Претрага
497 items
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Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)
Howard R. Feldman, Barbara V. Radulović, Fayez Ahmad. "Callovian (Middle Jurassic) Sphriganaria (Brachiopoda) from the Jordan Valley (Middle East)" in Historical Biology (2023). https://doi.org/10.1080/08912963.2022.2122823
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Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog
Maja D. Milošević (2016-12-09)Adsorpciona efikasnost različitih uzoraka glina sa lokaliteta Srbije određenaje njihovim tretiranjem različitim koncentracijama rastvora metilen plavog (MP).Detaljna mineraloška karakterizacija ispitivanih glina i rezultati njihove interakcijesa rastvorima MP dobijeni su primenom optičkih, rendgenskih, hemijskih, DTA ispektroskopskih metoda.Na osnovu formiranja MP agregata u izmenljivim pozicijama i površiničestica gline, razlikuju se dva tipa glinovitih minerala: visoko naelektrisani(smektiti) i nisko naelektrisani (kaoliniti). Dimeri se stvaraju na naelektrisanimpovršinama, a granica njihovog razvoja omogućuje determinaciju mineralne vrste.Molekuli MP stoje pod uglom od 21.5o kada se ...minerali glina, metilen plavo, kristali metilen plavog, difuznarefleksija, adsorpcija, flokulacija, naelektrisanje slojeva... Liebigs Ann. Chem 230: 73 - 136 and 137 - 211 Bishop J.L., Pieters C.M. and Edwards J.O. 1994. Infrared spectroscopic analyses on the nature of water in montmorillonite. Clays & Clay Miner. 42 (6): 702 - 716 Bodman S.W., Kodama S.P., Pfeil P.C and Stevens R.E. 1967. Solubility and properties of ...
... sulfide intercalated with methylene blue. Solid State Sciences 4: 671 - 676 Cariati F., Erre L., Gessa C., Micera G. and Piu P. 1983. Polarization of water molecules in phyllosilicates in relation to exchange cations as studied by near infrared spectroscopy. Clays & Clay Miner. 31: 155 - 157 Caudo ...
... amin. Ber. Dtsch. Chem. Ges. 12: 592 - 595 Li Z., Chang P.H., Jiang W.T., Jean J.S. and Hong H. 2011. Mechanism of methylene blue removal from water by swelling clays. Chemical Engineering Journal 168: 1193 - 1200 Logar M. 1996. Sistematika silikata. Autorizovana skripta, Univerzitet u Beogradu ...Maja D. Milošević. "Efikasnost različitih tipova glina Srbije za adsorpciju metilen plavog" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-12-09)
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Crystal structure of K3EuSi2O7
alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu... furnace was switched off. After cooling to room temperature, the resulting material was manually removed from the crucible, washed with distilled water and dried in air. Bow-tie aggregate colorless crystals up to 300 μm size embedded in a polycrystalline matrix were observed. X-ray structure det ...Sabina Kovač, Predrag Dabić, Aleksandar Kremenović. "Crystal structure of K3EuSi2O7" in Journal of the Serbian Chemical Society, National Library of Serbia (2021). https://doi.org/10.2298/JSC210218026K
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Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides
Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem... Iancu et al., 2005b), overlain by passive margin continental late Carboniferous – Permian clastics and, locally, thin Triassic – Jurassic shallow-water limestone sequences (Kalenić et al., 1980; Petković, 1975a; Veselinović et al., 1970). The Getic unit is locally separated in Upper and Lower Getic ...
... Kräutner and Krstić, 2002). The sedi- mentary cover is composed of Permian alluvial red clastics and trans- gressive Lower – Middle Triassic shallow-water sediments overlain by N. Krstekanić et al. ...
... Global and Planetary Change 208 (2022) 103714 5 Middle Jurassic transgressive clastics and carbonates, Upper Jurassic – Lower Cretaceous deep water to reef limestones and dolomites (Fig. 3, e. g., Antonijević et al., 1970; Grădinaru et al., 2016; Krstić et al., 1976; Petković, 1975b; Veselinović ...Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga. "Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides" in Global and Planetary Change, Elsevier BV (2022). https://doi.org/10.1016/j.gloplacha.2021.103714
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Pre-failure deformation monitoring as rockfall prediction tool
... also detect reflectivity of the target point, as potentially valuable information in rock slope analysis (surface rock type, weathering degree water content might be correlated). These angular and distance measurements allow accurate reconstruction of each target point spatial coordinates (X,Y ...Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić. "Pre-failure deformation monitoring as rockfall prediction tool" in IOP Conference Series: Earth and Environmental Science, IOP Publishing (2021). https://doi.org/10.1088/1755-1315/833/1/012197
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Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty
... different directions. Rock masses anisotropy is especially manifested on their following properties: mechanical resistance, elasticity, deformability, water permeability and heat conductivity. Rocks often exhibit a macroscopic anisotropy of mechanical properties (Petružálek et al., 2008). Ultrasonic ...Miloš Gligorić, Jelena Majstorović, Suzana Lutovac. "Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty" in Underground Mining Engineering, Belgrade : University of Belgrade - Faculty of Mining and Geology (2018). https://doi.org/10.5937/PodRad1832001G
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Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report
Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić (2021)Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić. "Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2021). https://doi.org/10.1007%2F978-3-030-60196-6_19
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New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)
Nevenka Đerić, Nataša Gerzina (2014)... Dinarides: a working mod- el.– Ann. Univ. Sci. Budapest., Sect. Geol., 35, 143—144. DIMITRIJEVIĆ, M.D. (1997): Geology of Yugoslavia.- Geol. Inst. GE- MINI Spec. Publ., Belgrade, 187 p. DIMITRIJEVIĆ, M.D. (2001): Dinarides and the Vardar Zone: a short review ofthe geology.– Acta Vulcanol., 13, 1—8. ...
... the Balkan Peninsula during the Mesozoic.- Slovak Geol. Mag., 5/3, 173—177. KIESSLING, W. (1996): Facies Characterization of Mid-Mesozoic Deep- Water Sediments by Quantitative Analysis of Silicceous Microfau- nas.- Facies, 35, 231—274. KORCHAGIN, O.A., BRAGINA, L.G. & BRAGIN, N.YU. (2012): Planktonic ...Nevenka Đerić, Nataša Gerzina. "New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)" in Geologia Croatica (2014)
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Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking
Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović. "Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking" in X International Scientific Congress Innovations 2024, Varna, Bulgaria, 24-27. jun 2024, Scientific Technical Union of Mechanical Engineering "Industry 4.0" (2024)
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Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2
Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...... fluorophore and the quencher (dynamic quenching) and/or due to complex formation between the fluorophore and the quencher (static quenching). To deter- mine the mechanism of interaction between PLA2 and [RuCl2(bipy)2]Cl, fluorescence intensity data were analyzed by the Stern–Volmer equation: F0/F = 1 ...
... metal complex (1 mM in PBS). Results Determination of the PLA2 activity Kinetic analysis of PLA2 is rather complicated by the presence of a lipid/water interface and the dependence of the enzyme activity on the aggregation state, structure and surface concentration of the phospholipid substrate.32 ...
... al tract and is particularly abundant in pancreas and duodenum.49 This enzyme is involved in control of secretin release, which is important for water homeostasis and overall metabolism. The association of pancreatic PLA2 with cancer progression has not been demonstrated so far and the effect of ...Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković. "Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2" in Metallomics, Oxford University Press (OUP) (2011). https://doi.org/10.1039/c1mt00088h
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Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays
... resources/reserves classification. Exploration Stage (USA) Property Exploration Proving Assured Kaolin Reserve Mine Planning & Development Kaolin Quality Control and Mine Inventory Volume and Tonnage Measurement Exploration stage (Ser- bia) Preliminary Detailed Detailed Exploration ...
... deposit and economic geology. 4.1. Permitting in Serbia 4.1.1. Mining Sector The general procedure for exploration and exploitation of the new mine/quarry is divided in four steps: geological exploration, approval of exploitation, approval of execu- tion of mining operations, and approval for the ...
... may ask for a de- tailed regulation plan, particularly if the exploration target is close to some category of protected area or vulnerable area (water courses and vicinity of populated areas). The total procedure to obtain all permits related to exploration is usually 1–6 months depend- ing on required ...Vladimir Simić, Dragana Životić, Zoran Miladinović. "Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays" in Resources, MDPI AG (2021). https://doi.org/10.3390/resources10060063
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Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
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Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva
Ljiljana M. Vasić (2017-07-14)postupaka koji je primenjen u cilju definisanja zona prihranjivanja i veze izmeđupodzemnih i površinskih voda, vremena koje voda provede u podzemlju, pri čemu seformira jedinstven hemijski sastav i temperaturni režim isteklih voda, bili su polaznaosnova za usmerenje na istraživanje karsta i definisanje teme doktorske disertacije.Kučajsko-beljanički masiv se nalazi u istočnoj Srbiji i pripada oblasti Karpatobalkanskogluka i idealan je poligon za istraživanje, obzirom da se u okviru njega nalazejaka karstna vrela i pojave toplih karstnih izvora na relativno malom rastojanju, ...karstni sistemi, geneza podzemnih voda, izotopske metode, starost voda,hidrogeohemijski procesi, dubina cirkulacije podzemnih voda, subtermalne i termalnevode... MASSIF Abstract In order to define recharge zones, groundwater-surface water interaction, mean residence time and groundwater age, as well as genesis of hydrochemisty and temperature regimes of cold and lukewarm water, it was necessary to conduct a large number of different methodological approaches ...
... (2009) Bacteria contamination of groundwater in a mixed land-use karst region water quality, Exposure and Health doi: 10.1007/s12403-009-0006-7 45. Kendall C., Sklash M. G., Bullen T. D. (1995) Isotope tracers of water and solute sources in catchments. In: Solute Modelling in Catchment Systems ...
... research area, since at some locations at relatively short distances from karst springs with cold and fresh waters, drainage of thermal and sub-thermal water also occurs. This represent remarkable scientific challenge in terms of defining the genesis and circulation of cold and thermal groundwater flows ...Ljiljana M. Vasić. "Geneza i uslovi cirkulacije voda kompleksnih karstnih sistema Kučajsko-Beljaničkog masiva" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2017-07-14)
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The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines
In this paper we present how resources and tools developed within the Human Language Technology Group at the University of Belgrade can be used for tuning queries before submitting them to a web search engine. We argue that the selection of words chosen for a query, which are of paramount importance for the quality of results obtained by the query, can be substantially improved by using various lexical resources, such as morphological dictionaries and wordnets. These dictionaries enable semantic ...LR web services, MultiWord Expressions & Collocations, Information Extraction, Information Retrieval... expected, had a structure not yet found among compounds, such as adjective+noun+conjunction+noun in Beogradski vodovod i kanalizacija ‘Belgrade water supply and sewage system’. For many free phrases, especially those with fewer components, the structure was correctly detected and their inflected ...Krstev Cvetana, Stanković Ranka, Vitas Duško, Obradović Ivan. "The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines" in LREC 2008: Conference on Language Resources and Evaluation, Marrakesh, Morocco, May 2008, European Language Resources Association (ELRA) (2008)
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Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software
The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić. "Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2024)
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Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources
Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...... consist of projects, archival documents and bibliographies, library of geological projects documentation and exploration-exploitation approvals for water and solid min- eral resources. Within the geo-portal access to applications for document search and retrieval is available. A textual database of special ...
... The noun kvalitet ‘qual- ity’, adjective podzemni ‘underground’ and toponym Beograd have unambiguous lemmas, whereas voda can correspond to nouns ‘water’ and ‘platoon’, but also A u t h o r P r o o f 16 R. Stanković et al. to a form of the verb vodati ‘to lead someone’. The system also recognizes ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources" in Trans. Computational Collective Intelligence - Lecture Notes in Computer Science 26, Springer (2017). https://doi.org/10.1007/978-3-319-59268-8_8
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Indexing of textual databases based on lexical resources: A case study for Serbian
In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...... (catalogs): projects, archival documents and bibliogra- phies, library of geological projects documentation and exploration-exploitation approvals for water and solid mineral resources. One of the textual databases is the database of geological projects docu- mentation that contains metadata, namely structured ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Indexing of textual databases based on lexical resources: A case study for Serbian" in Semantic Keyword-based Search on Structured Data Sources : First COST Action IC1302 International KEYSTONE Conference, IKC 2015, Coimbra, Portugal, September 8-9, 2015. Revised Selected Papers, Springer (2015). https://doi.org/10.1007/978-3-319-27932-9_15
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Sedimentologija gornje krede centralnog dela vardarske zone
Violeta M. Gajić (2014-09-04)Područje istraţivanja obuhvaćeno doktorskom disertacijom nalazi se ucentralnim delovima Vardarske zone. Karakteriše se sloţenom geološkomgrađom koju grade mezozojske tvorevine trijaske, jurske i kredne starosti, kao ikvartarni sedimenti. U trijasu je istraţivano područje pokrivalo more, sve dogranice sa Šumadijom. Tokom jure sloţenim geotektonskim procesima stvarajuse ofiolitske stene rasprostranjene u juţnim i delom u centralnim delovimaistraţivanog područja. U donjoj kredi se pokretima dinarske faze izdiglo kopno,koje je egzistiralo skoro u celoj donjoj kredi područja istraţivanja.U alb-cenomanu pojedini delovi istraţivanog područja se ...... characteristics indicate continuity in sedimentation, with no abrupt changes in the regime of deposition. Gradual transition of coastal, shallow-water (shelf) and basin carbonate or carbonate- clastic rocks (continental slope) indicates shallow character of the basin. The first determined unit was ...
... sandy-clayey siltstones. They make a gradual transition to calcite sandstones, calcarenite and calcrudites, which represents the final phase of shallow-water facies and they are mostly eroded. In fine-grained sediments on Ješić and Rajac locality, hummocky cross bedding, which in upper parts are exceeding ...
... deposition. In the Upper Turonian, due to further transgression, deepening of the basin was even more evident. Sedimentation was with reduced water energy and appearance of pelagic organisms: radiolarians, foraminifera (Globotruncana) and macrofauna with ammonites and Inoceramus. Pelagic sedimentary ...Violeta M. Gajić. Sedimentologija gornje krede centralnog dela vardarske zone, Универзитет у Београду, Рударско-геолошки факултет, 2014-09-04
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Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове
Јелка Крушић (2023)Тецишта су комплексне појаве нестабилности које захтјевају истраживања и испитивањакоја до сада нису рађена код нас у области геотехнике. По механизму, начину активирањаи понашању покренутог материјала се знатно разликују од клизишта. Циљ оведисертације је била примјена нумеричких модела пропагације тецишта на примјеру двијепојаве које су се десиле у Србији као посљедица дјеловања циклона Тамара. Детаљноистраживање тецишта подразумијева теренско картирање, теренска истраживања илабораторијска испитивања одабраних узорака са терена. Од теренских истраживања напримјеру тецишта Селанац урађена су геофизичка истраживања Електричнетомографије док ...тециште, нумерички модели пропагације, циклон Тамара, геофизичка истраживања, лабораторијска испитивања, Селанац, Лева река, RAMMS, SPH geoflow, реолошки моделЈелка Крушић. Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове, Београд : Универзитет у Београду, Рударско - геолошки факултет, 2023
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Terminology Acquisition and Description Using Lexical Resources and Local Grammars
Acquisition of new terminology from specific domains and its adequate description within terminological dictionaries is a complex task, especially for languages that are morphologically complex such as Serbian. In this paper we present an approach to solving this task semi-automatically on basis of lexical resources and local grammars developed for Serbian. Special attention is given to automatic inflectional class prediction for simple adjectives and nouns and the use of syntactic graphs for extraction of Multi-Word Unit (MWU) candidates for ...... singular form or only in plural form, then the lemma will be in the respec- tive form (e.g. only singular form jamski vazduh ‘air in the underground mine’, only plural form atmosferske padavine ‘atmos- pheric precipitation’); if it appeared in both plural and singular forms, then both forms of lemmas ...
... subdomains: petrology, mineralogy, hydrogeolo- gy, geophysics, structural geology etc. RudOnto is covering the larger area of mining engineering and mine safety terminology (Stankovic et al., 2012). The third termbase used is the Dictionary of Library and Information Sciences (RNBS), 4 developed by ...
... preceded by an adjec- tive and followed by a prepositional phrase (as in case 4b); e.g. gravitacijska koncentracija u vodi ‘gravity concentration in water’. b. ANNgiNgi - a noun preceded by an adjec- tive and followed by two adjectives/nouns in the genitive case or in the instrumental case (a 4a case); ...Cvetana Krstev, Ranka Stanković, Ivan Obradović, Biljana Lazić. "Terminology Acquisition and Description Using Lexical Resources and Local Grammars" in Proceedings of the 11th Conference on Terminology and Artificial Intelligence, Granada, Spain, 2015, Granada : LexiCon (Universidad de Granada) (2015)