Numerical experiments of some Krylov subspace methods for black oil model

This paper discusses preconditioned Krylov subspace methods for solving large scale linear systems that originate from oil reservoir numerical simulations. Two types of preconditioners, one being based on an incomplete LU decomposition and the other being based on iterative algorithms, are used together in a combination strategy in order to achieve an adaptive and efficient preconditioner. Numerical tests show that different Krylov subspace methods combining with appropriate preconditioners are able to achieve optimal performance.

Tourism is it the ‘new’ driver for regeneration?

Article explores how tourism might be the key driver to urban regeneration in towns and cities as economic crisis deepens.

Sustainability and local tourism branding in England's South Downs

This paper reports on a stakeholder consultation exercise that examined the tourism industry's perception of developing a local tourism branding scheme within the South Downs' protected areas in south-east England. The research shows that such schemes could offer potential benefits that are recognisable by the tourism industry, while helping to meet the statutory aims of the protected area. The paper records the perceptions of small tourism businesses, their fears, awareness of tourism impacts, perceptions of sustainable tourism and of local branding, and key criteria connected to the future organisation of a local tourism branding scheme. The conclusion lists the recommendations for the implementation of a local branding scheme, including grassroots stakeholder consultation that encourages ownership and participation, institutional frameworks that support capacity-building and the importance of developing core values within a local brand.