problems such as the (p, q)‐center problem using appropriate assignment vectors. I present an integer programming formulation of the model and computational experiments, and then conclude with a summary of findings and point out possible future work.     

Contiguity Constraints for Single‐Region Site Search Problems

This paper proposes an explicit set of constraints as a general approach to the contiguity problem in site search modeling. Site search models address the challenging problem of identifying the best area in a study region for a particular land use, given that there are no candidate sites. Criteria that commonly arise in a search include a site's area, suitability, cost, shape, and proximity to surrounding geographic features. An unsolved problem in this modeling arena is the identification of a general set of mathematical programming constraints that can guarantee a contiguous solution (site) for any 0–1 integer‐programming site search formulation. The constraints proposed herein address this problem, and we evaluate their efficacy and efficiency in the context of a regular and irregular tessellation of geographic space. An especially efficient constraint form is derived from a more general form and similarly evaluated. The results demonstrate that the proposed constraints represent a viable, general approach to the contiguity problem.     

Multi‐Type,Multi‐Zone Facility Location

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.     

Multi‐Domain User‐Generated Content Based Model to Enrich Road Network Data for Multi‐Criteria Route Planning

By utilizing today's web‐based technologies, people can act as sensors and share their perceptions, emotions and observations in a variety of data forms, such as images, videos, texts, Global Positioning System (GPS) trajectories and maps. These forms are collectively called user‐generated content (UGC). These data are in different domains and have a multi‐modality nature. Although recent efforts have probed the acquisition of local knowledge by using single‐domain UGC data in specific applications, such efforts have not thus far presented a model considering multi‐domain UGC specifically to enrich road network data. This article aims at presenting such a model wherein, with the help of each data domain of UGC, one aspect of people knowledge about the road segment is obtained. These different aspects of knowledge are integrated using a Skyline operator to support multi‐criteria route finding. We name this model ERSBU (enriching road segments based on UGC). In ERSBU, road segments are basic spatial units, and their subjective properties have been extracted by using available UGC. The scenic score for each road segment was computed by using geo‐tagged Panoramio photos. The accessibility level of each road segment to different facilities was calculated based on data captured from Wikimapia and OpenStreetMap. Moreover, for measuring the movement popularity of each road segment, Wikiloc and Everytrail GPS trajectories were utilized. For the implementation of the ERSBU model, Tehran region 6 was considered the case study area. The Evaluation of the results proved that road segments that achieved a high score based on knowledge extracted from UGC also mostly gained top scores by analyzing traditional maps. ERSBU allows users to accomplish more‐qualitative path finding by considering the multi‐view characteristics of road segments.     

Values in a vacuum? Towards an integrated multi‐level analysis of the governance of European space

This article calls for a new analytical approach to address how the emergence of a new European spatial policy field conditions policy‐making and implementation across Europe. This is now urgent because as the new policy field takes shape, its core ideas and values are being contested across different scales, sectors and territories of governance, creating new debates and arenas where understandings of space, place and connectivity, and relations between environment, society and economy, are being recast in a European light. In the full flow of generating a new policy field, we still seem to know little about what is being put at stake, or specifically how this is occurring. A value‐driven critical response from the research community is therefore needed, informed by research activity reaching across many dimensions of governance and policy‐making. The point of developing such an approach is not to discount previous research, but to explore how to generate synthetic and critical insights from different disciplinary and conceptual approaches within an integrated analytical framework. After this discussion, we conclude by proposing that IMAGES (Integrated Multi‐level Analysis of the Governance of European Space) can provide such a framework for analysing the emerging policy field of European spatial polices by constructing narratives of how spatial policy ideas and concepts turn into programming space, and how different territories interrelate with these policy concepts, and at the same time contribute to shaping them. This viewpoint and framework are predicated on the authors' belief that values behind the concepts remain hidden at present, both in policy processes and related research. Spatial policies seem to happen in a vacuum of values. By putting spatial justice as a value into this vacuum and by exploring the multi‐level governance of European space within an integrative analytical framework, the further development and application of the IMAGES framework can fulfil the need to contest the idea of objective policy‐making and analysis in European spatial policy.     

A cooperative spatial future for RheinRuhr

As is the case with other metropolitan regions, there are claims that the emerging functional urban region of RheinRuhr needs to develop a cooperative spatial future. This article explores the underlying difficulties in seeking to move forward in regional cooperation and strategic regional development for RheinRuhr. At present, no clear shift can be observed from traditional land use planning and local development approaches towards more strategic planning for the whole urban region. There are still many obstacles to be overcome. Nevertheless, strides have been taken in the direction of improved cooperation. A dense and functionally overlapping (sub)‐regional associationalism seems to be one step towards future city‐regional governance and possibly government. An evaluation is reported of two new innovative modes of structural and regional policies, namely the Regional Conferences and the IBA Emscher Park Planning Company; their impacts on regional policy‐making structures are reviewed. A discussion on more recent approaches to regional cooperation follows. It is argued that, in the long term, as a multi‐regionalized space, RheinRuhr requires some kind of coordinator and moderator and new practices of regional planning and management. The future development of a RheinRuhr metropolitan region requires further steps to be taken towards strategic planning by the Land government as well as a deepening of the level of institutionalization. Some ideas are put forward on how the elaboration of a spatial Leitbild for RheinRuhr could be initiated and supported.     

Claiming the nation for the people: the dynamics of representation in German public discourse about immigrant integration

Against the backdrop of the current trend to criticise elite‐centred approaches to the study of nationalism, this article sheds light on ways in which elite and popular notions of nationhood are mediated. Thus, public discourse on national identity is explored as a discourse that ordinary people can influence and in which elites make claims to represent the people. To illustrate the dynamics of representative claim‐making and reception, the article uses a case study from German public discourse; the debate about Thilo Sarrazin's 2010 book Germany Does Away With Itself. It finds that, although Sarrazin clearly breaches well‐established rules in national identity discourse, his ideas gain traction from the moment he becomes accepted as representing ordinary Germans. The findings are discussed against the backdrop of the history of German national identity discourse and anti‐essentialist approaches treating nationhood as a political claim.     

Nested or exclusive? The role of identities on blame attribution during the Great Recession

Despite an increasing number of studies assessing the importance of institutions as regards to accountability, it still remains to be known whether and how an individual's national and regional identity shapes the attribution of responsibilities in multi‐level settings. By focusing on the economic crisis that affected Europe since 2008, we argue that identity‐based assessments of responsibility for the crisis will occur solely among individuals who hold exclusively national or regional identities and who live in regions that have nationalist aspirations. This will be in contrast to individuals that have exclusively identities who live in regions that lack nationalist aspirations, as well as dual‐identity individuals, irrespective of where they live. We test our arguments by using data from Catalonia and Madrid (Spain) and Bavaria and Lower Saxony (Germany). In line with our expectations, our results show that, in minority nationalist regions such as Catalonia, an individual's identity will crucially determine which level of government is blamed for the economic crisis, while this will not occur in regions with no nationalist aspirations. The article reveals the existence of an additional determinant of blame attribution in some specific multi‐level arrangements and contributes to the understanding of the tensions between identity politics and blame avoidance.     

Not Learning from the Past: Adaptive Governance Challenges for Australian Natural Resource Management

Australia's governance arrangements for natural resource management (NRM) have evolved considerably over the last 30 years. The impact of changes in governance on NRM planning and delivery requires assessment. We undertake a multi‐method programme evaluation using adaptive governance principles as an analytical frame and apply this to Queensland to assess the impacts of governance change on NRM planning and governance outcomes. Data to inform our analysis includes: (1) a systematic review of 16 audits/evaluations of Australian NRM over a 15‐year period; (2) a review of Queensland's first‐generation NRM plans; and (3) outputs from a Queensland workshop on NRM planning. NRM has progressed from a bottom‐up grassroots movement into a collaborative regional NRM model that has been centralised by the Australian government. We found that while some adaptive governance challenges have been addressed, others remained unresolved. Results show that collaboration and elements of multi‐level governance under the regional model were positive moves, but also that NRM arrangements contained structural deficiencies across multiple governance levels in relation to public involvement in decision‐making and knowledge production for problem responsiveness. These problems for adaptive governance have been exacerbated since 2008. We conclude that the adaptive governance framework for NRM needs urgent attention so that important environmental management problems can be addressed.     

The Influence of Data Aggregation on the Stability of p-Median Location Model Solutions

Location planning often makes use of data in an aggregate form without a clear understanding of the consequences. Although research has been directed toward addressing aggregate data usage in location planning, there have been conflicting findings on the stability of location model solutions obtained using aggregated data. This paper analyzes the question of location model solution stability from a somewhat different perspective than previous researchers in that locational configurations identified for aggregate data are evaluated using the original disaggregate data. Analytical results demonstrate that a high level of solution stability does exist when aggregated data are utilized. Further, this analysis is based upon the use of what can be expected to be worst case aggregation approaches. This suggests that the use of aggregate data is adequate for conducting locational studies.     

HOW WE LIVE WITH THE PAST NOW

Michael Roth's new collection of essays, written over the last two decades, is held together by its author's pervasive concern with human temporality: our individual and collective passages through time, recorded by the faculty of memory, which pose some of our most intractable problems. The essays treat, and indeed provide a map to, several adjacent areas of inquiry: the history of the psychopathology of memory in the long nineteenth century; the vicissitudes of the trauma‐concept from its relatively modest medical origins to its postmodern apotheosis; and photography as a medium and art form embroiled in our relationship with the past. Roth's major interventions are threefold. First, while persuaded of the value of the psychoanalytic version of the trauma‐concept, he critiques the so‐called traumatophilia of postmodern theorists who, usually with reference to the Holocaust, seek to invest trauma with ethical valences and powers of legitimation or even, as in the case of Agamben, raise it to ontological status. Second, through his fine‐grained account of Freud's convergence with and divergence from his French colleagues, especially Charcot and Janet, Roth argues that the stunning breakthrough of psychoanalysis was to take the past seriously, to recognize the inevitable penetration of the past into the present in the human psyche as well our affective investment in and need to narrativize the past. For Roth, Freud's continued relevance today resides in what he has taught us about living with the past. Finally, Roth begins to develop the concept of “piety” as an attitude toward the past that fuels the writing of history. He leaves the concept in rudimentary form, but his evocative remarks suggest the fruitfulness of developing it further.     

大遗址考古发掘与保护的敏感问题

大遗址作为我国文化遗产的重要组成部分,其保护工作已经纳入国家文物保护的重点工作。随着国民经济和城市化进程的飞速发展,大遗址受到了巨大冲击。要保护好大遗址,必须首先确立抢救第一的思想,在考古发掘过程中依靠多学科专家的有效合作;还要认真执行国家有关法令,坚持遗址与周边环境的协调发展,确立可持续的科学保护方式。     

The Copper CHARM Set: A New Set of Certified Reference Materials for the Standardization of Quantitative X‐Ray Fluorescence Analysis of Heritage Copper Alloys*

This paper introduces a new set of certified reference materials designed to aid scientists and conservators working in cultural heritage fields with quantitative X‐ray fluorescence analysis of historical and prehistoric copper alloys. This set has been designated as the Copper CHARM Set (Cultural Heritage Alloy Reference Material Set). The Copper CHARM Set is designed to be used by a wide range of museum‐, art‐ and archaeology‐oriented scientists and conservators to help improve the accuracy and range of their calibrations for quantitative ED–XRF spectrometry of copper alloys, and also increase the number of elements that can routinely be quantified. In addition, the common use of a single core set of the reference materials is designed to significantly improve inter‐laboratory reproducibility, allowing greater data sharing between researchers and thus furthering possibilities for collaborative study.