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Упит dcterms_subject_txt:max-min composition

307 items

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • New data on the age of an Upper Cretaceous clastic-carbonate succession in Brežđe (Western Serbia)

    Nevenka Đerić, Nataša Gerzina (2014)
    Gornja kreda, radiolarije, Jadar blok, zapadni pojas Vardarske zone, zapadna Srbija
    ... Central Dinaric Ophiolite Belt, Yugoslavia.- Contr. Min- eral. Petrology, 106, 201—216. MARKOVIĆ, O. & ANĐELKOVIĆ, M. (1953): Gcološki sastav i tek- tonika šire okolinc sela Osečenice, Brežđa i Struganika — Zapadna Srbija [Geo/ogical composition and tectonics of wider surroundings of villages ...
    ... Santonian and up- per Santonian; BRAGINA et al., 2014). A Santonian age is established for the studied radiolarians in Brežđe, but the taxonomic composition of the assemblages does not allow any further division. Geographically, the nearest similar radiolarian assem- blages, alttough younger (Campanian) ...

  • Hypogene speleogenesis related to porphyry magmatic intrusions and its influence on subsequent karst evolution in the Peruvian high Andes

    Alexander Klimchouk, David Evans, Sasa Milanovic, Cristian Bittencourt, Mauro Sanchez, F. Carlos Aguirre (2022)
    Earth-Surface Processes

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... , 2020. Microbial methane for- mation from different lithotypes of miocene lignites from the Konin Basin, Poland: geochemistry of the gases and composition of the microbial communities. Int. J. Coal Geol. 229. https://doi.org/10.1016/j.coal.2020.103558. Buendia, C., Kranjc, K., Fukuda, J., Osako, N ...
    ... Germany. Geochim. Cosmochim. Acta 65, 3505–3527. https://doi.org/10.1016/S0016-7037 (01)00693-7. Pawelec, S., Bielowicz, B., 2016. Petrographic composition of lignite from the Szczerców deposit, Polish Lowlands. Contemp. Trends Geosci. 5, 92–103. https://doi.org/10. 1515/ctg-2016-0007. Piwocki, M., ...
    ... Robbins, S.J., Evans, P.N., Esterle, J.S., Golding, S.D., Tyson, G.W., 2016. The effect of coal rank on biogenic methane potential and microbial composition. Int. J. Coal Geol. 154–155, 205–212. https://doi.org/10.1016/j.coal.2016.01.001. Saunois, M., Stavert, A.R., Poulter, B., Bousquet, P., Canadell ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... quarzlatitic composition. Curie- point measurements identified magnetite (Supplementary Fig. 2) and the magnetic softness of the NRM (Fig. 6) corroborated that the carrier of the remanence was indeed a magnetite-type mineral in the studied rocks, irrespective of the great variety in composition. The AMS ...
    ... et al. directions). However, shallow inclinations also occur among the dacitoandesites (e.g. 27 and 32, Fig. 10), which have weak anisotropies (max. 1.05, Lesić et al. 2013). So far we cannot point out a feasible mechanism for the shallow inclinations since bias due to overprinting is unlikely ...
    ... Željin and Kremići, Fig. 3; Schefer et al. 2011). In the Željin pluton and more prominently, in the Drenje massif, enclaves of more mafic composition are common. East of the Željin-Kopaonik anticlinorium weakly metamorphosed Senonian flysch with large olistoliths unconformably overlies the ...

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... of the class Svojstvo (Property) are: colour, composition category, chemicalcomposition, etc., while the relation- ship class SvojstvoEntiteta (EntityProperty) connects the instances of entities and proper- ties. For example, the property composition category is present in the entities mappedUnit ...
    ... of view of geology, since it features almost all the criteria for the determina- tion and multihierarchical classification of rocks (genesis, composition, structure, texture). IUgS (International Union of geological Sci- ences) publications related to the classification of volcanic and plutonic ...
    ... both cases we are dealing with the terms included in the vocabulary. Figure 4 shows the Uml domain management model. The abstract class MetaAd- min is inherited by other classes in the model. The Domain class is where all the data necessary for a description of some domain are registered: whether ...

  • Značaj izvodjenja Proktorovog opita na komunalnom otpadu

    Jovana Janković, Dragoslav Rakić, Tina Đurić, Irena Basarić Ikodinović, Laslo Čaki (2019)
    Komunalni otpad predstavlja jedan od ključnih problema današnjice. U Srbiji je najčešći vid odlaganja otpada na komunalne deponije i zbog toga je bitno ispravno i sigurno ga skladištiti. Zbijanje komunalnog otpada predstavlja jednu od osnovnih komponenti procesa odlaganja. Kako bi se što bolje predvidelo ponašanje komunalnog otpada neophodno je pre zbijanja na terenu laboratorijski odrediti maksimalnu suvu zapreminsku težinu i optimalnu vlažnost. U dosadašnjoj praksi u svetu za to se koristi standardizovan Proktorov opit. U radu će biti prikazani ...
    komunalni otpad, zbijanje, deponija, Proktorov opit
    ... da se izdvoji u neku koju se predpostavilo na Slici 1. 442 Slika 1:Prikaz sastava komunalnog otpada Figure 1: Preview of municipal waste composition homogenizaciju, mešanje i usitnjavanje svih komponenti. OPTIMALNE VLAŽNOSTI Proktorov opit je izveden na predhodno pripremljenim uzorcima u kalupu ...

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach

    Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)
    Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...
    pyrazoloquinolinones, nanocrystals, wet media milling, fasted/fed bioavailability
    ... DK-I-60-3 (p < 0.05: F5 vs. S5 (20 min), F5 vs. S5 (60 min); F6 vs. S6 (20 min), F6 vs. S6 (60 min), F6 vs. S6 (8 h); F8 vs. S8 (60 min), F8 vs. S8 (2 h), F8 vs. S8 (8 h); F5 vs. F6 (4 h), F5 vs. F6 (8 h); F6 vs. F8 (4 h), F6 vs. F8 (8 h); F5 vs. DK (20 min); F6 vs. DK (20 min), F6 vs. DK (2 h), F6 vs. DK ...
    ... substance was heated to 330 ◦C, with a heating rate of 20 ◦C/min, then cooled to 25 ◦C with a cooling rate of 40 ◦C/min and finally heated again to 330 ◦C with a heating rate of 10 ◦C/min. The measurements were conducted under nitrogen flow (50 mL/min) by DSC 1 (Mettler-Toledo AG, Analytical, Greifensee, ...
    ... physical mixtures were heated to 330 ◦C in aluminum pans with a heating rate of 10 ◦C/min using DSC 1 (Mettler-Toledo AG, Analytical, Greifensee, Switzerland). The nitrogen flow during the measurements was set to 50 mL/min. X-ray Powder Diffraction Analysis (XRPD) Nanocrystal dispersions with different ...

  • Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)

    Liubov Bragina, Nikita Bragin, Luidmila Kopaevich, Nevenka Đerić, Nataša Gerzina Spajić (2020)
    Santonian, Campanian, radiolarians, planktonic foraminifera, biostratigraphy, limestones, Struganik, Serbia

  • Еоценска фауна југозападног дела Сирт басена (Либија)

    Љупко Рундић, Мери Ганић (2020)
    Еоцен, крупни мекушци, нумулити, ЈЗ Сирт басен, Либија

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Петролошке карактеристике тријаских карбоната у околини Толића (Мионица)

    Михаило Вујашевић (2024)
    У тријаским теренима у околини Толића код Мионице извршено је узорковање карбонатних стена које су предмет овог рада. На одабраним узорцима утврђене су петролошке карактеристике. Главни задатак овог завршног рада представља испитивање минералошких и петрографских карактеристика карбонатних стена, применом оптичке анализе, рендгенске дифракције и калциметрије. Макроскопском детерминацијом и применом Данхамове класификације испитивани узорци су сврстани у кречњаке калкаренитског до калклутитског склопа, односно mudstone, packestone и grainstone типа. Микроскопским прегледом кречњака и применом Фолкове класификације утврђен је њихов састав и ...
    тријаски карбонати, петрографске карактеристике, класификације кречњака
    ... BpeMeHcKa KOHcTaHrTa: 10 */min Cuuka 3. PepnireHcku a(bpakroverap „Rigaku SmartLab” (Ooro C. Konau). /loOujenu monmamm 3a mnooxaje JH(O)bpaKHMOHMX MaKcCHMyMa 20(), BpeJIHOCTH MClyIUbOCHHX pacrojaba 3a cBc pedQjmekcuje, Kao H ojroBapajyhu penaTHBHH HHTeH3HTCTH ///max npakaaaHu cy rpa(buku y p ...
    ... classified as limestones of calcarenitic to calclutitic composition, specifically of the mudstone, packstone, and grainstone types. Through microscopic examination of the limestones and the application of Folk's classification, their composition was determined, and they were identified as fossiliferous ...
    ... yoxHukor. Zapisnici SGD za 1889. god., Beograd. (IIpeyaero 3 mareparype HaBeJteHe moji p. op. 15) 2. Gikić, S., 1892: Godišnjak rudarskog odeljenja min. narodne privrede, str. 176, Beograd. (IIpey3ero 3 nareparype HaBc/neHe moji p. op.15) 3. Dunham, R.J. 1962: Classification of carbonate rocks according ...

  • Развој геолошког информационог система Републике Србије

    Бранислав Благојевић, Бранислав Тривић, Ненад Бањац, Ранка Станковић, Велизар Николић (2005)
    Геолошки информациони систем Србије (ГеолИСС) је пројектован, првенствено, са намером ефикасног дигиталног архивирања геолошких и њима сродних података. У овом раду је приказана структура базе података као основа за развој геолошки конципираног ГИС-а. Нови, објектно орјентисани (О-О) начин моделирања омогућио је дефинисање самосталних типова објеката, хијерархијски повезаних кроз тополошке и друге релације, чиме је обезбеђена њихова медјусобна интеракција. Објектно оријентисано моделирање извршено је коришћењем унифицираног језика моделирања (UML) и CASE алата, кроз концептуални и логички ниво. Физички модел ће ...
    ГеолИСС, геолошки подаци, управљање базама података, концептуални модел, логички модел, ГИС
    ... Stena Sklop Petrogeneza Procesi +input stvaranje+izmene+deformacije * 1.. +uredjenost +input +output 3. UML scheme of the lithological composition cla Г мереног елемента склопа и б/ KompozitnaStruktura као дедукована хомогеност/изотропност творних елемената склопа и/или дескрипција структурно ...

  • Testing the energy value of different types of coal by the method of active thermography

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković (2020)
    In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...
    Infrared imaging, nondestructive testing, active thermography, coal.

  • Uniaxial compressive strength test before and after standard fire test on rock mass

    Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)
    ... paper, it is not possible to determine uniaxial compressive strength after standard fire test. Standard fire test showed that the rock is of such composition, it will disintegrate at high temperatures. For tunnel structure, this significant drop in strength after standard fire test is not dangerous ...
    ... (1) below. ( ) 2018log345 10 ++=Θ tg (1) where: t [min] time, and T [° C] temperature inside furnace depending on time t. In Figure 4 standard fire curve according to SRPS EN 1363-1 is presented. ...

  • Određivanje zbijenosti starog komunalnog otpada

    Jovana Janković, Dragoslav Rakić, Irena Basarić Ikodinović, Tina Đurić (2021)
    Bez obzira na savremene tretmane komunalnog otpada u svetu, u Srbiji je i dalje najčešći vid odlaganja na komunalne deponije, pa zbijanje otpada predstavlja jednu od ključnih faza formiranja deponije. Na ovaj način znatno se smanjuje zapremina otpada, ubrzava proces degradacije i produžava radni vek deponije. Zbog toga su geotehničke karakteristike komunalnog otpada prilikom zbijanja, veoma bitne kako u fazi projektovanja tako i u fazi izgradnje deponije i optimizacije prostora. Tu se pre svega misli na maksimalnu suvu zapreminsku ...
    komunalni otpad, deponija, Proktorov opit, optimalna vlažnost, maksimalna suva zapreminska težina

  • 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 ...
    Geochemistry and Petrology

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... onal companies. AlI the fatty acid chains incorporated in the biodiesel composition are those originated from the starting triglycerides. Hence, the FAME composition of biodiesel reflects the fatty acid (FA) composition of the source triglycerides and it determines some critical properties of ...
    ... Geology, Belgrade University, Republic of Serbia. As a bursar ofthe Governement Science Foundation of Serbia and the Max- Planck Institute, Dr. Rade Jelenkovic specialized at the Max-Planck Institute for Nuclear Science (Heidelberg, Germany) in 1991 in the fields of Ore Microscopy, Electron Microprobe ...
    ... Efekat navodnjavanja na prinos i kvalitet soje [G/ycine max (L.) Merr.]. Institut PKB Agroekonomik, Beograd, 11-21. [Drying: the limiting factor in soybean production. The effect of irrigation on yield and quality of soybeans [Glycine max (L.) Merr.|. Journal of Institute of PKB Agroeconomic, ...