Belgrade, Serbia
Belgrade, Serbia

Singidunum University is a private university in Belgrade, Serbia. The first of the faculties, the integral part of the university, was founded in 1999, while the university itself was established in 2005 following the decision issued by the Council for University Education Development of the Republic of Serbia. Singidunum University offers Bachelor’s, Master’s and Doctoral degree programmes in the fields of social science, formal science and applied science.Singidunum University is established in accordance with the Bologna Process education model by implementing the European Credit Transfer System . The appropriate curricula and degree structure have been created on the bases of well-known models of European faculties and colleges, and the best practices of Serbian national faculties. Wikipedia.


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Antonijevic D.,Singidunum University | Komatina M.,University of Belgrade
Renewable and Sustainable Energy Reviews | Year: 2011

Considering the necessity of improvement of Serbian energy production structure through higher participation of clean and renewable energy sources, the possibility of utilization of low enthalpy geothermal waters have been investigated. Energy potential of ground waters of modest temperature levels is usully neglected since it can not be used for direct heating purposes. Nevertheless, if the appropriate heat pump system is utilized, as described in the paper, the energy efficient and environmentally friendly heating could be achieved. From the environmental aspect particularly interesting would be the application of sub-geothermal heat pump in already existing high-temperature residential heating systems, as a complete substitution of old, low efficiency, highly polluting central heating of a building or a housing block. Besides environmental benefits of the proposed solution, obtained through shutting down the fossil fuel energy sources, paper investigates energetic efficiency of the model system, and discusses its economic justification. To achieve a full sustainability of the proposed heating system the environmental risks, especially deposition of utilized sub-geothermal water, need to be observed in detail. © 2011 Elsevier Ltd. All rights reserved.


Milosevic-Dordevic J.S.,Singidunum University | Milosevic-Dordevic J.S.,Institute for Political Studies | Zezelj I.L.,University of Belgrade
Computers in Human Behavior | Year: 2014

The popularity of social networking sites (SNS) changed to a great extent not only media environment, but also everyday life activities of modern humans. Despite their obvious benefits in terms of communication, there is evidence of addictive tendencies in SNS use. The study examined psychological and socio-demographic predictors of these addictive tendencies in Serbian SNS users drawn from a representative sample (N = 2014), having in mind that Serbia has Facebook penetration rate over European average. Results indicate a low incidence of self-reported addictive tendencies, with some individual differences worth addressing. We developed and tested exhaustive model that included three sets of predictors (socio-demographic, psychological and exposure to traditional media), as well as restrictive models that systematically excluded group by group. Path analysis revealed that psychological traits were stronger predictors than socio-demographic ones: people with lower self-esteem, lower general self-efficacy and higher introversion were more likely to report addictive SNS use. Although our results in general support the so called "social compensation hypothesis", it can be due to the focus on addictive tendencies instead of other indicators of SNS use. © 2013 Elsevier Ltd. All rights reserved.


Zlatanovic I.,University of Belgrade | Komatina M.,University of Belgrade | Antonijevic D.,Singidunum University
Applied Thermal Engineering | Year: 2013

The paper presents results of an experimental investigation of convective drying of Idared apple in full recirculation laboratory scale dryer. The experiments were conducted with cube-shaped apple samples (side length 10 and 13 mm), without pre-treatment. The parameters of air stream over the tray with samples were fully controlled and adjusted in several sets of experiments, while always remaining in the following ranges: temperature 35-55 °C, relative humidity 10-30%, velocity 1-2 m/s. The drying kinetics of the apple samples was recorded, the results were analyzed and compared to the existing drying models. The analysis of the experimental results enabled derivation of correlations between drying parameters in a form k = f(T,RH), within Henderson & Pabis drying model MR = aexp(-kτ), as well as the calculation of effective moisture diffusivity during the process. © 2013 Elsevier Ltd. All rights reserved.


Ruj S.,Indian Statistical Institute | Stojmenovic M.,Singidunum University | Nayak A.,University of Ottawa
IEEE Transactions on Parallel and Distributed Systems | Year: 2014

We propose a new decentralized access control scheme for secure data storage in clouds that supports anonymous authentication. In the proposed scheme, the cloud verifies the authenticity of the series without knowing the user's identity before storing data. Our scheme also has the added feature of access control in which only valid users are able to decrypt the stored information. The scheme prevents replay attacks and supports creation, modification, and reading data stored in the cloud. We also address user revocation. Moreover, our authentication and access control scheme is decentralized and robust, unlike other access control schemes designed for clouds which are centralized. The communication, computation, and storage overheads are comparable to centralized approaches. © 1990-2012 IEEE.


Maksin M.,Singidunum University
Spatium | Year: 2012

Research on natural and cultural heritage as one of the key levers of sustainable tourism development in Serbia has been conducted 2010, for the elaboration of the Master plan for Sustainable Rural Tourism Development in Serbia. To evaluate achieved and potential attractiveness of natural and cultural heritage at rural Serbia the FAS methodology was implemented, and the results of this evaluation are discussed. Based on achieved and potential attractiveness and accessibility of natural and cultural heritage, and other criteria, the rural tourism clusters have been established. Methodology for rural tourism clusters identification and prioritization is presented, and the results of prioritization discussed. Elaboration of the Master plan for Sustainable Rural Tourism Development in Serbia has been based on the holistic approach. Therefore the aim of rural tourism development is to protect, revitalize and use the natural and cultural assets in sustainable way to benefit the rural communities. Challenges and possibilities for sustainable heritage utilization, sustainable rural tourism development, and management arrangements are discussed for two cases-Viminacium archaeological park and Mountain Stara planina Nature Park. Based on analyzed cases the evaluation criteria for management of sustainable heritage utilization and rural tourism development are proposed.


Stojmenovic M.,Singidunum University
Proceedings of the 2012 15th International Conference on Network-Based Information Systems, NBIS 2012 | Year: 2012

The cloud computing concept became popular in 2006 and encapsulates a business model of providing services across the Internet. The Mobile Cloud Computing (MCC) concept was proposed in 2007. Recent advances in cloud computing have given a platform to various computationally heavy tasks and made them readily accessible to even mobile devices. Biometric applications are dedicated to fingerprint, face, or iris scanning and they typically work in a laboratory setting where the client computer has unlimited access to the throughput and computational resources of the network. Mobile devices can bring biometric evidence back to the laboratory in order for it to be processed. On a cloud infrastructure, information processing could be completed much faster. The limiting factor then becomes the battery power of the device and the throughput of the communication channel of the client node to the cloud. It is important to reduce as much as possible the packet size of the query or task given to the cloud, and also minimize the size of the received response to be able to incorporate cloud biometric technology for real time evidence processing. This position paper sets the mobile cloud computing agenda for biometric applications. © 2012 IEEE.


Ruj S.,University of Ottawa | Stojmenovic M.,Singidunum University | Nayak A.,University of Ottawa
Proceedings - 12th IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing, CCGrid 2012 | Year: 2012

In this paper, we propose a new privacy preserving authenticated access control scheme for securing data in clouds. In the proposed scheme, the cloud verifies the authenticity of the user without knowing the user's identity before storing information. Our scheme also has the added feature of access control in which only valid users are able to decrypt the stored information. The scheme prevents replay attacks and supports creation, modification, and reading data stored in the cloud. Moreover, our authentication and access control scheme is decentralized and robust, unlike other access control schemes designed for clouds which are centralized. The communication, computation, and storage overheads are comparable to centralized approaches. © 2012 IEEE.


Markovic D.S.,Singidunum University | Zivkovic D.,Singidunum University | Branovic I.,Singidunum University | Popovic R.,Singidunum University | Cvetkovic D.,Singidunum University
Renewable and Sustainable Energy Reviews | Year: 2013

As a consequence of rapidly increased CO2 emissions, humanity is facing global warming. Electricity generation accounts for almost half of the emission; besides, conventional electrical production based on fossil fuel is becoming more and more expensive. One approach to significantly slow down global warming is to drive our society away from the current fossil fuel fiesta and use only renewable power such as solar and wind energy. Another approach is to improve the management of energy production, transmission, and distribution. Part of the latter solution is on the supply side, where one possible solution is to develop continent-wide smart power grids and energy storage systems. However, an equally important part of the solution is on the demand side, where technologies and applications that can work with this type of unpredictable energy consumption are becoming necessary. The smart power grid with new sources of data, fast growth of information, and proactive management requires new strategy for business and operational management. In this paper we discuss how Cloud computing model can be used for developing Smart Grid solutions. The Cloud computing model is based on the delivery of computing as a service, whereby storage, software and information are provided to computers and other devices as a commodity over the Internet. The advantages of Cloud computing - reduced costs, increased storage, on-demand performance, and better flexibility - have motivated many companies in recent years to move their IT operations to the cloud; the same advantages can be used to achieve the most important future goals of a large-scale Smart Grid, such as energy savings, two-way communication, and demand resource management. © 2013 Elsevier Ltd.


Markovic D.,Singidunum University | Cvetkovic D.,Singidunum University | Masic B.,Singidunum University
Renewable and Sustainable Energy Reviews | Year: 2011

The aim of this work is to present practical tools to analyze energy, economic and environmental performances of energy generation systems, buildings and equipments in a community. The models and software tools presented are very different to each other and are designed to support different phases in an efficient community project implementation. © 2011 Elsevier Ltd. All rights reserved.


Markovic D.,Singidunum University | Cvetkovic D.,Singidunum University | Zivkovic D.,Singidunum University | Popovic R.,Singidunum University
Renewable and Sustainable Energy Reviews | Year: 2012

Energy saving is an important issue in the times of increasing energy prices. Products and services provided by the information and communication technology (ICT) can support energy efficiency and emissions reductions. The synergy of ICT and a residential area gives rise to the smart home environment. Ecological and smart home network applications should not only improve the peoples life satisfaction in the domain of health care, security protection, and efficient management of energy and resource consumption, but they should also enable personal happy life through easy communication with community people, high level entertainment, continuous education and so on. A smart home in the smart grid is the latest addition to a family of ideas emerging in relation to the ICT usage in the home. This paper presents an overview of the smart home concept and some challenges that ICT faces in that environment. © 2011 Elsevier Ltd. All rights reserved.

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