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Event program

Thursday, 5/25/2017 9:00 AM - 12:30 PM, Galija, Hotel Admiral, Opatija 9:00-9:10  Introduction  9:10-12:10  Papers  1. G. Blažić, P. Poščić, D. Jakšić (Odjel za informatiku - Sveučilište u Rijeci, Rijeka, Croatia) Data Warehouse Architecture Classification  The purpose of this work is to give an overlook and comparison of the best known data warehouse architectures. Single-layer, two-layer, and three-layer architectures are structure-oriented ones that are depending on the number of layers used by the architecture. In independent data marts architecture, bus, hub-and-spoke, centralized and distributed architectures, the main layers are differently combined. Listed data warehouse architectures are compared based on organizational structures, with its similarities and differences. The second comparison gives a look into information quality (consistency, completeness, accuracy) and system quality (integration, flexibility, scalability). Bus, hub-and-spoke and centralized data warehouse architectures got the highest scores in information and system quality assessment. 2. R. Poljak, P. Poščić, D. Jakšić (Odjel za informatiku - Sveučilište u Rijeci, Rijeka, Croatia) Comparative Analysis of the Selected Relational Database Management Systems  The database management system is a software that enables easier work with databases i.e. to define database structure, retrieve stored data, enter data into the database and process the previously stored data in the database. In this article we have compared 3 relational database management systems (RDBMS) - Oracle 11g, MySQL and PostgreSQL. They are compared according to the simple criteria that we defined, such as the comparison of basic data, syntax, data types and speed performance. The main contribution of the article is a comparison of 3 different RDBMSs by our own score criteria. 3. L. Cvetković, B. Milašinović, K. Fertalj (Faculty of Electrical Engineering and Computing, Zagreb, Croatia) A Tool for Simplifying Automatic Categorization of Scientific Paper Using Watson API  More than a decade many scientific papers have been dealing with automatic categorization of documents. Until recently there were no wide spread tools or libraries that could be integrated in a custom application. Recent cloud solutions for cognitive computing eased such integration, but integration still requires a lot of work. An idea of extendible library for simplifying document parsing and categorization using IBM Watson API is developed and presented in this paper. As a proof of concept nearly one hundred of scientific papers in a scientific journal were parsed and analysed using Watson API to detect key topics and concepts of each paper which were then compared with keywords provided by the author. 4. V. Kovács, V. Póser (Óbuda University, Budapest, Hungary) The Role of Redundancy and Sexual Reproduction in the Conservation of the Genetic Information Tested on a Cellular Automaton  Pixel evolution is a framework created to study various evolutionary mechanisms. It consists of a cellular automaton with programmable and highly mutable cells and a customizable dynamic environment. We modeled the basic aspects of sexual reproduction to test our hypothesis about its role in information integrity and in the curse of evolution in general. Our findings also suggest that if there is a reasonable cost of reproduction, a selective pressure emerges in favor if short genome sizes. We examine the implications of our findings in a bottom-up evolutionary model. 5. D. Polančec, I. Mekterović (Faculty of Electrical Engineering and Computing, University of Zagreb, Zagreb, Croatia) Developing MOBA Games Using the Unity Game Engine  MOBA (Multiplayer Online Battle Arena) games are currently one of the most popular online video game genres. This paper discusses implementation of a typical MOBA game prototype for Windows platform in a popular game engine Unity 5. The focus is put on using the built-in Unity components in a MOBA setting, developing additional behaviours using Unity's Scripting API for C# and integrating third party components such as the networking engine, 3D models, and particle systems created for use with Unity and available through the Unity Asset Store. A brief overview of useful programming design patterns as well as design patterns already used in Unity is given. Various game state synchronization mechanisms available in the chosen networking engine, Photon Unity Networking, and their usage when synchronizing different types of game information over multiple clients are also discussed. The implemented game retains most of the main features of the modern MOBA games such as heroes with different play styles, skills, team versus team competition, resource collection and consumption, varied maps and defensive structures. The paper concludes with comments on Unity 5 as a MOBA game development environment and execution engine. 6. T. Vilček, T. Jakopec (Filozofski fakultet u Osijeku, Odsjek za informacijske znanosti, Osijek, Croatia) Comparative Analysis of Tools for Development of Native and Hybrid Mobile Applications  One of the main reasons for wide acceptance of smartphones are mobile applications that offer a wide variety of possibilities. This paper deals with types of mobile applications: hybrid and native, as well as tools that enable their development. For the purposes of this paper, a total of eight simple, identical applications were made for Android, iOS and Windows Phone. Native applications for Android, iOS and Windows Phone were made in integrated development environment, or so called IDEs: Android Studio, Xcode and Visual Studio. Hybrid applications for Android and iOS were made in Ionic, PhoneGap and NativeScript framework, ie. working environment. The paper compares tools used for development through following criteria: supported operating system, supported mobile platforms, programming languages, official documents and community of programmers, installation and development. Goal is to research the advantages and disadvantages of the tools used for development of native and hybrid mobile applications, and which applications are most profitable. Out of all integrated development environments analyzed, Android Studio has the least disadvantages, and out of all working environments or frameworks, the most prominent was PhoneGap. Regarding profit, nowadays it makes most sense to develop hybrid application using JavaScript programming language due to reduction of costs and other possibilities they offer nowadays. 7. L. Bach, B. Mihaljević, A. Radovan (RIT Croatia, Zagreb, Croatia) Exploring HTTP/2 Advantages and Performance Analysis using Java 9  As websites have become bulkier and serve more larger files to end users, it has become harder for the HTTP/1.1 protocol to provide adequately short page load times. The HTTP protocol, in its previous versions, is a generic stateless application protocol most often used for distributed, collaborative, hypermedia information systems. The newest version, HTTP/2, introduced an updated protocol feature set based on Google’s SPDY/2 protocol, aimed at improving the speed at which modern web resources load, reducing network congestion and additionally enforcing security standards. With header compression, new server "push" responses, and fully multiplexed connections, HTTP/2 solves the major issues previous versions were unable to overcome. This paper presents a performance analysis results comparing both protocol versions in the upcoming release of Java 9 programming language as well as describes key differences in development between versions. Analysis was run on the open source Jetty web server and benchmark code was compiled using JDK 9 Early Access Build 153. This paper shows benchmark results using different scenarios and typical usage performance gains. It outlines the major improvements and recommendations switching to the newer protocol version provides, specifically in general use object-oriented programming languages such as the new version of Java language. 8. Z. Gračak, L. Brkić (Fakultet elektrotehnike i računarstva, Zagreb, Croatia) Software Supporting International Student Exchange Program in Higher Education  International student exchange programs allow students to study in various countries and experience challenges in the new academic environment. International student exchange processes are complex and accompanied with extensive administrative tasks involving many higher education institutions (HEI). These administrative processes can be facilitated with the help of an appropriate software. This paper presents a software designed for managing data required for various processes in student exchange programme. The software, allows the user to manage data about HEI, bilateral agreements signed between institutions in European Higher Education Area (EHEA), applications of the outgoing students for an annual tender and the outcome of the competition. It supports automatic procedures for student ranking considering their choices, achievements and propositions of the tender. The main outcome of the software is the ranking list of the students with associated outgoing HEI complied with the quotas agreed in bilateral agreements and student’s preferences. 12:10-12:20  Conclusion  Thursday, 5/25/2017 3:00 PM - 6:30 PM, Galija, Hotel Admiral, Opatija 15:00-15:10  Introdaction  15:10-18:10  Papers   1. A. Lukač, M. Subašić (Faculty of Electrical Engineering and Computing, Zagreb, Croatia) Blood Vessel Segmentation Using Multiscale Hessian and Tensor Voting  We present a new method for segmentation of retinal blood vessels in color fundus images. The method utilizes Hessian eigenvalues and eigenvectors calculated for each pixel to obtain a measure of vesselness. The measure is similar to the Frangi vesselness but we use a different combination of eigenvalues, while keeping entire Hessians for further processing. Hessians are calculated at different scales, where each scale targets a certain width range of blood vessels. We perform a scale selection procedure to pick the most appropriate scale for each pixel. Hessians from the selected scales are treated as tensors and used as input for tensor voting procedure to further reduce the influence of noise and highlight the blood vessels. Green channel of color retinal photographs is used as input to the method due to better blood vessel contrast. We also present promising experimental results obtained on a test database with manually segmented retinal blood vessels of healthy patients only. 2. M. Pivac, A. Granić (Prirodoslovno-matematički fakultet, Split, Croatia) Storytelling in Web Design: A Case Study  Developing technologies and meeting the demands and needs of a wide range of different users had rather important influence on design of user interfaces of web applications. In such a dynamic context, storytelling in web interfaces design represents a new approach which aims to realize a more attractive interfaces that also ensure and encourage the participation of the users themselves. This paper examines the pros and cons of such an approach as well as its effectiveness and impact on the development of interfaces designed for a good user experience. Developed theoretical aspects are applied on design and implementation of selected web application, whose usability as well as user experience was tested with future users by applying relevant methodology. 3. M. Manojlovic, L. Dajak (Filozofski fakultet, Rijeka, Croatia), M. Brkic Bakaric (Odjel za informatiku, Rijeka, Croatia) Idioms in State-of-the-Art Croatian-English and English-Croatian SMT Systems  Idioms are well known for posing problems to non-native speakers, let alone machines. A failure to identify idioms often leads to unnatural, even hilarious outputs. This paper investigates the treatment of idioms in state-of-the art SMT systems involving English and Croatian. First we introduce the concept of idioms. Then we construct three short stories abundant with idioms per each language, and translate them into the other language by two state-of-the-art SMT systems. Next we manually inspect the outputs and present results. For the purpose of conducting analysis, we devise an error taxonomy for handling idioms. 4. D. Gečević, T. Bjažić (Tehničko veleučilište u Zagrebu, Zagreb, Croatia) Contactless Control of Sanitary Water Flow and Temperature  An innovative embedded computer system for contactless control of sanitary water flow and temperature is described in this paper. The innovative component of this embedded system is in its ability to control the flow and temperature of sanitary water, without the need for physical contact with a tap. In this way, the transfer of bacteria from the surface of the tap to a user is avoided, which significantly contributes to the preservation of health and cleanliness, i.e. hygiene. A hardware and software components required for the functioning of this embedded computer system are described in this paper. A design and production of printed circuit boards (PCBs), for control of servo valves using an analog infrared proximity sensors, a digital infrared proximity sensor and signal LEDs, are included as the hardware part of the paper. The software part is consisted of description of a class for linearization characteristics of the analog infrared proximity sensor, and description of a class for noise filtering, as essential software components of the program, which ensure comfortable use of the system for the end user. 5. M. Gavran (Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia), M. Fruk, G. Vujisić (Zagreb University of Applied Sciences, Zagreb, Croatia) PI Controller for DC Motor Speed Realized with Arduino and Simulink  In this paper, the technical system of speed controlled DC motor is described. The speed of DC motor is controlled using Arduino programming platform and MATLAB’s Simulink coder. This paper contains introduction in using an Arduino board and Simulink PI controller in closed loop system. It will be described how to program Arduino with Simulink coder and at the end test results of PI controller for DC motor speed will be given. 6. M. Balug (Faculty of Electrical Engineering and Computer Science, Maribor, Slovenia), T. Špoljarić, G. Vujisić (Zagreb University of Applied Sciences, Zagreb, Croatia) Laboratory Model of the Elevator Controlled by ARDUINO Platform  This paper presents methods for regulating the elevator's cabin speed and position for purposes of traffic control. It contains four stations. On every station there are two position sensors and cabin call button. Cabin speed regulation is realized with microcontroller, incremental encoder and chopper, where chopper controls DC motor speed. A simple traffic control is written for ARDUINO platform. 7. D. Mežnarić, K. Krajček Nikolić, D. Franjković (Faculty of Transport and Traffic Sciences, Zagreb, Croatia) System for Acquisition and Processing of Pressure Data around Body in Airflow  The paper deals with the system and methods for determination of the pressure distribution around aerodynamically shaped body immersed in airflow and further calculations of aerodynamic characteristics. Measurements are conducted in the subsonic closed-loop wind tunnel AT-1, in Aerodynamics Laboratory of Department of Aeronautics at Faculty of Transport and Traffic Sciences. Pressure distribution around airfoil NACA 2421 is sensed by the system for acquisition of pressure data Intelligent Pressure Scanner 9016, produced by the Pressure Systems company. Data are digitalized and transferred to the computer through the ethernet link. Data are processed by NUSS and LabView software. Measurement results are displayed and compared to those obtained from piezometric harp. Results of experiments are commented and recommendations for further research are given. 8. S. Kovačević, D. Maršić, G. Malčić (Tehničko veleučilište u Zagrebu, Zagreb, Croatia) SCADA sustavi četvrte generacije na primjeru rješenja MyScada  U novoj eri industrijskih računalnih sustava ulazi se u tzv. četvrtu generaciju sustava nadzora, upravljanja i prikupljanja podataka (eng. Supervisory Control And Data Acquisition, SCADA) koji se baziraju na Cloud i Internet of Things tehnologijama. Odlikuju ih mnoge karakteristike koje pružaju prednost nad starijim generacijama SCADA sustava. Najveći napredak postignut je na komunikacijskoj razini ujedinjavajući proizvođače uređaja industrijske namjene kako bi mogli raditi u istom okruženju. Na taj način podupire se razvoj cyber-fizičkih sustava koji čine samu osnovu koncepta četvrte industrijske revolucije pod nazivom Industry 4.0. U okviru ovog rada prikazano je rješenje MyScada koje posjeduje sve karakteristike četvrte generacije SCADA sustava. 9. K. Krhač (Faculty of Electrical Engineering and Computing, Zagreb, Croatia) Osnove modeliranja bežičnog komunikacijskog kanala za tjelesne mreže  IEEE 802.15.6 je standard za bežične komunikacije u blizini, na ili unutar ljudskog tijela koje prema fizičkom sloju mogu biti uskopojasne, širokopojasne ili HBC. Komunikaciju u okolici ili unutar ljudskog tijela karakteriziraju značajni gubitci i sjenjenje što predstavlja problem kod modeliranja komunikacijskog kanala. Kako bi model komunikacijskog kanala bio prihvatljiv, mora vrijediti za mnogobrojne scenarije i primjene. Statistički modeli prvog i drugog reda koriste se za točno modeliranje bežičnih BAN komunikacijskih sustava. Širokopojasne BAN komunikacijske kanale najtočnije opisuje log-normalna razdioba, dok je za opis uskopojasnih BAN komunikacijskih kanala najtočnija log-normalna ili gama razdioba. 18:10-18:20  Conclusion

Filip Hormot (Croatia), Dubravko Sabolić (Croatia), Matej Janjić (Croatia)

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Filip Hormot
KSET
Unska 3
HR-10000 Zagreb, Croatia

GSM: +385 99 261 0222
E-mail: filip.hormot@fer.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).

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