Krassen Stefanov

Krassen Stefanov
Sofia University "St. Kliment Ohridski" · Department of Information Technologies

Professor

About

115
Publications
21,957
Reads
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385
Citations
Citations since 2016
35 Research Items
140 Citations
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Introduction
Krassen Stefanov currently works at the Department of Information Technologies, Sofia University "St. Kliment Ohridski". Their current project is 'RAGE project (http://rageproject.eu).'
Additional affiliations
July 1984 - present
Sofia University "St. Kliment Ohridski"
Position
  • Professor (Full)
Education
October 1977 - July 1982
Sofia University "St. Kliment Ohridski"
Field of study
  • Mathematics and Computr Science

Publications

Publications (115)
Article
Full-text available
The European Open Science Cloud and the strategy for unified digital market are corner stones in the way of Europe's economy, industry, and society to the new digital era. In this paper, we will analyze how digital libraries can be best utilized for knowledge access and sharing in the new digital market.
Article
There is a major shift today to incorporate competency-based education in all educational systems. This paradigm brings new requirements to software systems used in education. I present some efforts in this direction and show examples and case studies from research projects.
Chapter
Parallel application can be studied with the means of the supercomputer performance monitoring system. The monitoring system agent activates during the parallel program run to collect data from system sensors. It occupies program’s resources and causes perturbation in the monitored program workflow. The influence of the performance monitoring syste...
Chapter
Full-text available
The educational community is increasingly recognising the benefits of applying competence-based learning (CBL) in formal and informal training. Both learner-oriented and goals-oriented, competence-based learning encourages flexibility, adaptation and customisation of the learning process to specific learning context and individual preferences. At t...
Conference Paper
This paper proposes an application model of the "Flipped classroom" approach in the undergraduate course "Inclusive Education". The course is for students from the Bachelor's programme "Mathematics and Informatics" of the Faculty of Mathematics and Informatics at Sofia University, who are trained for teachers of mathematics, informatics and informa...
Article
In this paper we present the process of development of Bulgarian Open Science Digital Library (BOSDL) as the first and main ingredient of Bulgarian Open Science Cloud (BOSC). We introduce and discuss main principles involved in the Open Science movement. We also give a lot of technical details related to BOSDL development.
Article
The paper presents the current state of Building the Bulgarian Open Science Cloud (BOSC).
Conference Paper
This paper presents the RAGE marketplace portal (gamecomponents.eu), which is intended as a hot spot and neutral single point of access for serious game technologies. The portal aims at fostering collaborations and the exchange of technical artefacts and associated knowledge and resources between different stakeholders in the field of serious gamin...
Article
Full-text available
The digitization era for electric utilities is tightly coupled with the development of inter-disciplinary software (S/W) platforms aiming at establishing much more efficient communication pathways with their clientele and other smart grid market stakeholders. This paper presents the SOCIALENERGY S/W platform, which is funded by the EU H2020 work pr...
Chapter
Full-text available
In this paper the results from a study, performed in several European countries, are presented, aimed to identify the main challenges which teachers face when trying to implement innovative teaching methods, stressing on the situation in Bulgaria. The overall design of the study is presented and the used research method is described. The main resea...
Conference Paper
Full-text available
Technology transfer of gamification assets to non-leisure contexts such as the energy efficiency sector has become the "holy grail" of today's research and industrial efforts towards a more sustainable energy system. In the liberalized retail market context, electric utilities are gradually adopting new business models towards transitioning their c...
Conference Paper
Full-text available
In this paper we present a study, aimed to identify the main challenges teachers face when trying to implement innovative teaching methods, stressing on identifying the needed STEM teachers competence development. The overall design of the study follows the European Awareness Scenario Workshop methodology and aims to negotiate the teachers’ need, p...
Article
The European energy market liberalization strategy aims to assign a new role to consumers and end-users’ communities so that they can become active participants on the energy market. In this paper we present the project SOCIALENERGY, EU-funded under the H2020 program. This project aims to promote the EU energy market transformation policy and to de...
Article
Full-text available
The article precents a review of the normative framework in Bulgaria related to the development of STEM teachers’ competences. It studies explicitly defined requirements: pedagogical, academic, administrative and communicative competences, as well as implicitly defined ones, integrated in National Educational Standards and students’ curricula: rese...
Article
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Nowadays education is inconceivable without the use of e-environment and all the benefits it can ensure. Modern learning systems are featured with a wide range of resources for gathering relevant user traces for data analysis. The main goal of the research described in this paper is to explore how the learning analytics methods can be used to impro...
Article
Full-text available
This paper presents the architecture of the RAGE repository, which is a unique and dedicated infrastructure that provides access to a wide variety of advanced technology components for applied game development. The RAGE project, which is the principal Horizon2020 research and innovation project on applied gaming, develops up to three dozens of soft...
Conference Paper
Full-text available
This paper describes the structural architecture of the RAGE repository, which is a unique and dedicated infrastructure that provides access to a wide variety of advanced technologies (RAGE software assets) for applied game development. These software assets are reusable across a wide diversity of game engines, game platforms and programming langua...
Article
Video games proved to be an attractive media for presenting cultural heritage issues. They can use virtual worlds to present cultural and historic information in amazing and highly appealing way. Each video game is implemented using set of valuable artifacts (components) reflecting technological, socioeconomic and historical issues. These software...
Conference Paper
Software assets are key output of the RAGE project and they can be used by applied game developers to enhance the pedagogical and educational value of their games. These software assets cover a broad spectrum of functionalities – from player analytics including emotion detection to intelligent adaptation and social gamification. In order to facilit...
Article
Full-text available
This deliverable (D1.4) is an intermediate document, expressly included to inform the first project review about RAGE’s methodology of software asset creation and management. The final version of the methodology description (D1.1) will be delivered in Month 29. The document explains how the RAGE project defines, develops, distributes and maintains...
Conference Paper
Full-text available
Although many scholars recognise the great potential of games for teaching and learning, the EU-based industry for such “serious games” is highly fragmented and its growth figures remain well behind those of the leisure game market. Serious gaming has been designated as a priority area by the European Commission in its Horizon 2020 Framework Progra...
Conference Paper
The main research goals of this paper are to analyse the quality of the developed e-learning course prototypes by the students in the Masters programme “E-Learning” after applying an integrated approach to the final assignments that the students prepare for four of the important courses in the programme. In the third year of the application of this...
Conference Paper
Full-text available
Although many scholars recognise the great potential of games for teaching and learning, the EU-based industry for such “serious” games” is highly fragmented and its growth figures remain well behind those of the leisure game market. Serious gaming has been designated as a priority area by the European Commission in its Horizon 2020 Framework Progr...
Conference Paper
Full-text available
The paper investigates the quality of the Electronic Distance Learning (EDL) courses, developed for five faculty degree programmes prepared for accreditation for EDL mode of delivery by the Faculty of Mathematics and Informatics of Sofia University “St. Kliment Ohridski”. It analyses the results of provided consultations to academic staff on design...
Technical Report
Full-text available
This result booklet will take you on an almost 24-month journey through the project ITSM4SME. Firstly, you will get to know the background of the project, the project itself and the three regions. In the middle part you will learn more about the topic of IT Service Management and later on you will get an insight of all the details of the specific I...
Book
Full-text available
Small and medium-sized enterprises (SMEs) play a fundamental role in the economic system of the European Union: SMEs represent over 99 percent of all companies and provide two-thirds of the jobs in the private sector. Their innovativeness and economic success have significant influence on growth, jobs and prosperity in Europe. Information technolog...
Conference Paper
Full-text available
The paper presents an inquiry-based research approach designed and conducted in accordance with an educational model which uses weSPOT inquiry workflow engine, smartphones and tablets. Presented study shows how mobile technologies are able to support teaching and learning. It also discusses challenges from teacher's point of view for using mobile t...
Article
This paper presents an innovative approach for enhancing digital libraries functionalities. An innovative distributed architecture involving digital libraries for effective and efficient knowledge sharing was developed. In the frame of this architecture semantic services were implemented, offering multi language and multi culture support, adaptabil...
Article
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This paper discusses a pilot case held in First Private Mathematical School, Sofia, Bulgaria that explores the Inquiry Based Learning through a specially developed virtual classroom. The paper describes the motivation for using Inquiry Based Learning and how it will be gradually implemented through several pilot experiments. It reveals the design a...
Article
Full-text available
weSPOT is a new European initiative proposing a novel approach for personal and social inquiry-based learning in secondary and higher education. weSPOT aims at enabling students to create their mash-ups out of cloud-based tools and services in order to perform scientific investigations. Students will also be able to share their inquiry accomplishme...
Article
Full-text available
Math, science and technology (MST) education in Europe is significantly based on experiments and problem solving. The innovative project weSPOT aims at enhancing MST education by emphasizing scientific inquiry, individualization of learning and the role of social interaction. To achieve this goal, students are supported by a set of software tools,...
Book
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The present book contains the Proceedings of the UNESCO International Workshop QED: Re-Designing Institutional Policies and Practices, to Enhance the Quality of Education through Innovative Use of Digital Technologies, held in Sofia, Bulgaria on 14-16 June 2010. It is the forerunner of the UNESCO activities at the State University of Library Studie...
Conference Paper
Full-text available
Scientific inquiry is at the core of the curricula of schools and universities across Europe. weSPOT is a new European initiative proposing a cloud-based approach for personal and social inquiry. weSPOT aims at enabling students to create their mashups out of cloud-based tools in order to perform scientific investigations. Students will also be abl...
Article
This document builds on a number of previous deliverables, notably D2.2.1 (Initial Competence Service Library), D2.3 (Integrated OpenScout Taxonomy), and D2.1 (Analysis Report on Competence Services). It extends these previous reports by describing the design and development processes and implementation that led to the creation of new and improved...
Article
Full-text available
This paper presents the role of contemporary digital libraries with educational resources in Europe. The importance of enriching digital resources with complete, descriptive and accurate metadata is discussed as well as how these metadata are supported within an European project – Share.TEC. The paper presents the results of a workshop with members...
Conference Paper
Full-text available
The paper presents a research on use of digital technologies to support teachers and teacher educators. First, we discuss briefly recent studies, related to teacher educators, who show their confusion among the sea of learning resources, published in various specialized digital libraries or repositories. Next, the Share.TEC innovative portal for te...
Conference Paper
The paper presents a digital repository of metadata resources for teachers education, as well as a portal for the community of practices, build around the repository. Both the repository and the community are developed in the frame of the European project Share.TEC. Some approaches for endowing digital libraries with adaptability capabilities in or...
Chapter
Full-text available
Sophisticated Technology Enhanced Learning (TEL) instruments as training simulations and Serious Games (SG) do not provide knowledge content in an explicit form, but propose interactive solutions for learners to build their own skills and competences in close to real situations. Thus, expert knowledge should be implicitly embedded into design of SG...
Conference Paper
This paper discusses the role of the contemporary European digital libraries in teachers education. It presents a digital repository of metadata resources for teachers education, as well as a portal for the community of practices, build around the repository. Both the repository and the community are developed in the frame of the European project S...
Conference Paper
Full-text available
This paper presents the role of contemporary digital libraries with educational resources in Europe. The importance of enriching digital resources with complete, descriptive and accurate metadata is discussed as well as how these metadata are supported within an European project – Share.TEC. The paper presents the results of a workshop with members...
Article
Full-text available
The EC funded Share.TEC project aims to provide culturally aware access to resources across Europe related to Teacher Education. The semantic core of the system is the Teacher Education Ontology (TEO), which not only supports the multilingual interface but also underpins fundamental functionalities like searching and browsing. This paper describes...
Article
Full-text available
The article presents an example of how Information and Communication Technologies (ICT) can enhance the process of teacher training, and how this can be used for lifelong competence development for teachers. The paper describes the goals, settings, implementation and results of a pilot teachers' training realized within the frame of the European pr...
Conference Paper
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This paper deals with some approaches for providing adaptability for end users when working with digital libraries. The paper is focused on several techniques and methods for achieving adaptability in general, and provides specific examples and guidelines for their implementation related to the user interface of digital libraries.
Article
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This paper presents a general overview of possible approaches for implementing recommender systems and describes a specific implementation in the context of the Share.TEC project, which aims to foster the sharing of digital resources in the Teacher Education field. An outline of the main functionalities is given, together with a brief technical des...
Article
Full-text available
This paper presents the Share.TEC system architecture and the first system prototype. This description stresses on the main system components and underlying technologies, standards and protocols. The main system functionalities are following logically from the main use cases and user requirements. The system design allows a tight integration betwee...
Article
This report explains the main functionalities of the first KRSM prototype, and how they can be used, from an end user perspective.
Article
Schoonenboom, J., Sligte, H., Moghnieh, A., Specht, M., Glahn, C., & Stefanov, K. (2007). Pilot evaluation in TENCompetence: a theory-driven model. In T. Navarette, J. Blat & R. Koper (Eds.). Proceedings of the 3rd TENCompetence Open Workshop 'Current Research on IMS Learning Design and Lifelong Competence Development Infrastructures' (pp. 43-50)....
Article
Full-text available
The reported study compares three adaptive learning style scenarios, namely: matching, compensating and monitoring. The matching and compensating scenarios operate in a design-time mode, while monitoring applies in a run-time adaptation mode. In addition, the study investigates the role of pre-assessment and embedded adaptation controls. In order t...
Article
Full-text available
This paper focuses on building a knowledge repository for life-long competence development. It is an essential part of LearnWeb2.0 system designed for stimulating knowledge sharing, knowledge management and the conversion of information into knowledge. The paper discusses the system architecture, the choice of a digital repository, the modelling of...
Article
Full-text available
It is widely recognised that modern European society needs adequate means for lifelong adapted access to facilities that support the creation, storage, use and exchange of formal and informal knowledge and learning resources. The key factor to achieve this is the adoption of information and communication technologies and the work reported here show...
Article
Full-text available
When re-thinking the design of the curriculum for pre-service teachers (in our case in Informatics and Information technologies) we should start with the main question – what these teachers-to-be should prepare their students for? The authors' provide arguments in support of the belief that the school should be oriented to building competences iden...
Article
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This document presents an implementation methodology for the preparation and execution of TENCompetence cycle 3 demonstrator pilots according to the infrastructure currently available. The methodology includes the description of the tasks and procedures needed to be considered from describing the training in terms of competences and selecting the u...
Article
Full-text available
Koper, R., Stefanov, K., & Dicheva, D. (Eds.) (2009). Proceedings of the 5th International TENCompetence Open Workshop "Stimulating Personal Development and Knowledge Sharing". October, 30-31, 2008, Sofia, Bulgaria: TENCompetence Workshop.
Article
Full-text available
Grigorov, A., Georgiev, A., Petrov, M., Varbanov, S., & Stefanov, K. (2008). Building a Knowledge Repository for Life-long Competence Development. In R. Koper, K. Stefanov & D. Dicheva (Eds.), Proceedings of the 5th International TENCompetence Open Workshop "Stimulating Personal Development and Knowledge Sharing" (pp. 21-25). October, 30-31, 2008,...