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Упит dcterms_subject_txt:space group

367 items

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik
    ... closely related to the protolith. It is represented by quartz, epidote, zoisite, chlo- rite, calcite, and minerals from the actinolite–tremolite group, while in more skarnized zones garnets and pyroxenes occur. Miocene sediments (conglomerates, sandstones, and clays) cover only a small area to ...

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  • Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities

    Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov (2024)
    Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...
    полилексемске језинице, именовани ентитет, вишезначност значења речи, складиште смисла, LLOD

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Navigacija budućnosti: poslovni rizici i prilike u rudarskoj industriji

    Petar Marković, Dejan Stevanović, Mirjana Banković, Vuk Lazić (2024)
    Sektor rudarstva i metalurgije se globalno suočava sa brzo evoluirajućim okruženjem u 2024. godini, koje karakteriše jedinstvena međusobna zavisnost rizika i prilika. Sektor je u središtu globalne energetske tranzicije, uz rastuću potražnju za kritičnim mineralnim sirovinama poput litijuma, nikla i bakra, koji su od suštinskog značaja za tehnologije obnovljive energije i električna vozila. Međutim, ova sve veća odgovornost donosi brojne izazove, uključujući pojačanu pažnju na ekološke, društvene i upravljačke (ESG) faktore, fizičke i tranzicione rizike uzrokovane klimatskim promenama, i ...

  • Threshold-induced correlations in the Random Field Ising Model

    Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević (2018)
    Multidisciplinary
    ... Dimensions. Phys. Rev. Lett. 71 (1993). 12. Dahmen, K. A. & Sethna, J. P. Hysteresis, avalanches, and disorder-induced critical scaling: A renormalization-group approach. Phys. Rev. B 53 (1996). 13. Dahmen, K. A. & Sethna, J. P. Disorder-Induced Critical Phenomena in Hysteresis: A Numerical Scaling Analysis ...
    ... Dimensions. Phys. Rev. Lett. 71 (1993). 12. Dahmen, K. A. & Sethna, J. P. Hysteresis, avalanches, and disorder-induced critical scaling: A renormalization-group approach. Phys. Rev. B 53 (1996). 13. Dahmen, K. A. & Sethna, J. P. Disorder-Induced Critical Phenomena in Hysteresis: A Numerical Scaling Analysis ...

  • Процена емисије гасова са ефектом стаклене баште као последице енергетске активности

    Горана Остојић (2024)
    Рад се бави анализом и проценом емисија гасова са ефектом стаклене баште, са посебним акцентом на емисије које настају као последица енергетских активности. Ефекат стаклене баште представља природни процес који је неопходан за одржавање живота на Земљи, али антропогене активности, попут индустријске производње и сагоревања фосилних горива, значајно повећавају концентрацију ових гасова у атмосфери, што доводи до климатских промена. Рад истражује узроке, последице и могућности за смањење емисија гасова, као и развој стратегија за ублажавање негативних ефеката на животну ...
    емисија гасова, ефекат стаклене баште, енергетске активности, климатске промене, мобилно сагоревање, стационарно сагоревање
    ... should be reported, as well as thosc from significant emitters of pollutants. A suggested list of categones is outlined below. ISIC Group 271 and Class 2731 ISIC Group 272 and Class 2732 ISIC Division 24. ISIC Divisioms 21 and 22 ISIC Divisioms 15 and 16 Includes products such as glass, ceramic ...
    ... Kuuamckux akuuja y Cp60uju. [IIpernenanHo 20. anrycra 2024]. JlocrynHo Ha: [13] IPCC 2001. Climate Change 2001: Mitigation Contribution of Working Group III to the Third Assessment, str. 2-14 [14]JOBAHOBHP, II. "Vramaj oKcHja aaora Ha e(DekaT craKiteHe Gamrre." Uaconuc 3a 2iIcugomny cpedOuny u ...

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... grain distribution. The average particle size estimated from SEM images is 3 µm and 5 µm. Rietveld refinement confirms that sphene crystallizes in space group P21/a аѕ a principle crystalline phase. The other two phases (perovskite and coesite) are present at all temperatures indicating its minor amounts ...
    ... pressure of 4.0±0.2 GPa at temperature 1200±50 °C (99.9 % of the theoretical value). Rietveld refinement confirms that sphene crystallizes in space group А2/a аѕ a principle crystalline phase. The most important structural change due to phase transition, the disappearance of the characteristic ...
    ... distortion of the Ti atom and moving to the center of octahedra, was also confirmed via Rietveld refinement. Phase transition from P21/a to A2/a space group was also verified in the IR and Raman spectra. The average particle size computed from X-ray diffraction pattern data for sphene is smaller than ...

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... grain distribution. The average particle size estimated from SEM images is 3 µm and 5 µm. Rietveld refinement confirms that sphene crystallizes in space group P21/a аѕ a principle crystalline phase. The other two phases (perovskite and coesite) are present at all temperatures indicating its minor amounts ...
    ... pressure of 4.0±0.2 GPa at temperature 1200±50 °C (99.9 % of the theoretical value). Rietveld refinement confirms that sphene crystallizes in space group А2/a аѕ a principle crystalline phase. The most important structural change due to phase transition, the disappearance of the characteristic ...
    ... distortion of the Ti atom and moving to the center of octahedra, was also confirmed via Rietveld refinement. Phase transition from P21/a to A2/a space group was also verified in the IR and Raman spectra. The average particle size computed from X-ray diffraction pattern data for sphene is smaller than ...

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... m, the direction of propagation is NE–SW and a slope of about 42˝ towards the southwest. These rocks, in engineering geological terms, belong to a group of associated rocks, which are cracked and karstified [11]. During previous investigation and exploitation works, no significant burst deformations ...

  • Extraction of Bilingual Terminology Using Graphs, Dictionaries and GIZA++

    Branislava Šandrih, Ranka Stanković (2020)
    U nauci, industriji i mnogim istraživačkim oblastima, terminologija se brzo razvija. Najčešće, jezik koji je „lingua franca“ za većinu ovih oblasti je engleski. Kao posledica toga, za mnoga polja termini domena su koncipirani na engleskom, a kasnije se prevode na druge jezike. U ovom radu predstavljamo pristup za automatsko izdvajanje dvojezične terminologije za englesko-srpski jezički par koji se oslanja na usaglašeni dvojezični korpus domena, ekstraktor terminologije za ciljni jezik i alat za usklađivanje delova. Ispitujemo performanse metode na domenu ...
    ekstrakcija terminologije, validacija terminologije, GIZA++, grafovi, Unitex, klasifikacija teksta
    ... used for terminology extraction. In this notation, A stand for and adjective, N for noun, X for a component that do not inflect. The separa- tors like space and hyphen are also labeled as X and nX is short notation for repetition of X n times. As an example, we present a FST for extraction of type N4X, meaning ...
    ... extracted from the text. As an external resource, we used the Dictionary of Librarianship: English-Serbian and Serbian-English. It was developed by a group of authors from the National Library of Serbia.2 In this paper we refer to this tool as LIS-dict. We also tried to extract terms on the source side ...

  • Production of morphological dictionaries of multi-word units using a multipurpose tool

    Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas (2011)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion
    ... variables, in our case $1=petokraka, $2=<space>, $3=zvezda. If a pattern of the form <$i > appears in the inflectional graph it means that the corresponding token is recopied in all MWU inflectional forms as it is — in our example a second token, a space, is reproduced in all inflectional forms ...
    ... was Fig. 2. Components of the software tool LeXimir LeXimir, 1 a multipurpose tool developed by the University of Belgrade Language Technology Group [10] to support com- putational linguists in developing, maintaining and exploiting e-dictionaries. LeXimir is written in C#, and operates on the ...

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... become a de facto standard for semantic networks based on the premise that in the human mind, words, as the fundamental ele- ments of language, group around concepts, ab- stract ideas, namely, mental symbols. concepts include objects belonging to a certain category, domain or a class of entities ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... direction of propagation is NE-SW and a slope of about 42º towards the southwest. These rocks, in engineering and geological terms, belong to a group of associated rocks, which are cracked and carstified [7]. During previous exploitation and exploitation works, no significant burst deformations ...

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)

    Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić (2021)
    This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...
    nafta i gas, Rock-Eval, refleksija vitrinita, maceral, termička zrelost
    ... to an immature stage of thermal maturity. �e Miocene coal sample analysed (Fig. 7) from the Gacko coal mine, with huminite as the major maceral group, pro- vided the most reliable data. More than 450 measurements were made, and the mean re�ectance was 0.34% Rr (lignite coal rank). �ese are also ...
    ... sponds to an immature stage of thermal maturity. The Miocene coal sample analysed (Fig. 7) from the Gacko coal mine, with huminite as the major maceral group, pro- vided the most reliable data. More than 450 measurements were made, and the mean reflectance was 0.34% Rr (lignite coal rank). These are also ...

  • Potencijalnost tercijarnih magmatskih kompleksa Vardarske zone Srbije sa aspekta arhitektonskog građevinskog kamena

    Lidija M. Kurešević (2014-01-22)
    U sastavu Vardarske zone, jedne od tektonski najsloženijih oblasti Balkanskogpoluostrva, u čijem domenu se odvijalo otvaranje i zatvaranje okeanskih prostora isubdukcija koja je dovela do intenzivne magmatske aktivnosti pretežno tokom tercijara,danas se nalazi veći broj magmatskih kompleksa.U ovoj disertaciji su obrađene geološke karakteristike trinaest izabranih magmatskihkompleksa Vardarske zone tercijarne starosti, i laboratorijski određena mineraloškopetrografskasvojstva stena u njihovom sastavu i fizičko-mehanička svojstva kamenaznačajna za utvrđivanje mogućnosti njihove primene za dobijanje blokovaarhitektonskog građevinskog kamena iz kojih se dobijaju ploče za oblaganjegrađevinskih ...
    Arhitektonski građevinski kamen, magmatske stene, Vardarska zona, Srbija
    ... complexes of Boranja, Bukulja, Kosmaj, Kremić and Željin fall within the group with high potentiality. The plutonic magmatic complexes of Brajkovac and Drenje and the subvolcanic body of Slavkovica fall within the transitional group between high and moderate potentiality. The volcanic magmatic complexes ...
    ... complexes of Ravno brdo (Borač) and Gradska Gora (Rudnik) fall within the group with moderate potentiality. The plutonic magmatic complex of Cer falls within the transitional group between moderate and low potentiality. The volcanic magmatic complexes of Talambas (Borač), Brvenik-Šumnik and Velika Bisina ...
    ... list Smederevo, L 34-126.- Savezni geološki zavod, 52 str., Beograd. Pécskay Z., Knežević V., Cvetković V. and Resimić-Šarić K., 2001: Time and space distribution of Tertiary granitoid rocks of Serbia: geodynamic implications.- Pancardi 2001, II, Abstracts, DP-14. Petković K., 1958: Neue Erkentnisse ...

  • Potencijalnost tercijarnih magmatskih kompleksa Vardarske zone Srbije sa aspekta arhitektonskog građevinskog kamena

    Lidija M. Kurešević (2014-01-22)
    U sastavu Vardarske zone, jedne od tektonski najsloženijih oblasti Balkanskogpoluostrva, u čijem domenu se odvijalo otvaranje i zatvaranje okeanskih prostora isubdukcija koja je dovela do intenzivne magmatske aktivnosti pretežno tokom tercijara,danas se nalazi veći broj magmatskih kompleksa.U ovoj disertaciji su obrađene geološke karakteristike trinaest izabranih magmatskihkompleksa Vardarske zone tercijarne starosti, i laboratorijski određena mineraloškopetrografskasvojstva stena u njihovom sastavu i fizičko-mehanička svojstva kamenaznačajna za utvrđivanje mogućnosti njihove primene za dobijanje blokovaarhitektonskog građevinskog kamena iz kojih se dobijaju ploče za oblaganjegrađevinskih ...
    Arhitektonski građevinski kamen, magmatske stene, Vardarska zona, Srbija
    ... complexes of Boranja, Bukulja, Kosmaj, Kremić and Željin fall within the group with high potentiality. The plutonic magmatic complexes of Brajkovac and Drenje and the subvolcanic body of Slavkovica fall within the transitional group between high and moderate potentiality. The volcanic magmatic complexes ...
    ... complexes of Ravno brdo (Borač) and Gradska Gora (Rudnik) fall within the group with moderate potentiality. The plutonic magmatic complex of Cer falls within the transitional group between moderate and low potentiality. The volcanic magmatic complexes of Talambas (Borač), Brvenik-Šumnik and Velika Bisina ...
    ... list Smederevo, L 34-126.- Savezni geološki zavod, 52 str., Beograd. Pécskay Z., Knežević V., Cvetković V. and Resimić-Šarić K., 2001: Time and space distribution of Tertiary granitoid rocks of Serbia: geodynamic implications.- Pancardi 2001, II, Abstracts, DP-14. Petković K., 1958: Neue Erkentnisse ...

  • Еоценска фауна југозападног дела Сирт басена (Либија)

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