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Event program

Tuesday, 5/23/2017 3:00 PM - 6:45 PM, Camelia 1, Grand hotel Adriatic, Opatija 3:00 PM - 3:15 PM Opening Chair: Tihana Galinac Grbac  3:15 PM - 3:45 PM Invited Lecture Chair: Tihana Galinac Grbac  K. Drira (LAAS-CNRS and University de Toulouse, France) Multiscale Modelling: a Perspective for Mastering Architectural Design Complexity in Internet of Thing Platforms and Smart Applications  3:45 PM - 5:15 PM Modeling in Computing Chair: Goran Mauša  1. J. Costa (Institut Jozef Stefan, Ljubljana, Slovenia) Topological Data Analysis and Applications  Topological data analysis is interested in problems relating to nonlinear systems, large scale data and development of more accurate models, that contribute to a high level research. In the study of time-series data we can identify problems that focus aspects of that nature, with applications to digital disease detection, gene expression, viral evolution, etc. In particular, it describes the qualitative aspects of the data, focusing the topological features with longest lifetimes. To encode the latter, it uses novel mathematical methods that can provide diagrams which are a clear and practical tool that allow us the detection of outliers and to capture the dynamics of the system. In this paper we review this methodology and discuss several applications that can lead to new perspectives to modelling and simulation in system behaviour. 2. D. Brscic (University of Rijeka, Rijeka, Croatia), F. Zanlungo, T. Kanda (ATR, Kyoto, Japan) Modelling of Pedestrian Groups and Application to Group Recognition  In analysing the movement and interaction of pedestrians it is very important to take into account the social groups they form. In this paper we revise the work we have done on the modelling of the spatial formations of socially interacting groups of pedestrians. We than describe the application of the obtained statistical models to the automatic detection of pedestrians who are in a group. The results show that a high detection accuracy can be achieved. 3. N. Rakić, G. Rakić, N. Sukur, Z. Budimac (Univeristy of Novi Sad, Faculty of Sciences, Novi Sad, Serbia) eCST to Source Code Generation - an Idea and Perspectives  eCST (enriched Concrete Syntax Tree) is introduced as a fundament of SSQSA platform for consistent static quality analysis across the input languages. It is based on concept of enrichment of the tree representing complete concrete syntax of the input program by universal nodes. Universal nodes are based on the idea of imaginary nodes in abstract syntax tree, but unified so that one single node is used for all languages where it is applicable. In this paper, we describe translation of these trees back to source code. At this moment, this is only translation to the original language in which code is written, but with the perspective to be extended to the level of cross-language code translation. However, even translation of eCST to code written in the original language can have a wide specter of applications such is in (semi-)automated code refactoring and transformations. 4. B. Šumak, M. Špindler, M. Pušnik (Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia) Design and Development of Contactless Interaction with Computers Based on the Emotiv EPOC+ Device  Devices and methods for interaction with a computer do not change very often. However, with technology advancements, solutions for new ways of humancomputer interaction are possible. Especially for physically disabled users, solutions for contactless interaction with a device promise new possibilities for independent computer use and management. In this study a solution for a contactless interaction with a computer was proposed based on a brain-computer interface (BCI) device Emotiv EPOC+. The EPOC+ device is able to detect brain signals, facial expressions or levels of engagement (e.g. frustration, mediation, etc.), eye movement and head position through the built-in gyroscope sensors. The contactless interaction solution proposed in this study was based on (1) mapping facial expressions into user interface commands, (2) headmovement detection for controlling the mouse cursor, and (3) a virtual keyboard, which was developed to enable text input. The proposed solution was tested in a quasiexperimental setting, where non-disabled users had to complete several computer tasks. After completing the tasks, perceived usefulness and perceived ease of use of the proposed solution were assessed. At the end, limitations and future work are discussed. 5. M. Pušnik, D. Ivanovski, B. Šumak (University of Maribor, Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia) Patterns for Improving Mobile User Experience  Mobile telephone sales are achieving a constant growth on the global level as well as locally in Slovenia, where stores have a record of approximately fourfold increase of mobile device sales in the last 6 years. Accordingly, the development of mobile applications and services has also escalated, however, not every mobile application received the anticipated acceptance rate. Assumed reason for disregarded applications is low user experience while using mobile applications. The paper focuses on the concept of a mobile user experience definition and enhancement, addressing the questions (1) what is mobile user experience, (2) how to measure the mobile user experience and (3) how to improve the mobile user experience based on mobile experience patterns. Results of an experiment are included, recording the behavioral characteristics of 27 users using a mobile application for checking accounts, evaluating its level of intuition, ease of use, usefulness, ease to remember and flexibility to user’s needs and requirements. 6. V. Giedrimas, L. Vaitkevičius, A. Vaitkevičienė (Siauliai University, Siauliai, Lithuania) Drawing Process Recording Tool for Eye-hand Coordination Modelling  The process of drawing is one of the main activities during childhood. The drawing dynamics, drawing techniques are on the focus of education science. It is known that the result of the drawing process depends on eye-hand coordination. Testing of the psycho-motoric reactions allows classifying motion and positioning problems. Psychomotor reaction data, compared with the characteristics of the drawing such as line thickness and plasticity, allows to clarify the stages of drawing process as well as to establish correlations between the arm motion, plasticity of the drawing and the eye characteristics. In order to perform such research, to make models of the Eye-hand Coordination special tool for drawing process date acquisition, recording and analysis is needed. In this paper one possible implementation of such tool is presented as well as the formal foundations and premises on which the tool is operating. The tool capa 5:15 PM - 5:30 PM Break  5:30 PM - 6:45 PM Modeling in Other Applications Chair: Joao Pita Costa   1. A. Balota (Faculty of Information Technology, Podgorica, Montenegro) Model of Calculating Indicators of Power System Reliability  Reliability of the power system is an important component of electric power quality. Beside this, the reliability analyses are inevitable in planning development of power systems. For a more complete analysis of reliable operation of power systems, a comprehensive and detailed knowledge is needed of the way in which they operate, their performance criteria, the possible ways and consequences of cancellation, business policies, impact of the surrounding, etc. Therefore, for these very diverse and complex analyses, it is necessary to have a general mathematical model, which can be applied to a wide range of different studies related to the assessment of reliable operation of the observed systems. The possible ways of calculating the states of complex systems are presented in this paper, as well as some results of the obtained coefficients of complex power system reliability, which have been reached by applying the developed mathematical model and software program based on it. Calculations were performed on the power system of Montenegro. 2. A. Župan (Croatian Transmission System Operator Ltd., Zagreb, Croatia), B. Filipović-Grčić , I. Uglešić (University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, Croatia) Modelling of Variable Shunt Reactor in Transmission Power System for Simulation of Switching Transients  Shunt reactors are used in power transmission system for consuming an excessive reactive power generated by overhead lines under low-load conditions. These conditions can increase system voltages above the maximum operating voltage due to the Ferranti effect. By connecting shunt reactors to transmission system, voltages can be maintained within the prescribed limits, which is important for normal operation of high voltage equipment. Fixed shunt reactors are quite often switched on and off, following the load situation in the system. Instead of having two or more shunt reactors with fixed power ratings, a single variable shunt reactor (VSR) could be used for compensation of reactive power. This paper describes a model of three-phase variable shunt reactor (VSR) for simulation of switching transients in EMTP-RV software. Inrush currents caused by VSR energization and overvoltages caused by deenergization are analysed. For this purpose, a model of VSR, substation equipment and electric arc in SF6 circuit breaker was developed in EMTP-RV software. Circuit breaker reignition during deenergization was simulated, which represents the most severe case of overvoltage with steep wave front that stresses VSR insulation system, especially the insulation of the first few winding turns. 3. H. Šiljak (International Burch University, Ilidža/Sarajevo, Bosnia and Herzegovina), J. Hivziefendić (International Burch University, Sarajevo, Bosnia and Herzegovina), J. Kevrić (International Burch University, Ilidža/Sarajevo, Bosnia and Herzegovina) An Extended Model of a Level and Flow Control System  Abstract—Festo Compact Workstation is a well known didactic tool in process control. This paper aims at providing an improved transfer function model of this system’s level and flow control loops. This higher order model is compared to existing first order system approximations of the level control loop in various input-output scenarios to verify its applicability and superiority. Results are obtained using MATLAB System Identification Toolbox after data acquisition in LabVIEW. MATLAB Simulink is used for cascade PI and single loop PI experiments to show the improvement cascade control on the new model brings. Together with the practical value the results have, the procedure conducted here can serve as a primer and a tutorial for system identification class using this or similar apparatus. 4. M. Franulović, K. Marković, S. Piličić (Faculty of Engineering, Rijeka, Croatia) Procedure for Modelling of Soft Tissues Behavior  The procedural steps for the efficient modelling and simulation of material behavior of human cervical spine ligaments have been presented in the paper. They are based on the mechanical principles incorporated in the material model, suitable for the description of soft tissues behavior. The material parameters set which have to be identified for the presented model has been additionally expanded here to make possible better calibration of the model by the application of genetic algorithm. The genetic algorithm has been recognized in this investigation as an efficient tool to overlap the bridge among the non-linearity of material behavior and material parameters of the chosen model and thus make possible material behavior modelling which follows materials response as accurately as possible. The basic process steps have been developed here for the efficient optimization of soft tissues behavior modelling. 5. M. Savić, M. Ivanovic, Z. Putnik (University of Novi Sad, Novi Sad, Serbia), K. Tütüncü (Selcuk University, Konya, Turkey), Z. Budimac (University of Novi Sad, Novi Sad, Serbia), S. Smrikarova, A. Smrikarov (University of Ruse, Ruse, Bulgaria) Analysis of ERASMUS Staff and Student Mobility Network within a Big European Project  The academic mobility is one of key factors that enable the globalization of research and education. In this paper we study the network of ERASMUS staff and student exchange agreements between academic institutions involved in FETCH – a big European project oriented towards future education and training in computer science. The structure of the network was investigated relying on standard metrics and techniques of social network analysis. Obtained results indicate that the network is in a mature phase of the development in which none of the institutions has a critical role to the overall connectedness of the network. Additionally, the network has a clear coreperiphery structure with an active core and mostly inactive periphery.

Tihana Galinac Grbac (Croatia)

The discount doesn't apply to PhD students.

Tihana Galinac Grbac
University of Rijeka
Faculty of Engineering
Department of Computer Engineering
Vukovarska 58
HR-51000 Rijeka, Croatia

Phone: +385 51 651 596
GSM: +385 99 3820 750
E-mail: tihana.galinac@riteh.hr

The best papers will get a special award.
Accepted papers will be published in the ISBN registered conference proceedings. Papers written in English and presented at the Conference will be submitted for posting to IEEE Xplore.
There is a possibility that the selected scientific papers with some further modification and refinement are being published in the Journal of Computing and Information Technology (CIT).

Opatija, with its 170 years long tourist tradition, is the leading seaside resort of the Eastern Adriatic and one of the most famous tourist destinations on the Mediterranean. With its aristocratic architecture and style Opatija has been attracting renowned artists, politicians, kings, scientists, sportsmen as well as business people, bankers, managers for more than 170 years.

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