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2011 15th Panhellenic Conference on Informatics

Sept. 30 2011-Oct. 2 2011

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  • [Front cover]

    Publication Year: 2011, Page(s): C1
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  • [Title page i]

    Publication Year: 2011, Page(s): i
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  • [Title page iii]

    Publication Year: 2011, Page(s): iii
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  • [Copyright notice]

    Publication Year: 2011, Page(s): iv
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  • Table of contents

    Publication Year: 2011, Page(s):v - xi
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  • Message from General Co-chairs

    Publication Year: 2011, Page(s): xii
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  • Message from Program Co-chairs

    Publication Year: 2011, Page(s): xiii
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  • Organizing Committee

    Publication Year: 2011, Page(s): xiv
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  • Program Committee

    Publication Year: 2011, Page(s):xv - xvi
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  • Local Organizing Committee

    Publication Year: 2011, Page(s): xvii
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  • Keynote Speakers

    Publication Year: 2011, Page(s):xviii - xix
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  • Towards an Integrated Teaching Environment for Parallel Programming

    Publication Year: 2011, Page(s):3 - 7
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB) | HTML iconHTML

    In this paper we present the integration of state of the art, open source, production level tools into a parallel programming environment, used for teaching parallel programming in MPI and OpenMP. Based on experiences introduced during this case study, and opinions gathered by an online questionnaire, a refined set of missing features that would strengthen the environment's educational role is def... View full abstract»

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  • Teaching Software Project Management through Management Antipatterns

    Publication Year: 2011, Page(s):8 - 12
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (342 KB) | HTML iconHTML

    Technological development and social progress are bound to affect fundamentally the business environments and therefore the people who work in them. The new conditions create unexpected difficulties and expectations that often limit the performance of the employees and consequently of the software projects, which often fail to meet their goals. The integrated education of future administrators - m... View full abstract»

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  • MentorChat: Introducing a Configurable Conversational Agent as a Tool for Adaptive Online Collaboration Support

    Publication Year: 2011, Page(s):13 - 17
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB) | HTML iconHTML

    Research in the field of computer-supported collaborative learning (CSCL) has systematically indicated that providing adaptive support to collaborating students is an efficient way of improving the outcomes of the collaborative learning activity. In this paper we introduce MentorChat, a web-based system that supports collaborative learning by utilizing a Conversational Agent. This agent, which can... View full abstract»

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  • Using an Automated Speech Emotion Recognition Technique to Explore the Impact of Bullying on Pupils Social Life

    Publication Year: 2011, Page(s):18 - 22
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (167 KB) | HTML iconHTML

    Most of the pupils are witness bullying behavior at school. The variety of the roles that bystanders play in school bullying should be seen as a chance of promoting anti-bullying strategies and interventions. The authors suggest the usage of an automated speech emotion recognition technique as part of a multiple methods tool-box of exploring bullying, so as, teachers to identify the nature of the ... View full abstract»

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  • Evaluation of Four, Free and Open Source DICOM Software Tools

    Publication Year: 2011, Page(s):23 - 27
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (623 KB) | HTML iconHTML

    Nowadays, there is a huge variety of Digital Imaging and Communications in Medicine (DICOM) software tools. Some of these tools can only display DICOM images and some other offer additional features, such as volume rendering and options for further digital processing and analysis. Other published research in the area offer a detailed description of the software functions but not an evaluation of t... View full abstract»

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  • Academic Research Policy-Making and Evaluation Using Graph Visualisation

    Publication Year: 2011, Page(s):28 - 32
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (283 KB) | HTML iconHTML

    Higher education institutions need to have a social responsibility and attainable objectives regarding their education and research activities. In our approach we use multi-indicator analysis in order to evaluate the research activities of an institution as well the degree of achievement for a specified research policy. Our work is a part of prototype system that supports academic evaluation and d... View full abstract»

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  • ProMaSI - A Project Management Simulator

    Publication Year: 2011, Page(s):33 - 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (231 KB) | HTML iconHTML

    This paper presents work-in-progress on a software project management simulator suitable for educating and training prospective software project managers. The work presents the design of a modular architecture for the simulator as well as a modeling language for representing possible management scenarios. It finally reports on issues one has to bear in mind when considering the development of such... View full abstract»

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  • The Effects of Dimensionality Curse in High Dimensional kNN Search

    Publication Year: 2011, Page(s):41 - 45
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (199 KB) | HTML iconHTML

    The dimensionality curse phenomenon states that in high dimensional spaces distances between nearest and farthest points from query points become almost equal. Therefore, nearest neighbor calculations cannot discriminate candidate points. Many indexing methods that try to cope with the dimensionality curse in high dimensional spaces have been proposed, but, usually these methods end up behaving li... View full abstract»

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  • Data Node Splitting Policies for Improved Range Query Efficiency in k-dimensional Point Data Indexes

    Publication Year: 2011, Page(s):46 - 50
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (257 KB) | HTML iconHTML

    High dimensional vectors (points) are very common in image and video classification, time series data mining, and many modern data mining applications. One of the most popular classification methods on such data is k-Nearest Neighbor (kNN) searching. Unfortunately, all proposed and state-of-the-art multi-attribute indexes fall short in terms of usability as dimensionality increases. This is attrib... View full abstract»

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  • Nearest Neighbor Algorithms Using xBR-Trees

    Publication Year: 2011, Page(s):51 - 55
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    One of the common queries in spatial databases is the (K) Nearest Neighbor Query that discovers the (K) closest objects to a query object. Processing of spatial queries, in most cases, is accomplished by indexing spatial data by an access method. In this paper, we present algorithms for Nearest Neighbor Queries using a disk based structure that belongs to the Quad tree family, the xBR-tree, that c... View full abstract»

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  • Incremental Discovery of Top-k Correlative Subgraphs

    Publication Year: 2011, Page(s):56 - 60
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (202 KB) | HTML iconHTML

    Although data mining is a research area with important contributions, there is relatively limited work on correlation mining from graph databases. In this paper, we formulate the problem of mining the next most correlated graph in a graph database given the top-k correlated graphs, with respect to a query graph q. In order to solve the above problem, we take advantage of the search tree, produced ... View full abstract»

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  • Virtual Learning Environments - An Overview

    Publication Year: 2011, Page(s):63 - 67
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (183 KB) | HTML iconHTML

    This paper presents an overview of existing virtual learning environments and recent research efforts towards the design of adaptive learning environments. Nowadays, the educational technology offers a considerable number of virtual learning environments to facilitate the learning process, thus supporting web-based education and e-learning to a large extend. E-learning systems work in a synchronou... View full abstract»

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  • A Hacker's Perspective on Educating Future Security Experts

    Publication Year: 2011, Page(s):68 - 72
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB) | HTML iconHTML

    Information Systems Security experts should be able to confront new, unknown threats. Therefore, "out-of-the-box" thinking is a necessary skill which can not be taught using traditional educational methodologies. In order to introduce our students into the mentality of modern adversaries and cyber criminals we designed a course based on the well-established theoretical frameworks of Information Sy... View full abstract»

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  • Pilot Introduction of IWB and COWs in Greek Schools

    Publication Year: 2011, Page(s):73 - 77
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (161 KB) | HTML iconHTML

    This article focuses on the implementation of two pilot project for the introduction of ICT in Greek schools. These projects (introduction of IWB and COWs) are supposed to be the first steps of the implementation of "digital school" which is the government's strategy for ICT adoption in education. In the following, the key findings of the two projects are identified and improvements upon the selec... View full abstract»

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