Adaptation, interaction and urgency:a complex evolutionary economic geography approach to leisure

Local and regional governments in western European peripheral areas aim to spur leisure-led regional development. We explore planning for leisure by applying an evolutionary economic geography (EEG) approach from a complexity perspective. We identify conditions which enable and constrain leisure development and its effects on the region as a whole. This means combining the local level of individual adaptations with the institutional setting and with the regional scale. We examine the Dutch province of Fryslan and explore by means of case study analysis how current leisure development processes can be explained in a complex evolutionary manner. We explore economic novelty as a result of individual adaptations; how such adaptations through interactions create emerging spatial patterns; how these spatial patterns form self-organizing new types of order; and the way this process is dependent on previous paths whilst also creating new pathways. Our findings show that although development is dependent on individual adaptations often stemming from a few actors, for such adaptations to have an effect on the region requires a connectivity between actors and a sense of urgency amongst those actors. Using a complex EEG approach allows us to explain leisure-led regional development as the product of these conditions. This can help planners deal with the complexity and unpredictability of this process, focusing not on a desired end goal as such, but on creating the conditions in which a more autonomous development can take place

Complexity theories and ethnographies in planning for leisure-led regional development

Leisure-led regional development refers to leisure as a mechanism to achieve broad societal goals within a region: economic revenue, employment and service levels but also cultural or conservationist ambitions. Engaging in such leisure-led regional development proves a complex matter. Based on ethnographies of leisure in the Dutch province of Fryslân conducted over a five-year period between 2013 and 2018, this paper argues that combining theoretical understanding of complexity theories with analyses based on both evolutionary and discursive approaches results in enhanced understanding of the interactions shaping uncertainty in leisure development. Results of field observations, interviews, participation and document analysis show that planning for leisure-led regional development should consider autonomous and evolutionary processes, whilst focusing on purposefully influencing the interactions and perspectives of actors in leisure. More precisely, this means shaping the narratives and practices in these institutions which make specific interactions more likely to develop. This can be undertaken by including in planning efforts the individual perspectives and emotions among actors in the regional leisure sector. To cope with uncertainty at the heart of leisure-led regional development, an adaptive strategy should be adopted, both in the planning efforts taken and in how such efforts are monitored and evaluated.</p

How Does the Choice of the Lower Boundary Conditions in Large-Eddy Simulations Affect the Development of Dispersive Fluxes Near the Surface?

Large-eddy simulations (LES) are an important tool for investigating the longstanding energy-balance-closure problem, as they provide continuous, spatially-distributed information about turbulent flow at a high temporal resolution. Former LES studies reproduced an energy-balance gap similar to the observations in the field typically amounting to 10–30% for heights on the order of 100 m in convective boundary layers even above homogeneous surfaces. The underestimation is caused by dispersive fluxes associated with large-scale turbulent organized structures that are not captured by single-tower measurements. However, the gap typically vanishes near the surface, i.e. at typical eddy-covariance measurement heights below 20 m, contrary to the findings from field measurements. In this study, we aim to find a LES set-up that can represent the correct magnitude of the energy-balance gap close to the surface. Therefore, we use a nested two-way coupled LES, with a fine grid that allows us to resolve fluxes and atmospheric structures at typical eddy-covariance measurement heights of 20 m. Under different stability regimes we compare three different options for lower boundary conditions featuring grassland and forest surfaces, i.e. (1) prescribed surface fluxes, (2) a land-surface model, and (3) a land-surface model in combination with a resolved canopy. We show that the use of prescribed surface fluxes and a land-surface model yields similar dispersive heat fluxes that are very small near the vegetation top for both grassland and forest surfaces. However, with the resolved forest canopy, dispersive heat fluxes are clearly larger, which we explain by a clear impact of the resolved canopy on the relationship between variance and flux–variance similarity functions

Superpotentials in IIA compactifications with general fluxes

We derive the effective N=1, D=4 supergravity for the seven main moduli of type IIA orientifolds with D6 branes, compactified on T^6/(Z_2xZ_2) in the presence of general fluxes. We illustrate and apply a general method that relates the N=1 effective Kahler potential and superpotential to a consistent truncation of gauged N=4 supergravity. We identify the correspondence between various admissible fluxes, N=4 gaugings and N=1 superpotential terms. We construct explicit examples with different features: in particular, new IIA no-scale models and a model which admits a supersymmetric AdS_4 vacuum with all seven main moduli stabilized.Comment: 29 pages, published versio