Several efforts are being made to have the traditional pedagogy enhanced, especially for education in university, where the pedagogical aspects have been neglected for a long time [Donnay, Romainville, 1996]. Whereas tutoring systems are one of the means offered to invent original ways of teaching, their introduction remains marginal. In order to better understand the reasons of this lack we ha...

Measurements of the directivity of musical instruments are presented in the context of a new directivity representation of sources for auralizations. Three instruments have been recorded over the whole compass simultaneously in both horizontal and vertical planes with a multimicrophone array. Results are analyzed focusing on the differences between the directivity of particular tones and the av...

Network security analysts are confronted with numerous ambiguities when interpreting alerts produced by security devices. Even with the increased accuracy of these tools, analysts still have to sort through a tremendous number of potential security events in order to maintain the desired level of assurance. This paper describes how passive network discovery and persistent monitoring can provide...

Case-Based Planning (CBP) is an effective technique for solving planning problems that has the potential to reduce the computational complexity of the generative planning approaches [8, 3]. However, the success of plan execution using CBP depends highly on the selection of a correct plan; especially when the case-base of plans is extensive. In this paper we introduce the concept of a situation ...

Nowadays, the Internet of Things gains more and more attention through cheap, highly interconnected hardware devices that are attached with sensors and actuators. This results in an instrumented environment that provides sufficient context information to drive what is called situation recognition. Situations are derived from large amounts of context data, which is difficult to handle. In this a...

Today’s hardware and software infrastructure enables large-scale visualization of (near) real-time data in a geospatial context, which is attractive in a variety of application areas ranging from military applications to disaster management and incident response. The drawback on the other hand is that combined visualizations might lead to an overload of human processing capacity, for instance i...

Applying techniques from Machine Learning to real-world domains and problems often requires considerable processing of the input data, to both remove noise and to augment the amount and type of information present. We describe our work in the task of situation assessment in the domain of US Army training exercises involving hundreds of agents interacting in real-time over the course of several ...

I present a language for specifying planning problems in which there are external events, that is, events beyond the direct control of the planner which may happen while a plan is being executed. The language is based on Miller and Shanahan’s representation of narratives in the situation calculus. I describe an implemented planner that produces correct plans for this language, and discuss how s...

Projection in the situation calculus refers to answering queries about the future evolutions of the modeled domain, while progression refers to updating the logical representation of the initial state so that it reflects the changes due to an executed action. In the general case projection is not decidable and progression may require second-order logic. In this paper we focus on a recent result...

The prevalence of chronic Toxoplasma infections reported in the literature varies enormously. We hypothesize that one factor could be due to the different methods used in the evaluation of infections. Serological evidence of Toxoplasma infections in 450 pregnant women (PW) and 300 HIV-infected patients (HIV) were investigated by the Sabin-Feldman dye test and two other commercial ELISA kits (ki...