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Digital ecosystems represent a new technology capable of interconnecting heterogeneous, cross-domain platforms, able to drive innovation in different industries, enabling us to connect and operate with a wide range of actors, customers, partners, companies. Digital ecosystems can be considered as socio-technical clusters of adaptive applications with different levels of context awareness, adaptability and autonomicity. The adaptive properties of an organism are closely related to the self-organizing property and t...

For processing observations of the terrestrial pole dynamics, the regression dynamic modeling (RDM) approach was used. With the RDM software package the models describing the dynamics of the terrestrial polar coordinates were built. This approach provides accurate combined models of observations which describe to some extent causal and deterministic communication and provide forecast of characteristics. A comparison of observations and predicted values of the terrestrial polar coordinates obtained with the RDM app...

Machine learning covers a wide set of supervised and unsupervised algorithms for solving prediction, classification and anomaly detection problems. One of the areas of their applications is for customer churn prediction. To build a model for predicting the switching of customers, data scientists use different demographics, social, transactional, behavioural metrics and features. At the same time, most of the small Bulgarian companies still don?t have the needed versatile and complete customer data. They rely mainl...

The low ionospheric monitoring by very low and low frequency (VLF/LF) radio waves generates big databases containing information on high temporal resolution relevant to specific spatial areas. These data allow us to detect and model perturbations induced by different events. In this paper we present analyses of data relevant to periods around natural disasters. Our attention is focused on the tropical depressions which have been detected before the hurricane appearances in the Atlantic Ocean and the earthquake occ...

Deformation analysis represents an actual and important theme, therefore methods for improving the tracking and analysis process of deformations, both for constructions and for lands, as well as diminishing the necessary time for deformation analysis, are the main concerns for the specialists and not only. When it comes to major constructions or constructions of particular importance, deformation analysis proves to be an extremely important tool. The results of the analysis can be used in decision-making systems f...

In the article, the authors provide the analysis of the industry state in the field of software and hardware development on the FPGA basis. The primary emphasis is on high-level synthesis (HLS) tools, which allows making a custom design by a non-RTL engineer. The key factors limiting the extensive introduction of HLS in the industry are determined: in most cases is not allowing to get a good solution without an understanding of target microarchitecture and synthesis method; too complicated and unpredictable tool b...

This paper is about how to build a cheap modern temperature control system on an existing manufacturing system. The authors designed and implemented the control system to a tunnel type furnace for burning bricks used in constructions at SICERAM S.A. Company, Sighisoara, Romania. The bricks manufacturing phases are described in order to help the reader to understand the process complexity and the graph of the entire loading/unloading process is shown together with the tunnel furnace schematics. Then, the graphical ...

The first results of using adaptive regression modeling (ARM-approach) in description of the latitude periodic change are analyzed. A multicomponent (polyharmonic) model of the latitude part observed dynamics containing between 14 and 21 harmonics requires interpretation and autoregressive forecasting of the 6th order providing high accuracy for the period of two years. This article provides the analysis, modeling, and forecasting of the latitude periodic change using the ?Automated System for Robust Modeling? (AS...

The article deals with the modeling of the structure of the e-learning website with the possibility of changing the user interface in accordance with the information needs of users. The most popular content management systems (CMS) and learning management systems (LMS) have many necessary features, including using an uncluttered modern editable interface and configurable LMS front page of the e-learning course. But, as a rule, these systems do not contain the component that would be responsible for the ability to ...

Methods of deductive inference that are various modifications of the principle of resolutions are quite effective in logic. The results and justifications for the fuzzy conclusion of the resolution type are widespread in the predicate calculus. The existing models of the resolution inference are effective, and also quite simple and convenient, for conventional reasoning under incomplete information and for automatic processing of uncertain knowledge in interactive systems. However, in such models the set of genera...

Authors describe the novel approach to boost the scientific data analysis performance with the data-storing schema for distributed scientific research systems. This approach optimizes the workload on storage nodes and enhances the computation performance. Managing the enormous output of scientific research systems is expected to be the most technically difficult part of all recent projects producing Petabytes of imagery data. In this paper we describe the distributed storage structure with indexing techniques whic...

Actual tasks in development, configuration, utilisation and support of complex technical, economic and natural systems require a deep understanding of its internal processes. System dynamics discipline is devoted to that problem and let to researching and analysis the complex systems behaviour. The base of it is a numerical method for dynamic system modelling. Modelling processes for real systems require significant computational resources (time and power consumption). Authors provide the approach to the optimisat...

A model of traffic dynamics of the University server node is described, interpretation of the proper model components is carried out, and the interval of a satisfactory forecast is estimated. Currently, corporate computer networks play an important role for the successful functioning of various organizations. Herewith, the number of each network users gradually increases, which contributes to an increase in the circulating information content and, accordingly, worsening the quality of network services. To date, li...

Modern versions of the ASRM-2017 (Automated System for Robust Modeling) package provide a solution to a large range of problems associated with modeling surfaces and gravity fields of planets. However, their application requires creation of not only the global models but working models of the local surface areas as well. Currently, these regional geopotential models are in high demand in geology and oil exploration. To solve the problems of this kind, the special algorithms were created and implemented because the...