We examine (D − 2)-brane solutions in supergravities, showing that they fall into four categories depending on the details of the dilaton coupling. In general they describe domain walls, although in one of the four categories the metric describes anti-de Sitter spacetime. We study this case, and its S 1 dimensional reduction to a more conventional domain wall in detail, focussing in particular ...

The presence of infinite dimensional chiral symmetries is central to the study of two dimensional conformal field theories. These symmetries, called chiral algebras, are formed by the purely holomorphic and purely anti-holomorphic fields, respectively. How the field content of a conformal field theory (CFT) is organised into representations of the chiral algebras is encoded in the fusion ring. ...

THEORIES IN AI FALL INTO TWO broad categories: mechanism theories and content theories. Ontologies are content theories about the sorts of objects, properties of objects, and relations between objects that are possible in a specified domain of knowledge. They provide potential terms for describing our knowledge about the domain. In this article, we survey the recent development of the field of ...

Organizations frequently consider offshore systems development in the belief that projects can be completed for lower cost. While prices quoted by offshore vendors are often very appealing when compared with domestic vendors, there are additional risks that must be considered when looking to offshore systems development. These risks typically take the form of intangible and indirect project cos...

Disease prevention strategies fall into two broad categories. These are reactive and proactive strategies. There are various tools available for these and various management philosophies incorporate some or all of them. The most common tools for reactive management of diseases are antibiotics. In the US there are very few antibiotics that are specifically approved for use in aquaculture, though...

Abstract This paper reports on a design science research (DSR) study that develops principles for “green” – more environmentally sustainable data mining processes. Grounded in the Cross Industry Standard Process Data Mining (CRISP-DM) and review of relevant literature methods, Green IT, IS, identifies eight fall into three categories reuse, reduce, support. The an evaluation strategy provides e...

We show that the stable module categories of certain selfinjective algebras of finite representation type having tree class A n are actually u-cluster categories. Since their introduction in [6], [7], cluster categories have become a central topic in representation theory. They provide the framework for the representation-theoretic approach to the highly successful theory of cluster algebras, a...