SCTAG: A Mildly Context-Sensitive Formalism for Modeling Complex Intentions in Spatially Structured Environments

Parsing Tree Adjoining Grammars using Evolutionary Algorithms

We use evolutionary algorithms to speed up a rather complex process, the tree adjoining grammars parsing. This improvement is due due to a linear matching function which compares the fitness of different individuals. Internally, derived trees are processed as tree-to-string representations. Moreover, we present some practical results and a post running analysis that may encourage the use of evo...

Computational properties of Unification Grammars

There is currently considerable interest among computational linguists in grammatical formalisms with highly restricted generative power. This is based on the argument that a grammar formalism should not merely be viewed as a notation, but as part of the linguistic theory. It is now generally accepted that CFGs lack the generative power needed for this purpose. Unification grammars have the abi...

First Order Recurrent Neural Networks Learn To Predict A Mildly Context-Sensitive Language

Spatially Constrained Grammars for Mobile Intention Recognition

Mobile intention recognition is the problem of inferring a mobile agent’s intentions from her spatio-temporal behavior. The intentions an agent can have in a specific situation depend on the spatial context, and on the spatially contextualized behavior history. We introduce two spatially constrained grammars that allow for modeling of complex constraints between space and intentions, one based ...

A context-sensitive dynamic role-based access control model for pervasive computing environments

Resources and services are accessible in pervasive computing environments from anywhere and at any time. Also, due to ever-changing nature of such environments, the identity of users is unknown. However, users must be able to access the required resources based on their contexts. These and other similar complexities necessitate dynamic and context-aware access control models for such environmen...