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 heat transfer operation is extremely important in various technologies, especially in the rubber industry for crosslinking and for all the steps in the process of obtaining products from elastomeric materials. The speed at which the heat can be transferred to the rubber compound or taken away from it affects the design of the process equi...

By Vladan Mićić, Jaroslava Budinski-Simendić, Branko Pejović, Jelena Pavličević, Mitar Perušić, Ljiljana Tanasić, Duško Kostić

 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

 Epoxidized vegetable oils have seen increasing application diversity in chemical and polymer industry. They are mainly used as stabilizer and plasticizer for polyvinyl chloride (PVC). However, they are also promising intermediates for the production of other vegetable oil derivatives. Vegetable oils are epoxidized in the industry with in situ...

By Olga Govedarica, Milovan Janković, Snežana Sinadinović-Fišer, Vesna Teofilović, Mirjana Jovičić, Ayse Zehra Aroguz

 In modern, continental law, division of law into public and private one is generally accepted. Historical root of that division can be found in Ulpian, and its principled concept is also present in modern law systems. That also applies to domain of contract law. Thus, legal theory distinguishes public law contracts and private law contracts. ...

By Zoran Filipović

 IT co-creation seen as the act of creating solutions together brings different stakeholders side by side (e.g. companies, groups of customers, IT developers, innovators, citizens, etc.), in order to develop a co-operatively satisfying and valued output in the IT innovation process. In general, it requires changing the traditional approaches o...

By Gabriela Mezeiová

 The paper describes the implementation of an Elastisearch, Logstash and Kibana (ELK) stack to process, analyze and display of IoT data originating from several types of sensors. The prepared Elasticsearch platform collects and integrates real data generated by various sensors for further processing and publishing the desired information. Stor...

By Nebojša Kuduz, Saša Salapura

 Flooding is natural disaster which is very frequent and most costly and unfortunately, we were witnessed flood in region in previous years. This paper will describe the usage of Internet of Things (IoT) technology to monitor river behavior in order to prevent or mitigate the recurrence of disasters. The paper also describes development and de...

By Saša Salapura, Nebojša Kuduz

 Nowadays, an increasing number of criminal offenses have been committed in order to gain property benefits, in particular, criminal offenses of corruption and criminal offenses of organized crime or serious forms of economic crime. When analysing the aforementioned criminal offenses, in addition to focusing attention on the perpetrator and th...

By Jovan Miljković

 The continuous increasing of requirements for product quality leads to increased flaw control and evaluation. One of the inspected parts of the product is a welded joint. The flaws should be eliminated as far as possible to avoid the failure or destruction of the product. In the field of weld inspection, there is the most used the non-destruc...

By Dusan Sutak, Michal Hatala, Dusan Mital, Igor Olexa, Enes Sukic