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In this paper, we develop and evaluate a hybrid classification method based on a combination of Artificial Immune Systems and Genetic Algorithms. Specifically, the new algorithm, called Genetic-AIRS, is a combination of the Artificial Immune Resource System (AIRS) algorithm with well-known evolutionary computation techniques. As a result, Genetic-AIRS is executed globally, in contrast with AIRS which...
The problem of text-readability has received great attention in the literature. However, the classification of a text as readable is based solely in its linguistic complexity and does not take into account the skills of the intended reader. In this paper, we make a first attempt to study user-specific text readability. We focus on readers with dyslexia and documents written in English and Greek. Central...
Classification of items (i.e. students, genes, etc.) on data sources provided by various software systems represents an important task that needs to be performed for many reasons related to the business goals of the system. This paper presents several approaches that need to be taken into consideration by a data analysis system designer who aims to obtain an advanced classifier that implements several...
This paper proposes a spatial filter based on the cross-spectral density between directional microphones. The operation principle of the proposed spatial filter is predicated on the principles of the cross pattern coherence, which is a parametric spatial filtering technique that uses coherence-based measures as a criterion for focusing on specific directions. In this work, the choice of the directional...
In this paper, we propose transit journaling, a crowdsourcing solution for public transit data collection, and we describe CommYouTer, an Android app for this purpose. CommYouTer enables the user to (1) document his public transit trips with automated transfer detection, (2) participate in crowdsourcing real-time traffic conditions and other relevant data, and (3) query for efficient commuting directions...
Digital Cultural Heritage Map is a dynamic, webbased application that combines web-mapping, digital archives and multimedia. User-generated content can be manipulated from a back-end CMS. Application's goal is to gather spatial cultural data of a geographic area. This paper presents the designing and implementation process of the application. We present the philosophy and the guidelines that influenced...
The MusiNet research project aims to provide a comprehensive architecture and a prototype implementation of a complete Networked Music Performance (NMP) system. In this paper we describe the current status of the project, focusing on critical decisions regarding the system's architecture and specifications, the low delay audio and video coding techniques to be employed, the media relay design, and...
The implementation of a virtual environment is challenging when the area to be covered is of large scale with existing objects such as historical buildings, castles, city neighbors, traditional villages etc. The desire for high fidelity is compromised by the computer machine limitations thus imposing a certain trade-off between fidelity and performance being thoroughly investigated in this work. In...
Lung cancer is one of the most fatal types of cancer around the world. The World Cancer Research Fund International estimated that in 2012, 1.8 million new cases of this disease were diagnosed. Early diagnosis and classification of this condition prompts medical professionals on safer and more effective treatment of the patient. Availability of microarray technology has paved the way to exploring...
For several decades scholars from different disciplines explore knowledge management using different theoretical and engineering lenses. This paper focuses on a relatively recent approach to knowledge management and collaborative learning, namely Conversational Knowledge (CK) management. Using empirical data from two different case studies, we identify conversational patterns and assess intrinsic...
The present work concentrates on collaborative virtual work and the tactics for spanning organizational boundaries. To this effect, it proposes an architectural pattern for Collective Collaborative Tagging (CCT) that integrates cloud-based resource sharing and enterprise portals. The current implementation exploits Dropbox for file sharing and the Liferay enterprise portal for managing meta-data and...
This paper describes the design and implementation of a toolkit for collaborative music making. The rationale for the toolkit stems from the commitment to considering music making as a representational practice that entails virtual work amongst distributed peers. Using a pictorial illustration of the toolkit, we discuss several application scenarios and highlight the innovative features of the approach...
In 3D contact representations, the vertices of a graph are represented by 3D polyhedra and the edges are realized by non-zero-area common boundaries between corresponding polyhedra. While contact representations with cuboids have been studied in the literature, we consider a novel generalization of the problem in which vertices are represented by axis-aligned polyhedra that are union of two cuboids...
This paper places itself in the realm of anticipatory systems and envisions monitoring and control methods being capable of making predictions over system critical parameters. Anticipatory systems allow intelligent control of complex systems by predicting their future state. In the current work, an intelligent model aimed at implementing anticipatory monitoring and control in energy industry is presented...
In this paper a new approach for electricity consumption scheduling for smart grids/cities in price-directed electricity markets is presented. The new approach, named virtual cost, integrates electricity price forecasting and load forecasting to obtain an optimal consumption pattern. The goal of virtual cost approach is to provide the springboard for automated consumption scheduling with minimum human...
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