SCIDAR - A Digital Archive of the University of Kragujevac

This paper presents a mathematical explanation of one of the Multi-Attribute Decision-Making (MADM) methods—the RAnking based on Distance And Range (RADAR) method—along with its modified variant, RADAR II. Through mathematical proofs, the influence of each step of the method on the final ranking of alternatives is analyzed. The methods are tested on three numerical examples with varying criterion weights. The robustness of the methods, as well as their fundamental characteristics, is demonstr...

The work tries to shed light on the phenomenon of duplicity observed in relation to the main female characters in Milutin Uskoković’s novel Če­do­mir Ilić. Doubleness is interpreted within the typology proposed by Ljiljana Ćuk, and therefore the presence of „I-doubles“ and „you-doubles“ is observed, which means that the splitting of the heroines takes place on two levels. The analysis is first of all directed towards the initial moment of manifestation of double personalities, as well as ...

Cycloid power transmissions belong to the group that can be classified as planetary gear trains. These power transmissions, reducers, are part of the latest generation of power transmissions, related to the conventional ones. Cycloid power transmissions have a wide range of applications in industries such as transporters, robots, satellites, etc. This research presents an analysis of various analytical methods that can be used in determining cycloid drive efficiency. The paper explores the mo...

This study focuses on preparing piezoelectric polyvinylidene fluoride (PVDF) nanocomposites reinforced with silver nanoparticles (AgNPs) using an electrospinning process. The aim of this study is to assess AgNPs’ influence on the piezoelectric properties of PVDF and, therefore, create an optimal piezoelectric composite with enhanced properties, enabling its application in various fields both as sensor and actuator. Because electrical stimuli have proven to have a positive influence in tissue ...

The amphibian and reptile species inhabiting the Mojstirsko-Draške Mountains have not been thoroughly studied yet. From 2013 to 2018, a comprehensive field study effort documented a total of 20 species, comprising eight amphibian species and 12 reptile species. Based on Sorensen's coefficient of similarity, this area closely resembles other locations in the Republic of Serbia. The presence of species was determined through direct observation of adult or larval forms, identification of distinc...

In the context of today’s rapidly evolving automotive market, improving the reliability and efficiency of manufacturing processes remains a critical challenge for industry players. This study introduces a hybrid multi-attribute decision-making model that integrates Failure Mode and Effects Analysis (FMEA) with interval type-2 fuzzy set theory to classify and prioritize process failures. The approach enables the FMEA team to systematically identify and rank failure modes, facilitating the time...

U cilju zaštite životne sredine i smanjenja emisije štetnh gasova u pomorstvu Međunarodna pomorska organizacija (International Maritime Oraganization - IMO) je uvela zahtjeve energetske efikasnosti za brodove, koji se uglavnom odnose na smanjenje potrošnje goriva. Povećanje cijene goriva kao i primena različitih propisa koji definišu ograničenja emisija štetnih gasova u atmosferu i sankcije za njihovo nepoštovanje doveli su do intezivnije primene fotonaponskih sistema na plovilima. Primjena ...

The performance of solar systems is affected by the value of its tilt angle with respect to the horizontal surface, where the variation of tilt angle changes the amount of incident solar radiation. In this paper, hourly extraterrestrial solar irradiance, beam, diffuse and solar radiation on the tilted surface is modeled and calculated based on measured data of the global solar radiation on horizontal surfaces for Čačak (lat 43.87° N, long 20.33° E). The computer program has been done to ...