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Упит dcterms_subject_txt:Otoliti in situ

1979 items

  • Serbian Society of Geomorphologists

    Dragana Đurić, Jelena Ćalić (2019)

  • Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica

    Natalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel (2019)
    Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and Technology

  • Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera

    Aleksandra B. Kolarski (2016-08-25)
    Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...
    prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave
    ... saglasnosti sa rezultatima proračuna na osnovu drugih modela niske jonosfere, kao i sa rezultatima merenja primenom različitih tehnika, sa tla i “in situ”. Ključne reči: Prostiranje talasa vrlo niskih frekvencija, Talasovod Zemlja-jonosfera, globalno električno kolo, Atmosfersko električno ...
    ... srednja vrednost električnog polja oko 100 V/m (Mauchly, 1923; Hoffman, 1923). Integracijom vertikalnog električnog napona sa visinom (merenog “in situ” pomoću balona i letilica) dobija se razlika napona između jonosfere i Zemlje - jonosferski potencijal, sa srednjom vrednošću 250 kV (Markson, ...
    ... Satelit Demeter na orbiti od 700 km, namenjen prvenstveno za praćenje emisije ELF i VLF talasa koje emituju “zviždući” atmosferici, zabeležio je “in situ” elektromagnetske efekte koji potiču od sprajtova (Blecki et al., 2009). Dva sprajta snimljena su kamerom, 20. jula 2007. godine u 20:10:08 UT ...

  • Hydrochemical changes and groundwater grouping data by multivariate statistical methods within one karst system: recharge–discharge zone (Eastern Serbia case study)

    Ljiljana Vasić, Dragana Živojinović, Vladana Rajaković-Ognjanović (2020)
    Geochemistry and Petrology

  • Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics

    Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić (2024)
    Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...
    Lecki vulkanski kompleks, andeyit, kalcedon, kvarc, opal-CT, mikrostruktura, organska materija

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... registrovano GPS kordinatama. Izvršena su in situ merenja oksido–redukcionog potencijala (ORP), pH vrednosti i temperature podzemnih voda, pomoću paketa terenskih instrumenata WTW pH 3110 SET 2 i Electrode Sen Tix ORP 100 °C. ORP vrednosti koje su merene in-situ su korigovane prema standardnoj vodonikovoj ...
    ... Yardley B, Bordnar R. 2014. Fluids in the Continental Crust. In: Oelkers EH (eds.). Geochemical Perspectives 3(1). European Association of Geochemistry, EAG. 181. Zachara J, Brown C, Christensen J, Davis JA, Dresel E, Liu C, Kelly S, Mckinley J, Serne J, Um W. 2007. A Site-Wide Perspective on Uranium ...
    ... >197 mV, izdvojena prethodnom ROC analizom sa zadovoljavajućim odnosom senzitivnosti i specifičnosti: Se 76.9, Sp 61.2);  pH vrednost kao in situ merena varijabla (kako bi se povećala preciznost modela, pošto na osnovu ROC analize kriterijum za pH nije izdvojen sa velikom AUC vrednošću); ...

  • 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
    ... hyaena Crocuta crocuta spelaea (Goldfuss, 1823) from Baranica Cave (southeast Serbia): competition for a den site. In: Toškan, B. (Ed.). Fragments of Ice Age environments. Proceedings in Honour of Ivan Turk’s Jubilee, Opera Instituti Archaeologici Sloveniae, 21: 69–84. Dubois, A., Bour, R. 2010 ...
    ... Changes and Population Movements in the Late Lower and Early Middle Palaeolithic of the Central Balkans. In: Harvati K. & Roksandić M. (eds.) Palaeoanthropology of the Balkans: Human occupation and its context, 331 p. Mihailović, D., Mihailović, B. 2006. Palaeolithic site Hadži Prodanova cave by Ivanjica ...
    ... reptile and amphibian proxy at the Gran Dolina site, Atapuerca, Spain. Palaeogeography, Palaeoclimatology, Palaeoecology, 261: 177–192. Blain, H.–A., Gibert, L., Ferr{ndez–Cañadell, C., 2010a. First report of a greentoad (Bufo viridis sensu lato) in the Early Pleistocene of Spain: pale–obiogeographical ...

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... triaxial test was performed for five different values of confining pressures (σ3), namely, 5, 10, 15, 20, and 30 MPa. Considering that information on “in-situ” stress conditions was not available for this research, the values of confining pressures (σ3) were defined according to the recommendations given ...
    ... volumetric participation of altered dacite in the triaxial test is shown in Figure 9. Notably, Figure 9a–f shows that vertical and slightly angled cracks are formed during failure. In composite specimens, failure occurs in weaker rock material (Figure 9b–e). In specimens with 10% and 30% participation ...
    ... altered dacite. The unit weight values in the altered dacite ranged from 24.00–24.82 kN/m3 (mean value 24.37 kN/m3), and in dacite 23.83–24.97 kN/m3 (mean value 24.47 kN/m3). The values of water content in altered dacite ranged from 7.52–8.87% (mean value 8.21%), and in dacite 6.82–7.94% (mean value 7.36%) ...

  • 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
    ... definitely be enriched with new content in the forthcoming period, including data about the institutions where they work, research interests, references to authoritative research databases and the like. By way of exam- ple, here is a simple query, available at this site, showing a list of Infotheca articles ...
    ... it can be sped up in the situations where data already exists and is stored in different digital formats. With proper prior preparation, it can be entered in Wikidata semiautomatically. Therefore, the basic idea was to speed up the entry of data about the results of the research in the domain of digital ...
    ... numerous semantic web applications. In this paper, we will present an example of integra- tion of Wikidata with digital libraries and ex- ternal systems, as well as the potential for speeding up the process of data preparation and entry using the articles published in In- fotheca, Journal for Digital Humanities ...

  • Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина

    Aлександар Додеровић (2024)
    Површинска експлоатација минералних сировина захтијева претходно откопавање значајних( милионских) количина јаловине, које је неопходно транспортовати до локације на којој ће сеона трајно одложити. Традиционални приступ избора локације и дизајна одлагалишта се карактерише парцијалним приступом, заснованом на анализи неколико водећих критеријума као и на личном искуству инжењера, често занемарујући синергетски ефекат осталих утицајних фактора Технолошке операције које се односе на манипулацију јаловином, међу којима предњачи транспорт, генеришу највећи дио трошкова у површинској експлоатацији. Такође, цјелокупан процес експлоатације додатно је ограничен ...
    оптимизације завршне контуре одлагалишта, хибридни модел, површинска експлоатација, генетски алгоритам

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

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... basis, especially the number of layers and length of the pile. The quality of lignite extracted in Serbia is characterized by large variations in moisture and ash content, resulting in variations in lower heating value. The sulphur content is low, as is iron content, while mercury is monitored ...
    ... can be stacked in 16 to 90 layers. For a more realistic hourly capacity, the minimum and maximum number of layers changes. For a pit rate of 3000 t/h, coal can be stacked in 25 to 150 layers. The example in Figure 2 shows the problem when the pit operates at a lower capacity, and in a zone containing ...
    ... are all in the same row, or 4 if the piles are in two rows. Arranging the piles in a single row is more practical, because one fewer reclaimer can be used, but does not have to be, while the probability of collisions between stackers and reclaimers is lower than with stockyards arranged in two rows ...

  • Improvement of education through the cooperation between CEEPUS EURO Geo-Sci network and scientific projects: examples from UB-FMG

    Kristina Šarić, Dejan Prelević, Miloš Marjanović, Uroš Stojadinović, Vladimir Simić (2024)
    CIII-RS-0038, Recon Tethys, DEMONITOR, TMCmod, REASONING

  • 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)
    Landslides, Extreme precipitation, Data analysis, IPL project report

  • 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
    ... the Eh value for KNN-W2 (510 mV) still lies in the range characteristic for oxic conditions (Fig. 2). Bearing inmind that sampleswere collected im- mediately after excavation and kept hermetically closed, the KNN-W2 lignite must have been exposed to in situ oxidative conditions prior to excavation. This ...
    ... from 5 active coal mines located in Central Europe. In Poland, thesewere theBełchatów, TurówandKonin opencast mines,which together are responsible for ca. 95% of the country's lignite production (Polish Geological Institute, 2020). In Serbia, sampling was performed in the Kolubara opencast mine which ...
    ... however, was not noted in the results presented here. Among the studied samples, the most mature were lignites from the Turów mine. Organic matter accumulated in this coal basin is subjected to considerable geothermal heating (Liber-Makowska, 2013) which results e.g., in higher (in comparison to other ...

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... particles in the production fluid, the number of artificial methods that can be used is reduced. Parameter C3 represents GOR. With the increase in the gas factor in the production fluid, the efficiency of artificial methods, which can be used, decreases, except in the case of GL where an increase in GOR ...
    ... standard of all methods. In Figure 6b–f is given Figure 5. Results of the artificial lift method selection in the Salman field using the ELECTRE model [12]. Data from the Salman oil field are included in model M, described in the previous section, and results are given in Figure 6. Figure 6 shows ...
    ... interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. References 1. Naderi, A.; Ghayyem, M.A.; Ashrafi, M. Artificial Lift Selection in the Khesht Field. Pet. Sci. ...

  • 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 ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... enzyme activity in the absence and presence of metal complexes and to verify potential binding of these drugs to the enzyme. The tested metal complexes decreased the activity of phospholipase A2 in an uncompetitive inhibition mode. A binding of the ruthenium complex near the active site of the enzyme ...
    ... synthesized as described in the literature.28,29 Chemical analysis, UV-VIS and nuclear magnetic resonance (1H-NMR) spectral data of these complexes were in good agreement with those obtained in previous preparations. Structural formulae and relative masses of complexes used are given in Table 1. Porcine ...
    ... monitoring the changes in mass spectra in the m/z range 10 000–15 000, fresh solution of PLA2 c = 0.02 mg ml�1 in 50 mM Tris-HCl buffer (37 1C and pH = 8.5) was prepared and applied on the sample plate premixed with sinapic acid, as control. Metal complexes were dissolved in the same buffer to different ...

  • Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija

    Srđan D. Kostić (2013-11-04)
    U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...
    potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja
    ... vremenskog kašnjenja u izraz za trenje samo se pojačava efekat kompleksne prirode trenja na sam proces kretanja bloka (a i proces kretanja duž raseda in situ). Naime, u rasednoj zoni, usled kretanja, dolazi do pojave zagrevanja i topljenja stenske mase, termalnih pritisaka, stvaranja silika-gela koji ...
    ... razmatra se uticaj ovog parametra na dinamiku modela; 9     Slika 1-3. Vremensko kašnjenje τ, osmatrano u laboratorijskim uslovima (a), i in situ (b). Rezultati numeričke simulacije i poređenje sa terenskim podacima [Marone, 1998].   6) u radu [Kijko, i dr., 1993] ukazano je na vremensku ...
    ... parametra na dinamiku modela, smatramo da će njegova tačna uloga u realno osmatranim potresima biti određena budućim empirijskim istraživanjima (in situ ili u laboratorijskim uslovima). 10   Razlozi za uvođenje parametra jačine trenja c u Karlson-Langer model slične su prirode kao i za uvođenje ...

  • Nelinearno dinamičko modelovanje potresa izazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija

    Srđan D. Kostić (2013-11-04)
    U ovoj disertaciji, cilj istraživanja bio je određivanje dinamičkih svojstava potresaizazvanih promenom naponskog stanja pri izradi horizontalnih podzemnih prostorija.Analiza potresa izvedena je sa dva aspekta – u prvom delu istraživanja izučavane suvremenske serije oscilovanja tla za vreme potresa, a u drugom delu vršena je analizastabilnosti fenomenološkog Baridž-Knopof modela bloka sa oprugom. Vremenske serijeoscilovanja tla proučavane su primenom postupka analize surogat podataka, kao ikorišćenjem metoda analize nelinearnih vremenskih serija (primena teoreme orazvijanju skalarne vremenske serije). Analiza vremenskih serija izvedena je ...
    potres, naponsko stanje, podzemne prostorije, bifurkacije, vremenskaserija, deterministički haos, stohastičnost, perturbacije, vremensko kašnjenje, jačina trenja
    ... vremenskog kašnjenja u izraz za trenje samo se pojačava efekat kompleksne prirode trenja na sam proces kretanja bloka (a i proces kretanja duž raseda in situ). Naime, u rasednoj zoni, usled kretanja, dolazi do pojave zagrevanja i topljenja stenske mase, termalnih pritisaka, stvaranja silika-gela koji ...
    ... razmatra se uticaj ovog parametra na dinamiku modela; 9     Slika 1-3. Vremensko kašnjenje τ, osmatrano u laboratorijskim uslovima (a), i in situ (b). Rezultati numeričke simulacije i poređenje sa terenskim podacima [Marone, 1998].   6) u radu [Kijko, i dr., 1993] ukazano je na vremensku ...
    ... parametra na dinamiku modela, smatramo da će njegova tačna uloga u realno osmatranim potresima biti određena budućim empirijskim istraživanjima (in situ ili u laboratorijskim uslovima). 10   Razlozi za uvođenje parametra jačine trenja c u Karlson-Langer model slične su prirode kao i za uvođenje ...

  • Увођење доменских и семантичких маркера за област рударства у српске електронске речнике

    Иван Обрадовић, Александра Томашевић, Ранка Станковић, Биљана Лазић (2017)
    ... Lemmatization”, In: Proc. of the 10th International Confer- ence on Language Resources and Evaluation, LREC 2016, Portorož, Slov- enia, pp. 23–28. Крстев и др. 2016: Cvetana Krstev, Anđelka Zečević, Duško Vitas, and Tita Kyriacopoulou, “NERosettafor the Named Entity Multi-lingual Space”, In: Human Language ...
    ... Aleksandra Tomašević, Ranka Stanković, Bilјana Lazić INTRODUCING DOMAIN AND SEMANTIC MARKERS FOR THE FIELD OF MINING IN SERBIAN ELECTRONIC DICTIONARIES Summary Semantic markers in electronic dictionaries allow for complex queries for information extrac- tion. When it comes to domain-specific queries ...
    ... сипка, бункер, заштитни стуб, широко чело, вен- тилација +MinProcess Припрема минералних сировина кретање масе, узорак, уситња- вање, дробљење, сито, млевење, млин, класирање, концентрација, флотација, флотацијска пулпа, згушњавања, лужење, центрифу- гирање, депоновање +Petroleum Експлоатација ...