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Item Proceedings - 52nd International October Conference on Mining and Metallurgy - IOC 2021, November 29th - 30th 2021, Bor, Serbia(University of Belgrade, Technical Faculty in Bor, 2021) Stojadinović, Saša; Petrović, DejanItem Proceedings - XV International Mineral Processing and Recycling Conference, IMPRC, 17-19 May 2023, Belgrade, Serbia(University of Belgrade, Technical Faculty in Bor, 2023) Sokolović, Jovica; Trumić, MilanItem Proceedings - 30th International Conference Ecological Truth & Environmental Research - EcoTER'23, 20-23 June 2023, Serbia(University of Belgrade, Technical Faculty in Bor, 2023) Šerbula, SnežanaItem Proceedings - 54th International October Conference on Mining and Metallurgy - IOC 2023, 18-21 October 2023, Bor Lake, Serbia(University of Belgrade, Technical Faculty in Bor, 2023) Balanović, Ljubiša; Tanikić, DejanItem Increasing the capacity of the copper smelting company in the company "Serbia Zijin Copper" - challenges and consequences to the environment(University of Belgrade, Technical Faculty in Bor, 2021) Stanković, Velizar; Janošević, MilošThrough this paper a critical review will be given on the ENVIRONMENTAL IMPACT ASSESSMENT STUDY, presented to the public discussion, in the frame of Serbia Zijin Copper Co. intention of increasing a production capacity of copper in the existing Flash copper smelter and the auxiliary installations, from its nominal capacity of 80.000 tCu/year on a significantly enlarged one.Item Study of temperature phase transformation of theternary Bi-Cu-Ge system(University of Belgrade, Technical Faculty in Bor, 2021) Đorđević, Aleksandar; Minić, Duško; Premović, Milena; Mansijević, Dragan; Milosavljević, Milan; Ristić, VladicaDecades of scientific work dedicated to the investigation of phase diagrams gave significant benefit to industry and science. After all those years of phase diagram investigation still there is missing information about phase diagram of some ternary systems. One of those systems is Bi-Cu-Ge. It is known importance of Cu-based alloys and Ge-based alloys in electro industry. Since such combination is not tested before this work will provide information about phase diagram of the three vertical sections from ternary Bi-Cu-Ge system. From each vertical sections (Bi-CuGe, Cu-BiGe and Ge-BiCu), 4 alloys were prepared and tested by DTA. Experimentally obtained results were compared with corresponding vertical sections. Experimental temperatures of phase transformation shows close value with calculated one. Temperatures of liquidus curve and primary crystallization were determined.Item Dualphased fourway intersection regulated by traffic lights with fixed and adaptive mod of operation(University of Belgrade, Technical Faculty in Bor, 2021) Radivojević, Milan; Stević, Zoran; Tanasković, MarkoRoad traffic in many populated areas is mainly regulated using a traffic light, which in many cases is not sufficiently effectively configured. This can lead to unnecessary long waiting times and increase total time losses when passing through the intersection. This paper presents the results of the application program of the adaptive semaphore system of the four-way two phase intersection, made using the LabVIEW software package, as well as the data and results of the analysis of the functioning of the intersection with adaptive and fixed traffic mode.Item Place of biocultural heritage in post covid-19 tourism destination choice(Naučno-stručno Društvo za zaštitu životne sredine Srbije ECOLOGICA, 2023) Luković, Milica; Pantović, Danijela; Riznić, Dejan; Lakićević, Marija; Milutinović, Sonja; Jovanović, Larisa; Ermakov, Vadim; Balaban, SuzanaRural space, protected areas, and nature in general become so-called “hot spots” in the tourist perspective in the last two years. The covid-19 outbreak caused growing commercial tourism to have a tendency to transform and go a step far from sustainability to regenerative directions. These changes consider “to rebuild”, “renew”, and “getting back to tradition and roots” where ecosystem services and wild plants in focused. In recent times, several studies of tourists’ behaviors and attitudes towards utilization and interest in wild edible plants have been conducted. This study represents the results of research conducted on 53 tourists and 20 local touristic households in the Biosphere “Golija-Studenica” to explore relationships between wild edible plants utilization/collection and the tourism experience. According to the results, there is an increased interest or demand for wild edible plants by tourists and local people. On the one hand, these demands are the result of long traditions and on the other hand the increased desire for healthy food. Different socio-demographic backgrounds of tourists impact their environmental awareness, knowledge and education on goods and services from nature. This study highlights the need to fulfil ecological responsibility when tourism occurs in ecologically worth areas to achieve bicultural conservation and regenerative approach.Item Regional printed media as an actor of sustainable development of rural areas(Naučno-stručno Društvo za zaštitu životne sredine Srbije ECOLOGICA, 2023) Vuković, Milovan; Vuković, Aleksandra; Štrbac, Nada; Urošević, Snežana; Jovanović, Larisa; Ermakov, Vadim; Balaban, SuzanaThe presence of issues of sustainable rural development in media has multiple effects on overall development od rural population: socio-cultural, economic, political and environmental. Socio-economic development of rural regions is based not only on improvement of agriculture bat also on creating conditions which would allow the incomes of rural households in the other economic activities. Media by dissemination of useful messages media may contribute to the awareness and education of rural inhabitants and, therefore, directly influence the development of rural communities and regions. It has been known, for a long time, that media are a significant actor in the he process of social changes. The printed media, especially daily newspapers, have a desisive role in this process due to their larger number of published analitycal texts. The objective of this research is to find out the number of articles dealing with sustainable rural development, their frequency of appearance, and the journalist form used on the example of daily Serbian regional newspaper. The research has been conducted, using the regional newspaper Narodne novine, in 2022 year (last three months). The method of content analyis, of quantiative-qualitative type, was used and the unit of analysis was each text dealing with rural development. It was identified 179 such newspaper textual unites. It was noticed that the Narodne novine covers various topics connected with daily life on contryside, agriculture, diversification of rural economy and environmental protection.Item Ispitivanje separabilnosti ugljeva primenom koeficijenta separabilnosti, IW I NGMI indeksa(Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2023) Sokolović, Jovica; Ilić, Ivana; Trumić, Milan; Bogdanović, Grozdanka; Kostović, MilenaU radu su prikazani rezultati ispitivanja i ocene separabilnosti različitih vrsta ugljeva primenom koeficijenta separabilnosti, indeksa mogućnosti čišćenja (IW) i indeksa materijala u zoni ± 100 kg/m3 (NGMI). Ispitivanja su vršena primenom pliva-tone analize na uzorcima ravnog uglja iz rudnika antracita "Vrška Cuka", rudnika lignita "Lubnica" i rudnika mrkog uglja "Bogovina". Na osnovu dobijenih rezultata pliva-tone analize za sva tri uzorka ravnog uglja izračunate su vrednosti koeficijenta separabilnosti, indeks mogućnosti čišćenja i NGMI indeks. Dobijene vrednosti koeficijenta separabilnosti (K) na gustinama od 1350 kg/m3 do 1650 kg/m3 ukazuju da je sirovina separabilna u datom opsegu gustina, kao i da ugljevi imaju bolju separabilnost na gustini 1350 kg /m3. Međutim, uzimajući u obzir i vrednosti indeksa NGMI, zaključuje se da čišćenje (separaciju) uglja treba vršiti na većim gustinama razdvajanja, jer izračunate vrednosti NGMI indeksa na većim gustinama ukazuju na lakše čišćenje uglja.Item Mining solid waste around Bor, yesterday, today, tomorrow(The Academy of Applied Technical Studies Belgrade, 2023) Trumić, Milan; Nikolić, Vladimir; Marić, Mirjana; Janković, JelenaIntensive exploitation and processing of copper ore in the area of Bor District has led to the degradation of large areas of land and the deposition of large amounts of solid waste (mining overburden and waste dumps, flotation tailings, smelter slag). The characteristic of these wastes is that they contain significant amounts of copper and other elements, but also permanently lead to soil, water and air pollution. The paper shows photos of the evolution of the appearance of mine solid waste landfills and provides data on sanation and recultivation and a plan for further activities. Conceptual solutions for sanation degraded areas created by hundred years of mining in Bor were also given.Item Potential application of mullein leaf as biosorbent for efficient biosorption of CU(II) ions from synthetic solutions(The Academy of Applied Technical Studies Belgrade, 2023) Nujkić, Maja; Tasić, Žaklina; Stanković, Sonja; Medić, Dragana; Milić, Snežana; Nedelkovski, VladanIn this study, the potential of mullein leaf (Verbascum Thapsus) as a ground powder for the biosorption of Cu(II) ions from synthetic solutions was examined. Several factors affecting the biosorption efficiency of mullein leaf powder were investigated, including the initial Cu(II) concentration (25–400 mg L−1), solution pH (3–7), contact time (10–120 min.), and biosorbent dosage (2–20 g L−1). The concentration of Cu(II) ions before and after biosorption using inductively coupled plasma optical emission spectrometer was determined. The biosorption efficiency of 58.74% was observed at a biosorbent dosage of 20 g L−1 and an initial Cu(II) concentration of 100 mg L−1. Also, the good biosorption efficiency of 50.74% Cu(II) was reached at a contact time of 90 min. The optimal solution pH was determined to be 4, but the highest removal efficiency of 64.27% for Cu(II) was determined at pH=7. Thus, mullein leaf shows the potential of a cost-effective biosorbent for wastewater treatment, but further investigation of modified mullein will be applied.Item Impact of digital marketing on sustainable business – case of the Unilever company(Society of Economists "Ekonomika", Niš, 2023) Jevtić, Adrijana; Milovanović, GoranDigital marketing, placed on the application of the Internet and digital tools, is one of the means to achieve business sustainability, as well as competitive advantages in the market. This paper presents the basis of the concept of digital marketing, as a new phase in the development of marketing, and its connection with the concept of sustainability. This paper aims to point out how much impact digital marketing can have on business sustainability and the creation of positive business outcomes, shown through the example of Unilever and its Dove brand. The paper analyses the digital marketing activities that this company has undertaken in the development of its Dove brand, which has resulted in its successful positioning in the market, as a brand that is sustainable and socially responsible on the one hand, and profitable on the other.Item Stock price prediction of the largest automotive competitors based on the Monte Carlo method(University of Niš, Faculty of Economics, 2023) Novićević Čečević, Bojana ; Antić, Ljilja; Jevtić, AdrijanaThe transition to electric vehicles would be a great improvement for the population. On the other hand, this transition will make a great pressure for companies in the automotive industry, since they would have to develop such vehicles and make them better than traditional ones. Moreover, the transition period can last a long time. In the meantime, fossil fuel car sale rates are still dominant in the world. In this paper, the stock price prediction is made for two of the world s largest competitors in automotive industry - Toyota and General Motors. The prediction covers one year, based on historical data of stock price trends using Monte Carlo simulation in two possible cases: the first, with 1,000 outcomes, and the second, with 10,000 outcomes. After price simulation, a comparative analysis of the results obtained for these two companies follows. The results show that the greater the number of outcomes specified in the prediction, the greater the variability of the results compared to the variability of historical data. In other words, the transition of General Motors to the leading position is not impossible.Item Evnironmental performance classification of Balkan countries based on TOPSIS-Sort methodology(University of Belgrade, Technical Faculty in Bor, 2022) Radić, Aleksandra; Voza, Danijela; Nikolić, Đorđe; Vuković, MilovanThis paper analyzes the values of the Environmental Performance Index (EPI) in 2020 for the Balkan countries. The aim of the research is to use the TOPSIS-Sort methodology, based on a sample of ten countries, in order to classify them into those with acceptable (Class 1) and those with less acceptable (Class 2) EPI values in the field of environmental policy. A sorting procedure has been realized in relation to the reference value determined in accordance with the data of countries. In addition, a sensitivity analysis was performed by changing the benchmark used to classify countries. The results of the conducted analyzes show that under strict criteria for the formation of Class 1, no country can be classified in the class of belonging. Only during the conducted sensitivity analysis and less strict formation of Class 1 do the countries join the belonging class. Greece and Slovenia are the first to be classified in Class 1.Item Ecoturism as a form of green economy(University of Belgrade, Technical Faculty in Bor, 2022) Riznić, Dejan; Fedajev, Aleksandra; Jevtić, AdrijanaIntensive technological development has led to significant changes in the structure of tourist supply and demand. So today the concept of sustainable tourism development dominates, which means the development of tourism that meets the needs of current tourists, tourist destinations and all participants in tourism, while preserving and increasing the potential for future tourism resources, without compromising the ability of future generations to meet their own needs. The critical question of sustainable tourism is how to turn sustainable development into practice in all tourism activities - from mass to nature tourism and special forms of tourism. We identify ecotourism as a chance to improve tourism in many destinations. Ecotourism is one component of sustainable tourism that can play a significant role in preserving a particular destination’s natural and anthropogenic values. As a new form of touristic offer, ecotourism is an environmentally responsible tourist trip that shows specific areas to stay and enjoy nature. Today, in the world of eco-tourism, it is increasingly becoming a global phenomenon that includes not only movements related to staying in certain tourist facilities but also various adventure trips.Item Impact of the mining activities in the Golija Nature Park areas situated on the territory of Raška Municipality(University of Belgrade, Technical Faculty in Bor, 2022) Ranđelović, Dragana; Pantović, RadojeTraces of present or former mining activity in the Golija Nature Park areas situated on the territory of Raška Municipality are assessed and analyzed in terms of their impact on the environment and possibilities for remediation and reclamation. Active dolomite quarry “Lokve”, closed magnesite mine „Trnava“,tunnel Brvenica – Trnava, scheelite deposit and undermining excavation site Jurija and other exploitation sites have left consequences to the environment, including localized pollution, altered hydrological regime and landscape degradation and fragmentation. Remediation scope, activities and types differ depending upon the exploitation and exploration methods, and include biotechnological approaches as well as contemporary category of mining geoheritage preservation.Item Environmentally safe corrosion inhibitors: amino acids(University of Belgrade, Technical Faculty in Bor, 2022) Radovanović, Milan; Antonijević, MilanCopper, brass, aluminum and steel are considerably used in many industries due to their good electrical and mechanical properties. Most industrial environments are highly aggressive and corrosive for metals and alloys which leads to their decay during use. This further leads to operating problems which can cause a partial or total shutdown of the process. Stoppage of the process for even a short time causes economic and financial losses. Due to high economic losses, protection from corrosion is the focus of many industries as well as scientific research. The use of different compounds which possess characteristics of the inhibitor is extensively examined over the years. Most compounds that show good inhibition efficiency are toxic and considered environmental pollutants. In recent years demands for environmental protection are high which lead to needing for finding new environmentally safe inhibitors of corrosion of metals and alloys. Amino acids are cheap for production, highly soluble in water, and can be produced in high purity. Amino acids also contain heteroatoms in their structure which makes them almost ideal candidates for green corrosion inhibitors in different aggressive solutions. Different amino acids were tested as corrosion inhibitors in many aggressive mediums and showed good results in inhibition efficiency. The action mechanism of amino acids is based on the adsorption of molecules of amino acids on the metal surface and the formation of the protective film which prevents further dissolution of metals. Often, amino acids react with metal ions through coordinative bonds and form complexes that protect the surface of the metal. Also, amino acids in combination with other compounds manifest a synergistic effect. The synergistic effect is detected in the combination of two amino acids and in the combination of amino acids and surfactants. Surfactants provide better adsorption of the molecules of the amino acids on the metal surface and lead to higher inhibition efficiencyItem Investment projects evaluation in a fuzzy environment using the Simplified WISP method(University of Belgrade, Technical Faculty in Bor, 2023) Stanujkić, Dragiša; Fedajev, Aleksandra; Santos, MarcosThis paper examines the importance of investment activity for companies and the challenges they face when evaluating investment projects in a fuzzy environment, that is when decisions have to be made based on some predictions and uncertain or imprecise data. The study focuses on the usage of a new extension of the Simplified WISP (Weighted Sum Product) method, which allows the use of triangular fuzzy numbers, as a tool for evaluating investment projects and minimizing the risk associated with such decisions. Investment projects were evaluated based on the following criteria: Net Present Value, Internal Rate of Return, Profitability Index, Payback Period, and Risk of project failure. The proposed extension of the Simplified WISP method can be used to solve other complex decision problems associated with predictions and uncertainties. The paper highlights the benefits of using this MCDM technique in investment project evaluation and the potential to improve decision-making processes. The study also discusses the challenges associated with applying MCDM techniques in a fuzzy environment and proposes solutions to overcome them. It also provides valuable insights for academics, practitioners, and policymakers interested in investment evaluation and decision-making processes.Item Analysis of the project-based organizations' characteristics influence on project management performance(University of Belgrade, Technical Faculty in Bor, 2023) Milijić, Nenad; Jovanović, Ivan; Radić, AleksandraThis paper presents the empirical results of the analysis of the project-based organizations' characteristics influence on project management performance, that is, on the effectiveness of project goals achieving. As a basis, it was used a multidimensional approach to project success assessment, through project management performance analysis, which emphasizes meeting the expectations of all stakeholders. The broader approach was chosen as a more comprehensive way of solving problems in the project environment in the current crisis and changing circumstances. The research was conducted in 11 project-based organizations operating in various industrial sectors on the territory of the Republic of Serbia. A total of 253 employees were surveyed (project managers, production workers, and workers indirectly related to production). Statistical analysis of collected data was performed using the SPSS 18.0 software package. The mentioned impact was tested using the Multivariate analysis of variance (MANOVA) and it was found that project-based organizations' characteristics have a significant influence on project management performance.