Nikolaos M. Avouris

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Monitoring and analysis of activities of small groups of students collocated or at a distanceengaged in synchronous collaborative problem solving activity is the subject of this paper. This is discussed in the frame of Synergo, a new synchronous collaboration support environment that monitors the activity and permits visualization of various quantitative(More)
In this paper, we describe the experience of designing a collaborative learning activity for a traditional historical/cultural museum. The activity, based on a "Mystery in the Museum" story, involves collaboration of small groups of students through mobile handheld devices. An application has been built that permits authoring of such activities, while a(More)
Classification problems with uneven class distributions present several difficulties during the training as well as during the evaluation process of classifiers. A classification problem with such characteristics has resulted from a data-mining project where the objective was to predict customer insolvency. Using the dataset from the customer insolvency(More)
This paper includes a review of mobile applications used in museum environments, focusing on the notion of context and its constituent dimensions. Museums are a representative example in which the context influences interaction. During a museum visit, the visitors interact with the exhibits through mobile devices. We argue that, effective interaction design(More)
This paper describes the architecture of the ModelllingSpace open problem-solving environment. ModellingSpace is a new learning environment supporting synchronous and asynchronous collaborative problem solving by students at a distance. We describe here the key design decisions of the ModellingSpace software and in particular issues related with support for(More)
In this paper, a novel methodology for selecting appropriate color scheme for a web site is presented. The methodology uses a machine learning algorithm for generating a network that relates the color model of a web site with the emotional values that are attributed to it by its users. The approach involves an empirical study to collect data, used to train(More)
This paper focuses on usability evaluation of information and communication technologies applications in education (ICTE applications). Various classes of teaching and learning systems are discussed in terms of technologies used and pedagogical approaches. Their usability is analyzed according to various dimensions and the impact of system usability on the(More)
Computer-supported collaborative problem solving requires new methodological approaches of interaction and problem solving analysis. Usually analysis of collaborative problem solving situations is done through discourse analysis or interaction analysis, where in the center of attention are the actors involved (students, tutors etc.). An alternative(More)
The paper discusses the applicability of cooperating knowledge-based system (CKBS) techniques in environmental decision support. The reasons for using CKBSs are given first. Existing environmental CKBSs are discussed, with special emphasis on a typical example, the Distributed Chemical Emergencies Manager (DCHEM). The methodological framework applied to the(More)