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Упит dcterms_subject_txt:Izvozni tornjevi,Jugoslovenski standardi

497 items

  • Primena ubrzane konsolidacije kod izgradnje nasipa na deonici priključka Novi Beograd – Surčin autoputa ,,Miloš Veliki"

    Aleksa Tomičić (2024)
    Problem koji se javlja prilikom izgradnje objekata na ne konsolidovanom stišljivom tlu jeste pre svega vezan za prevelika sleganja tla usled opterećenja od objekata, najčešće su to objekti putne infrastrukture (nasipi), ili stambeno poslovni objekti. U tu svrhu se,primenjuju različiti vidovi ubrzanja konsolidacije tla. Stoga za potrebe izrade završnog rada Master akademskih studija studijskog programa geotehnika, na Rudarsko-geološkom fakultetu, izvršena je analiza dva najčešće korišćena postupka ubrzanja konsolidacije: predopterećenjem i ugradnjom peščanih drenova. Glavni cilj ovih postupaka je ...
    stišljivo tlo, konsolidacija, ubrzanje konsolidacije, predopterećenje, peščani drenovi

  • 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
    ... suppressor current 95 mA. A backpres- sure of #18 MPa was applied. The calibration was performed with standard solutions o Na,HPO,x·12H»O. The recovery rate was determined by spiking the sample with standard solutions of phosphate that were added to 0.2 g of AC2. The average of three recovery values ...
    ... Diffractometer in 0-0 geometry (the sample in horizontal position) in parafo- cusing Bragg-Brentano geometry using D/teX Ultra 250 strip detector in 1D standard mode with CuK, u ( = 1.54178 A) radiation source (U = 40 kV and I = 30 mA) and Ni-filtering. The XRD patterns were collected from 5—70" for 206 ...
    ... composition of the chars differs depending on the production process and the feedstock. The analytical values are given as the mean value and the standard deviation of three determinations. The analytical relative errors of the determinations of single PLOS ONE | hitps://doi.org/10.1371/journal.pone ...

  • Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia

    Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović (2017)
    ... reports (in analogue form) greatly understated the realistic number of landslides (concentrating more on urgent/acute cases), while report quality standard and consistency was uneven (because they were collected by different institutions, depending on the acute needs), so resulting inventories remain ...

  • Optimising in electrical energy consumption in mining plants

    Snežana Aleksandrović, Vesna Damnjanović, Ilija Jeftenić (2018)

  • Numerical Models of Debris Flows with Entrainment Analysis-Case Studies from the Republic of Serbia

    Jelka Krušić , Biljana Abolmasov, Miloš Marjanović (2021)
    The results of material entrainment analysis in RAMMS debris flow software, as well as numerical models of final flow heights for two case studies from the Republic of Serbia are presented. Both of debris flow cases started with initial sliding of huge volume block, prolonging to behave as flowing process. Results of the analysis showed that entrainment material affects final results of transportation model, runout distance, deposition area and volume of debris flow. In both cases entrainment volume is very ...
    tecišta, zadržavanje nanosa, RAMMS, validacija

  • Пројекат ПРИЗМА: Карактеризација и технолошки поступци за рециклажу и поновну употребу флотацијске јаловине рудника „Рудник“

    Владимир Симић, Стефан Петровић, Филип Арнаут, Весна Цветков, Милена Костовић, Драган Радуловић, Јовица Стојановић, Владимир Јовановић, Дејан Тодоровић, Нина Николић, Јелена Сенћански, Грозданка Богдановић, Драгана Мариловић (2024)
    Prizma, REASONING, Rudnik, jalovina, Fond za nauku Republike Srbije

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • 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
    ... exponents The amount of leakage, or fluid loss through the clearance, is regulated by the size of the clearance and the length ofthe piston. The standard piston length is approximately 1 meter per 1000 meters of fluid lift, starting from a minimum length of about 0.6 meters. For depths greater than ...
    ... describe the motion of sucker rods and the forces carried by the rods. The original work was for conventional geometry pumping units, but the standard has now been expanded to include air-balanced geometries.This method to be completed by hand using the equations, charts, and table [15]. 32 ...
    ... to the data entry window you were using before, with all previously entered data already in place. RodStar features comprehensive data for all standard pumps, rod sizes, rod grades, pumping units, tubing sizes, and more. It is equipped to recognize when you need slim hole couplings or a thin-walled ...

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... During 2007 the Ministry supported 28 projects within various institutions aimed at gathering the necessary geological data. GeolISS is now a standard tool for han- dling spatial data in all projects funded by the Ministry. Bearing in mind the vast amount of textual data in Ge- olISS (observations ...
    ... data is envisaged that will improve search results in various GIS databases. Besides the conversions already implemented, conversion to other standard formats, such as MULTEXT-east, DCR (Data Category Registry) or MAF (Morphological Annota- tion Framework) are also anticipated. The impl ...

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... samples over silica gel over night and heating during 2 hours at 100%C. For infrared spectroscopy, the samples were prepared in the form of standard potassium bromide (KBr) pallet (the ratio between pepsin and KBr and pepsin – AP? and KBr were 1:100); the pallets of haemoglobin samples in KBr ...
    ... l analysis Graphs were plotted by using Microcal Origin program (version 6.1). Values including Ks, Vnas= Kos» KnA» KAa, and Aaso and their standard errors are presented as means + SEM (obtained by the linear regression analysis). The statistical comparisons were performed by Students t-test ...

  • Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone

    Aleksandar Luković (2021)
    Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...
    magnetit, hematit, hemoilmenit, Borska metalogenetska zona, porfirska ležišta
    ... dobijeni na SEM-EDS sistemu. Redukcija podataka kao i odstupanje od standarda (drift correction) obavljeno je upotrebom SILLS programa zasnovanom na MatLab-u (Guillong et al., 2008). Tokom snimanja standard BCR-2G (Basal glass standard) analiziran je nekoliko puta. Vrednosti koncetracija mikroelemenata ...
    ... korišćen je EDS sistem uz upotrebu unutrašnjih standarda i napona od 20 kV, dok je za pojedine precizne analize magnetita i hemoilmenita korišćen WDS, sa uslovima snimanja – napon 25 kV i jačina struje 16 nA. Pritom su korišćeni sledeći spoljašnji standardi i analitičke linije: Fe (Fe Kα), TiO2 (Ti Kα) ...
    ... 2014; Oeser et al., 2014). Širina laserskog snopa iznosila je 60 µm za standarde, dok je za uzorke upotrebljavana promenjiva širina od 20–40 µm u zavisnosti od potrebe. Repetitivna frekvencija lasera iznosila je 20 Hz za standarde i 30–60 Hz sa uzorke u zavisnosti od širine laserskog snopa. Uzorak koji ...

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje
    ... implementation of the standard ISO 31000:2009, would allow the establishment of internationally acceptable principles, which are also based on quality management guidelines (PDCA (Plan, Do, Check, Act)) [31]. Application of risk management procedures based on the implementation of the standard ISO 31000 for ...
    ... tion of the standard ISO 31000:2009, would allow the establishment of internationally acceptable principles, which are also based on quality management guidelines (PDCA (Plan, Do, Check, Act)) [31]. Application of risk management procedures based on the implementation of the standard ISO 31000 for ...

  • Analiza parametara bušenja i miniranja na površinskom kopu „Čokoće“ - Novi Popovacu softverskom paketu O-Pitblast

    Aleksandar Đorđević (2024)
    Bušenje i miniranje predstavlja prvu fazu u otkopavanju čvrstih mineralnih sirovina, kako u podzemnoj tako i u površinskoj eksploataciji.Bušenjem i miniranjem vrši se njihovo odvajanje iz masiva i drobljenje na komade neophodne krupnoće.Uprkos razvijenoj mehanizaciji, praktično jedini efikasni postupak otkopavanja čvrstih stenskih masiva zasnovan je na primeni eksploziva.Ležište krečnjaka “Čokoće” kao i cementara “Moravacem” nalaze se u Popovcu kod Paraćina u centralnom delu Srbije. Preduzeće datira još iz davne 1928.godine, koje je tada, u improvizovanim pećima, peklo i proizvodilo kreč.Od 2015. ...
    PK „Čokoće“, moravacem, krečnjak, eksploatacija, miniranje, bušenje, O-pitblast
    ... potresa u okolini kopa treba štititi stambene, industrijske i druge građevinske objekte. Prema postojećim ruskim, nemačkim ı američkim standardima (Srbija još nema standard takve vrste), minimalna brzina oscilovanja tla, koju mogu podeti građevinski objekti bilo kakve konstrukcije i stanja, iznosi 5 mm/s ...
    ... sirovine utvrđenog kvaliteta Je vršena na osnovu toga u kojoj meri i kojim svojstvima kvaliteta sirovina zadovoljava (ili ne zadovoljava) propisane standarde ili neke interne zahteve pojedinih prerađivača. Određivanje kvaliteta karbonatne sirovine, sa aspekta njenog korišćenja kao tehničkog građevinskog ...
    ... se mogu predvideti ı tako izbeći moguće štete na objektima usled miniranja. Detaljna analiza se prikazuje kroz dijagrame prema odgovarajućim standardima kao i određivanjem zona na snimcima sa terena. 60 Osnovni moduli za rad podeljeni su u celine i prate logičan sled operacija: Design Module ...

  • Povezivanje i detaljno snimanje donjeg potkopa rudnika ,,Crveni Breg“ na Avali

    Jovan Obradović (2024)
    Cilj ovog Završnog rada na temu „Povezivanje i detaljno snimanje donjeg potkopa rudnika ,,Crveni Breg“ na Avali” jeste dobijanje koordinata tačaka jamskog poligonskog vlaka, kao i prikaz samog rudnika na osnovu detaljnog snimanja jame, kao poprečnih profila podzemne rudničke prostorije. U datom radu biće predstavljene metode koje su primenjene prilikom snimanja, kao i rezultati samih merenja i sva potrebna računanja da bi se došlo do potrebnih koordinata.Merenja za završni rad obavljena su tokom terenske nastave održane u junu 2024. godine ...
    Rudarska merenja, povezivanje, plan jame, poprečni profil
    ... stena“, na izvorišnom delu potoka Prečica, nedaleko od današnjeg odmarališta ”Šuplja Stena”. Do nedavno, njegovu lokaciju označavao je rudarski toranj, koga više nema. Rudnik je radio od 1968. do 1972. godine. Tada je bez jasnog razloga zatvoren, a topionica i postrojenja rastureni. Navedena dva ...

  • Osnovi hidrogeologije

    Petar Dokmanović (2021)
    hidrogeologija, atmosferska voda, površinske vode, podzemne vode, vodni bilans, poroznost stena
    ... sastav, usvoji kao standard/referenca, na osnovu koga se sadržaj D i 18O, u prirodnim vodama, izražava u relativnim jedinicama. Pun naziv ovog standarda bio je (eng.) Standard Mean Ocean Water ili, skraćeno, SMOW [5]. Od 1967. godine, na osnovu novijih statističkih podataka, ovaj standard je „rekalibrisan“ ...
    ... sociologija - u kontekstu globalno izraženog trenda deficita pijaćih voda, koje predstavljaju jedan od suštinskih socio-ekonomskih parametara životnog standarda ljudi - ekonomija - u kontekstu realnog/tržišnog vrednovanja resursa PV za različite namene - IT – iz kojih proističu „alati“ za potrebe: sortiranja ...
    ... sedimentacije (hidrometrisanja). Metoda prosejavanja se primenjuje kod krupnozrnijih stena, prečnika zrna većih od 0.06 mm ili 0.1mm, zavisno od standarda laboratorija. Za prosejavanje se upotrebljavaju sita sa otvorima standardizovanih veličina, koja su poređana tako da, najviša mesta zauzimaju sita ...

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Испитивање магнетске сусцептибилности прашине антропогеног порекла

    Дубравка Новичић, Весна Цветков, Весна Дамњановић (2019)
    ... i vrste raka povezanog sa hormonima kao što su rak prostate i rak dojke. Tokom poslednjih decenija primenjene su brojne mere i uvedeni su standardi kvaliteta vazduha u zakonodavstvu Evropske unije sa ciljem smanjenja koncentracije čestica u vazduhu i njihovog uticaja na ljudsko zdravlje i životnu ...

  • Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation

    Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer (2021)
    kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje
    ... random walk noise in integrated Lagrangian displacements (Stanier et al. 2016). The standard deviation of the integrated displacement error grows by σu = √ nσui , with n the number of epochs and σui the standard deviation of the incremental displacement error. PIV displacement errors are larger for ...
    ... zero. Similarly, the finite stretch is again semi-normally distributed, where its standard deviation increases in time by approximately √ n. In this region we find that the incremental strain has σǫi ≈ 6 × 10−3, the standard deviation of the finite stretch error increases to σ V ≈ 5 × 10−2 at the end ...
    ... cumulative, finite deformation, various strain tensors have been developed, and we discuss what strain measure best describes large shape changes, as standard infinitesimal strain tensors no longer apply for large deformation. PIV or comparable techniques have become a common method to determine strain ...

  • A WebGIS Decision Support System for Management of Abandoned Mines

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)
    ... (OGC) is the main international and industrial organization for standardization in the field of geospatial data. Web Map Service (WMS) is an OGC standard and at the same time the most popular and most widely used OGC Web service which specifies the communication between unrelated programs when sending ...
    ... client can send a request to view a map from a server. This cartographic web service produces maps of georeferenced data by drawing them in the standard format for images (PNG, GIF, JPEG...) and publishes them via the Web [26]. Web Feature Service (WFS) enables communication at the level of the class ...

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection