This paper draws on the notion of multilingualism as social practice (Heller 2007) to critique postcolonial language planning and policies in Africa. Drawing on illustrations from Ethnologue's (2009) languages of Africa, studies on language planning and policy in Africa, and recent developments in harmonisation of cross-border language research (Prah 1998; Banda 2008), the paper argues that the...

Despite major progress in AI planning over the last few years, many interesting domains remain challenging for current planners. Topological abstraction can reduce planning complexity in several domains, decomposing a problem into a two-level hierarchy. This paper presents LAP, a planning model based on topological abstraction. In formalizing LAP as a generic planning framework, the support of ...

Diagnosis of discrete event systems amounts to finding good explanations, in the form of system trajectories consistent with a given set of partially ordered observations. This problem is closely related to planning, and in fact can be recast as a classical planning problem. We formulate a PDDL encoding of this diagnosis problem, and use it to evaluate planners representing a variety of plannin...