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Veliko Turnovo, Bulgaria

The St. Cyril and St. Methodius University of Veliko Tarnovo is a Bulgarian university based in the city of Veliko Tarnovo. It was established on 15 September 1963 as a pedagogical institute. The university is the second largest in Bulgaria after Sofia University. It is named after the creators of the Bulgarian alphabet St. Cyril and St. Methodius. The first four disciplines were Bulgarian Philology, Russian Philology, History, and Arts. Since then, the university has grown to become the largest one outside Sofia, with over 60 different disciplines in 8 faculties being available to students, as well as two colleges in Pleven and Vratsa. Wikipedia.

Bouyukliev I.,Bulgarian Academy of Science | Georgieva-Trifonova T.,University of Veliko Tarnovo
Electronic Library

Purpose - The aim of this paper is to propose the bibliographic information system 'Personal eLibrary bgMath'. This is a system for the organisation, storage and usage of digitalised literature. It supports the user in organising his/her publications and his/her library of electronic issues. The system is very convenient, especially for scientific literature. Design/methodology/ approach - The methodology to design a database storing information about publications and other literature is presented. The entity-relationship model of the database is described. The relational tables, obtained after the transformation of the created ER model into a relational model, are given. The paper contains the description of the forms implementing two basic tasks of the presented program, i.e. input and search for publications. The database is implemented by means of the database management system Microsoft Access 2007. Findings - The system Personal eLibrary bgMath allows easy manipulation of materials (papers, dissertations, reports, etc.) and references, which are used frequently and are very often necessary in scientific activity such as research, writing papers and dissertations, preparing reports and web pages or application documentation. The proposed program is free and a user guide is available. Originality/value - This paper proposes a practical method for creating a bibliographic system for scientific literature and explains its basic functional features. © Emerald Group Publishing Limited. Source

Bouyuklieva S.,University of Veliko Tarnovo | Bouyukliev I.,Bulgarian Academy of Science
IEEE Transactions on Information Theory

An efficient algorithm for classification of binary self-dual codes is presented. As an application, a complete classification of the self-dual codes of length 38 is given. © 1963-2012 IEEE. Source

Bouyuklieva S.,University of Veliko Tarnovo | Malevich A.,Otto Von Guericke University of Magdeburg | Willems W.,Otto Von Guericke University of Magdeburg
IEEE Transactions on Information Theory

Let C be a binary extremal self-dual code of length n ≥ 48. We prove that for each σ ∈ Aut(C) of prime order p ≥ 5 the number of fixed points in the permutation action on the coordinate positions is bounded by the number of p-cycles. It turns out that large primes p, i.e., n-p small, seem to occur in |Aut(C)| very rarely. Examples are the extended quadratic residue codes. We further prove that doubly even extended quadratic residue codes of length n=p+1 are extremal only in the cases n=8, 24, 32, 48, 80, and 104. © 2010 IEEE. Source

Donchev I.,University of Veliko Tarnovo
Informatics in Education

C++ is the most commonly used language in introductory and intermediate programming courses in Bulgarian universities. In recent years this language has developed greatly. Its abstractions are more flexible and affordable than ever before. Such great number of changes are related to the launch of the new standard (known as C++11) that we have grounds to consider it even a new language. It is inevitable to reflect all these changes in training courses and this prompted us to consider not only some updating of academic curricula but also a comprehensive reorganization of our programming courses. So, in this article we share our successes and difficulties in this direction. © 2013 Vilnius University. Source

Galabov M.,University of Veliko Tarnovo

This article presents a new concept of using the auto-focus function of the monoscopic camera sensor to estimate depth map information, which avoids not only using auxiliary equipment or human interaction, but also the introduced computational complexity of SfM or depth analysis. The system architecture that supports both stereo image and video data capturing, processing and display is discussed. A novel stereo image pair generation algorithm by using Z-buffer-based 3D surface recovery is proposed. Based on the depth map, we are able to calculate the disparity map (the distance in pixels between the image points in both views) for the image. The presented algorithm uses a single image with depth information (e.g. z-buffer) as an input and produces two images for left and right eye. Source

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