Panagiotis B. Pintelas

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—We present a new curvilinear algorithmic model for training neural networks which is based on a modifications of the memoryless BFGS method that incorporates a curvilinear search. The proposed model exploits the nonconvexity of the error surface based on information provided by the eigensystem of memoryless BFGS matrices using a pair of directions; a(More)
Artificial intelligence has enabled the development of more sophisticated and more efficient student models which represent and detect a broader range of student behavior than was previously possible. In this work, we describe the implementation of a user-friendly software tool for predicting the students' performance in the course of " Mathematics " which(More)
i Abstract Concept, Resource, Order, Product (CROP) is a reference architecture for adaptive Learning Objects owned by Semantic Learning Services developed by the second author. According to CROP, composite Objects are essentially recursive, and adaptively is an emergent property of Learning Service communication and collaboration. CROP is formally(More)
Traditional educational and training practices and methods cannot deal effectively with complex training domains nor do they focus on the trainees' individual requirements. To overcome these problems computer programs have been used as the training medium; Virtual Training Environments (VTEs) constitute the latest generation of such programs and embody(More)
Microworlds are typical examples of digital open environments of learning, which give the pupils the possibility of exploration and active training. They are composed of a number of objects and relations as well as a number of operations that affect the objects, modifying their relations and creating new objects. They are open systems which the pupils can(More)
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