Претрага
2748 items
-
VENTEX: An Expert System for Mine Ventilation Systems Analysis
Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...... VentMode1-4 Figure 2. Modified OOA model of the mine ventilation state evaluation The VENTEX knowledge base is a formalization of the mine ventilation expert’s knowledge. Knowledge in expert systems basically consists of facts and heuristics which can be represented by means of rules, frames, semantic ...
... slot is shown. It represents an attribute of the Diagonals class, namely the ratio of the number of diagonals to the total number of branches. Figure 6. The Diagonals:Delta Slot Besides the usual slot facets such as type, min- max value and cardinality the slot features a call for ...
... by means of the goal editor as shown on /Fig. 9/. The goals in VENTEX pertain to estimation of different parameter values. A decomposition of the goal VentNetwork into subgoals is illustrated in /Fig. 9/. Figure 9. The VentNetwork Goal Goals can also be generated and modified within ...Ranka Stanković, Nikola Lilić, Ivan Obradović. "VENTEX: An Expert System for Mine Ventilation Systems Analysis" in YU Info '96 Brezovica, Društvo za informacione sisteme i računarske mreže (1996)
-
How active is recent tectonics in the central Balkans: Evidence from the Serbian Carpatho-Balkanides
Ana Mladenović (2022)Since the Late Cretaceous, after closure of the Neotethys ocean, tectonic processes in the central Balkan Peninsula were mainly controlled by the mutual interaction of the Adriatic and the Eurasian plates, and tectonic units in-between. Most of the tectonic structures that have been active during Cenozoic times were inherited from previous tectonic stages under different tectonic regimes. Tectonic activity within the Carpatho-Balkan orogen in eastern Serbia since Miocene is conditioned by the existence of the rigid Moesian promontory east ...Ana Mladenović. "How active is recent tectonics in the central Balkans: Evidence from the Serbian Carpatho-Balkanides" in 15th Emile Argand Conference on Alpine Geological Studies, 12-14 September 2022, Ljubljana, Slovenia, University of Ljubljana, Faculty of Natural Sciences and Engineering (2022)
-
The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>
The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...... (different pH, enzyme/substrate ratio). The obtained PEPSIN Figure 7. Native PAGE electrophoregram of pepsin (upper) and haemoglobin (lower) without and in a presence of 1, 5 and 1OmM Al *at pH 2. activation probably is consequence of changes in conformation of enzyme molecule induced by bonded ...
... Kinetic analysis was carried out according to a slightly modified method of Anson [26], by following the initial velocity of the enzymatic reaction in the absence and presence of AU?(1.7-·10 "-8.7·:10 *~M) and increasing concentrations of haemoglobin (0.025— 4·:10 *M). All the assays were performed ...
... Tang J. Primary structure of porcine pepsin. III. Amino acid sequence of a cyanogens bromide fragment, CB2A, and the complete structure of porcine pepsin. J Biol Chem 1975;250:5082—5088. 7] Sielecki AR, Fedorov AA, Boodho A, Andreeva A, James MNG. Molecular and crystal structures of monoclinic ...Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić. "The influence of Al3+ion on porcine pepsin activityin vitro" in Journal of Enzyme Inhibition and Medicinal Chemistry, Informa UK Limited (2008). https://doi.org/10.1080/14756360701841095
-
Assessments of effects of implementation of strategic plans for development of Belgrade District heating system
The district heating system (DHS) is one of the key elements of the Belgrade energy system. Overview of the current state and basic characteristics of the DHS are presented in this paper. The focus is on the planned development of DHS and on the analyses of effects of realization of measures and projects defined by strategic documents related to DHS which are adopted by city authorities (Development Strategy of DHS and Strategy of Belgrade Development). Two exploratory scenarios were ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Miodrag Grujić. "Assessments of effects of implementation of strategic plans for development of Belgrade District heating system" in Sustainable Cities and Society, Elsevier BV (2020). https://doi.org/10.1016/j.scs.2020.102304
-
Reprint of Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: implication on grindability index
Životić Dragana, Bechtel A., Sachsenhofer R., Gratzer R., Radić D., Obradović M., Stojanović Ksenija (2015)Životić Dragana, Bechtel A., Sachsenhofer R., Gratzer R., Radić D., Obradović M., Stojanović Ksenija. "Reprint of Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: implication on grindability index" in International Journal of Coal Geology 157, Amsterdam, Netherlands:Elsevier BV (2015): 165-183. https://doi.org/10.1016/j.coal.2014.07.004
-
Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications
The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...... origin of the carrier of the remanence, which is hematite. The secondary origin of the hematite is doc- umented by sedimentological and paleontological investi- gations, which identified iron sulphide inside the chambers of the microfossils in the whitish limestone at locality 6, a primary mineral ...
... rocks in Serbia. PhD thesis, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia, 299 pp. (in Serbian). Karamata, S. (2006). The geological development of the Balkan Peninsula related to the approach, collision and compression of Gondwana and Eurasian units. In A.H.F Robertson & ...
... was solely based on estimates of Miocene compression (Alps and Carpathians) and extension (Pannonian basin) in the Alps-Carpathians-Dinarides system. According the cited study this differential rotation is clearly related to the opening of the Pannonian basin. Matenco and Radivojević (2012; their ...Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov. "Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications" in Swiss Journal of Geosciences, Basel : Springer International Publishing (2018). https://doi.org/10.1007/s00015-018-0321-8
-
Analysis and Calculation of MMRS and Primary Gas Distribution Network in Urban Environment – Case Study Kučevo
Aleksandar Madžarević, Pavle Janković (2022)Oblast primene prirodnog gasa je veoma široka. Kao energent može se koristiti za proizvodnju energije u elektranama, toplanama i postrojenjima za kombinovanu proizvodnju energije ili za zadovoljavanje različitih toplotnih potreba u industriji i širokoj potrošnji. Gas se može upotrebiti i kao sirovina u hemijskoj i petrohemijskoj industriji, a tokom poslednjih decenija nalazi primenu i u saobraćaju kao pogonsko gorivo u SUS motorima. Sa ekološkog stanovišta, prirodni gas predstavlja najprihvatljiviji izvor energije u poređenju sa drugim fosilnim gorivima. Pri sagorevanju ...Aleksandar Madžarević, Pavle Janković. "Analysis and Calculation of MMRS and Primary Gas Distribution Network in Urban Environment – Case Study Kučevo" in Međunarodni Kongres o procesnoj industriji - PROCESING '22, Beograd : SMEITS, Društvo za procesnu tehniku (2022)
-
Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: implication on grindability index
Životić Dragana, Bechtel Achim, Sachsenhofer Rainhard, Gratzer Rainhard, Radić Dejan, Obradović Marko, Stojanović Ksenija (2014)Životić Dragana, Bechtel Achim, Sachsenhofer Rainhard, Gratzer Rainhard, Radić Dejan, Obradović Marko, Stojanović Ksenija. "Petrological and organic geochemical properties of lignite from the Kolubara and Kostolac basins, Serbia: implication on grindability index" in International Journal of Coal Geology no. 131, Amsterdam, Netherlands:Elsevier BV (2014): 344-362. https://doi.org/10.1016/j.coal.2014.07.004
-
Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeFen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic. "Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8452-4
-
Primary crusher site selection in open pit mines - case study in Sungun copper mine
Facility site selection, (such as Primary or in pit Crusher location) is one of the most important steps in mine de-sign process that has a significant impact on economy of the mining operation. This study covers an attempt to find the optimal location forprimary crusher in order to support the expansion of Sungun copper mine, which is the second largest open pit mine in Iran. Recent exploration drilling has led to a considerable increase in the ore reserve. Therefore, ...Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Mehdi Rahmanpou. "Primary crusher site selection in open pit mines - case study in Sungun copper mine" in Underground mining engineering, Универзитет у Београду, Рударско-геолошки факултет (2021)
-
Constitutive Model for Analysis of Long-Term Municipal Solid Waste Landfill Settlement
Irena Basarić Ikodinović, Dragoslav Rakić, Mirjana Vukićević, Sanja Jocković, Jovana Janković Pantić (2022)Large long-term settlement occurs at the municipal solid waste landfills over an extended period of time which may lead to breakage of the geomembrane, damage of the cover systems, other protective systems or facilities constructed on top of a landfill. Also, municipal solid waste is an extremely heterogeneous material and its properties vary over location and time within a landfill. These material characteristics require the formulation of a new constitutive model to predict the long-term settlement of municipal solid ...Irena Basarić Ikodinović, Dragoslav Rakić, Mirjana Vukićević, Sanja Jocković, Jovana Janković Pantić. "Constitutive Model for Analysis of Long-Term Municipal Solid Waste Landfill Settlement" in ICEG 2022: International Conference on Environmental Geotechnics, World Academy of Science, Engineering and Technology (2022)
-
Effects of Energy Production and Consumption on Air Pollution in Serbia
Marija Živković (2019)Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...... increased number of inhabitants and growth of life standard 1. Much of the world's energy is currently produced and consumed in ways that could not be considered as sustainable 2. Primary energy consumption in the world is characterized with a constant growth and the dominant share of fossil fuels of 79.7% 3 ...
... 6%. Fossil fuels and biomass make more than 85% of the primary energy need to be transformed to heat and/or electricity through combustion processes 3, which are the main sources of atmospheric pollution 4. The need to control atmospheric emissions of greenhouse and other gases and substances leads to ...
... human health, behind high blood pressure, dietary risks and smoking 4. Poverty and fossil fuel-intensive development and urbanization are determined as the main causes of air pollution 4. Emissions can be quantified at the level of total primary energy consumption, transformation or final energy consumption ...Marija Živković. "Effects of Energy Production and Consumption on Air Pollution in Serbia" in Mining and Environmental Protection-MEP 2019, University of Belgrade, Faculty of Mining and Geology (2019)
-
Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)
Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić (2019)Liubov G. Bragina, Nikita Yu. Bragin, Ludmila F. Kopayevich, Nevenka Đerić, Nataša Gerzina Spajić. "Stratigraphy and microfossils (radiolarians and planktonic foraminifers) of the Upper Cretaceous (upper Santonian–lower Campanian) Struganik limestone (Western Serbia)" in Palaeoworld, Elsevier BV (2019). https://doi.org/10.1016/j.palwor.2019.05.001
-
Hibridni sistem za planiranje i analizu ventilacije rudnika
... notacija Index About the book individual workplace locations, often with a very complex geometry. The application of CFD software improves the reliability and quality of the apprehension and verification of air amounts needed for the ventilation of workplaces. Beforehand, determination of air amounts ...
... Kako koristiti elektronsku knjigu? Sadržaj knjige UML notacija Index About the book 9. BRUNNER D.J., MICLEA P.C., McKINNEY D., MATHUR S., "Examples of the application of CFD simulation to mine and tunnel ventilation", Proc. of the 7th US Mine Ventilation Symposium, SME Littleton, Colorado, pp ...
... Kako koristiti elektronsku knjigu? Sadržaj knjige UML notacija Index About the book 29. GREUER R. E., “Real-time precalculation of the distribution of combustion product and other contaminations in the ventilation system of mines, U: S. Bur. Mines Mineral Research Contact Rep. J0285002, (1981) ...Nikola Lilić, Ranka Stanković, Ivan Obradović. Hibridni sistem za planiranje i analizu ventilacije rudnika, Rudarsko-geološki fakultet, Univerzitet u Beogradu, 2000
-
Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia
Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology... Unit -——— Late Jurassic obduction Sediments of ths passive margin of Adria (Jurassc) Sediments of th» passive margin of Adria (Pz anc T) o -—— Pre-Senonian thrusting Fig. 1. a, Main tectonic units in the central part of Balkan Peninsula {modified after BRAGIN et al., 2018); b, Simplified geologic ...
... difficult to reconstruct primary strati- graphical relationships ofthese deposits without bios- tratigraphic control. Biostratigraphy of the Grivska Formation can be based only on microfauna; any macrofossils are unknown here. SUDAR [1986, 1996) distinguished Ladinian, Carnian and Norian cherty ...
... calcite veins and with common lay- ers and nodules of white and pink cherts. Thin-platy limestones (with thickness of layers less than 10 cm) are predominant, while the beds with thickness of more than 0.5 m are represented by massive grey lime- Table 1. Presence and abundance of radiolarian ...Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić. "Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia" in Geološki anali Balkanskoga poluostrva (2019). https://doi.org/10.2298/GABP1901017B
-
The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia
... Di/(Di+Tri) ratio < 0.5 (Bechtel et al., 2003) suggests a greater contribution of angiosperms. The contents of C27 and C29 n-alkanes in relation to C31 and C33 homologues imply similar impact of forested and reed-mire vegetation. The presence of tricyclic (abietane, pimarane, isopimarane) and tetracyclic ...
... tricyclic diterpanes ratio and non-hopanoid triterpenoids content, as well as by lower content of total hopenes (particularly those with double bond at 13(18)-position) and fernenes in the latter one. Mentioned results indicate decreasing contribution of Cupressaceae and emergent macrophytes ...
... pronounced variations of biomarker signatures than Lower Miocene samples, most probably due to the more pronounced fluctuation of water-level and/or palaeo-wildfires. The main differences between Middle and Lower Miocene coals are expressed by higher dehydroicetexane content, Paq index, the tetracycl ...I. Kojic, J. Kus, D. Zivotic, K. Stojanovic. "The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia" in 30th International Meeting on Organic Geochemistry (IMOG 2021), European Association of Geoscientists & Engineers (2021). https://doi.org/10.3997/2214-4609.202134092
-
Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija
Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)... is the ratio of the consistency index (CI) and random index (RI), according to Equation (5): CR = CI RI (5) Random index (RI) depends on the matrix row, and is taken from Table 6, in which the first row is compared to the matrix row, and the second row is composed of RI. Table 6. Random Index (RI) ...
... surrounding ecosystem. Because of its primary purpose which is excavation and processing of mineral resources, MMCC “Trepča” should be more focused on increased concern about environmental protection. MMCC “Trepca” is required to identify and to abide legal requirements of its activity concerning environmental ...
... Polje 0.0723 has the minimum value. For criterion C10—maintenance of tailings—all five tailings have identical value which is 0.2. Table 9. Display of maximum values of comparison matrix (λmax), consistency index (CI), random index (RI) and consistency rate (CR) for analyzed tailing ponds. P C C1 C2 C3 ...Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić. "Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija" in Energies, MDPI AG (2016). https://doi.org/10.3390/en9110935
-
An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)
N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero. "An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)" in Palaeogeography, Palaeoclimatology, Palaeoecology, Elsevier BV (2020). https://doi.org/10.1016/j.palaeo.2020.110145
-
Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining
Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)... calculated matrix and is defined using Equation (4) while n is the number of analysed objects. λmax = 1 n n∑ i=1 λi (4) The Consistency Ratio (CR) is defined using the following equation: CR = CI RI (5) where RI is the Random Consistency Index (Table 3) which depends on the number of analysed objects ...
... calculated matrix and is defined using Equation (4) while n is the number of analysed objects. n max i i=1 1λ = λ n (4) The Consistency Ratio (CR) is defined using the following equation: CICR= RI (5) where RI is the Random Consistency Index (Table 3) which depends on the number of analysed objects ...
... Table 3. The values of the Random Consistency Index (RI) (Saaty, 1991). n 1 2 3 4 5 6 7 8 9 10 RI 0.00 0.00 0.52 0.89 1.11 1.25 1.35 1.40 1.45 1.49 In order for the method to be correct one condition must be fulfilled. The result of the calculated value of the Consistency Ratio when it comes to consistency ...Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović . "Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining" in Energies, MDPI (2019). https://doi.org/https://doi.org/10.3390/en12122245
-
Fluid inclusion study in quartz of the Rudnik Pb-Zn-Cu-Ag skarn deposit, Serbia
Six types of fluid inclusions were identified in three growth zones of hydrothermal quartz from the Rudnik skarn deposit. In the core zone, primary two-phase fluid inclusions of high (type 1) and moderate salinity (type 2) homogenized to liquid between 350-430 °C and 340-420 °C, respectively. Raman analysis revealed that the vapour phases are a CO2-CH4 gas mixture, with a predominance of CO2. The core contains and dispersed vapour-rich fluid inclusions of low salinity (type 3) composed of CO2-CH4-H2S ...Stefan Petrović, Ronald J. Bakker, Vladica Cvetković, Rade Jelenković. "Fluid inclusion study in quartz of the Rudnik Pb-Zn-Cu-Ag skarn deposit, Serbia" in Mineral Resources in a Changing World-17th SGA Biennial Meeting, Zurich, between 28th August and 1st September 2023, Genéve : Society for Geology Applied to Mineral Deposits (2023)