Journal archive
IT business |
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Business information systems |
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The article analyzes the structure of the effect of using automated management systems. The
analysis is performed on a structural approach. This article contains two parts. In the first one lists a
number of problems that are universal character and faced researchers in the performance evaluation
of the effectiveness. For each problem there is a brief description. The following is a brief overview
of the most common approaches and methods by which the estimate of effectiveness. Their
number and methodological breadth requires additional approaches to select the right tools to measure
performance. In the second part of this article provides examples of the structure of the IT effect
that can be detected in the works of different researchers. For notes, other researchers of this
domain does not accentuate focus the structure of the IT effect. Then describes the author’s vision
structure of the IT effect and briefly describes possible approaches to evaluating the effectiveness
of the implementation of MIS in accordance with the proposed structure. In conclusion, the authors
again emphasize the special role of the structure IT effects, it plays in the effectiveness evaluation.
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IT management |
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Resource management |
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Hardware transactional memory is finally becoming available in products from major vendors. Intel
announced that a set of transactional synchronization extensions (TSX) is available in it new processor
microarchitecture, codenamed Haswell. The benefits of software simulation of this technology
will remain significant even after processors that support new instructions become available on the
market. The reason for this is that a simulation often provides more flexibility during debugging and
architecture exploration. Transactional memory support in functional simulator is not trivial because
it requires explicit cache simulation, which may dramatically affect performance. It was necessary to
create a flexible reconfigurable model, as public documentation for TSX omits implementation details.
In this paper we describe our implementation of Intel® restricted transactional memory (RTM) instructions,
which are a part of the Intel® TSX, in the full system functional simulator Wind River® Simics.
Our goal was to ensure correct execution of these new instructions while maintaining high simulation
speed that Simics is able to demonstrate.
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Performance management |
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Issues of notification specialists of planning authority of the occurrence of events to be response
timely are considered. The program of visual and sound notification for specialists of writing information
to database is developed to increase the efficiency of distribution of control facilities for spacecrafts.
Description of process of generation messages of the occurrence of events is resulted. It is
shown that messages propagates by Oracle Advanced Queuing. Application of this feature to solve
the task is considered. Description of client part of developed program to listen queue and to display
received messages with sound signal is given.
It is noted that under the conditions of increasing spacecraft constellation, which leading to rising
load on specialists of planning authority, timely response to various events influence on the efficiency
of the constellation control. Distinctive features of task to notification specialists of such structures as
scheduling and planning authorities involved in the control of spacecraft constellation singled out. So
targeting of solving task with a small number of persons notifies are noted.
It is shown that event the receipt of information in the database can be considered as completion
of a one operation and beginning of another. It is noted that an indication of the presence of raw
data exists in the previously developed programs. Description of developed program of visual and
sound notification for specialists of writing information to database is adduced. The implementation
of program is considered. Issues of generation messages of writing information in the database and
enqueuing them by the Oracle Advanced Queuing is covered. The process of dequeuing message
is described. Displaying data from received messages is considered. The possibility of transition to
the processing received data directly from the notification is noted. The tools to implement these features
are adduced. The possibility of notification settings for each user is noted.
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3D modeling |
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Virtual reality |
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The air traffic becomes more and more intensive and the number of emergency situations
on flying fields increases correspondingly. Thus a problem of controller’s readiness to
act properly in the alert condition becomes the urgent issue. However until recent time the development
of effective training tools for air traffic controllers in an airport tower encountered
an insurmountable safety barrier since there is no way to train controllers on the flying
fields of today’s big airports without the risk of a crash. As a result nowadays training systems
for controllers are realized as computer simulators. Such simulators have serious drawback:
— training is carried out on a virtual airport flying field, whereas effective training may take place only
on a real field of a real airport. The paper describes the augmented reality training system for air
traffic controllers. The system allows a safe modeling of emergency situations on the real flying field.
An example: the model for the collision of A380 and CRJ700 in JFK airport in April, 2011.
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IT and education |
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Training technologies |
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Presently estimating students rating envolves a lot of different factors which have to be taken into
account. The rating mark has to follow some regulating documents which enclose recommendations
that are formulated as complex of inference rules that are formulated in wordy («linguistic») form like
«if… then». It is evidently that in these conditions experts are needed for student estimation. As a result
the mark is far from having a single meaning. To overcome this difficulty we propose to use the
methods of fuzzy logic. It was found that for implementation of fuzzy inference algorithms the matrix
representation of fuzzy variables [1] is most effective. In this representation the usage of logic
rules like modus ponens is equivalent to solving of some system of linear equations with the usual
existing conditions of their solution. The comparison of matrix and traditional approaches on different
software and hardware platforms (including embedded and mobile systems) was also realized.
Main advantages of matrix method for are low memory requirements, shorter and easier development.
As a result the proposed algorithm enables automate the procedure of student rating estimation
which sufficiently taking into account expert opinion. In other hand, it makes the student mark
transparent in difficult cases.
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Educational environment |
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The article deals with characteristics of MOOC (Massive Open Online Courses) — high-quality distance
education resources with free access published by leading universities in the world — as an
attribute and a factor of their competitiveness. Trends in the world of higher education will definitely
show that the widespread use of modern information technology in education and research is an important
factor in ensuring and improving the competitiveness of the leading universities, in particular
the introduction of massive open online courses. Today the leading universities in the world de facto
made MOOC an integral part of its educational system. To create such courses one should solve a
number of complex problems ranging from creating a modern industrial and technological base up
to organization of educational process guaranteeing high quality of education within specific conditions
of distance learning designed for the mass consumer. Consequently, MOOC become a factor
increasing the competitiveness of the university through the effective use of modern information
technologies for expanding the market of educational services without losing the quality of education,
which is characteristic for the world-class university. World’s leading universities develop and
publish MOOC, both independently and as part of prestigious international projects. Thus, MOOC is
an attribute of world-class university.
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Software engineering |
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Software development technologies |
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| Models and althorithms | |
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In the publication we discuss the enhancements of image recognition algorithms in two directions.
First, we define the binary descriptors of images as a second-lever features for image recognition
algorithm. They are constructed by a set of feature extraction functions together with an auxiliary set
of «quasi-etalon» image samples. Second, we use a novel prior-learning procedure named «Correction
by Noise Orthogonal Projection». By means of building special subspace of image features this
method leads to considerable decrease of intra-class distance while inter-class distance is practically
unchanged. Thus the probability of valid class partitioning is highly increased.
The subspace is built in two steps: 1) localize a feature space partition which contains the majority
of intra-class differences; 2) construct an orthogonal complement for the partition. This complement
is a target («noise») subspace. To enhance recognition, an input feature descriptor should be
projected to the subspace to reduce noise components.
The article provides the method’s mathematical formalization and experimental implementation.
The implementation is built upon a custom facial recognition system. We compare results of recognition
for several image sets, including well-known open face databases along with our own databases
captured from security video cameras located at places with high rate of people flow.
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Network Technologies |
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The purpose of this work is to significantly reduce the time of development and modification
of experiments automation systems (EAS) software.
The article presents the analysis and classification of the composition and the mode of interaction
of software components in the EAS used for a number of research projects. In such systems,
the experimental method, represented with the conditions and manner of registration data, repeatedly
changed. It is shown that the traditional way of the experimental procedure presentation in the
form of a list of procedure calls leads to a significant loss of time to modify the software (SW) when
changing the experimental procedure. The reason for this — hard coupling of components and the
need to attract programmers to complete the software modification.
A concept of software of distributed
SAE which is integrated automatically of standardized components in an executable format,
which can be used in different experiments without changing of other parts of the system, is presented.
To implement this concept it is needed to develop and standardize
• program of experiment management, • subsystem for descriptions of experimental procedure and making reference to the experiment, • means to ensure the interaction of components — search, system integration, dynamic binding to the remote execution of procedures. The methods to deal with these problems with the use of advanced network technologies are proposed. The means of inter-component communication use the unique identifiers of components instead of network addresses. This method of dynamic components binding takes into account the specificity of the EAS and provides a number of advantages in comparison with that used in the popular technologies DCOM, CORBA, and others. Proposed methods, algorithms, programs are tested in real experiments with neutron sources IBR-2 and IREN. |
Simulation |
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Theory and practice |
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Paper deals with the solutions of dynamical airspace environment development. The aircraft simulator
models generate airspace environment. Each aircraft model simulates an aircraft flight according
to its flight plan. The article presents the air traffic control system structure and determines the
aircraft simulation model, which includes air navigation, and aircraft movement submodels. Objectoriented
implementation allows air navigation submodel to perform several different modes of aircraft
control. There are modes of aircraft control that are implemented in simulation model: aircraft flight
along its flight path, flight under flight rules, flight with reactions on the air traffic control dispatcher
commands, self-separation between aircraft and dangerous meteo areas during flight and various
combinations of these modes. Aircraft movement submodel simulates aircraft flight as mass point
and imply restrictions and characteristics according to aircraft type. It applies flight dynamics specified
by Eurocontrol Base of Aircraft Data. The article describes equations taking into account flight
characteristics. The aircraft model simulates navigation deviations based on performance-based
navigation concept. The paper presents an example of air navigation under Air Traffic Control with
aircraft reactions to Controller — Pilot Data Link Communications commands. Simulation of dynamical
environment model implemented in Delphi object-oriented programming environment with Oracle
database tools. There are researches, which were conducted using this model: flight safety assessment
for new structure of Russian Federation airspace, implementation of airborne ADS-B applications,
including conflict detection and resolution application.
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Actor modeling |
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Emergencies that sometimes arise in the chemical industry (for example, in Sivezo and Bhopal),
which caused the human casualties and pollution of the environment, cause the introduction of increased
requirements for the qualification of Chemical Engineers. The methodology of designing
chemical reactors should include the monitoring and analysis of security. Therefore, the process
design of chemical reactors consists not only of perform calculations, drawing creation and writing
technical documentation of the reactor. Construction of the reactors is not possible without creating
process models and simulators for personnel, taking into account risk situations. Thus, when constructing
the reactor are required: chemical kinetic model that can be represented by means of differential
equations, and model of discrete control system, which, as a rule, can’t be described by
differential equations. Therefore there is a need for a comprehensive discrete-continuous computer
models. V. V. Kafarov was one of the world’s greatest scientists, who created a powerful scientific
impetus for the development of chemical cybernetics. His works became the foundation for further
research in our country and abroad. The unified method of discrete-continuous simulation applied
for controlled chemical reactions is considered in this paper. Simulation model includes two components:
the continuous and discrete components. Continuous component performs modeling of chemical
kinetics. Discrete components is used to simulate and optimize the system control of the reactor.
Matrix of tuples is used for easy selection optimal conditions of the reactor operating. Optimization is
performed by varying two parameters: the reaction temperature and pressure in the reactor.
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Laboratory |
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Decision support systems |
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The article deals with one of the types of advertising campaigns, namely, — ICB-broadcast (Interactive
Cell Broadcast, or «advertising sleeping screens») to convey to the subscribers of any information.
Content services in the telecommunications environment is a rather young field of service,
require thorough justification for funding of such projects. Existing approaches for comparative evaluation
of efficiency of investment projects in practice is not always applicable due to the uncertainty of
the input data, the external environment of the project requirements. In this paper we propose a new
approach based on the methods of the theory of decision making. As tools for the analytical justification
of the alternatives are used Decision support systems (DSS). In the process of scientific research
are identified, collected and structured data for later analysis of advertising campaigns. For optimal
storage of information after the broadcast are modified database «portal subscriptions». To identify
dependencies between cost, time and theme of promotion of the services and forecasting profit from
advertising companies are performed statistical data analysis. Variants of investment projects were
designed aimed at increasing the profits from advertising campaigns (ICB-broadcasting): «Development
of services with low interest»; «Supporting Organization popular services»; «The development
of media services»; «Conducting targeted advertising, targeted at different groups of users.» Using
publicly available DSS Expert Choice 11.5 and Expert decision support systems (EDSS), developed
under the guidance of the author, was selected the most effective and least risky project «Supporting
Organization popular services.» That this project has the minimum cost, minimum risk of failure
of the timing of the project management and profit that is closest predicted.
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Study of processes and systems |
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Ecological processes in the face of rapid changes in the environment as an object for the computer
simulation requires a flexible approach to the analysis. Article devoted to applications of the
conceptual structuring of ideas about the interaction natural and anthropogenous factors on the basis
of cognitive models. The formal analysis of pulses in the sign graph in the context of the situation
degradation bioresources of Caspian Sea has promoted the development of original hybrid dynamic
systems for modeling sturgeon fish reproduction. It is shown that the choice of the mathematical
approach to the description of the situation can be based on the results of cognitive analysis of the
ecological relationships. At the conclusion of results of computational studies should logically follow
the newly theoretical interpretation of the observed changes in behavior of models. Chosen structure
of the new models allows us to consider various scenarios of environmental emergencies. In cognitive
oriented graph possible to make hypotheses, but to assess the abrupt changes necessary to
investigate the nonlinear dynamics of the trajectory of some key characteristics, which for the Caspian
Sea is the effectiveness of fish spawning. In such models often arise bifurcations of attractors
with the appearance of cycles that effect on environmental implications.
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Teacher’s portfolio |
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Mathematical models in economy |
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It is shown in the article that the architecture of the information system is primarily determined by
the specifics of the current state of the object of research. Practice development and functioning of
information systems suggests that the transformation of the object change and methods of its study,
therefore, the construction of the processing rules necessary to determine the most likely forecast
the state of the object.
It is shown that more objective data have the reservation system, so how can on-line to determine the number in the sale of tickets of each type of tariff. Therefore, the presentation layer information system can be based on the appeal to the reservation systems and established by government agencies bets ground service. Layer the business logic of the conceptual architecture of the information system should be data-handling procedures. Including them can make such indicators as the weighted average cost of the air ticket of economic class, the comparison of the weighted average price of air tickets for the flight with the same indicators in a comparable number of passengers and the distance of the internal and external transportation, mapping the dynamics of changes in the weighted average ticket prices, changes in the weighted average price of the air ticket for a flight before and after the arrival of new airlines or after exit from the market competitors. Thus the application architecture, allowing the use of a system based on collecting, storing and processing information simultaneously to multiple Federal agencies with the development of forms of representation data in accordance with the objectives of the authority, allows to significantly reduce the cost of their implementation. |
