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Упит dcterms_creator_txt:Gómez Borrego A.

1483 items

  • 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

  • Fragmentation Size Prediction of Blasted Material Using a Specialized Software for Drilling and Blasting

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić, Miljan Gomilanović (2024)
    Design and optimizing the drilling and blasting parameters, should fill the requirements for the capacity, fragmentation size, and technical characteristics of loading and transport equipment, and enable a safe work at the open pit. Besides mentioned, it also achieves the minimal impact on the environment of the open pit and decreases the negative effects on the environment, especially in the blast vibration and flyrock. To obtain the best possible blasting effects and consider all the factors, a specialized software is ...
    optimization, O-Pitblast, drilling, blasting, fragmentation size

  • Effectiveness Analysis of Different Bucket-wheel Excavators

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić (2021)
    Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...
    bucket-wheel excavator, open-pit coal mine, mining, multi-criteria decision methods

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... natural radioactive series for a period of 4 weeks. The activity concentra- tion of radionuclides was determined using a high-purity germa- nium radiation detector of 50% relative efficiency. The detector was calibrated using a secondary reference material with a char- coal matrix in the same 120 ...
    ... Accepted Manuscript online: 28 April 2020; Associate Editor: Asuman Turkmenoglu) Phosphogypsum is a waste product of the phosphoric acid manu- facturing process. It is produced in the form of a fine powder with a large calcium sulfate content. This process produces ~5 tons of phosphogypsum for every ton ...
    ... higher activity concentration of 2%U, was further subjected to the recrystallization process (Fig. 2). A total of 10 g of the sample was mixed with 2 L of distilled water in a beaker. Using a magnetic stirrer, the mixture was stirred for 2 h at ~45%C, allowed to settle for 2 h at the same tempera- ...

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... |_f|4 Hi LI | |}- -} -_-L}] E B I J EsH|I ||BLJ-| a -B EaE E s |M | LJ |E | J E || || || A / | | j ||> |M | || }A | | || -i I L J Lj - I - - -| | - { | LJ ||_|| |A|}_| |_{L_| |f= | L J i |Epi|s | s | | 5 / % Bie|||s|P|P{E|S| ...
    ... (specimen SA13.2/12). It has a heavily corroded, flatly deformed first quarter of the last whorl and part of the third quarter of the last whorl, with a more favourable preservation of a less corroded outer mould. The unfavourably pre- served opposite side shows a small segment of development ...
    ... transitions rather abruptly into a narrow ventral side. The whorl at the base falls off with a not-very high, but clearly defined, oblique umbilical wall. The body chamber is separated from the phrag- mocone by a distinct constriction. The juvenile sculpture changes at a diameter of approximately 22 ...

  • Услови заштите изворишта подземних вода “Јарош“ за водоснабдевање Сомбора

    Ивана Јовановић (2024)
    Територија града Сомбор се налази у периферном северозападном делу Војводине, односно Србије, у близини границе са Хрватском. Сам град Сомбор се налази југозападном делу територије и представља гравитациони центар тог подручја. Повољан географски положај условио је афирмацију Сомбора као градског насеља, са јаком пољопривредом, индустријом, занатством и прометом. "ВОДОКАНАЛ" из Сомбора је јавно комунално предузеће чија је основна делатност захват сирове подземне воде, њен третман, и дистрибуција ка потрошачима Сомбора и приградских насеља и насељених места: Лугова, Жарковца, Чонопље, ...
    заштита, извориште, водоснабдевање, Јарош, Сомбор
    ... caJerakoen--OMŠ 9. H3BOPH IIOTEHTIHJA.THHX 3AT AĐEĐĐA H OIIEHA CTAĐA HOCTOJE TE POLITEKICA a a as a aA a a V OE OO O A 58 10. IIPE,T.TOT MEPA 3A YCIIOCTAB.bAĐĐE KOHTHHYA.IHOF MOHHTOPHHT A BO,TA Y 3OHAMA CAHHTAPHE 3AITIHTHTE _ 58 ı8B OJE 74 2 · 2225 - - OOAIAAIAJAIRAAARIAAAIJAARAAIINAAIIAAAGAAAA ...
    ... R KI _ i : _ – – p - P M Kl – a DD ~ [. g a ~ ~ ~ [ [. |. [. [ b b , h h h h h , h h h , h a ~ – m af ~+ [1z] :Pa] ~ [53] | y} e — a – – o [-] o o o o o [-] [>] – – _ , ' rl Y Y Y y rl r r Q , , i 5= – | – —~ e o |o} [ ) —~ yy l o o r [7 —| m m [2 a ~ a [ ra [ a Datum Cnuka 26. IIpuxas zpevaxe ...
    ... HeHmleMOpy H JaHyapy, a HajMažba TOKOM JIeTa Y MeCeTIyH JyJy, CTMKA 5. - O : 0 - - - B a a a g o c T Ba ya yx a (% ) -M R- U- ) – -- 0 || 2 3 d bj 6 7 8 9 IO IL 1 Cnuka 5. JTujazpau cpe0me Meceunux suuezo0utuhbux apeoOnocmu snažcHocmu 6a30VXG pezucmposaHux a YXMC Cow6op, y nepuooy ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... After entering a string of characters (word or part of a word), the user is offered a list of dictionary entries where the given string of characters appears, and by choosing from the list, the user can get a detailed view of the entry. Concluding remarks In this paper, we tried to give a brief presentation ...
    ... resources combined the elements of a geo-portal with classical web applications, presenting the information from diverse sources in a unified way. This paper presents technologies and tools used to develop the portal available at http://geoliss.ekoplan.gov.rs. A geo-portal is a type of web portal used to find ...
    ... development and implementa- tion of GeolISS is managed by a team from the Faculty of Mining and Geology at the University of Belgrade (FMG). Following the development of a geodatabase in ArcSDE and an ArcMap extension for data manage- ment, a web component was added to GeolISS. This web component is ...

  • Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking

    Ranka Stanković, Milica Ikonić Nešić, Olja Perisic, Mihailo Škorić, Olivera Kitanović (2024)
    U radu se prikazuju rezultati istraživanja vezanih za pripremu paralelnih korpusa, fokusirajući se na transformaciju u RDF grafove koristeći NLP Interchange Format (NIF) za lingvističku anotaciju. Pružamo pregled paralelnog korpusa koji je korišćen u ovom studijskom slučaju, kao i proces označavanja delova govora, lematizacije i prepoznavanja imenovanih entiteta (NER). Zatim opisujemo povezivanje imenovanih entiteta (NEL), konverziju podataka u RDF, i uključivanje NIF anotacija. Proizvedene NIF datoteke su evaluirane kroz istraživanje triplestore-a korišćenjem SPARQL upita. Na kraju, razmatra se povezivanje Linked ...
    paralelni korpusi, povezivanje imenovanih entiteta, prepoznavanje imenovanih entiteta, NER, NEL, povezani podaci, NIF, Vikipodaci

  • Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања

    Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић (2023)
    геохемија, угаљ, продукти сагоревања, XRF, ICP-MS

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... sufficient quantities [11]. Energy security is a parameter whose specificity lies in the influence of many factors, so it is not possible to define a unique methodology to determine [12]. Defining a methodological approach for determining the energy security of a country is possible only if the geopolitical ...
    ... It is also called a pessimistic composition due to the procedure by which it is performed—the presentation of a synthetic grade using a representative partial grade, which is defined as the best possible among the worst expected individual grades [48,49]; • Min–max composition is a fuzzy composition ...
    ... economy of a scenario. It is directly linked to national structures (institutions and human resources) [36], as well as the legal framework that follows relevant issues. The security of supply is a synthesis indicator that can be viewed in a very broad context. It is generally defined using a set of s ...

  • Стање квалитета амбијенталног ваздуха на подручју града Панчева

    Александар Маринковић (2024)
    Квалитет ваздуха је кључни фактор за здравље људи и очување животне средине. У овом завршном раду анализирано је стање амбијенталног ваздуха на територији града Панчева како би се сагледали извори загађења, ПЛН мониторинга и изазови у погледу квалитета ваздуха са којима се суочавају сви становници. Кроз примену савремених метода праћења, идентификовани су главни извори загађења и анализирана је дистрибуција загађујућих материја у урбаном окружењу.Праћењем концентрације загађивача као што су честице PM10, PM2.5, сумпор-диоксид (SO2), азот-диоксид (NO2) и други, ...
    мониторинг, загађивачи, здравље, Панчево, квалитет ваздуха
    ... |Ilapa/{ymaga (a),(Mc) SO», BTX, NO:, NO, NOx Ox, CoO 2. BarporacHu IOM (a),(Mc) SO:», BT, NO:, NO, NOx, NHs, H-2S, TNMHC, PMno, PM 5, PMuo 3. | BojnopBmma (a),(Mc) SO», BTX, TRS, PMio 4. Crapuepo (a),(Mc) SO:, BTX, NO:, NO, NOx, Ox, CO, NHxa, PMio 5. HapoynHa Bamra (a),(Mc) BTX, NOx, ...
    ... health of Pančevo”s citizens, thereby contributing to creating a safer and healthier environment for all. Keywords: monitoring, pollutants, health, Pancevo, air quality. Canp:aj: 5. OTEHLIVJA7IH/A 3ATAb/MBAU/A y TTAHUEBY ......aaaaaaaaa a aaananaaaeakaeanakaktkek 11 5.1 HajaHauajHMjM 43BOpM eMWMcCHje ...
    ... Mepekba KBa;1MTeTa Ba3/nyXa a 28 7.6 Tilpwcycrgo aaraf)yjyhwWx MarTepuja......................aaaaaaa a a eeataaeaeeeeetattatatekeet 28 8. AHA713A /4 TVMAUEMSE PE3y/TTATA ıy daaaaaaaaaaaaaaaaaaaaaaaataaaaNagauatia 30 8.1 Pe3aynrTaTrM MepeHMoa PMuo uecTMua...........aaa a aaaeaataeieeieeaaataiatte ...

  • 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)
    ... W. Duncan, G. Matanovic and A. Cerpa-Poljak, Rapid Commun. Mass Spectrom., 1993, 7, 1090–1094. 43 D. C. Muddiman, A. I. Gusev, A. Proctor, D. M. Hercules, R. Venkataraman and W. Diven, Anal. Chem., 1994, 66, 2362–2368. 44 D. C. Muddiman, A. I. Gusev, K. Stoppeklangner, A. Proctor, D. M. Hercules, P ...
    ... formation of arachidonic acid and derived biomediators, this enzyme displays a critical role in cellular homeostasis due to catalysis of a rate- limiting step. Accordingly, it has been shown that pancreatic PLA2 plays a role in carcinogenesis, immune suppression, stimulation of cell proliferation ...
    ... shown that human pancreatic PLA2 stimulates the growth of a human pancreatic cancer cell line via binding to a specific receptor.9,14 It also stimulates extracellular matrix invasion by normal and cancer cells.15 In addition, this enzyme is a target protein for triggered liposomal drug delivery to ...

  • Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia

    Dragoljub Bajić, Dušan Polomčić (2014)
    A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...
    groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables
    ... modeling, in this case to define a groundwater control system for the “Bezdan 1” PS, is a common approach in modern hydrogeology. The hydrogeolog- ical setting was schematized, the input parameters defined and a model based on finite differences con- structed to develop a predictive hydrodynamic analy- ...
    ... which are a suitable verbal means of expressing the knowledge of each individual. Consequently, fuzzy logic is the codi- fication of common sense (GRAHAM 1991; LAI & HWANG 1996). Expert knowledge is used instead of differential equations to describe a system. The know- ledge is conveyed in a natural way ...
    ... knowledge in fuzzy logic is a linguistic variable, with its linguistic values that make up fuzzy sets. Combinations of variables and their values produce linguistic statements (expressions), which constitute a bridge between numerical representation of informa- tion on a computer and human thinking. ...

  • Arsenopirit iz rudnih ležišta Šumadijsko-kopaoničke oblasti: paregeneza, sastav i produkti oksidacije

    Ivana N. Jelić (2023)
    Arsenopirit, FeAsS je čest pratilac polimetaličnih orudnjenja Šumadijsko-kopaoničke oblasti. Jedan je od sulfida koji u najvećoj meri koncentriše zlato. Nepoželjan je u rudama jer njegovom oksidacijom na jalovištima može doći do oslobađanja arsena koji spada u elemente toksične za životnu sredinu. U okviru ovog doktorata sistematski su ispitivani arsenopiriti iz različitih stadijuma i tipova orudnjenja rudnih ležišta i mineralizacija Šumadijsko-kopaoničke oblasti (Rudnik, Sastavci, Trepča, Gokčanica – Drenjak i Rujak, Golijska reka i Jurija). Uzorci arsenopirita ispitivani su polarizacionom mikroskopijom ...
    arsenopirit, zlato, skorodit, Šumadijsko-kopaonička oblast, parageneza, zonarnost
    ... (KRPD); a, y = 90%. Na osnovu dobijenih XRPD rezultata, a prema jednačini (2.3), izračunat je at.% As. Sadržaj primesa u poslednjoj koloni se odnosi na prosečne sadržaje (u at.%) više (preko 15) SEM-EDS analiza za dati uzorak. i Primese Lokalitet As A A A o A - Uzorak a|[A] bIAJ c|[A] |5a02| ...
    ... markasita i arsenopirita (sl. 2.1). Pmnn markasit A.B,C t2 - bližnjenje P112,/n A,B,C k2 - antifazni domeni C112,d = BilŽ1 = PŽ,IC arsenopirt a =2A a = 2B a”'=A-B b'= 2B b=c b”=-c C=C CcC=2A c ' =A+B 1. podešavanje 2. podešavanje 3. podešavanje Slika 2.1. Odnos grupa-podgrupa između ...
    ... osnovu parametra dii Parametri Janežić et al. (2003) Ispitivani uzorci (Trepča) a|(A) 5.754(1) 5.748(1) bo(A) 5.654(2) 5.677(2) cCo(A) 5.776(2) 5.780(1) B.O) 111.95(2) 112.07(1) Vo(A*) 174.6(1) 174.82(8) dui(A) 1.6285(7) 1.63083(7) at.% As 31.7 32.271(1) Rudne mineralizacije u oblasti Gokčanice ...

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

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

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... FJ, VP-A at the site BN, G-A at the site SN, VP-A at the site O, and G-VP at the site Gc for Cu; G-WB, G-VP, and WB-VP at the site O for Zn; G-A at the site SN, VP-A at the site S, and VP-A at the site Gc for Pb; VP-A at the site FJ, WB-A at the site NS, and G-VP at the site S for As; WB-A at the ...
    ... spring frost. Figure 4. a) Mean air temperature ("C) and b) precipitation (mm) for the JJA period in 1971-2000. Complimentary Contributor Copy 204 Milena Jančić Tovjanin and Borivoj Pejić 1600 •+ 1400 + + + + • # • 1200 •+ • 1000 800 LI 600 A ıd A A A A A A · - H H [] 00 " B 400 ...
    ... The 12 Initial POPs (UNEP 2001) Chemical Annex Source Aldrin A P Chlordane A P DDT B P Dieldrin A IP Endrin A P Heptachlor A P Hexachlorobenzene (HCB) |0j P Mirex A P Toxaphene A P Polychlorinated biphenyls (PCB) A and C IP Polychlorinated dibenzo-p-dioxins (PCDD) c U Polychlorinated ...

  • Техничко решење површинског копа Галовићи код Косјерића од вода

    Јован Тодоровић (2024)
    Површинска експлоатација лежишта минералних сировина, поред експлоатације и прераде подразумева и успешно одводњавање површинског копа. Одводњавање једног површинског копа треба да буде добро одабрано, да објекати одводњавања својим капацитетима могу да обезбеде сакупљање и одвођење површинских вода и успешну заштиту од подземних вода. Циљ израде овог завршног рада је избор техничког решења заштите површинског копа Галовићи од површинских и подземних вода, како би се обезбедила сигурност рада, стабилност косина и ефикасност експлоатације.Добро изабрано техничко решење одводњавања омогућава смањење ризика ...
    Површински коп,, Галовићи,, површинске воде, подземне воде, објекти одводњавања
    ... M M 7 | — u ) ~ a 4 4 _— ~Q q N e. i 77 i NL , y —~ i x 200 \ KA> . — / } | \ 4 r i i a \\ e a ... 47 - - d ; - ı g / P e P i Qr BEO |a| \ DEPONIJA ZEMLJ} - N - . _ Ć 7 5 WNINIAAVT “ aa40459 o v O i ŠO V\ - = b W a ·. A ı — — _ X \ Ž AA L < a e – e e \ A - \QAŠ/& c — 100| “ ...
    ... — = = —— \ v -| — A i q ? p \ A š ·J č -- . \ _ . đ o u , - 7 es Z + u imes3 i || |j - \ · - Fž I NI 3 - m M Q8 \ [] \ \ \ ONs \ \ __ .. d | _ Z \ a l, a - ela? .~ — š < \ · eakasaa.b– oN ii š".-· { d ) 700 w \, ·–·H_ d |j a % \ ? / @_ \ \ # # ” č ; “ \ A e a u pujij!E, .y= 2= ...
    ... Leeva r A -) _ AA TyJ “ ” |- N m ~ MA – -. Pv - Dvl | \ i MI=\ | b ~ i pj J — – ' \ – \ ON ) e - . – _ VA \ | W |- ZOA A\M \ e „„FisKa =- — H \ a % p -. \ \ i a Ć \ee \ \ . J | \A \ “. 3 . —— & \ Ć “. MA > c _– 6od \\ - = - bo( — _ ii Pp \ -” — ~a COŠA — b » — _I i — 5 \ . es a i ...

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)