Bulgarian OpenAIRE Repository
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120 research outputs found
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An Analyst’s Geospatial and Ontological Assistant
No full textWe discuss an Intelligence Analyst’s Geospatial and Ontological Assistant (IAGOA) under development that associates an intelligence analyst’s understanding of an agent’s activities with the geospatial features of the area of operation where they take place. Activities are identified with frames for the corresponding verbs from the FrameNet lexical database. A modeler, using the FrameNet OWL distribution, produces software used by the analyst to update a KML file with annotations identifying instantiations of the frames elements of the relevant frames. The Google Earth API is used for rendering KML files and scripting. The agent is tracked and the analyst’s conjecture of its activity is simulated; the analyst can redo her conjecture if need be. IAGOA’s FrameNet-based approach instantiates concepts inherent in language, making explicit the activities and the constellation of role-fillers involved in these activities
Theoretical Framework of Open Virtual Worlds for Professional Development
No full textThis paper discusses an attempt for formalization of the decision making process, evaluation and scaling of the components and parameters of Lifelong learning systems and services. Fuzzy logic techniques are used for the formal method representation. The parameterization and rules generation are based on preliminary research of the golden standards and surveys among the users and professionals in the field. The especially designed and implemented system is used for experiments
Cost Dependent QoS-based Discovery of Web Services
No full textThe role of the web services for development of distributed applications steadily increases over time. However, the rising number of available web services with the same functionality embarrasses clients during selection of such a one that fits best their requirements. To solve this problem, web service selection process needs to concern not only functional but also nonfunctional (QoS) properties of web services. The clients need to know the quality of the offered web services as well as what will be the price that they should pay for that quality. This paper contributes to this challenge by presenting an algorithm that allows clients to select the web service with an optimal correlation between quality and price
Fast Information Retrieval in the Open Grid Service Architecture
No full textInformation retrieval offers resource discovery mechanisms for unstructured information and has thus been identified as a standardization goal by the open grid forum. We argue that an integration of information retrieval into the infrastructure is not only an interesting prospect for grid users, but is in fact necessary because the batch processing approach supported by the open grid service architecture is at odds with the requirements of online query processing. The cost of staging the search indices to an allocated compute node to answer sporadic but frequent search queries is prohibitive. We advocate the use of web services as a cross site messaging mechanism and discuss the alternatives. To investigate, we have designed and built a prototype system for grid image retrieval. Unfortunately, the statelessness and isolation of web services proved problematic for our purposes, but we present a software architecture that can efficiently overcome these issues
Electronic Dictionary Notebook - Enhancing the Language Learning Process
No full textUpon its entry to the European Union, Bulgaria was presented with the challenge of intensive interaction with foreigners, so, speaking fluently several languages became a must. This paper presents a software application aiming to improve the process of language learning. The proposed solution, specializing in vocabulary augmentation, supports entry of word meanings, image suggestions, conjugation, examinations and statistics, searching and filtering. Each feature is carefully selected to target a particular need while studying within a language course or on one’s own. This paper also demonstrates how freely available resources on the Internet and a little programming effort can be combined to produce a useful tool for daily use
Ontology Mapping Tools, Methods and Approaches – Analytical Survey
No full textIn this paper we present the results of browsing, analyzing and comparing many ontology mapping tools, approaches and methods. We extract and classify valuable parameters for strict and unambiguous tool or method description. Every mapping tool, algorithm or approach must have such a description, practically usable for both human and software agents and sufficient for easy checking if it suitable or not for a given task. We will use our classifications for developing ontology, conceptualizing all valuable metadata for semantic machine-processable mapping tools description
The Design of a Pilot Interactive Multimedia Learning System, Its Implementation and Its Evaluation through a Social Network
No full textThis study deals with the design and application of an interactive multimedia learning system catered according to students learning needs. It has been created for the Information and Communication Technologies subject in the department of Food Technology of Alexander Technological Educational Institute of Thessaloniki. A learning system can be a very effective one if it is catered according to the students needs. An important aspect that has been overlooked so far, and should be included in such software applications, is their queries and comments during its use by them. This process assists to the improvement of the educational software and to the students learning process too. During the application of this educational software the students were setting their queries and comments on a Social network and according to them the required modification performed on time and according to their needs
Partitioning Simulation Objects in Distributed Environment
No full textThe parallel discrete event simulation (PDES) is a main approach to improve the execution of a simulation by distributing it between multiple processors. The mapping of the simulation entities over the processors is very important for the performance of the overall process of simulation. This paper presents an approach for mapping the simulation objects over distributed environment based on dynamically intelligent prediction algorithm for building their graph of interactions
Research Phases of University Data Mining Project Development
No full textEducational Data Mining becomes one of the challenging new research fields where data mining methods and tools could help universities in taking timely and data analysis based management decisions, thus contributing to gaining competitive advantages in their successful policy introduction. This paper presents the research activities performed for the implementation of a data mining project initiated in one of the most prestigious Bulgarian universities. The project main goal is to reveal the high potential of data mining applications for university management, referring to the optimal usage of data mining methods and techniques to deeply analyze the collected historical data. That will lead to better understanding the student behavior and building well structured educational process that meets the university policy and supports the management decision making process
Color Correction Acceleration Using a Color Cube and OpenCL
No full textThe article deals with the problem of real time color correction on modern but not dedicated video hardware, suggesting a new implementation of fast algorithm for color transformation utilizing 3D look-up tables. We focus on highly parallel nature of the proposed method and employ the GPU to perform the color calculations side-by-side. The paper is comparing the performance of the implementation of the algorithm on the CPU and on the GPU