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All around the world, domestic birds are a major threat in the field of agriculture causing damage to economic field crops, storage houses and also dirtying human life areas. Such most common pest birds in many countries are House crows (Corvus), Common myna, Jungle myna, Brahminy starling, White-cheeked bulbul, Acridotterestritis etc. In order to distract these birds away, many traditional methods...
The paper deals with the analysis of light propagation by optical fibers with two polarization planes. The theoretical part had already been verified by measurement, inclusive of the basic functional verification, and now a bit error rate measurement method is presented which is a key parameter in evaluating the influence of changes in light polarization when the light passes through a transmission...
Environmental monitoring and management are activities of global importance. The digital data from sensors in real time that plays important role in order to provide effective ecological monitoring.
In the given article described principles of modeling of the transformations elements of power sources control. The classical methods of modeling of transformations circuits do not provide necessary accuracy due to complexity of representation of interdependence between input and output quantities and parameters, and the difficulty in representing inter chain and inter chain dependencies and providing...
Nowadays, vehicles have become a very significant role in transport system which a significant issue in various cities around the world, especially in developing countries resulting in turn traffic congestion, massive delays, increased fuel wastage. There are many alternative systems, such as parking places, building bridges. However at the present time, Intelligent Transport System is becoming more...
This paper presents a system architecture that designs a querying refinement method. The method employs the general principles of facet analysis in a particular paradigm, as well as the notion of ‘focus’, which is a sort of context for a user query. The method provides the user with contextual information about the query, which is computed by using the user documents provided that the documents are...
In this article were analyzed existing models of access control in information systems, and was explored an extended model of building access control for an automated information and library system. As the operating factor on the proposed model, operators and their functions were chosen. In addition, the generalized structure and algorithm of the proposed model is given.
We analyze moment-based bounding approximations on the expected value of a utility function. We show that optimizing these bounds yields a solution, which is mean-variance (MV) or MV-skewness-kurtosis (MVSK) efficient depending on how many moments are included in the approximation. To illustrate the approach we apply it to an asset allocation model with a shortfall utility function. Numerical results...
This article discusses the features and trends of development of the process of implementation of multimedia systems in various fields, research substantiates the basic concepts of multimedia systems, information flow, describes the classification and characterization of information flows and systems. Described container TIAV, which is designed with all the modern features and is aimed at future trends...
Energy hole is regarded as one of the challenging issues in wireless sensor networks (WSNs). According to this problem, nodes that are closer to the sink lose their energy earlier than other nodes. Consequently, it leads to the early breakdown of the network. One approach for preventing this problem is to use mobile sink rather than one or more sinks with fixed positions. Also, using fuzzy logic and...
Random numbers are critical in every cryptographic fields. They can be used as cryptographic key, seed, nonce, initialization vector, etc. In this paper, new (pseudo) random number generator (PRNG or RNG) based on computer's source is proposed. The principle of method consist in collecting (nearly) random sources produced from computer and used it as seed for (pseudo) random number generation. Random...
The software composition using high-granularity entities nowadays is a common practice. The process of software composition is supported by various CASE tools. First tools were made on the basis of very simple formalisms (e.g. intuitionistic propositional logic). During the years the tools evolved to more efficient ones, which are able to deal with concurrency, multiparty sessions and other advanced...
Research into the security of the Internet of things is increasingly attracting the attention of the scientific community. This study examines three key security requirements, with an emphasis on Internet systems of things: authentication, privacy and access control. Attention is focused on security issues that have not been resolved to date, and also addresses the problems and future trends in the...
Fleet management systems have been widely used in the maritime industry. Traditional fleet management systems focus on the whole vessel/ship. With the emergence of the Internet of Things and new smart technologies, smart fleet management systems are now embedded with greater power in comparison with traditional solutions, e.g. can be used to monitor the performance, status and behaviour of not just...
The paper presents an overview of contemporary approaches to application of virtual reality systems for training of operating personnel for man-machine systems. Special emphases are made on application issues of virtual and alternate reality systems connected with probable cognitive dissonance in operation of real physical objects. The prospects of virtual reality application in professional training...
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