Претрага

Упит dcterms_subject_txt:quality of service

2843 items

  • 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

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... from the aspect of the quality of recipient water, not requiring the control of the effluent. On the basis of threshold values of the quality parameters set by the Decree on Classification of Waters, all water flows in Serbia are classified into four classes. The basic principle of domestic regulation ...
    ... Marijana Prodanović study of Atanacković et al. (2013), examining the quality of mine waters from 21 abandoned mining sites. As regards the quality of drinking water, research conducted by the Institute of Public Health of Serbia (2015) showed that out of 83,947 samples of drinking water from public ...
    ... potentials. A large share of the resources has been classed as inferred because of the unfavorable conditions of exploitation, poor quality of the ore, problems of the processing technology or undefined technical and economic conditions of exploitation. Boron The deposits of boron are located in ...

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... (ordovicijum-devon) između Resave i Nišave, istočna Srbija. [Stratigraphy of the Lower Paleozoic (Ordovician-Devoni- an) between rivers Resava and Nišava – eastern Serbia – in Serbian, with an English summary].– Mémoires du Service Geologique et Geophisique, 22, 1–64. Belgrade. KRSTIĆ, B. & SUDAR, M. ...
    ... at an angle of 40 to 50°. Varia- tions of the dip directions of bedding planes and their dip angles are due to the deformed state of the whole unit. Deformational fabrics are composed of a series of cleavages which significantly disrupt the primary sedimentary structures. Development of seve- ral ...
    ... modes of transport was limited by the insufficient quantity of the obtained sedimentological samples. This led to the use of fossils as an in- dicator of hyperpycnal transport. The presented study could be used as a starting point for a more detailed petrological analysis of the provenance of the ...

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...
    ... analysis of necessary airflow volumes for the ventilation of individual workplace locations, often featuring a very complex geometry. The application of CFD software improves the reliability and quality of the apprehension and verification of air amounts needed for the ventila- tion of workplaces ...
    ... depiction of the ventilation system linear scheme, graphical presentation of results and communication with other modules in the INVENTS hybrid system. The classes related to user services communicate with classes at the business service level by sending messages that initiate the execution of specific ...
    ... which lead to an unfavorable estimation of the air loss characteristic of the ventilation system state. In addition to that, the value of the airflow loss frequency parameter in the system, which is the ratio of the number of air loss branches and the total number of branches, was 0.28 (5/18). This value ...

  • Geonasleđe Golije i Peštera

    Ljiljana V. Grujičić-Tešić (2017-09-01)
    Sprovedena istraživanja u ovoj studiji obuhvatila su izdvajanje, opis, evaluaciju i valorizaciju objekata geonasleđa u cilju razvoja istraživane oblasti sa stanovišta geonauka, geoturizma i geoekologije. Na izučavanom području objekti geonasleđa su evidentirani, interpretirani, vrednovani i kategorisani, dat je predlog promocije geoobjekata, i na kraju predložena dopuna inventara objekata geonasleđa Srbije.U protekle četiri godine, na kompleksu geotopa Golije i Peštera istražena su geološka svojstva stena (tip stene, starost, fosilni sadržaj, morfološke i hidrogeološke karakteristike itd.), na osnovu čega je bilo ...
    geodivezitet, geonasleđe, geoturizam, geokonzervacija, Golija, Pešter
    ... Commission. Parks & Wildlife Service. Tasmania. Occasional Paper 32. Dixon, G. (1996a): Geoconservation: An International Review and Strategy for Tasmania. Parks & Wildlife Service. Tasmania. Occasional Paper 35. Dixon, G. (1996b): A Reconnaissance Inventory of Sites of Geoconservation Significance ...
    ... Giusti (2005): Methodological proposal for the assessment of the scientific quality of geomorphosites. Italian Journal of Quaternary Science. Italia. 18 (1). pp.307 - 313. Ljiljana V. Grujičić - Tešić Doktorska disertacilja GEONASLEĐE GOLIJE I PEŠTERA 162 Cvetković, V., Prelević ...
    ... Principles of Geoconservation. PDF Document. Tasmanian Parks & Wildlife Service website. Schmid, M.S., Bernoulli, D., Fügenschuh, B., Matenco, L., Schefer, S., Schuster, R., Tischler, M. & Ustaszewski, K. (2008): The Alpine – Carpathian - Dinaridic orogenic system: correlation and evolution of tectonic ...

  • Енергетска безбедност Европске уније у светлу актуелне енергетске транзиције

    Бобан Павловић, Дејан Ивезић (2021)
    Енергетска стратегија Европске уније, која од 2015. године обухвата и циљеве у области климатских промена, тежи изградњи „енергетске уније” која потрошачима из ЕУ даје сигурну, приступачну, чисту и одрживу енергију. Енергетска политика ЕУ поставља пред себе амбициозне циљеве у погледу коришћења обновљивих извора – учешће од 32% до 2030. године. Овако опсежну и динамичну енергетску транзицију у Европи усложњава хетерогеност националних енергетских система у погледу структуре енергетског микса, нивоа увозне зависности, као и нивоа технолошког, друштвеног и економског ...
    енергетска безбедност, Европска унија, енергетски показатељи, природни гас, обновљиви извори енергије
    ... Research Service, within the Directorate-General for Parliamentary Research Services (EPRS) of the Secretariat of the European Parliament, Brussels, 2020, https://www.europarl.europa.eu/cmsdata/210517/EPRS_IDA(2020)6493 34_EN.pdf. 8. EC, European Commission, The euro in the field of energy, EC ...
    ... Regulation (EU) 2019/941 of the European Parliament and of the Council of 5 June 2019 on risk-preparedness in the electricity sector, EU 2019/941, 2019, https://eur-lex.europa.eu/legal- content/EN/TXT/?uri=uriserv:OJ.L_.2019.158.01.0001.01.ENG. 12. EU, European Union, Regulation of the European Parliament ...
    ... радовима запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository ...

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... Industrial, storage and service areas and transport terminals without residential buildings At the border of this zone, the noise must not exceed the limit value in the zone with which it borders Energies 2021, 14, 6174 7 of 15 Modeling the spread of noise, i.e., prediction of the noise level ...
    ... necessary in order to minimize subjectivity in the process of expert evaluation, the application of which is characteristic of SEA. These facts have an additional impact on the quality of the SEA process in the planning and spatial determi- nation of wind farms and, thus, their importance in implementing ...
    ... groups of criteria, with a total of 11 individual criteria, relating to: size (intensity) of impact; spatial dimensions (spatial dispersion) of impact; the likelihood that some of the estimated impacts will occur in reality; and frequency (dura- tion) of impacts (Table 2). Application of the s ...

  • 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)
    ... This work was supported by the Ministry of Sciences and Technological Development of the Republic of Serbia, project No, 127011. We are thankful to the German Academic Exchange Service for the financial support of our bilateral cooperation between the Institute of Nuclear Sciences Vinča in Belgrade ...
    ... penetration of tumor cells into the healthy tissue. We can only speculate that potential inhibitory effect of metallo- drugs on the secretory PLA2 might slow down the process of protrusion of tumor cells by decreasing the concentration of mediators of cellular signaling, such as metabolites of arachidonic ...
    ... signal-to-noise ratio of peaks corresponding to adducts of LPC 16 : 0 is used to calculate their concentration, following the equation: c(product) = (S/N of product peak)(c of int. std.)/(S/N of internal standard). In all cases we considered mass peaks corresponding to sodium adducts of product LPC 16 ...

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... the quality of the input data, the assumptions made to set up the model design and the selection of the appropriate performance metrics (PETSCHKO et al. 2014). Furthermore, the evaluation of reliability consists of changing some of the model integral parts and obtaining numerous variations of the ...
    ... sensitivity to the quality and accuracy of the input thematic data and particularly to the landslide inventory used to train the model, (2) the absence of expert opinion which may result in a satisfactory statistical output in terms of degree of fit, but may not be realistic in terms of physical meaning ...
    ... technique it is only possible to produce a landslide in- ventory with undifferentiated mechanisms of landslide move- ment. Therefore, to improve the quality of the inventory map, and consequently the quality of the validation processes, further land- slide susceptibility studies in the region should be supported ...

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... Sucker Rod Pump 10 3.1.1 Plunger of a Sucker Rod Pump The plunger of a deep well pump is crafted from high-quality steel tubing. A molten metal layer is applied to the heated surface of the plunger, which is then ground and polished. The outer surface of the plunger features U-shaped channels ...
    ... Class K sucker rods are employed [3]. The operational life of sucker rods depends on the quality of the material as well as the working conditions, including: maximum stress, the range of maximum and minimum stress, and the number of strokes per minute. All these factors affect material fatigue ...
    ... liquid flow through the annular space of the anchor reduced to the full cross-section of the annular space of the anchor without gas (m/s) 3.3 Sucker Rods Sucker rods are manufactured from high-quality steel with a solid round cross-section and are used to transmit energy from the surface equipment ...

  • Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling

    Branislav Petrović, Veljko Marinović, Zoran Stevanović (2023)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Српски језик у дигиталном добу -- The Serbian Language in the Digital Age

    Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)
    Serbian language
    ... SpeechProcessing: uality of existing speech recog- nition technologies, quality of existing speech syn- thesis technologies, coverage of domains, number and size of existing speech corpora, amount and va- riety of available speech-based applications ‚ Machine Translation: uality of existing MT tech- nologies ...
    ... coverage of linguistic phenomena and do- mains, amount and variety of available applications, quality and size of existing (annotated) text corpora, quality and coverage of existing lexical resources (e. g., WordNet) and grammars ‚ Resources: uality and size of existing text corpora, speech corpora ...
    ... online shop; ‚ follow the spoken directions of a navigation system; ‚ translate Web pages via an online service. Language technology consists of a number of core ap- plications that enable processes within a larger applica- tion framework. e purpose of the META-NET lan- guage white papers is to focus ...

  • 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

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... McElhinney, M. W. (1990). Classification of the reversal test in palaeomagnetism. Geophysical Journal Interna- tional, 103, 725–729. Mićić, I. (1980). Contact, pneumatolytic and hydrothermal alter- ations in igneous rocks of Kopaonik region.Memories du service geologique et geofisique, Vol. XIX, 1-138 ...
    ... Serbia). MSc thesis, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia, 108 pp. (in Serbian). Gajić, V. (2014). Sedimentology of Upper Cretaceous of the central part of the Vardar zone. Ph.D. dissertation, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia ...
    ... dome of Beli Kamen (Mt. Rudnik, Central Serbia) – the example of a specific interaction of lamprophiric and granitoid magma. In S. Karamata & S. Janković (Ed.), Geology and Metallogeny of the Dinarides and the Vardar zone, (pp. 255–267). The Academy of Sciences and Arts of the Republic of Srpska ...

  • Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise

    Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín (2023)
    Multidisciplinary

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима

    Radiša D. Đurić (2016-05-30)
    Оцена расположивости представља основну компоненту уинжењерском управљању опремом. Расположивост је свеобухватни концепткоји представља меру употребног квалитета техничких система, који садржичитаву серију парцијалних индикатора који се односе на време у раду ивреме у отказу система као и на његову функционалну погодност. Овадисертација даје структурну анализу парцијалних индикатора као и развојмодела њихове синтезе на ниво расположивости. Поменути подаци имајухибридни карактер (измерени и експертски добијени) и њихова интеграцијаи синтеза је остварена коришћењем фази пропозиције и фази закључивања.Овакав приступ омогућава оцену техничког система ...
    управљање опремом, инжењерство одржавања,расположивост, фази закључивање, прикупљање података, булдозер
    ... CONCEPT IN DEFINING OF THE EFFICIENT AUXILIARY EQUIPMENT MAINTENANCE IN SURFACE MINING ABSTRACT Availability evaluation is one of basic components for engineering asset management. Availability is overall concept representing measurement for quality of service level of analyzed engineering ...
    ... производног процеса. Поузданост и погодност одржавања представљају најзначајније теоријски развијене концепте у анализи употребног квалитета (quality of service) техничких система. Концепт расположивости који је касније ушао у употребу, покушава да истовремено да опише понашање техничког система током ...
    ... 2007. Systems Maintainability and Reliability, The Research Center of Dependability and Quality management DQM Lei, Y., 2008. Evaluation of three methods for estimating the Weibull distribution parameters of Chinese pine. Journal of Forest Science; 54(12): 566– 571. Murthy, D.N.P., Xie, M., Jiang ...

  • Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema

    Svetlana M. Štrbac-Savić (2016-06-10)
    Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...
    podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacija
    ... Compesation for the thermal error of a multi-axis machining center, Journal of Materials Processing Technology 75, pp. 45-53, 1998. [WANG12] X.Wang, “Grey Relational Analysis of Teaching Skills and Learning Results of Aerobics”, Advances in information Sciences and Service Sciences, Vol. 4, pp. 321-328 ...
    ... Joutnal of Huayhong University of Science and Technology, 9, pp.11-16, 1982. [ZHANG86] Zhang Dianqing, Grey relational analysis of the shape function and the level of body quality for youngsters and children, Sport Science in Guizhou Province, 2, pp.1-5, 1986. [ZHAO87] Zhao Songnian, On ...
    ... working days, and degree of use of production capacity, as input variables, and Degree of Operating Leverage (DOL) as indicator of operational efficiency of an existing underground mine. Multivariable grey model is used to establish the time sequence response formula of DOL. This formula enables ...

  • Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije

    Jelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar (2023)
    Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...
    mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacija