Limited resourses of fosil fuels and the greenhouse effect imposed a need for constant researches in area of usage of renewable energy sources (RES) a long time ago. Goal of this researches is using renewable energy sources more often. One of the types of renewable energy sources in Serbia is nonwood biomass. Nonwood biomass has two big advantages....

By Jelena Nikola Janevski, Branislav Stojanovic, Predrag Zivkovic, Dragana Dimitrijevic

This work presents computer simulation of mold filling and crystallization for a two-blade drill bit steel billet. Drawing-based models of a two-blade drill bit and its detachable casting mold were developed by SolidWorks. The developed solid model was transferred to the ProCAST program. The preliminary stages of a drill bit cast molding computer s...

By Panchuk Vitaliy, Pavlo Prysiazhniuk, Tetiana Pryhorovska, Lubomyr Ropjak, Igor Kogut, Lubomyr Boruschak, Shulyar Iryna

Electronic properties of pulsed laser deposited, nanoscale CeNi5 alloy layers, on a dielectric substrate are described using the complex dielectric function. This spectral behaviour is studied separately for the real part ε1 (the dielectric constant or dielectric permittivity) and imaginary part ε2 (the dielectric loss function) of ...

By Todoran Daniela, Radu Todoran, Zsolt Szakacs

The aim of article is to discuss interaction between stents implanted in the body of worker and harmonic magnetic field in the vicinity of electric wires. In last decades, a growing proportion of people has any devices implanted, to list: cardiac pacemakers, cardioverter – defibrillators. Recommendations of International Commision on Non-ioni...

By P Syrek, M Skowron

This paper presents the experimental study of electromagnetic radiation produced by different household equipment. Measurements were performed at various distances from the tested devices and in different operating modes of these, using the FA306 electromagnetic field analyzer. Also, it has been analyzed the cumulative effect of multiple sources. T...

By A Iagăr, G N Popa, C M Diniş

This paper aims to bring some clarification on grain refinement and modification of high strength alloys used in aerospace technique. In this work it was taken into account 7075 Al alloy, and the melt treatment was carried out by placing in the form of master alloy wire ternary AlTiB the casting trough at 730°C. The morphology of the resulting ...

By V Hotea, J Juhasz, F Cadar

This paper presents a computer-aided comparison of some of the most used electromagnetic shielding materials. Computer-aided design (CAD) model and the computer aided engineering (CAE) simulation technologies are used for the analysis of the electromagnetic field shielding performances of each material individually and a comparison will be establis...

By M L Conecici, C Munteanu, I M Purcar

Human resources are the most important resources of any work organization or institution. They are the bearers of the work process and are key in determining the quality of a product or service. The staff employed in an institution contributes with their work to its business success which is why the institution management should pay close attention...

By Lj Lepir, D Šćepović, A R Radonjić

The purpose of this paper is to create an original fuzzy solution on the existing structure of the control system of continuous casting that eliminates fissures in the poured material from the secondary cooling of steel. For this purpose a system was conceived with three fuzzy database decision rules, which by analyzing a series of measurements tak...

By G O Tirian, C A Gheorghiu, T Hepuț, R Rob

The existing framework of corporate governance has shown a number of weaknesses, and the result was a new economic crisis at the global level. The main problems were identified as: increased risk of investors, non-transparency of information, conflict of interest between corporation subjects. European Institute of Internal Auditors in response to t...

By T Dragičević Radičević, M Stojanović Trivanović, Lj Stanojević