Претрага
876 items
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... gasa, drugo izdanje, Rudarsko geloški fakultet, Beograd, 243. Rachovich D. (2012) World's Top 23 Proven Oil Reserves Holders, Oil & Gas Journal, jan 2012. Rahmati H., Jafarpour M., Azadbakht S., Nouri A., Vaziri H., Chan D., Xiao Y., (2013) Review of Sand Production Prediction Models, Journal ...
... Washington, DC. Deng F., Deng J., Yan W., Zhu H., Huang L., Chen Z., (2013) The influence of fine particles composition on optimal design of sand control in offshore oilfield, J Petrol Explor Prod Technol, DOI 10.1007/s13202-012-0045-7. Denney D., (2002). “Simulation and optimization of continuous ...
... Nicolescu, C., Mucenica, D., Dobrota, S., Petrisor, I.G.,Stefanescu, M., Sandulescu L., (1999) The use of naturally occurring selectively isolated bacteria for inhibiting paraffin deposition, J. Petrol. Sci. Eng. 22, 161-169. Lee S., Chung K.C., Shin M.C., Dong J., Lee H., Auh K.H., (2002) Preparation ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... gasa, drugo izdanje, Rudarsko geloški fakultet, Beograd, 243. Rachovich D. (2012) World's Top 23 Proven Oil Reserves Holders, Oil & Gas Journal, jan 2012. Rahmati H., Jafarpour M., Azadbakht S., Nouri A., Vaziri H., Chan D., Xiao Y., (2013) Review of Sand Production Prediction Models, Journal ...
... Washington, DC. Deng F., Deng J., Yan W., Zhu H., Huang L., Chen Z., (2013) The influence of fine particles composition on optimal design of sand control in offshore oilfield, J Petrol Explor Prod Technol, DOI 10.1007/s13202-012-0045-7. Denney D., (2002). “Simulation and optimization of continuous ...
... Nicolescu, C., Mucenica, D., Dobrota, S., Petrisor, I.G.,Stefanescu, M., Sandulescu L., (1999) The use of naturally occurring selectively isolated bacteria for inhibiting paraffin deposition, J. Petrol. Sci. Eng. 22, 161-169. Lee S., Chung K.C., Shin M.C., Dong J., Lee H., Auh K.H., (2002) Preparation ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)
Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...... KRSTIĆ, Hemicytheria josephinae (ZALANYI), H. dubokensis KRSTIĆ, Bakunella dorsoarcuata (ZALANYI), Figure 11. The Upper Pontian (sensu STEVANOVIĆ) light-brown, fine-grained laminated sandy marls (a, b) and gray silts with large molluscan remains (c, d). Detail of the ostracod assemblage (e). ...
... – XII Congress of geologists of Yu- goslavia, Ohrid, vol. 5, 46–54. DOLIĆ, D. (1997): Jezerski miocen kod Beograda [Lake Miocene near Belgrade ‒ in Serbian and English].– Ann. Geol. Pennins. Balk., 61/2, 15–49. DOLIĆ, D. (1998): The relationship of Paratethyan and Miocene lake deposits of Serbia ...
... 13‒46. doi: 10.3897/zookeys.429.7420 PAVELIĆ, D. & KOVAČIĆ, M. (1999): Lower Miocene Alluvial Deposits of the Požeška Mt. (Pannonian Basin, Northern Croatia): Cycles, Megacycles and Tectonic Implications.‒ Geologia Croatica, 52/1, 67‒76. PAVELIĆ, D. & KOVAČIĆ, M. (2018): Sedimentology and stratigraphy ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić. "Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)" in Geologia Croatica (2019). https://doi.org/10.4154/gc.2019.11
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Crystal structure of (Bi0.94Sb1.06)S3 and reconsideration of cation distribution over mixed sites in the bismuthinite-stibnite solid-solution series
Poleti Dejan, Karanović Ljiljana, Balić Žunić Tonči, Gržetić Ivan. "Crystal structure of (Bi0.94Sb1.06)S3 and reconsideration of cation distribution over mixed sites in the bismuthinite-stibnite solid-solution series" in Neues Jahrbuch für Mineralogie - Abhandlungen 189 no. 2, Johannesstr. 3A D-70176 Stuttgart, Germany: E. Schweizerbarsche Verlagsbuchhandlung (2012): 177-187. https://doi.org/10.1127/0077-7757/2012/0217
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Стабилизација косине приступног пута у југоисточном делу површинског копа „Ћерамиде“
Никола Анђелић (2024)Експлоатација дацита као техничког камена се на површинском копу "Ћерамиде" врши дисконтуалном технологијом уз примену бушачко-минерских радова и високо капацитативне и габаритне опреме. Примане наведене технологије захтева стабилне и безбедне транспортне путеве како би се планирана производња и реализовала. Услед клизишта које је настало у зони главног извозног пута на површинском копу дацита "Ћерамиде" неопходно је обезбедити одговарајуће техничко решење којим би се косина пута довела у стабилно стање. У том смислу предложено је техничко решење са насипањем косине ...... jalovinskog materijala visine i gabionskim potpornim zidom h = 8.0m Slika 2.16. Rezultati analize stabilnosti kosine na profilu 1 - 1 sa formiranim nasipom od jalovinskog materijala i gabionskim potpornim zidom visine h = 8.0 m [ d 38 Nikola 4nđelić Slika 2.17. Izgled kosine na profilu ...
... 000% Opterećenje temelja: Vertikalna komponenta opterećenja V= 0.000kN iii “ — d. Horizontalna komponenta opterećenja H= 0.000kN (m) (KNim”) | (kN/m") | (kN/m”) [_2.00_|__1.00_|__0.00_| 198.77 179.41 Br in ch -H an so n I % EU RO CO DE 7 213.03 Faktor sigurnosti za cozvoljeno opterecenje ...
... 500 kN/m* = | u Kohezija c= 20.000 kN/m Geometrija temelja š ti ::a Ugao unutrašnjeg trenja g= 35.000 ? % 5 |d Ld H E Opterećenje temelja: LJ - Vertikalna komponenta opterećenja V= 0.000kN d da Horizontalna komponenta opterećenja = 0.000kN (m) (kN/m*) (kN/m ) (kN/m ) | (kN/m") | 0.60 | 0.00 | 172 ...Никола Анђелић. Стабилизација косине приступног пута у југоисточном делу површинског копа „Ћерамиде“, 2024
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An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction
Dejan Ćebić, Nebojša Ralević, Marina Marčeta. "An optimal sixteenth order family of methods for solving nonlinear equations and their basins of attraction" in Mathematical Communications (2020)
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Development of an integrated model for open-pit-mine discontinuous haulage system optimization
Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović . "Development of an integrated model for open-pit-mine discontinuous haulage system optimization" in Sustainability, MDPI (2024). https://doi.org/10.3390/su16083156
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Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine
Dragan Živković (2024)Ovaj rad se bavi analizom površinskih deformacija izazvanih zemljotresima u Turskoj iz 2020. i 2023. godine korišćenjem diferencijalne satelitske radarske interferometrije (DInSAR tehnike). Cilj istraživanja bio je da se kvantifikuju i uporede deformacije terena izazvane ovim seizmičkim događajima i da se razumeju mehanizmi koji stoje iza oslobađanja seizmičke energije u regionu. Analizom DInSAR snimaka, identifikovane su različite deformacije duž rasednih zona za svaki zemljotres. Dok je zemljotres iz 2020. godine (M 6,7) izazvao lokalizovane deformacije duž Istočno anatolijskog raseda, zemljotres ...Dragan Živković. Poređenje rezultata interferometrijske analize za zemljotrese na istočnom anatolijskom rasedu od 2020. i 2023. godine, 2024
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Geotehnički uslovi izgradnje tunela „Debelo brdo“ na autoputu E-80 Niš - Pločnik
Tunel „Debelo brdo“ nazvan je po najizraženijem relјefnom obliku na ovoj drugoj deonici autoputa E-80 Niš – Pločnik. Osnovnu geološku građu na lokaciji tunela čini Mio-Plioceni kompleks heterogenog litološkog sastava. Izgradnja tunela je predviđena delom u otvorenom iskopu dužine 240 m, a delom sa podzemnim iskopom dužine 190 m. U zoni tunela, padina je okarakterisana kao uslovno stabilna, pa bi neadekvatna zasecanja mogla da izazovu klizanja terena. Iz tih razloga, u okviru rada posebno su prikazani geotehnički uslovi izgradnje ...... materijalima u kojima se uslovima promene zapremina tj. da bubrenja (Slika 10). a) b) c) d) Slika 10. tokom prve faze iskopa: a) ruga faza iskopa za tunel; d) Izgradnja tunela na delu sa podzemnim iskopom po principima NATM (New Austrian Tunneling Method) , a nakon ...
... elementima su unutar Rezultati prikazani su na Slikama br. 11. a) b) c) d) Slika 11. Naponsko deformacijske analize : a) ukupna pomeranja nakon iskopa nakon iskopa kalote; d) zona plastifikacije nakon iskopa po - nem Iz tih razloga, efekti , razmatrani su na ...
... cr = 10-18 kPa trenja r = 10-120 za laporovite gline (gl-pr ), tj. cr = 9-14 kPa, i r = 7-110 za sloj lapora glinovitih (Lgl,pr). Zavisnosti od h frakcija, prikazane su na Slici 8. se u jednom uskom se za koheziju . Slika 8. . Me utim, ukoliko se nepovoljni sezonski vremens ...Dragoslav Rakić, Radojica Lapčević, Irena Basarić Ikodinović, Dragan Lukić. "Geotehnički uslovi izgradnje tunela „Debelo brdo“ na autoputu E-80 Niš - Pločnik" in Četvrti Srpski kongres o putevima, 2-3. jun 2022., Beograd : Srpsko društvo za puteve Via Vita (2022)
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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 ...... Philology (2008) A u t h o r P r o o f 24 R. Stanković et al. 13. Krstev, C., Obradović, I., Utvić, M., Vitas, D.: A system for named entity recog- nition based on local grammars. J. Logic Comput. 24(2), 473–489 (2014) 14. Manning, C.D., Raghavan, P., Schütze, H.: Introduction to Information ...
... in document (no uwi) and document length (li), (d) relative frequency tfij for each term tij in a text Di as nij/li where li is the length of the text in the number of simple words, (e) normalized term frequency ntf = log(tf + 0.5)/ log(max tf + 1), (f) H inquery = (max tf ≤ 200 ? 1 : 200/max tf), penalty ...
... Pavlović-Lažetić, G., Krstev, C., Vitas, D., Obradović, I. (eds.) Natural Lan- guage Processing for Serbian – Resources and Applications, pp. 101–112. Faculty of Mathematics, University of Belgrade. http://jerteh.rs/wp-content/uploads/2015/ 05/Zecevic.pdf A u t h o r P r o o f Author Queries Chapter ...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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Sinteza i strukturna karakterizacija mikroporoznih arsenata i fosfata
Sabina Z. Kovač (2015-09-28)Predmet rada i istraživanja ove doktorske disertacije su sinteza i strukturnekarakteristike novih kristalnih arsenata i fosfata koji sadrže Mg, K, Ca, Mn, Fe, Co, Ni,Cu, Zn, Sr, Ba i druge katjone. U strukturama arsenata i fosfata, AsO4- i PO4-tetraedrinajčešće se vezuju sa tetraedarski ili oktaedarski koordinisanim katjonima prelaznihmetala formirajući otvorene strukture (slojeve ili 3D mreže) sa širokim opsegomrazličitih topologija. U šupljinama ili porama u obliku povezanih ili nepovezanihkanala, tunela, kaveza i međuslojnog prostora mogu se ugraditi različiti vanmrežni joni(obično ...... cija mikroporoznih arsenata i fosfata Sabina Z. Kovač 70 Tabela 20. Vodonične veze u strukturi ZnAs. D‒H···A D‒H (Å) H·· ·A (Å) D·· ·A (Å) D‒H···A (º) N1‒H1···O3vii 0,89 2,041 2,928(2) 173,16 N1‒H2···O2ii 0,89 2,275 2,920(2) 129,23 N1‒H3···O11v 0,89 2,146 3,030(2) 173 ...
... z‒1/2; (v) y‒1, ‒x+1/2, ‒z+1/2; (vi) ‒x‒1/2, ‒y+3/2, z; (vii) ‒x, ‒y+1, ‒z+1. Tabela 21. Vodonične veze u strukturi ZnCoAs. D‒H···A D‒H (Å) H·· ·A (Å) D·· ·A (Å) D‒H···A (º) N1‒H1···O3vii 0,89 2,044 2,930(3) 173,18 N1‒H2···O2ii 0,89 2,273 2,914(3) 129,09 N1‒H3···O11v 0,89 2,150 3,036(4) 173 ...
... z‒1/2; (v) y‒1, ‒x+1/2, ‒z+1/2; (vi) –x‒1/2, ‒y+3/2, z; (vii) ‒x, ‒y+1, ‒z+1. Tabela 22. Vodonične veze u strukturi ZnFeAs. D‒H···A D‒H (Å) H·· ·A (Å) D·· ·A (Å) D‒H···A (º) N1‒H1···O3vii 0,89 2,042 2,929(3) 174,47 N1‒H2···O2ii 0,89 2,286 2,915(3) 127,81 N1‒H3···O11v 0,89 2,148 3,036(3) 174 ...Sabina Z. Kovač. "Sinteza i strukturna karakterizacija mikroporoznih arsenata i fosfata" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-09-28)
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Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis
... пез obviously decrease from Pyr400 о Pyr 500. Тће same is snelated (0 Cxo17P(H)21o(H)})/Cxo17a(H)21P(H})-hopane | and | Ciil7oa(H)21P(H)?2(S)/22(R)-hopane таноз, althoush they show less pronounced changes than above шепнопед parametets Steroid distributions in lignite extracts comprise exclusively ...
... ш hopano1d distributions is Cay17P(H)-hopane. Hopanoids with biological 17P(H)21P(H)-configuratton are present in all pyrolysates, whereas unsaturated 17(21)- and 13(18)-ћорепез, 1депићед ın lignite extracts, were not detected. The ratios ог Су, С and Cx17P(H)21fPH)-hopanes to 176(Н)218(Н)-ћорапез ...
... A+ and A? sterenes with sharp predominance ог Cx» homologues. Јп pyrolysates sterenes are absent and steroid distrbutons dominated by Cy-C» 5a(H)14a(H)17a20(R)-steranes. Prevalence ог Cx• homologue is apparent in аП pyrolysates, however и slightly decreases from Pyr400 to Pyr500. Thermodynamically ...Ivan Kojić, Achim Bechtel, Reinhard Sachsenhofer, Dragana Životić, Ksenija Stojanović. "Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis" in 29th International Meeting on Ogranic Geochemistry, 1-6 September 2019, Gothenburg, Sweden , European Association of Organic Geochemists (2019)
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Post Early Miocenevertical-axis clockwise rotation in the West Vardar Zone of Serbia
... with respect to Africa. fn: Pinter, N., Grenerczy, Gy., Weber, J1., Stein, S. & Medak, D. (Ed.). 7he 4dria microplate: GPS Geodesy, Tectonics and Hazards. NA4TO Science Series 1, 6, 71=80. Matton, E., Zampieri, D., Kazmćr, M., Dunkl, I. & Frisch, W. 2011. New Paleoce-Eocene paleomagnetic results from ...
... cs 504, 89-99. Matton, E., Zampieri, D., Ćosović, V. Moro, A. & Drobne, K. 2017. Apparent polar wander for Adria extended by new Jurassic paleomagnetic results from stable core: Tectonic implications. Tecfonopihnsics 700701, |-- 18. Schmid, S.M., Bemoulli, D., Figenschuh, B., Matenco, B., Schefer ...
... Зијап, M., Csibri, T., Kiss, P. and Rybar, S. (Eds.): Environmental, Structural and Stratigraphical Evolution of the Western Carpathians: 11'h ESSEWECAConference, Abstract Book, 29-30% November2018,Bratislava, Slovakia Post Early Miocenevertical-axis clockwise rotation in the West Vardar ...Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Jovanović. "Post Early Miocenevertical-axis clockwise rotation in the West Vardar Zone of Serbia " in Environmental, Structural and Stratigraphical Evolution of the Western Carpathians, 11th ESSEWECA Conference, Geophysical Institute, Slovak Academy of Sciences Bratislava (2018)
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Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone
The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...Emő Márton, Marinko Toljić, Vesna Cvetkov. "Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone" in Journal of Geodynamics, Elsevier BV (2022). https://doi.org/10.1016/j.jog.2021.101880
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On the compatibility of lexical resources for NooJ
Lexical resources for many languages are provided for the NooJ linguistic development environment. Meta-data descriptions of morphosyntactic and semantic properties of these languages and their resources are a mandatory part of each language module. In this paper we analyze how well the meta-data actually describe resources for a chosen subset of languages and to what extent are they compatible across languages to support multilingual processing. We show that there is place for improvement in both directions.... n+Lo+Mi+Wo+F+G+H+J+K+P+Q+S+T+U+Z Hr INF+INFk+PR+PRk+PRd+IMP+AO+AO2+PDR+PDT+IMT+GPS+GP P+s+p+1+2+3+m+f+n+np+cp+sp Bg s+p+0+d+h+l+o+v+c+f+m+n+y+z+i+a+t+1+2+3+b+w+x+A+B+C+K+ P+F+M+N+R+E+D+I+Y+Z+X+W+Q Sr m+f+n+1+2+3+4+5+6+7+s+p+w+v+q+g+i+a+b+c+d+k+W+P+A+I+Y +G+T+F+S+X+x+y+z+h Table 4. Analysis ...
... t+Liq +Alim+Vehicl+Pr+Tmp+Atm+Geom+CollHum+CollIm meub+Mach Hr s+p m+f +n N_Case= Nom+G+D+Acc+Voc+L+I N_Type=c+vl+r N_Sem=geo+etn+ust+ime+vr+kr+inc Bg s+p N_Case=v N_Definiteness=0+d+h+l+o N_Counting_Form=c Sr s+p +w m+f +n N_Animacy=v+q N_Distribution=Adj+Aug+Bot+Col ...
... En S+p 1+2+3 G+INF+PP+PR+PT Hu E+t 1+2+3 K+M+F+P Pl S+p mo+mr+ mz+f+n 1+2+3 F+G+H+J+K+P+Q+S+T+U+Z Hr S+p m+f+n 1+2+3 INF+INFk+PR+IMP+AO+PDR+PDT+ IMT+GPS+GPP+PER+FUT1+FUT2 Bg S+p f+m+n 1+2+3 R+E+D+I Sr S+p+w x+y+z W+P+A+I+Y+G+T+F+S+X Table 3. Analysis of *.def metadata: VERBS The ...Ranka Stanković, Miloš Utvić, Duško Vitas, Cvetana Krstev, Ivan Obradović. "On the compatibility of lexical resources for NooJ" in Automatic Processing of Various Levels of Linguistic Phenomena: Selected Papers from the 2011 International Nooj Conference, Cambridge Scholars Publishing (2012): 96-108
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Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака
Зоран Гојковић (2023)Површински коп, као систем који обезбеђује енергетску стабилност или снабдевање сировинама које су од изузетне важности за привредни напредак, својим функционисањем утиче на околна насељена места. Међу бројним аспектима овог утицаја, може се издвојити издвојити и анализирати утицај вертикалних и хоризонталних померања која се јављају на површи терена. Мониторинг вертикалних и хоризонталних померања површи терена околних насељених места треба да има што бољу временску резолуцију (временски период између праћења деформација) како би се вертикална и хоризонтална померања контролисала и ...Зоран Гојковић. Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака, Београд : Универзитет у Београду, Рударко - геолошки факултет, 2023
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The Late Cretaceous Klepa basalts in Macedonia (FYROM) - Constraints on the final stage of Tethys closure in the Balkans
Dejan Prelević, S. Wehrheim, M. Reutter, Romer, R.L., Blažo Boev, Milica Božović, P. van den Bogaard, Vladica Cvetković, Stefan M. Schmid (2017)Dejan Prelević, S. Wehrheim, M. Reutter, Romer, R.L., Blažo Boev, Milica Božović, P. van den Bogaard, Vladica Cvetković, Stefan M. Schmid. "The Late Cretaceous Klepa basalts in Macedonia (FYROM) - Constraints on the final stage of Tethys closure in the Balkans" in Émile Argand Conference - 13th Workshop on Alpine Geological Studies - September 7th-18th 2017 in Serbia, Zlatibor Mts., Beograd:University of Belgrade - Faculty of Mining and Geology (2017): 87-87
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Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions
Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák. "Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions" in Journal of Solid State Chemistry, Elsevier BV (2015). https://doi.org/10.1016/j.jssc.2015.06.027
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Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu
Marija D. Prekajski (2014-04-04)Nanoprahovi kristalnih faza iz serije čvrstih rastvora u pseudo-binarnom sistemuCeO2-Bi2O3 sintetisani su primenom jednostavne i ekonomične samopropagirajućemetode na sobnoj temperaturi korišćenjem nitrata metala i natrijum-hidroksida kaopolaznih supstanci. Osim krajnjih članova niza, CeO2 i niskotemperaturne polimorfnemodifikacije α-Bi2O3, sintetisani su i čvrsti rastvori nominalnog sastava Ce1-xBixO2-δ,gde je x = 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9. Rezultati proučavanja metodomrendgenske difraktometrije na polikristalnom materijalu i ramanske spektroskopskeanalize pokazali su da su sintetisani prahovi sa nižim sadržajem bizmuta (x = 0,1 ...nanostrukturni materijali, čvrsti rastvori, CeO2, Bi2O3, rendgenskadifraktometrija praha, Ritveldova metoda, mikrostrukrurna analizaMarija D. Prekajski. "Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-04-04)
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Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae
Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović. "Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae" in Organic Geochemistry, Elsevier BV (2019). https://doi.org/10.1016/j.orggeochem.2019.01.001