Panagiotis Polydoros, Chrisa Tsinaraki, Stavros Christodoulakis
Laboratory of Distributed Multimedia Information Systems
Technical University of Crete (MUSIC/TUC)
University Campus, Kounoupidiana, Chania
Greece.
Email: {panpolyd, chrisa, stavros}@ced.tuc.gr

Abstract

We present here GraphOnto, a software component and an API that allow the definition and editing of both standard-based and domain OWL ontologies and their use in multimedia information system components. In our working environment an OWL Upper Ontology that captures the MPEG-7 MDS is utilized and OWL domain ontologies extend the upper ontology with domain knowledge. The ontologies imported in GraphOnto are parsed so that graphical ontology browsing and editing interfaces are automatically generated. The ontologies are used to guide the semantic multimedia annotation in a standardized manner. OWL Ontology mappings, expressed using OWL constructs, are supported and allow the definition of personalized ontologies. Personalization of the GraphOnto user interface on the application, task and user levels is provided. In addition, GraphOnto interoperates with an MPEG-7 Repository both for semantic entity reuse during multimedia content annotation and for semantic description storage. GraphOnto has been evaluated against Protégé and clearly outperforms it.

Anastasia Karanastasi, Alexandros Zotos, Stavros Christodoulakis
Laboratory of Distributed Multimedia Information Systems
Technical University of Crete (MUSIC/TUC)
University Campus, Kounoupidiana
Chania. Greece
Email: [allegra, azotos, stavros]@ced.tuc.gr
 

Abstract

We present a generalized architectural framework for constructing and using natural language interfaces for interactions with multimedia repositories. The system allows the users to specify natural language queries about the multimedia content with rich semantics. It uses an extensive set of methodologies and tools for linguistic processing, and utilizes the MPEG-7 and the domain ontologies to reduce the ambiguities in the natural language and to rank the results. We describe the implementation of this framework for supporting interactions with a multimedia repository, described with the MPEG-7 MDS (Multimedia Description Schemes) structures, that also uses User Profile information for better ranking of the result queries.

Peter L. Stanchev^1,2, David Green Jr.¹, Boyan Dimitrov¹
1Kettering University, Flint, MI 48504
USA
2IMI - BAS, Sofia, 1113, Bulgaria.
Email: {pstanche, dgreen, bdimitro}@kettering.edu

Abstract

In this paper we illustrate several aspects of art databases, such as: the spread of the multimedia art images; the main characteristics of art images; main art images search models; unique characteristics for art image retrieval; the importance of the sensory and semantic gaps. In addition, we present several interesting features of an art image database, such as: image indexing; feature extraction; analysis on various levels of precision; style classification. We stress color features and their base, painting analysis and painting styles. We study also which MPEG-7 descriptors are best for fine painting images retrieval. An experimental system is developed to see how these descriptors work on 900 art images from several remarkable art periods. On the base of our experiments some suggestions for improving the process of searching and analysis of fine art images are given.
 

X-Similarity: Computing Semantic Similarity between Concepts from Different Ontologies

Euripides G.M. Petrakis, Giannis Varelas
Angelos Hliaoutakis, Paraskevi Raftopoulou
Department of Electronic and Computer Engineering
Technical University of Crete (TUC)
Chania, Crete, GR-73100
Greece
Email: petrakis@intelligence.tuc.gr, varelas@softnet.tuc.gr,
Email: angelos@softnet.tuc.gr, paraskevi@intelligence.tuc.gr

Abstract

Semantic Similarity relates to computing the similarity between concepts (terms) which are not necessarily lexically similar. We investigate approaches for computing semantic similarity by mapping terms to an ontology and by examining their relationships in that ontology. More specifically, we investigate approaches to computing the semantic similarity between natural language terms (using WordNet as the underlying reference ontology) and between medical terms (using the MeSH ontology of medical and biomedical terms). The most popular semantic similarity methods are implemented and evaluated using WordNet and MeSH. The focus of this work is also on cross ontology methods which are capable of computing the semantic similarity between terms stemming from different ontologies (WordNet and MeSH in this work). This is a far more difficult problem (than the single ontology one referred to above) which has not been investigated adequately in the literature. X-Similarity, a novel cross-ontology similarity method is also a contribution of this work. All methods examined in this work are integrated into a semantic similarity system which is accessible on the Web.
 

Fathi Tenzakhti
Faculty of Applied Sciences, Sohar University
Sohar. Oman
Email: tenzakhti@yahoo.com   

Abstract

This paper considers the problem of placing a fixed number of proxies in the Web modelled as a tree network. The study assumes that each link in the network has a fixed capacity, and that the total load passing through a link cannot exceed this capacity. We are interested in finding a minimum cost replication set that optimises the cost of servicing access requests in a read-only environment taking into account the capacity constraints of the links.
 

Roland Kaschek, Alexei Tretiakov
Department of Information Systems
Massey University, Private Bag 11 222
Palmerston North. New Zealand
Email: {R.H.Kaschek, A.Tretiakov}@massey.ac.nz   

Abstract

In this paper we consider both the interface language and domain language of a software system. That system co-evolves with its user group, with its usage context, application domain, and usage conditions. We presuppose that the evolution of that system is triggered by and reflected in the use of those languages. Since human language use is essentially metaphorical we expect the metaphors employed by system users to evolve when the software system evolves. To assure maximum usability of that system we suggest using a signal interception and pattern substitution component for implementing a controlled change of the metaphors that are available in the mentioned languages. We show how our prototype of such a component can be used for implementing the evolution of the used metaphors. Our approach focuses on the maintainability of the metaphors rather than on a once-and-for-all method for optimally choosing them.

Optimization of Boolean Queries in Information Retrieval Systems Using Genetic Algorithms - Genetic Programming and Fuzzy Logic

Suhail S. J. Owais
Ajloun University College - ‘AL-Balaqa‘ University
Email: suhailowais@yahoo.com

Abstract

This paper considers the problem of placing a fixed number of proxies in the Web modelled as a tree network. The study assumes that each link in the network has a fixed capacity, and that the total load passing through a link cannot exceed this capacity. We are interested in finding a minimum cost replication set that optimises the cost of servicing access requests in a read-only environment taking into account the capacity constraints of the links.
 

How to enhance Competitive Advantage of Digital Content Industries? - A case study of Taiwan

Szu-Wei Yeh, Yih-Chearang Shiue, Der-Juinn Horng
Department of Business Administration
National Central University
Taiwan, ROC

Abstract

On account for the rising of XDSL construction in Taiwan recent years, hundred of thousands people have become interested in digital content. Digital content is a creative industry, accompanied with emergence of rapid changed technologies and innovative business models, the government all over the world would be devoted to promoting the competitive advantage in digital content industries. From perspective of “digital independence”, online game is regarded as the most cultural and innovative among them. While designing the online games architecture researchers provide due importance to technology. However, the present paper place emphasis on human element in architecture related to online games. The Taiwan experience is used to construct the online game architecture.

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