Претрага
674 items
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The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments
Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...... abundances of steranes and diasteranes Sample % C27 a % C28 b % C29 c C29αα(S)/ C29αα(S+R)d C29ββ(R)/ C29(ββ(R)+αα(R))e C27βα(S)/ C27(βα(S)+αα(R))f M18 33.2 29.4 37.4 0.49 0.49 0.30 M21 27.4 32.8 39.8 0.48 0.46 0.31 M22 31.8 30.9 37.3 0.49 0.50 0.29 M25 29.3 32.4 38.3 0.48 0.47 0.31 M9 32.2 ...
... Çelikbıçak, Eds., InTech, Rijeka, Croatia, 2012, Ch. 1, p. 3 5. R. A. Bourbonniere, P. A. Meyers, Limnol. Oceanogr. 41 (1996) 352 6. A. Bechtel, R. F. Sachsenhofer, I. Kolcon, R. Gratzer, A. Otto, W. Püttmann, Int. J. Coal Geol. 51 (2002) 31 7. I. R. Kaplan, Y. Galperin, S. Lu, R. Lee, Org. Geochem ...
... Fuel Biomarkers. Applications and Spectra. Elsevier, Amsterdam, 1985, pp. 153, 159–161, 164–169, 229, 246, 250, 253 13. A. Zdravkov, A. Bechtel, R. F. Sachsenhofer, J. Kortenski, R. Gratzer, Org. Geochem. 42 (2011) 237 14. B. Jovančićević, P. Polić, Fresenius Envir. Bull. 10 (2001) 527 15. B. M ...Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević. "The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments" in Journal of Serbian Chemical Society, Beograd : Srpsko hemijsko društvo (2013). https://doi.org/10.2298/JSC130614087S
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Optimising in electrical energy consumption in mining plants
Snežana Aleksandrović, Vesna Damnjanović, Ilija Jeftenić. "Optimising in electrical energy consumption in mining plants" in 17th International Symposium INFOTEH-JAHORINA 2018, Istočno Sarajevo : Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu (2018)
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The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers
One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...... facilities for maintenance. where: T C,=C, +] fadt+C,7, 0 C, — total life cycle costs, C, — ownership costs, C; — specific operational costs per time, f(t) — function of mean time between failures, T —time of machine application. Optimal replacement time is at the moment with minimal cost (Figure 3). ...
... operation) and limiting availability of 0.80. This diagram is shown in Figure 8 [1]. 12 3 1 0,97 0.955 __0.915 0.9I% ___9;905\\ 05 7 —= . 2 | T ф \ 0.722 e 5 0.6 – | : | 0.602 –ј | 5ћапећа! РОЗ20У-1 04 _ | | d О 0.316 | 0.2 - | | | | Џ Џ 0 T T T T T Ц T T T 1.year 2. уеаг ...Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović. "The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers" in 7th International Symposium Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2019)
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Energetska efikasnost elektromotora na površinskim kopovima
Snežana Aleksandrović, Ilija Jeftenić (2023)Snežana Aleksandrović, Ilija Jeftenić. "Energetska efikasnost elektromotora na površinskim kopovima" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023. , Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Допринос одређивању безопасног растојања при извођењу минирања
... HayuHo-crTpyuHui uacorHc Scientific-profesional journal TommHa XXIX, bpoj 40,cenreM6ap 2023.rojm. Year XXIX, Issuc 40, Scptembcer 2023. ycar f\pyuiTBo Vicrpax1B8aHbe TexHonoruje OcHuBau: /fIpyurrBo HH;Keb»epa H TexHHuapa 3pebaHHH MHaynanaun: ZJipymrrBo HH;Kemepa, 3pebbaHHH Bucoka TexHHukKa ...
... T % VcCJOBH H3BOLEba MHHCDpCKHX pajlOBa — 3a KpcuMbaKC KOJH CC HaJa3C Ha OBOJ JokKamjH, a HpeMa Koc(bMIMjeHTy upBpcrohc npema IIporobakoHony (f =7,32), creHcKka Maca cnama y CpcFbC WdBpCTC CTeHC. IIpeMa rpaljeeEHHCKHM HOpMaMa I H-200 a MMXOBOJ KnacH(puKalujH, OBC cTreHc Hpunamajy VI-oj ...Slobodan Trajković, Sanja Bajić, Ivan Krsmanović. "Допринос одређивању безопасног растојања при извођењу минирања" in ДИТ : Друштво истраживање технологије (2023)
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A Lexical Approach to Acronyms and their Definitions
In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.... Sgarbas, and S. Panagiotopoulou, 2014. Acronym identification in Greek legal texts. Literary and Linguistic Computing, 30(3):440–541. Wolinski, F., F. Vichot, and B. Dillet, 1995. Automatic processing of proper names in texts. In Proceedings of the 7th conference on European chapter of the ACL. ...
... manually 21 multiple entries 19 e-dict_MW_forms 9,956 6 corpus 23MW acr. inflects 333 acronyms 987 acr. in masc. 323 acr. in fem. 64 acr. both m&f 35 acr. in plural 2 7 acronyms 987 e-dict_acr_forms 6,946 Table 1: Results of the procedure on our corpus The majority of (acronym, definition) pairs ...Cvetana Krstev, Duško Vitas, Ranka Stanković. "A Lexical Approach to Acronyms and their Definitions" in Proceedings of the 7th Language & Technology Conference, November 27-29, 2015, Poznań, Poland, Springer (2015)
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Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology
Mihailo Škorić, Mauro Dragoni (2019)This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...... forwarded for evaluation. 3 Evaluation and results comparison Test set Taking identifier length into account Precision @10 Average mean Precision Recall F-measure 1 yes 0.58 0.0060 0.0696 0.0108 2 no 0.46 0.0057 0.0648 0.0103 Table 2. Тest sets used for classification and their results. Experiments were ...
... those documents. The annotation used in the evaluation was manually conducted by an expert team. The usual metrics of average mean precision, recal12 and F-measure 11 TREC Clinical Decision Support 2016 (on-line) 12 Relevant documents not included in the ranking were taken as false negatives. Infotheca ...
... of a query. Table 2 shows us that taking the length of the identifier into account yielded a slight improvement in results (5% improved precision and F- measure, 7% improved recall and 12% improved precision@10). Considering the values obtained, it can be immediately noticed that the precision is unusually ...Mihailo Škorić, Mauro Dragoni. "Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology" in Infotheca, Faculty of Philology, University of Belgrade (2019). https://doi.org/10.18485/infotheca.2019.19.1.3
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Surface functional groups and degree of carbonization of selected chars from different processes and feedstock
Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS... operational temperature. Biomass Convers Biorefin. 2021 Feb 4. pii https://doi. org/10.1007/s13399-021-01303-5. Kloss S, Zehetner F, Dellantonio A, Hamid R, Ottner F, Liedtke V, et al. Characterization of slow pyrol- ysis biochars: effects of feedstocks and pyrolysis temperature on biochar properties ...
... publications. - The Repository is available at: www.dr.rgf.bg.ac.rs PLOS ONE -)) Check for updates G OPEN ACCESS Citation: Ilić M, Haegel F-H, Lolić A, Nedić Z, Tosti T, Ignjatović IS, et al. (2022) Surface functional groups and degree of carbonization of selected chars from different ...
... selected chars from different processes and feedstock Marija Ilić!*, Franz-Hubert Haegel(52**, Aleksandar LolićŠ*, Zoran Nedić“t, Tomislav Tostic»*f, Ivana Sredović Ignjatović»**, Andreas Linden**, Nicolai D. Jablonowskifž, Heinrich Hartmann”* 1 Faculty of Mining and Geology, University of Belgrade ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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Supstitucione reakcije Pd(II) kompleksa sa biološki važnim biomolekulima
Aleksandar M. Mijatović, Jovana Bogojeski. "Supstitucione reakcije Pd(II) kompleksa sa biološki važnim biomolekulima" in Hemijski pregled, Srpsko hemijsko društvo (2017)
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Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji
U ovom preglednom radu dat je istorijski pregled razvoja površinske eksploatacije lignita na teritoriji Srbije, uz kratak osvrt na geološki nastanak i kvalitet i rezerve uglja, kao i mogućnosti korišćenja za dalju upotrebu. Kolubarski, Kostolački i Kovinski ugljeni baseni lignita u Srbiji, ne računajući Kosovsko-Metohijski i Drenički u sastavu AP Kosovo i Metohija po Rezoluciji 1244 UN, su ležišta najrasprostranjenijeg uglja - lignita u Srbiji koji se eksploatiše od druge polovine 20. veka na velikom broju površinskih kopova ...Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković. "Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji" in XI Međunarodna konferencija ugalj i kritični mineral CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia
Оливера Крунић (2021)Оливера Крунић. "Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia" in Рационално коришћење земљишта и вода у Србији - Sustainable Use of Land and Water in Serbia- Serbian Academy of Sciences and Arts; Scientific Conferences Volume CXCVII; Department of Chemical and Biological Sciences, Book 19, Српска академија наука и уметности (2021)
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Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils
Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii... 379–387. [CrossRef] 42. Orhan, F.; Gulluce, M. Isolation and characterization of salt-tolerant bacterial strains in salt-affected soils of erzurum, Turkey. Geomicrobiol. J. 2014, 32, 521–529. [CrossRef] 43. Zhang, J.; Xie, L.; Huang, X.; Liang, Z.; Liu, B.; Han, N.; Xing, F.; Deng, X. Enhanced calcite ...
... strains isolated from a limestone cave and from a loamy soil. Geomicrobiol. J. 2003, 20, 85–98. [CrossRef] 2. Jorquera, M.A.; Graether, S.P.; Maruyama, F. Bioprospecting and biotechnology of extremophiles. Front. Bioeng. Biotechnol. 2019, 7, 106. [CrossRef] 3. Bibi, S.; Oualha, M.; Ashfaq, M.Y.; Suleiman ...
... role of bacterial urease and carbonic anhydrase in carbonate mineralization. Appl. Biochem. Biotechnol. 2014, 172, 2552–2561. [CrossRef] 14. Hammes, F.; Boon, N.; Clement, G.; de Villiers, J.; Siciliano, S.D.; Verstraete, W. Molecular, biochemical and ecological characteri- zation of a bio-catalytic ...Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov. "Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils" in Microorganisms, MDPI AG (2021). https://doi.org/10.3390/microorganisms9081691
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Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)
Santonian, Campanian, radiolarians, planktonic foraminifera, biostratigraphy, limestones, Struganik, SerbiaLiubov Bragina, Nikita Bragin, Luidmila Kopaevich, Nevenka Đerić, Nataša Gerzina Spajić. "Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)" in Stratigraphy and Geological Correlation, Pleiades Publishing Ltd (2020). https://doi.org/10.1134/S0869593820010037
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Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin
Joni prelaznih metala u kombinaciji sa različitim ligandima nude veliki broj mogućnosti za ispitivanje potencijalnih bioaktivnosti. Među jonima prelaznih metala, bakar je poznat kao endogeni metal za ljude, sa karakterističnim biološkim redoks aktivnostima i relativno jakim afinitetom za nukleobaze. Kompleksi bakra ispoljavaju svoju antitumornu aktivnost na nekoliko različitih načina, generišu veliku količinu ROS, što uzrokuje oksidativno oštećenje mitohondrija i biomakromolekula. Nađeno je da kompleksi bakra(II) imaju umeren do dobar afinitet vezivanja sa DNK, uglavnom putem interkalacije.Angelina Petrović, Aleksandar Mijatović, Rada Baošić, Jovana Bogojeski. "Interactions of Copper(II) Complexes of some Schiff base ligands with calf thymus DNA and bovine serum albumin" in 6. Konferencija mladih hemičara Srbije, Srpsko hemijsko društvo (2018)
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Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement
Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić,. "Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement" in International scientific conference Challenges in Applied Geology and Geophysics: 100th Anniversary of Applied Geology at AGH University of Science and Technology, Book of abstracts, Kraków, Poland, 10-13. Sep. 2019, Kraków, Poland : AGH University of Science and Technology (2019)
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The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin
Filip Anđelković, Dejan Radivojević (2019)... 2 – reservoir rocks; Formation 3 – seal rocks; Formation 4 – reservoir rocks. References: 1. Balázs, A., Mațenco, L., Magyar, I., Horváth, F., Cloething, S., (2016). The link between tectonics and sedimentation in back-arc basins: New genetic constraints from the analysis of the Pannonian ...Filip Anđelković, Dejan Radivojević. "The correlation of Upper Miocene lithostratigraphic units of the southern part of the Pannonian basin" in Knjiga sažetaka i radova II Kongresa geologa Bosne i Hercegovine, Laktaši BiH, oktobar 2-4, 2019, Udruženje geologa u Bosni i Hercegovini (2019)
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Mineral Resources of Serbia: Environmental, Societal and Economic Challenges
... al Conference on the Occurrence, Properties and Utilization of Natural Zeolites, Belgrade, Serbia, 8-13 June 2014, 217-218. Simić, Vladimir, Abramović, Filip, Andrić, Nevena, Delić, Ivana, Miladinović, Zoran and Životić, Dragana. 2016. Need to Improve the Natural Aggregate Resources Supply in the ...
... (12—13): 1666—70. doi:10.1016/ j.fuel.2006.03.003. Kiss, F. 2006. "Assessment ofthe Economic Feasibility of Biodiesel Production from Oil Crops in Serbia" [in Serbian|. M.Sc. Thesis. Faculty of Agriculture, University of Novi Sad. Kiss, F. E., M. Jovanović, and G. C. Bošković. 2010. “Economic and ...
... Biodiesel Synthesis Using Supported ZnO as Catalyst.” Chemical Engineering and Technology 37 (11): 1879—84. doi:10.1002/ceat.201300714. Martinovic, F. L., F. E. Kiss, R. D. Micic, M. Simikić, and M. D. Tomić. 2018. “Comparative Techno-Economic Analysis of Single-Step and Two-Step Biodiesel Production ...Vladimir Simić, Rade Jelenković, Dragana Životić. "Mineral Resources of Serbia: Environmental, Societal and Economic Challenges" in Serbia: Current Issues and Challenges in the Areas of Natural Resources, Agriculture and Environment,, Nova Science Publishers, Inc. (2019)
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Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems
Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević. "Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems" in Physical Review E, American Physical Society (APS) (2019). https://doi.org/10.1103/PhysRevE.100.032113
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An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System
In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...... TIS following the same approach. REFERENCES Vuković, F. (2005). Razvoj sistema za praćenje i upravljanje troškovima transporta na površinskim kopovima. Ph.D., Belgrade: Faculty of Mining and Geology. Kolonja B., Stanković R., Vuković F. (2000). Production information system of the Pljevlja coal ...Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović. "An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System" in Proceedings of the Fifteenth International Symposium on Mine Planning and Equipment Selection, Torino, Italy, September 2006, Vol. 1,, Balkema (2006)
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Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit
... conditioned by rock mass characteristics and blasting conditions, n — exponent conditioned by characteristics of rock mass and blasting conditions, F — distance from the blasting site to the monitoring point [m], Q - total amount of explosive [kg] . r [] v R - the reduced distance, given in the ...
... linear correlation r, [7] between the logarithms of reduced distances R and logarithms of oscillation velocities y. Coefficient of linear correlation F is also used in order to evaluate the degree of connection between values of obtained parameters n and K for models 1 — 5. Besides, in order to evaluate ...Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac. "Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia, Belgrade : University of Belgrade-Faculty of mining and geology (2023)