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Упит dcterms_subject_txt:Time series

335 items

  • 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
    ... Bragg-Brentano geometry and Cu Kα radiation. The diffractometer was operated at 40 kV and 30 mA, while the scan range was from 3 to 60° 2θ, with a step size of 0.02° and time per step of 1.25 s. PDXL 2 software18 was used for the powder diffraction data analysis. Scanning electron microscopy (SEM) was ...
    ... Eu2O3 and SiO2 in a molar ratio of 1:4 was added to 1 g of KF. The resulting mixture was homogenized in an agate mortar, transferred to a platinum crucible covered with a platinum lid and placed in a resistance-heated furnace. The mixture was heated to 1173 K at a rate of 200 K/h and kept for 10 h ...
    ... temperature was lowered to 973 K at a rate of 2 K/h and then the furnace was switched off. After cooling to room temperature, the resulting material was manually removed from the crucible, washed with distilled water and dried in air. Bow-tie aggregate colorless crystals up to 300 μm size embedded ...

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... device, connected to the Thermo-Finnigan Delta+ mass spectrometer. The quality of analysis was controlled by measurements of the international standard NBS-19 with any sample series (3–5 NBS-19 measurements per samples series). All values are reported in per mil relative to V-PDB. Reproducibility ...
    ... similarities relate also to the age of the radiolarites. Cherty limestones of the Chiemgau series, which are lithologically similar to the Tatra spotted radiolarites, for the most part arc of Bathonian-Callovian age. The overlying Ruhpolding Formation, which seems to be the age and lithological ...
    ... Lower Triassic to Lower Cretaceous deposits and is made up of several thrust slices. The Križna Nappe belongs to the Fatricum Domain in the Central Carpathian block (Plašienka, 2012). During most of Jurassic time, it was one of the domains lying be- tween the Alpine Tethys to the north and the ...

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... and associated deformation. To this aim, we performed a series of analogue experiments designed to analyse the deformational response to the shape of the rigid indenter (rounded or rectangular corners), the displacement (translation followed by rotation) along the margins of a rigid indenter and ...
    ... wedge topography rapidly decreases northwards along a series of normal faults leading to a narrow transition zone (Fig. 9b). The structure of the thrust wedge that forms south of the indenter is largely independent of the indenter geometry. The top to north basal thrust has a flat-ramp-flat geometry ...
    ... of the rigid block, where, otherwise, extension along the northern edge of the indenter would take place. At the same time, the area to the north- west of the rigid block is free to move. This setup predefines velocity discontinuities (VD) along the southern and western margins of the rigid block ...

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... exercises that should facilitate the understanding of the course subject and enable the participants to easily acquire the necessary knowledge to use the existing resources for NLP for Serbian and to develop new ones. Keywords: E-Learning, Open Educational Resources, Computational Linguistics, Lexical ...
    ... experience, from spelling and grammar correction in word processors to machine translation on the web, from email spam detection to automatic question answering, from detecting people's opinions about products or services to extracting appointments from your email. [2] A short overview of the ...
    ... basic didactic criteria [15]:  adjusting the content to the target group,  systematization and gradualism in the teaching process,  connecting the theory and the practice. To satisfy the first criterion of adjusting the content to the target group, we provided a description of the course ...

  • Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7

    Dragoslav Rakić, Zoran Berisavljević, Irena Basarić, Snežana Bogdanović, Jovana Janković (2019)
    Part of E-80 highway that passes through Serbia (from the city of Nis to the administrative border Merdare) is 77 km long. The highway is divided into two sections: the first from Nis to Plocnik (39.4 km long) and the second from Plocnik to the administrative border with Kosovo. The route is designed through a typical plain and hilly terrain in which different geological units are dominant: crystalline schists, neogene sediments of foothills and quaternary sediments in the valley ...
    ... climatic conditions, - „factors of the future“ that are related to the geotechnical complexity of planned highway structure construction (excavations, cuts, embankments, drainage etc.). The influence of the mentioned factors over time is schematically presented in Figure 8. Three categories are ...
    ... short period of time. Coarse grained sediments dominate in surface part, with good strength and deformability characteristics, so it is characterized as favourable-A for construction (around 79%). The rest (around 19%) is characterized as conditionally favourable-B mostly due to locally presence ...
    ... through Serbia (from the city of Nis to the administrative border Merdare) is 77 km long. The highway is divided into two sections: the first from Nis to Plocnik (39.4 km long) and the second from Plocnik to the administrative border with Kosovo. Compared to the total length of the first section ...

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)

  • A Mathematical Learning Environment Based on Serbian Language Resources

    Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan (2018)
    In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...
    mathematical content, text processing, mathematical formulae
    ... important to note that all logged users are divided into 4 roles: reader, editor, reviewer and administrator. The reader is a user who only has right to read, which is a role that is by default assigned to every user at registration. Editor and reviewer are users who have the task to update ...
    ... practice. To that end complex issues had to be resolved, such as mathematical text analysis, processing of mathematical content in different formats, search of mathematical materials, indexing of mathematical content using Serbian lexical resources, issues that are further complicated due to rich Serbian ...
    ... and Practice Radojičić et al. 249 references, and links to software. The search offers feedback with appropriate concordances. Mathematical formulae are converted to LaTex and then indexed. User requests are also converted to LaTex, and the search proceeds as with ordinary text. Another ...

  • Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...
    Grejanje, Analiza životnog ciklusa, Drvna biomasa, Individualni sistemi grejanja
    ... very useful method for researching studies related to the problem of sustainable development, cleaner production, energy savings, and environmental protection. This study follows an approach that is based on the international standards series ISO 14040. It is made up of four steps (four main phases): ...
    ... the residential stoves that are in use in Serbia today are low-to-mid-price and low-to-mid efficiency, compared to the best available models in the European market. To estimate the amount of fuel needed for one heating season, it is used AERS’s data on the average efficiency of HSs and the lower heating ...
    ... The main objective of this LCA study is to assess the environmental performance of two HSs based on wood biomass installed in Serbia using the global warming potential (GWP) index. The study also aims to identify the LC phases that contribute the most to the GWP of each HS. 2 METHODOLOGY Even ...

  • Permanent GNSS monitoring of landslide Umka

    Mileva Samardžić Petrović, Jovan Popović, Uroš Đurić, Biljana Abolmasov, Marko Pejić, Miloš Marjanović (2020)
    Клизиште Умка је једно од највећих насељених активних клизишта у Србији. Активност клизишта Умка се прати већ више од 85 година, различитим геотехничким и геодетским техникама. Од 2010. године, активност kлизишта се континуирано прати у реалном времену аутоматизованим перманентним системом за праћење базираним на Глобалним навигационим сателитским системима (ГНСС). Поред тога, од 2018. године активност клизишта се додатно прати кинематичким ГНСС одређивањем положаја скупа карактеристичних тачака као и применом UAV фотограметрије. Главни циљ овог рада је приказ резултата опажања три ...
    клизиште, перманентно праћење, ГНСС
    ... 2010, to the December 2013; and the second time period from the September 2014 to the date (Figure 2.). Displacement of object point from March 2010 to December 2013 (left figure) and from September 2014 to end of December 2018 (right figure), for 12h interval. During the first time period ...
    ... was successfully used in order to track the dynamics of Umka landslide in real time. In general, the derived data of automated monitoring are analyzed for two time periods separately, due to the relocation of the object point on December 2013 [1]. The first time period from the beginning of the ...
    ... moves toward the Sava river. Due to the large number of characteristic points, only points with horizontal displacements (D) larger than 6 cm, during the time period from April 2018 to April 2019 are presented in Table 2. During the time period from April 2018 to November 2018 the horizontal d ...

  • Хазард од клизишта у Србији у 21. веку

    Biljana Abolmasov (2019)
    клизишта, хазард од клизишта, промене климе
    ... years, Serbia has been vulnerable to natural haza floods, torrential floods and landslides. Landslides are one of hazards in Serbia (according to the international classification). E or areas prone to landslides are covering more than 16% of the S (according to a rough estimation and published ...
    ... recent years, Serbia has been vulnerable to natural haza floods, torrential floods and landslides. Landslides are one of hazards in Serbia (according to the international classification or areas prone to landslides are covering more than 16% of the (according to a rough estimation and published scientific ...
    ... Groups I, II and III to the Fifth Assessment Report of the Interge 87������ �� ›������� � ������ � 21. ��›� on Climate Change [Core Writing Team, R.K. Pachauri and L.A. Meyer (e Geneva, Switzerland, 151 pp. http://www.ipcc.ch/ (��� ������� 2. 8. 2017). [28] Kr�i� A., To�i� I., Djurdjevi� V.; ...

  • Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia

    Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić (2019)
    Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology
    ... Ladinian to Late Jurassic stratified cherty limestones in all units that derived from the Adriatic passive margin. Due to the fact that in this case the Grivska Formation includes geneti- cally different sedimentary successions, MISssoNI et al. (2012) restrict the name Grivska to Triassic hemipe- ...
    ... erate to poor and some individuals are determined in open nomenclature or only in generic level. The taxonomic diversity of radiolarian assemblages is low due to selective and poor preservation. Radiola- rian tests are commonly recrystallized. Anyway, ob- tained results allow us to date limestone ...
    ... limestone deposits of Grivska Formation. According to the presence of characteristic taxa (Table 1) both samples can be assigned to the upper- most Carnian to lower Norian. This stratigraphic in- terval is well-known worldwide in low latitudes by the presence of Capnodoce, Capnuchosphaera ...

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... practice; therefore, caution must be exercised in their ap- plication. For this reason, it is not recommended to use these correlations in series, that is, by adding one correlation to another in sequence. Acknowledgments We thank Edanz (www.edanz.com/ac) for editing a draft of this manuscript ...
    ... cylinders. Other than static CBR, this is the only method that can be used in the laboratory to determine the re- quired CBR, values related to the compaction characteristics. Under field conditions, it is possible to estimate the soil compaction by comparing the in-situ CBR, results with predefined minimum ...
    ... required to perform the test. A plate with a diameter of 500 mm was used to determine the modulus of deformation, and the load was increased until a normal stress of 0.5 MN/m? was reached below the plate. Before the test started, the load transducer and the number gauge or transducer were set to zero ...

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • Geodynamics of basins above subducted slabs: An integrated modelling study of tectonics, sedimentation, and magmatism in the Timok Magmatic Complex

    Uros Stojadinovic, Marinko Toljic, Branislav Trivic, Radoje Pantovic, Danica Sreckovic-Batocanin, Nemanja Krstekanic, Bojan Kostic, Milos Velojic, Jelena Stefanovic, Nikola Randjelovic, Maja Males (2024)
    Timok Magmatic Complex, Neotethys subduction, basin geodynamics, analogue modelling

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... no singlle relaxation time (T), but several of them whose distribution can be presented with mean relaxation time (Tp = wpfl). This is characteristic of non-Debye relaxation in which the depression angle (0) relates to the distribution width of the relaxation time due to the non-uniform grain ...
    ... cheap production [59—65]. This paper addresses a simple route to prepare a series of a composite o. BaTiOx /NixZni_„Fe>Oua (x = 0, 0.5, 1) via the thermal decomposition of acetylacetonate complex precursors onto BaTiOy surface and processing of obtained structures into dense ceramics. The effect ...
    ... increase in the frequency, most probably due to heterogeneous conduction and electronic polarization contribution of the ferrite phases [73,74]. The EIS analyzer software and equivalent circuit consisting of two parallel R-CPE elements connected in series were applied for the investigation of relaxation ...

  • Surface functional groups and degree of carbonization of selected chars from different processes and feedstock

    Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)
    The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...
    Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS
    ... shows a broad double peak from 5—29". The lower peak is shifted to lower angles compared with the fast pyrolysis biochars and seems to have another source, because relicts of cellulose can be excluded due to the long contact time at 550 "C. The reason for this peak could not be identified. For BW550s ...
    ... instruments due to the potential sublimation of phosphorous pentoxide in the vacuum. SW500f was made via fast pyrolysis by Pytec GmbH, Hamburg, Ger- many, in an ablative reactor at 500 "C with a contact time of < 2 s from chopped spruce (Picea spec.) wood chips after drying to a moisture content ...
    ... of carbonization is higher than for M200h for which the composition is similar to values in the literature [77]. This might be a consequence of a longer reaction time. The high oxygen value of PW700g is partially due to the high ash con- tent. The upper limit of the oxygen bound in the inorganic ...

  • Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine

    Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)
    The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...
    Fuzzy theory, hydraulic excavator, selection, quality of service, asset management

  • OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian

    Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević (2024)
    Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...
    aspekt glagola, lingvistički otvoreni podaci, BCS

  • Геомагнетни премер на секуларној станици KELE-1001 (Келебија) у мају 2018. године

    Панта Андрејић (2024)
    У овом раду је приказана методологија геомагнетног премера на секуларној станици Келебија. Мерења су изведена у периоду од 08. до 12. маја 2018. године и састојала су се од регистрације дневних варијација, мерења апсолутних вредности угловних елемената и компонената вектора геомагнетог поља и одређивања астрономског севера. Овај вид мерења се често назива магнето-варијациона мерења и саставни су део државног геомагнетог премера за праћење и проучавање геомагнетног поља у систему простор-време.У оквиру обраде података израчунате су апсолутне и базне вредности ...
    секуларна станица, регистрација варијација, апсолутна и базна мерења
    ... TeOMaTHCTHOrT IIpeMepa cekyJ1apHHx cTaHHIa. JIMTEPATyYPA 1. Bartels J., “Discussion of Time-Variations of Geomagnetic Activity, Indices Kp and Ap, 1932-1961”, Extrait des ANNALES DE GEOPHISYOUE; Tome 19, No.l.; Janvier- Mars 1963. . MwxajnopBuh J.C.:"Mopdozoruja BapHjarmja reoMarHeTCKoT IIOJba ...
    ... MarHeToMeTpa — Magson 11. Ha pacrojapy ojr 30 no 40 m oJ Te no3HNHje, Ha HECMAaTHECTHUHOM CTaTHBy, OMO je IHIOCTaBJbĆH CCH3Op HpOTOHcKor HmpenecHoHor MarHeToMerpa GSM 19. Ha ynajbeHocTH OJ OKO 20 m, Ha 4 Cpe)HHH H3Meby no3HIHje CeH3Opa Ta )IBa MaTrHCTOMCTpa, OHO jc HOCTABJbCH JUDBCHH CaHJLyK, ...
    ... 2006; GEOMAGNETIC FIELD MEASUREMENTS AT REPEAT STATIONS IN FORMER YUGOSLAVIA:; Geomagnetics for Aeronatical Safety, NATO Security trough Science Series — C: Environmental Security; ISBN 1- 4020-5024-0; p.p. 43- 57.; Springer; 2006. SPOMENKO J. MIHAJLOVIĆ, ALEKSANDAR ĐORĐEVIĆ, RUDI ČOP, (2010): ...

  • Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2017)
    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 ...
    ... through the entire collection becomes time consuming and inefficient, as the recall grows but precision is likely to drop considerably. Thus in the case of large collections, an additional representation of the document content is generated, formally referred to as the document surrogate, with the aim ...
    ... personal, geopolitical, organizational, etc. Named Entity Recognition. According to [19] the term “Named Entity” (NE) usually refers to names of persons, locations and organizations, and numeric expressions including, time, date, money and percentage. Recently other major types are being included, like ...
    ... Uszkoreit, H. (eds.): META-NET White Paper Series. Springer, Heidel- berg (2012). http://www.meta-net.eu/whitepapers 21. Robertson, S.E., Walker, S.: Okapi/Keenbow at TREC-8. In: TREC, vol. 8, pp. 151–162 (1999) 22. Salton, G., McGill, M.J.: Introduction to modern information retrieval (1983) 23. Stanković ...