Претрага
895 items
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Development of integrated fuzzy model for mine management optimization
Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)... Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Development of integrated fuzzy model for mine management optimization | Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško ...
... Mining engineering DEVELOPMENI OF IN TEGRATED FUZZY MODEL FOR MINE MANAGEMENT OPTIMIZATION Miodrag Čelebić*, Sanja Bajić**, Dragoljub Bajić***", Dejan Stevanović**, Duško Torbica*, Vladimir Malbašić* Received on April 5, 2023 Presented by Ch. Roumenin, Member of BAS, on June 27, 2023 Abstract ...
... X: ]W;„]Wž, ... ,]W;il, + = 1,2,...,n, where all MŠ„» J = 1,2,...,m are triangular fuzzy numbers. Then, taking into account the membership function of the triangular fuzzy number, the fuzzy synthetic extent is calculated using; the following; equation: m i n m -1 m m m 1 1 1 S -Ž MLe|.2.MA, ...Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić. "Development of integrated fuzzy model for mine management optimization" in Comptes rendus de l'Académie Bulgare des Sciences (2023)
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Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
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Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential
The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти... on Geothermal Energy Potential Nataša Ćuković Ignjatović 1,* , Ana Vranješ 2,*, Dušan Ignjatović 1, Dejan Milenić 2 and Olivera Krunić 2 ���������� ������� Citation: Ćuković Ignjatović, N.; Vranješ, A.; Ignjatović, D.; Milenić, D.; Krunić, O. Sustainable Modularity Approach to Facilities ...
... Ignjatović, Dejan Milenić, Olivera Krunić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential | Nataša Čuković- Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, ...
... conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by / 4.0/). , Ana Vranje’ 7”*, Dugan Ignjatovié 1, Dejan Mileni¢ 7 and Olivera Kruni¢ ” University of Belgrade - Faculty of Architecture, 11000 Belgrade, Serbia; ignjatovic.dusan@arh.bg.ac.rs University of ...Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić. "Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential" in Applied Sciences-Basel, МDPI (2021). https://doi.org/10.3390/app11062691
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Минерагенија зеолитских туфова Србије
Vladan Kašić (2018-02-05)Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...... 392. Magyar I., Radivojević D., Sztanó O., Synak R., Ujszászi K., Pócsik M., (2013): Progradation of the paleo-Danube shelf margin across the Pannonian Basin during the Late Miocene and Early Pliocene. Global Planetary Change 103, 168–173. Margeta K., Zabukovec Logar N,, Šiljeg M. and Farkaš ...
... геотектонскијх јединица. Развој Панонског басена током неогена карактерише се вишефазним 114 тектонским покретима (Matenco and Radivojević, 2012; Pigott and Radivojević, 2010; ter Borgh et al., 2013) и брзом седиментацијом (Magyar et al., 2013; Sztanó et al., 2013; ter Borgh et al., 2015). У ...
... the relation ship between clinoptilolite and heulandite, Am. Mineral. 45, 341-350. http://dx.doi.org/10.5772/50738 158 Matenco, L. and Radivojević, D., (2012): On the formation and evolution of the Pannonian Basin: constraints derived from the structure of the junction area between the ...Vladan Kašić. "Минерагенија зеолитских туфова Србије" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-02-05)
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Efekti potencijalnog korišćenja postrojenja za preradu otpadnih voda kao energetskih izvora u sistemima daljinskog grejanja u Srbiji
Системи даљинског грејања постоје у 57 градова и општина у Србији и доминантно користе фосилна горива. У овим урбаним срединама су изграђени, или се планира градња система за пречишћавање отпадних вода. У раду је размотрена (са еколошког и енергетског аспекта) могућност додатног, енергетског коришћења топлоте пречишћене воде у СДГ, применом топлотних пумпи. На примеру Шапца је извршено поређење постојећег СДГ са системом који би применом топлотних пумпи искористио енергетски потенцијал система за пречишћавање отпадних вода. Добијени индикатори су послужили ...... Srbiji Dejan Ivezić, Marija Živković, Aleksandar Madžarević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Efekti potencijalnog korišćenja postrojenja za preradu otpadnih voda kao energetskih izvora u sistemima daljinskog grejanja u Srbiji | Dejan Ivezić, ...
... 2019 ЕФЕКТИ ПОТЕНЦИЈАЛНОГ КОРИШЋЕЊА ПОСТРОЈЕЊА ЗА ПРЕРАДУ ОТПАДНИХ ВОДА КАО ЕНЕРГЕТСКИХ ИЗВОРА У СИСТЕМИМА ДАЉИНСКОГ ГРЕЈАЊА У СРБИЈИ Дејан Ивезић, Марија Живковић, Александар Маџаревић Универзитет у Београду, Рударско-геолошки факултет, Београд, Србија dejan.ivezic@rgf.bg.ac.rs, marija ...
... отпадних вода су приказане на слици 4. 0 10 20 30 40 50 60 0 500 1000 1500 2000 2500 3000 3500 h e a t lo a d f o r D H g ri d i n M W hours per year 91 | Стручно научна конференција ТОПС 2019 Слика 4 Просечна месечна температура пречишћене воде и реке Саве [13] ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević . "Efekti potencijalnog korišćenja postrojenja za preradu otpadnih voda kao energetskih izvora u sistemima daljinskog grejanja u Srbiji" in Stručno-naučna konferencija TOPS 2019, Poslovno udruženje toplana Srbije (2019)
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Badenske školjke jugoistočnog oboda Panonskkog basena (Centralni Paratetis)
Gordana M. Jovanović (2014-12-05)Rad obuhvata detaljnu studiju badenskih školjaka koje potiču sa terenajugoistočnog oboda Panonskog basena (Centralni Paratetis). Proučavani su lokaliteti naprostorima Srbije (Fruška gora, Golubac, okolina Beograda, Aranđelovca, Koceljeva,Loznica) i severoistočne Bosne (Ugljevik). Pored taksonomske analize i paleontološkihopisa bivalvija, u radu je dat i spisak revidovanih vrsta koje su do sada pronađene usedimentima badenskog kata istraživanog terena. Do sada je ukupno poznato 41familija, 108 rodova i 174 taksona. Identifikovano je 170 bivalvijskih vrsta, međukojima su neke prvi put konstatovane na ovim ...školjke, baden, Panonski basen (Centralni Paratetis), stratigrafija,paleoekologija, paleogeografija, paleobiogeografija... (Čičulić, 1977; Čičulić i Veselinović, 1975; Petković i dr., 1976 i dr.). Svi prikupljeni podaci iz Vojvodine ukazuju prema Petković i dr. (1976), Radivojević i dr. (2010) da je morska transgresija zahvatila Frušku goru kada je bila kopnena sredina u Centralnom Paratetisu. Vreme početka badenske tr ...
... mekušaca, algi Lithothamnion i Lithophylum, ostrakodima i raznim bentoskim foraminiferima. Preko badenskih krečnjaka naležu sarmatski sedimenti (Radivojević i dr., 2010). Pored basenskog i basensko-lagunskog tipa nabušeni su i priobalni plitkovodni sprudni i mešoviti tip fracija. Sprudni tip je najčešće ...
... dr., 2004). Međutim, direktno prihvatanje ovih rezulatata je nesigurno, jer relativno mala epikontinentalna mora, kao što je Paratetis, prema Radivojević i dr., (2010) mogu biti pod snažnim uticajem regionalnih razlika u temperaturi. Slično mišljenje iznela je i Böhme (2003) koja smatra da je globalna ...Gordana M. Jovanović. "Badenske školjke jugoistočnog oboda Panonskkog basena (Centralni Paratetis)" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-12-05)
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Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom
U narednom periodu se planira izgradnja nekoliko desetina sistema za prečišćavanje otpadnih voda u većim gradovima u Srbiji. Iskustva iz postrojenja koja su trenutno u radu, pokazuju da bi prečišćena otpadna voda, s obzirom na protok i temperaturu, mogla da predstavlja značajan izvor obnovljive energije. U radu su prikazani primeri dobre prakse korišćenja ove energije u sistemima daljinskog grejanja u zemljama Evropske unije. Analiziran je rad postrojenja za prečišćavanje otpadnih voda u Šapcu i razmotrena je mogućnost njegovog korišćenja ...... izvorom Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom | Dejan Ivezić ...
... prečišćavanje otpadnih voda kao toplotnim izvorom Possibilities for Utilization of Waste Heat from Wastewater Treatment Plants by Heat Pumps Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović Univerzitet u Beogradu – Rudarsko-geološki fakultet Rezime - U narednom periodu ...
... eleborat, Rudarsko-geološki fakultet, Ugovor sa Ministarstvom zaštite životne sredine Republike Srbije, 401-00-1207/2018-05, 2018. AUTORI dr Dejan Ivezić - redovni profesor, Univerzitet u Beogradu - Rudarsko-geološki fakultet, dejan.ivezic@rgf.bg.ac.rs dr Marija Živković - redovni profesor ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović. "Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom" in Energija, Ekonomija, Ekologija, University Library in Kragujevac (2021). https://doi.org/10.46793/EEE21-1.11I
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Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... Assessment of Machinery Failures Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Fuzzy Model for Risk Assessment of Machinery Failures | Dejan V. Petrović, Miloš Tanasijević ...
... publications. - The Repository is available at: www.dr.rgf.bg.ac.rs symmetryS S Article Fuzzy Model for Risk Assessment of Machinery Failures Dejan V. Petrović 1,* , Miloš Tanasijević 2 , Saša Stojadinović 1, Jelena Ivaz 1 and Pavle Stojković 1 1 Technical Faculty in Bor, University of Belgrade ...
... 525; doi:10.3390/sym12040525 www.mdpi.com/journal/symmetry symmetry (mort, Article Fuzzy Model for Risk Assessment of Machinery Failures 1,* 2 Dejan V. Petrovié , SaSa Stojadinovié 1, Jelena Ivaz 1 and Pavle Stojkovi¢ ! , Milos Tanasijevi¢ 1 Technical Faculty in Bor, University of Belgrade, VJ ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
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Named Entity Recognition for Distant Reading in ELTeC
Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković (2020)Akcija COST „Udaljeno čitanje za evropsku književnu istoriju“, koja je počela 2017. godine, ima među svojim glavnim ciljevima stvaranje višejezične zbirke evropskih književnih tekstova (ELTeC) otvorenog koda. U ovom radu predstavljamo rad koji je obavljen na ručnom označavanju selekcije ELTeC kolekcije za imenovane entitete, kao i na proceni postojećih alata za prepoznavanje imenovanih entiteta u pogledu njihove sposobnosti da automatski urade takve anotacije. U poslednjem paragrafu se razmatraju zajedničke tačke između ove inicijative i CLARIN-a.... -s y n ta c t ic a n d d ire c t sp e e c h a n n o ta tio n . A t th is m o m e n t, W G 2 c a r r ie s o u t th e N E a n n o ta t io n fo r a s u b s e t o f la n g u a g e s : C z e c h (c z e ) , G e rm a n (d e u ), E n g lis h (e n g ) , F re n c h ( f ra ) , H u n g a r ...
... French: T h e m a n u a l c o rp u s c o n ta in s m a n y P E R S a n d fe w e r L O C a n n o ta t io n s . H o w e v e r , s p a C y - f ra a n n o ta te s to o m a n y L O C h e n c e th e lo w p re c is io n fo r th is ca te g o ry , a n d S E M -f ra a n n o ta te s to o ...
... u to m atic C o n te n t E x trac tio n ) E n g lish A n n o ta tio n G u id e lin e s fo r E n tit ie s , V ers io n 6 .6 . T ech- n ic a l rep o r t, L in g u is t ic D a ta C o n so r tiu m . h ttp s : //w w w .ld c .u p e n n .e d u /s ite s /w w w .ld c .u p e n n .e d u /f ile s /en ...Francesca Frontini, Carmen Brando, Joanna Byszuk, Ioana Galleron, Diana Santos, Ranka Stanković. "Named Entity Recognition for Distant Reading in ELTeC" in CLARIN Annual Conference 2020, Oct 2020, Virtual Event, France, CLARIN (2020)
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A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice
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 ...... w .w o rl d sc ie n ti fi c. co m b y U N IV E R S IT Y O F A L B E R T A o n 0 4 /2 6 /1 5 . F o r p er so n al u se o n ly . 374 N. Lilić, I. Obradović & R. Stanković 0 .0 1 7 2 N s /m2 8 0 .9 6 8 1 N s /m 2 8 0 .2 2 6 6 N s /m 2 8 6 .8 5 ...
... 361 M in . R es . E n g . 2 0 0 2 .1 1 :3 6 1 -3 8 2 . D o w n lo ad ed f ro m w w w .w o rl d sc ie n ti fi c. co m b y U N IV E R S IT Y O F A L B E R T A o n 0 4 /2 6 /1 5 . F o r p er so n al u se o n ly . 362 N. Lilić, I. Obradović & R. ...
... networks, and M in . R es . E n g . 2 0 0 2 .1 1 :3 6 1 -3 8 2 . D o w n lo ad ed f ro m w w w .w o rl d sc ie n ti fi c. co m b y U N IV E R S IT Y O F A L B E R T A o n 0 4 /2 6 /1 5 . F o r p er so n al u se o n ly . 364 N. Lilić, I. Obradović & R. ...Nikola Lilić, Ivan Obradović, Ranka Stanković. "A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice" in Mineral Resources Engineering 11 no. 4, Imperial College Press (2002): 361-382. https://doi.org/10.1142/S0950609802001014
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Еоценска фауна југозападног дела Сирт басена (Либија)
Љупко Рундић, Мери Ганић (2020)Љупко Рундић, Мери Ганић. "Еоценска фауна југозападног дела Сирт басена (Либија)" in Записници Српског геолошког друштва, Српско геолошко друштво (2020)
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Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia
Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović (2020)Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović. "Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia" in CATENA, Elsevier BV (2020). https://doi.org/10.1016/j.catena.2020.104914
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Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta
Vesna Cvetkov (2020)... tim tačnije definisanje potencijalnih zona od interesa za arheo- 15 A k t u e l n a i n t e rd i s c p l i n a r n a i s t ra ž i v a n j a t e h n o l o g i j e u a r h e o l o g i j i j u g o i s t o č n e E v ro p e loška istraživanja i lociranje arheoloških objekata. Sam izbor metode ...
... da se ponašaju kao mali magneti i orijentišu paralelno sa MPZ. 17 A k t u e l n a i n t e rd i s c p l i n a r n a i s t ra ž i v a n j a t e h n o l o g i j e u a r h e o l o g i j i j u g o i s t o č n e E v ro p e Drugi bitan i najčešće razma- tran parametar kod magnetometrijskih i ...
... arheoloških objekata od opeke pri različi- tim vrednostima inklinacije 19 A k t u e l n a i n t e rd i s c p l i n a r n a i s t ra ž i v a n j a t e h n o l o g i j e u a r h e o l o g i j i j u g o i s t o č n e E v ro p e pomeren u odnosu na centar uzročnika (Slika 1). Kako bi oblik magnetne ...Vesna Cvetkov. "Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta" in Aktuelna interdisciplinarana istraživanja tehnologije u arheologiji jugoistočne Evrope: Zbornik radova, Prvi skup Sekcije za arheometriju, arheotehnologiju, geoarheologiju i eksperimentalnu arheologiju Srpskog arheološkog društva, Beograd, 28.02.2020. , Beograd : Srpsko arheološko društvo (2020)
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The number of unimodular roots of some reciprocal polynomials
Dragan Stankov (2020)We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "The number of unimodular roots of some reciprocal polynomials" in Cmptes rendus mathematique (2020). https://doi.org/10.5802/crmath.28
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Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit
... (8) is reduced to: 1-n- c 1 -n 1 -n s Rn-k R- Rk-R sR k , (9) namely to: 1-n- c 1 -n 1 -n s R-n R- R-R sR , R1 < Rc < Rs. (10) No. 3, 2015 Mining & Metallurgy Engineering Bor 56 From the equation (10) the following is obtained: 1 1 1 1 n n s n s c RR RRn R , R1 ...
... (5), for- mula (8) se svodi na: 1-n- c 1 -n 1 -n s Rn-k R- Rk-R sR k , (9) tj. na: 1-n- c 1 -n 1 -n s R-n R- R-R sR , R1 < Rc < Rs. (10) Broj 3, 2015. Mining & Metallurgy Engineering Bor 66 Iz jednačine (10) dobijamo: 1 1 1 1 n n s n s c RR RRn R , R1 < Rc < Rs. ...
... .., N, are used from the table of experimental data, so that: n 111 RvK n 222 RvK ... n NNN RvK , whereby, for parameter K, the arithmetic mean is used, namely: N KKK K N...21 . (19) In this way, the model for solving the rock mass oscillation law is determined, taking: n RKv ...Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić. "Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit" in Mining and Metallurgy Engineering Bor, Bor : Mining and Metallurgy Institute Bor (2015). https://doi.org/10.5937/MMEB1503053L
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DNA/BSA interactions and cytotoxic studies of tetradentate N,N,O,O Schiff base copper(II) complexes
Aleksandar Mijatović, Angelina Caković, Aleksandar Lolić, Snezana Sretenović, Marko Živanović, Dragana Seklić, Jovana Bogojeski, Biljana Petrović (2023)Three Schiff base Cu(II) complexes, (N,N’-bis(acetylacetone)propylenediimine)copper(II) complex, [Cu(acac2pn)] (1), (N,N'-bis-(benzoylacetone)propylenediimine)copper(II) complex, [Cu(phacac2pn)] (2) and (N,N’-bis-(trifluoroacetylacetone)propylenediimine)copper(II) complex, [Cu(tfacac2pn)] (3), were used to investigate the interactions with calf thymus DNA (ct-DNA) and bovine serum albumin (BSA) using the electronic absorption and spectroscopic fluorescence methods. UV-Vis absorption studies showed that studied complexes interact with DNA molecule and exhibit moderate binding affinity. Fluorescence studies of complexes 1-3 also showed a possibility for DNA intercalation as well as a relatively high binding ability ...Aleksandar Mijatović, Angelina Caković, Aleksandar Lolić, Snezana Sretenović, Marko Živanović, Dragana Seklić, Jovana Bogojeski, Biljana Petrović. "DNA/BSA interactions and cytotoxic studies of tetradentate N,N,O,O Schiff base copper(II) complexes" in Journal of the Serbian Chemical Society (2023). https://doi.org/10.2298/JSC230614063M
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A necessary and sufficient condition for an algebraic integer to be a Salem number
Dragan Stankov (2019)We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "A necessary and sufficient condition for an algebraic integer to be a Salem number" in Journal de theorie des nombres de Bordeaux (2019). https://doi.org/10.5802/jtnb.1076
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The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments
Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević (2013)The objective of the study was to determine the origin and type of organic matter (OM) of the Tisza recent sediments along the distance of 153 km through the territory of Serbia. For this purpose group organic-geochemical parameters and biomarker compositions were used. All samples contain approximately same amount of OM, which was deposited under uniform, slightly reducing conditions. Based on the distribution of n-alkanes, the origin and type of OM could not be precisely estimated. However, n-alkane patterns ...... n-C20)+Σodd(n-C17–n-C21) / Σeven(n-C18–n-C22)]; cCPI deter- mined for distribution of n-alkanes C23–C35 (mass chromatogram m/z 71), CPI (C23–C35) = 1/2 [Σodd(n-C23– –n-C35) / Σeven(n-C22–n-C34)+Σodd(n-C23–n-C35) / Σeven(n-C24–n-C36)]; dPr/Ph = pristane/phytane Tricyclic and pentacyclic terpanes. The ...
... n of n-alkanes C16–C35 (mass chromatogram m/z 71), CPI (C16–C35) = 1/2 [Σodd(n-C17–n-C35) / Σeven(n-C16–n-C34) + Σodd(n-C17–n-C35) / Σeven(n-C18–n- –C36)]; bCPI determined for the distribution of n-alkanes C16–C22 (mass chromatogram m/z 71), CPI (C16– –C22) = 1/2 [Σodd(n-C17–n-C21) / Σeven(n-C16– ...
... such as gaso- line and diesel, have different n-alkane distributions, which range from n-C6 to n-C12, and n-C12 to n-C25, respectively. Moreover, these derivatives do not con- tain polycyclic biomarkers of the sterane and terpane types.7,8 Similarly to n-alkanes, the distributions of polycyclic alkanes ...Snežana Štrbac, Gordana Gajica, Aleksandra Šajnović, Nebojša Vasić, Ksenija Stojanović, Branimir Jovančićević. "The use of biological markers in determination of origin and type of organic matter in the Tisza river sediments" in Journal of Serbian Chemical Society, Beograd : Srpsko hemijsko društvo (2013). https://doi.org/10.2298/JSC130614087S
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On the distribution modulo 1 of the sum of powers of a Salem number
Dragan Stankov (2016)It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012
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Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine
Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...... example: λ1 = (a11·WRB1−N)+(a12·WMB1−N)+(a13·WSB1−N) WRB1−N = (1·0.1630)+(0.5·0.2968)+(0.33·0.5401) 0.1630 = 3.01492 λ2 = (a21·WRB1−N)+(a22·WMB1−N)+(a23·WSB1−N) WMB1−N = (2·0.1630)+(1·0.2968)+(0.5·0.5401) 0.2968 = 3.00825 λ3 = (a31·WRB1−N)+(a32·WMB1−N)+(a33·WSB1−N) WSB1−N = (3·0.1630)+(2·0.2968)+(1·0 ...
... specific example: _ (a11-Wrpi-n)+(412-Wopi-n)+(413-Wspi-n) __ (1-0.1630)+(0.5-0.2968) + (0.33-0.5401) __ A= = = 3.01492 Wrsi-N 0.1630 -Wrepi- -W; _ -Weopi— 2-0.1630 1-0.2968 0.5-0.5401 A> = (421:Wrpi-n)+(422-Wopi-n) +(423-Wsp1-N) ( )+( )+( ) 3.00825 Wupi_n 0.2968 -Wrpi- -W; _ -Wopi- 3-0.1630 2-0.2968 1-0 ...
... ranking of the R, M, S indicators is given for the new (B1-N, B2-N, and B3-N have the same ranking) and old machines. Table 6. The ranking of partial indicators of the availability of new and old machines. AHP Preferences B1-N (B2-N, B3-N) B1-O B2-O B3-O R M S R M S R M S R M S R 1 1/2 1/3 1 1 1 ...Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović. "Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine" in Energies, MDPI AG (2019). https://doi.org/10.3390/en12214044