Приказано Факултет техничких наука за наслов
Приказ резултата 21-40 од 131
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The effect of aging of surface non-metallic coatings on the ampacity of medium voltage rectangular bus bars
(The 7th Virtual International Conference on Science, Technology and Management in Energy (eNergetics 2021), 2021-12)There are two major types of non-metallic coatings for bus bars: oil-and epoxy-based coatings. The oil-based coatings have a limited lifespan of a few years, while the epoxy-based ones have a lifespan of over ten years. ... -
Effect of Chemical Composition on the Microstructure and Properties of the Ag-Ga-Ge Alloys
(Journal of Materials Engineering and Performance, 2019-05)This study presents a comparison of thermodynamically calculated phase compositions of Ag-Ga-Ge alloys at fixed temperatures with phase analysis results of alloys annealed at respective temperatures. Three isothermal ... -
Effect of Chemical Composition on the Microstructure, Hardness and Electrical Conductivity Profiles of the Ag-Bi-Ge Alloys
(Materials Research, 2019-10)Microstructure, hardness and electrical properties of the selected ternary Ag-Bi-Ge alloys were investigated in this study. Isothermal sections of the Ag-Bi-Ge system at 25, 100 and 500 °C have been extrapolated using ... -
Effect of chemical composition on the microstructure, hardness and electrical conductivity profiles of the Bi-Ge-In alloys
(Metallurgical and Materials Engineering, 2020)In this study, the microstructure, hardness,and electrical properties of selected ternary Bi-Ge-In alloys were investigated. Isothermal sections of the Bi-Ge-In system at 25, 200, and 300 °C were extrapolated using ... -
THE EFFECT OF DIFFERENT SKY TEMPERATURE MODELS ON THE ACCURACY IN THE ESTIMATION OF THE PERFORMANCE OF A PHOTOVOLTAIC MODULE
(Technical University of Gabrovo, 2019-11-22)This paper considers the effect of different sky temperature models on the accuracy in the estimation of the performance of an open-rack-mounted photovoltaic (PV) module. It is found that, for the same ambient conditions, ... -
EFFECT OF ILLUMINATION IN CHROMA KEY EFFECT IN THE REALIZATION OF VIRTUAL TELEVISION STUDIO
(SINTEZA, 2018)This paper analyzes the effect of front and back light on the Chroma key effect in a virtual TV studio. The model of the system in which the experiment was realized is given. Different intensity of front and back light ... -
The Effect of Material Heterogeneity and Temperature on Impact Toughness and Fracture Resistance of SA-387 Gr. 91 Welded Joints
(Materials, 2022-03)This paper presents the analysis of the behavior of welded joints made of 9–12% Cr-Mo steel SA-387 Gr. 91. The successful application of this steel depends not only on the base metal’s (BM) properties but even more on ... -
The effect of solar radiation on the ampacity of an underground cable with XLPE insulation
(The 4th Virtual International Conference on Science, Technology and Management in Energy (eNergetics 2018), 2018-10)The main purpose of this paper is to quantify the thermal effect of solar radiation on the ampacity of a low voltage underground cable with cross-linked polyethylene (XLPE) insulation. The quantification was performed for ... -
Effect of temperature and exploitation time on tensile properties and plain strain fracture toughness, KIc, in a welded joint
(Procedia Structural Integrity, 2018)Effect of temperature and exploitation time on resistance to brittle fracture of welded joint constituents of new and 40 years exploited low-alloyed Cr-Mo steel A-387 Gr. B has been analysed. The plane strain fracture ... -
Effect of the cascade neutralization energy on the surface modification by the impact of slow highly charged ions
(University thought - Publication in Natural Sciences, 2019-03)e consider the neutralization dynamics of slow highly charged ions in the interaction with a metal surface covered with a thin dielectric film from the standpoint of the surface modification. The quasi-resonant two-state ... -
Electrochemical characterization and estimation of DNA-binding capacity of a series of novel ferrocene derivatives
(Bioelectrochemistry, 2020-04)The synthesis of a series of methyl 2-alkyl-5-aryl-4-ferrocenoylpyrrolidine-2-carboxylates has been achieved by [3 + 2] dipolar cycloaddition of azomethine ylides to acryloylferrocene. The electrochemical properties of ... -
Eliminating the effect of hot spots on underground power cables using cool pavements
(Electrical Engineering, 2019-10-24)It is well known that hot spots limit the ampacities of underground power cables. There are many commonly applied methods to control the thermal environment in hot spots of underground power cables. However, applications ... -
Estimation of tool wear according to cutting forces during machining procedure
(Sensor Review, 2018-03)Purpose The main purpose of the study was to analyze the relationship between cutting forces and tool wear during turning of steel 30CrNiMo8. Design/methodology/approach It is very important to find the optimal machining ... -
Evaluation of acid mine drainage kinetics in the lead-zinc mine
(Arabian Journal of Geosciences, 2020-05)In this paper the comparative results of on-site analysis and modelling of the mechanisms and kinetics of the mining waters in the ore deposit Crnac are presented. The research process included hydrogeology explorations ... -
Evaluation of heating efficiency and thermal comfort in special purpose vehicle cabins
(Thermal Science, 2021)The paper presents the integrated application of two methods during testing HVAC system efficiency in the cabins of HUMMER М1151A1 and OAR 1RL-128D off-road vehicles. Spatial measurements of change in air temperature per ... -
Evaluation of information and communication technology sector in the teaching process and strategic collaboration between universities and industry
(COMPUTER APPLICATIONS IN ENGINEERING EDUCATION, 2019-02)The main purpose of the study was to evaluate the information and communication technology (ICT) sector in the teaching process based on teachers’ attitudes and the strategic collaboration between universities and industry. ... -
Experimental analysis of wavelet decomposition on edge detection
(PROCEEDINGS OF THE ESTONIAN ACADEMY OF SCIENCES, 2019)The influence of different wavelet transformations and decomposition on edge detection was examined, using convenient operators to images of various complexities. Berkeley Segmentation Database images with the corresponding ... -
Experimental and numerical study of temperature field during hard facing of different carbon steels
(Thermal Science, 2020)In this research the 3-D transient non-linear thermal analysis of the hard-facing process was performed by using the experimental testing and finite element method. Testing was done at three different carbon steels and the ... -
Experimental Comparisons of Metaheuristic Algorithms in Solving Combined Economic Emission Dispatch Problem Using Parametric and Non-Parametric Tests
(Applied Artificial Intelligence, 2018-08-20)In this paper, the parametric and non-parametric statistical tests are applied for comparisons of metaheuristic algorithms’ (MAs) behavior in solving Combined Economic Emission Dispatch (CEED) problem. In the last years, ... -
Experimental Evaluation of 300 ºC section of Cu-In-Ni Phase Diagram, Hardness and Electrical Conductivity of Selected Alloy
(Materials Research, 2018-03)The paper reports comparative experimental and thermodynamic calculation of a Cu-In-Ni ternary system. An isothermal section of the Cu-In-Ni system at 300 ºC was extrapolated using optimized thermodynamic parameters for ...