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Упит dcterms_subject_txt:hammer with spikes

1049 items

  • 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
    ... River valley; note intensive folding; C, thin-bedded limestones with single bed of thick-bedded massive limestone; D, chert nodules in limestones; large pink nodule in the lower part of photo; small dark-grey nodule above the hammer). 20 Geol. an. Balk. poluos., 2019, 80 (1), 17–27 Late Triassic ...
    ... veins and with common lay- ers and nodules of white and pink cherts. Thin-platy limestones (with thickness of layers less than 10 cm) are predominant, while the beds with thickness of more than 0.5 m are represented by massive grey lime- Table 1. Presence and abundance of radiolarian taxa in samples ...
    ... hemipelagic deposits of moderate thickness (up to several hundred meters), which are represented by platy cherty limestone intercalated with marl and clay, in parts with coarser-grained al- lodapic layers and common chert nodules and layers, are known in the Internal Dinarides under the name of “Grivska ...

  • Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian

    Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić (2020)
    The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...
    Part-of-Speech tagging, lemmatization, corpus, evaluation, Serbian, morphological dictionary
    ... Evaluation results of spaCy model are compared with the results obtained by the TreeTagger trained on the same dataset, as well as with a previous version of TreeTag- ger for Serbian (Utvić, 2011), and discussed in Section 4. The paper ends with concluding remarks and an outline of future work ...
    ... 2020. 3960 Figure 4: Results of PoS-tagging with SerSpaCy tagger on different test sets and for different PoS-tags Figure 5: Results of PoS-tagging with TT19 tagger on different test sets and for different PoS-tags Figure 6: Results of PoS-tagging with TT11 tagger on different test sets and for different ...
    ... Besides the use of dif- ferent annotating schemata, these issues were: • Some texts were fully annotated, with lemmas and all grammatical categories (1984, Verne), some were only lemmatized with assigned PoS (Intera, Švejk, Floods, History), while in one text (Novels) values of the grammatical category ...

  • 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

  • Bilingual lexical extraction based on word alignment for improving corpus search

    Jelena Andonovski, Branislava Šandrih, Olivera Kitanović (2019)
    Library and Information Sciences,Computer Science Applications

  • Development of an Integrated Model for Open-Pit-Mine Discontinuous Haulage System Optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević, Dejan Stevanović (2024)
    The selection of the optimal equipment for discontinuous haulage systems is one of the most important decisions that need to be made when an open-pit mine is designed. There are a number of influencing factors, including natural (geological and environmental), technical, economic, and social. Some of them can be expressed numerically, in certain units of measure, while others are descriptive and can be stated by linguistic variables depending on the circumstances of the project. These factors are characterized by ...
    rudarska mehanizacija, znanje eksperta, lingvističke varijable, FAHP

  • Human factor risk management procedures applied in the case of open pit mine

    Snežana Kirin, Aleksandar Sedmak, Wei Li, Miodrag Brzaković, Igor Miljanović, Ana Petrović, Simon Sedmak (2021)
    Risk management aims to provide a controlled work environment to ensure the safe operation of the high-risk systems. It is a dynamic process which work in a continual state of change. The issue of human factor risk and rules and regulations in open pit mine is a main focus of this paper in order to develop predictive models of behavior of workers in relation to compliance with the procedures and rules. Presented survey was conducted in open pit coal ...
    Upravljanje rizikom, ljudski faktor, bager sa kašikom, metod konačnih elemenata

  • The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station
    ... equipment into the urban industrial environment. In addition, an analysis of the available waste composition data and their comparison with the total mass of waste with data from different parts of the world and the average data for Serbia. 4. ANALYSIS OF GEOTECHNICAL CONDITIONS FOR THE CONSTRUCTION ...
    ... waste disposal. However, on the southern part of the site, the surface is built of municipal waste covered with inert earth material (Figure 2). Figure 2. The situation of the terrain with the original schedule of the transfer station facilities In addition to the significant deviation related ...
    ... mainly a construction material with rare fragments of brick and concrete, but gravel fragments and industrial slag are also found. At some thin intervals, municipal waste zones were also observed, most likely occurring during the spreading of the surface cover part with construction Proceedings ...

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... file, with 133 452 points. Definition of the source area was made by comparing DTMs of different sequences (Krušić et al. 2019). Herein, a simulation with subtraction of release area, which has an influence on the movement of material, is appended. Selected rheology law is frictional with Voellmy ...
    ... and multiphase moving mass as a single-phase continuum. The others are considering two phases, solid and liquid, i.e. a granular skeleton with voids filled with either water or mud. If the shear resistance of the fluid phase can be neglected, the stress tensor in the mixture can be decomposed into ...
    ... defines propagations of mass as mixture of soil and water particles with calculation of velocity. In addition, calculation of pore water pressures propagation is possible to be obtained using Finite Difference Method coupled with two- phase model. Herein, just results of two-phase model propagation ...

  • 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
    ... (Meka Gruda), in outcrops with layers of grey limestone with organic-rich laminae. �e Eocene sedimentary rocks were sampled in the west, near Nevesinje (Kljen in the southeast), in a series consist- ing of brown and grey to dark grey, layered limestone banks, interbedded with carbonaceous marl. �e sample ...
    ... (Meka Gruda), in outcrops with layers of grey limestone with organic-rich laminae. The Eocene sedimentary rocks were sampled in the west, near Nevesinje (Kljen in the southeast), in a series consist- ing of brown and grey to dark grey, layered limestone banks, interbedded with carbonaceous marl. The sample ...
    ... sample 1 (T) with marine alginite (Triassic; Klobuk) and the sample 12 (K) with lamalginite (lam) and bituminite (bit) (Cretaceous; Pridvorci). Oil immersion, incident blue light, 50x. Fig. 7. Histogram of vitrinite (huminite) reflectance measurements in Miocene coal sample (Gacko lignite) with a representative ...

  • Projecting short to medium-term effects of carbon emissions trading on Serbia's GDP

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... affecting the national economies in non-EU regions (Verde and Borghesi, 2022). Non-EU countries seeking to join the EU and countries with substantial trade with the EU have various options for introducing instruments to reduce greenhouse gas emissions, including introducing their own ETS or paying ...
    ... significantly contributing to the nation's economic stability. In terms of energy, Serbia, along with other Western Balkan countries, has joined the Energy Community, committing to gradually aligning with EU rules (Pavlović et al., 2021) aimed at reducing GHG emissions, saving energy, and making the ...
    ... the ETS price in 2030 could be 75 E (scenario with moderate ETS prices). Scenarios 2 and 3 (response measures scenarios) rely on more ambitious estimates (CRU, 2022), which anticipate that the ETS price will reach 150 C in 2030 (scenarios with higher ETS prices). Fig. 7 shows the projected ...

  • 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

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia
    ... considered as sustainable 2. Primary energy consumption in the world is characterized with a constant growth and the dominant share of fossil fuels of 79.7% 3. The renewable energy source with the highest share is biomass with 6%. Fossil fuels and biomass make more than 85% of the primary energy need to be ...
    ... pollutant emissions. Industry is responsible for 27.62% of final energy consumption, followed with the transport sector with 25.73%. From figure 4b can be seen that 63.63% of final energy is combusted with end consumers. Only consumption in industry can be considered as a controlled and regulated. The ...
    ... in Figure 3. In average about ¾ of electricity in Serbia is generated in TPPs, with average efficiency of 34.2% 8. Figure 3. Electricity generation by source Final energy consumption in Serbia in 2017 was 365047 TJ 8, with structure divided according to sectors and energy products presented in the Figures ...

  • Дефинисање геотехничких параметара еолских седимената земуснког платоа на основу лабораторијских и теренских SPT испитивања

    Ђорђе Крзман (2024)
    Циљ овог рада је био да се одреде геотехничке караткеристике предметног терена што представља полазну основу за рационално пројектовање и градњу. Истражним бушењем утврђено је да предметни терен изграђују четри лесна хоризонта и три слоја погребене земље до дубине од 22-23 m. Лабораторијским испитивањем добијени су ефективни параметри смичуће чврстоће, где се кохезија најчешће креће између c’=14 и 18 kPa, а угао унутрашњег трења f'= 25 - 30 °. Теренска SPT испитивањем уз коришћење прихваћених корелација у геотехничкој пракси ...
    лес, лабораторија, SPT, корелације, параметри
    ... lies between 90-93 (+/- 1.5m) elevation, with interlayers of sand between 93-94m above sea level. Silty to silty-sandy, with an increased content of carbonate powder along the veins, and in the lower parts concretions. Colors yellowish to light brown, with tubular macropores about 2 mm wide, rarely ...
    ... {97,&3) with ground surface elevation - recently performed Onur craTMuke neHeTpaque ca KOTOM TepeHa - HOBOM3BeneH C PT W- 27 Piezocone penetration test with ground surface elevation – (91,90) A recently performed HuBo non3eMHe Bone Ground vater table SDMT onuT ca koTOM SDMT test with ground ...
    ... lies between 90-93 (+/- 1.5m) elevation, with interlayers of sand between 93-94m above sea level. Silty to silty-sandy, with an increased content of carbonate powder along the |veins, and in the lower parts concretions. Colors yellowish to light brown, with tubular macropores about 2 |mm wide, rarely ...

  • Quantitative analysis of syllable properties in Croatian, Serbian, Russian, and Ukrainian

    Biljana Rujević, Marija Kaplar, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Jan Mačutek (2021)
    slogovi, distribucija rang-preciznost, slovenski jezici

  • Chemo-probe into the mantle origin of the NW Anatolia Eocene to Miocene volcanic rocks: Implications for the role of, crustal accretion, subduction, slab roll-back and slab break-off processes in genesis of post-collisional magmatism

    E. Yalçın Ersoy, Martin R. Palmer, Ş. Can Genç, Dejan Prelević, Cüneyt Akal, İbrahim Uysal (2017)
    Post-collisional Cenozoic magmatic activity in NW Anatolia produced widespread volcanism across the region. In the Biga Peninsula, in the west, medium-K calc-alkaline to ultra-K rocks with orogenic geochemical signature were emplaced at ~43–15 Ma (Biga orogenic volcanic rocks; BOVR). Volcanic activity in the Central Sakarya region, to the east, is mainly restricted to ~53–38Ma, but also continued during the Early Miocene with small basaltic extrusives (Sakarya orogenic volcanic rocks; SOVR). This study presents a new set of geochemical data ...

  • Ground surface subsidence monitoring using sentinel-1 in the “Kostolac” open pit coal mine

    Zoran Gojković, Milan Kilibarda, Ljiljana Brajović, Miloš Marjanović, Aleksandar Milutinović, Aleksandar Ganić (2023)
    Open pit coal mining affects surrounding populated areas, resulting in terrain surface deformation. Surface deformation should be monitored as often as possible to control deformations and prevent potential incidents. This paper analyzes time series deformation estimated from the Sentinel-1 satellite images using the Persistent Scatterer Interferometry method to monitor subsidence rates caused by open pit mining activities. It is possible to measure deformations using classical geodetic methods, but those are rarely used in practice because they are time-consuming and ...
    Sentinel-1 InSAR, слегање, рударствo, интерферометрија, даљинска детекција, Костолац

  • Development and Evaluation of Three Named Entity Recognition Systems for Serbian - The Case of Personal Names

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2019)
    In this paper we present a rule- and lexicon-based system for the recognition of Named Entities (NE) in Serbian news paper texts that was used to prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota tion, which were further used to train two Named Entity Recognition (NER) sys tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon based system were evaluated on ...
    NER, Named Entity Recognition Systems, Serbian, Personal Names
    ... location, event, tempo- ral, quantitative, etc) and to experiment with other ML NER methods and tools with an ultimate goal to produce a successful hybrid system. The im- portant next step is the enhancement of our news- paper corpus with other types of text (Wikipedia articles, domain texts, literary ...
    ... prepare a gold standard annotated with personal names. It was further used to prepare training sets for four different levels of annota- tion, which were further used to train two Named Entity Recognition (NER) sys- tems: Stanford and spaCy. All obtained models, together with a rule- and lexicon- based system ...
    ... overlapping is taken into account, but with some weighted value to mea- sure overlapping segment. To indicate alignment type, one can choose among the two options: the first option is greedyMatching, where the match- ing of annotations in the first and second files is done with a greedy algorithm that tries to ...

  • Combining Heterogeneous Lexical Resources

    Cvetana Krstev, Duško Vitas, Ranka Stanković, Ivan Obradović, Gordana Pavlović-Lažetić (2004)
    development of lexical resources, morphological dictionaries, WordNet
    ... ‘make shut’) is in relation CAUSES with synset [zatvoriti se:1x] (in EWN [close:8, shut:2] ‘become closed’). Also, synset [bolestan:1] (in EWN [unhealthy:1]) is in relation NEAR_ANTONYM with synset [zdrav:1] (in EWN [healthy:1]) and in relation BE_IN_STATE with synset [bolest:1x] (in EWN [illness:1 ...
    ... identical entries—that is, apparently same lemmas with identical inflectional classes and morphosyntactic information attached to them—but actually representing different lemmas that can not be distinguished. That is the 1104 case, for instance, with the double entry cyelo,N300 that represents ...
    ... Language Resource Management Tool (ILReMaT) has been developed. This tool supports the development of a wordnet in accordance with the EWN, and enables its integration with other lexical resources. This tool has been designed as a complement to the VisDic software, a tool accepted by all participants ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... of sulfur emis- sions from desulfurization power plants [2]. However, decisions about coal homogenization must deal with uncertainty and variability in coal properties, and with the effect of off-design coal characteristics on power plant performance and cost. According to Shih and Frey [3] sulfur ...
    ... tions, the uncertainty associated with the interpolated value cannot be properly incorporated [9]. As a result of the so-called smoothing effect, the variance of the estimated values is smaller than that of the original data. There are also limitations associated with the use of the kriging variance ...
    ... n n n n n n � � � �2 1 2 2 2 ( ) (6) The stockpile geometry is given with: length, width, height and slope are also input pa- rameters. The software solution give posibility to define stockpile geometry (shape) with length, width, height and slope as input parameters, that provides easy adjustment ...

  • Hydrogeological pontential of spas in Serbia, Spa Congress with international participation

    Krunić Olivera, Parlić Srđan, Jovanović Marina (2010)