Towers of recollement and bases for diagram algebras: planar diagrams and a little beyond

The recollement approach to the representation theory of sequences of algebras is extended to pass basis information directly through the globalisation functor. The method is hence adapted to treat sequences that are not necessarily towers by inclusion, such as symplectic blob algebras (diagram algebra quotients of the type-\hati{C} Hecke algebras). By carefully reviewing the diagram algebra construction, we find a new set of functors interrelating module categories of ordinary blob algebras (diagram algebra quotients of the type-${B}$ Hecke algebras) at {\em different} values of the algebra parameters. We show that these functors generalise to determine the structure of symplectic blob algebras, and hence of certain two-boundary Temperley-Lieb algebras arising in Statistical Mechanics. We identify the diagram basis with a cellular basis for each symplectic blob algebra, and prove that these algebras are quasihereditary over a field for almost all parameter choices, and generically semisimple. (That is, we give bases for all cell and standard modules.)Comment: 61 page

The changing profile of Kansas trustees

Community colleges are vital part of higher educatio

Networks in the shadow of markets and hierarchies : calling the shots in the visual effects industry

The nature and organisation of creative industries and creative work has increasingly been at the centre of academic and policy debates in recent years. The differentiation of this field, economically and spatially, has been tied to more general arguments about the trend towards new trust-based, network forms of organization and economic coordination. In the first part of this paper, we set out, unpack and then critique the conceptual and empirical foundations of such claims. In the main section of the paper, we draw on research into a particular creative sector of the economy - the visual effects component of the film industry - a relatively new though increasingly important global production network. By focusing both on firms and their workers, and drawing on concepts derived from global value chain, labour process and institutional analysis, we aim to offer a more realistic and grounded analysis of creative work within creative industries. The analysis begins with an attempt to explain the power dynamics and patterns of competition and collaboration in inter-firm relations within the Hollywood studio-dominated value chain, before moving to a detailed examination of how the organisation of work and reemployment relations are central to the capturing of value. On the basis of that evidence, we conclude that trust-based networks and collaborative communities play some part in accessing and acquiring leverage in the value chain, but do not explain the core mechanisms of resource allocation, coordination and work organisation

Growing Old in America: Expectations vs. Reality

Presents survey results on indicators of old age, "felt age," and the upsides and downsides of growing older, by age, gender, income, and race/ethnicity. Highlights gaps between perceptions of younger adults and the self-reported experiences of seniors