2015, volume 19, №5 Download full version of issue

Title of Issue PDF

Editors Remark PDF

Part A: Mathematical and Computer Modelling

Part A: Content PDF

Classified Image Enhancement Method Based on Histogram Characteristics in YCbCr Color Space PDF

Lijing Tong1, Jingzhong Wang1, Sam Li2, Ke Xiao1, Quanyao Peng3


1College of Information Engineering, North China University of Technology, Beijing, China
2Palo Alto Networks Incorporation, Santa Clara, California, USA
3Beijing 58 Information Technology Co., Ltd, Beijing, China

Color image enhancement in YCbCr space is an important task since most of the color image signals captured from the embedded camera or the professional video device are YCbCr image signals. Prior classical color image enhancement methods like linear transforms such as binarization, piecewise-line transform, and gray-level slicing, or non-linear transforms such as logarithm transform, index transform, and power-law transform did not consider possible histogram characteristics, and thus their enhancement performance on different image types would be degraded in some cases. In this paper, a novel classified image enhancement method based on CbCr and Y histograms is proposed to address the aforementioned problem. First, captured images are divided into two types, document image and scene image, according to the normalized chrominance histogram characteristic. For the document image, a filter is applied in space domain to get a better foreground and background. For the scene image, three different types are divided by the normalized luminance histogram characteristics. Then, three different processing schemes are applied to the three types of scene images respectively. Experimental results on different images with a variety of variations verify the effectiveness and robustness of the proposed method.

Modelling and simulation of CNTs- and GNRs-based nanocomposites for nanosensor devices PDF

Y Shunin1, 4, S Bellucci2, Y Zhukovskii1, T Lobanova-Shunina3, N Burlutskaya4, V Gopeyenko4


1Institute of Solid State Physics, University of Latvia, Kengaraga Str. 8, LV-1063 Riga, Latvia
2INFN-Laboratori Nazionali di Frascati, Via Enrico Fermi 40, I-00044, Frascati-Rome, Italy
3Riga Technical University, Institute of Avionics, 1 Lomonosov, Bld V, LV-1019, Riga, Latvia
4ISMA University, 1 Lomonosov, Bld 6, LV-1019, Riga, Latvia

The main objective of the current study is to demonstrate the implementation of advanced simulation models providing a proper description of the electronic properties, electrical conductivity, electromagnetic and electromechanical phenomena of functionalized CNT- and GNR-based nanostructures of different morphologies and their interconnects for nanosensor and nanomemory systems. The sensitivity of the local electronic density of states to external influences (mechanical, chemical, magnetic, etc) on the fundamental electromagnetic properties of CNTs, GNRs and their metal interconnects have been analyzed from the point of view of nanosensor applications. Nanoporous systems are considered as complicated ensembles of basic nanocarbon interconnected elements (e.g., CNTs or GNRs with possible defects and dangling boundary bonds) within the effective media type environment. The model of nanocomposite materials based on carbon nanoсluster suspension (CNTs and GNRs) in dielectric polymer environments (e.g., epoxy resins) is regarded as a disordered system of fragments of nanocarbon inclusions with different morphologies (chirality and geometry) in relation to a high electrical conductivity in a continuous dielectric environment. The electrical conductivity of a nanocomposite material depends on the concentration of nanocarbon inclusions (in fact, carbon macromolecules). Various nanocomposite morphologies are considered and computer simulation results are discussed.

Part A: Authors’ Index PDF

Part A: Cumulative Index PDF

Part B: Information and Computer Technologies

Part B: Content PDF

Maximum of load database of GPS service with recovery PDF

Victor Boicov


Department of Electronics and Telecommunications, Riga Technical University, Riga, Latvia

The paper analyzes the database global position system (GPS) services load with recovery. A mathematical model of the interaction with the database services is developed. On the basis of mathematical modelling procedures for the exhchange services, the possible delays and the presence of large queues to services are defined. Suggestions to improve the exchange of services are developed. Development of an integrated transport management system enables to solve a local task of reducing the “order-delivery” cycle and creating a positive image for the company in the eyes of the clients due to accurate execution of undertaken obligations related with order execution terms, minimization of the delivery failure risk and the opportunity of creating a flexible feedback system

Part B: Authors’ Index PDF

Part B: Cumulative Index PDF

Part C: Operation Research and Decision Making

Part C: Content PDF

Solving problems of geriatric care in the Republic of Kazakhstan based on new ICT trends PDF

R Muhamedyev1, E Muhamedyeva1, A Mansharipova2, V Chaykovska3


1 IITU, Kazakhstan
2 KRMU, Kazakhstan
KNMU, Kazakhstan, Institute of Gerontology of NAMS of the Ukraine, Ukraine

In recent years, the measures to improve geriatric care of the population are taken in the Republic of Kazakhstan. Relevance of this issue is determined by a population aging on the one hand, and by RK humanization policy on the other hand. Consideration of these issues is impossible without corresponding data support, which is necessary for organizational tasks and for the entire cycle of medical data processing, starting from data collection, through a comprehensive analysis and issue of recommendation. Using modern software, communication and intelligent technologies promises not only improving of geriatric care quality but reducing the cost and obtain social-economic benefits. The article introduces the problem of geriatric care in Kazakhstan and offers an approach to the solution based on the new trends in the field of ICT.

Decision making in ITSM processes risk assessment PDF

V Grekul, N Korovkina, K Korneva


National Research University Higher School of Economics, 20 Myasnitskaya Ulitsa, Moscow, 101000, Russia

This article is dedicated to enterprise risk management, specifically the problem of subjectivity of decisions made on different phases of risk management process, risk assessment in particular. Quality of decisions strongly affects the effectiveness of risk management process as a whole; at the same time, standards regulating risk management do not provide any instruments to support the decision-making process. The main objective of this study is to decrease the subjectivity of decisions made during the risk management process by integrating decision theory tools into the risk assessment phase. As a result, an approach to risk assessment using Analytical Hierarchy Process is introduced; the approach is then implemented to IT Service Management processes.

Part C: Authors’ Index PDF

Part C: Cumulative Index PDF

Part D: Nature Phenomena and Innovative Engineering

Part D: Content PDF

Computer-mediated environment as a new technological real virtuality triggering virtual identity development PDF

T Lobanova-Shunina1, Y Shunin2


1Riga Technical University, Faculty of Mechanical Engineering, Transport and Aeronautics, Latvia
2Institute of Solid State Physics, University of Latvia, ISMA University, Latvia

In contemporary higher education, it has become a commonplace to emphasize that our globalized world is undergoing an identity crisis. The signs of this crisis particularly in social and cultural spheres are abundantly increasing as we go through the global, postmodern and information era in which the concept of identity turns out to be more complex than ever before.
This paper explores significant trends in contemporary higher citizenship education including a specific focus on the role of ITs and communication technologies, as well as new emerging technologies on the development of new emerging identities, particularly, virtual identity.
The purpose of this paper is to bring together various elements that represent the complex conceptuality of virtual identity within technological society. It engages into a research of what awareness young people are now getting of new information and communication technologies and how global media may possess the potential to transform their identity and in what way educational institutions should understand and respond to this evolving virtual reality.
In this paper, we address these issues both from a quantitative and qualitative standpoint. The key issues under research include the Systemic approach to identity formation as a synergy of information and communication technology (ICT) and virtual reality in citizenship education at Riga Technical University, Faculty of Mechanical engineering, Transport and Aeronautics (Riga, Latvia). The Sociometry method and Optimization theory are the factors that integrate all the elements.
The research results have demonstrated that the Tree-model of identity development offers a methodology for identity construction by evaluating virtual reality as the potential for the development of a creative personality. Implementation of the obtained research results can contribute to the working out of a scientifically grounded concept providing recommendations for the efficient strategy of identity formation in a computer-mediated global environment.

Part D: Authors’ Index PDF

Part D: Cumulative Index PDF