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Упит dcterms_creator_txt:Sachsenhofer Reinhard F.

659 items

  • Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova

    Zoran M. Štirbanović (2015-07-01)
    Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...
    rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina
    ... (označimo jednu od njih sa f). Alternativa a je bolja od b prema kriterijumu f ako je f (a ) > f (b ) . Funkcija preferencije se definiše na sledeći način:    >− ≤ = )()(јеако)),()(( )()(јеако,0 ),( bfafbfafP bfaf baP Radi kraćeg pisanja uvodi se oznaka d, d = f(a) - f(b). . Autori metode ...
    ... relacije, (fi k=f i(ak)) ajBiak ajbiak ajIiak akbiaj akBiaj fij - Pi fij - pi fij fij + pi fij + Pi P i i p i su „preferentni pragovi"; I i označava indiferentnost. Relacija ajBiak važi ako je f i (a j ) > f i (a k ) + P i , a a j b i a k ako je f i (a j ) > f i (a k )+p i ...
    ... G. H. Harris, R. R. Klimpel, F. F. Aplan, Evaluation of Flotation Collectors for Copper Sulfides and Pyrite, I. Common Sulfhydryl Collectors, International Journal of Mineral Processing, 21, 1987, pp. 105-127. 94. P. K. Ackerman, G. H. Harris, R. R. Klimpel, F. F. Aplan, Evaluation of Flotation ...

  • 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
    ... th e d ir ec ti o n o f p re se n t E ar th m ag n et ic fi el d o n th e sa m p li n g ar ea . M ag n et ic re ad in g s fo r th e fi el d o ri en ta ti o n o f th e co re s w er e co rr ec te d u si n g IG R F -1 2 In te rn at io n al G eo m ag n et ic R ef er en ce F ie ld m o d el (T h éb ...
    ... m m ar y o f lo ca li ty m ea n p al eo m ag n et ic d ir ec ti o n s b as ed o n th e re su lt s o f p ri n ci p al co m p o n en t an al y si s (K ir sc h v in k 1 9 8 0 ). K ey : L at . N an d L o n . E : g eo g ra p h ic co o rd in at es (W G S 8 4 ), n /n o : n u m b er o f u se d /c o ...
    ... 8 4 .5 2 1 9 .7 2 3 2 .6 7 8 4 .5 3 4 0 /1 6 S a n to n ia n 4 V ra će v šn ic a 4 3 1 4 – 3 2 5 4 4 � 0 4 0 2 2 00 2 0 � 3 4 0 5 0 00 F ly sc h g re y 6 /1 2 2 1 8 .9 2 4 0 .3 3 2 8 3 .7 2 3 7 .7 2 1 5 .5 3 2 8 3 .7 9 4 /5 0 9 9 /4 1 U p p e r C e n o m a n ia n -T u ro n ia ...

  • 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
    ... izmerena vrednost veznog ugla f, i prelomnog ugla f. Direkcioni ugao vŽ poligonske strane 1-2 dobija se kada se od zbira uglova vi + f, oduzme 180". vi =V ! + B, —180? Direkcioni ugao vž poligonske strane 2-3 dobija se kada se na zbir uglova vŽ + 8, doda 180%. v= + f, +180? Dva prikazana slučaja ...
    ... Uglovi kod viskova f, qi, f, Q sračunaju se zavisno od oblika trougla, po sinusnim ili tangensnim Jednačinama. Iz analize tačnosti, vidi se, da za trougao izduženog oblika, u kome je a < 35", B > 1459 treba koristiti sinusne Jednačine: sin a = % siny; . b_. sin f = Z sin?. a za trougao ...
    ... uglova poligonskih strana mogu se uopštiti. Direkcioni ugao vi naredne strane dobija se kada se zbiru direkcionog ugla Vji_i prethodne strane i ugla f'; koji povezuje te dve strane, doda ili oduzme 180%. o V =V,_ı + 0, +180 Dalje sledi: ako je (v; + P;) > 180% onda se oduzima 180", a ako je je (v; ...

  • 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

  • Petrographic study of Beočin zeolite tuff

    Simić Vladimir, Andrić Nevena, Cvetković Vladica, Vuković Nikola, Živanović Jelena (2013)

  • 3-D Basin Modeling of the Serbian Banat Region of the Pannonian Basin: Evaluating the Impact of Tectonic Inversion upon Hydrocarbon Potential

    Yilmaz Hulia, Pigott John, Radivojević Dejan, Pigott Kulwadee, Milovanović Ivana (2011)

  • Oxygen vacancy-induced microstructural changes of annealed CeO 2-x nanocrystals

    Askrabiac Sonja, Dohceviac-Mitrović Zorana, Kremenović Aleksandar, Lazarević Nenad, Kahlenberg Volker, Popović Zoran V. (2012)

  • Mesoporous CeO 2 nanopowders with different particle sizes

    Dohcevic-Mitrović Zorana, Golubović Aleksandar, Radović Marko, Fruth Viktor, Kremenović Aleksandar, Meden Anton, Babić Biljana, Šćepanović Maja, Popović Zoran V. (2011)

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)

  • Технологија израде истражних подземних просторија бушачко-минерским радовима

    Жарко Милошев (2024)
    Овај рад обрађује технологију израде истражних подземних просторија у "нн" лежишту, са посебним освртом на бушачко-минерске радове.Циљ израде истражних нископа био је прикупљање детаљних геолошких, геотехничких и хидрогеолошких података о стенском масиву и минерализованим комплексима.Рад је подељен на теоријски и практични део, где је у теоријском делу дат преглед метода израде подземних просторија, класификација истих и приказ примене бушачко-минерских техника у условима различитих рударско-геолошких карактеристика.У специјалном делу рада обрађена је технологија израде два истражна нископа, транспортног и сервисног, који ...
    истражне подземне просторије, бушачко-минерски радови, рударско-геолошке карактеристике, транспортни нископ, сервисни нископ
    ... HNOTDpOHIM42 CKCIHJIO3HBa 34 KOHTyDHC MHHC HO IHIpOQ)ecopy IIOKpOBCKOM: q =0.15 · /f(0.2-f + +) ey k, [kg/m"} (31) B - aKTHBHH OOHM JIHHHJEĆ KOHTyDpHHX H IHIpe/(KOHTypHHX OymroTHHa (Oe3 yuentha mupuaHe) (m) f - koeunujeHT uBpcrohe ek - Koed)yuuiijeHT pajiHe cnoOco0HocTH eKcIrnonHBa (ck = 525/Ax) ...
    ... Cnenun(buuHa norportima eKcImmo3uBa o ripo(becopy IIOKDOBCKOM: q=dq" fo:v · e· m,[kg/m"] () rne jJe: qi – Koec(bHiHjeHT OTHIOpHocTH cTeHe (qi = 0,1 x f), f - koeunujeHT uBpcrohe fo - koepunujeHT crpykType creHe (3a MacHBHe KprTe 1,1) V – Koc(buniHijeHT CTeIIIFbeHOCTH MHHC (3a JeJiHy CJIOOO/IHy IHOBPII ...
    ... Cnenun(biuHa norportima cKcImmo3uHBa T0 ripo(becopy IIOKpOBCKOM: q=q" fo:v · e· m,[kg/m"] (30) ql - koeunujenr ormopHocTu creHe (ql1 = 0,1 x f), f - koeunujeHT uBpcrohe fo - koeounujeHT crTpykType crTeHe (3a MacHBHe Kpre 1,1) V – Koc(buniHijeHT CTeIIIFbeHOCTH MHHC (3a JeJiHy CJIOOO/IHy IHOBPII ...

  • Surface modification of sol-gel synthesized TiO2 nanoparticles induced by La-doping

    Grujić-Brojcin Mira, Armaković Stevan, Tomić N., Abramović Biljana, Golubović Aleksandar, Stojadinović Bojan, Kremenović Aleksandar, Babić Biljana, Dohcević-Mitrović Zorana, Šćepanović Maja (2014)

  • New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"

    Saša Ivanišević, Dejan Radivojević (2018)
    геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија
    ... података  у  оквиру  горњомиоценских  формација  на  простору  структуре  Кикинда‐Мокрин.  Упоредни  приказ  индустријске корелације лежишта A, D, E, F и G и нове корелације у оквиру турбидита дна басена Мајдан формације.  Хроностратиграфске  границе  дате  су  према  традиционалној  индустријској  и ...
    ... correlation within Upper  Miocene formations in the area of the “Kikinda‐Mokrin” high. Parallel presentation of the industrial correlation of A, D, E, F and  G  reservoirs  and  the  new  correlation  within  the  basin‐bottom  turbidites  of  the  Majdan  Formation.  Chronostratigraphic  boundaries  are  ...
    ... депозиционе  средине.  На  слици  1б  приказан  је  приступ  који  је  коришћен  у  „индустријском“  препознавању,  издвајању и  корелацији  лежишта A, D, E, F  и G  као  појединачних слојева пешчара на пољу „Мокрин“. Недоследност у избору маркера, издвајању и  корелацији лежишта угљоводоника довела је до по ...

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... both in depth and from · · O waste- location to location, so the method of taking and O selection of representative samples is problematic and y &@F"c'“f'“ a has not yet been standardized (Rakić et al., 2011). The ” Šoil
    ... j air(a) f water (v) Fig. 3. Phase system change of municipal waste during, iodegradation (Gourc and Staub, 2010). Values of basic physical parameters in a certain stage of biodegradation are determined according to the following expressions: |. O ı_M H[l Ah (1—"0)F n=m An—n„—To ...
    ... ? OB Bt! ' Šl LJ ' ı ' J INJ . ' ' :l s| |} RR r . , ' ' i R- ~ ~ ' = - HE E ı | Bi — ljl ' i = NH ı | Ri = [00 š ' ' NIJ e= | ·. ' ' F ŠO I - 12 a r -00| —— T }11 ——— 0 10 20 30 40 50 60 70 water content w (%) Fig. 5. Water content change in relation to the depth of taken sample ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

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

  • Frequency and Length of Syllables in Serbian

    Marija Radojičić, Biljana Lazić, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Ján Mačutek, Lívia Leššová (2019)
    Basic analyses of several properties of syllables (the rank-frequency distribution, the distribution of length, and the relation between length and frequency) in Serbian is presented. The syllabification algorithm used combines the maximum onset principle and the sonority hierarchy. Results indicate that syllables behave similarly to words as far as mathematical models are concerned, but values of parameters in models for syllables are quite different from those for words.
    frekvencije slogova, dužina slogova, srpski jezik
    ... e(е), i(и), o(о), u(у) consonants sonorants j(ј), l(л), lj(љ), m(м), n(н), nj(њ), r(р), v(в) obstruents b(б), c(ц), č(ч), ć(ћ), d(д), dž(џ), đ(ђ), f(ф), g(г), h(х), k(к), p(п), s(с), š(ш), t(т), z(з), ž(ж) Two further aspects of Serbian must be taken into consideration. First, the consonant r ...
    ... least for Slavic languages, much more restricted that the one of words. The trend of the empirical repeat rate (RR = (i, f,7)/N2, with K being the inventory size, N the sample size, and f;, i= 1,...,K the frequencies) to decrease with the increasing inventory size is presented e.g. by Kelih (2013) for graphemes; ...
    ... articulation, phonemes are classified as plosives (their graphemic representations are b, p, d, t, g, k), affricates (c, č, ć, dž, đ), fricatives (f, z, s, ž, š, h), nasals (m, n, nj), laterals (l, lj), a vibrant (r) and semivowels (v, j). The Serbian language uses two alphabets: Latin and Cyrillic ...

  • 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
    ... Chemical compositions (wt.%) of the samples investigated, obtained by SEM-EDS analysis. Elements PG1 PG2 PGIR PG1P o 47.07 46.99 51.65 46.69 F BDL BDL 0.56 BDL Na BDL BDL 0.08 BDL Mg BDL BDL 0.03 BDL Al 0.26 0.25 0.77 0.30 Si 2.23 2.25 41.19 0.06 P 0.34 0.31 0.65 0.14 s 21.77 21.67 1.15 ...
    ... dihy- drate is the principal phase present in raw phosphogypsum sam- ples, which is formed according to the chemical reaction in Eq. (6): Cayjo(POx);F+ + 10H>SOa + 20H,O — 10CaSOu · 2H,O + 6H5PO, + 2HF (6) Quartz is the predominant Si-bearing phase, originating from the parent phosphate rock, as ...
    ... Brushite formed similarly to gypsum, which is not surprising as these are isostructural mineral phases (see Eq. (7)) (Mikheev, 1957): Cayo(POa),F> + 9H>SOa + 20H2 O — CaHPO, · 2H,O + 9CaSO, · 2H2,O + 5H,PO, + 2HF (7) During acid digestion of aluminosilicate minerals, AP* ions are first released ...

  • The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA

    Vera M. Divac, Aleksandar Mijatović, Marina D. Kostić, Jovana Bogojeski (2017)
    Serija organoselenijum trans-paladijum(II) kompleksa 1 (bis(2-(fenilselanilmetil)oksolan)dihloropaladijum(II)), 2 (bis(2-(fenilselanilmetil)oksan)dihloropaladijum(II)) i 3 (bis(2) ,2-dimetil-3-(fenilselanil)oksan)dihloropaladijum(II)) su korišćeni za ispitivanje reaktivnosti ovog specifičnog tipa kompleksa prema različitim bio-molekulima. Ovaj sistem je od posebnog interesa jer se jako malo zna o supstitucionim reakcijam organoselenijum paladijum(II) kompleksa sa trans konfiguracijom. Zamena koordinovanog hlorida sa serijom malih bio-molekula (l-Met, l-His, l-Cis, GSH i 5′-GMP) proučavana je pod uslovima pseudo-prvog reda kao funkcija koncentracije nukleofila i temperature korišćenjem tehnika zaustavljenog toka. Rezultati za proučavane komplekse ukazuju da ...
    Pd(II), Selen, Substitucija, Kinetika, Mehanizam

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... Classification of fly ash to ASTM C 618 [17] Characteristics Class Natural pozzolan F C N SiO2+Al2O3+Fe2O3 min (%) 70 50 70 SO3 max (%) 5 5 4 Humidity max (%) 3 3 3 Loss on ignition max (%) 6 6 10 Class F of fly ash is silicate, or silicate and aluminat material whose selfhardening effect ...
    ... Based on certain oxide content, fly ash can be divided into: Table 3 Classification of fly ash to ASTM C-618 [17] Class Ash Chemical composition F Sour Very low in Ca, slather Fe, (SiO2+Al2O3+Fe2O3) > 70 (%) C Alkaline High content CaO (SiO2+Al2O3+Fe2O3) > 70 (%) The main flaw of ASTM ...
    ... ash in accordance with ASTM C-618 amended classification according to McCarthy (1990) [17] Class Ash Chemical composition McCarthy – CaO / % F Sour Very low in Ca, slather Fe, (SiO2+Al2O3+Fe2O3)>70(%) <10 10 ÷ 20 C Alkaline High content CaO (SiO2+Al2O3+Fe2O3)>70(%) >20 2.3 Pozzolanic ...

  • 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
    ... adpression floras from central and northwestern Europe.– Zitteliana A, 54, 39–52. doi: 10.5282/ubm/epub.22322 HUBMANN, B., EBNER, F., FERRETTI, A., KIDO, E., KRAINER, K., NEUBAUER, F., SCHÖNLAUB, H.-P. & SUTTNER, T.J. (2014): The Paleozoic Era(them), 2nd edition.– In: PILLER, W.E. [ed.]: The lithostratigraphic ...
    ... inter- Figure 3. A sedimentological column of the Kostadinovica succession. Grain size is shown on the right-hand side of the column (si – siltstones, f – fine- grained sandstone, m – medium-grained sandstone, c – coarse-grained sand- stone). The sedimentary sequences or beds are designated by the letter ...
    ... tenerrimum ETTINGSHAUSEN. e) Accumulation of filiform detritus and a specimen similar to Rhodeopteridium leptofoliatum VAN AMEROM (marked by white arrows). (f ) Filiform Rhodea sp. type foliage. (g, h) Lepidodendron sp. G eo lo g ia C ro a ti ca Geologia Croatica 73/3138 Figure 10. Various aspects ...

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... Peteves, E., Tzimas, E., 2018. EU Coal Regions: Opportuni- ties and Challenges Ahead (JRC112593 EUR 29292 EN) Luxembourg. Bechtel, A., Widera, M., Sachsenhofer, R.F., Gratzer, R., Lücke, A., Woszczyk, M., 2007. Bio- marker and stable carbon isotope systematics of fossil wood from the second lusatian lignite ...
    ... A., Janssens-Maenhout, G., Jensen, K.M., Joos, F., Kleinen, T., Krummel, P.B., Langenfelds, R.L., Laruelle, G.G., Liu, L., MacHida, T., Maksyutov, S., McDonald, K.C., McNorton, J., Miller, P.A., Melton, J.R., Morino, I., Müller, J., Murguia- Flores, F., Naik, V., Niwa, Y., Noce, S., O’Doherty, S., Parker ...
    ... czna b, Weronika Goraj b, Izabela Śnieżyńska c, Aleksandra Krążała c, Artur Banach b, Ivica Ristović d, Mirosław Słowakiewicz c,e, Zofia Stępniewska f a Institute of Agrophysics, Polish Academy of Sciences, ul. Doświadczalna 4, 20-290 Lublin, Poland b Institute of Biological Sciences, The John Paul ...