Abstract: The group of motions of the Lobachevskii plane, as well as that of the Euclidean plane, is generated by reflections in straight lines.This allows ones to develop an approach to constructing the Poincaré model of Lobachevskii plane based on the properties of inversions and pencils of circles in the Euclidean plane.

Abstract:

The work is devoted to the problem of customizing the user interfaces of an information system that integrates data. An adaptive interface serves as one of the means of organizing the presentation of subject domain data. The issue of using the semantic relations of ontology to select data corresponding to the objectives of the study is investigated. A model of an adaptive interface is considered, which allows the most accurate reflection of the needs of a researcher within a particular subject domain. It is shown how the adaptive interface is formed by means of the semantic library model.

Abstract: The article focuses on the experience of choice and connection of electronic-library systems in the Perm State Humanitarian Pedagogical University. The efficient use of the information resources is analyzed. The foundation of the electronic library, its aims and objectives, presented resources are described. The main emphasis is given to the reflection of the university intellectual products and students’ and teachers’ access to them.