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Ecosystems are open adaptive systems with self-organizing properties; they are based on local interaction of the composing elements and generating a general end-result. Digital ecosystems incorporate these features in context-aware applications that work together for the efficient solving of complex dynamic problems. This article considers the digital ecosystems as being open-system of applications with a certain degree of context-awareness. It also presents Econtxt a programming model for the context used by cont...

The paper presents a method for authenticating images that were shot using a mobile phone. Thanks to the newest advances in integrated cameras, smartphones represent one of the most popular ways to take a photograph. A picture could be critical evidence in a trial and, with the abundance of free editing software, a forgery is easy to achieve. A method to secure and test photographs for authenticity was developed, implemented as a mobile application, tested and detailed in this paper. The watermarking algorithm is ...

The commutation of inductive low voltage circuits of alternating current is accompanied by the occurrence of commutation over-voltages, often hazardous for the components of the electrical circuit. This paper describes a modern method for studying transitory regimes which occur at the disconnection of inductive circuits, based on the usage of a data acquisition system type NI-USB 6003 manufactured by National Instruments. The software used is Matlab, and the data acquisition method is based on Matlab programming. ...

Paper deals with important aspect of organization and implementation of transport operations and transport processes between points of origin and points of consumption in order to meet requirements of GS1 standards to fulfill supply chain needs. Designed information system (hardware, software and communication features) is installed on each logistic unit (wagon, container etc.). This allows to use extended self AutoID functions for low level data preprocessing. Paper focuses on train composition of both rail and r...

The authors of this paper developed a concept that can be used for automatically car parking; the concept is based on finding the obstacle free spaces around the vehicle and it uses methods to guiding the car in an available found parking place. The car sensing system includes ultrasonic sensors to measure distances, proximity sensors to detect obstacles and a rotative position sensor to measure the vehicle displacements. A microcontroller based central processing unit (CPU) was used to process sensorsпїЅ informat...

Steganography can be used for illegal activities. It is very important to be prepared. To detect steganography images we have counter-technique known as steganalysis. There are different types of steganalysis, depending on if the original artifact (cover) is known or not. In terms of practical use, most important are methods of пїЅblind steganalysisпїЅ, that can be applied to image files and because we do not have the original cover for comparison. This article deals with the application of neural networks on the ...

The paper deals with the fundamental rule of extensional logics, namely the rule of Existential Generalization. This rule can be applied in the situation when a function f is applied on its argument a to obtain the value of f at a. If the application does not fail, i.e., if the function f is defined at a, then we can existentially quantify, and derive that there is the value f(a). Our system is based on Transparent Intensional Logic (TIL). Since TIL is a hyperintensional, partial, typed lambda calculus, we examine...

In industrial power installations are encountered situations on the connection of inductive circuits to alternating voltage sources. These operations are accompanied by the occurrence of specific transitory regimes after which might occur over-voltages peaks which can become hazardous for the components of the circuit. The assessment of these over-voltages and of other specific electrical parameters represents the purpose of this paper. The measurement method is based on the usage of a data acquisition system prod...

The disconnection of inductive circuits from an alternating voltage source is accompanied by the occurrence of over-voltages, which often are hazardous for the components of the electrical circuit. In this paper is described a modern method for studying transitory regimes which occur at the disconnection of inductive circuits, based on a data acquisition system type NI-USB 6003. The software used is LabView and it is also developed by National Instruments, the developer of the data acquisition system. The paper ap...

This paper describes the optimized algorithm for searching Hamiltonian path in graph. Formerly a similar algorithm was developed for the finding of the optimized path in terrain for finding of the precise positioning of Global Navigation Satellite Systems (GNSS) via Real Time Kinematics (RTK) method. The aim of this method is to achieve quality GNSS observation on all the points in question, so that the total length of the path within all these points can be minimized. There are nodes of two types in the graph: 1)...

In spatial data processing, the area of legislation is crucial but often neglected by the expert's community. Knowledge of the various legal aspects related to the data collection, data processing, and analysis of data, as well as publishing the results of spatial analysis and its visualization, is an essential prerequisite for effective work. Legislative aspects are understood as a set of legislative standards, their relationships and their influence on other fields of human activity. In the context of geoinforma...

For the last few decades the information technologies have become an inseparable part of the modern society life. Their level is one of the key indicators of the countryпїЅs scientific and technical progress, which determines the quality of life of the citizens. Today the thing is that an effective functioning of national economy, research or services sectors branches is impossible without their integration with advanced information and (or) communication technologies. Due to the integration we have such synthetic...

Structure-independent databases are widely used in different spheres for specific tasks solving. Nevertheless, their main problem is a low efficiency that prevents them to be in progress. This work is concerned to the problems associated with data insertion. The causes of this low performance can be called the use of the existing object method of procedures creation and heterogeneity of the data insertion procedures creation process. This process uses object representation form for process of data insertion proced...

The results of research conducted in the field of development and application of mobile systems in problems of monitoring extreme weather situations (EWS). The proposed methods and development models take into account modern technologies like Map Reduce, Hadoop Java API, use of a precedent knowledge base about similar situations. The study places considerable emphasis on ensuring the reliability of the database and knowledge. Implementation of monitoring involves the use of a cloud of drones and other information ...

The paper consists of a method to implement a control system algorithm for an inertia wheel inverted pendulum. Like any control system application, the transfer function of the plant should be known in order to design the proper controller. The key point of this paper is that the behaviour of the plant is consider unknown, so a system identification should be done at first. Even if the classical way to obtain the transfer function is by writing the physical equations, the result obtained from system identification...

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. For example, NASA's EOSDIS produces several Petabytes of uncompressed data per year and w...

Steganography is part of security science that deals with art of data hiding. Modern steganography can serve as an effective tool for hidden data transfers or watermarking for various computer formats, like JPEG, PNG, and MPEG. But it can be misused for stealing data or information transfer in illegal activities too. Most of today available steganography tools are free for use with easy user interface. This significantly increases the risk of exploiting in business sector. Revealing this data is very difficult and...

The e-learning system eLogika serves for teaching logic. In the system there are study materials at studentsпїЅ disposal, but it also provides online tests and promotes all the activities in which the students can obtain their credits. The system collects data about users who are logged in, e.g. time spent on a particular activity, the number of activities performed by particular students, what data is a student interested in, etc. The goal of this paper is to describe the application of many-valued formal concept...

Paper deals with important aspects of organization and implementation of transport operations and transport processes between points of origin and points of consumption in order to meet requirements of GS1 standards to fulfill supply chain needs. Requirements for smart transport units are defined from point of view standards and logistic processes. Smart logistic unit is equipped by designed information unit (hardware, software and communication). This information unit processes raw data from logistic or transport...