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Упит dcterms_subject_txt:Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry

2352 items

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... , relations and operations from all three aforementioned classes. For each borehole different analyses are performed (petrographic-mineralogical, physical- mechanical, qualitative, which encompasses technical, elementary analysis, ash analysis and ash fusibility), and lithologic and stratigraphic ...
    ... transformed to the physical model for the ArcGIS development environment, which is being used at the Faculty of Mining and Geology in Belgrade for development of GIS applications. Thematic classes presented in this paper encompass only a part of the data related to mine production, and pertain to an important ...
    ... representation. More precisely, the paper tackles exploration works, sample analysis, infrastructure within the mine and in its environment, excavating and loading equipment, etc. The physical implementation of the OpmGIS geodatabase model has been illustrated by the example of the "Field G" open pit, followed ...

  • Physical properties of hydraulic binders with high amount of fly ash

    Jovanović Ivana, Milošević Vladan, Petrov Milan, Kostović Milena, Miličić Ljiljana, Todorović Dejan (2011)

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... (particle size and particle size distribution), so that the pozzolanic reactivity increases with the specific surface of ash. International standard ASTM C 311 describes the procedures of chemical and physical methods for characterization of fly ash, and standard ASTM C 618 provides chemical and physical ...
    ... system in the ash-binder- water, and the specimens without binders do not contain calcite or it is present in trace, - a change in the chemical composition of the tailings is produced by the presence of inorganic composition that occurs in coal. Samples S1 and S2 contain a smaller amount of silicon ...
    ... modulus of elasticity represents the relationship between stress and deformation. Physical dimension of the modulus is the stress and is expressed in MPa. The experiment was done according to standard EN 13286-43 [20]. 3 Results and discussion 3.1 The chemical composition of fly ash Results ...

  • Overview of the hydrogeological investigations of recently discovered world class deposits in Serbia

    Nebojša Atanacković, Vladimir Živanović, Veselin Dragišić, Sava Magazinović (2019)
    Europe industry has growing concerns on availability of the raw materials. To address this challenge, the European Commission has created a list of critical raw materials for the EU, launched EIT Raw Materials initiative, and continuously support research projects (like INTRAW, UNEXMIN etc.) with the aim of reducing the dependency and meeting growing demands. In the last 15 years Serbia is experiencing new bust in geological exploration of mineral deposits. Currently 167 exploration licenses are active, covering approximately 6000 ...
    Groundwater, Raw materials, Lithium, Mining, Field hydrogeology

  • Shear strength of municipal waste materials from two landfills in Serbia

    Rakić Dragoslav, Čaki Laslo, Ćorić Slobodan (2013)

  • Petrographic study of Beočin zeolite tuff

    Simić Vladimir, Andrić Nevena, Cvetković Vladica, Vuković Nikola, Živanović Jelena (2013)

  • Using gravity data to define structural correlation affecting the formation of Neogene basins

    Snežana Ignjatović, Ivana Vasiljević, Branisav Sretković, Milanka Negovanović (2023)
    A gravity survey can help to define the structural correlation in the study area. The structures that have influenced the development of Neogene basins can be defined using gravity data. By applying mathematical transformations to gravity data, the geological structures (faults, nappes, etc.) that impacted the formation of Neogene basins can be defined. We have taken the part of the Dinarides as the test region. The paper presents the results obtained using the procedure residual, vertical gradient, and total ...
    gravity survey, mathematical transformation, basin

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... Majdanpek open pit we performed experimental investigations on copper ore [17]. The basic physical and mechanical properties of the rock mass were determined on samples in the laboratory. By examining the physical and mechanical properties of the work environment, the following values were obtained: • ...
    ... Serbia, and belongs to Kolubara District. The limestone deposit Nepričava consists of rock masses of sedimentary origin, not entirely homogeneous in composition. Limestones are the most important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and ...
    ... detonation of explosive materials is followed by release of a large amount of energy. Whereby, a greater part of energy is used for rock destruction, and part of energy, in the form of seismic wave, is lost in the rock mass causing rock mass oscillation. Investigations of the character and behavior of the pattern ...

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... “Preparation for entry exam” The learning materials are divided in 13 subsections. Every subsection presents one mathematical theme. Subsections contain a theoretical part and a part with exercises. The theoretical part contains basic axioms, theorems and formulae related to a specific mathematical ...
    ... pedagogical and didactical points of view. Keywords: OER, edX, course, mathematics 1. INTRODUCTION At UNESCO's Forum, in 2002, Open Educational Resources (OERs) have been defined as digitised materials offered freely and openly for educators, students and self- learners to use and reuse for ...
    ... for creating, publishing and using course such as “Preparation for entry exam”. For example, [4]: 1) Improvement of the quality of learning materials through peer review processes and use of modern technology. 2) Innovation in the teaching process, openness and availability with low ...

  • AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters

    Vesna Ristić-Vakanjac, Marina Ćokorilo-Ilić, Petar Papić, Dušan Polomčić, Radisav Golubović (2018)
    Although an invisible component of the hydrologic cycle, groundwater generally takes precedence over other water resources in the area of drinking water supply. Among groundwater resources, karst aquifers tend to be rich in sufficiently-accessible amounts of high-quality water. During most of the year, this water requires only disinfection prior to delivery to the end user. However, in many cases extreme rainfall and/or sudden snow melt results in transient turbidity, increase in bacterial count and temporary contamination (e.g. increase in ...
    autocorrelation, cross-correlation, autoregressive model, cross-regressive model, autocross regressive model, nitrates, Banja Spring, Serbia.

  • Depth geological relations of the wider area of Belgrade - based on the wells and geophysical data

    Đorđe Marinović, Ljupko Rundić (2020)
    Предметна референца обухвата простор шире околине Београда укупне површине око 2.000 km2. Аутори су објединили капиталне геолошке и геофизичке податке обезбеђене површинским истраживањима и мултидисциплинарним елементима из 52 бушотинe са дубинама између 33 и 2.733 m. Конкретни палеонтолошки налази специјализованих аналитичара са детерминацијом макро и микрофауне и флоре, презентовани су како из неогених формација тако и из басенске подине. Осим конвенционалних петролошких описа стена цитиране су и микроскопске детерминације интрузивних и екструзивних магматита. Из затвореног басенског простора корелативно су ...
    неоген, дубинска разграничења, геофизички показатељи, структурно-палеогеографска интерпретација

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...
    coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods

  • Старење бунара у алувијалним срединама различитог степена оксичности

    Brankica Majkić (2013-09-27)
    Старење бунара настаје као последица процеса корозије и колмирања. Процесекорозије могуће је спречити уградњом филтерских конструкција од материјалаотпорних на корозију. Колмирање може да настане без обзира на врсту материјалаод кога се праве бунарске конструкције, а процесом може бити захваћенаприфилтарска зона па и зона саме водоносне средине. Из тог разлога тезa јеусмеренa на процесе који доводе до колмирања бунара и последицe опадањaкапацитета водозахватних објеката. Полазна хипотеза је да бунари стареразличитом брзином у срединама различитог степена оксичности. Хидрохемијскеи микробиолошке карактеристике подземних ...
    старење бунара, алувијалне издани, степен оксичности средине,колмирање, бунарски талог, локални хидраулички губитак, дозвољене улазнебрзине
    ... басена, Задужбина Андрејевић, п.92 126. Stumm, W. and J.J. Morgan (1996): Aquatic Chemistry, Chemical Equilibria and Rates in Natural Waters, 3rd ed. John Wiley & Sons, Inc., New York, 1022p. 127. Stuyfzand PJ (1993) Hydrochemistry and hydrology of the coastal dune area of the Western Netherlands ...
    ... Y. and H.W. Pepenguth (2000): Kinetic modeling of microbial-driven redox chemistry of radionuclides in subsurface environments: coupling transport, microbial and geochemistry www.osti.gov/bridge/servlets/purl/755470-3PElV2/.../755470.pdf 176. Wastal J. (2000): Geochemical equilibrium and int ...
    ... Standard Practices for Sampling Water-Formed Deposits, USA 181. International Union of Pure and Applied Chemistry (1993): Glossary for chemists of terms used in toxicology: Pure and Applied Chemistry, v. 65, no. 9, p. 2003-2122. 182. National Research Council (1994): Alternatives for ground ...

  • A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers

    Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić (2019)
    Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...
    Efikasnost, Fazi zaključivanje, Prikupljanje podataka, Buldozer

  • Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research

    Mirko Petković, Vesna Cvetkov, Branislav Sretenović (2014)
    магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија
    ... Besides iron-based materials, it is very im- portant to have the presence of small amounts of magnetic minerals from the iron oxide and iron sulphide groups, either organic or inorganic in origin, which cause a diff erence in the magnetic susceptibility of archaeological objects and the environment ...
    ... uniformly-arranged coordinates along the x and y axes of the data. KEYWORDS: MAGNETIC SURVEY, ZIGZAG AND PARALLEL ACQUISITION IN WALKING MODE, LINEAR ANOMALIES, ARCHAEOLOGY. INTRODUCTION The diff erences in the physical properties of the subsurface materials are the basic prerequisite for the application ...
    ... The use of iron-based materials during human history allows for the successful application of magnetometry, which is now one of the leading choices of geophysical methods for archaeologi- cal reconnaissance. Archaeology and Science 10 (2014) 94 Petković et al - Advantages and Disadvantages of a ...

  • Spatial and temporal variability of precipitation in Serbia for the period 1961-2020

    Boško Milanović, Phillip Schuster, Milan Radovanović, Vesna Ristić Vakanjac, Shristoph Schneider (2017)
    У овом раду анализиране су месечне, сезонске и годишње суме падавина у Србији за период 1961–2010. Географска ширина, дужина и надморска висина 421 падавинске станице и карактеристике терена у њиховом блиском окружењу (нагиб и аспект терена у радијусу од 10 км око станице) коришћене су за развој регресионог модела на основу којег је прорачуната просторна расподела падавина. Приказан је просторни распоред годишњих, јунских (максималне вредности за скоро све станице) и фебруарских (минималне вредности за скоро све станице) падавина. Годишње ...
    padavine, distribucija godišnjih padavina, distribucija mesečnih padavina, Republika Srbija

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... that can conduct tests in the laboratory and in the field, it allows the comparison of results obtained under different conditions, and the dependence between the parameters can be consid- ered to evaluate the suitability of materials and the compaction and load capacity in road construction. In ...
    ... determined, and the physical-me- chanical parameters are defined based on laboratory testing for incorporation into the substrate layer; – the method of using a non-standardized dynamic California Bearing Ratio (CBR,) device and the defi- nitions of its values under laboratory and field conditions ...
    ... tests revealed that there is good correlation between the field CBR, and the deformation modulus, and dynamic deformation modulus values obtained by field tests. Introduction The compaction and bearing capacity of natural materials are the most important indicators that must be satisfied during ...

  • Geologic Information System of Serbia

    Branislav Blagojević, Branislav Trivić, Ranka Stanković, Nenad Banjac, Olivera Kitanović (2011)
    Geologic information system of Serbia (GeolISS) represents repository for digital archiving, query, retrieving, analysis and geologic data visualization. The GeolISS is implemented through ESRI ArcGIS technology, and is designed to operate as a personal geodatabase (MS Jet 4.0 Engine) and SDE enterprise geodatabase in MS SQL Server. The objective of GeolISS implementation is integration of existing geologic archives, data from published maps at different scales, newly acquired field data, as well as Web publishing of geologic information. Physical implementation ...
    Geologic information system, Conceptual model, Logical model, Implementation, Geodatabase
    ... geologic information. Physical implementation of GeolISS has been guided with conceptual and logical model in those specified the basic kinds of geologic entities of interest and how they are described. The attempt has been influenced by NADM-C1 implementation from USGS and CGS, by GeoSciML interchange ...
    ... Mining and Geology, Đušina 7, 11000 Belgrade, Serbia, e-mail: btrivic@rgf.bg.ac.rs 3 Faculty of Mining and Geology, Đušina 7, 11000 Belgrade, Serbia, e-mail: ranka@rgf.bg.ac.rs 4 Faculty of Mining and Geology, Đušina 7, 11000 Belgrade, Serbia, e-mail: olja@rgf.bg.ac.rs 5 Faculty of Mining and Geology ...
    ... implement field data records and measurements i.e. the basis for classified features, interpretations and models. Any observed property can be expressed as a text, number, picture and geometry (location). Spatial entities are treated as observation localities and mapped/interpreted geologic entities ...

  • Флотабилност халкопирита из полиметаличне руде рудника „Рудник”

    Ђурица Н. Никшић (2022)
    The doctoral dissertation Chalcopyrite flotability from polymetallic "Rudnik" mine ore consists of two parts. The first part is a general part in which the theoretical foundations of the flotation concentration process, the flotation properties of chalcopyrite, the influence of certain flotation reagents and the mechanism of action on the flotation properties of chalcopyrite are presented. This part also describes the process of flotation concentration of polymetallic ore from the "Rudnik" mine. The second part is ...
    Халкопирит, флотацијска концентрација, KAX, NaCN, pH пулпе

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... group, goals and teaching materials. According to Espana-Villegas and Caeiro-Rodriguez (2018) confirm that OER include all types of educational content (complete courses (educational programs), course materials, content modules, learning objects, textbooks, multimedia materials (text, sound, ...
    ... impact on global community is related to file sharing, reuse and appropriate licensing of materials. Serbian educational institutions and also industry subjects made a big effort to develop and use OERs in order to provide new skills and knowledge. Within the BAEKTEL project (baketel.eu) they provided ...
    ... related to knowledge and skills of individuals in the domain of creating and publishing OER and learning through OER. Individuals who create OERs usually learn some new methodology in the process (for example creating MOOC courses) and get skills related to licensing of materials. OER impact on learners ...