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Упит dcterms_subject_txt:Structural analysis

748 items

  • Legal framework for recultivation of degraded areas caused by mining exploitation

    Radmila Gaćina (2023)
    Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...
    rekultivacija, melioracija, otkopavanje uglja, zakonska regulativa
    ... – to meet the present and future needs of the local population and the region”. 30 Gaćina R. Considering the concept of recultivation, the analysis of researchers" views on the concept of “recultivation” shows that it is increasingly being replaced by the terms “revitalization”, “renaturation” ...
    ... 3390/resources9060073 GUO, ., ZHENGI H., YUSHENG L. (2022). "Causes and Countermeasures for the Failure of Mining Land Use Policy Reform: Practice Analysis from China" Land 11, no. 9: 1391. https://doi.org/10.3390/land11091391 SKOUSEN J, ZIPPER C (2014) Post-mining policies and practices in the Eastern ...

  • Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material

    Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)
    Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...
    Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, Pyrophyllite

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation

  • Neogena i kvartarna herpetofauna (Anura i Squamata) Srbije : doktorska disertacija

    Dragana D. Đurić (2019)
    U radu je prvi put opisan deo herpetofaune (Anura i Squamata) iz neogenih i kvartarnih lokaliteta Srbije. Obrađeni su lokaliteti Sibnica, Prebreza, Lazarevc, Vračević i Riđake, neogene starosti. Lokaliteti kvartarne starosti su pećine Mala i Velika Balanica, Pešturina, Hadži Prodanova, Baranica, Vrelska pećina i sedimentne ispune fisura u kamenolomima Venčac i Beočin. U radu je prikazana je taksonomska analiza herpetoloških ostataka. Pored taksonomske analize fosilnog materijala dat je kratak geografsko-geološki opis proučavanih lokaliteta, osnovne osteološke karakteristike anura i skvamata ...
    paleoherpetofauna, Anura, Squamata, kvartar, pleistocen, neogen, Srbija, paleoekologija, paleoklima
    ... fillings of the Venčac, Beočin quarries as Quaternary localities were processed. The paper presents a taxonomic analysis of herpetological remains. In addition to the taxonomic analysis of fossil material, a short geographical and geological description of the studied sites, the basic osteological ...
    ... al characteristics of the anura and squamata, as well as their tafonomic characteristics were given. Taxonomic analysis included 2300 samples that were classified into the 35 taxa, total of the 23 species and 9 genera from 15 families have been identified. A part of the material was determined ...
    ... Telescopus cf. T. fallax Fleischmann, 1831; Malpolon cf. M. monspessulanus (Hermann, 1804). The comparative tafonomic, stratigraphic, paleoecological analysis, as well as comparison of literature data and the recently published studies, give confirmation of temporal variation in distribution of taxa ...

  • Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)

    Nevenka Novaković, Predrag Dabić, Vesna Matović (2023)
    Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...
    Raspadanje, Indeks oštećenja, Zatrpavanje, Fizička svojstva, Kersantit

  • 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
    ... (Kopaonik Mt.) with optical micro- scopy, electron microprobe analysis (EMPA), and FT–IR and Raman methods. It is entirely slightly anisotropic and without presence of isotropic areas, which was primarily caused by its non-cubic structural dissymmetrization (Tančić et al. 2020). Srećković-Batoćanin ...
    ... Representative LA-ICP-MS analyses of major elements in garnet SN-310 from studied skarns (in wt. % oxides (EMPA), rounded to second decimal place), structural formula, calculated end members (in mol. %) and measured trace elements (in ppm). 22 KOSTIĆ, SREĆKOVIĆ-BATOĆANIN, FILIPOV, TANČIĆ and SOKOL GEOLOGICA ...
    ... , 2021, 72, 1, 17–25 Meka Presedla (Kopaonik Mountain, Serbia). Acta Geologica Sinica 86, 393–406. Tančić P., Kremenović A. & Vulić P. 2020: Structural dissymmetriza- tion of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia). Powder Diffraction 35, 7–16 ...

  • 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

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... is set by contract is accepted, it is sufficient to stack coal in (only) 16 layers. However, the diagram was plotted based on results obtained by analysis of a certain number of samples from the entire deposit. Not considering the representativeness of the simulated data there is always suspicion ...
    ... stacker has a minimum travel speed (around 2-4 m/minute), which then restricts the minimum number of layers. This consideration should include an analysis of the stacker's operating capacity. This capacity depends on the operating capacity of the pit, which is quite variable in short intervals (second ...

  • Infotheca (Q25460443) in Wikidata

    Ranka Stanković, Lazar Davidović (2021)
    Vikipodaci su baza znanja Zadužbine Vikimedija koja predstavlja zajednički izvor različitih vrsta podataka koje koriste ne samo drugi Vikipedijini projekti, već sve više i brojne aplikacije semantičkog veba. U ovom radu ćemo prezentovati primer integracije Vikipodataka sa digitalnim bibliotekama i eksternim sistemima, kao i mogućnost ubrzanja pripreme i unosa podataka na primeru radova iz časopisa za digitalnu humanistiku Infoteka.
    semantički veb,otvoreni povezani podaci, vikpodaci,Infoteka, metapodaci časopisa
    ... which enables numerous applications in the domain of natural language processing. Let’s mention some of them: text classification, indexing, text analysis, summarizing, nor- malizing, linking, etc. Another important feature is multilingual support, making it possible to link each item to a label in any ...
    ... alignment for improving corpus search.” The Electronic Library. Krstev, Cvetana, Jelena Jaćimović, Branislava Šandrih, and Ranka Stanković. 2019. “Analysis of the first Serbian Literature Corpus of the Late 19th and Early 20th century with the TXM platform.” In Book of abstracts of DH_BUDAPEST_2019, ...

  • Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara

    Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)
    Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...
    Rotorni bageri, revitalizacija, SRs1200

  • Аnaliza mogućnosti povećanja nagiba završne kosine površinskog kopa “Podbraćan”

    Vladimir Čebašek, Veljko Rupar (2018)
    Eksploatacijom boksita iz ležišta "Podbraćan" formiran je površinski kop sa maksimalnom visinom zavšne kosine od 280 m. Redovnom kontrolom stabilnosti trenutnog stanja kosina površinskog kopa utvrđeno je da faktor sigurnosti iznosi Fs = 1.71 – 1.85, a što je ukazalo da postoji mogućnost povećanja nagiba kosine. U radu je prikazan postupak analize mogućnosti povećanja nagiba završne kosine površinskog kopa "Podbraćan".
    stabilnost kosina, povećanje nagiba kosina, metoda konačnih elemenata

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... obtained by using infrared spectroscopy. In the spectrum of NaM (Fig. 1a), the absorption band at 3626 cm'! was assigned to stretching vibrations of structural OH groups, while the absorption bands at 3447 cm"! and 1643 cm-! were assigned to stretching: and bending vibrations of water molecules in interlayer ...
    ... into rectorite. Spectrochim. Acta, Part A, 71, 1525—1534. DOI: 10.1016/j.saa.2008.05.015 Liu, W., Gan, J., Papiernik, S.K., Yates, S.R., 2000. Structural influences in relative sorptivity of chloroacetanilide herbicides on soil. J. Agric. Food Chem., 48, 4320 — 4325. DOI: 10.1021/jf090970+ Liu ...
    ... hydrocarbon chains. After the organic modification ofthe montmorillonite with the PTMA complex, stretching vibrations of the phenyl ring occurred. Analysis of FTIR spectroscopy data showed that the hydrogen bond is one of the most important mechanisms that occur between Na-montmorillonite and S-metolachlor ...

  • Crystal structure of K3EuSi2O7

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu
    ... materials for different applications. REE silicates also exhibit a broad structural diversity.10 A highly adaptive framework can incorporate almost all REEs and this opens the possibility of synthesizing numerous structures and structural series of REE-containing silicates. Small but systematic variations ...
    ... reduction. The structure of K3EuSi2O7 crystallizes in space group P63/mcm. Since it is isostructural with K3ErSi2O7,15 atomic coordinates of this structural analogue were used as a starting model for structure refinement. When Er3+ was replaced with Eu3+ the model converged rapidly, and the crystal ...
    ... slightly undersaturated values. This means that slightly deviating bonds are formed in order to satisfy the local valence disagreement due to structural disorder. These values are in accordance with the literature data for K3REESi2O7 13 that contains the rare-earth cation in both slightly distorted ...

  • Energetska bezbednost sektora prirodnog gasa Srbije

    Aleksandar Madžarević, Predrag Jovančić, Miroslav Crnogorac (2023)
    U prve dve decenije 21. veka obezbeđivanje sigurnosti snabdevanja prirodnim gasom domaćeg tržišta bio je jedan od prioriteta razvoja energetike Srbije. Istovremeno, aspekt sigurnog snabdevanja bio je neizostavni deo slagalice stvaranja energetske bezbednosti. Izražena uvozna zavisnost je dominantna karakteristika sektora prirodnog gasa, tačnije, Republika Srbija je snažno zavisna od ruskog gasa, sa više od 80% uvezenih količina gasa, a do pre dve godine snabdevala se isključivo kroz jednu interkonekciju. U radu se razmatra aktuelna situacija u sektoru prirodnog ...
    N-1, IDUPS, energetska bezbednost, sigurnost snabdevanja
    ... describe the availability of the system in a technical sense, the diversification of sources and directions of supply, as well as the degree of structural development, compared to the foreseen strategic development plans, respectively. This paper also presents a new methodology for determining the ...
    ... security of natural gas supply to Serbia, as well as its vulnerability to interruptions in international supply chains. Through the paper, an analysis of the energy security of the natural gas sector assessed by the N-1 index, IDUPS and the parameter of infrastructure development of the sector ...

  • 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

  • Еволуција напонског поља подручја Интерних Динарида у Србији током алпске орогенезе

    Ana S. Mladenović (2015-06-19)
    Циљ ове докторске дисертације био је реконструкција еволуције напонског пољаЗемљине коре у подручју Интерних Динарида у Србији током Алпске орогенезе.Истраживања за потребе решавања овог проблема су изведена у два дела. Првидео обухватао је анализу палеонапона на дефинисаном подручју истраживања,док се други део односио на анализу тренутно активног поља напона у овом делуБалканског полуострва. Истраживано подручје обухвата унутрашњи деоДинарског орогеног појаса, који се простире у централној и западној Србији. Собзиром на циљ истраживања, истраживано подручје је дефинисано тако даобухвата три ...
    Интерни Динариди, анализа палеонапона, фокални механизмиземљотреса, напонско поље, тектоно-магматски догађаји
    ... Kraljevo and Maljen area. Structural-geological field work was done in order to determine the paleostress tensors was done in two of these zones – the Kopaonik and the Maljen ones. Analysis of recently active stress field was done in all three seismogenic zones. Analysis of the paleostress fields ...
    ... – 966 Ramsay J.G. 1980. Shear zone geometry: a review. Journal of Structural Geology 2 (1/2): 83 – 99 Ratschbacher L., Frisch W., Linzer H.G., Merle O. 1991. Lateral extrusion in the Eastern Alps, part II: structural analysis. Tectonics 10: 257 – 271 Reinecker J., Heidbach O., Tingay M., Sperner ...
    ... 111 Kounov A., Burg J-P., Bernoulli D., Seward D., Ivanov Z., Dimov D., Gerdjikov I. 2011. Paleostress analysis of Cenozoic faulting in the Kraishte area, SW Bulgaria. Journal of Structural Geology 33: 859 – 874 Lanphere M., Coleman R.G., Karamata S., Pamić J. 1975. Age of amphibolites associated ...

  • A WordNet Ontology in Improving Searches of Digital Dialect Dictionary

    Miljana Mladenović, Ranka Stanković, Cvetana Krstev (2017)
    In this paper, we present a method for automatic generation of a digital resource, which connects all indirect synonyms of a dialect term to all indirect synonyms of a corresponding term in the standard language, aiming to improve the search of a digital dialect dictionary. The method uses SWRL rules defined in the Serbian WordNet ontology to identify sets of synonymous words. It also uses e-dictionaries to produce correct lemmas in standard language that users usually employ in searches. ...
    ... the metadata are usually used to search for specific dialectal information. For example, the retrieval of information in EDD can be limited to the structural units in the entries (heads, definitions, citations, comments, variants, etc.), while logical filters combining basic Boolean operators and metadata ...
    ... received a new impulse with the development of many software tools and digital resources for maintaining, enhancement, sharing, visu- alization and analysis of digital dialect dictionaries. This includes: the develop- ment of digital dictionaries of dialects [4], [13], [1], the development of tools for ...
    ... for the management of dialectal dictionaries [10], the software for data visualization and presenting of linguistic dialectal maps [12], [11], the analysis of the geo- graphical distribution of a language and geographical information relevant for linguistic research [9], using of Semantic Web-based techniques ...

  • Mio-Pliocene Geodynamics and its Stratigraphic Consequences in the Area of Avala Mt. (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević (2017)
    ... from the previously known stratigraphic units (Pannonian and Pontian, sensu Stevanović). Based on litho- and biostratigraphic analysis and measurement of basic structural elements of each units throughout the area, the obtained data were correlated with the results of two earlier drilled wells (KGK-13 ...

  • Tectono-lithostratigraphic model of the Northern Banat Miocene sediments (Pannonian Basin, Serbia)

    Dejan Radivojević, Ljupko Rundić (2017)
    ... Organic Geochem., 39/1, 118–134. MODELING OF ECOLOGICAL CONDITIONS IN THE EUXIN BASIN IN THE LATE SARMATIAN AND MAEOTIAN BY METHODS OF DIATOM ANALYSIS Eleonora Radionova Russia Geological Institute RAS, Pyzhevskiy per. 7, Moscow, 119017, Russia radionova@ginras.ru Modern diatom associations of ...