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Dementia is an increasing problem in today's ageing society, and meeting future demand for care is a major concern for policy-makers and planners. This paper presents a novel hybrid simulation model that simultaneously takes population-level and patient-level perspectives to calculate the numbers of patients at different stages of disease severity over time, and their associated care costs. System Dynamics is used at population level to capture ageing, dementia onset, and all-cause mortality, whereas disease progression is modelled at individual patient level using Agent-Based methods. This enables the model to account for variability between patients in the rate of cognitive decline, dementia-related mortality and response to treatment interventions. Using epidemiological data from the medical literature, disease progression is modelled via a longitudinal clustering method to identify progression type, followed by mixed-effects regression to reflect each individual's rate of cognitive decline. Results are presented for population data from the south of England, and show that the currently available interventions have only modest effects at population level. [ABSTRACT FROM AUTHOR]

The following paper reiterates the importance of studying past visibility patterns within the context of landscape archaeology. In spite of the many difficulties and criticisms revolving around this topic, efforts aimed at reconstructing these patterns and exploring their possible roles are considered to be central to the reconstruction of social landscapes. This paper extends previous GIS work done on inter-visibility by making reference to the concept of "co-visibility," by exploring the way in which visibility of any monument or set of monuments is shared with that of other monuments. A subset of round barrows from the Yorkshire Wolds (northern England) is used to illustrate this work. The study also underlines the need to address the variability which is often present in archaeological data, variability, in this case, of visibility patterns associated with the barrows due to our lack of precise chronological information. [ABSTRACT FROM AUTHOR]

Implementation of IWRM has generally been approached mechanistically, with attention focused on identifying necessary conditions and developing useful tools and techniques. In contrast, this article examines alternative approaches to implementation in their totality, using IWRM in England as a case analysis. In England, the EU Water Framework Directive has been implemented through a ‘top-down’ approach but a ‘bottom-up’ approach has been adopted for catchment management. Both the Water Framework Directive and the catchment-based approach are consistent with the goals of IWRM, but their implementation arrangements are disconnected and operate at different scales. This example suggests that cross-scale interplay and bridging institutions are critical to the successful implementation of IWRM in complex governance settings. [ABSTRACT FROM AUTHOR]