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Non-traditional design criteria such as flexibility, robustness, survivability and others (collectively referred to as the " ilities ") are increasingly recognized as critical system properties for the success of aerospace programs. While most decision makers would agree that the ilities are important system properties, they are neither well-defined nor(More)
In this article we present a prototypical implementation of a software tool for document retrieval which groups/arranges (pre-processed) documents based on a similarity measure. The prototype was developed based on self-organising maps to realise interactive associative search and visual exploration of document databases. This helps a user to navigate(More)
We present a Genetic Programming approach to evolve cooperative controllers for teams of UAVs. Our focus is a collaborative search mission in an uncertain and/or hostile environment. The controllers are decision trees constructed from a set of low-level functions. Evolved decision trees are robust to changes in initial mission parameters and approach the(More)
This paper shows that a version of the 2008) if the following assumptions are made: (i) All syntactic operations are driven by features of lexical items. (ii) These features are ordered on lexical items. (iii) All phrases are phases. (iv) Edge features that trigger intermediate movement steps can only be added before the phase head becomes inert. Given(More)
We present the design and development of a Hidden Markov Model for the division of news broadcasts into story segments. Model topology, and the textual features used, are discussed, together with the non-parametric estimation techniques that were employed for obtaining estimates for both transition and observation probabilities. Visualization methods(More)
Air operations mission planning is a complex task, growing ever more complex as the number, variety, and interactivity of air assets increases. Mission planners are responsible for generating as close to optimal taskings of air assets to missions under severe time constraints. This function can be aided by decision-support tools to help ease the search(More)
Genetic and molecular approaches have been critical for elucidating the mechanism of the mammalian circadian clock. Here, we demonstrate that the ClockΔ19 mutant behavioral phenotype is significantly modified by mouse strain genetic background. We map a suppressor of the ClockΔ19 mutation to a ∼900 kb interval on mouse chromosome 1 and identify the(More)
In this paper we argue that the concept of reprojection, often applied in the verbal domain, should be extended to the nominal domain. We develop an analysis according to which a moved N does not adjoin to a functional category; rather, it moves out of its projection and remerges with it. This movement is (indirectly) triggered by a certain kind of(More)