Some approaches to modeling complex information systems

State-of-the-art of modeling complex information systems is briefly discussed. A distinction is made between macrolevel and microlevel modeling of such systems. Modeling approaches and techniques, appropriate for each of these two levels are described and assessed.     

The use of a website in the implementation of a communication policy in an enterprise

The possibility of using an enterprise’s website to implement its communication policy is considered. The classification of websites is presented and the interconnection of objectives for constructing an electronic representation and its information content is described. The role of an enterprise’s information service employees in the construction, support, and promotion of the enterprise’s website is defined.     

VINITI RAN abstract database: Prospects of information postprocessing using methods of data analysis

The All-Russian Institute of Scientific and Technical Information of the Russian Academy of Sciences (VINITI RAN) is active in the development of information and analysis technologies at a conceptual and practical level, using both its own and available domestic and foreign information resources. The aim of this paper is to describe (in the light of emerging trends in the institute) promising approaches to more in-depth information processing and analysis of available data, as well as to discuss the possibilities for creating new types of information products and services designed to support management decisions, not only in science and industry, but also, indirectly, in the economy as a whole.     

Using expert evaluations to complete centralized library systems

An interactive system of expert evaluations of offers made by the Russian and foreign information market of scientific literature issued in both printed and electronic form is described. The system supports the database of experts and the periodically updated database of offers of the information market. An expert evaluation is carried out over the internet from a special division of the LNS RAS site, access to which is available only to authorized users, i.e., experts. Expert selectors make decisions about ordering various editions for funding from the centralized library system by analyzing tables formed based on processed results from expert evaluations with the help of specially created software tools.     

Periodicals and proceedings in referral databases: Quantitative and qualitative estimations

Using data from Ulrich’s Periodicals Directory, and the extent of coverage by abstract information resources and indices, the worldwide output of periodicals and proceedings (including those represented in electronic form) is studied. A quantitative characterization of the entire output of worldwide editions, as well as its abstracted portion is given. To provide complete reception of needed subject information and cover a maximum number of periodicals using an information system, a method for selecting several databases, which makes it possible to get a maximum coverage of primary sources with a certain amount of duplication, is proposed. Data on abstracting are obtained as the result of analyzing the input stream of approximately 700 databases and indices. Basic statistics for the abstracted stream are given for a number of companies: VINITI (All-Russia Institute for Scientific and Technical Information, Russian Academy of Sciences), CSA (Chemical Abstracts Service), Thomson Corporation, Elsevier, CABI Publishing, CAS (Cambridge Scientific Abstracts), and several others. A list of 25 of the largest abstract journals and referral databases, with respect to the number of periodicals represented in them, is given.     

Problems in the formation of the thesaurus of electronic commerce

The paper describes stages in the formation of the thesaurus of electronic commerce, the obtained practical results, and approaches to the evaluation of economic efficiency based on introducing the thesaurus into the information search system.     

Evaluation of information flows on the ecoeconomy

The paper presents the results of the analysis of information sources, including both traditional print media and electronic resources on ecological and economic problems available on Internet sites. The most significant printed periodicals and Internet sites are determined in a given subject field. The possibility is considered of finding necessary information from an Internet resource with the help of the hypertext structure on the site of the information-retrieval system Ecological Information.     

The architecture of a computerized information retrieval system: Technologies and aids of retrieving in documentary information resources

In the context of system analysis, the architecture of a computerized information retrieval system adjusted to a support professional problem-oriented interactive documentary retrieving is considered. In addition to standard and extended retrieval capabilities, such a system must contain aids for generating and systematizing information files, generating and using components for linguistic support, and aids for estimating and analyzing the results of the retrieval.     

Biomechanical loading in the triple jump

The triple jump is a demanding field event in which a jumper must tolerate extremely high impact forces while maintaining high horizontal speed. The present study was designed to clarify the mechanical loading characteristics and the role of neuromuscular function in the triple jump. Seven national triple jumpers (4 males, 3 females) volunteered to perform 3-6 jumps. The mean best performances were 14.32+/-0.45 m and 11.90+/-0.28 m for males and females, respectively. The three longest triple jumps for each jumper were selected for final analysis. The mean contact times were 0.139 s (hop), 0.157 s (step) and 0.177 s (jump). The largest ground reaction forces were observed in the step (15.2 times body weight), while the highest peak pressures were recorded under the heel and forefoot. The plantar pressure of the lateral side of the forefoot was highly related to the length of the triple jump (P < 0.05-0.01). In addition, electromyograms of both legs Suggested that mechanical loading places high demands on the neuromuscular system, as characterized by the high rate of activation in the pre-activity phase followed by high eccentric activity. Thus, the high activities of the gastrocnemius, vastus lateralis and hip extensor muscles seem to play an important role in preventing unnecessary yielding of the jumper during the braking phase.