737 papers found .

141. A strategic approach to providing cloud services for research and education community

ICIST 2015 Proceedings Part II, 358-363
Gajin Slavko, Hackett Robert, Galeazzi Fulvio, Pagaime João
Abstract: The emergence of cloud services and technologies is providing the education and research community with many new and innovative ways to help institutions meet their user’s requirements. Cloud services bring many opportunities and benefits but are complex and present many challenges and risks. A well-defined strategy is essential to define the right approach to navigate through the many options and decisions required to provide successful cloud services. In this paper we do not propose a strategy for adopting cloud services for research and education institutions. Instead, we propose a methodology to guideline policy makers in research and education institutions to define an effective strategy to help ensure success in adopting cloud services.

142. A Contribution to the Development of an Information System in the Function of Improving Decision-Making in Business

ICIST 2015 Proceedings Part II, 364-369
Nešić Zoran, Denić Nebojša, Radojičić Miroslav, Vesić Vasović Jasmina
Abstract: In this paper, the most important elements of software development are presented, with the aim of improving decision making in business. The considered example has practically been implemented in a company engaged in the transportation and storage of petroleum products. The results of the presented software indicate a significant improvement in the collection of large amounts of data and available information. The software support has essentially been focused on the improvement of data visualization for different aspects of the business decisionmaking process and the business cost reduction. The paper presents the methodological aspects of software development in the key segments. The paper is illustrated with different types of reports with the aim to support managers in business decision making in the specified segment.


ICIST 2015 Proceedings Part II, 370-374
Debeljački Ružica, Tumbas Pere, Šereš Laslo
Abstract: Business failure of the organization may be caused by its inability to adapt its business operations to the changes in the market requirements. This leads to a conclusion that today’s turbulent business conditions impose the need to increase the level of agility of the organization. Agility is defined as the ability of organization to adapt to different business conditions. Thus, a solution should be looked for in the IT systems such as Enterprise Resource Planning (ERP) and Competitive Intelligence (CI). The reason why exactly these two systems have been chosen is their focus of analysis. ERP systems are specialized for the analysis of organization’s business operations, and CI systems have been developed in order to analyze the environment. Therefore, the organization can analyze all business operations by using these two systems. The aim of this paper was to determine whether a synergy of these two systems can contribute to higher level of organization’s agility. This paper shows systematic analysis of literature which aim was to determine the contribution of the ERP and CI systems to the agility of the organization and to consider the possibilities of their synergy when used parallelly in today’s conditions of successful business operations. This was achieved by considering 35 chosen (selected) scientific papers. The results of analysis showed that the ERP systems, according to most of the authors, do not contribute to the agility of the organization, and the CI systems are the ones which are the most significant component of agility. This synergy can exert influence on the modification of existing business policy or establishment of a new one which would be based both on the analysis of previous business operations and the analysis of business environment, and as a result the organization would have higher level of agility. Based on the obtained results, this paper offers theoretical basis for further research, particularly empirical research, which aim would be to determine the degree of synergy that the ERP and CI systems have in some organizations and their correlations with accomplished (achieved) level of agility of those organizations.

144. Advantages and Drawbacks of Sloodle application for creating high-quality teaching materials with demanding graphics

ICIST 2015 Proceedings Part II, 375-379
Radović Maja, Milošević Danijela, Mitrović Anđelija, Blagojević Marija
Abstract: Due to is potentials, Sloodle virtual environment has been used to create medical course for training medical staff in the field of orthopedic. As opposed to conventional practice, where 3D models of vertebrae and spine are difficult to obtain and expensive for the preparation, Sloodle medical course allows participants access to high quality 3D models in virtual world at any time. The paper presents main features of course design and implementation. Besides, the internal evaluation is performed aiming to analyze the possibilities offered by presented environment in order to determine whether tutors can use Sloodle to obtain highquality teaching materials with a reasonable investment of time and knowledge. The evaluation included six categories of questions and assessed the Sloodle tools management, upgrading, collaboration, costs and simplicity of adding 3D models, ease of programming, etc. The advantages and drawbacks are discussed in detail.

145. Massive Open Online Courses: edX vs Moodle MOOC

ICIST 2015 Proceedings Part II, 380-384
Blagojević Marija, Milošević Danijela
Abstract: This research provides the overview of general possibilities of two massive open online courses edX and Moodle MOOC. The presented results show the comparative analysis of edX and MOOC pointing out different categories. The short discussion of performed analyses is also presented. The future work will be focused on the analysis of advanced features which both environments provide.

146. Adaptation of Online Courses for Students with Different Educational Backgrounds and Predispositions for Learning

ICIST 2015 Proceedings Part II, 385-390
Frtunić Gligorijević Milena, Stoimenov Leonid
Abstract: In this paper a proposal for adaptation of course Algorithms and Programming will be presented. This course is in first year of academic studies at faculty of Electronic Engineering in Niš, University of Niš. In the past decade different approaches for adaptation in e-learning systems have been proposed. Also, categorization of students can be done in several ways and adaptation and personalization can be implemented for groups of students and for individual students. All this provides variety of possibilities for realization and it is important to choose the best approach for specific case. Within this paper, we will discuss and present the best solution for adaptation of the course which is attended by students with different educational backgrounds and predispositions for programming and algorithm creation, in order to facilitate the learning of the course material.

147. Multi linked lists: an object-oriented approach

ICIST 2015 Proceedings Part II, 391-396
Stojisavljević Đorđe, Brtka Eleonora, Brtka Vladimir, Berković Ivana
Abstract: The paper deals with the approach to multi linked lists while teaching. Object oriented paradigm is used, so that multi linked lists are implemented in C++. Simple example presented in this paper cover the usage of structures inside classes and template classes. Basic concepts of understanding object oriented multi linked lists are defined, and five groups of students are singled out. The main contribution of this research is in the domain of education: the specification of student's understanding of these concepts is given, as well as guidelines how to recover to full understanding of multi linked lists.

148. Ontological Model of the Standardized Secondary School Curriculum in Informatics

ICIST 2015 Proceedings Part II, 397-401
Mandić Milinko, Konjović Zora, Ivanović Mirjana
Abstract: The paper proposes ontological model of standardized secondary school curriculum in informatics. The model was created based on the ACM K12 CS curriculum proposal using competencies designed for the secondary level of education. The base class of ontological model is Competence with two direct subclasses (Knowledge and Skills). Skills are represented by classes corresponding to the categories of the cognitive process dimension of the revised Bloom's taxonomy. In addition to standardization of curriculum relying on ACM K12 CS curriculum model, a machine-readable representation that facilitates manipulation of the curriculum through applications intended for specific users (teachers, experts, administrative bodies, etc.) is proposed.

149. Architecture and Algorithms for Filtering Tweets Based on Chosen Countries and Cities

ICIST 2015 Proceedings Part II, 402-407
Igić Nemanja, Dimitrieski Vladimir, Luković Ivan, Aleksić Slavica, Čeliković Milan
Abstract: In this paper we present an algorithm for filtering Twitter data based on the tweet geographic location. Desired geographic locations are provided as a set of parameters, and different properties of a tweet are considered to determine the location. A user may also choose the number of threads and amount of memory used in filtering process. In this way, the user may fine-tune the algorithm performance. Filtered data are stored in the Hadoop distributed file system which runs on a 16 nodes cluster. Therefore, the analysis may be executed in a distributed environment. We also present system architecture which supports the filtering process and analysis of filtered data.

150. Automatic data extraction from radargrams

ICIST 2015 Proceedings Part II, 408-412
Ristić Aleksandar, Radulović Aleksandra, Govedarica Miro, Vrtunski Milan
Abstract: Radargrams are result of acquisition with GPR scanning technology. Most of underground utilities has cylindrical shape and is represented in radargrams by hyperbolic signatures. In this paper a new automated procedure for hyperbolic signatures detection and data extraction in radargrams is proposed. Extracted data is the set of points which represents vectorized form of hyperbolic reflections. Resulting data from automated procedure were later used to simultaneously estimate the radius of a cylindrical object and the wave propagation velocity based on fitted hyperbola geometries. Estimation of geometry parameters and wave propagation velocity from extracted set of points is a complete solution for underground utility and soil characterization. A number of experiments showed that the procedure is robust to various types of influences.

151. Orchestrating Music Queries via the Semantic Web

ICIST 2015 Proceedings Part II, 413-417
Vukićević Miloš, Galletly John
Abstract: This paper describes the design and implementation of a Semantic Web application that allows queries and inferences to be made on a music knowledge base using Semantic Web technologies such as RDF, OWL and SPARQL. Additionally, the paper explains how these technologies were blended together to develop the application that illustrates the principles of the Semantic Web.


ICIST 2015 Proceedings Part II, 418-421
Pletl Szilveszter, Pletl Gabor, Seres Regina
Abstract: The system described in this paper is a real time and interactive reporting system with information visualization. Currently and in the near future the services that are able to reach real time data, visualize it and offer a clear view of the presented information, are becoming more and more essential in the enterprise sector. These solutions are called “one button” solutions. The information needs to be available to the managers and company leaders from anywhere in the right format. The presented system is the core of a decision support system.

153. Measurement QoS Parameters of VoIP Codecs as a Function of the Network Traffic Level

ICIST 2015 Proceedings Part II, 422-426
Jocić Jugoslav, Veličković Zoran
Abstract: This paper analyzes the effect of the level of network traffic to the implementation QoS parameters of VoIP service in the LAN. We analyzed the number of dropped packets and packet delay variation for ten simultaneous VoIP connections. Manage Connections are made using the Asterisk VoIP server and several typical codecs are analyzed. Basic QoS parameters of VoIP services are measured in terms of variable network traffic. Measuring results clearly indicate that the number of dropped packets increases with increasing intensity of network traffic, and that very little depends on the user's VoIP codecs. On the other hand, the variation of packet delay crucial role has a selection of VoIP codecs is shown. In the realized experiment, all QoS parameters were in the preserved required limits.

154. An Efficient MATLAB Implementation of OFDM/OQAM Modulator with Orthogonal Pulse Shaping Filters

ICIST 2015 Proceedings Part II, 427-432
Vukotić Selena, Vučić Desimir
Abstract: In this paper we made a theoretical overview considering OFDM/OQAM signals in continuous and discrete time and we presented an orthogonality conditions for pulse shaping filters in discrete time. By introducing the efficient scheme of the OFDM/OQAM modulator [1], we gave our implementations of OFDM/OQAM modulator in MATLAB respecting the orthogonality conditions [3]. Based on the simulations results, power spectrums for different number of subcarriers and pulse shaping filters are shown.

155. Smart City Services for Citizen-Centric Internet of Things

ICIST 2015 Proceedings Part II, 433-438
Gligorić Nenad, Krčo Srđan, Drajić Dejan, Elicegui Ignacio, López Carmen, Sánchez Luis, Nati Michele, Bernabé Jorge Bernal, Hernández-Ramos José L., Carboni Davide, Serra Alberto
Abstract: SocIoTal project addresses a crucial next step in the transformation of an emerging business driven Internet of Things (IoT) infrastructure into an all-inclusive one for the society by accelerating the creation of a socially aware citizen-centric IoT. In this paper are described the scenarios selected for the field trials and pilot deployment in this project, together with the evaluation methodology. The purpose of field trials and pilots is to test the developments over real environments, with real users, facing all the constraints and limitations that a complex society can pose in these kinds of trials. Within the pilot’s evaluation process different methodologies and tools are considered: questionnaires and qualitative interviews from target groups collected during workshops where the services are presented to the end users, and real life testing.

156. PyTabs: A DSL for simplified music notation

ICIST 2015 Proceedings Part II, 439-443
Simić Miloš, Bal Željko, Vaderna Renata, Dejanović Igor
Abstract: In this paper we present pyTabs – a DomainSpecific Language (DSL) for simplified music notation. In pyTabs it is possible to describe a composition that consists of multiple sequences which can be specified in the form of a tablature or chord notation. One notable feature of pyTabs is the capability to play a musical piece written in it. We describe some major issues in simplified music notations (tablatures and chords) and propose a solution implemented in pyTabs project as a way of standardizing them into a formal language. puTabs is a free and open source project implemented in python programming language. It is available at: https://github.com/E2Music/pyTabs
Abstract: The Internet of Things for Healthcare (Healthcare-IoT) includes medical sensor devices as new sources of health information, new technologies and applications for remote diagnostics and monitoring of patients, equipment, drugs. Smart services for healthcare, anywhere and anytime, will bring the future of healthcare services, as a new level of healthcare. This paper considers the Healthcare-IoT through architectural layers and observes the users of the healthcare system in the context of a complex healthcare system which is integrated and whose traditional healthcare services need to be expanded with new functionalities of Healthcare-IoT such as sensing, tracking and monitoring, identification, authentication, automatic data collection. The technologies that should enable an IoT solution for healthcare are presented through architectural layers. The new business model and scenario should include valuable information in the existing healthcare services and choose the technologies that best match the desired model. Sensors and sensor networks, as well as new technologies, need to enable smart objects of healthcare to feel and change the environment, implement activities, communicate in real-time and share information. The data collected should be reliable, safe, processed in real time and analyzed, and they should provide a wealth of intelligence for planning, management and decision-making in the healthcare system. Many challenges for Healthcare- IoT, such as the interoperability during the integration with the inherited systems and electronic health records (EHR), need to be resolved. A holistic approach to designing Healthcare-IoT solutions and interdisciplinary knowledge should remove the gap between individual technology solutions and the integrated healthcare system expanded with IoT functionalities.

158. Limitations of Smartphone MEMS for motion analysis

ICIST 2015 Proceedings Part II, 450-454
Umek Anton, Kos Anton
Abstract: The paper presents the limitations of smartphone motion sensors and their suitability for simple biofeedback applications with motion detection. We have measured the smartphone accelerometer and gyroscope biases, identified the main causes for short-term and long-term bias variations, and quantified their precision. Under certain conditions the existing smartphones with their built-in inertial sensors are suitable for use in real-time biofeedback applications.

159. Segmentation and Three-Dimensional Visualization of Brain Tumor and Possibility of Mapping Such Algorithms on High Performance Reconfigurable Computers

ICIST 2015 Proceedings Part II, 455-459
Šušteršič Tijana, Mijailović Nikola, Milanković Ivan, Filipović Nenad, Peulić Aleksandar
Abstract: Brain tumor detection and visualization have important role in the process of the surgical operation, postoperative recovery and disease progression. In this paper methodology and algorithms for brain tumor extraction from the surrounding tissue and boosting the intensity of the tumor region is presented. The methodology is based on the fact that tumor tissue has different average gray value than healthy soft brain tissue. The process of segmentation with depth first search procedure is employed. Also, the possibility of mapping such algorithm on High Performance Reconfigurable Computers (HPRCs) is described. The input data used in this study are the set of the multi slice CT images. The obtained results and 3D reconstructed object can be new paradigm in the surgical assistance tools and brain tumor treatment.

160. Framework for early manufacturability and technological process analysis for implants manufacturing

ICIST 2015 Proceedings Part II, 460-463
Ristić Miloš, Manić Miodrag, Cvetanović Boban
Abstract: Patient specific implants, i.e. custom designed implants for an individual patient, are growing in popularity. This paper presents concept of a system, as well as the methodology of manufacturability analysis for custom designed implants manufacturing. System uses 3D model of implants with integrated implant knowledge. It also integrates a knowledge base and processes data base used for implants manufacturing. Set of rules gives recommendations for implants manufacturing and ranks them.


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