Keynote Speakers


The Personalization of a Cloud Ecosystem:
Adding Dimensions to Situational Awareness

Gordana Velikic, Milan Bjelica, Nemanja Ignjatov, Mica Cetkovic, Ivan Kastelan, RT-RK Institute, Novi Sad, Serbia

The lack of easy to use environment to connect and manage the things is one of the obstacles that hold back multimodal personalized use of Internet of Things. We present a novel idea and a cloud framework with original elements that enable development of ecosystem for the user tailored deployment of things in the context of a personalized situational awareness. The benefits of the infrastructure are fortified with several use case scenarios that provide an insight to the platform’s innovative possibilities.


Optical Chemical Sensors for Industrial Applications

Zoran Jakšić, Centre of Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, University of Belgrade,
Belgrade, Serbia

The market for accurate and inexpensive sensors of chemical compounds in gases and liquids is increasing at a steady pace and it is expected that in 2015 the global demands should reach a level of more than US$ 17 billion. Industrial applications of optical chemical sensors include process and quality control, as well as environmental pollution measurements in different fields that include process industry, automotive, biomedical industry, power engineering, oil and gas industry and food industry. Optical sensing methods offer some distinctive advantage over other approaches, including the applicatibility in dangerous, flammable and explosive environments, high sensitivities, compact design and insensitivity to external interference. They can be used to recognize trace amounts of a wide range of different chemicals, are compatible with the existing control systems and can be used for multianalyte detection. This work first shortly reviews different schemes utilized for all-optical chemical sensing in gases and liquids. These include various planar and fiber-optic waveguide systems that utilize absorption, transmission or reflection spectroscopy, fluorescence measurements that may be applied to propagating or evanescent waves. Affinity sensing is considered, where the optical sensor surface or a special intermediate receptor layer binds the targeted analyte, which in turn causes physicochemical transformations that modulate the optical properties of the system. The most part of the presentation is dedicated to sensors utilizing surface plasmon polaritons in metal-dielectric nanocomposites. These devices offer label-free, real-time and multianalyte operation with sensitivities even reaching single molecule level. Different schemes are considered including the use of optical metamaterial structures for adsorption-based sensing. The advantages and disadvantages of these sensing schemes are considered.


The Use of Microcontrollers in Modern Solutions of Power Electronics

Miroslav Lazić, Dragana Petrović, Miodrag Skender, IRITEL a.d. Beograd, Belgrade, Serbia

The role of modern power electronics is to provide reliable and uninterruptible power supply for the consumer. Power plants are most common primary source of energy. That energy is distributed to consumers by large power grid. Secondary power  sources are usually some sort of alternative power sources or batteries. All power sources must be controlled all the time. There must be a system of power electronic devices that  provides reliable and continuous power supply operation. Modern power electronic devices are switching type. The basic elements of a switching power supply are power electronics and control electronics. The control electronics are suitable for controling with logical circuits. Because of that, microcontroles are now part of every modern power electronics devices. If the system have more the one power electronic devices that must be controlled by the microcontroller. Multiply microcontroles must be  coordinate to work as one. This paper describes an implemented solution of uninterrupted power supply for telecommunication equipment that use either power grid either alternative power source either battery pack. The microcontroller is a part of every power source that equipment use. Also it controls and adjust all the power sources so that equipment have reliable and continuous power supply.

Vojin Oklobdžija, New Mexico State University, Las Cruces,

Script Recognition by Statistical Analysis of the Image Texture

Darko Brodić, Technical Faculty in Bor, University of Belgrade, Bor, Serbia

The paper proposed an algorithm for the script identification using the statistical analysis of the texture obtained by script mapping. First, the algorithm models the script sign by the equivalent script type. The script type is determined by the position of the letter in the baseline area. Furthermore, the extraction of the features is performed. This step of the algorithm is based on the script type occurrence and co-occurrence pattern analysis. Then, the resultant features are compared. Their differences simplify the script feature classification. The algorithm is tested on the German and Slavic printed documents incorporating different scripts. The experiment gives the results that are promising.