The problem of determining the maximum size a ternary code is considered, under restriction that each symbol should appear given number times in codeword. Upper and lower bounds on such codes Hamming metric are discussed, where follow from constructions good codes. Some results obtained by explicitly finding computer search. A table exact values best known for length at most 10 presented.

Digital technologies occupy an important place in today’s developing world. They are also strongly related to new trends educational technologies. In this context, the digital accessibility of environment for people with various special needs is particular concern. A novel tool assessment technological ecosystem, designed provide needs, described paper. The overall structure and initial test system discussed conceptual framework ecosystem its ontological model described. Special attention...

Protection and preservation of our cultural literary historical documentary heritage are particularly relevant today. The paper presents methods for creating digital resources artifacts related to the Balkan war. Special attention is paid process 3D scanning objects. methodology will be used in building an electronic archive Virtual Museum.

The article presents a research on the methods for data organization and building semantic knowledge Holter Monitoring System. A conceptual scheme of this ontology is presented. goal to study identify parameters, analyze classify in HMS repositories using state-of-the-art technologies analyzing storing digital information, on-site HMC ontology.

Digital technologies in present day interconnect globally, providing a dynamic environment to support the educational needs of any learner within novel technological ecosystem. The paper discusses identified aspects relevant digital accessibility learners with various by this ecosystem, such as sensor support, knowledge provision from variety and non-digital repositories, motivation acquire better classroom, museum, or rehabilitation. A tool for assessment ecosystems, called Accessibility...

This paper describes the application of cryptography and steganography in protection cardiac databases. The original data studied were transformed using a Daubechies wavelet transform. next step is to conduct Energy Packing Efficiency-based compression. A watermark added received protect against unauthorized access, before hybrid performed suitably selected encryption algorithm. presented analyzed algorithm includes public symmetric key cryptography. proposed software on real...

Web accessibility is an inclusive practise that ensures everyone including people with disabilities can successfully work and interact websites use all their functionality. The research in the paper investigates problem of web Regional museums Bulgaria compliance recommendations Content Accessibility Guidelines 2.1 (WCAG 2.1), published by World Wide Consortium (W3C). study presents results user experience regarding exhibits them. A methodology for automated testing several software tools...

The article examines issues of web accessibility ecosystems for people with special needs. Methods, models, standards, and technologies related to the structure, design, functionality ecosystem are studied. stages developing an explored. functionalities, content a particular presented. Several themes design system emphasis on its blind users explored analyzed. UX/UI ontological model accessibility, used in implementation elements, A has been developed, compliant Web Content Accessibility...

Accessibility is a multidisciplinary field and requires innovation. People with disabilities are often excluded from the cultural life, especially blind people. None of 55 Bulgarian museums included in study offers them adequate visualization interaction. The research conducted physically challenged people as participants combines physical online tests. results collected through questionnaire

The paper presents a major part of the research work team scientists under project No. KP-06-Н42/4, funded by National Institute for Scientific Research, concerning analysis, evaluation, and improvement digital accessibility people with disabilities. aims to support severe or total vision loss, as well understanding problems they face, ways overcome them. This includes offering methodology assessment, analysis evaluation tested on more than 100 sites documents. Software programmes were also...

We investigate methods and techniques used in digitalization security of the objects multimedia folklore archive. This archive consists unique artifacts stored annotated National center for non-material cultural heritage, Institute Folklore, Bulgarian Academy Sciences. First we different types -- text, images, audio video. apply this research to selected collections artifacts. Next determine metadata appropriate investigated objects. Third describe several applied securing intellectual...

This article discusses the accessibility of public information on Internet by people with disabilities, and in particular visual deficits. Web standards, content basic principles have been considered. A survey websites Republic Bulgaria was conducted. Information group that conducted study is given, purpose study, methodology described. The surveys were 100 administration sites, which are divided into 5 groups. results presented. Conclusions made for sphere Bulgaria. In recent months these...

The problem of finding the values A/sub q/(n,d)-the maximum size a code length n and minimum distance d over an alphabet q elements-is considered. When q/spl les/M<2q, all parameters for which q/(n,d)=M are determined. Methods obtaining upper lower bounds on 4/(n,d) discussed.