Претрага
430 items
-
A tool for identifying the criticality in the disordered systems with metastable dynamics
Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević. "A tool for identifying the criticality in the disordered systems with metastable dynamics" in Physica A: Statistical Mechanics and its Applications, Elsevier BV (2021). https://doi.org/10.1016/j.physa.2021.125883
-
An Integrated Environment for Management and Exploitation of Linguistic Resources
Ranka Stanković, Ivan Obradović (2009)... During 2007 the Ministry supported 28 projects within various institutions aimed at gathering the necessary geological data. GeolISS is now a standard tool for han- dling spatial data in all projects funded by the Ministry. Bearing in mind the vast amount of textual data in Ge- olISS (observations ...
... data is envisaged that will improve search results in various GIS databases. Besides the conversions already implemented, conversion to other standard formats, such as MULTEXT-east, DCR (Data Category Registry) or MAF (Morphological Annota- tion Framework) are also anticipated. The impl ...Ranka Stanković, Ivan Obradović. "An Integrated Environment for Management and Exploitation of Linguistic Resources" in Proceedings of the International Multiconference on Computer Science and Information Technology, Computational Linguistics – Applications Workshop (CLA09), Mrągowo, Poland, October 2009, Piscataway : IEEE (2009)
-
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 ...... samples over silica gel over night and heating during 2 hours at 100%C. For infrared spectroscopy, the samples were prepared in the form of standard potassium bromide (KBr) pallet (the ratio between pepsin and KBr and pepsin – AP? and KBr were 1:100); the pallets of haemoglobin samples in KBr ...
... l analysis Graphs were plotted by using Microcal Origin program (version 6.1). Values including Ks, Vnas= Kos» KnA» KAa, and Aaso and their standard errors are presented as means + SEM (obtained by the linear regression analysis). The statistical comparisons were performed by Students t-test ...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
-
Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone
Aleksandar Luković (2021)Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...... dobijeni na SEM-EDS sistemu. Redukcija podataka kao i odstupanje od standarda (drift correction) obavljeno je upotrebom SILLS programa zasnovanom na MatLab-u (Guillong et al., 2008). Tokom snimanja standard BCR-2G (Basal glass standard) analiziran je nekoliko puta. Vrednosti koncetracija mikroelemenata ...
... korišćen je EDS sistem uz upotrebu unutrašnjih standarda i napona od 20 kV, dok je za pojedine precizne analize magnetita i hemoilmenita korišćen WDS, sa uslovima snimanja – napon 25 kV i jačina struje 16 nA. Pritom su korišćeni sledeći spoljašnji standardi i analitičke linije: Fe (Fe Kα), TiO2 (Ti Kα) ...
... 2014; Oeser et al., 2014). Širina laserskog snopa iznosila je 60 µm za standarde, dok je za uzorke upotrebljavana promenjiva širina od 20–40 µm u zavisnosti od potrebe. Repetitivna frekvencija lasera iznosila je 20 Hz za standarde i 30–60 Hz sa uzorke u zavisnosti od širine laserskog snopa. Uzorak koji ...Aleksandar Luković. Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone, Beograd : [A. Luković], 2021
-
Испитивање магнетске сусцептибилности прашине антропогеног порекла
... i vrste raka povezanog sa hormonima kao što su rak prostate i rak dojke. Tokom poslednjih decenija primenjene su brojne mere i uvedeni su standardi kvaliteta vazduha u zakonodavstvu Evropske unije sa ciljem smanjenja koncentracije čestica u vazduhu i njihovog uticaja na ljudsko zdravlje i životnu ...Дубравка Новичић, Весна Цветков, Весна Дамњановић. "Испитивање магнетске сусцептибилности прашине антропогеног порекла" in VII Меморијални научни скуп из заштите животне средине доцент др Милена Далмација Нови Сад, 01-02. април 2019, Природно-математички факултет, Департман за хемију, биохемију и заштиту животне средине (2019)
-
Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes
... implementation of the standard ISO 31000:2009, would allow the establishment of internationally acceptable principles, which are also based on quality management guidelines (PDCA (Plan, Do, Check, Act)) [31]. Application of risk management procedures based on the implementation of the standard ISO 31000 for ...
... tion of the standard ISO 31000:2009, would allow the establishment of internationally acceptable principles, which are also based on quality management guidelines (PDCA (Plan, Do, Check, Act)) [31]. Application of risk management procedures based on the implementation of the standard ISO 31000 for ...Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović . "Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes" in Energies (2016). https://doi.org/https://doi.org/10.3390/en9121071
-
A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)
Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenikaGordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević. "A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)" in Marine and Petroleum Geology, Elsevier BV (2021). https://doi.org/10.1016/j.marpetgeo.2021.105383
-
Osnovi hidrogeologije
Petar Dokmanović (2021)... sastav, usvoji kao standard/referenca, na osnovu koga se sadržaj D i 18O, u prirodnim vodama, izražava u relativnim jedinicama. Pun naziv ovog standarda bio je (eng.) Standard Mean Ocean Water ili, skraćeno, SMOW [5]. Od 1967. godine, na osnovu novijih statističkih podataka, ovaj standard je „rekalibrisan“ ...
... sociologija - u kontekstu globalno izraženog trenda deficita pijaćih voda, koje predstavljaju jedan od suštinskih socio-ekonomskih parametara životnog standarda ljudi - ekonomija - u kontekstu realnog/tržišnog vrednovanja resursa PV za različite namene - IT – iz kojih proističu „alati“ za potrebe: sortiranja ...
... sedimentacije (hidrometrisanja). Metoda prosejavanja se primenjuje kod krupnozrnijih stena, prečnika zrna većih od 0.06 mm ili 0.1mm, zavisno od standarda laboratorija. Za prosejavanje se upotrebljavaju sita sa otvorima standardizovanih veličina, koja su poređana tako da, najviša mesta zauzimaju sita ...Petar Dokmanović. Osnovi hidrogeologije, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2021
-
Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation
kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje... random walk noise in integrated Lagrangian displacements (Stanier et al. 2016). The standard deviation of the integrated displacement error grows by σu = √ nσui , with n the number of epochs and σui the standard deviation of the incremental displacement error. PIV displacement errors are larger for ...
... zero. Similarly, the finite stretch is again semi-normally distributed, where its standard deviation increases in time by approximately √ n. In this region we find that the incremental strain has σǫi ≈ 6 × 10−3, the standard deviation of the finite stretch error increases to σ V ≈ 5 × 10−2 at the end ...
... cumulative, finite deformation, various strain tensors have been developed, and we discuss what strain measure best describes large shape changes, as standard infinitesimal strain tensors no longer apply for large deformation. PIV or comparable techniques have become a common method to determine strain ...Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer. "Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation" in Geophysical Journal International, Oxford University Press (OUP) (2021). https://doi.org/10.1093/gji/ggab120
-
A WebGIS Decision Support System for Management of Abandoned Mines
Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)... (OGC) is the main international and industrial organization for standardization in the field of geospatial data. Web Map Service (WMS) is an OGC standard and at the same time the most popular and most widely used OGC Web service which specifies the communication between unrelated programs when sending ...
... client can send a request to view a map from a server. This cartographic web service produces maps of georeferenced data by drawing them in the standard format for images (PNG, GIF, JPEG...) and publishes them via the Web [26]. Web Feature Service (WFS) enables communication at the level of the class ...Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis. "A WebGIS Decision Support System for Management of Abandoned Mines" in Energies 7 no. 9 (2016): 567. https://doi.org/10.3390/en9070567
-
Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
-
Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive
Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2011)... prirodnih izvorskih voda u proteklih nekoliko godina, očigledan je trend porasta kod prirodnih izvorskih voda. Flaširane vode su više nego ikad odraz standarda i udobnosti življenja širom sveta. I dok su tržišta >aširanih voda u Evropi de'nisana, kod nas se beleži u poslednjih nekoliko godina značajan rast ...
... prirodnih izvorskih voda u proteklih nekoliko godina, o¢igledan je trend porasta kod prirodnih izvorskih voda. Flasirane vode su vise nego ikad odraz standarda i udobnosti Zivljenja Sirom sveta. I dok su trzista flasiranih voda u Evropi definisana, kod nas se belezi u poslednjih nekoliko godina zna¢ajan rast ...
... Planova upravljanja podslivova reke Tise (završeno 2010) i reke Save (u toku). Usvajanjem Zakona o vodama u 2010.god., Srbija u potpunosti prihvatila standarde, terminologiju i ciljeve koji su sadržani u Evropskoj okvirnoj direktivi za vode. Set podzakonskih akata je pripremljen, a među njima Pravilnik ...Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić. "Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive" in Naših 40 godina, Beograd : Rudarsko-geološki fakultet (2011): 49-77
-
Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija... calculated as follows: d = |∆vi+1 − ∆vi|, i = 1, 2, . . . , (M× N)− 1, (16) Now it is necessary to compute the corresponding average value d and standard deviation σd. The intention is to eliminate the outliers from the sorted data and obtain an average distance value free of distortion. Outliers are ...
... displacement is calculated as follows: d = |Av;41 — Av;|, i=1,2,...,(Mx N)-1, (16) Now it is necessary to compute the corresponding average value d and standard deviation og. The intention is to eliminate the outliers from the sorted data and obtain an average distance value free of distortion. Outliers are ...
... . ,0.1958, and 0.2020. The distance of any two consecutive values is: 0, 0, . . . , 0.0027, . . . ,0.0062. The corresponding average value d and standard deviation σd of obtained distances are: d= 0.0011, σd= 0.0038. The process of elimination of outliers is performed with respect to the following ...Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710
-
Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential
The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти... efficiency of buildings [33]. 2 Values defined for cool-temperate climate in Criteria for the Passive House, EnerPHit and PHI Low Energy Building Standard [34]. Appl. Sci. 2021, 11, 2691 10 of 24 For all six scenarios, energy needs were calculated in accordance with national legisla- tion [33,35] ...
... pursuit of enhanced Appl. Sci. 2021, 11, 2691 22 of 24 energy efficiency might be questionable unless the NZEB (nearly zero-energy buildings) standard is targeted. However, Serbia has not yet established any formal NZEB definition. The abundance of geothermal resources broadens the scope of the ...
... Serbian) Appl. Sci. 2021, 11, 2691 24 of 24 34. Passive House Institute. Criteria for the Passive House, EnerPHit and PHI Low Energy Building Standard; Passive House Institute: Darmstadt, Germany, 2016. 35. Rulebook on Conditions of Content and Manner of Issuing Certificates on Energy Properties ...Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić. "Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential" in Applied Sciences-Basel, МDPI (2021). https://doi.org/10.3390/app11062691
-
GIS Application Improvement with Multilingual Lexical and Terminological Resources
... in GeolISSTerm Further development is underway, as well as concept restructuring and synchronization in compliance with the ISO 1087-1 TMF standard (ISO, 2000). As to the physical (internal) implementation, recommendations of the ISO/TC 37 LMF (ISO, 2008) and ISO 16642 TMF (ISO, 2003) standards ...Ranka Stanković, Ivan Obradović, Olivera Kitanović. "GIS Application Improvement with Multilingual Lexical and Terminological Resources" in Proceedings of the 5th International Conference on Language Resources and Evaluation, LREC 2010, Valetta, Malta, May 2010, Valetta, Malta : European Language Resources Association (2010)
-
Увођење доменских и семантичких маркера за област рударства у српске електронске речнике
... пожара, експлозија, служба спасавања +Transport Транспорт Предложен нови маркер транспортна трака, камион, дампер, хидраулички транспорт, извоз, извозно постројење, самоходно транспортно средство +RockMech Механика стена Предложен нови маркер притисак, смицање, напонско стање, носивост стене ...
... технички пројекат Увођење доменских и семантичких маркера за област рударства 153 Семантички маркери дефинисани су по угледу на EarthResourceML1, стандард за размену дигиталних информација заснован на XML-у за мине- ралне појаве, ресурсе и резерве, потом руднике и рударске активности, као и производњу ...Иван Обрадовић, Александра Томашевић, Ранка Станковић, Биљана Лазић. "Увођење доменских и семантичких маркера за област рударства у српске електронске речнике" in Научни састанак слависта у Вукове дане - Српски језик и његови ресурси: теорија, опис и примене, Београд : Међународни славистички центар на Филолошком факултету, Филолошки факултет (2017). https://doi.org/10.18485/msc.2017.46.3.ch10
-
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 ...... quality of life of citizens. Energy demand in the world has a constant growth, which is driven by 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 ...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)
-
Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature
U datom eksperimentalnom radu su termografskim metodama ispitivane termofizičke karakteristike različitih materijala. Za ispitivanja su izabrani mesingani niovčić, ugalj i pelet, jer imaju različita termoizolaciona svojstava i različito stanje površine. Uzorci su najpre hlađeni, a zatim je njihovo zagrevanje na sobnoj temperaturi praćeno termalnom kamerom. U drugom delu eksperimenta, korišćena je impulsna termografija, a zagrevanje površine uzoraka vršeno je svetlosnom pobudom.Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Katarina Nestorović. "Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature" in 65. godišnja konferencija za elektroniku, telekomunikacije, računarstvo, automatiku i nuklearnu tehniku ETRAN 2021, Etno selo Stanišići, Republika Srpska, 8-10. septembar 2021., Društvo za ETRAN Beograd i Akademska misao Beograd (2021)
-
Development of integrated fuzzy model for mine management optimization
Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)... very importantly, the proposed solution needs to be implemented efectively. The ore excavation process and other mining, activities would thus be standard- ized. This results in efficient mining: as well as higher productivity and market competitiveness. OConclusion. A modern approach to investigations ...Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić. "Development of integrated fuzzy model for mine management optimization" in Comptes rendus de l'Académie Bulgare des Sciences (2023)
-
Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal
Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)... analysis. Stable isotope ratios are reported in delta notation (δ13C) [47] relative to the Vienna-Pee Dee Belemnite (V-PDB) standard (δ13C = [(13C/12C)sample/(13C/12C)standard − 1]). Delta notation is expressed in parts per thousand (‰). The analytical error was better than 0.2 ‰. The analysis was performed ...
... 100% − (yield of liquid pyrolysate + yield of solid residue). All experiments were repeated three times and average yields are reported here with standard deviations less than 0.5%. The experiments were done at the University of Belgrade, Faculty of Chemistry. Polymers 2021, 13, 759 5 of 25 Figure ...
... pyrolysis [48] was performed using TOC/Rock-Eval-6 apparatus (Vinci Technologies, Nanterre, France). The sample aliquot was 7.3–12.8 mg. The IFP 160,000 standard was used for calibration. The programmed heating rate of both the pyrolysis and the oxidation ovens was 25 ◦C/min. Pyrolysis was done in the temperature ...Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759