When designing machines that contain dynamic components, it is necessary to consider the tribological properties of the materials used for the functional parts of these components. The movement itself during the operation of the machines has a mechanical impact on these parts, which may result in the performance of the mechanism being affecte...

By Michaela Dilyova, Michal Hatala, Svetlana Radchenko, Frantisek Botko, Zuzana Mitalova

 In this work were synthesized hybrid materials based on aliphatic polyurethanes and small amounts of titanium dioxide nanoparticles (0.5; 2.0 and 3.0 wt.%). From an environmental point of view, this synthesized hybrid materials are significant engineering materials because the products of their thermal degradation are significantly less toxic...

By Jelena Pavličević, Dejan Kojić, Milena Špírková, Mirjana Jovičić, Bojana Ikonić, Vladan Mićić, Jaroslava Budinski-Simendić

 In this paper, the influence of thermoplastic segmented polyurethanes on the curing kinetics of epoxy based hybrid materials was assessed. Samples were prepared with diglycidil ester bisphenole A epoxy resin and different content (10, 15 and 20 wt. %) of thermoplastic segmented polyurethanes with different content of hard segments (20, 25 and...

By Vesna Teofilović, Mirjana Jovičić, Jelena Pavličević, Oskar Bera, Snežana Sinadinović-Fišer, Milena Špírková, Ayse Zehra Aroguz

 Aerogels with large surface area, are very light related to the filling of pores with air (99%). Due to these features scientific studies on aerogels have increased at great speed. Aerogels are obtained using many materials as inorganic substances like silica as well as cellulose as biodegradable organic polymers. Bacterial cellulose is eco-f...

By Canan Karakus, Ayse Zehra Aroguz

 This paper discusses the selection of the most technically suitable method of transporting lime powder within the existing plant at the lime factory. From the production line, lime powder must be transported to the factory silo. Of the more technically feasible variants analysed, flying pneumatic transport was chosen as the most favourable va...

By Mirko Dobrnjac, Slobodan Rakulj

 The reinterpretation of classical art into digital art was taken as the basic framework within which I moving with using two concepts: classic and digital. Both terms represent different epochs, in which the notion of classical art implies a much longer period of time, making it more difficult to use without opting for a shorter period of tim...

By Marija Jevtić Dajić

 After the turbine oil life cycle has been completed, it is necessary to replace it. The new generation of turbine oils is formulated with Group II and/or III base oils and a package of ashless additives. Such oils are often incompatible with conventional types of turbine oil. The new oil in the system also has the ability to dissolve residual...

By Mirko Petković, Valentina Petković, Tatjana Mirković, Tatjana Botić, Pero Dugić

The basic idea of inverse optimal control theory for nonlinear systems is to find a feedback control law based on a priori knowledge of a Control-Lyapunov function (CLF), that leads to Lyapunov stability of the system and minimizes a cost functional [1], [4]. The problem of inverse optimal control leads to the Hamilton-Jacobi-Bellman (HJB) equation...

By Nicolae Pop, Luige Vlădăreanu, Adrian I. Pop

Modern processing is a combination of individual production cell, designed to complete the business of manufacturing parts of subassemblies and their integration into the final product of the product. The success of such a system depends on stability operations while minimizing the possible errors in the system. The continuous monitoring system is ...

By Tihomir Savo Latinovic, Mladen Todic, Cristian Barz, Adina Pop-Vadean, Paul Petrica Pop

This paper presents a study of the fuel cell system performance operating at low pressure. A polymer electrolyte fuel cell (PEMFC) is analyzed in according with the possibility of using in transport applications. So, it begins with the description of a parametric model of the fuel cell which has been developed using a combination between empirical ...

By Radu Adrian Tirnovan, Constantin Pica, Maria Cristea, Cosmin Dărab