Bulgarian OpenAIRE Repository
Not a member yet
120 research outputs found
Sort by
OpenAIREplus
No full textDirections the outcomes of the OpenAIRE project, which
implements the EC Open Access (OA) pilot. Capitalizing on the OpenAIRE
infrastructure, built for managing FP7 and ERC funded articles, and the
associated supporting mechanism of the European Helpdesk System,
OpenAIREplus will “develop an open access, participatory infrastructure for
scientific information”. It will significantly expand its base of harvested
publications to also include all OA publications indexed by the DRIVER
infrastructure (more than 270 validated institutional repositories) and any other
repository containing “peer-reviewed literature” that complies with certain
standards. It will also generically harvest and index the metadata of scientific
datasets in selected diverse OA thematic data repositories. It will support the
concept of linked publications by deploying novel services for “linking peer-reviewed literature and associated data sets and collections”, from link
discovery based on diverse forms of mining (textual, usage, etc.), to storage,
visual representation, and on-line exploration. It will offer both user-level
services to experts and “non-scientists” alike as well as programming interfaces
for “providers of value-added services” to build applications on its content.
Deposited articles and data will be openly accessible through an enhanced
version of the OpenAIRE portal, together with any available relevant
information on associated project funding and usage statistics. OpenAIREplus
will retain its European footprint, engaging people and scientific repositories in
almost all 27 EU member states and beyond. The technical work will be
complemented by a suite of studies and associated research efforts that will
partly proceed in collaboration with “different European initiatives” and
investigate issues of “intellectual property rights, efficient financing models,
and standards”
Teachers’ Training Design Model and Decision Support System
No full textThis paper discusses the problems in the design of teacher’s training as a form of professional development. The research is focused on the tool for appropriate support of courses design for the teachers to develop their knowledge, skills and competences in order to be able to apply in effective way digital technologies in their practice. The recent research shows that the constructivists approach is most suitable to be used in the teacher training. The complexity of instructional design for constructivist training leads the authors to the idea to create a model based on fuzzy logic and to build on its base an expert system to support decisions during the course design. The article presents a methodology used to extract knowledge from the experts and to identify the main components in the model, their characteristics and relations. Authors present developed model based on fuzzy logic as well as the prototype of the expert system Open Virtual World
Empirical Analysis of Software Reliability Models Predictive Ability
No full textEach software system needs an evaluation of its non-functional characteristics. Reliability is one such important non-functional characteristic and currently there exist a lot of models that asses it from different perspectives. In this paper we make an empirical comparison of several such models and analyze their ability to correctly estimate software reliability
Social Network Analysis In Professional е-Recruitment
No full textThe present paper considers the importance of social networks for the success of the recruitment process in the knowledge society. It provides a short theoretical background on social network analysis (SNA) and the most common recruitment practices. The paper provides some results from a survey on the social networks usage by Bulgarian recruiters. On bases of the analysis made, a short specification of a tool supporting professional recruitment is provided
The Influence of Global Constraints on DTW and LCS Similarity Measures for Time-Series Databases
No full textAnalysis of time series represents an important tool in many application areas. A vital component in many types of time-series analysis is the choice of an appropriate distance/similarity measure. Numerous measures have been proposed to date, with the most successful ones based on dynamic programming. Being of quadratic time complexity, however, global constraints are often employed to limit the search space in the matrix during the dynamic programming procedure, in order to speed up computation. In this paper, we investigate two representative time-series distance/similarity measures based on dynamic programming, Dynamic Time Warping (DTW) and Longest Common Subsequence (LCS), and the effects of global constraints on them. Through extensive experiments on a large number of time-series data sets, we demonstrate how global constrains can significantly reduce the computation time of DTW and LCS. We also show that, if the constraint parameter is tight enough (less than 10–15% of time-series length), the constrained measure becomes significantly different from its unconstrained counterpart, in the sense of producing qualitatively different 1-nearest neighbour graphs. This observation highlights the need for careful tuning of constraint parameters in order to achieve a good trade-off between speed and accuracy
Reason-able View of Linked Data for Cultural Heritage
No full textThis paper presents a novel approach that relies on the innovative idea of reason-able view of the Web of linked data applied to the domain of cultural heritage. We describe an application of data integration based on semantic web technologies and the methods necessary to create an integrated semantic knowledge base composed of real museum data that are interlinked with data from the Linked Open Data (LOD) cloud. Thus, creating an infrastructure to allow for easy extension of the domain specific data, and convenient querying of multiple datasets. Our approach is based on a model of schema level and an instance level alignment. The models use several ontologies, e.g. PROTON and CIDOC-CRM, showing their integration by using real data from the Gothenburg City Museum
An Analysis and Forecast of Software and Services Research in Bulgaria – Comparing the Situation Two Years Later
No full textIn [1], we had published the results of our analysis of software and services research in Bulgaria, encompassing the 2004-2008 time period. This analysis was part of the activities performed within the EU FP7 Sister project.By using the same methodology, expanded now with some new features, we started analyzing a new period – 2009-2010. In this paper we compare the results obtained for both periods (overcoming their different duration trough a simple data transformation). The first results obtained show an intensification of the research work in the majority of the subject areas in view with a few new appearing now. However, a finalization of the analysis is planned to be performed in the next few months
Using Robotics to Achieve Meaningfully Engaged Learning
No full textThere has been a significant decline in the number of college students choosing majors in computer science or technology related fields. Additionally, within the United States, there is an achievement gap between under-represented minority students and majority students at a time when underrepresented groups are becoming an increasing proportion of the national labor force. This reluctance to study Science, Technology, Engineering, and Mathematics (STEM) disciplines must be confronted and changed if the United States is to maintain a competitive position within the global market. Effective use of learning technologies is vital to solving many of our current STEM learning challenges. Robotics is a growing research area in computer science education. We use robotics as a technology tool to captivate and engage students in learning computer science concepts. Robotics engages multiple modes of learning, including: sensory, perceptual, and cognitive information processing
Multimedia Standards. History. State o f Art
No full textThe aim of this presentation is to review some of the standards, connected with multimedia and their metadata. We start with
MPEG family and continue with Open Standards for Interactive TV. Efficient video-streaming is presented. Some standards for audiovisual metadata are outline. We finish with W3C standards
Towards the Foundation of Read-Write Governance
No full textThe research presented in this paper aims towards defining a governmental platform that would satisfy the need for a flexible and participative infrastructure for governing a modern society based on the rule-of-law and existing democratic conventions. Rather than designing a brand new protocol for the citizen-to-government interaction, we make use of existing well-supported standards, namely SQL, XML, XAdES and HTTP to model a governmental platform that fully complies with legal requirements of modern governments and which allows both read and write access to governmental data based on complex rules applied at run-time