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  Тип елементу:Документ,

  Combined Models for Forecasting the Air Pollution Level in Infocommunication Systems for the Environment State Monitoring

  Kuchansky, Alexander

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  Biloshchytskyi, Andrii

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  Andrashko, Yurii

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  Vatskel, Vladimir

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  Biloshchytska, Svitlana

  (Institute of Electrical and Electronics Engineers Inc., 2018)

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  The combined models of selective and hybrid types with indexation of time series for forecasting the level of air pollution in infocommunication systems for monitoring the state of the environment are developed. Indexing in these models takes place on the basis of the nearest neighbor's method with selected metric distances. Described models allow to achieve a higher precision of short-term and medium-term forecasting compared to the models included in the base set of these combined models. Models and appropriate methods can be used in the development of info communication systems for monitoring the state of the environment and hardware-software complexes of general environmental monitoring. © 2018 IEEE.

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  Тип елементу:Документ,

  Anticipative Approach to Project Management for the Creation of Distributed Information Systems

  Morozov, Viktor

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  Kalnichenko, Olena

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  Liubyma, Iuliia

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  Любима, Юлія

  (Institute of Electrical and Electronics Engineers Inc., 2018)

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  Models of IT projects for the development of distributed information systems are proposed for consideration. Concepts and their interrelations under the influence of turbulent dynamic changes are defined and discussed. A process model of proactive approach to managing changes in IT projects is proposed. © 2018 IEEE.

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  Тип елементу:Документ,

  Assessment of performance of a distributed information system based on time profile

  Savchenko, V.

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  Matsko, O.

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  Vorobiova, V.

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  Kizyak, Y.

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  Duhanets, V.

  (Technology Center, 2017)

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  The problem of determining performance parameters for distributed information systems, which are formed by heterogeneous hardware, is examined. The information system, designed to perform distributed computing, based on the interaction between elements, is presented in the form of a combination of operation processes of software objects (agents) in interaction with operators. To provide a possibility of algorithmic and quantitative analysis of the system's operation process, the authors used time diagrams, which can be obtained based of time profiles of serial and distributed actors. Construction of the time profile of an actor is provided by knowledge of the sequence of performed actions and the average time to perform each action. Based on the knowledge of a typical time profile, estimations of different kinds of performance were obtained and the ratio, linking the main forms of performance to a variety of quantitative characteristics of the system, was derived. As the key indicator of performance assessment, it is proposed to apply throughput, which for a serial actor is the ratio of loading of an actor and total time of actions per task. It was shown that within a single distributed actor, total throughput remains constant regardless of redistribution of the number of tasks between serial actors. As another performance indicator, it is proposed to apply response time of the system as the average time to fulfil a task by an actor. Relationship between response time and throughput of the system was established analytically. It was determined by modeling that at an increase in throughput, response time of the system decreases, reaching 0 at a certain ratio of throughput and the number of fulfilled tasks. The introduction of these ratios, in addition to the key indicators, also makes it possible to determine derivative parameters of the system, such as minimal computation time, average time of waiting for requests and amount of memory, required to fulfil tasks. In this case, it was determined that the minimum computation time is a magnitude, dependent on the capacity of an actor and the number of actions performed, as well as the ratio of computation time and exchange time. The average time of waiting for a request is the difference between total operation time and direct time for fulfilling the task by actors. The amount of required memory is determined based on knowledge of amount of memory, involved in performance of certain processes and atomic operations. Presented ratios make it possible to evaluate quantitatively parameters of distributed information systems and to synthesize systems with assigned parameters of throughput and response time. © V. Savchenko, O. Matsko, V. Vorobiova, Y. Kizyak, V. Duhanets, 2017.

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  Тип елементу:Документ,

  Proactive project management for development of distributed information systems

  Morozov, Viktor

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  Kalnichenko, Olena

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  Liubyma, Iuliia

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  Любима, Юлія

  (Institute of Electrical and Electronics Engineers Inc., 2017)

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  In this article, we will look at proactive management of distributed projects, based on creation and development of distributed information systems. We will unveil the particularities of distributed IT projects as a complex adaptive system that evolves under multiple interrelated constraints. © 2017 IEEE.

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  Тип елементу:Документ,

  Managing projects configuration in development distributed information systems

  Morozov, Viktor

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  Kalnichenko, Olena

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  Liubyma, Iuliia

  ;

  Любима, Юлія

  (Institute of Electrical and Electronics Engineers Inc., 2017)

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  A consistency relation between project elements, arises as a result of the optimal project configuration synthesis and IT-projects for newly created and development of distributed information systems were studied. Formalization of the following concepts was done: components of projects product, projecl element, project element characteristic, consistency relation It was shown that a consistency relation occurs between project element characteristics and it is anti-reflexive and anti-symmetry. Project configuration showing the consistency relations between the project element characteristics was shown. © 2017 IEEE.

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