Претрага

Упит dcterms_subject_txt:crystal structure

445 items

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

    Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas (2011)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion
    ... to the MWU dictionary, the local grammar covers the aforementioned structure as well. This example leads us to possible applications related to inflection of free noun phrases based on the recognition of their syntactic structure. This idea draws from the assumption that many free noun phrases (used ...
    ... syntactic structure as a MWU, and that the inflectional transducers developed for MWUs could be applied to inflect free noun phrases as well. For example, in the phrase kućni aparati prošlogodišnje proizvodnje ‘home appliances of last year’s production’ our procedure would recognize a structure that ...
    ... besides these basic structures, e.g. can a MWUs have plural forms, can a separator be omitted or replaced by another separator, etc. The basic structure, however, determines the general form of a lemma and information that has to be supplied. Thus, automatic production of the lemma for petokraka ...

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

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

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić (2019)
    Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...
    мио-плиоценска геодинамика, јужни Панонски басен, Авалски и Торлак хорст, Белопоточки трог, Србија
    ... The Beli Potok trough is an interesting structure because within the Avala structural unit there are differential movements of the faults separating the lo- cal blocks. In the previous studies (e.g. LASKAREV, 1931) the existence of a large linear structure, the so-called the Rakovica fault was noticed ...
    ... spatial relationships are interpreted in the context of pronounced block structures (Torlak, Beli Potok and Avala). Torlak Hill represents a horst structure with a core composed of Mesozoic rocks and hillsides composed of the Middle Miocene sediments, which are present at the surface at altitudes up ...
    ... was probably controlled by the NE– SW striking Torlak fault as well as the E–W directed Rakovica fault and its segments (Figs.17 and 21). This structure defines the northern edge of the Beli Potok trough which repre- sents the area of subsidence filled by the Upper Miocene sedi- ments (Figs. 17 and ...

  • Formative evaluation of e-learning projects with the logical framework approach

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... helped in reviewing the project structure. As shown in Figure 3, the LFM used for BAEKTEL, was developed just following some basic, even coherently linked, questions. The project proposal has been financed, thus providing a positive feedback about the structure of activities, resources, assumptions ...
    ... reveals in the long term, within 7-10 years) [11]. A 'cause-effect' relation regulates the mechanism of creation of outcomes and impacts, whose structure can be linear or systemic (complex). Linearity and Complexity of the cause-effect relations among the results of a project, are quite important ...
    ... method, or the mental attitude, or the particular perspective by which the evaluation is gathered, while the model is the description of the structure and/or function of the object it represents. Many EMs exist. Stufflebeam [20] identified 22 approaches, Linzalone and Schiuma [21] distinguished ...

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... have various syntactic structures, as presented in Table 4. Also, MWUs having the same syntactic structure need not all belong to the same super-class. Such is the case for MWUs with the syntactic structure noun/noun in the genitive. The plural forms of such MWUs, in the case that they exist, can be: ...
    ... to the MWU dictionary, the local grammar covers the aforementioned structure as well. This example leads us to pos- sible applications related to inflection of free noun phrases based on the recognition of their syntactic structure (as shown by successful processing of specific LIS terms in pervious ...
    ... Faren- hajtov. 2. How does this MWU inflect and which inflectional transducer should be used for it? The two example MWUs have an adjective/noun structure and allow a reverse order of constituents, therefore inflectional transducer NC AXNr should be used. 3. Which MWU constituents inflect? In our example ...

  • Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations

    Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović (2024)
    Monitoring Network, data, hydrogeological environment, tunnel, simulation

  • 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

  • Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes

    Aleksandar Mijatović, Jovana Bogojeski, Biljana Petrović, Živadin D. Bugarčić (2011)
    Reakcije supstitucije monofunkcionalnih kompleksa [(TLtBu)PdCl]+ i [Pd(tpdm)Cl]+, gde je TLtBu = 2,6-bis[(1,3-di-terc-butilimidazolin-2-imino)metil]piridin i tpdm = terpiridindimetan, sa nukleofilima kao što su: tiourea, I−, Br−, NO2−, piridin i dimetil-sulfoksid (DMSO) proučavani su u 0,1 M vodenom rastvoru NaClO4 u prisustvu 10 mM NaCl. Reakcije su sprovedene na tri različite temperature (288, 298 i 308 K) korišćenjem tehnike zaustavljenog protoka na različitim temperaturama. Reakcije supstitucije su praćene pod uslovima pseudo prvog reda sa velikim viškom nukleofila. Dobijeni rezultati pokazuju da kompleks ...
    Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
    ... tpdm ligand they are separated by methylene groups, so the system is more flexible in comparison with terpyri- dine. This is confirmed by the crystal structure of the [Pd(tpdm)Cl]+ complex [24]. Observed results clearly illustrate that a relatively small structural modification of the tridentate ligand ...
    ... for the entropy of activation confirmed the associative substitu- tionmode. These results are discussed in order to find the connection between the structure and reactivity of the complexes with tridentate sterically hindered ligands. � 2011 Elsevier B.V. All rights reserved. 1. Introduction Coordination ...
    ... amino alcohols, such as L-pro- linol, L-valinol, L-isoleucinol show certain antitumor activity [20]. As a part of our interest in the synthesis, structure and reactivity of coordination complexes of Pd(II) with chelating ligands [1–6,21,22] and with the aim to contribute towards our previously publishedwork ...

  • 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
    ... 3 in Fig. 8c). Structure 2 accom- modates a larger amount of deformation (Fig. 8e, cross-sections a-a’, b- b’). Its associated sedimentary infill is affected by subsequent dextral strike-slip faulting (structure 4) that cuts through the basin and transfers most offset from structure 2 (Fig. 8c). These ...
    ... the mobile sheet (Fig. 3c and d), all Riedel shears are connected and the main N–S ori- ented strike-slip fault (structure 2) represents a thoroughgoing strike- slip system. This structure is characterized by a change in fault dip angle, from sub-vertical in the north to steeply eastward-dipping in ...
    ... Furthermore, the final dextral offset along the main strike-slip fault (structure 2) decreases towards south from ~6 cm to <2 cm (see the offset in black and yellow marker lines in top view, Fig. 3e). The initial strike-slip structure (1 in Fig. 3e and f) and the main strike-slip fault (2 in Fig. 3e and ...

  • Cultural Heritage and Protection of Hand-Wheeled Pottery Manufacture in Western Serbia: Characteristics of Zlakusa Pottery Based on Sem-Eds and Optical Microscopy

    Milošević Maja, Zdravković Alena, Đordjević Biljana, Jelić Ivana (2021)
    ... random orientation and size, indicating slower rotations of the potter’s wheel during the manufacturing process. Sample 2 has a specific fluid-structure that is consistent with the way it was fabricated. By the size and orientation of the pores, it is evident that the pot was manufactured by ...
    ... clay mixture uniformly distributed with larger, mostly rounded pores, consistent with microscopical observations. Sample 2 has a fluid- like structure where both groundmass and pores have a directional appearance, consistent with previous observations, and a slightly higher amount of calcite ...

  • Geoloski profil planine Avale (severna Šumadija) - uvid u litostratigrafiju i tektonske strukture

    Marinko Toljić, Bojan Glavaš-Trbić, Maja Maleš, Nikola Ranđelović (2022)
    Mezozojske formacije Šumadije dele tektonsko-stratigrafsku evoluciju južnijih delova suture jedinica Adrijskog i Evropskog afiniteta, uključujući gornjojursku obdukciju, krednu subdukciju i paleogenu kontinentalnu koliziju. Finalni rezultat dugovremene evolucije u geodinamički složenom ambijentu su komplikovani tektonski i litostratigrafski odnosi različitih mezozojskih formacija suture. Geološki profil kroz planinu Avalu omogućava uvid u skoro potpunu sukcesiju mezozojskih formacija i prostorne pozicije i kinematiku značajnih tektonskih struktura najsevernijih segmenata suture u Šumadiji. U tektonskom kontekstu, mezozojske formacije okoline Beograda najčešće su interpretirane kao deo Istočne ...
    sutura, parafliš, bazalna navlaka, transkurentni rased

  • Investigation of nanostructured Ca0.9Er0.1MnO3 obtained by sucrose nitrate procedure

    Tijana B. Vlašković, Bojana Laban, Maja Milošević, Maria Čebela, Vladimir Dodevski, Milena Rosić (2023)
    ... of the Republic of Serbia, P.O. Box 522, 11001 Belgrade, Serbia,University of Belgrade Nano-crystalline CaooEro,, MnOa oxide with a perovskite structure was synthesized by the sucrose nitrate procedure (SNP), with the help of sucrose, which plays the role of fuel and complexant. Other chemicals ...
    ... pentahydrate Er(NOay)ax5H»O. Metal nitrates and sucrose were mixed in stoichiometric ratios, in order to obtain a perovskite with a crystalline structure. The resulting: CapEro,, MnOxy is calcined for 15 minutes in the temperature range from 800% to 1000%. Diffraction thermal analysis (DTA), X-ray ...

  • Zn1.86Cd0.14(OH)VO4

    Đorđević Tamara, Stojanović Jovica, Karanović Ljiljana (2010)

  • Towards a Mining Equipment Ontology

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... mining terminology in Serbian. RudOnto is presently implemented within SUKU, a mining engineering information system, also developed at FMG. The structure of this resource places RudOnto between a taxonomy and a thesaurus on the semantic scale, with the final goal of upgrading it into an ontology. One ...
    ... In general, terminological resources in e-format can be organized in different ways and serve different purposes. Depending on their content, structure, and organization, terminological resources can be classified as indexes, glossaries, taxonomies, thesauruses and ontologies. Basically, each of ...
    ... higher hierarchical level. As we have already mentioned, such hierarchical classification of concepts are taxonomies, usually represented by a tree structure. However, many other semantic relationships that might exist between concepts, such as holonymy/merony (parto of), antonymy, derived form, etc. ...

  • Building Terminological Resources in an e-Learning Environment

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja (2012)
    ... explain them in more detail. Thesauruses offer and even more complex semantic structure, and due to this complexity, they are very often confined to a specific domain. Besides displaying a richer semantic structure through more elaborate semantic relations such as holonymy/meronymy (part of) and ...
    ... on the other. Although developed within the IT environment, thesauruses are thus primarily intended for human use. The most complex semantic structure is offered by ontologies, although boundaries set between thesauruses and ontologies in literature differ. Some authors even tend to consider ...
    ... such as "has/is constructive characteristic (of)" or "has/is technological parameter (of)". By the introduction of such relations the semantic structure of RudOnto acquired features of semantic network. As RudOnto is a multilingual resource, another type of relations is introduced, namely those ...

  • Knowledge and Rule-Based Diacritic Restoration in Serbian

    Cvetana Krstev, Ranka Stanković, Duško Vitas (2018)
    In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).
    diacritic restoration, morphological dictionary, corpus, word n-grams, local grammars
    ... WordNet-like model of knowledge representation and de- scribe some applications of RuThes-like resources for text analytics. We also consider the structure and current state of RuWordNet, WordNet-like Russian thesaurus, semi-automatically generated from RuThes data. The specificity of RuWordNet generation ...
    ... (Gelfenbeyn et al., 2003), (Balkova et al., 2008), attempts were made to automatically translate WordNet into Russian, with all the original thesaurus structure preserved. The results of (Gelfenbeyn et al., 2003) have been published1, but the analysis of the thesaurus generated in this way shows that it requires ...
    ... (Lipscomb, 2000), (Kupriyanov et al., 2016). 1wordnet.ru 2https://russianword.net/ Proceedings of CLIB 2018 94 3. RuThes Family of Resources The structure of the RuThes thesaurus of the Russian language is based on three approaches for devel- oping computer resources: information-retrieval thesauri ...

  • The state and perspective of the natural gas sector in Serbia

    Dejan Ivezić, Marija Živković, Dušan Danilović, Aleksandar Madžarević, Miloš Tanasijević (2016)
    The strategy of long-term energy development of Serbia identifies an increase of share of natural gas in final energy consumption as one of the main aims. Serbia has signed a strategic agreement with the Russian Federation on cooperation in the oil and gas sector, within which the project South Stream pipeline is planned to be realized. In addition, the Republic of Serbia has signed the Treaty that establishes the Energy Community and accepted the obligation to implement the Energy ...
    Consumption, natural gas, scenarios of development

  • Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)
    ... features and morphology was conducted to determine the characteristic attributes for a specific technique. Phase and mineral composition, texture, and structure of the samples were analysed by microscopy of cross-section preparations perpendicular to the vessel walls (Leitz polarization microscope). The ...
    ... stands out. A microscopic examination of the thin sections revealed a uniform mineral composition and porosity. For sample -5- a specific fluid-structure is consistent with the way it was introduced by the application of a mould. The measurements of moisture absorption showed that in this respect ...

  • Terminology Acquisition and Description Using Lexical Resources and Local Grammars

    Cvetana Krstev, Ranka Stanković, Ivan Obradović, Biljana Lazić (2015)
    Acquisition of new terminology from specific domains and its adequate description within terminological dictionaries is a complex task, especially for languages that are morphologically complex such as Serbian. In this paper we present an approach to solving this task semi-automatically on basis of lexical resources and local grammars developed for Serbian. Special attention is given to automatic inflectional class prediction for simple adjectives and nouns and the use of syntactic graphs for extraction of Multi-Word Unit (MWU) candidates for ...
    ... plural forms), and to 14 (2%) of them an incorrect class was assigned. 4 Syntactic graphs for MWU recogni- tion 4.1 Structure of terms in termbases In order to analyze the structure of terms in dif- ferent domains, primarily the number of compo- nents they consist of, we used samples from three t ...
    ... to their syntactic structure, or more precisely, according to the information needed for their inflection. The names of classes correspond to the names of special FSTs that are used for MWU inflection. For instance, the class AXN pertains to MWUs with the syntactic structure: an adjective (A) fol- ...
    ... times, MWUs with different syntactic structure belong to the same class. For instance, the class N4X implies that MWUs belonging to it consist of a noun followed by two other components (separated by two separators) that do not inflect. The syntactic structure of these components can be a noun followed ...