493 papers found .

481. A Performance Evaluation of Some Function-Based Indices

ICIST 2019 Proceedings Vol.2, 230-235
Vještica Marko, Kordić Slavica, Čeliković Milan, Dimitrieski Vladimir, Luković Ivan, Vidaković Jovana
Abstract: When using Data Warehouse systems, companies need many reports that include time consuming queries on large amounts of data. They often use various functions for business analyses that could make queries more difficult to execute. Users are not always satisfied with the execution time of queries. There are different techniques to reduce execution time of queries. In this paper, we considered an influence of indexing techniques on the execution time of queries to gather reports faster. We created queries that contain functions and we measured their performance without using indices or using different function-based indices. Test cases were separated into two sections. First, we tested queries with more than one function nested one in the other in the WHERE clause. The second part of test cases presents queries with substring functions in the WHERE clause with different selectivity. They were also tested with different aggregation functions in the SELECT statement. We present results of an evaluation of query execution time using some function-based indices.

482. Analysis of the influence of ssd and magnetic discs on the performance of sql server

ICIST 2019 Proceedings Vol.2, 236-239
Atanasijević Jordan, Đorđević Borislav, Stanković Nevena
Abstract: The paper presents a comparative analysis of the impact of SSDs and magnetic disks on the performance of SQL Server under the Windows operating system. The work includes a comparison of performance of representatives of SSDs and SATA magnetic disks under Microsoft Windows Server 2016. The performance of the tested discs is measured using the ExpressProfiler-2.1 program. The obtained results show that using SSD disks achieves better performance in the processes of displaying, inputting, updating and deleting database records, which are achieved by the lower processing time of the processor, as well as the smaller number of reads and writes from the disk.

483. The Synchronisation of E-Learning Courses Using Agent Technology

ICIST 2019 Proceedings Vol.2, 250-253
Aleksić Aleksandra, Vidaković Milan, Savić Goran, Kaplar Aleksandar, Segedinac Milan
Abstract: The focus of this paper is on implementing a system for content synchronisation of e-learning courses in a distributed virtual educational environment. The system is implemented with the use of agent technology. The basic idea is bounding a software agent to each e-course. The agent manages its course content by exchanging data with other agents. An agent can integrate into its own course other course content that it obtained from other agents. An agent middleware named Siebog is used to implement synchronisation of data. Currently, the system works with Canvas LMS.

484. Architecture of web applications based on Angular Framework: A Case Study

ICIST 2019 Proceedings Vol.2, 254-259
Cincović Jelica, Delčev Sanja, Drašković Dražen
Abstract: Currently, Java Server Faces, Spring and Hibernate are taught on the course of Programming Internet Applications at the University of Belgrade - School of Electrical Engineering. Further, the Faculty Information System (FIS) is also realized on these web technologies. The primary focus of this research is to present the architecture of modern web applications based on the Angular Framework in the integration with other web technologies and their comparison with the existing FIS implementation. We have made comparative analysis of the Angular implementation in the frontend of the application with a backend developed in: 1) NodeJS framework; 2) .NET technology; 3) programming language Python. Based on selected analysis categories, the obtained results of this study will help software engineers to make better choice of appropriate technology and architecture, depending on the requirements of the application that they are developing. Index terms: Angular, single-page web applications, architecture of modern web apps

485. Analysis of e-government in EU

ICIST 2019 Proceedings Vol.2, 260-265
Paroški Milan, Matijević Marko
Abstract: . This paper describes the analysis carried out regarding the application of eGovernment in the EU. Some of the features that are examined are: functionality for eParticipation, mobile phone visibility, advantages and disadvantages of the site, usage statistics, public service statistics, events announced on the site, etc. A comparative analysis was made and the most interesting things were highlighted. The analysis was carried out for all EU countries, but the tables in the paper show data for only a part of the countries, due to space savings. 1.INTRODUCTION During the 1990s, the development of the Internet enabled the use of information and communication technologies in the development of an efficient public administration based on user-centric approach. E-Governance means the use of information and communication technologies as an instrument for achieving good governance with the aim of establishing easier, cheaper and more transparent interaction between government and citizens, the public and private sectors, as well as between public sector institutions. Good administration implies optimization of the functioning of public administration through the automation and implementation of information and communication technologies in order to improve services to citizens through more efficient administrative procedures, less waiting times, and saving money and time. . 2. ANALYSIS OF THE EGOVERNMENT PORTAL OF THE STATE OF THE EUROPEAN UNION Each country in the European Union has its eGovernment portal, which is available on the Internet. Portals are generally available in English in order to be understandable to the whole world. Portals are described in 3 tables. Is there ePrivacy, whether they are transparent on mobile devices, site statistics, and whether they are accessible to all users including blind and visually impaired. Tаble 1: (eParticipation, mobility visibility, site statistics) Country eParticipation Mobility visibility Site statistics Belgium https://www.belgium.be/en The site does not have any functionality for ePrivacy, it's all infomative Excellent visibility on your mobile phone. Excellent visibility on your mobile phone Global Position: 9,310 Rank in Belgium: 40 Bulgaria https://egov.bg/wps/portal/en The site does not have any functionality for ePrivacy Preference on your mobile phone is simple and transparent. Enter the top 20 countries with the fastest internet Sweden http://www.government.se/ The site does not have any functionality for ePrivacy Transparency on the mobile phone is good Global Position: 173,092 Rank in Sweden: 9,689 Cyprus http://www.cyprus.gov.cy The only functionality is a change to English The site is not customized for mobile devices Rank in Cyprus: 219 Percentage of visitors: 77% Czech Republic http://www.mvcr.cz i http://www.mzp.cz/ The site does not meet any of the requirements for ePrivacy The site is not transparent for mobile phones. Global rank: 84,958 Rank in Czech: 704 Denmark http://www.udbudsportalen.dk/ The site does not meet any of the requirements for ePrivacy Transparency on the mobile phone is good At the point of visit: 31,209 The user is on average kept: 3:20 min. Connected to 61 site Germany https://www.deutschland.de/en/topic/politics/global-issues-law/e-government The site has the functionality of viewing the site in 9 languages Excellent transparency, Playstore has an application for the site The most access to the site is about work, and then only around the household, the male sex visits more sites Greece http://www.e-gif.gov. gr/portal/page/portal/egif/ The site does not have any functionality for ePrivacy Bad visibility on mobile phones Global Position: 3,467407 Rank in Greece: 40,269 United Kingdom https://www.gov.uk/ The site does not have any functionality for ePrivacy The site has good visibility on the mobile phone Global Position: 564 Rank in UK: 26


ICIST 2019 Proceedings Vol.2, 266-269
Bogićević Žarko, Stefanović Nenad
Abstract: The main goal of this paper is to provide a model for creating virtual internships in order to improve youth employability and help with their transition from education to employment through internship exercises using ICT. The main suggested channel to conduct this is through an online platform that can provide the necessary information, materials and documents to create a virtual internship and monitor it step by step from its creation to the final evaluation. Students, their teachers, and mentors from companies during the internship can perform and monitor activities envisaged by the plan and the program of the internship. Apart from the segment dedicated to the tasks and activities, students communicate with their teachers and mentors through various communication channels within the platform, but also use the lessons and materials from the platform.

487. Tools for describing architecture of distributed systems based on microservices: overview and improvements

ICIST 2019 Proceedings Vol.1, 19-21
Suljkanović Alen, Filipović Milorad, Kaplar Sebastijan, Dejanović Igor
Abstract: Microservices represent a software development technique for developing an applications as a collection of small, loosely-coupled services. This approach of developing software applications is gaining more and more popularity because of its potential to deliver scalable and resilient solutions. However, one of the main technical challenges that appear when implementing microservices is lack of tools that would facilitate development, deployment, and monitoring of microservices. In this paper, we provide an overview of currently available tools for describing the architecture of microservice-based distributed systems. The tools analyzed in this paper allow users to create models of their application, that are afterwards transformed into runnable applications. Nevertheless, the application of these tools is rather limited to a certain domains because the generated applications are (mostly) Java-based and use synchronous communication style. In order to mitigate the shortcomings of the current tools in the domain, we came up with the feature set for a generic tool that will allow users to experiment with different programming languages, communication styles and deployment strategies, but also provide a mechanism for evaluating the architecture of the system

488. Linking Open Drug Data: The Arabic dataset

ICIST 2019 Proceedings Vol.1, 22-26
Lakshen Guma, Janev Valentina, Vraneš Sanja
Abstract: Linked Open Data illustrates the concept that provides an optimum solution for information and dissemination of data, through the representation of the data in an open machine readable format and to interlink it from diverse repositories to enable diverse usage scenarios for both humans and machines. The pharmaceutical/drug industry was among the first that validated the applicability of the approach for interlinking and publishing open linked data. Yet, open issues arose clearly when trying to apply the approach to datasets coded in languages other than English, for instance, in Arabic languages. Author’s objective is to examine in detail the requirements specification process for building Linked Data application taking into consideration the possibility of reusing recently published datasets and tools. Main conclusions derived from this study are that making drug datasets accessible and publish it in an open manner in linkable format adds great value by integration to other notable datasets. Author’s main contribution is the enhancement of Arabic knowledge graph based on drug data from selected Arabic countries and the novel methodology for building Linked Data applications.

489. Mobile application for energy management in smart buildings

ICIST 2019 Proceedings Vol.2, 240-243
Berbakov Lazar, Batić Marko, Tomašević Nikola
Abstract: This paper discusses Smart Energy Manager (SEM) mobile application for energy management in smart buildings which is developed as a result of the ongoing H2020 projects InBetween and Sofia. SEM app belongs to the visualization layer of the InBetween platform serving as an interface from the system towards the end users with the aim to help them to identify their energy wastes, teach them how to conserve energy and steer their behavior to be more energy efficient. The application is based on Android OS, and it relies on a backend built with CakePHP framework which is used to integrate the application with the rest of the InBetween platform, its main data storage and advanced energy analytic services. Finally, we present the main functionalities of the app along with the data scheme which is used to store users and deployed equipment related data

490. “Ethnic” Music in the Balkans: Identity, Similarity and Classification Norms

ICIST 2019 Proceedings Vol.2, 244-249
Politis Dionysios, Tzimas R, Aleksić Veljko
Abstract: In extended regions, where several “ethnic” groups have been living together for many centuries, apart from systematic instruction, given at schools or universities, not always fixed boundaries develop for ideas, customs and social behavior. This is also true for music, and generally speaking for arts, whose intellectual achievements transcend human societies and cultures. In networked communities, the information superhighway brings together musical activity reflecting spheres of influence in the synchrony or diachrony of their ongoing social development. This research examines the features involved in setting up Metrics and Norms for Identity and Similarity, along with Classification methods for South-Eastern European and Eastern Mediterranean tunes as they have been traced in a survey in the Balkans.

491. A State-of-the-Art Review on Big Data Technologies

ICIST 2019 Proceedings Vol.1, 130-134
Jelić Marko, Pujić Dea, Paunović Dejan, Jabeen Hajira
Abstract: As the level of implementation and integration of digital systems in every part of daily life constantly increases, higher and higher volumes of data are being generated at unprecedented rates without any indication of slowing down at any point in the near future. The contemporary IT infrastructure has started to struggle with the storage, processing, analysis and knowledge extraction capacities required for maintaining such large amounts of data, therefore various novel solutions have been developed in order to deal with this new phenomenon, named Big data. With the number of related solutions ever growing, a requirement arose for a systematization of methods and technologies related to this domain. Therefore, this paper aims to provide an overview of the current state-of-the-art solutions related to Big data.

492. A Trustworthiness-Based Application to Handle Private Data In a FIWARE-Based System

ICIST 2019 Proceedings Vol.1, 204-208
Giao Joao, Rajaonah Bako, Marcelino-Jesus Elsa, Sarraipa Joao
Abstract: The development of applications to be used on open networks are insecure and provide opportunities for viruses and easy access to confidential information. However, the creation of a trustworthiness layer based solution to handle private data in a FIWARE based system is going to generate an easy to use mechanism to be integrated by applications that have personal information. Creating such secure applications will allow a customized secure infrastructure to validate the user’s permission to access the personal information and guarantee the system’s integrity

493. Augmented feedback system for coaching support in volleyball

ICIST 2019 Proceedings Vol.2, 270-273
Umek Anton, Kos Anton
Abstract: We became interested in the demands of the sensor systems and feedback applications in volleyball training. Besides the professional optical tracking systems, we propose a much less expensive sensor system, suitable for basic temporal motion analysis in volleyball. The main goal of our research is finding a simple, but sufficient sensor setup that would provide enough information about the key temporal indicators and parameters in different basic volleyball skills. The paper also presents the first field test results. A motion specific custom applications can provide a very useful supplemental feedback information to the coach in real-time and for later analysis.


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