Abstract: The subject of research is the process of creating a computer simulation simulating the conducting a clinical laboratory analysis of biological fluids using a biochemical analyzer Stat Fax® 1904+. Particular attention is driven to the components of the training simulator and to the algorithm for work with it. The article presents features of developing the virtual instrument, caused by its teaching assignment, which consist of the different training levels of users of the system and the possibility of incorrect input data. The author proposes to create three types of users and design features of the software to ensure the accuracy of the data and compliance with the algorithm of the virtual appliance. The paper shows stages of making a computer simulator, such as modeling the system, translation of the model and analyzing the results of the development. The author describes concentrations of a substance in a sample simulated by the software and gives the corresponding formulas for calculations. The study presents a flowchart showing the process of operation of the computer program. The geometric design of application forms and functions of the system is based on this flowchart. A computer simulator created can be used in education at the stage of forming practical skills of students as well as raising the level of professionalism of clinical laboratories. The results of the study can be used in creating training simulators not only for biochemical analysis, but also for other areas of professional activities requiring the use of skills in working with high-tech equipment.

Keywords: model translation, modelling, laboratory diagnostics, Visual Basic, Stat Fax® 1904+, biochemical analyzer, training simulator, computer simulation, Microsoft Visual Studio, object model

Abstract: The article is devoted to methods of obtaining the necessary information for the functioning of the situational centers of various levels. The subject of research is the algorithm for obtain the relevant data and knowledge on the Internet. Under relevant data and knowledge the authors mean the information required to solve a problem or task. The object of the study the “IntellST” software, an information-analytical system for obtaining relevant data and knowledge on the Internet. Investigations take into account peculiarities of the Internet as the source of a huge volume of unstructured information. As the methods for the studying the authors used system analysis, information theory, algorithm theory, algebra, logic, set theory, comparative analysis, data mining techniques and methods of software development and database. The article presents general algorithm for finding data and knowledge on the Internet for the purposes of information support of situational centers. The authors present a universal functional diagram of a decision support system with the data and knowledge from the Internet. The paper shows the results of evaluation of the effectiveness of software “IntellST”. The authors concluded that it is possible to use “IntellST” to obtain information on the issue in the framework of the situational centers.

Keywords: making decisions, knowledge, data, DSS, IntellST, information, Internet, Situation Centre, problem, estimation of efficiency

Abstract: The authors study urgent problem of analysis and evaluation of workflow in an organization. The work proved the need for complex analysis of records management system in any organization. The authors formulate the basic objectives of the study and suggest using of an Automated Information System to analyze the workflow, which will allow gaining knowledge of the current situation in the field, analyze the state of workflow in terms of performance indicators based on documents as well as based on processes, taking into account correlation of indicators of records management system and parameters of efficiency of business processes and activities of the organization. The system proposed will help identifying errors in the documents and forming recommendations to address the shortcomings recorded. The study used methods of mathematical modeling, graph theory, probability theory, object-oriented programming. The authors developed a multi-level model of representation of knowledge about the state of workflow and business processes of the organization, identified the main components of automated information system and described its role in the operation of the system, considered in detail the algorithm of the user interaction with the automated information system. Use of the developed the system will allow to optimize state of the workflow, improve the efficiency of business processes and the functioning of the organization as a whole.

Keywords: workflow analysis, automated information system, model of knowledge representation, semantic network, structure of the AIS, database, knowledge base, logical inference subsystem, Bayesian method, operation algorithm

Abstract: Countering the hidden channels of information transmission is an important task in the organization of information security. One kind of passive physical resistance methods is detection of the steganographic impact on the investigated container. The widespread use of digital still images as stegano-containers is due to their large share in total data traffic. The task of passive counteraction (steganalysis) allowing identifying the digital image with the built-in information is actually a binary classification problem. At the core of the classifier lies statistical algorithm of quantitative steganalysis for determining the amount of modified pixels in the data container. The accuracy of the algorithm directly affects the quality classification and the practical effectiveness of passive physical resistance as a whole. By effective counteraction the article refers to the ratio of probabilities between true positive classification and the probability of a false positive classification. Currently there are many statistical algorithms for quantitative steganalysis. However, there are no studies on their comparative analysis which complicates the selection of an algorithm while solving the problem of counteraction to steganography channels of information leakage. The practical effectiveness of passive physical resistance to steganography channels by inserting the least significant bits of pixel digital image also remains an open question. The subject of the study is the effectiveness of the application of modern quantitative statistical algorithms steganalysis. Based on the results of the study the authors have formed graphics of trust regions, allowing to make a comparative assessment of the effectiveness of the passive counteraction in LSB-steganography. For the study the authors selected the following steganalysis algorithms: RS- analysis, Sample pair analysis, Difference image histogram, Triples analysis, Weighted stego-image. From the test of multiple images an image is selected. An evaluation of its capacity (defined by the maximum payload) is performed. In the experiments for this value authrs accepted the total number of pixels in the image. Steganographic effects modeled by changing the value of the least significant bit for a predetermined number of pixels (the payload). The modified image used as an input to a particular implementation of the algorithm steganalysis. The result of the algorithm is the number of changed pixels in the image. The experiments were carried out under the same conditions for all implementations of algorithms steganalysis. The main conclusions of the study is the fact that based on modern statistical steganalysis algorithms it is possible to organize an effective opposition to the passive channels with LSB steganography with embedding payload container more than 5%. Reducing the payload container of less than 5% dramatically reduces the effectiveness of the passive counteraction. A small 600x400 pixels image converted to steganography with payload of 1-2% is practically not detected by classifiers based on statistical quantitative algorithms steganalysis. Taking into account the possibility of pre-compression hidden data and matrix embedding, the considered modern algorithms for steganalysis need further improvement.

Keywords: the steganalysis algorithm, weighted stego-image, difference histogram analysis, simple pair analysis, LSB-based steganography, statistical quantative steganalysis, steganography, digital watermark, still images, statistical analysis algorithms

Abstract: The subject of the study is to optimize the management of flight speed and altitude of the aircraft, implementing a coordinated deflection of controls using special algorithmic software for flight control and navigation systems of automatic control. The authors solve the problem of creating a simulation software for controlling the regimes of horizontal flight of an unmanned aircraft, which allows to validate (to carry out a comprehensive study for a wide range of conditions, conditions and restrictions) control algorithms altitude and airspeed with the help of an integrated management system. The results are presented in relation to the adaptive control algorithm speed and altitude UAV aircraft type having versatility. The research methodology includes methods of mathematical modeling, management of complex systems, inverse problems of dynamics, system simulation, adaptive control, flight dynamics, aerodynamics. The main result of the study is a program complex of modeling management regimes of horizontal flight of an unmanned aircraft, which has been used to validated control algorithm level flight of an unmanned aircraft, providing an increase in the speed control loop speed and altitude, reducing fuel consumption, due to the desire of the current rate closer to the optimal value due to the withdrawal of the aircraft at the optimum altitude.

Keywords: speed control loop, autothrottle, longitudinal control channel, flight control and navigation system, unmanned aerial vehicle, flight control, flight control algorithm, flight simulation, the inverse problem of dynamics, modeling software package

Abstract: The subject of research is in the area of software development. An important task for this field is to accurately predict the timing of software development. However, the lack of standard set of tasks for which the execution time is predetermined or measured considerably complicates time management. Given these uncertainties, the author created a mathematical model of estimation of errors in predicting the timing of software development based on adaptive fuzzy system with an array of production rules, the antecedents and the consequent for which are represented by linguistic variables. The research methodology combines software engineering techniques and methods of fuzzy inference using fuzzy controllers based on production rules. The main result of the research is in building a model of estimation of errors in predicting the timing of software development based on fuzzy adaptive control system and the studies of its potential effectiveness. It is shown that the advantages of the developed model are: the possibility of obtaining error estimates based on expert judgment in the absence of statistical data; the possibility of adjusting the model during the project; the stability of the model to the one-time changes in the resulting noise values; the ability to transfer the model in a new project.

Keywords: productional logical conclusion, evaluation of programming time, software, fuzzy controller, development time program, software development, software engineering, programming costs, complexity of the software, software development project

Abstract: The subject of research is increasing the accuracy of determining the exact position of the optical axis of a movie (video) camera, required for its use in experimental studies and tests of complex systems. The calculation of the optical axis can be carried out at predetermined reference points (reference points). This approach is effective when using stationary optical measuring points. With regard to the use of movie (video) cameras the authors developed an original method for obtaining the angular coordinates using three reference points, which allows calculating the optical axis of a movie (video) camera on a priori given reference points. The research methodology combines the methods of computational mathematics, physical optics, analytical geometry, reliability theory, metrology and testing aircraft. The novelty of the research is in development of a method for calculating the angle of the camera only from the values of the angles between the axes and the projection of the optical axis on the coordinate plane. The calculation errors in the reference examples does not exceed three arc seconds, which satisfies the needs of many experimental studies and tests of complex systems.

Keywords: conversion of coordinates, spatial position of the camera, angular coordinates, camera angle, reference points, space coordinates, definition optical axis, optical axis of the cameras, binding to the optical axis, positioning your camcorder